序贯指示模拟法夹层模型建立  

Interlayer Modeling with Sequential Indicator Simulation Method

作　　者：潘少伟[1] 罗海宁[2] 郭智[3] 

机构地区：[1]西安石油大学计算机学院,陕西西安710065 [2]中国石油塔里木油田分公司勘探开发研究院,新疆库尔勒841000 [3]中国石油勘探开发研究院,北京海淀100083

出　　处：《西南石油大学学报（自然科学版）》2014年第5期59-66,共8页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：陕西省自然科学基金(2012JQ8040);陕西省教育厅科学研究计划项目(2013JK1134)

摘　　要：油田开发后期,夹层对剩余油分布有着重要影响。为搞清沙二段1—3砂层组夹层空间分布状况,在对其岩性、物性和电性特征精细描述的基础上,利用随机模拟中的序贯指示模拟方法,选择不同变差函数长、短变程建立夹层的三维空间分布模型,之后在同一长、短变程下采用不同随机种子建立夹层的三维空间分布模型。最后对所有模型进行检验,优选出各项指标预测值与实际值最为接近的夹层模型。沙二段1—3砂层组夹层最终建模结果表明:在相同随机种子下,过大或过小的长、短变程都会导致模拟结果的不连续,降低模拟结果的精确度;在井网较密的情况下,在同一长、短变程下,不同随机种子对模拟结果的影响极其微小。沙二段1—3砂层组夹层模型的建立对其空间分布状况落实具有重要的现实意义。The interlayer has an important influence on the distribution of remaining oil in the late period of oilfield development. In order to find out the the distribution of remaining oil of the 1st-3rd sandstone in Es2,the 3D distribution modeling of interlayer is established with the different variation function range based on the fine description of the lithology,physical property and electrical property. Then,different random seeds are used to develop the 3D distribution modeling with the same variation function range. At last,all the models of interlayer are tested to find out the best model of which the predicted values of all indexes are the closest to the actual values. The results of interlayer modeling show that too big or too small variation function range will cause the uncontinuity of modeling with the same random seed and that the impact on modeling with different random seeds is very small in the case of denser well network. The interlayer modeling of the 1^st–3^rd sandstone in Es2 has an important significance on the confirmation of its 3D distribution.

关 键 词：沙二段 夹层 建模 变程 序贯指示模拟法 

分 类 号：TE122[石油与天然气工程—油气勘探]