Volume Of Gas Production Research Articles

Nitrogen Oxide Emissions from U.S. Oil and Gas Production: Recent Trends and Source Attribution

AbstractU.S. oil and natural gas production volumes have grown by up to 100% in key production areas between January 2017 and August 2019. Here we show that recent trends are visible from space and can be attributed to drilling, production, and gas flaring activities. By using oil and gas activity data as predictors in a multivariate regression to satellite measurements of tropospheric NO2 columns, observed changes in NO2 over time could be attributed to NOx emissions associated with drilling, production and gas flaring for three select regions: the Permian, Bakken, and Eagle Ford basins. We find that drilling had been the dominant NOx source contributing around 80% before the downturn in drilling activity in 2015. Thereafter, NOx contributions from drilling activities and combined production and flaring activities are similar. Comparison of our top‐down source attribution with a bottom‐up fuel‐based oil and gas NOx emission inventory shows agreement within error margins.

Современное состояние и воздействие нефтегазовой отрасли на окружающую среду Казахстана

The article considers the current state of the oil and gas industry of the Republic of Kazakhstan, the volume of oil and gas production in recent years. Also, the impact of the oil and gas industry on land resources and the environment in General. It is investigated how harmful the oil and gas industry is to the environment, and some methods of cleaning oil pollution of soils and soils are reflected. The article shows the relevance of environmental and economic problems of the oil and gas complex of the Republic of Kazakhstan and possible ways to solve them, analyzes the role of the oil industry in the political and social development of the country. It is noted that the oil and gas complex has specific features that increase the intensity of man-made impact in environmental pollution. Today, one of the most pressing environmental problems is environmental pollution in oil and gas production areas. The ways of solving environmental safety at oil and gas fields are studied, taking into account the qualitative composition of Kazakhstan's oil, the latest innovative solutions to reduce emissions of toxic elements into the environment during the extraction and processing of hydrocarbons.

Geomechanics and Flow Parameters that Influence Shale Gas/Shale Oil’s Design

Unconventional reservoirs (NCR) have been responsible for an important revolution in the volume and profile of gas production in the USA and are now arousing interest of other countries e.g. China, Canada, Argentina and Australia. In most of the NCR, the development of production has been made possible through horizontal wells with multiple transverse fractures. In order to optimize the well hydraulic fracturing design for exploration and production’s development of shale gas/shale oil, is required to understand the key parameters that influence in the complex fractures network. In terms of reservoir stimulation through horizontal wells, the practice by smaller operators came before the theory, generating nice results and promoting theoretical development. The recent join of big operators into the unconventional reservoirs environment raised about the huge volumes of fluids and propping agents used in the complex fractures network, have generated some questions about shale gas/shale oil well stimulation. This work presents the main parameters that have influence on the complex fractures network built in shales, aiming to understand their effects in shale rock in order to avoid problems and optimize the hydraulic fracturing design.

Effect of N2O produced by indigenous denitrifiers in oil reservoir on the physical properties of crude oil

The success of microbial enhanced oil recovery (MEOR) relies on complex microbial processes. Nevertheless, the contribution and mechanism of in-situ denitrification to microbial oil recovery remain unclear. In this study, eight denitrifying bacterial strains, designated T1, D1, D44, D46, D15, S1, S2 and S6, were isolated from the produced water of Xinjiang Oilfield, China, by a double layered plate method. The16S rDNA gene sequences of these denitrifying strains shared 100% similarity with Pseudomonas stutzeri (T1, D1, and D44), Pseudomonas putida (D46 and D15), and Pseudomonas aeruginosa (S1, S2, S6), respectively. The N2O production effects of these strains on the physical properties of crude oil were evaluated with batch experiment. Results showed that the highest total gas yield was observed with sucrose as carbon source, and the maximal concentration of N2O occurred with glycerol as carbon source. The denitrification process by these bacterial strains led to volume expansion and viscosity reduction of crude oil. Crude oil expansion rate was positively correlated with the concentration of N2O, with a correlation coefficient of 0.983, but not correlated with the volume of total gas production. Strain S1, S2, and S6 produced 530-730 mg·L-1 of surfactant using glycerol as ole carbon source, which could reduce surface tension and emulsify crude oil. However, these surfactant-producing strains produced less N2O, exhibited weaker effects on oil swelling and viscosity reduction, compared to the none-surfactant-producing denitrifying strains. Our results suggested that more attention should be paid to the ability of N2O production by denitrifying bacteria when exploiting microbial resources towards enhancing oil recovery.

