【摘要】 以塔河碳酸盐岩缝洞型油藏为原型,研究并形成了岩溶相控多尺度缝洞储集体二步法建模新技术,即在古岩溶发育模式控制下,采用二步法建模:第1步建立4个单一类型储集体离散分布模型,利用地震识别的大型溶洞和大尺度裂缝,通过确定性建模方法,建立离散大型溶洞模型和离散大尺度裂缝模型;在岩溶相控约束下,基于溶洞发育概率体和井间裂缝发育概率体,采用随机模拟多属性协同模拟方法,建立溶蚀孔洞模型和小尺度离散裂缝模型;第2步采用同位条件赋值算法,将4个单一类型模型融合成多尺度离散缝洞储集体三维分布模型。该模型在三维空间定量表征了缝洞储集体的展布特征,为油田开发奠定了坚实的地质基础。更多还原

【Abstract】 Taking Tahe fractured-cavity carbonate reservoirs as the prototype,a new technology of the two step modeling controlled by karst facies of multi-scale fractured-cavity reservoir is developed. It is a two step modeling method under the control of the ancient karst development mode: the first step is the establishment of four discrete distribution models of a single type of reservoir, namely, using the seismic identification and description of the results, to establish a large cave discrete distribution model and a large-scale fracture discrete distribution model. With the karst facies constraints, based on the probability of caves and fractures to be developed between the body and the wells, and the multi-attribute co-simulation, the dissolved pores stochastic model and the small scale fractures discrete model are built. In the second step the parity condition assignment algorithm is used, to integrate the four single types of models into a multi-scale discrete fractured-cavity reservoir 3D distribution model. The quantitative model in 3D space to characterize the distribution feature of the fractured-cavity reservoir may serve as a solid geological foundation for the oilfield development.更多还原