姬塬地区延长组长2 油藏油气成藏条件研究
网络出版日期: 2012-10-20
基金资助
中国科学院2011 年度研究生科技创新类项目“黔北地区下寒武统牛蹄塘组页岩气成藏的生烃条件研究”(编号:2011-37)资助
Hydrocarbon accumulation conditions of Chang 2 oil reservoir set in Jiyuan area, Ordos Basin
Online published: 2012-10-20
姬塬地区是鄂尔多斯盆地重点油气勘探区域之一。系统研究姬塬地区长2 油藏的烃源岩、储集层、 油气运移以及油气圈闭条件等,并综合分析了长2 油藏的油气成藏条件。研究结果表明:姬塬地区紧邻盆地延长组生烃中心,油气供应充分,长2 油藏的油气主要来自长7 烃源岩;主要储层是水下分流河道砂 体,岩石成分以长石砂岩、岩屑长石砂岩为主,极少量长石岩屑砂岩,为近中孔隙度、低渗透率储层;成岩作 用类型主要有压实作用、胶结作用、溶蚀作用等。长7 地层产生的异常高压是长7 烃源岩产生的油气自下 而上运移到长2 地层的主要驱动力。研究区长2 油藏的圈闭主要是构造-岩性圈闭,局部地区发育有构造 圈闭和岩性圈闭。长2 地层发育厚度较大的分流间湾泥岩均充当了长2 油藏必备的遮挡和封盖层。
关键词: 叠前反演; 横波拟合; Xu-White 模型; 苏里格气田
冯昕鹏 , 李金付 , 聂建委 , 张超 , 李旭 . 姬塬地区延长组长2 油藏油气成藏条件研究[J]. 岩性油气藏, 2012 , 24(5) : 38 -42 . DOI: 10.3969/j.issn.1673-8926.2012.05.007
Jiyuan area is one of the key oil and gas exploration area within the basin. Based on the research of source rocks, reservoir rocks, hydrocarbon migration and traps, this paper synthetically analyzed the hydrocarbon accumulation conditions of Chang 2 oil reservoir set in Jiyuan area. The result shows that hydrocarbon of Chang 2 oil reservoir set mainly comes fromChang7 source rocks. The reservoir in the study area is mostly underwater distributary channel sand bodies, and sandstone is mainly composed of arkose, lithic arkose, with little feldspathic lithic sandstone, so it belongs to moderate porosity and low permeability reservoir. Compaction, cementation and dissolution are the main diagenesis types. The abnormal high pressure from Chang 7 oil reservoir set drives the oil generated from Chang 7 source rocks up to Chang 2 oil reservoir set. The oil in Chang 2 oil reservoir set is mainly trapped by structural-lithologic trap, with local area by structural trap and lithologic trap. The thick interdistributary mudstone developed in Chang 2 oil reservoir set plays the necessary role as the shield and cap rock ofChang2 oil reservoir set.
Key words: prestack inversion; S-wave fitting; Xu-White model; Sulige Gas Field
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