大路沟地区长22辫状河储层构型研究

Study on the Reservoir Structure of Chang 22 Braided River in Dalugou Area

鄂尔多斯盆地大路沟地区延长组油气资源丰富,由于该区地层开采历史较长,含水度较高,产油率较低,开采的主要矛盾已经由小层之间的矛盾转变为砂体内部构型之间的矛盾,因此开展储层构型方面的研究是十分必要的。以长22为例,对该区储层构型进行划分,论述了心滩和辫状河道的特征,在此基础上对构造运动、气候条件、河水流量等因素进行控制,从而为油田二次开发方案的调整奠定了坚实的理论基础。

Yanchang formation in Dalugou area of Ordos basin is rich in oil and gas resources. Due to long development history, high water content and low oil production rate, the main contradiction of development has changed from the contradiction between single layers to the internal structure of sand bodies, so it is necessary to carry out research on the reservoir structure. Taking Chang 22 as an example, the reservoir structure of this area was divided, and the characteristics of the braided bar and the braided channel were discussed. On this basis, the tectonic movement, climatic conditions, river flow and other factors were analyzed, which could lay a solid theoretical foundation for the adjustment of oilfield secondary development program.