塔里木盆地库车坳陷依南2气藏特征解析  

ANALYZING THE CHARACTERISTICS OF YINAN-2 GAS RESERVOIR IN KUCHE DEPRESSION OF TALIMU BASIN

作　　者：刘玉魁[1] 邬光辉[1] 胡剑风[1] 王建宁[1] 郑多明[1] 吴建国[1] 

机构地区：[1]中国石油塔里木油田分公司勘探事业部

出　　处：《天然气工业》2004年第7期12-14,18,共4页Natural Gas Industry

摘　　要：“深盆气藏”是由一种“气水倒置”的特殊圈闭形成的非常规天然气聚集 ,构造平缓、储层致密和具有不间断供气的气源是其形成的主要条件。研究认为 ,库车坳陷依奇克里克构造带的依南 2气藏为“深盆气藏”。依南 2气藏产气层段为致密砂岩 ,发育于一向南倾的单斜背景之上 ,处于构造的下倾部位 ,存在生气量巨大的侏罗系—三叠系大套煤系地层。同时依南 2气藏又具有气水倒置、含气饱和度高及异常高压的特点。依南 2气藏在形成过程中 ,气源向致密砂岩充注时 ,运移的主要方式以扩散作用为主。具备了形成深盆气藏的地质条件。'Deep Basin Gas Reservoir' is an unconventional gas accumulation formed' in a special trap with an upside-down relation of water to gas and its formation conditions include mainly a gentle structures tight reservoir and an unceasingly outputting gas source. Through investigation, it was considered that the Yinan-2 gas reservoir of Yiqikelike Structural Belt in Kuche Depression belongs in a 'Deep Basin Gas Reservoir', because its gas-producing interval is composed of tight sandstones, it is situated on the down-dip portion of a west-tilted monocline and there exist massive Jurassic - Triassic coal measure strata being able to generate a vast amount of gas. Mean while, this gas reservoir is characterized by the upside-down relation of water to gas and the high gas saturation and abnormal high formation pressure. When the gas was charged into the tight sandstones, the migration mode was mainly diffusional effect in the procoss of reservoir formation. To sum up, the Yinan-2 trap was of the geological conditions of forming 'Deep Basin Gas Reservoir'.

关 键 词：塔里木盆地 库车坳陷 深盆气藏 煤层 泥岩 异常高压系统 

分 类 号：P618.13[天文地球—矿床学]