Proceedings of Indonesian Petroleum Association, 46th Annual Convention & Exhibition, 2022最新文献

{"title":"Depositional Model of Muda Formation, East Natuna Basin","authors":"V.B Indranadi","doi":"10.29118/ipa22-g-295","DOIUrl":"https://doi.org/10.29118/ipa22-g-295","url":null,"abstract":"The current exploration in the Natuna Basin is focusing on the Muda Formation, as there have been shallow gas discoveries such as Dara and Tuna in the East Natuna Basin as well as Kaci and Mako in the West Natuna Basin. Unfortunately, only limited studies or publications are available because the Muda Formation has not been the main exploration target in the past. This study attempts to build a series of regional Gross Depositional Environment (GDE) of the Muda Formation in the southeastern part of the East Natuna Basin that has never been published before. The present-day bathymetric and ancient river network maps of the Natuna region were integrated into the interpretation to complement limited seismic and well data. The present-day bathymetric map was adjusted to the Haq’s eustatic sea level curve and biostratigraphic data to depict ancient water depth, shoreline, and basin configuration maps. Meanwhile, the ancient river network map from Molengraaff (1921) was also used to establish the locus of the sediment influx into the basin. The depositional history of the Muda Formation began in the Late Miocene until the present-day during a period of tectonic quiescence. The continental slope gradient in the Natuna region was very gentle and hence the sedimentary process in the basin was strongly controlled by sea level changes. The Muda Formation has been subsequently divided into three sequences based on the eustatic sea level curve by Haq et al (1987), namely: the Lower Muda, Middle Muda, and Upper Muda sequences. Meanwhile, the paleobathymetric map and paleoriver network modeling suggests that there were two major estuaries, namely Maludam and Molengraaff that were influenced by tidal-dominated processes during the deposition of the Muda interval in the nearshore area. The Lower Muda deposition began in the Late Miocene, following the Middle Miocene tectonic uplift in the Natuna region. Its paleobathymetry is interpreted to be approximately 50 meters deeper than the present-day bathymetry. The sediment provenance of Lower Muda derived from onshore NW Borneo through the Maludam Estuary in the southeastern part of the basin. The Middle Muda Sequence marked a maximum transgressive event during the Early Pliocene period. The interpreted Middle Muda water depth was approximately 80 meters deeper than the present-day water depth due to global sea level rise. The Upper Muda Sequence was deposited during Plio-Pleistocene. A rapid and significant change of water depth, shoreline and sediment influx were controlled by the sea level change due to glaciation during the Ice Age. Its main sediment source was coming from Sumatera through the Molengraaff River toward estuary in the southwestern part of the basin during events when sea level dropped and alternately shifted through Maludam River and estuary during interglacial. This study proves that the eustatic curve, ancient river network and present-day water depth maps are valuable data to interpret the depos","PeriodicalId":442360,"journal":{"name":"Proceedings of Indonesian Petroleum Association, 46th Annual Convention & Exhibition, 2022","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121191836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An Effective Method to Improve Borehole Tortuosity and Tripping Out Speed in Interbedded Lithology Using Dual Cutting Eccentric Reamer in Swamp Drilling Operation","authors":"B. K. Yuda","doi":"10.29118/ipa22-e-48","DOIUrl":"https://doi.org/10.29118/ipa22-e-48","url":null,"abstract":"Handil field in Mahakam block has crowded wells and scattered reservoirs in which typical 3D trajectory such as S-type trajectory need to be done to respect anti-collision with surrounding wells and optimize reservoir coverage in a single line trajectory. However, a typical S-type trajectory causes a high stick-slip issue to arise and induces bad hole quality. In some wells, this potentially leads to additional time for dedicated wiper trips, a longer time during pull-out Bottom Hole Assembly (BHA), more usage of lubricant mud additives, and ROP reduction. As a result, a longer rig time would have occurred leading to a tight margin for a well to be produced economically. A technology called Dual Cutting Eccentric Reamer (DCER) could help to tackle the problem mentioned. It is a typical stabilizer BHA which has eccentric dual cutting structures that allows the tools to enlarge the hole then it passes through in two directions both when up-reaming and down-reaming. As a result, the tool helps improve hole quality as the tool also helps trim the ledges produced when drilling the hole. This paper is introduced to analyze the benefits of the reamer and its opportunity for future development in swamp drilling operations. The tool was applied during drilling on an 8-1/2” section. One of the challenges during drilling this S-Type trajectory was to minimize the difficulty during pull-out BHA that may lead to additional pull-out duration as well as the rig time or even dedicated wiper trip. The result of reamer utilization shows that pull-out BHA speed could be improved to 196 m/hr from 82 m/hr or 139% improvement