Reservoir Research Articles

Challenges to the reservoir potential/Seeking more oil and gas

Challenges to the reservoir potential/Seeking more oil and gas

Challenges to the reservoir potential/Seeking more oil and gas

Challenges to the reservoir potential/Seeking more oil and gas

Role of the Environment in the Spread of MDROs

It is generally assumed that the healthcare environment can serve as a reservoir for multidrug-resistant microorganisms (MDROs). However, definitive

Feasibility Study of Coastal Reservoirs in the Zhoushan Islands, China

ABSTRACT Gu, H.; Guo, Q.; Lin, P.; Bai, L.; Yang, S.; Sitharam, T.G., and Liu, J., 2019. Feasibility study of coastal reservoirs in the Zhoushan Islands, China. Journal of Coastal Research, 35(4), ...

Molecular surveillance of malaria in potential wild reservoirs that live in a historically endemic region of Paraguay

En Paraguay, no se han registrado casos autoctonos de malaria desde el 2011. Se realizo un estudio descriptivo observacional transversal en 6 monos y 23 aves que vivian en una region historicamente endemica de Paraguay para buscar presencia de reservorios silvestres de parasitos plasmodios causantes de la malaria. El ADN se extrajo por el metodo de Chelex a partir de una gota de sangre en un papel de filtro, y la deteccion del parasito se realizo mediante la PCR multiple semianidada. Por este metodo, no se detectaron parasitos en ninguna de las 29 muestras. Se evaluo el riesgo potencial de circulacion selvatica de los parasitos que causan la malaria. Teniendo en cuenta la presencia de mosquitos anofelinos vectores en la zona, el hecho de que no se hayan observado casos positivos es un buen indicador teniendo en cuenta que nuestro pais fue declarado recientemente como pais libre de malaria por la OMS.

Crecimiento y pigmentos de Spirulina subsalsa cultivada a diferentes salinidades y concentraciones de nitrógeno

espanolEl objetivo de la presente investigacion fue evaluar el crecimiento y el contenido de pigmentos de un nuevo aislado de Spirulina subsalsa cultivada en agua mar a diferentes salinidades y concentraciones de nitrogeno. La nueva cepa de S. subsalsa se aislo a partir de muestras de agua procedentes del embalse de Clavellino, estado Sucre, Venezuela, y fue identificada haciendo uso de la clave taxonomica propuesta por Aguiar (2013). El medio de cultivo ensayado fue el f/2, modificando las concentraciones de nitrato (14,5; 29 y 58 mmol/L) y cloruro de sodio (0, 9 y 18 ‰ por adicion de agua de mar). Los cultivos se realizaron por triplicado, de forma discontinua, bajo condiciones de medio ambiente controlado (T: 30±1 oC; iluminacion: 3.000 lux; agitacion manual, fotoperiodo 12:12), durante 21 dias. Los resultados obtenidos evidenciaron que la salinidad de 9 ‰ y la concentracion de nitrato de 14 mmol/L fueron los parametros que propiciaron los mayores contenidos de biomasa; mientras que la clorofila a y la ficocianina mostraron mayores valores en la misma concentracion de nitrogeno, pero a 0 ‰. Estos hallazgos indican que la salinidad y la concentracion de nitrogeno afectan el crecimiento y los pigmentos del nuevo aislado de S. subsalsa y ademas sugieren que esta cepa posee potencial para su aprovechamiento biotecnologico con miras a obtener metabolitos valiosos en las industrias alimenticias y farmacologicas. EnglishThe aim of this research was to evaluate the growth and content of pigments of a new isolate of Spirulina subsalsa grown in seawater at different salinities and nitrogen concentrations. The new S. subsalsa strain was isolated from water samples from the Clavellino reservoir, Sucre state, Venezuela, and was identified using the taxonomic key proposed by Aguiar (2013). The culture medium tested was f / 2 Guillard, modifying the concentrations of nitrate (14.5; 29, 59 mmol/L) and sodium chloride (0, 9 and 18 ‰ by the addition of seawater). The cultures were carried out in triplicate, discontinuously, under conditions of controlled environment (T: 30±1 °C, illumination: 3,000 lux, manual agitation, photoperiod 12:12), for 21 days. The results obtained showed that the salinity of 9 ‰ and the nitrate concentration of 14 mmol/L were the parameters that propitiated the highest biomass; while chlorophyll a and phycocyanin showed higher values ​​at the same nitrogen concentration at 0 ‰. These findings indicate that salinity and nitrogen concentration affect the growth and pigments of the new isolate of S. subsalsa and suggest that this strain has potential for its biotechnological exploitation in order to obtain valuable metabolites for food and pharmacological industries.

