中国西部陆壳与含油气系统基本特征  

CONTINENTAL CRUST AND BASIC CRARACTERISTICS OF PETROLEUM SYSTEM IN WESTERN CHINA

作　　者：郭占谦[1] 徐文发[1] 彭威[1] 

机构地区：[1]大庆石油管理局勘探开发研究院,黑龙江大庆163712

出　　处：《新疆石油地质》1999年第5期365-370,共6页Xinjiang Petroleum Geology

摘　　要：中国大陆地壳的核心──中国地台区是全球九大地台区中面积最小的一个，是唯一一个东西延伸的地台，是在整个地球发展史中始终受挤的陆壳。侏罗纪以来，由于太平洋板块的生成，中国大陆岩石圈处于四面受挤的地球动力环境中，使中国陆壳成为新构造运动最活跃的陆壳，中国西部成为新构造运动最活跃的地区。从而，使中国西部含油气盆地地表油气苗发育；可能具有有机成因与无机成因油源；商业油气层出现在膏盐层与铝土矿层等好的盖层之下，油气田多沿活动断裂分布；表明与东部含油气盆地油气田受生油区控制的源控型含油气系统不同，表现为保技型含油气系统。因此，油气勘探原则也应有别于东部，应采用“沿着盆地（隆起）边缘钻探，占高点、打屋脊，地面显示是导引”的办法，可能是投入少而效果好的勘探原则。Chinese plaiform-the core of China's continental crust is the smallest one among the nine major platforms in the world, the only one extending EW, and the continental crust under long-term compression in the whole evolution history of the earth. Since Jurassic, the lithosphere on Chinese continent is located in geodynamic environment of extrusion in four sides as the Pacilic plate formed, enabling the Chinese continental crust to be the most active in new tectonic movemellt, the westem China to be themost active area of new tectonic movement. Therefore, oil seepage occurs plentifully in the petroliferous basins in western China, possibly including organic and inorganic origins. Commercial oil-bearing layers are present beneath the halite and bauxite. Oil(gas) field mostly occurs along active faults. These indicate that petroleum system in western China is of preservation-conbolled type, differing from source-controlled one in eastern China. Therefore, hydrocarbon exploration guideline is different.

关 键 词：中国 大陆地壳 地壳运动 活动断层 油气相 

分 类 号：P618.130.2[天文地球—矿床学] P542[天文地球—地质学]