compared with typical offset well. Furthermore, combined with good proper bit design and BHA configuration, the stick-slip issue could be minimized while ROP could be increased up to 9% compared to conventional well with S-type trajectory on the first trial. This utilization has been successfully implemented without any safety incidents and related Non-Productive Time (NPT). This positive result leads us to open the opportunity for future drilling campaigns in swamp asset such as DCER as the standard BHA configuration especially for S-type trajectory.","PeriodicalId":442360,"journal":{"name":"Proceedings of Indonesian Petroleum Association, 46th Annual Convention & Exhibition, 2022","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122584033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing Karstified Carbonate Characterization Through Focused Seismic Reprocessing and Machine Learning Utilization in Ubadari Field","authors":"M. Sahidu","doi":"10.29118/ipa22-g-154","DOIUrl":"https://doi.org/10.29118/ipa22-g-154","url":null,"abstract":"Ubadari is an undeveloped gas field in Bintuni Bay (West Papua, Indonesia) about 70km west of the Tangguh LNG plant. Seismic reprocessing (2015 and 2018) and appraisal well results (2019) elevated the field from option to the main project of Tangguh Expansion phase 2. The development plan will require several development wells from one or two platforms and a dedicated pipeline to supply gas to the 3rd Tangguh LNG train. The previous seismic reprocessing projects in Ubadari were focused on improving the reservoir image and the imaging in the overlying karstified carbonate remained suboptimal. Given the magnitude of drilling problems associated with this karstified Faumai formation and the role of seismic data in identifying the karst features (Birt, 2015; Riangguna, 2016; Birt, 2019), a seismic reprocessing with the focus on the overburden was required. bp completed the latest Ubadari seismic reprocessing in 2021 to identify the overburden drilling hazards that may impact the platform numbers and location. The seismic reprocessing resulted in step improvements of the overburden imaging although it was still highly masked by the karsts. Therefore, seismic attributes using the rapid interpretation Machine Learning-based tools were utilized to remove interpretation biases and improve the confidence level. The major faults in the carbonate can now be extracted and identified as having interaction with the older fault system on the reservoir level. The faults also formed a long span of collapse system on the very shallow carbonate section. The typical karst system in Tangguh (known as discrete circular bright troughs amplitude features) was also identified along or near the faults. This robust overburden characterization and drilling hazards assessment were delivered on time to be part of key consideration in the screening and optimization of the Ubadari future platform location for the TEP phase 2 project.","PeriodicalId":442360,"journal":{"name":"Proceedings of Indonesian Petroleum Association, 46th Annual Convention & Exhibition, 2022","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123985381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Gas Hydrate Resources SWOT in Indonesia","authors":"G. Fatih","doi":"10.29118/ipa22-sg-123","DOIUrl":"https://doi.org/10.29118/ipa22-sg-123","url":null,"abstract":"Gas hydrates are abundantly found in the permafrost of the northernmost part of the earth, in the deep ocean, and in fault zones. More than 50% of the world's carbon reserves are stored in the form of gas hydrates. Indonesia has an estimated gas hydrate reserve of 850TCF. With a large enough amount, these unconventional oil and gas resources can be seen as potential energy reserves. Even so, the challenges and shortcomings of gas hydrate production need to be studied further. Studying gas hydrate SWOT (Strength, Weakness, Opportunity, Threat) may influence the policy making. This study employs SWOT analysis and firstly, the estimation of Indonesia's gas hydrate reserves in various basins from previous studies is considered a Strength. Environmental issues in the form of global warming and a history of leakage from existing production need to be considered as a Weakness. The physical characteristics of gas hydrates can make it easy to identify from the seismic section and is considered an Opportunity. Production challenges from the location and the possibility of seafloor subsidence can be a Threat. Various points from each of these SWOT parameters can be used as a reference for finding solutions to overcome deficiencies and maximize existing potential in order to maintain national energy needs.","PeriodicalId":442360,"journal":{"name":"Proceedings of Indonesian Petroleum Association, 46th Annual Convention & Exhibition, 2022","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128682385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Developing Production Operators Capability With Integrated Competency Development Program (“Intercom”) in PT Pertamina EP","authors":"C. Nuraisyiah","doi":"10.29118/ipa22-o-92","DOIUrl":"https://doi.org/10.29118/ipa22-o-92","url":null,"abstract":"This paper discusses the integrated competency development of Operators in the Production Operations Function at Pertamina EP. There are several challenges to improve competences which require an integrated approach towards integrated competency