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

{"title":"Seismic Attributes Application in Horizontal Drilling of Gas-Filled Carbonate Reservoir","authors":"P.A Adriani","doi":"10.29118/ipa22-g-304","DOIUrl":"https://doi.org/10.29118/ipa22-g-304","url":null,"abstract":"Understanding the heterogeneous nature of carbonates in oil & gas remains a challenge even in mature fields. In the development stage of carbonate fields, it is critical to have effective well trajectories and placements to achieve optimum production. Seismic data, which carry key information on rock properties and hydrocarbon fluid presence, should be heavily utilized to optimize reservoir penetration to target and achieve the desired outcome. In this paper, seismic amplitudes and acoustic impedance are visualized as powerful tools to recognize porous reservoir sections in gas-filled massive carbonate build-up to direct well trajectory to reservoir sweet spots in horizontal drilling. A horizontal infill well was proposed to further develop the mature carbonate field in offshore North Madura, targeting the Kujung-I reservoir. The well was designed to have a horizontal section in the carbonate reservoir target to optimize the gas production rate. However, due to the prognosed low contrast in the thick and clean carbonate that was initially thought to be of a homogenous character, the geo-steering tool originally planned to guide the horizontal well section was not deployed. Therefore, the drilling campaign was dominantly guided by the seismic analysis adjacent to all available real-time logging data. Seismic qualitative and quantitative approaches were conducted to observe the relationship between seismic and reservoir properties in the offshore North Madura carbonate field. Qualitatively, the DSTs and log data achieved a good correlation with the seismic bright spot and were further confirmed throughout the study by the results of Simultaneous Seismic Inversion. Moreover, well sensitivity analysis indicated that the Kujung-I reservoir had a good porosity trend with respect to the Acoustic Impedance (Inverted Zp). As a result, through the application of seismic attribute analysis in conjunction with Seismic Inversion and available real-time logging data, the well successfully reached TD in the targeted zone. Due to the horizontal section having penetrated and landed in the Kujung-1 section with good reservoir properties guided by the seismic attribute, the well achieved high production flow rate.","PeriodicalId":442360,"journal":{"name":"Proceedings of Indonesian Petroleum Association, 46th Annual Convention & Exhibition, 2022","volume":"23 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":"132968493","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":"Increasing The Resolution of Seismic Imaging With Spectral Blueing, Spectral Decomposition RGB And HSV Blending to Delineate The Fluvial Facies on Fluvio Deltaic Environment","authors":"A. D. Maulana","doi":"10.29118/ipa22-g-117","DOIUrl":"https://doi.org/10.29118/ipa22-g-117","url":null,"abstract":"The common issue that arises in geological modeling is the limited ability of the data to describe the spatial and vertical circumstances of facies and subsurface sediment deposits. Vertically, well data is high-resolution data that can describe one-dimensional objects in detail. On the other hand, seismic data can describe three-dimensional conditions but has a resolution bandwidth that is distant below the well data. Therefore, this study offers an integration method that can increase the seismic frequency to approach the ideal frequency to separate geological facies events vertically and laterally. The method used is Spectral Blueing, which will then be visualized using RGB and HSV Blending from the input data in the form of Spectral Decomposition. Spectral Blueing aims to increase the dominance of Blue Spectrum by analyzing the slope spectrum of the well data, bandpassing, and analyzing the deconvolution operator. In this method, the spectrum of the well data is used to examine the slope of the blue spectrum component, which is absent in the seismic data. This process produces a deconvolution operator that plays a part in increasing the blue spectrum area. Thus, geological events in the red, green, and blue spectrum are not muted or dominant. The entire frequency range of seismic data can maximally indicate geological anomalies and separate thin layers. The results are then analyzed on the AOI Horizon for specific spectral decomposition. Using the Continuous Wavelet Transform (CWT) method, several seismic energy cubes from the spectral decomposition are generated. Specific frequencies include 34, 42, 56, 63, 75, and 80 Hz. Each of these specific spectra carries different geological information. The separation of these anomalies aims to obtain specific and accurate dominant frequencies in each formation. The six dominant frequencies obtained from the spectrogram analysis will be input parameters for the graphic visualization process using RGB and HSV blending. The RGB method will provide an overview of geological features, while the HSV method will produce visualizations that still show the energy effects of seismic data. Several combinations of color blending visualizations of six specific frequencies are used to map and define the distribution of geological event anomalies printed in real terms and printed in the form of shadows. It is recorded right in the