吸收系数在川东南油气预测中的应用  

Application of Absorption Coefficient to Oil-Gas Prediction in Southeastern Sichuan Area

作　　者：宁松华[1] 

机构地区：[1]长江大学油气资源与勘探技术教育部重点实验室,湖北荆州434023

出　　处：《新疆石油地质》2007年第2期167-169,共3页Xinjiang Petroleum Geology

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。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. h 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.

关 键 词：油气预测 吸收系数 储集层描述 地震振幅 

分 类 号：P631.445.91[天文地球—地质矿产勘探]