Title

Evaluation of Hydrocarbon Accumulation Conditions of Fault-related Traps in D Sub-sag of Weixinan Sag Based on Fuzzy Mathematics

作者

黄苏卫戚家振刘峰

Authors

HUANG Suwei QI Jiazhen LIU Feng

单位

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

Organization

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

摘要

涠西南凹陷D洼经历多期构造运动，断裂发育，断块圈闭是最重要的圈闭类型，同一构造不同断圈或者同一断圈不同层圈闭含油气性复杂，优选勘探部署圈闭风险较大。通过储层发育特征、油气充注特征、断裂侧向封堵特征以及断-盖耦合垂向封盖特征四个断圈成藏评价地质因素的确定，基于模糊数学方法，对断圈成藏条件进行了定量化评价。研究表明，当成藏的综合评价值D≤0.618时为超高风险断圈，当0.618

Abstract

D Sub-sag of Weixinan Sag has experienced several intense tectonic movements. Multistage faults are developed. The fault-related trap is the most important type of hydrocarbon-bearing traps. Hydrocarbon accumulation conditions are complex in different traps and horizons. Exploration target optimization has high risks. Based on the fuzzy mathematics evaluation, this paper recognized reservoir characteristics, charge modes of oil and gas, lateral sealing ability of faults and spatial matching types between faults and caprocks as the key geological factors controlling the hydrocarbon accumulation, and quantified the evaluation of the four factors. The results show that when the comprehensive evaluation value D≤0.618, it is a super-high risk trap. When 0.618

关键词：

断圈; 模糊数学; 成藏条件评价; 涠西南凹陷;

Keywords:

fault-related traps; fuzzy mathematics; evaluation of accumulation conditions; Weixinan Sag;

基金项目

DOI

https://doi.org/10.3969/j.issn.1008-2336.2022.01.019

基于模糊数学方法的涠西南凹陷D洼断圈成藏条件评价