North West Java Research Articles

Problem Solving of Hole Enlargement in Shale Formation Using XRD and CEC Analysis Approach: A Case Study of Well HES-003 in the North West Java Region, Indonesia

Problem Solving of Hole Enlargement in Shale Formation Using XRD and CEC Analysis Approach: A Case Study of Well HES-003 in the North West Java Region, Indonesia

Sandstone facies distribution of potential reservoirs within lower talang akar formation in ‘Jasmine’ Field, Northwest Java Basin

Abstract ‘Jasmine’ Field is an oil and gas field in the working area of a national oil company located in Northwest Java Basin. Lower Talang Akar Formation is considered to have one of the largest sandstone reservoir potentials in Northwest Java Basin based on earlier studies. This study aims to determine the depositional environment of Lower Talang Akar Formation and get the sandstone facies distribution of potential reservoirs in ‘Jasmine’ Field, as an early guideline for future production and drilling in new points within the field. Interpretation of this study was carried out by integrating 13 well log data, 13 well report data, 2 core data, and 1 3D seismic cube. Well log, well report, and core data were integrated to interpretate lithofacies, electrofacies, depositional environment, and stratigraphy sequence analysis. Sandstone body width vs. thickness ratio determination, fluid contact analysis, and RMS seismic attribute method were then carried to obtain the sandstone facies distribution of potential reservoir intervals of Talang Akar Formation in ‘Jasmine’ Field. The results shows that there are 2 intervals that has thick sandstone bodies as potential reservoirs in this study. The deposition direction for both Sandstone Body-A group and Sandstone Body-B group intervals is northeast-southwest. Sandstone Body-A group facies distribution is controlled by a braided river depositional environment and is distributed in the west side of the field. In the other hand, Sandstone Body-B group facies distribution is controlled by a distributary channel system in a lower delta-plain depositional environment and is distributed in both the west side and east side of the field.

Assessing Fracture Intensity and Petrophysical Properties in the Jatibarang Formation's Volcanic Reservoirs, North West Java Basin

Assessing Fracture Intensity and Petrophysical Properties in the Jatibarang Formation's Volcanic Reservoirs, North West Java Basin

Fluctuations and disparity in broiler and carcass price before during and after covid-19 pandemic in Indonesia

This study aims to analyze fluctuations and disparity in broiler and carcass prices before, during, and after COVID-19 pandemic in five broiler-producing regions in Indonesia, including North Sumatra, West Java, Central Java, East Java, and South Sulawesi. Weekly data series were used to analyze fluctuations and disparity before (2017–February 2020), during (March 2020–2022), and after (January–June 2023) COVID-19 pandemic. Furthermore, Coefficient of variation (CV) and convergence models were also used during the analysis. The results showed that broiler price fluctuations in the five study areas were categorized as “medium” before and during pandemic. After pandemic, the majority of the areas were in the “low” category, except for South Sulawesi province, where CV was 10.02%. Carcass price fluctuations were categorized as “low” and “moderate” before and during COVID-19 pandemic. After the viral outbreak, all the provinces investigated in this study were classified as “low”. This indicated that the variability in carcass price decreased across all provinces after pandemic. The coefficient value of β1 was less than 1 indicating that broiler and carcass price did not show significant disparity between regions at all periods. The primary drivers of fluctuations and disparity were related to production and availability factors, and the government played a role in maintaining stability in producing areas.

Preliminary corrosion prevention of microbiologically induced corrosion in high producer main oil pipelines to hinder reoccurrence leak

