CAJ | 학술논문

川西坳陷深层须家河组具有很大的资源潜力，但由于其特殊的地质背景，使得在部分地区的勘探进展不尽人意。为了明确川西坳陷须家河组气水分布的主控因素和成因机理，选取大邑地区上三叠统须家河组作为研究对象，在对须家河组段致密气藏特征研究的基础上，结合区域地质条件，总结了现今大邑地区须家河组气水分布规律；再在构造演化史的分析成果基础上对构造、断裂精细特征进行总结，研究气水分布的主要控制因素。研究结果表明，古今构造是复杂气水分布的基础，泥岩夹层影响了内部油水层分布，而储层非均质性决定了原油驱替地层水的能力。
천서요함심층수가하조구유흔대적자원잠력，단유우기특수적지질배경，사득재부분지구적감탐진전불진인의。위료명학천서요함수가하조기수분포적주공인소화성인궤리，선취대읍지구상삼첩통수가하조작위연구대상，재대수가하조단치밀기장특정연구적기출상，결합구역지질조건，총결료현금대읍지구수가하조기수분포규률；재재구조연화사적분석성과기출상대구조、단렬정세특정진행총결，연구기수분포적주요공제인소。연구결과표명，고금구조시복잡기수분포적기출，니암협층영향료내부유수층분포，이저층비균질성결정료원유구체지층수적능력。
The Xujiahe formation in West Sichuan Depression has a lot of potential ,but the exploring in this area is less than satisfactory due to the special geological background .In order to figure out the main controlling factor and the genetic mechanism of the Xujiahe formation in West Sichuan Depression ,our paper chooses the Xujiahe formation in Dayi area as the study object .Based on the study of tight gas reservoir characteristics of the Xujiahe formation ,combined with geological background ,the research summarizes the Gas-Water distribution regu-larities;then summarizes the characteristics of structure and fracture based on the analysis of regional structural evolution history ;studies the main controlling factor of Gas-water distribution .Our research highlights that the ancient -modern structure is the foundation of the com-plex Gas-water distribution ,and the mud interlayers influence the inner distribution of Gas -water ,and that the reservoir heterogeneity re-sults in the capacity of Oil-water displacement .