油砂储层非均质性的研究及对油气运移通道的预测——以松辽盆地西部斜坡为例  

Oil sand reservoir heterogeneity and prediction of hydrocarbon migration channels——a case study on west slope of Songliao Basin

作　　者：罗洪浩[1] 单玄龙[1] 管宏图 孙哲[1] 

机构地区：[1]吉林大学地球科学学院,长春130061 [2]中化地质矿山总局吉林地质勘查院,长春130022

出　　处：《世界地质》2012年第4期761-771,共11页World Geology

基　　金：国家专项(第二批);全国油气资源战略选区调查与评价(2009GYXQ14);东北亚生物演化与环境教育部重点实验室项目;吉林大学"211"工程三期建设项目;教育部基本科研业务经费项目(吉林大学创新团队发展计划)联合资助

摘　　要：以松辽盆地西部斜坡上白垩统油砂矿藏为例的研究表明,研究区主要发育三角洲前缘储集砂体,油砂储层存在严重的非均质性。与常规油气储层相比,层内非均质性要比平面和层间非均质性强,并且其控制因素也存在差异。在此基础上,以储层非均质性参数对油气运移通道进行预测,认为在断层不发育的构造简单斜坡油气运移的主要通道为水下分流河道下部和河口坝中的粗粒砂体,而远砂坝和席状砂砂体由于泥岩隔层、夹层、物性差和砂体层薄的原因不具备砂体连通或油气运移的条件。Taking oil sand reservoir in Upper Cretaceous of the western slope in Songliao Basin as an example,we found that the sand bodies of delta front are developed and the heterogeneity of oil sand reservoirs are serious in the study area.By comparison with conventional oil-gas reservoir,the in-layer heterogeneity is stronger than plane and interlayer heterogeneity even the controlling factors of oil sands reservoir heterogeneity are different.The prediction of hydrocarbon migration channels is based on the parameters of reservoir heterogeneity.The study results demonstrate that the lower part of underwater distributing channels and the coarse grain of mouth bars are the main migration channels on the background of simple slope structure without fault.The sand bodies of distal bars and sheet sands do not have the connectivity or hydrocarbon migration conditions because of mudstone barriers,interbeds,poor physics property and thin sandstone.

关 键 词：油砂矿藏 沉积微相 储层非均质性 影响因素 油气运移通道 松辽盆地 

分 类 号：P618.130.1[天文地球—矿床学]