【摘要】 川东建南地区上石炭统黄龙组残余厚度一般在0～30 m,岩性以白云岩、石灰岩和角砾岩为主,且以前两类的储集物性较好。白云岩类是工区石炭系最重要的储集层,在白云岩类储层中又以针孔白云岩最好;石灰岩类储层中以角砾状灰岩较好。利用三维地震资料所作的属性定量分析、波阻抗反演及厚度预测等储层预测工作表明,黄龙组储层较围岩具有高阻抗的特点,其中物性最好的针孔白云岩表现为高阻抗背景下的低阻抗特征,物性较差的角砾白云岩表现为高阻抗特征。储层的测井响应特征及地震响应特征分析发现,当地震剖面存在双强相位(双轨特征)时,黄龙组地层存在,而当地震剖面呈现单轨特征时,则黄龙组地层不存在;地震振幅强弱与黄龙组厚度密切相关。利用地震属性及波阻抗反演技术同时预测储层厚度,其结果与实钻结果相当吻合。更多还原

【Abstract】 The Upper Carboniferous Huanglong Formation is generally up 0～30m in residual thickness in Jiangnan area,the eastern part of Sichuan Basin.Dolostone,limestone and breccia are common in Huanglong Formation,among which the formers are of better reservoir property.The dolostone comprises the most important reservoir in Carboniferous strata.Pinhole dolostone is of the best reservoir property in the dolostone reservoir while brecciated limestone is good in limestone reservoir.Based on the attribute quantitative analysis,wave impedance inversion and thickness prediction from 3-D seismic data,it is indicated that the Upper Carboniferous Huanglong reservoir rock is characterized by higher impedance than its wall rock.In the Huanglong reservoir,the pinhole dolostone is characterized by low impedance under the background of high impedance while the breccia dolostone shows high impedance.The analysis of log and seismic response characteristics of the reservoir has shown that Huanglong Formation is present when the double strong phase occurs in seismic profiles while Huanglong Formation is not present when the single strong phase occurs,which indicates that seismic intensity is closely relative with the thickness of Huanglong Formation.The result of predicting reservoir thickness by seismic attributes and wave impedance inversion is well accorded with that by drilling.更多还原