四川盆地中部下二叠统茅口组岩溶储集层地震预测

发布时间：2018-06-28 09:49

本文选题：四川盆地中部 + 下二叠统　；参考：《石油勘探与开发》2017年01期

【摘要】：基于近年来新的测井和地震资料,综合利用地球物理技术对四川盆地中部(川中地区)下二叠统茅口组岩溶储集层开展研究。定量岩石物理建模和分析表明,随着孔隙度、泥质含量以及含气饱和度的增加,岩溶储集层的纵、横波速度和密度均呈减小的趋势。基于岩石物理模型的地震正演分析结果证实,川中地区岩溶储集层在茅口组顶面具有弱振幅、低频率的"暗点"地震反射特征。通过地震属性和波阻抗反演预测了4个规模有利岩溶储集层发育带。综合评价认为川中地区茅口组岩溶储集层具备形成上倾岩性尖灭型岩性气藏的成藏条件,预测射洪西部和盐亭地区为川中地区最为有利的勘探区带。
[Abstract]:Based on the new logging and seismic data in recent years, the karst reservoir of the Lower Permian Maokou formation in the middle part of Sichuan Basin (central Sichuan area) was studied by using geophysical techniques. Quantitative rock physical modeling and analysis show that with the increase of porosity, shale content and gas saturation, the longitudinal, shear wave velocity and density of karst reservoir decrease. The seismic forward modeling results based on the rock physical model confirm that the karst reservoir in the central Sichuan area has weak amplitude and low frequency "dark spot" seismic reflection characteristics in the top mask of Maokou formation. Through seismic attribute and wave impedance inversion, four favorable karst reservoir development zones are predicted. The comprehensive evaluation shows that the karst reservoir of Maokou formation in central Sichuan has the conditions of forming updip lithologic pinnacle lithologic gas reservoir, and the west of Shehong and Yantiing area are the most favorable exploration zones in central Sichuan.
【作者单位】：中国石油勘探开发研究院;
【分类号】：P618.13;P631.4

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