Microbiologically induced corrosion (MIC) is a prominent issue in high-producer main oil lines (MOL) despite the stringent mechanical and chemical treatment due to Sulfate-reducing bacteria (SRB). Monthly corrosion monitoring shows the number of bacteria on the pig body and in seawater remains significant. The investigation corresponds with the dormancy and duplication of SRB retains in siloes due to uncontrolled parameters such as injection schedule and the ideal biocide dosage. While investigating and predicting the resistant bacteria that may threaten the pipeline is an attractive discussion, modelling the corrosion mitigation using a corrosion test is equally essential to predict the effectiveness of biocides. Biocide performance was evaluated in a few test solutions from two locations in one of the well-established oil company producers in northwest Java. The corresponding time-kill test using Tetrakis (hydroxymethyl) Phosphonium Sulfate (THPS) adheres to NACE TM- 0194 (2014) standard to obtain the optimum biocide dosing of the bacteria solution. Biofilm and micro-pitting were identified by evaluating the blank and 1000 μg/L 60% THPS solutions using a Scanning Electronic Microscope (SEM). Based on the time kill test, the inactive bacteria in dormancy after injection 500 μg/L and 1000 μg/L THPS 60%. The wheel corrosion test shows ineffective injection increases chemical acidity and corrosion rate. The SEM result confirms the time-kill test and indicates the possible sessile bacteria and biotic pitting. This work exemplifies the comprehensive engagement between the field operation and experimental work to quicken the MIC analysis and recommend a viable strategy for the parameter field variation.

Comparison of Log and Empirical High Function Saturation and It’s Effect on Volumetric Calculations

This paper discusses the comparison of the Saturation Height Function between the saturation calculation method based on log data using various equations such as Archie, Indonesia and Dual Water with the empirical method which is popularly used in the oil and gas industry, namely the Cuddy method. The advantages and disadvantages of each method will be discussed. Each method of calculating saturation with log data is compared with the Cuddy method to get an idea of ​​which geological conditions are most suitable for the Cuddy method. This study was carried out by modeling the well oil saturation height profile from an Oligocene well from the North West Java Basin of Indonesia. This well was chosen because it did not have complete data, only a series of Electrical logs and no conventional core and SCAL data. Apart from comparing each method on the well, this paper also compares volumetric calculations based on the resulting oil saturation height profile model.By comparing the results of each volumetric calculation, we can find out which method gives better results so that without core data we can still make STOIIP predictions quite validly.

Magmatic Evolution and Plumbing System of Gede-Salak Volcano, Banten, Indonesia

The study of individual volcanoes in northwest Java has been largely overlooked. In this study, an investigation of the magma evolution and plumbing system of Gede-Salak Volcano was conducted. A geological survey determined the lava unit and volcanism. The whole-rock geochemistry is utilized to determine the magma type and evolution. Mineral chemistry based on microprobe analysis revealed the magmatic process and phenocryst origin. Geothermobarometry is employed to estimate the temperature and pressure. The volcanism comprised the eruption of lava flows, sector collapse, and the eruption of lava domes. The magma evolution consists of two magma types: type A (lava flow and peripheral dome) and type B (summit dome). The processes identified are amphibole fractionation, magma mixing, and crust assimilation. Phenocryst textures and chemistry implied open-system processes inthe plumbing system involving three magma series, namely the felsic, intermediate, and mafic series. Magma type A resulted from multiple mafic recharges on the felsic series, while type B resulted from the mixing of intermediate and mafic series. The felsic and intermediate phenocryst crystallization occurred at 933-948°C and 1010-1011°C in the mid-crust at 14 km to 17 km depth. Meanwhile, the mafic series reside in the lower crust at 21 km depth and of 1065-1087°C temperature. Keywords: Gede-Salak, magma evolution, magma plumbing, geothermobarometry, mineral chemistry

Host range of three isolates of papaya ringspot virus (PRSV) found in North Sumatera and West Java