formation and zone of interest. While printed in a shadow is a pseudo-event anomaly, noise, or multiple events that are also recorded not in the actual formation. The final result of this method is a facies model with a more reasonable level of confidence and has been filtered using geological and geophysical concepts based on seismic data with an even dominance in each frequency range. The characterizations of facies found using this method include channel sand, point bar and point bar scroll, overbank or floodplain, chute channel, and abandoned channel. The results have also been valida","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":"130988500","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":"The Flow Zone Indicator (FZI) and Pore Geometry Structure (PGS) Rock Typing Comparison to Maximize Permeability Estimation on Carbonate Reservoir, Case Study: Kais Formation, Bintuni Basin","authors":"F. R. Ramadhan","doi":"10.29118/ipa22-sg-138","DOIUrl":"https://doi.org/10.29118/ipa22-sg-138","url":null,"abstract":"Carbonate rock has high level of heterogeneity and it makes up the majority of reservoirs in the world, for example the Kais Formation reservoir. The heterogeneities of carbonate rock are influenced by mineral composition, diagenesis, and depositional environment. Those heterogeneities affect the permeability of the rock, so that it will produce a very high uncertainty in the formation evaluation process. The permeability value is one of the vital parameters in a reservoir, so it must be predicted with a high degree of accuracy. One of the ways is to characterize the reservoir using rock typing. Rock typing is performed in conventional coring data at1553 – 1738 feet MD), with 55 RCAL samples and capillary pressure (Pc). Rock typing begins by considering the geological features of the rock composition (lithology, colour, texture, mineral composition, diagenesis and depositional facies). Then the rock type Flow Zone Indicator (FZI) is obtained based on the calculation of the Rock Quality Index (RQI) and the normalization of the porosity value (ϕz), as well as rock type PGS which is used a comparison between pore structure and pore geometry. From those core analysis, there are with 6 rock types FZI, and with10 rock types PGS. The comparison of the predicted permeability values was carried out based on the equations from the rock typing results in each method. The permeability predictions using the FZI method showed a better level of relevance to the permeability values of the core data. In the un-cored well interval, cluster analysis was performed for rock typing which resulted in an undetailed rock type log as a calibration log for the Self Organizing Map (SOM) algorithm analysis, which produced a detailed rock type log, before re-doing the FZI analysis. The results of the estimated permeability (K) of FZI in the un-cored well intervals have correlation coefficient between 0.76 – 0.86 to the synthetic permeability log in the majority of available wells. New Rock Type (RT) for each well shows that RT-4 and RT-5 have fairly high value of flow units which indicates as good rock types in flowing fluids.","PeriodicalId":442360,"journal":{"name":"Proceedings of Indonesian Petroleum Association, 46th Annual Convention & Exhibition, 2022","volume":"124 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":"133292445","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":"New Attribute Energy Weighted AVO (EAVO) Application on The Acacia Bagus Structure, Jatibarang Field, North West Java Basin","authors":"A. Haikal","doi":"10.29118/ipa22-sg-122","DOIUrl":"https://doi.org/10.29118/ipa22-sg-122","url":null,"abstract":"A new attribute energy-weighted AVO (EAVO) is one of the derived attributes of AVO which is often used as an indicator of the presence of hydrocarbons and can be applied to pre-stack and post-stack seismic data. The main principle of this attribute is to increase the anomalous response associated with hydrocarbons while attenuating the seismic background around the anomaly. This advantage is not found in other types of attributes where almost all of the seismic attributes can only be used on one type of seismic data. This study aims to apply the EAVO attribute to pre-stack and post-stack seismic data in determining the distribution of hydrocarbons in the Acacia Bagus structure, Jatibarang Field, North West Java Basin. Pre-stack, post-stack, and Well A-01 seismic data are the data used in this study. First of all, a quick look interpretation of the well data is carried out to determine the target zone. After that, pre-conditioning gather, well seismic tie, horizon picking, and continued application of the EAVO attribute to each seismic data are carried out. Two targets are found in Cibulakan Formation (target A) and Baturaja Formation (target B), both comprised by limestone. There is a response in the form of peak amplitude on the data gather whose energy is getting weaker as the offset increases for both targets. Then for the stack data, the peak amplitude response is only found on target B. However, if one looks at the horizontal slice of the stack data, there is a high amplitude distribution in the north and south of the research zone for target A, as well as a distribution in the north of the research zone for target B.","PeriodicalId":442360,"journal":{"name":"Proceedings of Indonesian Petroleum Association, 46th Annual Convention & Exhibition, 2022","volume":"13 