【摘要】 地层的吸收系数受控于岩石骨架的弹性性质,同时也受控于地层的孔隙及孔隙中流体的性质,而地层的吸收系数又是反映储集层含油气的重要参数。利用地层的吸收系数变化特征,可以较好地追踪含油气储集层,特别是含气储集层。通过对川东南某区叠后资料的处理,获得该研究区三维吸收系数数据体资料,通过分析发现在含气层部位的吸收系数要强于未含气地层。利用这些解释成果,再结合地质、钻井和测井等资料的综合分析,可以较好地划分出含油气层的分布范围,从而达到油气预测的目的。更多还原

【Abstract】 The absorption coefficient of strata is controlled by elastic property of rock matrix,also by the properties of porosity and pore fluid.In addition,it is an important parameter reflecting oil-gas bearing property of reservoir rocks.The variation of the absorption coefficient can be used to trace oil-gas bearing reservoir rocks,especially gas pools.This paper presents the processing results of post-stack seismic data in an area of southeastern Sichuan province,obtaining the 3D absorption coefficient database.And the analysis indicates that the coefficient of gas zone is bigger than that of non-gas zone.It is concluded that the comprehensive analysis from these results,combining with geologic,drilling and well logging data,could better delineate the distribution scope of oil-gas bearing zone for the purpose of prediction of oil and gas reservoirs.更多还原