Cement characteristics and effects on dolomite reservoir pores in the fourth member of Leikoupo Formation, Longmen Mountain front, western Sichuan Basin

Cement characteristics and effects on dolomite reservoir pores in the fourth member of Leikoupo Formation, Longmen Mountain front, western Sichuan Basin

Application of Mitrofanoff procedure in pediatric lower urinary tract dysfunction

Objective To discuss the treatment effect with Mitrofanoff procedure in lower urinary tract of pediatric patients. Methods 9 patients conducted Mitrofanoff procedure from January 2014 to January 2018 in our center were analyzed retrospectively. There were 2 boys and 7 girls, age from 4 to 14 years old (7.3 years old in average).1 child was diagnosed as bladder exstrophy, 4 children were neurogenic bladder, 2 children were bladder tumor and the other 2 were urethral trauma. All patients were conducted Mitrofanoff procedure under general anesthesia, used appendix as the conduit, 3 patients used their original bladder as reservoir, bladder augmentation was employed in 4 patients and ileal neobladder was employed in 2 patients to construct reservoir. The distal of appendix was inserted into submucosal of reservoior and the proximal end was connected to the umbilical or lower abdominal wall. Results The operations were all successfully completed without sever complications, the time spent was 176-210 min, 190 min in average, hemorrhage amount 20-35 ml. Patients were followed up 15 to 50 months, the bladder capacity is 80 to 120 ml. Hydronephrosis was improved compared with pre-operative condition. 4 children diagnosed with neurogenic bladder still suffered vesical ureteral reflux. All patients can conduct clean intermittent catheterization without difficulty. There was no leakage of urine from the stoma, while 2 patients showed leakage of urine from urethra when exercising, so we closed the bladder neck 6 month later. Conclusion Mitrofanoff procedure can be implied in children with end-staged lower urinary tract dysfunction due to nerogenic bladder, bladder tumor, bladder exstrophy, which makes intermittent catheterization become more convenient. Key words: Lower urinary tract dysfunction; Appendix conduit; Urinary diversion; Reservoir

Determination of accumulation periods and relative maturity of tight oil and gas in Gaotaizi oil reservoir of Qijia area by using fluorescence spectrum of oil inclusions

Determination of accumulation periods and relative maturity of tight oil and gas in Gaotaizi oil reservoir of Qijia area by using fluorescence spectrum of oil inclusions

Distribution characteristics and exploration strategy of middle-shallow lithologic reservoirs in offshore mature exploration areas: a case study on Huizhou sag in the Pearl River Mouth Basin

Distribution characteristics and exploration strategy of middle-shallow lithologic reservoirs in offshore mature exploration areas: a case study on Huizhou sag in the Pearl River Mouth Basin

Looking for high-production carbonate reservoirs using logging data: a case of study on Jurassic in Shakan oilfield, Kurdish region, Iraq

Looking for high-production carbonate reservoirs using logging data: a case of study on Jurassic in Shakan oilfield, Kurdish region, Iraq

Differential hydrocarbon accumulation process of heavy oil reservoirs in Sanhecun sag of Jiyang depression

Differential hydrocarbon accumulation process of heavy oil reservoirs in Sanhecun sag of Jiyang depression

Effect of temperature on oil/water relative permeability of heavy oil reservoirs in Well J7, Changji oilfield

Effect of temperature on oil/water relative permeability of heavy oil reservoirs in Well J7, Changji oilfield

Study on the Variation Characteristics of Runoff and Sediment in Taizihe Watershed, Liaoning Province

