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序贯指示模拟法夹层模型建立 被引量:3
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作者 潘少伟 罗海宁 郭智 《西南石油大学学报(自然科学版)》 CAS CSCD 北大核心 2014年第5期59-66,共8页
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... 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。 展开更多
关键词 沙二段 夹层 建模 变程 序贯指示模拟法
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Applying COSISIM model to study the permeability of porous media
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作者 LIU Zhen MU Chao-min 《Journal of Coal Science & Engineering(China)》 2011年第2期128-132,共5页
Accuracy of simulated permeability can be improved using soft data during the process of simulation. Integrating soft data with hard data, a method based on COSISIM (sequential indicator cosimulation) was proposed t... Accuracy of simulated permeability can be improved using soft data during the process of simulation. Integrating soft data with hard data, a method based on COSISIM (sequential indicator cosimulation) was proposed to reconstruct permeability. The algorithm COSISIM extends the SISIM (sequential indicator simulation) algorithm to handle secondary data. At the difference of SISIM, data must already be an indicator-coded prior to using COSISIM. The soft data were integrated with hard data using the Markov-Bayes algorithm and must be coded into indicators before they are used. This method was tested on a regional simulation of permeability. The simulated results and the original distribution of permeability were compared. The experimental results demonstrate that this method is practical. 展开更多
关键词 PERMEABILITY soft data COSISIM SIMULATION hard data
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