阜新盆地王营水动力圈闭裂隙型气藏的形成机制  

FORMATION MECHANISM OF THE FRACTURED GAS RESERVOIR IN WANGYING HYDRODYNAMIC TRAP IN FUXIN BASIN

作　　者：李明潮[1] 王绳祖[1] 雷崇利[1] 李玉林[1] 杨锡禄[1] 

机构地区：[1]煤炭科学研究总院西安分院

出　　处：《天然气工业》1999年第5期17-21,共5页Natural Gas Industry

摘　　要：王营煤矿位于辽宁省西部阜新盆地，该煤矿巷道的辉绿岩墙旁侧裂隙带发生天然气涌出已十余年，目前仍在继续。为了查明气源和资源前景，运用构造分析、气组分同位素特征等方法进行了研究，结论是：①盆地中基底断裂通过矿区，控制了王营同沉积向斜的形成，进而形成负花状构造；王营负花状构造与东梁正花状构造毗邻，说明它们可以在同一构造带生成，因为形成的力学机制相同，产生差异可能是其它因素复合作用的结果。②王营纯水动力圈闭裂隙型气藏规模虽小，但证据确凿，是一种新的气藏类型。③裂隙气源主要是煤层气，亦有幔源氦加入。④阜新盆地属郯庐断裂带范畴，不能排除该类断陷盆地中有幔源氦气积聚成藏的可能。Wangying coal mine is located in the Fuxin Basin in the west of Liaoning Province.Up to now the natural gas has gushed out from the fracture zone beside the diabasic dike in the tunnel of the mine for more than ten years.In order to detect the gas source and resource potential,through research by use of the methods such as structural analysis and isotopic property of the gas component,etc.,it is concluded that ① in the basin,the basement fault passing through the mining district controlled the formation of the Wangying syndepositional cyncline,thus forming a negative flower shaped structure;the Wangying negative flower shaped structure is near to the Dongliang positive flower shaped structure,which indicates that they were formed in the same structural belt because of the identical formation mechanism and the complex effect of the other factors could make them some difference;② although the fractured gas reservoir in Wangying hydrodynamic trap is small,it has been fully proved,being a new category of gas reservoir;③ the gas in fractures mainly came from the coal bed gas,containing mantle source helium;and ④ the possibility of accumulating the mantle source helium to form a reservoir in such kind of fault depression can't be denied because the Fuxin Basin occupies a part of the Tanlu fault belt.

关 键 词：阜新盆地 水动力圈闭 煤成气 气藏形成 圈闭型 

分 类 号：P618.130.2[天文地球—矿床学]