Papaya ringspot virus (PRSV) isolates collectd from North Sumatera and West Java were evaluated for host range using mechanical inoculation. PRSV is one of the dangerous diseases in papaya plants in Indonesia reported to have a limited host range and caused symptom variation on plants. The study aim to determine the host range of three PRSV isolates from North Sumatera and West Java to several crops. Incidence of PRSV symptoms on plants was observed by morphological characterization. The experimental results showed that two PRSV isolates from Medan Ampelas and Deli Serdang North Sumatera, and Cibinong West Java isolates were pathogenic and caused systemic symptoms to Carica papaya cv. MD (Caricacea), melon (C. melo) and bitter melon (Momordica charantia). The symptom of infected papaya by the three isolates are vein clearing, mosaic on leaves, leaf blanching, wilt, and mottle on leaf lamina. The isolates caused asymptomatic to eggplant (Solanum melongena) and choy sum (Brassica rapa), asparagus bean (Vigna unguiculata), tobacco (Nicotiana tabacum), and tomato (Solanum lycopersicum syn. lycopersicum esculentum). Melon plants showed symptoms of vein clearing and lamina blanching by Medan Ampelas, and Cibinong isolates respectively, and bitter melon showed symptoms of vein clearing and leaf malformation, and mottle by isolate of Medan Ampelas and Cibinong respectively. The two plant species display asymptomatic by isolate of Deli Serdang. Isolate of Deli serdang has the potential to be a mild strain of PRSV. Complete characterization of mild strains of plant virus through molecular technology approaches can enrich understanding of the potential of these organisms for cross-protection.

Lithofacies Interpretation Of Sediment Rocks In The Cipamingkis River Outcrop, Jonggol Area, Bogor District, West Java

This research aims to study sedimentary structures and determine the depositional environment of the outcrop in the Cipamingkis River, Jonggol area, Bogor Regency, West Java. The method in this study includes literature studies, field surveys, data interpretation, and facies analysis. The result shows the outcrop in the Cimangkis River can be divided into four (4) sedimentation sequences unit: Claystone Unit (Sequence 1), Limestone/Calsirudit Unit (Sequence 2), Limestone/calcarenite-Calcilutite Unit (Sequence 3), Mudstone/ Calsilutite Unit (Sequence 4). Based on the depositional environment analysis, this outcrop displays characteristics of a shallow marine environment. The Interpretation of facies from outcrops can be used as a reservoir analog and can support subsurface interpretation in the Northwest Java Basin

ANALISIS PERFORMA DIAMOND BIT DAN CONE BIT DENGAN MENGGUNAKAN METODE SPECIFIC ENERGY DI LAPANGAN JS SUMUR P2 DAN Q5 PT. PERTAMINA ASSET 3

The JS field in the North West Java Basin consists of 6 formations, namely Jatibarang, Talang Akar, Baturaja, Upper Cibulakan, Parigi, Cisubuh formations. The formation that is proven to have the potential to develop is the Middle Cibulakan formation. The formations have different hardness characteristics and certainly require different bits to penetrate the specified formation.From these indications, the performance of the drill bits used in the JS field will be analyzed, namely the P2 and Q5 wells. In the P2 well, the performance of the Diamond Bit drill bit at a depth of 0-2500 ft is analyzed. While the Q5 well uses a Roller Cone Bit drill bit at a depth of 0-3000ft. The method used is Specific energy.From the bit performance analysis, the rocks penetrated are from the softest, medium to hard. For Diamond Bit on runs 1-2 show a low value because the penetrated formation is still soft, on runs 3-5 begin to show an increase in SE value because the formation is medium. And on runs 6-8 show a high value because the formation has started to hard. As for the Roller Cone Bit in runs 1-2 shows a low value because the formation is relatively soft, there is an increase in runs 3-5 although there is a decrease in the 4th run due to formation incompactness. However, the 6-8 runs show an increase again because the penetrated formation is classified as hard. So it can be concluded that the rock formation factor can affect the performance of the drill bit.

CCUS-EOR Optimization to Achieve Zero Emission Program Targets in Northwest Java Basin

CCUS-EOR Optimization to Achieve Zero Emission Program Targets in Northwest Java Basin