Parameter of ruminal feed fermentation in vitro with addition of clove essential oil (Syzygium aromaticum L.) as feed additive

Clove essential oils (CEO) effect as rumen modifier on rumen fermentation was studied using in vitro gas production technique. Feed consisted of king grass, wheat pollard and rice bran (60:20:20) were incubated in buffered rumen liquid at 39ºC for 24 hours with Ongole grade cattle rumen liquor as microbe donor. The CEO was added and mixed with feed to meet its levels of 0, 25, 50, 75, and 100 µl/L of fermentation medium. Volume of gas production was measured at the end of fermentation. Broth was collected for pH, protozoa number, ammonia, and microbial protein synthesis measurement. Medium pH ranges from 7.12 to 7.20, were not affected by CEO. Gas production reduced at CEO doses 75 and 100 µl/L (P<0.01). Ammonia concentration at all treatment was higher than control, whereas protozoa number were decreased by CEO (P<0.01). Protozoa ranged from 18.08 to 32.81 x 104 cell/ml reduced gradually by CEO doses 25 to 100 µl/L. Meanwhile, protein microbe at CEO 25 and 50 µl/L (141.54 and 141.11 mg/100 mL) were higher than control (P<0.01). CEO doses 75 and 100 µl/L did not change microbial protein. In conclusion, CEO addition up to 50 mg/l increase rumen feed efficiency.

Energy saving is a major trend in shaping the EU energy package: lessons for Ukraine

Dziadykevych Yu.V., Sokhatska O.M., Liubezna I.V. ENERGY SAVING IS A MAJOR TREND IN SHAPING THE EU ENERGY PACKAGE: LESSONS FOR UKRAINE Purpose. The aim of the article is to research the aspects of foreign experience in the management of energy saving processes and energy efficiency of production activities. Methodology of research. The methodological basis of the study is the dialectical method of scientific knowledge. General and special methods are used in the course of the research, namely: abstract and logical (to outline the main factors that influence the management of energy-saving processes and energy efficiency of enterprises), deductive (to analyse the directions that contribute to energy-saving production activities) and generalization (when research of possibilities of introduction of innovations which are directed on development, creation of new types of technologies and new organizational forms of production). Findings. There are a number of barriers to effective energy use, such as financial, managerial, administrative, legal and market barriers. It is proved that energy saving should be a priority direction of the economic policy of the enterprise, while strategic directions of energy efficient policy of Ukraine should be: increase of volumes of own oil and gas production on the basis of new technologies; modernization of transport infrastructure; diversification of energy resources; reducing the share of energy-intensive industries and shaping the outlook for saving energy in society. It is substantiated that much attention should be paid to renewable energy, since this will demonopolize key segments of the energy market and ensure its transparency and predictability, thereby promoting the rational use of energy resources. External factors have been found to have a significant impact on energy conservation, in particular: regulatory framework, stability of the energy market, state incentive measures, material interest of producers in the implementation of energy-saving technologies and saving of energy resources. It is revealed that in the industrialized countries of the world there is an increase in the energy sector in the structure of the national economy, since the constant rise in prices for oil and natural gas leads to energy dependence on exporting countries and this problem is solved by energy conservation and the use of mixed energy supply. It is substantiated that the concept of efficient use of solar energy should take into account the peculiarities of the electricity complex of Ukraine in the context of integration into the EU energy space and accession to its energy packages. Originality. For the first time, it has been established that energy saving should be a priority direction of Ukraine's economic policy, which, unlike the existing one, allows to define strategic directions of energy efficient policy in Ukraine for increasing its own oil and gas production using modern types of technologies. The modernization of transport infrastructure and the diversification of energy sources have been further developed. The directions of reducing the share of energy-intensive industries and shaping the outlook for saving energy in Ukraine have been improved. Practical value. The introduction of high-energy and environmentally friendly energy sources into the production processes of enterprises in different sectors of the economy will increase their efficiency. Key words: energy saving; energy efficiency; energy resources; renewable energy sources; economic instruments; foreign experience.

Digital transformation of gas production

The development of the digital transformation of the gas industry in the Russian Federation is mainly aimed at unique and giant fields. These fields provide the leading position of Russia in the world gas market and about 85 % of the total volume of gas production. The regulatory and technical base, the composition of the existing standards allows us to move to the practice of introducing digital gas technologies. The creation of a unified integrated model is being completed at the Bovanenkovo field. The creation of a digital twin of a unique gas field represents the transfer of a real field into virtual space through the use of Big data analytics and supercomputer technologies.

