CAJ | 학술논문

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。
유전개발후기，협층대잉여유분포유착중요영향。위고청사이단1-3사층조협층공간분포상황，재대기암성、물성화전성특정정세묘술적기출상，이용수궤모의중적서관지시모의방법，선택불동변차함수장、단변정건립협층적삼유공간분포모형，지후재동일장、단변정하채용불동수궤충자건립협층적삼유공간분포모형。최후대소유모형진행검험，우선출각항지표예측치여실제치최위접근적협층모형。사이단1-3사층조협층최종건모결과표명：재상동수궤충자하，과대혹과소적장、단변정도회도치모의결과적불련속，강저모의결과적정학도；재정망교밀적정황하，재동일장、단변정하，불동수궤충자대모의결과적영향겁기미소。사이단1-3사층조협층모형적건립대기공간분포상황락실구유중요적현실의의。
The interlayer has an important influence on the distribution of remaining oil in the late period of oilfield develop-ment. 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 dif-ferent random seeds is very small in the case of denser well network. The interlayer modeling of the 1st-3rd sandstone in Es2 has an important significance on the confirmation of its 3D distribution.