窑街矿区煤成气及其储集条件  

COAL-DERIVED GAS AND ITS RESERVIOR CONDITIONS IN YAOJIE MINING AREA, GANSU PROVINCE

作　　者：张庚申 杜利平 

机构地区：[1]甘肃煤田地质勘探公司149队,天水741002

出　　处：《煤田地质与勘探》1992年第2期30-35,共6页Coal Geology & Exploration

摘　　要：窑街矿区煤系中的暗色泥岩、油页岩、煤层和泥灰岩是生成天然气的烃源岩,研究其地球化学特征和煤岩特征并据此确定了该区天然气的成因类型。研究表明,该区天然气是窑街群中的烃源岩经过漫长的地质作用演化而来,它们经过运移,储存于煤系砂岩的孔隙和基岩裂隙中,在有利于储油气圈闭里,形成了小型的油气藏。Dark mudstone、oilshale、coal seam and marl in coal—bearing formation are hydrocarbon source rock which originates natural gas. In this paper, the authors studied their geochemical and coal petrological properties, and determined genetic type of the natural gas in Yaojie mining area on the basis of this. Coal—derived gas reservoired in Yaojie mining area has evolved from hydrocarbon source rock during very long geological history. It was reservoired in small opening of sandstone or bedrock crack in coal—bearing formation. It can be formed small type oil—gas reservoir in contributed ressrvoir oil—gas trap.

关 键 词：矿区 煤 成气 储层 储集条件 

分 类 号：P618.130.1[天文地球—矿床学]