Based on runoff and suspended sediment of 9 stream gauging stations and precipitation of 31rainfall statsions from 1973 to 2011 in Taizihe River watershed, areal composition, temporal trend and relationship of runoff and sediment were analyzed. The results showed that the feature of runoff and sediment came from different areas existed above Benxi hydrometric station, while runoff and sediment came from the same area in the Benxi-Liaoyang section, where the erosion and sediment yield were severe, with the percentages of sediment discharge from tributaries larger than the percentages of area and runoff, however, because of reservoirs, a large amount of sediment deposited in this section. The feature of runoff and sediment came from different areas also existed in Liaoyang-Tangmazhai section, with Liaoyang and Lishan as the source of runoff and other areas of sediment. For the 9 hydrometric stations, the average correlation coefficient between precipitation and runoff depth, modulus of sediment yield, and sediment concentration was 0.895, 0.607, and 0.315, respectively, indicating a decreasing correlation. The Mann-Kendall trend test showed there was no trend in precipitation, and insignificant decreasing trends in runoff depth and runoff coefficient. There were 5 hydrometric stations showed significant decreasing trend in modulus of sediment yield and 1 station significant increasing trend. There were 6 hydrometric stations showed significant decreasing trend in sediment concentration and 1 station significant increasing trend. The double mass curves analysis showed that under the same precipitation, the runoff depth of only 3 hydrometric stations decreased from 1997, and under the same runoff depth, decreasing trend in the modulus occurred for 6 hydrometric stations, increasing trend for 1 station, and no trend for 2 stations.

Modeling of decision-makers negotiations in reservoir operation with respect to water quality and environmental issues

Decision-makers have different and sometimes conflicting goals with utilities in operating dam reservoirs. As repeated interactions exist between decision-makers in the long-term, and the utility of each decision-making organization is affected not only by its selected strategy, but also by other rivals\' strategies; selecting and prioritizing optimum strategies from a decision maker\'s point of view are of great importance while interacting with others. In this paper, a model based on a fuzzy set theory, for determining the priority of decision-makers\' strategies in optimal qualitative-quantitative operation management of dam reservoir is presented. The fuzzy priority matrix is developed via defining membership functions of a fuzzy set for each decision maker\'s strategies, so that all uncertainties are taken into account. This matrix includes priorities assigned to possible combination for other decision makers\' strategies in bargaining with each player\'s viewpoint. Here, the 15-Khordad Dam located in the central part of Iran, suffering from low water quality, was studied in order to evaluate the effectiveness of the model. Then, the range of quality of water withdrawal agreed by all decision-makers was determined using the prioritization matrix based on fuzzy logic. The results showed that the model proposed in the study had high effectiveness model.

Diffracted Landscapes of Attention: Jon McGregor’s Reservoir 13

Avec Reservoir 13 (2017), Jon McGregor cultive l’attention a l’ordinaire et poursuit son offensive contre le personnage. Il en profite egalement pour mettre a mal les conventions de la pastorale et du paysage, au son des mines qui font exploser les parois de la carriere, quelque part au-dessus du village anonyme dans lequel se situe l’action du recit. Le roman semble par ailleurs s’ouvrir sur une intrigue policiere pour mieux utiliser cette convention comme leurre, preferant se concentrer sur les rythmes naturels et les activites humaines et animales dont l’evocation recurrente est regulierement ponctuee par le souvenir d’une adolescente de treize ans disparue dans les collines. Cet article se propose de montrer comment l’evocation du lieu rejette les conventions de la distance et de l’objectification pour mieux menager une perspective phenomenologique (Omhovere). En optant pour les menues perceptions de l’ordinaire et du quotidien, il evite toute tentative de totalisation associee a la representation traditionnelle du paysage et figure un champ de possibilites favorisant le mouvement et la mutabilite (Berberich, Campbell and Hudson). Les objets et composants non humains peuplant le paysage creent un espace relationnel qui est a la fois le produit et la condition d’un paysage expressif anime par la vibrance (Bennett) de l’eau, des mineraux, des fleurs et des arbres. La logique paratactique et le refus de toute hierarchie et causalite exigent une attention aux singularites qui promeut la lenteur et rappelle au lecteur que l’attention est au cœur de la responsabilite (Foley Sherman).

Allogeneic Stem Cell Transplantation Affects HIV-1 Reservoir

A persistent reservoir of cells containing latent HIV virus contributes to rebound viremia upon discontinuation of combination antiretroviral therapy

Data for: Organic geochemistry of the Upper Triassic T3x5 source rocks and the hydrocarbon generation and expulsion characteristics in Sichuan Basin, Central China

