储集层参数随机建模方法在扇三角洲储集层非均质性研究中的应用

扇三角洲储集层在中国陆相盆地中广泛分布，各种亚相砂体的非均质性严重。在郯庐断裂带中段潍北盆地灶户鼻状构造带主力油层孔一段、孔二段扇三角洲相储集层的非均质性研究中，综合确定性建模和随机建模方法，建立其扇三角洲沉积相模型和物性参数模型；根据地质统计学变差函数和随机模拟理论，运用序贯指示模拟方法，建立沉积微相模型；同时利用分形克里金插值理论，建立了孔隙度和渗透率的分形几何模型。对各种模型进行的比较显示，克里金模型较好地表现了物性参数的整体趋势；序贯指示模拟较好地再现了储集层非均质性；而分形克里金模型既反映了储集层宏观物性分布，又反映了其内部非均质性变化。图6表1参12

Application of stochastic simulation of reservoir parameters on heterogeneity in fan delta reservoir

Fan delta reservoirs are widely distributed in most continental basins in China, and heterogeneity of parfaeies is serious. Based on the heterogeneity of fan delta reservoirs in the first and second member of Kongdian Formation in the Weibei Basin, Tanlu Fault Zone, sedimentary facies and reservoir property models were established by deterministic modeling and stochastic modeling. According to the variogram and stochastic simulation, the distribution of micro-facies was described by the sequential indicator simulation. The fractional geometry model of porosity and permeability was developed based on fractional Kriging interpolation principles. Comparing all the simulations suggests that the Kriging Model could preferably reflect the macroscopic changes of reservoir physical properties and sequential indicator simulation reproduces the heterogeneity in reservoirs. The fractional Kriging Model could reflect macroscopic physical properties and heterogeneity.