The Assessment of the Impact of Sanctions on Russia for Oil &amp; Gas Industry and Defence Industry Complex of Russia

The article presents the results of the author’s research of the impact of a wide range of restrictions and prohibitions applied to theRussian Federation, used by a number of countries for their geopolitical purposes and as a means of competition. The object of study was the impact of anti-Russian sanctions on the development of Oil &amp; Gas industry and defence industry complex ofRussiain 2014–2016. The purpose of the analysis was to assess the impact of sanctions on the volume of oil and gas production, the dynamics of foreign earnings from the export of oil and gas, and of foreign earnings from the sale abroad of military and civilian products of the Russian defence industry complex (DIC). As the research method, the author used the economic analysis of the time series of statistical data presented in open statistics and literature. The author showed that some countries use the anti-Russian sanctions as a means of political, financial, economic, scientific, and technological struggle with the leadership ofRussiaand Russian economic entities. It is noteworthy that their introduction in 2014 coincided with the readiness of theUSto export gas and oil, which required a niche in the international energy market. The imposed sanctions have affected the volume of oil production inRussia, which was one of the factors of reduction of foreign earnings from the country’s oil and gas exports. However, the Russian defence industry complex has relatively well experienced the negative impact of sanctions and other non-market instruments of competition

Effect of Xylanase and Phytase Supplementation on Goat's Performance in Early Lactation.

Supplementing diets of dairy animals with phytase and xylanase can enhance phosphorus availability and fiber degradation in the rumen and positively affect animal's health and productivity. In vitro and in vivo trials have been conducted to define the optimal addition level of xylanase and phytase to lactating Baldi goat's rations and investigate effects of these enzymes on animal's nutrients digestibility, blood chemistry, milk production and milk composition. In vitro batch culture technique was used to evaluate the effect of phytase and xylanase supplementation at different levels (0, 1, 2 and 3 g kg-1 DM) on rumen fermentation characteristics. Eighteen early lactating Baldi goats were randomly assigned into three groups and fed 4% dry matter according to their body weight. The first group was fed control ration (35% yellow corn, 20% corn stalks, 20% berseem hay, 12.5% soybean meal and 12.5% wheat bran), the second group fed control ration+Penizyme at 2 g kg-1 DM (R1), while the third group fed control ration+Phtase-Plus® at 1 g kg-1 DM (R2). Xylanase and phytase supplementation increased the in vitro DM and OM degradability and ruminal NH3-N and total volatile fatty acids (TVFA) concentrations, with no effect on total gas production (TGP) volume. All nutrients digestibility (except CP), blood serum glucose concentration, milk production and milk components yields were increased for enzymes supplemented goats than control. Inclusion of xylanase and phytase in lactating goat's rations improved their productive performance with no deleterious effects on their health.

English

A 4000 L bio-digester was designed and fabricated using 5 mm mild steel plate with the main purpose of generating biogas and bio-fertiliser for Auchi Polytechnic Demonstration Farm. To achieve this, a varying ratio of 1.155 m3: 2.310 m3 mixtures of cow dung and water were anaerobically digested in the batch digester. The experiment lasted for 33 days during which the quantity of gas generated were evaluated. The volume of daily methane gas production ranged from 0 to 1.2 m3. The total volume of gas generated from the digestion was 21.68 m3 and comprised of 58% CH4, 25% CO2, 15% H2S and 2% other impurities. The results of physiochemical properties of the feedstock revealed a progressive increase of 6.0-6.2 in pH value from Day 4 after which it dropped sharply in value to 5.5 on the second week of fermentation. The minimum and maximum ambient temperatures of 24 and 30&deg;C were observed while the slurry temperatures varied from 27 to 35&deg;C. The average pressure built up of the digester was about 214,000 N/m2. The results further showed that biogas production is sensitive to pH and cannot produce optimally below the pH of 6.5. To achieve optimum biogas generation, a temperature range within mesophilic condition of 25 to 40&deg;C and pH values of 7 should be maintained. Key words: Biogas, mesophilic temperature, retention period, anaerobic digestion, digester. &nbsp

Проблеми та перспективи стабілізації і нарощування видобутку природного газу в Україні

