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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。
Taking Tahe carbonate rock fractured-hole reservoir as a prototype, a new two-step modeling technique for karst facies control multi-scale fractured cave reservoirs was developed. Under the control of the ancient karst development model, a two-step method Modes: In the first step, four discrete reservoirs of single-type reservoir models are established. Large-scale karst caves and large-scale fractures identified by seismic identification are used to establish discrete large-scale karst caves and discrete large-scale fracture models through deterministic modeling. Constraints, based on the probability of karst development body and the probability of well development between wells, using random simulation multi-attribute collaborative simulation method to establish the dissolution hole model and small-scale discrete fracture model; the second step using the co-occurrence assignment algorithm, the four single-type The model is integrated into a three-dimensional distribution model of multi-scale discrete cavern reservoirs. The model quantitatively characterizes the distribution characteristics of fracture-cave reservoirs in three-dimensional space and lays a solid foundation for oilfield development.