中国北方石炭——二叠系油气远景浅析

Brief Analyses on Carboniferous-Permian Hydrocarbon Prospective Area in the North of China

中国北方石炭———二叠系地层沉积在被动大陆边缘张性裂谷环境下 ,天山———兴蒙海槽的沉降 -褶皱 -隆升过程控制了派生盆地的形成和发展演化 ,也为坳陷、断陷及其边缘地区的油气成藏提供了有利条件。裂谷体系下硅质碎屑岩细粒沉积、碳酸盐岩沉积成为具良好生油潜力的烃源岩 ,不整合、断裂体系的产生为烃类运移提供有利的通道 ,同时有助于提高岩层的储集性能 ,构造运动的褶皱回返在山前坳陷附近形成的构造圈闭、台地边缘斜坡带的地层圈闭和透镜体圈闭都是油气聚集的有利场所 ;

During the course of carboniferous-permian, the tensile passive continental margin is background of deposition in north china. The sedimentation, folding and uplift control the formation and development of derived basins. The sag, fault depression and frontier area are future fields of hydrocarbon. Generating rocks include kiesel granule clasolite and carbonatite sediment under rift-system. Unconformity and fault are migration pathways and make for improvement of reservoir bed. The tectonic trap in piedmont depression, stratigraphic trap and lens trap in mesa margin are preferable fields of oil & gas. Furthermore, carbonatite weathering crust and deep-gas are also the valuable area.