新疆吐拉盆地构造特征与含油气评价

吐拉盆地侏罗纪时是柴达木盆地的一部分,其原型盆地是北断南超的箕状坳陷,由于新生代阿尔金断裂带的左行走滑活动,形成吐拉盆地现今构造面貌。吐拉盆地侏罗系暗色泥岩发育,有机质丰度较高,正处于生油高峰阶段,应具有生成油气藏的地质条件。吐拉巨厚油砂岩的发现,证明吐拉盆地已经生成一定规模的油气藏,建议进一步开展吐拉盆地的油气勘探。

THE TECTONIC FEATURES AND THEIR APPLICATION TO OIL\|GAS POOL ASSESSMENT OF THE TULA BASIN, XINJIANG, NW CHINA

Tula basin was part of the Qaidam basin in Jurassic Period. The prototype of the Tula basin was a half\|graben\|type depression where the graben fault is located in the north and overlapped in the south. Because of the strike-slip movement of the Altyn fault zone in Cenozoic the existing structural configuration has been formed. There is very thick Jurassic dark-mudstone in the Tula basin, and the organic abundance is high. It is not only in the peak period of oil generation at present, but have the geological conditions to form oil\|gas pool are ready in the Tula basin. The discovery of the mega\|thick oil\|bearing sandstone in Tula basin demonstrates that the Jurassic System in the Tula basin had generated a certain amount of hydrocarbon. So the Tula basin is a target oil\|and gas\|bearing basin with a great prospect for further exploration.