阿姆河右岸区块构造演化与成藏条件

Structural evolution and hydrocarbon pooling conditions in the Amu Darya Right Bank Block,Turkmenistan

前苏联针对土库曼斯坦阿姆河右岸区块做了大量工作,但所取得的地质认识尚不深入,尤其在区域构造演化史、圈闭及断裂形成机制与成藏关系等方面的认识较少,加上该区地质条件复杂,导致钻井勘探成功率低。针对上述问题,利用平衡剖面法和层拉平等技术,结合区域构造解释成果对区块的构造发展史进行了重新厘定;通过古构造的恢复明确了区域构造演化模式和碳酸盐岩沉积构造背景的差异;分析了古隆起对碳酸盐岩礁滩相储层的控制作用。进而分析了阿姆河右岸区块油气成藏条件,初步明确了该区的油气成藏模式。

The former Soviet Union had performed a large amount of research on the Amu Darya Right Bank Block,Turkmenistan.However,the geologic understandings obtained were still limited,especially in the regional structural evolution history,forming mechanisms of traps and fractures,as well as their relationships with hydrocarbon pooling.In addition,the geologic conditions in the study area are quite complex,resulting in a low success rate of exploratory drilling.To solve these problems,balanced section and flattening techniques,in combination with the regional structural interpretation results,are used to redefine the structural development history of the study area.The regional structural evolution patterns and sedimentary structural settings of carbonates are defined through paleotectonic reconstruction.The controlling actions of paleohigh on carbonate reservoirs of reef and bank facies are analyzed.The conditions and patterns of hydrocarbon pooling in the study area are recognized.