东营凹陷低渗透油藏分布规律及储层改造效果  

Distribution and transforming effects of low permeability reservoirs in Dongying Depression

作　　者：苏国英[1] 

机构地区：[1]中国石油化工股份有限公司胜利油田分公司地质科学研究院,山东东营257015

出　　处：《海洋石油》2008年第4期21-25,共5页Offshore Oil

摘　　要：东营凹陷2001年之前探明的低渗透油藏主要分布在洼陷带、中央背斜带及北部陡坡带,以沙三段深水浊积扇及沙四段滨浅湖相砂岩滩坝、扇三角洲前缘等沉积体系为主。油藏类型主要是岩性油藏,其次为构造—岩性复合型油藏。低渗透油藏以中深层、常压-超高压、低产、中产为特征,多为特小型、小型油藏,储量丰度为低丰度~特低丰度。低渗透油藏的探井试油过程中,经历了从酸化逐步到压裂的技术发展过程。统计探井的试油效果表明,沙四段碳酸盐含量较高的砂岩低渗透油藏,酸化效果较好;黏土含量较高的沙三段低渗透油藏,压裂效果较好。The low permeability reservoirs（LPR）proved before 2001 in Dongying Depression are distributed mainly in depression, central anticline, and northern steep slope. The main sedimentary systems of LPR are deep water turbidite fan in Es3, shore sand beach bar and fan delta front in Es4. The main types of LPR are lithologic reservoirs, followed by structural lithologic reservoirs. The features of LPR are middledeep burial depth, atmospheric-extra high pressure, low-middle yielding, mini-small scale, low abundance, and etc. The oil testing of LPR in exploration wells experiences a process from acidification to fracturing. Good effects have been achieved from acidification in sand LPR with high carbonate content in Es4, while good effects have been achieved form fracturing in sand LPR with high clay content in Es3.

关 键 词：东营凹陷 低渗透油藏 分布规律 酸化 压裂 储层改造 

分 类 号：TE122.3[石油与天然气工程—油气勘探] TE348