We present the results of analysis of the resource base of gas production in Ukraine and structure of recoverable reserves, which showed that the structure of established resources affects not only the volumes but also the character of dynamics of natural gas production. It is proposed to consider separately the problems of stabilization of the volumes of natural gas production and the problems of increasing its production, because they differ significantly in technical and technological processes, the level of risks and expenses, and the timing of production. Taking into account the complicated structure of Ukrainian natural gas reserves that are under development, the priority lines of work for the stabilization of production volumes have been formed. It is established that, due to the improvement of field-production systems, it is possible to provide only the compensation of their natural fall and to keep production at the current level of 20 – 21 billion m³ per year. We show that an increase in natural gas production is possible only under conditions of rapid and efficient performing exploratory works for the accretion of recoverable reserves of natural gas in amounts of at least 40 – 50 billion m³ per year, which is possible only on the basis of the latest high-performance technological processes and methodological decisions of at least the average world level. We analyzed the potential natural gas resources from various sources, including unconventional, and showed the need for development at the national level of individual programs of resources development for each of these sources with accelerated application of traditional, especially hard-to-recover reserves and resources. We obtained estimates of the cost and duration of main stages of the application of natural gas resources and reserves, depending on the reserves of fields and reservoir depths. Finally, the possibility of full supply of Ukrainian consumers with domestic natural gas was estimated.

Evaluating rumen fermentation kinetics and nutritive value of sunflower seed meal supplemented with acetonic extract of pomegranate peel using &lt;i&gt;in vitro&lt;/i&gt; gas production technique

This study was conducted to investigate effects of supplementing different levels (0.0, 0.5 and 1.0% of buffered rumen fluid) of acetonic extract of pomegranate peel on rumen fermentation kinetics of sunflower seed meal (SFM), using in vitro gas production technique. The samples were incubated in syringes containing rumen liquor obtained from three cannulated Iranian Ghezel rams for 2, 4, 6, 8, 12, 24 and 36h. Results indicated that, addition of acetonic extract of pomegranate peel resulted in increase in gas production volume in all of incubation times (p &lt; 0.0001). Amount of gas production, also increased by increasing dose of the extract. Amounts of a (the gas production from the immediately soluble fraction), b (the gas production from the insoluble fraction) and a + b (the potential gas production) for pomegranate peel extract supplemented sunflower seed meal were higher (p &lt; 0.05) than that of control meal. Adding pomegranate peel extract resulted in increase estimated short chain fatty acids (SCFA) production as well as digestible organic matter (DOM), metabolizable energy (ME) and net energy for lactation (NEL) content of SFM. Production of SCFA as well as DOM, ME and NEL content of SFM increased (p &lt; 0.05) by enhancing the level of the extract supplementation. In conclusion, it can be suggest that, supplementing acetonic extract of pomegranate peel may be lead to higher ruminal fermentation and better nutritive value of SFM in ruminants.

Effect of β-Cyclodextrin on the Quality of Wheat Flour Dough and Prebaked Bread

This work investigated the effects of the addition of different concentrations (0–3.0 wt%) of β-cyclodextrin (β-CD) on the properties of wheat dough and prebaked bread. Dough tensile test results and scanning electron microscopy revealed that the addition of 0.5–1.5 wt% β-CD enhanced dough tensile strength and promoted gluten formation. The addition of 2.0–3.0 wt% β-CD, however, failed to improve gluten network formation. Fourier transform infrared spectroscopy showed that the α-helix-to-β-sheet ratios of dough samples increased as β-CD content increased. This result indicated that the protein secondary structure of the dough had changed. Fermentation rheometry illustrated that dough fermentation height, gas production volume, and gas-holding capacity increased with the addition of 0–1.5 wt% β-CD. Dough fermentation capacity decreased when the addition of β-CD exceeded 2.0 wt%. The effect of β-CD on the quality of prebaked frozen bread was also studied. The results of texture profile analysis indicated that the addition of 1.5 wt% β-CD could reduce bread hardness and increase bread crumb elasticity and resilience. The results of the C-cell test further demonstrated that the addition of 1.5 wt% β-CD could increase stomatal number and decrease pore number and pore wall thickness. These characteristics suggested that the addition of β-CD improved bread structure.

A novel in situ N2 generation system assisted by authigenic acid for formation energy enhancement in an oilfield.