Healthy Family Indicator in Barombong Village Tamalate District Makassar City

The government created the Healthy Family Indicators (IKS) program to assess or measure the level of progress of healthy families in each region. The Healthy Family Index (IKS) is a calculation of the twelve healthy family indicators for each family whose size ranges from 0 to 1. Families classified as healthy families are families with IKS > 0.8. IKS achievements are still relatively low for several regions in Indonesia, the results of IKS calculations from the 9 initial target provinces namely North Sumatra, South Sumatra, Lampung, DKI Jakarta, West Java, Central Java, East Java, Banten and South Sulawesi as of June 8 2017 obtained families who have IKS above 0.8 of 0.163 out of 570,326 families (Pusdatin, 2018). This study aims to describe the family indicators and index of healthy families in Barombong Village. The type of research used is quantitative descriptive research. Based on the results of the study showed that the healthy family index of 95 families consisted of 32 (33.7%) healthy families, 27 (28.4%) pre-healthy families and 36 (37.9%) unhealthy families. Meanwhile, 62 families (69.7%) participated in the Family Planning program, 6 families (75%) gave birth to mothers, 5 families (83.3%) babies received complete basic immunization, babies received exclusive breastfeeding there were 5 families (55.6%), Toddlers who received growth monitoring there were 10 families (62.5%), there were no pulmonary TB sufferers in 95 families (100%), Patients with hypertension who received regular treatment there were 3 families (50%) ), no mental disorders were found in 95 families (100%), 68 families (71.6%) smoked family members, 75 families (78.9%) had become JKN members, 95 families (100%) these already have clean water facilities, and 95 families (100%) already use healthy latrines. It is recommended that the local puskesmas make policies and efforts to increase family planning participation so that couples of reproductive age (PUS) realize that participating in family planning is to limit birth rates in the long term, make regulations and make appeals not to smoke, especially for areas that are close to members' activities. family.

Laying hens breeding's contribution to Indonesia's small-scale farmers' economic income - A Review

This paper reviews the development of regional laying hen farming in Indonesia in an illustrative way, in addition to the economic contribution made by small farmers to the development of the country through the production of laying hens on their modest holdings and their ability to support self-sufficiency. By achieving the largest possible production of eggs and chickens, the aim is to determine the contribution of laying hens to the national economy and the self-sufficiency of small farmers. The study focused on small farmers in the regions of North Sumatra, West Java, Central Java, East Java, South Sulawesi, and West Nusatenggara. It was concluded from this study that the small farmers who had little capital for raising laying hens benefited from the net present value of IDR 36,213,611 in their favor. 4,233 heads were used, resulting in an average of 5,644 kg of eggs per month, IDR 98,996,826,00 in average monthly revenue, and IDR 16,418,183 in net profit. This meant that the laying hens’ business was profitable for both community and personal gain.

SPATIOTEMPORAL DISTRIBUTION OF THE CONGLOMERATE RESERVOIR JATIBARANG FORMATION, MELANDONG FIELD, NORTH-WEST JAVA BASIN, INDONESIA

Subsurface mapping of the distribution of the reservoir is essential to be conducted in order to minimize many risks such as financial losses and also to increase profit from hydrocarbon production. This research was conducted on the Jatibarang conglomerate reservoir in Melandong Field, North West Java Basin, Indonesia. There are three objectives of this study which are to perform elastic impedance (EI) seismic inversion using available 3D seismic data, to determine the most suitable elastic impedance angle for the data, and to map spatiotemporal distribution of the Jatibarang Formation reservoir in the Melandong field, North West Java basin, Indonesia. EI inversion was selected for this study using the inversion angle ranging from the near stack (5º-15º) to the far stack (20º-30º). Results from this study show that EI seismic inversion can help in detecting the distribution of the lithology and hydrocarbon within the target zone. Angle 5º is considered as the best EI angle for the studied data as indicated by a correlation value of 0.65. Moreover, EI angles 15º and 10º are less reliable as shown by their correlation value of 0.6 and 0.56, respectively. These results are expected to provide some new insights into the distribution of the Jatibarang reservoir, and help in exploration, exploitation, and development of oil and gas fields in Melandong Field, North West Java Basin, Indonesia.

