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《Progress in Geophysics》 2015-01
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Research and application of rock physics models on weakly consolidated turbidite sandstone in West Africa deepwater region

LI Yan-hua;GAO Jun;ZHENG Lei;XIAO Yi;LIU Zhi-peng;SINOPEC Exploration & Production Research Institute;SINOPEC International Petroleum Exploration and Production Corporation;  
Deepwater turbidite sandstone reservoir is a "hot" target in today's exploration and development.In West Africa,Angola deepwater regions have rich hydrocarbon resources and huge potential.The tertiary deepwater turbidite sandstone is buried shallowly and has weak diagenesis.It is not obvious to use the seismic reflection p-wave velocity and impedance to distinguish between the favorable sandstone reservoir and their surrounding rocks.Limited by the lack of measured logs or the unreliability of the measured acoustic,shear or density in some wells,seismic inversion results can be seriously affected.The purpose of this paper is to study a set of rock physics models suitable for reservoir prediction in the region of weakly consolidated turbidite sandstone.The fitting reasoning method which consists of determining the mineral skeleton elastic parameters is introduced,the equivalent grain model is critically improved,and then rock physics templates of weakly consolidated turbidite sandstone is built for the region.Thus the logging curves can be corrected reasonably and shear wave can be predicted.Through seismic prestack inversion,the reservoir prediction accuracy of turbidite sand can be as high as85%.Therefore the proposed rock physics technology is reliable in deep weakly consolidated turbidite sandstone in West Africa.
【Fund】: “十二五”国家重大科技专项“孔隙型碳酸盐岩油藏提高采收率关键技术”(2011ZX05031-003)资助
【CateGory Index】: P618.13;P631
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