陈家庄凸起及北坡油气成藏差异性  

Differentiation of mechanisms and models of hydrocarbon accumulation in Chenjiazhuang uplift and its north slope

作　　者：彭传圣[1] 

机构地区：[1]中国地质大学(北京)能源学院,北京100083

出　　处：《油气地质与采收率》2011年第2期16-20,111-112,共5页Petroleum Geology and Recovery Efficiency

基　　金：国家科技重大专项"渤海湾盆地南部精细勘探关键技术"(2008ZX05006)

摘　　要：通过对陈家庄凸起及北坡的油源对比分析,将研究区原油分为3类:第Ⅰ类主要源于渤南洼陷沙四段上亚段烃源岩,混有少量沙一段的低熟原油;第Ⅱ类主要源于渤南洼陷沙三段烃源岩,混有少量沙一段的低熟原油;第Ⅲ类为源于渤南洼陷沙三段烃源岩的成熟原油。通过对陈家庄凸起及北坡地质结构、输导体系要素构成分析,该区自西向东输导体系类型依次为一元断裂横向型,由断裂、骨架砂体及不整合面构成的三元立体型,由断裂和骨架砂体构成的二元"网毯"型或二元"T"型。油气来源及输导方式的差异导致该区原油性质、油气藏类型与丰度存在较大差别。西段油气主要聚集于邵家断裂带附近的断块、断鼻及该断裂西部末梢的地层超覆圈闭之中,丰度较低,为普通稠油;中段油气富集于馆下段地层超覆与披覆背斜圈闭、沙河街组—东营组地层超覆与构造-岩性圈闭、潜山地层不整合圈闭等各类圈闭中,丰度高,为超稠油;东段油气主要在馆下段地层超覆圈闭及馆上段的构造-岩性圈闭中运聚成藏,丰度低,为普通稠油。Through the analysis on oil resource in Chenjiazhuang uplift and its north slope, the crude oil in this area can be classified into 3 different types:①crude oil coming mainly from the source rocks of upper Es4 mixed a little with low mature oil from Es1;②crude oil coming mainly from the source rocks of Es3 mixed a little with low mature oil form Es1;③the matured crude oilcame from the source rocks of Es3 in Bonan sag. By analyzing the tectonic structure and the composition of transportation pathway system factors in this area, we come to a conclusion that there are three different kinds of transportation systems from west to east: ①the fault-determined monistic structure; ②the ternary structure determined by faults, sand body framework and unconformity; ③the meshwork-carpet dualistic structure determined by faults and sand body framework. Different types of oil resource and transportation systems make the crude oil properties, reservoir types and oil abundance varied greatly. The western petroleum resource which are normal heavy oil and low abundance accumulated in the fault block traps, fault nose structures and stratigraphic overlap traps in the west end of the fault adjacent to the Shaojia fault zone, the middle petroleum resource which are ultra-heavy oil and high abundance accumulated in drape anticline traps, stratigraphic overlap traps in the lower Guantao formation, and drape anticlinal traps, buried hill and drape traps in Dongying formation and Shahejie formation, the eastern petroleum resource which are normal heavy oil and low abundance accumulated in the stratigraphic overlap traps in the lower Guantao formation and tectonic lithologic complex traps in the upper Guantao formation.

关 键 词：油源 输导体系 油气成藏 差异性 陈家庄凸起 

分 类 号：TE112.111[石油与天然气工程—油气勘探]