不整合类型及其控油特征
网络出版日期: 2013-11-26
基金资助
山东省自然科学基金项目“基于大中型不整合结构体的油气分布规律研究”(编号:ZR2013DM016)和中央高校基本科研业务费专项“基 于碎屑岩不整合结构体的次生成岩特征研究”(编号:14CX02034A)联合资助。
Unconformity types and their constraints on hydrocarbon behavior
Online published: 2013-11-26
在借鉴前人研究成果的基础上,利用地震地层学和现代油气成藏理论,根据不整合面上、下地层的剖面形态以及界面两侧地震反射终端组合关系,提出了一种较为统一的不整合类型划分方案。 该方案将不整合划分为平行-褶皱型、平行-削截型、平行-平行型、超覆-褶皱型、超覆-削截型及超覆-平行型等 6 种类型。 其中,平行-褶皱型和平行-削截型不整合面之上有利于油气的运移,不整合面之下有利于油气的聚集;平行-平行型不整合面上、下对油气运移有利,只有在断层与褶皱的配合下,才有利于油气的聚集;超覆褶皱型和超覆-削截型不整合面上、下对油气聚集最有利;超覆-平行型不整合面之上有利于油气的聚集,不整合面之下有利于油气的运移。 该划分方案将不整合作为一个整体来研究,较好地解决了不整合与油气运聚评价之间的有机联系,具有一定的科学性和实用性,对于地层油气藏的勘探,具有一定的借鉴作用。
莫冯阳 , 牟中海 , 常琳 , 由超 , 徐乐 . 不整合类型及其控油特征[J]. 岩性油气藏, 2013 , 25(6) : 1 -7 . DOI: 10.3969/j.issn.1673-8926.2013.06.001
Referring to the previous research achievements, guiding by theories of seismic stratigraphy and modern hydrocarbon accumulation, this paper put forward a new kind of unconformity type classification scheme on the basis of the profile morphology and the combination of seismic reflection end of two sides of the unconformity surface. In this scheme, the unconformity was divided into six kinds of types: parallel-fold type, parallel-truncation type, parallel parallel type, onlap-fold type, onlap-truncation type and onlap-parallel type. Among them, the upper part of parallel-fold type and parallel-truncation type are favorable for hydrocarbon migration, and the lower part are favorable for hydrocarbon accumulation; the upper or lower part of parallel-parallel type are favorable for hydrocarbon migration and favorable for hydrocarbon accumulation under the match of fault and fold; the upper or lower part of onlap-fold type and onlap-truncation type are most favorable for hydrocarbon accumulation; the upper part of onlap-parallel type are favorable for hydrocarbon accumulation, and the lower part are favorable for hydrocarbon migration. This classification scheme is more efficient and applicable because of considering unconformity as a whole and the relationship between unconformity and hydrocarbon accumulation, which will be favorable for stratigraphic reservoir exploration.
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