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• W4233152106 abstract "Reservoir Modeling To Verify Geologic and Petrophysical Data: A Case Study H. Ucok H. Ucok Unocal Corp. Search for other works by this author on: This Site Google Scholar Paper presented at the SPE California Regional Meeting, Long Beach, California, March 1988. Paper Number: SPE-17436-MS https://doi.org/10.2118/17436-MS Published: March 23 1988 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Get Permissions Search Site Citation Ucok, H. Reservoir Modeling To Verify Geologic and Petrophysical Data: A Case Study. Paper presented at the SPE California Regional Meeting, Long Beach, California, March 1988. doi: https://doi.org/10.2118/17436-MS Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll ProceedingsSociety of Petroleum Engineers (SPE)SPE Western Regional Meeting Search Advanced Search AbstractReservoir modeling was utilized for resolving the large differences in core versus open-hole log derived petrophysical data gathered during the development of the Upper Repetto Reservoir of the Santa Clara Unit. Additionally, the model was utilized to confirm the presence of a sealing fault that was thought to he crossing the reservoir in a north-south direction.The availability of four years of historical performance at the time of the modeling study along with some pressure transient data were viewed adequate to resolve the differences in petrophysical data and also to verify the presence of a north-south crossing fault.The petrophysical properties in question, i.e., porosity and water saturation, as well as the location and the shape of the flow barrier, were all considered to be secondary history match variables behind the relative permeability during the history matching process. The reservoir description was accepted as correct upon achievement of a good history match between the actual and predicted performances.An excellent agreement was achieved between the measured gas and water rates in field wide and in individual wells by modest adjustments in relative permeability using a reservoir description which was based on log derived porosity and core derived water saturation values. The reservoir description also included a linear flow barrier between the two domes. Thus, in the Upper Repetto reservoir the log derived porosity () and core derived water saturation (sw) values were verified to be correct individually or at least in combination (in the absence of other information). This was somewhat expected, especially for the water saturation. Because of the presence of abundant conductive minerals in the formation, the large error in water saturation was believed to be associated with the log derived values.The presence of a flow barrier again was confirmed by an excellent history match in field wide and in individual well performances, particularly in those wells that were in close proximity to the flow barrier.IntroductionThe Upper Repetto Reservoir of the Santa Clara Unit underlies offshore federal leases in the southeast corner of the Santa Barbara channel. The hydrocarbons were discovered in 1971, by drilling OCS P-0216 No. 1. The discovery was subsequently confirmed by drilling wells OCS P-0216 Nos. 2, 3, and 4. The development drilling started in October of 1981, and the wells were drilled on an approximately 20 acre spacing in the thicker sections of the reservoir.During the development of the Upper Repetto Reservoir, anomalous geologic and petrophysical data were encountered. A gas cap was discovered in the structurally deeper east dome of the two-domed anticline, while no free gas was found in the shallow dome to the west.P. 337^ Keywords: gas cap, upstream oil & gas, history match, gas production match, reservoir description, west block well, water saturation, porosity, flow barrier, block well Subjects: Reservoir Characterization, Reservoir Simulation, Formation Evaluation & Management This content is only available via PDF. 1988. Society of Petroleum Engineers You can access this article if you purchase or spend a download." @default.
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• W4233152106 title "Reservoir Modeling To Verify Geologic and Petrophysical Data: A Case Study" @default.
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