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- W2015287057 abstract "Abstract An integrated geological study has been performed for a large, mature field at the Bekasap and Menggala formation. The primary goal of the study was to developed an integrated reservoir description for targeted infill drilling and improve recovery in a low-permeability reservoir. Integration of geological and petrophysical studies and reservoir performance analysis provided a rapid and effective method for developing a comprehensive reservoir description. A 3D geocelluar model of reservoir architecture and properties distribution was made and used as a guide to further development. This model delineates distinct trends of estuarine, sand ridge, and margin facies throughout the field that reflect paleogeography. Additionally, reservoir properties and saturations were geostatistically populated within the model. Horizontal wells were chosen as the preferred alternative to provide maximum exposure of reservoir layers and improve production and ultimate recovery compared to conventional vertical wells or frac jobs. Thirty one (31) horizontal wells were drilled in the Bekasap field, and this program was very successful and predicted ultimate recovery has improved from 14% to 28%. The study of this low permeability reservoir in the Bekasap field is an excellent opportunity to:demonstrate the economic importance of this zones,understand the methodologies required for identifying and evaluating these pay types, andhelp the company to find additional reserves in the Central Sumatra Basin. Introduction The Bekasap field is located at Sumatera Island, approximately 120 km north of Pekanbaru city, Indonesia, within Rokan Block Production Sharing Contract of PT. Chevron Pacific Indonesia (Fig-1). This field was discovered in June 1955, and put on production in September 1957, currently consisting of 107 producing wells, 16 injection wells, 12 P&A wells, and 2 disposal wells. Due to the long period of its production, most of the main reservoirs have shown pressure depletion. To augment the reservoir pressure and increase the oil production rate, the main reservoirs / high quality sands have been peripherally water flooded starting July 1997. The oil at the high quality sands that is referred to clean sands have been swept mostly by existing vertical wells, while low quality sands is refer to shally sands that have poor permeability but still quite potential in producing some oil contained in the sands. Cased hole resistivity has been run in several wells to identify the remaining oil left Following to the success of the pilot horizontal well Bekasap#103 in the low permeability reservoir, thirty one (31) horizontal was drilled. The targets of horizontal wells were 1950'Sand of Bekasap Formation and upper 2420' Sand of Menggala Formation. Generally, this program was very successful and delivered attractive improvement of ultimate recovery. However, several horizontal wells were recognized delivering oil below prediction due to any reason such as well placement, effective lateral length, drilling execution, and completion." @default.
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- W2015287057 date "2007-10-30" @default.
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- W2015287057 title "An Integrated Study of Low Permeability Reservoir in the Bekasap Field, Central Sumatra Basin, Indonesia" @default.
- W2015287057 doi "https://doi.org/10.2118/109846-ms" @default.
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