development. Integrated Competency Development aims to become the competency standard for Production Operation Function Operators, competency assessment through coaching, training and upskilling, certification, and program monitoring through a dashboard that can be accessed via the web. The implementation of integrated competency development concept consists of 10 gradual and simultaneous. After implementation, Integrated Competency Development can improve operator competency development in the following aspects of Quality & Quantity achievement; 100% in Upskilling Quantity Accounting System, 100% in Upskilling Coach, 92% in Mandatory operator Certification, 100% in Coaching Workbook implementation, Cost Savings of 330-million-rupiah, availability of Integrated Competency Development monitoring dashboard. “Integrated Competency Development” is an effective tool to help management and company to develop better human resource quality, in a very short time and also at low cost.","PeriodicalId":442360,"journal":{"name":"Proceedings of Indonesian Petroleum Association, 46th Annual Convention & Exhibition, 2022","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126983324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fuel Gas System Improvement and Diesel Fuel Usage Optimization","authors":"N. S. Huang","doi":"10.29118/ipa22-f-167","DOIUrl":"https://doi.org/10.29118/ipa22-f-167","url":null,"abstract":"Six dual fuel Gas Turbine Generators (GTG) are used to generate power in the Banyu Urip oil production facility. The fuel gas system started to experience multiple challenges starting from unreliable Fuel Gas Compressor (FGC), fuel gas valve problem, and off-spec fuel gas due to scale formation at tube-bundle of Acid Gas Removal Unit Wet Surface Air Cooler (AGRU WSAC). Those multiple issues in the fuel gas system caused frequent use diesel fuel for GTG thereby increasing GTG’s operation cost. This paper shares how an integrated approach can deliver significant diesel fuel reductions by thorough surveillance, improving operational procedures and eliminating reliability issues. Root cause analysis was carried out on each issue that caused an upset in the fuel gas system, afterwards action items were assigned to several departments. With excellent collaboration between Engineering, Operations, and Maintenance, the improvement plan was successful. Our result shows a nearly 50% reduction in diesel fuel consumption in 2021 compared to the previous year.","PeriodicalId":442360,"journal":{"name":"Proceedings of Indonesian Petroleum Association, 46th Annual Convention & Exhibition, 2022","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126790455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Petrophysical Analysis Using Deterministic and Probabilistic Methods in Low Resistivity Zone of Gumai and Talang Akar Formations in Jambi Subbasin South Sumatra","authors":"K. Khatimah","doi":"10.29118/ipa22-sg-115","DOIUrl":"https://doi.org/10.29118/ipa22-sg-115","url":null,"abstract":"The South Sumatra Basin is the most productive hydrocarbons producer within the back-arc basin on the east coast of Sumatra. To maintain a balanced supply and demand, hydrocarbon findings are optimized in zones previously not considered prospective, known as low resistivity reservoirs. Zones of interest to be studied are chosen based on their hydrocarbon shows in mud logs but with wireline log resistivity of less than 5 Ωm. The research will analyze core data from petrography, X-Ray Diffraction (XRD), and Scanning Electron Microscope (SEM) to find the causes of low resistivity. In addition, the applications of deterministic and probabilistic methods are compared to identify petrophysical parameters, namely shale volume (Vsh) by the Stieber method, porosity using neutron-density method, and water saturation determined by the Indonesian method. Results from this research are also matched with routine core analysis, mud log, and drill stem test data, indicating that the low resistivity in prospective zones is due to the presence of clay minerals composed of kaolinite, illite, and chlorite. Formation evaluation from well data estimates for shale volume of 7.85 – 37.8%, porosity of 18.22 – 23.08%, and medium water saturation of 38.68 – 52.78%. In conclusion, by combining core analysis and petrophysical evaluation, this interval was improved as potential reservoir zones and pay zone. The probabilistic method is considered more effective compared to the deterministic method, because it can construct multi-mineral and multi-fluid from several lithologies and carry out two stages of validation, from core and statistics.","PeriodicalId":442360,"journal":{"name":"Proceedings of Indonesian Petroleum Association, 46th Annual Convention & Exhibition, 2022","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126708587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Machine Learning and Deep Learning for Digitizing Scanned Images of Seismic Reflection Data","authors":"A. Abdullah","doi":"10.29118/ipa22-g-99","DOIUrl":"https://doi.org/10.29118/ipa22-g-99","url":null,"abstract":"We present the use of Machine Learning algorithm of K-Nearest Neighbors (KNN) and Deep Learning algorithm of Artificial Neural Network for converting scanned images of seismic reflection data into digital seismic format. Digital seismic data format provides more flexibility for users to implement seismic processing