土库曼斯坦阿姆河右岸地区断裂特征及其控藏作用

钻井和地震剖面解释资料表明，土库曼斯坦阿姆河右岸地区发育了早期基底正断层、晚期盐下逆冲断层与盐上走滑断层及长期活动断层。早期基底正断层是由海西-印支伸展构造运动形成的，发育在古隆起构造带边缘；晚期盐下逆冲断层与盐上走滑断层是喜马拉雅挤压构造运动形成的，发育在盐膏岩厚度大、挤压应力强的地区；长期活动断层是早期基底正断层在喜马拉雅期挤压构造运动中继续活动形成的，发育在盐膏岩厚度薄、挤压应力弱的地区。早期基底断裂控制了烃源岩的分布，晚期盐上断裂未破坏盐膏岩盖层保存条件，晚期盐下断裂提供了圈闭条件，长期活动断裂破坏了盐膏岩盖层保存条件，对油气聚集不利。

Fault Characteristic and Reservoir-Control Effect in Amu Darya Right Bank Area in Turkmenistan

It was shown from drilling data and seismic profile interpretation information that in Amu Darya right bank area in Turkmenistan, there existed the early basement normal faults formed by Hercynian?Indosinian expanding movements and found in the margin of the paleo?uplift structural zone; the late subsalt thrust faults and up?salt strike?slip faults formed by Himalayan compressional movement and found in the area with thick salt gypsum rock and big compressive stress, and the long?term active faults which were formed by continuous activities of the early basement normal faults in the process of Himalayan compressional movement and found in the area with thin salt gypsum and weak compressive stress. It is concluded that the distribution of hydrocarbon source rocks is controlled by the early basement faults; the conditions of salt gypsum cap rock preservation have not been damaged by the late up?salt faults; it is the late subsalt fault that provides the conditions for forming trap rocks; the long?term active faults may result in damages of preservation conditions for salt gypsum trap rocks, which are unfavorable for the hydrocarbon accumulation in this area