辽西低凸起北段源—汇系统精细描述与油气勘探实践

发布时间：2018-03-08 10:26

本文选题：源-汇系统　切入点：隐性物源　出处：《地球科学》2017年11期 　论文类型：期刊论文

【摘要】：辽西低凸起北段现存物源区范围小,长期被认为供源能力不足缺乏优质储层而成为勘探"禁区".为理清辽西低凸起北段物源面貌及沉积储层分布规律,综合利用钻井、测井和三维地震资料,对古物源区面貌、古沟谷与坡折体系等源-汇要素精细描述,预测了富砂沉积体平面分布,并探讨了砂体差异富集的控制因素.结果表明:研究区自南向北发育多个孤立的"链状岛"状隐性物源区,并发育半充填型和侵蚀型两类古沟谷及8种坡折带组合类型,多个近源沉积体环物源分布.源-汇耦合关系决定了砂体的富集程度,其中物源区大小及持续发育时间是影响砂体发育的决定性因素,断裂活动及坡折带类型进一步决定了不同位置砂体富集程度的差异性.上述新认识指导发现了锦州25-1、锦州20-2北两个油气田.
[Abstract]:The existing provenance area in the northern section of low uplift in western Liaoning Province is small and has long been regarded as insufficient supply capacity and lack of high quality reservoir, which has become a "forbidden zone" for exploration. In order to clarify the provenance features and sedimentary reservoir distribution laws of the northern section of low uplift in western Liaoning Province, the comprehensive use of drilling is carried out. Well logging and three dimensional seismic data are used to describe the features of the source area of the ancient objects, the source and sink elements of the ancient gully and slope-break systems, and to predict the plane distribution of the sand rich sedimentary bodies. The results show that there are many isolated "chain island" recessive provenances developed in the study area from south to north, and there are two types of paleogranes and 8 slope break types, which are semi-filled type and erosive type. The accumulation degree of sand bodies is determined by the source-sink coupling relationship, in which the size of the source area and the duration of development are the decisive factors affecting the development of the sand body. The fault activity and the type of slope break further determine the difference of the enrichment degree of sand bodies in different locations. The above new understanding guides the discovery of Jinzhou 25-1 and Jinzhou 20-2 north oil and gas fields.
【作者单位】：中海石油(中国)有限公司天津分公司;
【基金】：国家科技重大专项(No.2016ZX05024-003)
【分类号】：P618.13

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