algorithms like de-noising, enhancement and converting it into standard format, namely SEGY for further analysis such as seismic interpretation and seismic attributes generation. Varieties of seismic image in color density representation with different color maps and conventional wiggle display have been tested. Digitizing color density image consists of three main steps: recognizing Red-Green-Blue (RGB) representation in each pixel, creating a look-up table of RGB amplitude and substitute the RGB with a color that falls within the color-scale's dynamic range. Meanwhile, the approach is slightly different for image with wiggles representation. Several images’ attributes such as gradients and edge gradients are generated for better input uniqueness against known target amplitudes during model establishment. This pre-trained model is then used for predicting seismic amplitudes at specific pixel location in respect to a set of image attributes.The outcome of the conversion shows promising results. A qualitative interpretation for similarity check between input and output in terms of seismic events, horizon, faults, stratigraphy and other geological/geophysical features are used to validate the quality of digitized images.","PeriodicalId":442360,"journal":{"name":"Proceedings of Indonesian Petroleum Association, 46th Annual Convention & Exhibition, 2022","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116923803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"De-Risking Subsurface Uncertainties in Static Model Workflow for Ngimbang Carbonate Build-Up in Recently Discovered Field Located in North Madura II Block, Indonesia","authors":"Ahmad Ibrahim","doi":"10.29118/ipa22-g-248","DOIUrl":"https://doi.org/10.29118/ipa22-g-248","url":null,"abstract":"EJ-7 field is a green field located about 65 km NE of Surabaya in the offshore Northeast Java Basin in water depth of about 25m. EJ-7 was drilled and tested oil in Ngimbang Carbonate. There was no wireline logging data acquired successfully from the reservoir as the operation encountered total losses. Although the reservoirs are generally of good quality, it remains a challenge to capture the uncertainties in the static model due to the limited information available, especially from wells and seismic data. The integration of log data, geology and geophysical (G&G) interpretation and pressure analysis are the key factors to comprehend and to reduce the uncertainties, especially in fluid contact definition, which will give significant impact to resource estimation. Detail static modeling techniques and methodologies were applied to address and mitigate the uncertainties in EJ-7 Field. Valuable information from logs, seismic, regional sedimentology study and pressure analysis were integrated into the static model. The robust workflow was designed to capture the subsurface uncertainties, adopting the latest machine learning and a prudent selection of P10, P50 and P90 scenarios. Ultimately, the probable property maps of P90, P50 and P10 were utilized for forecasting as input to the numerical flow simulation to model the dynamic behavior of the reservoir, optimize the number of well count for development, and calculate the overall project economic value. Moreover, a seamless collaborative work with a third-party study also provided more constructive work to mitigate all the uncertainties through optimizing the well locations and the development concept for EJ-7 Field.","PeriodicalId":442360,"journal":{"name":"Proceedings of Indonesian Petroleum Association, 46th Annual Convention & Exhibition, 2022","volume":"15 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114125965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Deep Marine Reservoir Analog From Semilir Formation Outcrop Data in Ngoro-Oro Area, Gunungkidul, Indonesia","authors":"J.E Ardine","doi":"10.29118/ipa22-sg-98","DOIUrl":"https://doi.org/10.29118/ipa22-sg-98","url":null,"abstract":"A deep marine reservoir is unique since it has complex lithology that affects the reservoir quality. The turbidite deposit, which is one of deep marine reservoir, is a fascinating research subject. It is commonly found in the subsurface as petroleum reservoirs. As a reservoir, it is essential to understand the character of the turbidite deposits qualitatively and quantitatively. The Miocene Semilir Formation is a magnificent model of an epiclastic deep marine sequence outcropped in the southern mountain area of Yogyakarta. This study aims to build the analogy model and characterize the epiclastic turbidite deposits as reservoir rock based on petrology and petrography data. Generally, the Early Miocene Semilir Formation in the study area is characterized by sandstone, tuff, shale, and breccia which are recognized as classical turbidite facies in the form of Ta, Tb, Tc, Td (Bouma, 1962) and coarse-grained turbidite facies in the form of R1, R2, R3, S1, S2 (Lowe, 1982). Based on porosity calculation, R1 and Ta facies have good porosity hence it may have high potential as hydrocarbon reservoirs. Directional fallout sedimentation mechanism and low tuff percentage are the main controlling factors in deep marine reservoir properties.","PeriodicalId":442360,"journal":{"name":"Proceedings of Indonesian Petroleum Association, 46th Annual Convention & Exhibition, 2022","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114825867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}