姬塬地区长4＋5段油藏油水分布控制因素分析  

Analysis of governing factors of oil and water distribution in Chang4＋5 oil reservoirs of Jiyuan Area, Ordos Basin

作　　者：李成[1,2] 袁京素[3] 高俊梅[1,2] 张三[1,2] 马艳丽[1,2] 张振红[1,2] 汪伶俐[1,2] 

机构地区：[1]中国石油长庆油田分公司勘探开发研究院 [2]低渗透油气田勘探开发国家工程实验室 [3]中国石油长庆油田分公司第八采油厂

出　　处：《低渗透油气田》2016年第1期20-25,共6页

摘　　要：姬塬地区长4＋5段油藏局部出水，油水关系复杂。成藏控制因素分析表明，长7段广布式的烃源岩提供了丰富的资源基础，差异成岩作用控制下的三角洲前缘相对高孔高渗储层为油气聚集提供场所，大量发育的裂缝是油气运移的主要通道，三者整体控制长4＋5段油藏大面积、大规模发育，但在局部受烃源岩厚度和储层非均质性的影响，油气富集程度存在差异。创新提出的“长7段油源、裂缝及渗透性砂岩通道、非等动力垂向多点充注，物性控制非均匀成藏”模式，有效揭示了长4＋5段油藏大范围发育但差异性含油的地质成因.The Chang4＋5 oil reservoirs in Jiyuan area produce locally water, with complicated oil-water relationship. The analysis of governing factors of SRCA showed that, Chang7 widespread-type source rocks provide a rich resource hase; relatively high porosity and high permeabilily reserw）irs in the delta front under the control of discrepant diagenesis provide space for oil accunmlation; the massively developed fissures are the main channel of oil and gas migration. These three overall controls the large area and large-scale development of Chang4＋5 reservoirs. But it is influenced locally by the thiekness of the source rock and the reservoir heterogeneity, resulting in the different extents of oil enrichment. The ＂Chang7 oil source, fractures and permeable sandstone channel, and non- isodynamic and vertical multipoint charging/filling, and property-controlled in homogeneous SRCA＂ model reveals the geological genesis of the large area development but differential oil-bearingness of the Chang4＋5 reservoirs.

关 键 词：成藏控制因素 烃源岩 储层物性 充注动力 石油富集程度 

分 类 号：P618.13[天文地球—矿床学]