摘要
鄂尔多斯盆地东缘大宁—吉县区块石炭系—二叠系发育煤系地层,岩性复杂,储层致密且厚度小(一般为2~10m,平均为3m)、横向变化快,导致砂岩储层地震反射特征多样,定量预测难度大。为此,分析储层地震响应特征,开展了相控储层反演。首先,采用二维地震正演方法,明确不同沉积微相的地震响应模式;然后,开展波形聚类分析,明确相边界;最后,基于地震波形指示反演技术开展“相控反演”,通过对不同微相的砂体边界进行约束,实现了二叠系山西组2^(3)亚段致密薄储层的定量预测。与实际地震资料对比,反演结果可靠;后验井证实反演结果与钻探结果吻合率达83%。该方法可为同类致密储层的预测提供参考。
Coal measure strata have developed in the Carboniferous-Permian in the Daning-Jixian Block located at the eastern margin of the Ordos Basin.These strata are characterized by complex lithology,tight thin reservoirs(generally 2~10m thick,with an average thickness of 3m),and fast lateral variation.Consequently,the sandstone reservoirs exhibit diverse seismic reflection characteristics,leading to difficult quantitative prediction.For this reason,the seismic response characteristics of the reservoirs are analyzed,and facies-controlled reservoir inversion is conducted.Specifically,the twodimensional seismic forward modeling method is used to identify the seismic response patterns of different sedimentary microfacies.Then,waveform clustering analysis is carried out to define the facies boundaries.Finally,the seismic waveform indication inversion method is employed for“facies-controlled inversion”.The sand body boundaries of different microfacies are constrained,thereby achieving the quantitative prediction of the tight thin reservoir in the third submember of the second member of the Permian Shanxi Formation.The comparison with actual seismic data reveals the reliability of the inversion results.The posterior wells verify that the coincidence rate between the inversion results and the drilling data reaches 83%.The proposed method can provide technical support for the prediction of similar tight reservoirs.
作者
张枫
贾学成
张晓敏
姜宏宇
张宝权
刘翠风
ZHANG Feng;JIA Xuecheng;ZHANG Xiaoming;JIANG Hongyu;ZHANG Baoquan;LIU Cuifeng(Geological Research Center,GRI,BGP Inc.,CNPC,Zhuozhou,Hebei 072751,China)
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2022年第S01期215-222,18,共9页
Oil Geophysical Prospecting
基金
中国石油天然气集团有限公司重大科技专项“海陆过渡相页岩气勘探开发关键技术研究”(2021DJ2002(JT))资助
关键词
鄂尔多斯盆地东缘
煤系地层
薄储层
正演
相控反演
eastern margin of the Ordos Basin
coal measure stratum
thin reservoir
forward modeling
facies-controlled inversion
作者简介
张枫,副教授,1974年生,1997年获西南石油学院油藏工程专业学士学位,2005年获中国石油勘探开发研究院石油工程专业硕士学位,2008年获中国地质大学(北京)油气田开发工程专业工学博士学位,现就职于东方地球物理公司研究院地质研究中心,主要从事地震资料解释及地质综合研究。河北省涿州市华阳东路东方地球物理公司科技园研究院地质研究中心,072751。Email:zhangfeng08@cnpc.com.cn