Integrating Petrophysical Analysis and Seismic Interpretation for Oil and Gas Reserves Estimation in “TAU” Field, Jatibarang Sub–Basin, North West Java Basin

The focus of the study is the North West Java Basin, specifically the Jatibarang Sub Basin within it. The research aims to identify new potential areas for hydrocarbon reserves using seismic interpretation, and tetrophysical analysis, also calculate the volume of reserves in those areas. According to the study, 2 potential areas for hydrocarbon reserves were identified in the Parigi Formation, 2 were identified in the Baturaja Formation, 3 were identified in the Talang Akar Formation, and 1 was identified in the Jatibarang Formation. No new potential areas were discovered in the Cibulakan Formation. The study used petrophysical interpretation of six wells to determine the average values of shale volume (9.57% to 29.87%), effective porosity (19.45% to 21.67%), and water saturation (69.73% to 93.50%) for each potential zone. The TAU-5 well in the Baturaja Formation (Zone 1, Zone 2, Zone 3, and Zone 4) was determined to be the most economically viable zone for production based on the values of shale volume, porosity, and water saturation. The volume of hydrocarbon reserves in the BR-1 potential zone was calculated to be 182.741281 MBO in OOIP and 177.85122 BCF in OGIP. The BR-2 potential zone had an OOIP value of 1,197.534148 MBO and an OGIP of 1165.488764 BCF.

Productivity and Environmental Friendliness Evaluation of Circular Net Fishing Gear in West Java

Based on the mission of the Ministry of Marine Affairs and Fisheries (MMAF), namely about sustainability where one of the focuses of realization efforts carried out is to improve the sustainability of capture and aquaculture businesses. The potential of ??ng waters can be developed including ?d?l?h d? freshwater waters (rivers, lakes, ponds), brackish waters (ponds) and marine waters (beaches and high seas). The noble mission is also outlined in the implementation of the 6th nawacita, namely fisheries resource management directed through sub-agendas: Acceleration of national economic growth through increasing fishery products, namely through improving the quality, added value and innovation of fisheries technology, improving the quality of fishery facilities and infrastructure, improving fisheries governance and sustainable fisheries management. This study aims to analyze the diversity of the types of circular net fishing equipment in West Java Province, especially the marine waters of the North West Java region, the productivity value of ring nets based on the type and classification of fishing vessel sizes authorized by the Provincial Government, and productivity and level of environmental friendliness of ring nets used in West Java Province, especially the sea waters of the northern region of West Java. The study areas studied were the northern coastal areas in West Java, namely Bekasi Regency, Karawang Regency, Subang Regency, Indramayu Regency, and Cirebon Regency. This activity was carried out for one month, namely July 2022.

Mining Grouping Biopharmaceutical Plants in Indonesia Using the K-Means Algorithm: Application of Data Mining in Production

There are various types of biopharmaceutical plants or medicinal plants in Indonesia, including ginger, galangal, kencur, turmeric, lempuyang and curcuma aeruginosa whose production is widespread in various provinces in Indonesia. reached 160 million USD annually. Then the application of data mining used to classify biopharmaceutical plant production data in Indonesia from this study resulted in 2 clusters namely cluster 0 which in this cluster is a cluster with low production value of biopharmaceutical plants in Indonesia, namely the Provinces of West Sumatra, Riau, Jambi, South Sumatra, Bengkulu, Lampung, Kep. Bangka Belitung, Kep. Riau, DKI Jakarta, DI Yogyakarta, Banten, Bali, West Nusa Tenggara, East Nusa Tenggara, West Kalimantan, Central Kalimantan, South Kalimantan, East Kalimantan, North Kalimantan, Central Kalimantan, Southeast Sulawesi, Maluku, West Papua and Papua. While cluster 1 is the cluster where the production rate of biopharmaceutical plants is the highest in Indonesia, namely the Provinces of North Sumatra, West Java, Central Java, East Java and South Sulawesi. From the results that have been obtained, it is hoped that it will be useful for organizations, groups or individuals engaged in the biopharmaceutical plant sector so that they can review the existing deficiencies and can increase the production of biopharmaceutical plants in each province.

