伊通盆地岔路河断陷油气二次运移模拟  

Modeling of Hydrocarbon Secondary Migration in the Chaluhe Sag,Yitong Basin

作　　者：唐文旭[1] 曹强[1,2] 

机构地区：[1]中国地质大学资源学院,湖北武汉430074 [2]中国地质大学构造与油气资源教育部重点实验室,湖北武汉430074

出　　处：《地球科学（中国地质大学学报）》2014年第6期741-750,共10页Earth Science-Journal of China University of Geosciences

基　　金：中央高校基本科研业务费专项资金资助项目"伊通盆地晚渐新世以来压扭构造活动的油气二次运移响应"(No.2012029135);国家自然科学基金项目"残余盆地古流体动力场演化"(No.40172051);"构造与油气资源"教育部重点实验室开放基金项目(No.TPR-2011-33)

摘　　要：以伊通盆地岔路河断陷含油气系统研究为基础,应用二维(2D)盆地模拟方法,对伊通盆地岔路河断陷内主要生储组合E2s(油源)-E2s(储层)的油气二次运移演化历史进行了模拟恢复;并依据区内油气汇聚区带的平面分布特征划分油气运聚单元,基于此对各运聚单元内的烃源条件、输导体系、保存条件等油气成藏条件进行综合对比.研究表明:(1)岔路河断陷含油气系统要素配置关系良好,且发育3期油气成藏,E2s-E2s(!)为已证实的最重要的含油气系统;(2)岔路河断陷势能场分布控制了同期油气二次运移方向和强度,区内主成藏期油气二次运移范围广、强度(流线密度)大,有利运移指向区主要集中于西北缘盆缘断裂附近和东部的万昌、梁家构造带之内的油气低势区;(3)岔路河断陷可划分为4个油气运聚单元(Ⅰ、Ⅱ、Ⅲ和Ⅳ),运聚单元II的成藏条件最为优越,而运聚单元Ⅰ内的万昌构造带围斜地区亦可作为本区有利勘探区带.Based on the analyses of petroleum systems in the Chaluhe sag, hydrocarbon secondary migration in thesource- reservoir assemblage （E2s-E2 s） was evaluated by using 2D basin modeling technique. This study aims to investigate the individual hydrocarbon migration-accumulation units, analyze different conditions for the hydrocarbon accumulation, and locate possible favorable areas as exploration targets. The following conclusions are drawn： （1） Key geologic elements of the petroleum systems are well integrated in the Chaluhe, three events of hydrocarbon accumulation can be identified, and the E2 s-E2 s （!） is recognized as the most significant petroleum system in the study area. （2） Secondary migration direction and intensity were mainly controlled by the fluid potential energy field. Hydrocarbon accumulation during the main period of hydrocarbon migration was characterized by wide distribution and high density. Hydrocarbon fluids mainly charged two areas with lower fluid potential, namely along the northwest basin-marginal fault and the eastern Wanchang, Liangjia uplifts, respectively. （3） The Chaluhe sag consists off our hydrocarbon migration-accumulation units, including units Ⅰ、Ⅱ、Ⅲ and Ⅳ. Unit Ⅱ has the best potential for hydrocarbon migration and accumulation, followed by unit Ⅰ. The periclinal area in the Wanchang uplift ranks to be the most favorable area for oil and gas exploration in the Chaluhe sag.

关 键 词：伊通盆地 岔路河断陷 盆地模拟 烃 运聚单元 石油地质 

分 类 号：TE122[石油与天然气工程—油气勘探]