华北克拉通分割与华北平原上古生界含气问题

华北克拉通在涨西运动期及以前是统一的地块,由于印支,燕山和喜马拉雅期,主要从西向东的构造挤压力和东部的构造拉张力联合作用,把克拉通分割成六个块体,从西向东为阿拉善,鄂尔多斯,山西,河淮,胶辽和北部的内蒙（古）。华北平原即河淮块体,没有统一的完整基岩,而是由众多断层切割成隆坳相间状态,北部称渤海湾盆地,南部为南华北盆地,而平原区还占据鲁西南隆起部分地区。平原中石炭－二叠系已发现“自生自储”的苏桥气田和“古生新储”的主主义少四段气藏。全区烃源条件良好,当前勘探工作的中心是选准突破口,以便找到大,中型气田,特别在南华北盆地的意义更大。

Segmentation of North China craton and gas- bearing problem in upper Palaeozoic of North China Plai

The Craton in North China was an united land block in Hercynian movement or earlier and it is segmented to six blocks by the combined action of tectonic extrusion stress from west to east and tension stress in east mainly in Indosinian, Yanshan and Himalayan epoch, i.e,Alashan, Ordos, Shanxi, Hehuai, Jiaoliao and northern Inner Mongolia from west to east. North China Plain is Hehuai block with no united complete base rocks but with uplift and depression segmented by numerous faults where Bohaiwan basin in the north, south North China basin in the south and plain area occupied part of Luxinan uplift. "Autogeneous and self?accumulation" Suqiao gas field and "palaeogeneous and new accumulation" Es 4 gas reservoir of Wenliu are found in the middle Carboniferous?Permian of the plain. The condition of hydrocarbon source in the whole area is good. The central task of the current exploration is to find out a breach to discover large or medium gas fields. South North China basin is of more significance.