塔里木盆地古城鼻隆区非构造圈闭

NONSTRUCTURAL TRAPS IN GUCHENG NOSEUPLIFT AREA, TARIM BASIN

郭建华 翟永红 刘生国 罗传容

Guo Jianhua Zhai Yonghong Liu Shengguo Luo Chuanrong

古城鼻隆构造区石炭系底为一区域性不整合,其上广泛发育(1)与侵蚀面有关的沟谷体系,圈闭的优劣取决于底板地层,以中、上奥陶统最好,志留系次之。(2)鼻隆裙边国侵蚀强度形成砂岩超覆和砂砾岩超覆两类地层超覆圈闭,前者优于后者。

The Carboniferous basement of Gucheng nose-uplift area is a regional unconformity.The extensively developed overlying stratigraphic traps include: 1. Erosion-surface formedchannel-valley system stratigraphic traps. The trap properties depend on basements. It isconsidered that the basement of the Middle-Upper Ordovician is the best while that of theSilurian is secondarys 2. The fringe marginal overlap traps of the nose uplift. Different degrees of erosion result in sandstone overlap and gravel overlap. The former prevails over the later.

10.11743/ogg19950308