摘要
结合四川盆地3 000 km地震剖面实际资料和1 200口井钻井资料,从典型井和典型区块研究出发,地震与地质相结合,研究了川中-川东地区下二叠统茅口组二段白云岩测井、地震等响应特征,寻找茅口组二段白云岩分布的规律。研究结果表明,当茅二a段发育白云岩时,白云岩底界在地震剖面上具有弱-较强反射特征,白云岩发育区呈北西-南东向展布,靠近泥岩发育区左侧边界是白云岩储层发育的最有利区。四川盆地下二叠统茅口组白云岩分布呈条带状大面积分布,勘探潜力巨大,为下一步勘探的接替目标。
Combined with the practical data of 3 000 km seismic profile and 1 200 wells drilling data in Sichuan basin, starting from the typical wells and well blocks, in combination with geological and seismic facies, the characteristics of dolomite logging, seismic response and the distribution regularities of the Maokou formation in the middle Permian were studied. The results show that when the dolomite was developed at MAO 2 a member, the dolomite bottom was of weak-strong reflection characteristics on the seismic section, the dolomite development zone was in the northwest-southeast distribution, and it is the most favorable dolomite reservoir development area near the shale development area on the left side of the border. The distribution of dolomite in Maokou formation of lower Permian in Sichuan basin is a strip of large area and the seismic exploration potential is huge, which is a replacement target for further exploration.
引文
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