塔河油田奥陶系缝洞型碳酸盐岩储集层三维地质建模

塔河油田奥陶系碳酸盐岩油藏是以溶蚀孔洞及裂缝为主要储集空间的古岩溶型储集层，储集层非均质性极为严重。为制定试验区稳油控水综合治理方案，运用地震方差体技术、云变换技术、岩溶相控建模技术等综合地质、地球物理和油藏工程资料，通过构造建模、岩溶建模、属性建模、裂缝分析及模型分析筛选开展储集层三维地质建模研究，改善了缝洞型碳酸盐岩储集层三维地质随机建模方案，为该区油藏精细描述和数值模拟提供了合理的地质模型。随机模拟结果表明，塔河油田奥陶系碳酸盐岩有利储集层与构造高部位存在一致性，且储集体的发育与构造变形程度及岩溶作用有关；孔隙度和渗透率的值均较低，分布具有随机性，整体表现为北东高，向南变低的趋势，由浅到深随井数减少不确定性增加，图9参16.

3D modeling of Ordovician fractured-vug carbonate reservoir, Tahe Oilfield

Fractured-vug carbonate reservoir is the main reservoir of Ordovician carbonate reservoirs of Tahe Oilfield; this highly heterogeneous reservoir has gone through a long geological time and complex structural movements. In order to design a comprehensive scheme of stabilizing production and controlling water for the pilot area, 3D geological models are established by using variance from seismic, karst facies control modeling, cloud transform technology etc. to combine geological, geophysical, reservoir engineering data. The distribution of the reservoir is predicted by structural modeling, karst modeling, property modeling, fracture analysis, and model analysis. A more geologically reasonable model for the reservoir simulation is got using this adjusted modeling. The favorable reservoir is in conformity with the upper part of the structure in the area, and the reservoir development and the structural deformation degree relate to karstification. Both porosity and permeability are low and their distribution is random.