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":"124542929","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":"CO2 Injection and Production in Geothermal Reservoirs for Power Generation: Case Study From North Sumatra Basin of Possible Impacts of Scaling on Surface Facilities","authors":"N. Fitriani","doi":"10.29118/ipa22-g-187","DOIUrl":"https://doi.org/10.29118/ipa22-g-187","url":null,"abstract":"The increasing energy demand in Indonesia comes with a large amount of anthropogenic CO2 emission which Indonesia has committed to reduce by 29% in order to meet the carbon emission target according to the BaU scenario of Indonesia's NDC (Nationally Determined Contribution) by the year 2030. Indonesia has abundant geothermal energy potential and sources of anthropogenic carbon dioxide from various industries. Based on recent trends and the latest references, supercritical carbon dioxide (scCO2) is feasible to inject into geothermal reservoirs to scavenge heat, and then produced as a working fluid to generate electricity in a process called Enhanced Geothermal System (EGS). The complex CO2–induced geochemical reactions can cause a change in reservoir porosity and affect fluid flow and heat mining rate. In this study, a comprehensive investigation on geochemical interactions between CO2–water as well as conceptual facilities of CO2 turbine was conducted. A water scaling simulation model was built to simulate the geochemical reactions in surface facilities during the CO2–EGS process. Mineral composition from several wells were modeled to calculate Saturation Index (SI) as a parameter that would indicate whether the mineral would tend to dissolve or precipitate. The geochemical simulation showed that in a North Sumatra geothermal field tested using scCO2 as a working fluid, the presence of CO2 could change water properties ( pH and alkalinity )– which could then induce the precipitation of calcium carbonate, dolomite, and silicon dioxide. The concept of using carbon captured CO2 as a working fluid for geothermal powerplant is quite new and mineral scaling due injected CO2 is an aspect that needs to be further investigated.","PeriodicalId":442360,"journal":{"name":"Proceedings of Indonesian Petroleum Association, 46th Annual Convention & Exhibition, 2022","volume":"5 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":"116377334","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":"Lesson Learned From Static Model Uncertainty Analysis","authors":"I. Praja","doi":"10.29118/ipa22-g-223","DOIUrl":"https://doi.org/10.29118/ipa22-g-223","url":null,"abstract":"This paper documents lessons learned from conducting uncertainty analysis for 3D static modeling. Example cases, evaluation techniques and a proposed guideline are presented to resolve misconceptions in probabilistic studies. The technological advancements nowadays have allowed thorough probabilistic studies to be conducted. In most 3D static modeling software, a recorded 3D modeling workflow can be incorporated with various variables and run as an experimental design with several runs. However, the lack of transferred knowledge and publications regarding probabilistic guidelines has led to many inconsistencies, misconceptions, and confusion about the fundamentals, during designing, running, or post-run analysis. For example, during running analysis, the result is inconsistent between the field-level median model (P50) with zone-level median models. Later, this could raise a history matching issue since it obscures unreliable zone-level recovery factors due to overlapping in-place among tanks. An example from the post-run analysis is a missing P50 from the list due to an even number of experiments. Every tool has different methods of processing and visualizing statistics output. Assuming a similar definition and approach can lead to confusion. A strategy to assign a facies model that represents a geo-body at a specific time or zone is described by considering dependency and hierarchy among variables. The result is calculated, visualized, and ranked at the zone level to avoid percentile misconceptions. Then, the corresponding percentile from each tank is combined to build a consistent field-level model. It is essential to understand which statistical approach a tool uses, and whether it uses a function to determine the percentile inclusive/exclusive of the first and last values in the array. Integration work could identify problem earlier and then resolve them before further effort. This paper aims to guide in building a consistent uncertainty analysis modeling and avoid unnecessary rework due to misconception.","PeriodicalId":442360,"journal":{"name":"Proceedings of Indonesian Petroleum Association, 46th Annual Convention & Exhibition, 2022","volume":"10 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":"123936186","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":"The Success Story of H2S Scavenger Injection as Temporary Solution to Maintain Production During One of Two Amine Regeneration System Breakdown in X Gas Plant","authors":"D. Adiwibowo","doi":"10.29118/ipa22-f-81","DOIUrl":"https://doi.org/10.29118/ipa22-f-81","url":null,"abstract":"X gas plant has 4 process trains and one bypass train with capacity 800 MMscfd. Each process Train equipped with Amine contactor to reduce the CO2/H2S to below gas specification 5% mole CO2 and 8 ppm H2S. Rich Amine from contactors then regenerated through two Amine