莺歌海盆地浅层CO_2岩石化学成因的可能性

A possible lithochemical origin of shallow CO_2 in Yinggehai basin

莺歌海盆地浅层砂岩中富含菱铁矿和粘土矿物 ,它们在较低温度下可以发生岩石化学反应而生成大量的CO2 ,这可能是该区浅层气藏中CO2 含量高的原因之一。

There are abundant siderite and clay minerals in the shallow sandstones in Yinggehai basin. Under lower temperature, a lithochemical reaction may occur between minerals, by which enormous CO 2 is produced. It may be the one of reasons why the shallow gas reservoir in the basin is high in CO 2 content.