The in situ N2 generation technique is a promising method for enhancing oil recovery (EOR) and blockage removal. Conventionally, N2 is generated through the redox reactions of sodium nitrite (NaNO2) and ammonium chloride (NH4Cl). The effect of several parameters on N2 production was studied in this work. The reaction kinetics between NaNO2 and NH4Cl were developed. The results revealed that the optimal molar ratio was 1 : 1 for the reactants and a higher concentration of reactants, H+ and higher temperature would lead to an increase in the gas production volume and a better gas-generating efficiency. The kinetic equation of the N2 generation reaction was defined as dc/dt = −7.103 × 107cH+1.3291c02.0949e(−51.28 kJ mol−1)/RT. Methyl formate, ethyl formate, ammonium persulphate as well as paraformaldehyde were selected as authigenic acids by measuring their pH values and their effect on the rate of gas-generation, and the gas production volume was studied. An energy enhancement experiment was conducted to examine the influence of reactant concentration, initial pressure and different authigenic acids on energy enhancement and gas-generating efficiency. The results showed that the increase in reactant concentration can improve the energy enhancement while neither the reactant concentration nor the initial pressure could hardly influence the gas-generating efficiency. The presence of authigenic acids can considerably enhance both the gas production volume and the gas-generating efficiency of the system. The ammonium persulphate assisted N2 generation system is considered to be suitable for field applications.

Bioconversion of Mixed Fruit Waste as a Potential Source of Biogas and Organic Fertilizer

This paper investigates the bioconversion of mixed fruit waste as a potential source of biogas and organic fertilizer. The pH of digester liquid, influent and effluent, temperature of gas production volume were observed. In addition to this, TS and VS of the manure before and after digestion were determined. The TS/VS lost in fermenter and efficiencies of VS conversion to gas was also monitored at the end of the study. The study also shows that residue left after the production of biogas is a valuable organic fertilizer that can be used as an alternative to inorganic fertilizer in maize production and soil fertility. Yield of maize was significantly increased over that of the control. Markedly influenced by the application of organo-minerals, NPK fertilizer and their combination as observed from the increased plant height, diameter of plant stem, leaf area and Weight of 1000 kernels compared to the control. Biogas residue has therefore proved to be environmentally friendly and an effective fertilizer. The use of locally available, nutrient rich organic sources is an effective means for improving soil fertility and increasing crop yield in view of the escalating cost of inorganic fertilizers and low fertilizer use efficiency of crops.

Gas production technologies on gas fields at final stage of development

About 80% of produced natural gas in Russia is taken from Cenomanian gas deposits of Western Siberia. For a long time, the main volume of gas production was selected on the largest unique deposits in the region - Medvezhye, Urengoyskoye, Yamburgskoye. Currently, the development of Cenomanian deposits of these fields has approached the final stage, and the production of initial balance reserves has exceeded 80 percent threshold. It is known that during gas sampling of more than 80-85%, there is a significant decrease in reservoir pressure, and further extraction of the remaining reserves on condition of their main transportation becomes economically inefficient due to the sharply increasing cost of the extracted products. Residual gas reserves of such deposits are not profitable for production, but with deep compression some of them can be extracted. This part is called “low-pressure gas” in Russian terminology. The assessment has shown that reaching an 85 percent production threshold of balance reserves of Cenomanian deposits, only on Medvezhye, Urengoy and Yamburg fields, there will be at least 1 trillion 700 billion cubic meters of gas, of which more than 600 billion cubic meters is “low-pressure gas”. The experience of cost-effective extraction of such reserves is currently lacking. The high degree of infrastructure development and the importance of socio-economic factors require the introduction of new technical solutions to extend the development and increase the final gas recovery of these fields. Today, within the walls of research and design institutes dealing with the problems of developing Cenomanian gas deposits, the tasks are solved to create new and improve already approved technological approaches for the development of “low-pressure gas” deposits. In this article, an attempt is made to define “low-pressure gas”, to estimate its volumes for currently developed Cenomanian gas deposits of Yamal-Nenets Autonomous District and to give a brief description of proven and promising technical solutions for the well operation at the final stage of development.

Досвід розвитку газовидобувної галузі США

We present a comparative analysis of the actual (2000–2017) and predicted parameters of the Energy Strategies of 2006 and 2013 on natural gas production in Ukraine. The time history of volumes of natural gas production and consumption in the world and USA during 2000–2017 is investigated. The time history of volumes of traditional and non-conventional gas production in the USA is analyzed. The state of proven reserves of natural gas from different fields (gas and gas-condensate fields, oil fields, coal basins, shale rock, and tight sands) and the connection with the volume of its production are given. Specific features of the organization of hydrocarbons production in the USA, in particular, the small business activity in this industry, are explored. It is proved that an important element of the US state policy on development of oil and gas industry is the implementation of tax preferences, the earliest of which is over 100 years old, while the newest one is just over 10. It has been shown that the present flexible system of tax preferences in the country makes it possible to profitably exploit fields and produce hydrocarbons, including natural gas from hard-to-recover reserves (shale rock and tight sands). The time history of prices for natural gas and electricity for different categories of consumers in the USA during 2000–2017 is considered. The mutual influence of volumes of natural gas consumption, its production, and its prices as well as electricity prices for the main categories of consumers is analyzed. The US experience, especially that сoncerning state incentives and support for the development of gas industry, should be taken into account in generating forecasts for the development of this industry in Ukraine and the directions for their execution.