regenerator, heating media used hot water which maintained its temperature by using fired heater. X gas plant had experience breakdown of one Amine regenerator, which decreases plant capacity to 640 MMscfd. Impact of one regenerator breakdown the lean amine circulation rate decreases from total 1540 USGPM to 910 USGPM, with limited amine circulation to maintain liquid turndown at Amine contactor packing, Train-1/2/3 circulated with Amine, while Train-4 with no amine circulation. Several options were evaluated, application of H2S Scavenger Injection come up as the most probable option considering cost and time. Hydroxyethyl-triazine based was selected. Uncontrolled reaction and improper injection technique will lead to inefficient treating dosages and unwanted by-products. By combining knowledge of scavenger stoichiometric reaction with H2S, triazine content, spray nozzle injection technique, and produced water scale tendency, succeed to reduce the H2S content and reverting plant capacity to 800 MMscfd.). H2S Scavenger is injected through spray-nozzle installed in 12” gas line header upstream of Cooler Train #4 at 140OF and ±1250 psig. Initial injection is started with ±105 MMscfd treated gas which provide 24 second contact time with 0.45 L scavenger/MMscfd. As the initial treatment succeed to reduce H2S content from 35 to below 5 ppm, treated gas flowrate then increased gradually to 150 MMscfd and further to 220 MMscfd with 0.5 and 0.55 L/MMscfd scavenger dosage respectively. Increased treating dosage sufficiently maintain H2S scavenging efficiency with 50% reduced of contact time. H2S Scavenger direct injection could be considered as temporary solution program during such disturbance of amine system performance. The Amine regenerator repair was consumed 118 days, while H2S scavenger application was implemented after 34 days Amine regenerator repair activity until amine heater completed repair and back online which is for 84 days injection. In this case H2S Scavenger injection can optimize X gas plant sales gas 9.05 BSCF (equivalent with 55 MMUSD) with additional operating cost 0.916 MMUSD.","PeriodicalId":442360,"journal":{"name":"Proceedings of Indonesian Petroleum Association, 46th Annual Convention & Exhibition, 2022","volume":"16 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":"124474051","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":"The Innovation of Making Exhaust Emissions Calculation Applications (PEGANG) for CPP Gundih Using The Non-Clause Method at PT. Pertamina EP Cepu, Cepu Field","authors":"A. Z. Abidin","doi":"10.29118/ipa22-o-176","DOIUrl":"https://doi.org/10.29118/ipa22-o-176","url":null,"abstract":"The Central Processing Plant (CPP) Gundih is a gas plant that can produce 13MMSCFD acid gas after the purification process. Most of the composition of the acid gas consists of H2S & CO2. Half of the total acid gas is converted into sulphur pellets and the remaining 6.5MMSCFD is burned in the Thermal Oxidizer (TOX) unit. It is known that burning H2S will produce exhaust gas emissions in the form of SO2 content. In accordance with the mandate of the Ministry of Environment No.13 of 2019 concerning \"Quality Standards for Emissions from Immovable Sources for Oil and Gas Businesses and/or Activities\", is an obligation for all subsidiaries to report the total exhaust emissions produced in each equipment, either continuously or intermittently. This calculation will be very important when the scheme from the Ministry of Finance will impose exhaust emission taxes and carbon credits starting in 2023. The calculation of venting gas emissions in the TOX unit which has so far been carried out using the Clause Method is not representative enough to display the actual total gas emissions. Based on the calculation formula from external parties, the entire acid gas produced is considered as exhaust emissions. However, in actual conditions only half of the total acid gas is vented to the TOX unit and the remaining half is converted to sulphur using the Biological Sulfur Recovery Unit (BSRU). Based on that problem, with the Non-Clause Method approach through the PEGANG application, the separation of the calculation of venting acid gas to TOX and to the BSRU unit resulting in the calculation of exhaust gas emissions at CPP Gundih tends to be smaller and more representative. The PEGANG application is very useful as it can be an indicator of the amount of emissions that are released to the environment, especially on the equipment in CPP Gundih.","PeriodicalId":442360,"journal":{"name":"Proceedings of Indonesian Petroleum Association, 46th Annual Convention & Exhibition, 2022","volume":"79 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":"126175769","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":"Fill in The Gap Between Seismic and Borehole Imaging Scale With Highdefinition Karst Mapping for Improved Geosteering Strategy","authors":"D. Kusuma","doi":"10.29118/ipa22-e-299","DOIUrl":"https://doi.org/10.29118/ipa22-e-299","url":null,"abstract":"The CD carbonate of the Ngimbang formation in the X-Field, East Java Basin, has multiple reservoir targets with varying flow units due to secondary porosity from karst processes. Each of these reservoirs are thin, and the continuity of the karst within the reservoir is quite random. The amount of producible hydrocarbon will depend on the length of the drain section along the reservoir and the amount of karst intersected by the wellbore