苏里格气田西部二叠系盒8-山1段天然气成藏过程及富集主控因素  

Gas accumulation process and main controlling factors of He-8 and Shan-1 Member in western Sulige gas field

作　　者：黄文明[1] 马文辛[1] 徐邱康 彭宇[1] 马斯辉[1] 韩翀[1] 彭湃[1] 刘雨 杜洋[1] 

机构地区：[1]中石油川庆钻探工程有限公司地质勘探开发研究院,成都610051 [2]中石油西南油气田分公司蜀南气矿,四川泸州646000

出　　处：《地质科学》2016年第2期521-532,共12页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：国家重大专项“四川盆地岩性油气藏富集规律与目标评价”（编号：2011ZX05001-005）资助.

摘　　要：苏里格气田西部的二叠系石盒子组8段（He-8）和山西组山1段（Shan-1）是主要的天然气产层，是致密砂岩准连续型气藏，气水关系复杂。本文通过岩石薄片、电镜扫描、生烃模拟、古构造恢复技术，分析总结了盒8段和山1段的油气基础地质条件和致密砂岩天然气成藏的主控因素，并将成藏过程分为4个阶段。结果表明较低生烃强度和东高西低的构造背景决定了现今大面积的含水局面，区块烃源岩（煤层厚度）、储层物性（规模和非均质性）和山1段隔夹层主要控制了局部天然气富集区（甜点）。晚期的新构造运动导致早期天然气藏中已形成的气水系统再分配、调整，从而造就了现今盒8段-山1段气藏复杂的气水格局。The study area is located in the west of Sulige gas field. He-8 and Shan-1 Members are the main producing layers, which belong to tight gas. The relationship of water and gas is very complex. Based on the combination of geological and geophysical methods, according to the thin sections, scanning electron microscope, hydrocarbon generation modeling, paleo-structure reconstruction, the oil and gas geological conditions and tight gas accumulation, main controlling factors are discussed, and the accumulation process is divided into four stages. This paper has come to that high water saturation is controlled by poor hydrocarbon generation and regional structural setting in the study area, and local gas-rich has mainly due to the local block source rocks （ thickness of coal layers） , reservoir properties （ scales and heterogeneity） and compartment of Shah-1 Member of Shanxi Formation. New tectonic movement in late period has caused the redistribution of gas, and the gas-water relationship has been modified in the previous gas pools. It resulted in the complex gas-water distribution framework of He-8 and Shan-I Members in recent gas pools.

关 键 词：石盒子-山西组 二叠系 天然气成藏 致密砂岩气 苏里格气田 

分 类 号：TE122.3[石油与天然气工程—油气勘探]