叠前AVO反演在碳酸盐岩缝洞型储层预测中应用  

Application of AVO prestack inversion to prediction of fractured-vuggy carbonate reservoirs

作　　者：喻定成 高刚[1,2] 杨亚华[1,2] 周游[1,2] 周永娇 

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,湖北武汉430100 [2]长江大学地球物理与石油资源学院,湖北武汉430100

出　　处：《能源与环保》2017年第2期191-195,198,共6页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：国家自然科学基金项目(41374134);中国石油科技创新基金项目资助(2015D-5006-0301)

摘　　要：针对滨里海盆地东缘M区块石炭系碳酸盐岩缝洞型储层的精细预测问题,开展了基于三维叠前地震数据的AVO反演技术应用研究,重点论述了岩石物理分析、敏感弹性参数验证、多参数综合分析等关键技术环节。基于三维叠前地震资料,利用叠前地震资料对油气检测的敏感性更强的特点,以工区内的实际井统计资料为基础,结合岩石物理参数分析,建立岩石物理模型,分析孔洞型碳酸盐岩储层的流体敏感性特征。通过叠前AVO反演技术,反演出多种岩石物理参数(纵、横波阻抗、密度和杨氏模量等),进行多参数综合分析储层预测,同时借助裂缝检测技术进行论证,成功预测了储层发育带。经过实测钻井资料验证,多参数分析结果与工区内井的吻合程度很高。Aimed at the problems of detailed prediction of the Carboniferous fractured-pit reservoirs in M-block of the Eastern Margin in Pre-Caspian Basin,to refine the Carboniferous fractured-pit reservoirs in the M-Block Carboniferous-type reservoirs on the eastern mar-gin of the Caspian Basin,the application of AVO inversion technology based on three-dimensional prestack seismic data was conducted. This paper is focusing on rock physical analysis, verification of sensitive elastic parameters, multi-parameter comprehensive analysis. Based on the 3-D prestack seismic data,the physical model of the rock was established based on the statistical data of the actual well and the physical parameters of the rock in the work area. And find out which petro physical parameters are sensitive to the pore-type carbonate reservoirs and analyze them concretely. Based on the geological and logging data,a series of pre-stack AVO inversion tech-niques were used to invert the physical parameters such as longitudinal and shear wave impedance, density and Young modulus. The inversion parameters are used to analyze the favorable distribution area and the reservoir development zone was successfully predicted by means of fracture detection technology. The result of multi-parameter analysis is consistent with that of most wells in the work area, which indicates that this method is a stable and effective prediction method for the complex carbonate reservoirs.

关 键 词：滨里海盆地 碳酸盐岩储集层 叠前AVO反演 岩石物理 流体敏感因子 

分 类 号：P631.4[天文地球—地质矿产勘探]