摘要
墨西哥东南盆地M区块W构造是区块的重点构造,W构造白垩系碳酸盐岩储层构造裂缝的发育程度决定了整个区块的勘探潜力。对周边已钻相似构造岩心和成像测井裂缝发育特征的统计表明,中白垩统地层有效裂缝最为发育,裂缝的走向主要为NW—SE向和NE—SW向。研究分析认为,裂缝的发育规律主要受到区域应力和岩性差异的控制,在此基础上建立了'盐底辟之上挤压背斜'裂缝发育模式。最终应用地层切片和曲率属性技术,预测了W构造白垩系裂缝的平面展布:裂缝集中发育在中白垩统,裂缝走向为NW—SE向,与周边钻井统计结果一致,证实了预测的可靠性。
The Structure W is an important structure in the Sureste Basin of Mexico for oil and gas exploration,where hydrocarbon accumulated in the Cretaceous carbonate of the block M depends on reservoir fractures.After studies of the cores and FMI logging data in similar cases,we calculated the density and strike of fractures.The result shows that effective fracture is most developed in the Middle Cretaceous along a NS-WE strike.Regional stress and lithology are the major control factors on the development of fractures and the strikes of effective fractures.A model for fracture development caused by the salt-related compressive anticline is proposed.Finally,using the Stratal slice technology and curvature attribute,it is predicted that the Cretaceous is the fracture-developed strata in the Structure W.The result is supported by statistical results from surrounding structures.
作者
张量
卢景美
李爱山
孔国英
赵晨露
张彪
ZHANG Liang;LU Jingmei;LI Aishan;KONG Guoying;ZHAO Chenlu;ZHANG Biao(Overseas Evaluation Center,CNOOC Research Institute Co.,Ltd.,Beijing 100028,China)
出处
《海洋地质前沿》
CSCD
2019年第5期58-65,共8页
Marine Geology Frontiers
基金
中海石油(中国)有限公司科技项目(YXKY-2018-ZY-01)
关键词
墨西哥湾
墨西哥东南盆地
白垩系
裂缝
地层切片
曲率
Gulf of Mexico
Sureste Basin of Mexico
Cretaceous
fracture
stratal slice
curvature