涠西油气突破区古地貌演变和源汇体系特征及下步勘探方向

Palaeogeomorphology Evolution, Characteristics of Source to Sink System and Exploration Direction in the Weixi Block of Sinopec

黄建军 张百涛 张萍 王修平

HUANG Jianjun ZHANG Baitao ZHANG Ping WANG Xiuping

中国石油化工股份有限公司上海海洋油气分公司勘探开发研究院, 上海 200120

Institute of Exploration and Development, SINOPEC Shanghai Offshore Oil & Gas Company, Shanghai 200120, China

涠西探区A井获得油气突破，是在十多年来研究人员对该探区区域油气地质条件和成藏地质条件反复认识、去伪存真的过程中取得的。A井位于涠西南低凸起西斜坡、涠西南-海中凹陷D洼东侧缘，该区域的古地貌演变和源汇体系特征直接决定着A井油藏的油气成藏规律及后继勘探部署方向。此文利用区域宽线二维地震资料及三维连片地震资料对区域古地貌演变和源汇体系进行系统分析，在此基础上重点对涠西南低凸起的古地貌演变和源汇体系特征进行解剖，认为在探区获得油气突破后，应采取“先精细解剖D洼，后重新评价海中”的方案，尽快扩大涠西探区的油气发现局面。

The breakthrough of petroleum exploration in the Weixi Block of Sinopec is due to the petroleum geologists who have devoted to the repeated recognition and practice in the regional petroleum geology and geological conditions for hydrocarbon accumulation, and tried to eliminate the false and detain the true in this area in more than ten years. Well A is located at west slope of Weixinan low uplift, to the east side of D low-lying area of Weixinan-Haizhong Sag. Palaeogeomorphology evolution and characteristics of source to sink system play an important role in the hydrocarbon accumulation and the deployment of successive exploration activities in this area. From the regional study of palaeogeomorphology evolution and characteristics of source to sink system based on the interpretation of regional 2D seismic lines and 3D data, the authors conducted more detailed study on the evolution and characteristics in Weixinan low uplift. It is suggested that the exploration scenario of detailedly studing D low-lying area first and then re-evaluating Haizhong Sag is helpful to accelerate the exploration and development in Weixi.

https://doi.org/10.3969/j.issn.1008-2336.2016.02.001