春光区块沙湾组沉积相类型及岩性圈闭发育模式

发布时间：2018-03-15 21:05

本文选题：水下分流河道　切入点：辫状河三角洲　出处：《中国石油勘探》2017年02期 　论文类型：期刊论文

【摘要】：春光区块主力生油层沙湾组的沉积相类型一直备受关注,很多学者也都做过详细的研究与探讨,但成果与认识存在较大分歧。在野外剖面、钻井岩心观察描述的基础上,结合岩石颜色、沉积构造等相标志,认为春光区块沙湾组为辫状河三角洲—湖泊沉积体系;根据已钻井测井曲线的形态特征、地震属性值特征进行沉积微相分析,识别并划分出了辫状河河道、辫状河三角洲前缘水下分流河道沉积微相。统计分析沙湾组主要出油点岩性圈闭发育特征,发现辫状河三角洲前缘水下分流河道砂体是主要的油气储集体,发育辫状河三角洲前缘水下分流河道砂体储集—侧向相变封堵沉积模式。在此模式指导下,对研究区进行有利勘探目标优选,认为沙湾组S2砂组在研究区中西部发育的辫状河三角洲前缘水下分流河道沉积为下一步油气勘探的Ⅰ类目标相带。
[Abstract]:The types of sedimentary facies of Shawan formation, the main oil source formation in Chunguang block, have been paid close attention to, and many scholars have also done detailed research and discussion, but the results and understanding are quite different. On the basis of field profile and core observation and description, Combining the color of rocks and sedimentary structure, it is considered that Shawan formation in Chunguang block is a braided river deltaic lacustrine sedimentary system, and sedimentary microfacies are analyzed according to the morphological characteristics of well logging curves and seismic attributes. The sedimentary microfacies of braided river channel and underwater distributary channel in front of braided river delta are identified and divided. It is found that the sand body of underwater distributary channel in the front edge of braided river delta is the main reservoir of oil and gas, and the reservoir of sand body of underwater distributary channel in the front edge of braided river delta is developed. It is considered that the S 2 sand formation of Shawan formation developed in the central and western part of the study area is the first type of target facies for further oil and gas exploration, and the underwater distributary channel deposits in the front edge of braided river delta are considered as the next type of target facies for oil and gas exploration.
【作者单位】：无锡工艺职业技术学院机电工程系;长江大学地球科学学院;中国石油新疆油田公司勘探开发研究院地球物理研究所;中国石化河南油田分公司工程咨询有限公司;
【基金】：国家科技重大专项“西非重点区深水碎屑岩高精度层序地层研究与储层精细评价”(2011ZX05030-003-001) 国家自然科学基金青年科学基金项目“黄骅坳陷孔南地区枣Ⅲ界面的构造属性及其地质意义”(41402111)
【分类号】：P618.13

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