孤西低潜山挤压构造研究及石油地质意义

Compressional structure of Guxi buried low hill and its petroleum significance

通过对孤西低潜山钻遇的挤压构造进行分析,发现该区逆断层具有上盘下古生界存在地层倒转,下盘断面附近上古生界见火成岩体沿层楔状侵入,逆断层或被正断层切割或沿部分逆断层面"反转"等特征;产生了挤压构造走向与区域构造走向一致,其形成与区域构造有着密切联系,正断层活动破坏了原来挤压构造的认识;指出对挤压构造进行研究,对区域上古生界地层划分、区域构造成因分析及该潜山的进一步研究,都具有重要的石油地质意义。

Through the research of the compressional structure drilled in Guxi buried low hill, it is discovered that the reversed fault is characterized by the upturning of beds in Low Paleozoic of the hanging wall, wedge invasion of igneous rock along the level in Upper Paleozoic near the bottom wall fractured surface. The reversed faults either were cut by the normal faults or were inversion along the partial thrust planes, which created that the compressional construction trends were accordant with the regional structural trends. That is closely related to the generation of regional structures. The normal faulting damaged the cognition of original compressional construction. The research of compresstional construction has the quite important petroleum significance for the stratigraphic classification of Paleozoic in region, origin analysis of regional structure and further study of the buried hill.