Gas production and in vitro degradability of sheep diets containing propolis ethanolic extract

SUMMARY This study evaluated the influence of the propolis ethanolic extract (PEE) on gas production and in vitro degradability of sheep diets. Five experimental diets (treatments) were evaluated: without addition of PEE; 6 mL PEE; 12 mL PEE; 24 mL PEE and 36 mL PEE/kg concentrate. The experimental diet consisted of 50% elephant grass (Pennisetum purpureum) and 50% concentrate. There was a quadratic effect (P &lt;0.05) for the volumes of total gas production (Vt), gases produced by the rapid degradation fractions (Vf1), and for in vitro degradability at 120 hours (Deg120), where the lowest values of Vt, Vf1 and Deg120, were found for the inclusion of 9.4 mL PEE/kg concentrate. Gas production by fermentation of the slow degradation fraction (Vf2) presented a mean of 25 mL/g DM (P &lt;0.05). The colonization time of food particles (λ) significantly reduced (P&lt;0.05) with increasing inclusion of PEE. Thus, it can be concluded that the PEE up to the inclusion of 9.4 mL/kg concentrate was efficient in inhibiting in vitro total gas production and from the fractions of rapid degradation by 9.9 and 15.3%, respectively, in addition to promoting a reduction of 5.3% in degradability after 120 h incubation in diets with a concentrate: forage ratio of 50:50. Thus, the inhibition in gas production was proportionally greater than the reduction of degradability.

Pengaruh Dimensi terhadap Volume Gas HHO dan Daya Listrik pada Proses Elektrolisis

The electrode area have an effect on HHO gas production volume, this phenomena influenced by electric power absorbed from the energy source to the electrode. It is necessary to examine how much the influences on process of the water electrolysis. In this research the effect of the electrode total area on the electrolysis process analyzed to determine the volume of HHO gas and electric power absorbed. The experimental method by testing the extent of several electrodes without the connection and calculating the entire surface on the electrode. The electric power is absorbed among other L1 = 6.413 mm 2 : 5,2 ml : 0,774 watt, L2 = 10.028 : 28 mm 2 : 7 ml : 0,9030 watt, L3 = 14.328 mm 2 : 15 ml : 2,451 watt and L4 = 14.3608 mm 2 : 20 ml : 6,192 watt. In this research, the highest result on the electrode having L4: 14.360,8 mm 2 = 6,192-watt area. This result influenced by the surface area reacting with water at the anode and cathode of the 12 Volt 70 AH battery and the capacity of the electrolysis generator.

Pilot-scale experimental evaluation of gas recovery from methane hydrate using cycling-depressurization scheme

Methane hydrate is considered as a potential source of methane for energy supply. Therefore, developing approaches for enhancing gas recovery from hydrate reservoir is attracting extensive attention. The Pilot-Scale Hydrate Simulator (PHS), with an inner volume of 117.8 L, was applied to investigate gas recovery approach from hydrate reservoir. A novel cycling depressurization was carried out to improve the production efficiency of depressurization method. Three different schemes for gas recovery from hydrate reservoir were performed in the PHS, which were the Regular Depressurization (RD), the Semi-Cycling Depressurization (Semi-CD), and the Cycling Depressurization (CD), respectively. The production behaviors and heat transfer characteristics during hydrate dissociation in sandy sediments by different methods were compared and investigated. The advantages of the novel cycling depressurization were analyzed. The experimental results indicate that the effective average gas production rate in the experiments by CD is 17 times larger than that by RD. The energy cost per volume of gas production by the CD scheme can be significantly reduced by comparing with the RD scheme. Therefore, the production efficiency can be strongly enhanced by using cycling depressurization method. If the hydrate is dissociated by RD, the heat transfer is strongly coupled with the hydrate dissociation. However, if the hydrate is dissociated by Semi-CD or CD, the coupling of heat transfer and hydrate dissociation may be changed. During the well closing stage in the Semi-CD or CD scheme, the lower fluids flow rate in pores leads to a lower heat transfer rate, which leads to a lower hydrate dissociation rate in well closing stage.