源储侧接式油气侧向运移路径厘定方法及其应用  

Determination method and its application for source-reservoir side-connected lateral hydrocarbon migration path

作　　者：王军体 WANG Junti(Pucheng Oil Production Plant of Sinopec Zhongyuan Oilfield Company,Puyang 457532,China)

机构地区：[1]中国石化中原油田分公司濮城采油厂,河南濮阳457532

出　　处：《大庆石油地质与开发》2022年第1期48-55,共8页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家自然科学基金项目“砂泥岩层系中油源断裂输导油气优势路径演化及识别研究”(41872157);“断砂配置侧向分流运聚油气机理及有利部位识别研究”(42072157)。

摘　　要：为了研究含油气盆地源储侧接式油气分布规律,在源储侧接式油气侧向运移所需条件及路径研究的基础上,通过确定油源断裂两侧源岩和储层侧接长度,确定断裂供烃窗口;通过确定不整合渗漏区和源岩排烃分布区,确定不整合面供烃窗口;通过确定储层砂体连通分布区和顶面古构造脊,确定储层砂体侧向运移路径;将供烃窗口和砂体侧向运移路径二者组合,建立了一套源储侧接式油气侧向运移路径的厘定方法,并将其应用于海拉尔盆地乌尔逊凹陷南部铜钵庙组油气侧向运移路径的厘定中。结果表明:乌南地区铜钵庙组油气侧向运移路径主要分布在其东北部,其次是南部,主要由不整合面供烃窗口和砂体侧向运移路径构成,在东南及北部仅有少数油气侧向运移路径是由断裂供烃窗口和砂体侧向运移路径构成的。这些油气侧向运移路径分布部位有利于铜钵庙组油气聚集成藏,与目前乌南地区铜钵庙组已发现油气分布相吻合,表明该方法用于源储侧接式油气侧向运移路径的厘定是可行的。In order to study source-reservoir side-connected oil and gas distribution in petroliferous basins,based on studying necessary conditions and paths for source-reservoir side-connected lateral hydrocarbon migration,the hydrocarbon supply window of oil source fault is determined by determining the source-reservoir side-connection length on both sides of the fault,the hydrocarbon supply window of unconformity is determined by determining unconformity leakage area and source rock hydrocarbon expulsion distribution area,and the lateral migration path of reservoir sand body is determined by determining the connected distribution area of reservoir sand body and paleostructural ridge on the top surface.By combining hydrocarbon supply window with lateral migration path of sand body,a set of methods for determining source-reservoir side-connected lateral hydrocarbon migration path is established and applied to determine the lateral migration paths of K1t in southern Wuerxun Sag of Hailar Basin.The results show that the lateral migration paths of K1t in southern Wuerxun area are mainly distributed in the northeast,secondly in the south,mainly composed of unconformity hydrocarbon supply windows and sand bodies lateral migration paths,with only a few lateral migration paths in southeast and north composed of fault hydrocarbon supply windows and sand bodies lateral migration paths.These lateral migration paths are favorable for oil and gas accumulation in K1t,being consistent with the oil and gas distribution found in K1t in southern Wuerxun area,indicating that this method is feasible for source-reservoir side-connected lateral migration paths.

关 键 词：源储侧接式 油气侧向运移路径 厘定方法 乌尔逊凹陷 

分 类 号：TE122[石油与天然气工程—油气勘探]