利用多点地质统计学模拟河流相沉积微相

Simulation of fluvial sedimentary microfacies using multiple-point geostatistics

通过多点地质统计学方法,以苏里格气田苏49-01区块盒8段—山1段为实例,综合地质特征分析,结合野外露头建立的训练图像集,在井点信息和沉积模式的双重约束下,模拟了多河道、低弯度曲流河与缓坡型辫状河复合叠置的河流相体系的沉积微相,并与基于目标体、基于象元等传统建模方法的模拟结果进行对比分析。结果表明,多点地质统计学模拟能够有效地克服传统地质统计学模拟的不足,再现河流相复杂的空间结构和几何形态。

The He8-Shan1 formation of Block Su49-01 in Sulige gas field was taken as an example and the sedimentary microfacies of fluvial systems superimposed by multi channels,small sinuosity meandering rivers and gentle slope braided rivers were simulated under the dual constraints of well point information and sedimentary model of deposition using multiple-point geostatistics in combination with geologic feature analysis and the training image set of field outcrops.Comparisons were made with the simulation results from the conventional target based and pixel based modeling method.The results demonstrate that the multiple point geostatistical simulation could effectively overcome the shortcomings of the conventional geostatistical simulation and reproduce the complex spatial structure and configuration of fluvial facies.