川西拗陷上三叠统断层封闭性研究

本文用裂缝充填物、碳氧同位素、声发射、包体均一温度测定等方法确定川西拗陷上三叠统断层形成期次,研究其与油气演化的匹配关系;用钻井、流体性质、地层压力、断层面剖面图、断裂带地面调查等多种方法和资料,综合研究该区内断层的纵向、横向及有效封闭性。并进行区域评价,指出了封闭条件差、中等、好、极好的地区,为提高勘探效益提供了直接铱据。

Study of Fault confining of the early Triassic period in West Sichuan Depression Areas

This paper determines the complicated sequence of the early Triassic Period faults in WestSichuan by the methods of fracture filling,carbon-oxygen isotope,sound emission,even temperature determination of wrap,etc,and studies the matching relation between the se-quence and the oilgas evolution.The length and breadth of the fault and their valid confin-ing are comprehensively studied by many methods and data,such as fluid cahracter,layer stress,section of fault plane,ground survey in fault zone.In addition,the paper makes an area assessment and points out the areas of different confining conditions,providing direct basis for improving exploration benefit.