Determinants of Household Food Security during the COVID-19 Pandemic in Indonesia

The COVID-19 pandemic has impacted national and household food security in Indonesia. The objectives of this study were to: (1) identify the socio-economic characteristics of Indonesian households related to food security, (2) analyze the factors that have affected household food security during the COVID-19 pandemic, and (3) provide recommendations for improving programs to increase household food security. The study was conducted in eight provinces in Indonesia, namely North Sumatra, Lampung, West Java, Central Java, East Java, South Kalimantan, South Sulawesi, and West Nusa Tenggara. Data collection was carried out from April to July 2020. The results showed that 50.63% of the households surveyed were food insecure. The binary-logit-regression-model results showed that variables of gender, age, family size, education, occupation, income, and expenditure on food had a significant effect on household food security status. Variables that had a positive influence on household food security were gender, age, education, occupation, income, and food expenditure. On the other hand, household size had a negative effect on household food security. The marginal effect of gender was 0.035, age was 0.058, education was 0.192, type of work was 0.016, income level was 0.521, and food expenditure was 0.114, while for the number of family members the marginal effect was 15.725. This study was conducted in eight provinces affected by COVID-19, using the Household-Food- Insecurity-Access-Scale and binary-logit model approaches, which had never been performed before. Policy and program recommendations for increasing household food security in Indonesia are presented.

Deteksi Pola Sebaran Tumpahan Minyak (Oil Spill) Menggunakan Citra Sentinel-1A di Perairan Karawang

In recent years, oil spill accidents very often occur due to the development of sea transportation and oil exploitation. Increased exploitation of oil resources is a concern for oil spills that are very harmful to marine ecosystems. On July 12 2019, there was a well kick in the well reactivation YYA-1 owned by PT. Pertamina Hulu Energi work area Offshore North West Java (ONWJ) in Karawang Sea. The oil spill were spread up to Banten and continued to spread widely. Remote sensing is one of the methods that can be used to detect and monitor the oil spill by quickly viewing the location and spill points, and the pace and direction of the oil that can be utilized for cleaning. This research aims to determine the detection of oil spill using Sentinel-1A imagery and to determine oil spill patterns in Karawang Sea before spills occur until the well YYA-1 was closed that was on October 7 2019. This detection is done with adaptive threshold algorithm through Sentinel applications platform (SNAP). The results showed that oil spill has a trajectory spread pattern at the beginning of the spill which occur on July 18 2019. After July 18th, the spread pattern turned random and interrupted the spreading process. The spread has an estimated spread area of 145.85 km2. The spread of oil spill moved towards the northwest to the west approaching the coast and further away from the source of the spill, to Pandjang Island, Banten.

Effect of diagenetic events on limestone reservoir quality: Case study of Parigi formation, Northwest Java basin

Limestone is a sedimentary rock with high heterogeneity. This is triggered by diagenetic processes that affect the quality of limestone during its formation. The high uncertainty in limestone porosity values is also influenced by diagenetic processes. The Parigi Formation is a carbonate rock located in the Northwest Java Basin and has been proven to be a carbonate reservoir rock. Petrographic analysis was conducted to observe the appearance resulting from diagenetic processes. The studied area's limestone has two facies: clastic facies and reef facies. The limestone of clastic facies is white to greyish, consisting of skeletal fragments or shell fragments, with some places contains fragmented coral fragments. It is grain-supported, massive, poorly sorted, with fragment sizes ranging from 1mm-8mm and in some places 10cm-20cm. The reef facies of limestone are generally white to greyish colour, compact/massive, without cavities, and shows the body structure of coral/reef. The processes occurring in the Parigi Formation limestone, based on thin-section data, include cementation and neomorphism, which are commonly found in thin section LP 7 and LP 10. Cementation and neomorphism lead to a decrease in porosity in the limestone. Samples LP 1 - LP 5 show extensive dissolution, resulting in vuggy cavities/porosity. These limestone samples have high porosity values. The transformation of fossils into new crystals or recrystallization processes also reduces the limestone's porosity. Some samples also show that the cavities in the Parigi Formation limestone have been filled by calcite cements, thus closing the pores. This leads to poor quality limestone. In conclusion, the heterogeneous nature of limestone is significantly influenced by diagenetic processes. Petrographic analysis of the Parigi Formation limestone revealed the occurrence of cementation, neomorphism, dissolution, and recrystallization processes, all of which have implications for porosity and reservoir quality.