致密砂岩气藏井网加密潜力快速评价方法

doi:10.11743/ogg20160117

Abstract

Abstract: Recovery factor of tight sandstone gas reservoir is low due to disadvantageous geological condition.Domestic and overseas development practices indicate the importance of infill drilling for EOR.Several methods including numerical simulation,geostatistical analysis and moving split-window are available for rapid evaluation of in-fill drilling potential.However,the numerical simulation method is high in cost,and the geostatistical analysis and moving split-window methods are not accurate.In this paper,a functional relationship is established between well spacing density and incremental recoverable reserve of single well based on geological data and dynamic behavior analysis.The infill drilling profit function is developed based on economic principles.The proposed quick evaluation method can be used to evaluate the potential of infill drilling and support decision making in development adjustment and potential tapping of tight gas reservoirs.Case study result shows great infill drilling potential in DK13 Block in Daniudi gas field, the optimal economic well spacing density is 2.2 wells/km², the economic limit well spacing density is about 7.06 wells/km² under current oil price and operation cost.

Key words: dynamic analysis, recoverable reserve, well spacing density, recovery, tight sandstone gas reservoir

CLC Number:

TE348

Yan Jin, Shi Yunqing, Zheng Rongchen, Wang shuping. Quick evaluation methodology of infill drilling potential in tight sandstone gas reservoirs[J]. Oil & Gas Geology, 2016, 37(1): 125-128.

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Quick evaluation methodology of infill drilling potential in tight sandstone gas reservoirs

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