鄂尔多斯盆地西峰油田白马南特低渗岩性油藏储层地质建模

以鄂尔多斯盆地西峰油田白马南长81砂岩油藏为例，应用随机序贯高斯模拟法（SUS）和序贯指示模拟法（SIS）建立研究目标的储层地质模型，进而探讨了在特低渗岩性油藏中相对高渗透储层形成的控制因素。认为长81油藏储层的形成主要受控于沉积作用；成岩作用对改善储层物性及油气的运聚起了重要的作用。砂体的三维模拟结果显示主砂体位于研究区西部，呈西南-东北向展布。储层物性参数的三维模拟也表明优质储层主要分布在主砂体带上长石溶蚀相和绿泥石薄膜胶结成岩相区。

Reservoir Geology Model of Lithological Reservoir with Low Permeability in Xifeng Oilfield, Ordos Basin

Taken Chang 81 reservoir of Baimanan area,Xifeng Oilfield,Ordos Basin as an example,established the geologic models of Chang 81 reservoir by using the stochastic methods of Sequence Guass Simulation and Sequence Indicator Simulation,and then discussed the controlling factors of relative high permeable layer that formed in very low permeable lighological reservoir.The research results indicated that the sedimentary process was the most important reason why Chang 81 reservoir was made.The diagenesis and the fractures had also great influence on improving the reservoir properties and the migration of petroleum.The 3-D model of sandstone distribution revealed that the main sand-body which lied in the west of the region of interest appeared to be a band with the direction from southwest to northeast.The results of stochastic modeling of the reservoir property indicated that the distribution of high-quality reservoir which was matched with the regions of feldspar dissolution diagenetic facies and chlorite film cementation diagenetic facies in the main sand-body was mainly controlled by the sedimentation and the diagenesis of the research area.