Abstract The Upper Triassic Xujiahe Formation is a key target layer for development of tight sandstone gas reservoirs in the Sichuan Basin. Most of the previous work focused on the main reservoirs such as T3x2 and T3x4 with lack of research attention on T3x5, an equally important source-reservoir unit. Here we examine the organic matter and source rock distribution in the T3x5 using rock pyrolysis, asphalt extraction, and gas chromatography. The thickness of T3x5 source rocks reduces from west and northwest Sichuan Basin to east and southeast Sichuan Basin. The main sedimentary facies are salt lakes and deltas, of which the organic matter originated from aquatic organisms and a small amount of terrestrial matter. The abundance of total organic carbon (TOC) in T3x5 is relatively high, at values of 0.07%–7.2%. According to the vitrinite reflectance (Ro), pyrolysis, and gas chromatography measurement results, the T3x5 source rocks are at the stage of mature to over-mature, and their hydrocarbon expulsion threshold and hydrocarbon expulsion peak correspond to Ro of 1.05% and 1.23%, respectively. Furthermore, a hydrocarbon generation center and a hydrocarbon expulsion center are formed horizontally, with the maximum hydrocarbon generation intensity of 50 × 108 m3/km2 and the maximum hydrocarbon expulsion intensity of 48 × 108 m3/km2. The natural gas resource is 3.19–5.36 × 1012 m3, indicating great exploration potential.

Status of endangered fish species Aulopyge huegelii Heckel, 1843 (Teleostei: Cyprinidae) in the Buško Blato reservoir, Bosnia and Herzegovina

The Dalmatian barbelgudgeon, Aulopyge huegelii is a stenoendemic fish species restricted to the area of west Bosnia and part of Dalmatia. Its global IUCN species status is “endangered (EN)” according to the “B1ab (iii, v)” criterion. There are not enough reliable sources containing data on this species, particularly in the recent period. As primarily a groundwater fish, it was exceptionally well adapted to environmental conditions in the Busko Blato reservoir. Based on the recent findings, the status of this species has changed over the past several years. The main objective of this study was to characterise and determine the current status of the monotype species A. huegelii from the Busko Blato reservoir, through the analysis of its selected morphological and ecological features. During field research, we have gathered 88 individuals of A. huegelii , at just four neighbouring sites. A significant decrease in its population number is evident in comparison to previous studies. The results have shown its retreat into a small part of the reservoir which is connected with the groundwater system as its primary habitat, in order to escape from predators: the four new allochthone species in this ecosystem. Comparing the results with previous studies, it could be concluded that the Dalmatian barbelgudgeon is “returning” to its original morphological form i.e. groundwater fish form. All this could in perspective have significant consequences on the survival of the population of this species in the Busko Blato reservoir.

Índice de Conformidade ao Enquadramento nos Reservatórios Jucazinho, Bituri, Botafogo e Pirapama, em Pernambuco, Brasil (Guideline Compliance Index in Reservoirs Jucazinho, Bituri, Botafogo and Pirapama, in Pernambuco, Brazil)

Este artigo apresenta a aplicação do Índice de Conformidade ao Enquadramento (ICE), o qual avalia a condição de um corpo hídrico em relação às metas de enquadramento estabelecidas em reservatórios do estado de Pernambuco, correlacionando os resultados obtidos com o comportamento pluviométrico e com o uso e ocupação do solo da região na qual estão inseridos. A metodologia constituiu-se de levantamento dos dados referentes ao monitoramento sistemático da qualidade da água nos reservatórios avaliados, consulta à Resolução CONAMA n° 357 de 2005 para identificação das possíveis classes de enquadramento dos corpos hídricos e cálculo do ICE. Os reservatórios apresentaram ICE em classificações distintas devido às diferenças de regime pluviométrico e de uso e ocupação do solo nas respectivas bacias de contribuição hídrica. Observou-se que os reservatórios localizados no Agreste do Estado possuem maior grau de desconformidade e estão mais distantes de atender aos objetivos do enquadramento, em comparação aos reservatórios localizados no Litoral pernambucano, que apresentam melhores condições qualitativas de água. A B S T R A C TThis paper presents the implementation of the Guideline Compliance Index (ICE), which evaluates the condition of a water body in relation to the framework of targets in reservoirs in the state of Pernambuco, correlating the results with the rainfall behavior and with land use and occupation of the region in which they are inserted. The methodology consisted in the collection of data for the systematic monitoring of water quality in the evaluated reservoirs, studies based on the literature and based on CONAMA Resolution n° 357 of 2005 to identification the framework of classes of water bodies and calculation ICE. The reservoirs showed ICE in different classifications because of differences in relation to climatic aspects and rainfall and land use and occupation of the contribution of basins in which they live, with the reservoirs located in the State of Agreste, more far from meeting the objectives of the framework compared to the reservoirs located on the Coast of Pernambuco, which showed better water conditions.Keywords: ICE, guideline, reservoirs, water quality.