trajectory. Thus, maintaining the trajectory inside the carbonate reservoir while mapping and targeting the karst position is especially important for hydrocarbon productivity. Many horizontal and high-angle wells were drilled from the first offshore platform in this field as part of the phase one development plan. To maintain production in the field, a new offshore platform was placed south of the first platform, targeting new development areas in the field. Five horizontal wells were planned as part of the second development phase. The first horizontal well to be drilled in the second phase was the most challenging well because of the high uncertainty in the structural dips along the lateral length caused by the low-seismic resolution data and the limited number of nearby offset wells for control points. Moreover, the offset wells had inconsistent log properties, which complicates for correlating the well landing in the targeted karst level within the reservoir. Initially, a pilot hole was planned to reduce the landing uncertainties; however, drilling the pilot hole was being challenged for cost efficiency. As a result, a geosteering strategy was proposed instead, comprised of landing and geosteering using a new logging-while-drilling (LWD) combination of a new high-definition reservoir mapping technology, high-resolution laterolog borehole imaging technology, and multifunction LWD tool. This paper presents the complete preparation procedure of the geosteering project, strategy, and evaluation using this new LWD combination for improved reservoir interpretation. The deeper reading and higher resolution of the new reservoir mapping technology enabled continuous mapping of the target reservoir boundaries that reduced the structural uncertainties in the seismic measurements, and for the first time, revealed the karst architecture within the reservoir with greater details. This high-definition information helped to land the well precisely in the target karst sweet spot, improved the understanding of the karst characters along the trajectory, and provided greater confidence in the real-time geosteering decision. The high-resolution borehole image revealed the carbonate rock texture and karst and vugs appearance on a smaller scale, which was used to analyze the secondary porosity distribution and contribution along the wellbore trajectory. Integrating this additional information while drilling allowed for bridging the gap from seismic to reservoir scale, and finally linking the information to the high-resolution boreho","PeriodicalId":442360,"journal":{"name":"Proceedings of Indonesian Petroleum Association, 46th Annual Convention & Exhibition, 2022","volume":"37 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":"128635372","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":"A Comprehensive and Systematic Reservoir Performance Prediction Workflow in Tangguh Ubadari Field, Delivering a Confidence in Unlocking Resource Progression and Prediction Forecast","authors":"A. Dewanto","doi":"10.29118/ipa22-e-47","DOIUrl":"https://doi.org/10.29118/ipa22-e-47","url":null,"abstract":"Tangguh Field is located in Bintuni Bay, Papua Barat Province, Indonesia. Tangguh development was commenced following successful exploration program in 1990s. Tangguh has been on production since 2009 through development of 2 LNG trains (Kasim, Titus, Roberts, & Bulling, 2000). Tangguh integrated full field development includes the third LNG train S/U 2023, and development of Ubadari Field and Vorwata EGR/CCUS which Plan of Development (POD) was approved by Government of Indonesia (GoI) in August 2021. Decision to develop Ubadari field is based upon successful drilling of Uba Deep-1 appraisal well in 2018, which supports larger resources in Lower Roabiba reservoir. Ubadari development will be able to mitigate the risk of production shortfall ca 2025 once Tangguh major fields start to decline, as well as to contribute on meeting Indonesia’s growing energy demand. Ubadari development will open opportunity to develop some marginal economic prospects in Western Berau area. The selected development scenario consists of two offshore platforms with five wells, and one export pipeline. Gas from Ubadari Field will be produced directly to Train-3 Onshore Receiving Facilities (ORF) through a new offshore pipeline and tie-in connection to Tangguh fence. To date, there is no production from Ubadari Field, therefore predicting reservoir performance considering subsurface uncertainties is very critical to underpin the development plan. A bp’s proprietary Top Down Reservoir Modelling (TDRMTM) tool-based workflow has been successfully implemented. The workflow considers ranges of reservoir descriptions from limited static data and short Drill Stem Test (DST)/pressure data from exploration/appraisal wells, along with some global analog data, to underpin the evaluation of the system energy, driving mechanism, reservoir connectivity and drainage to predict reservoir performance. The workflow has enabled robust resource progression and development planning, particularly associated with the well count and location, with healthy exploration of subsurface uncertainties.","PeriodicalId":442360,"journal":{"name":"Proceedings of Indonesian Petroleum Association, 46th Annual Convention & Exhibition, 2022","volume":"50 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":"127194737","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}