大庆油区杏六区中部油藏三次加密合理布井方式  

Study of reasonable well planning for third infilling in Xing6 Central, Daqing oilfield

作　　者：胡伟[1] 闫超[2] 陈正涛[2] 黄伟[1] 康元勇[3] 

机构地区：[1]中国石油大学(北京)石油工程教育部重点实验室,北京102249 [2]中国石油大港油田分公司第一采油厂,天津300280 [3]中国石化胜利油田分公司地质科学研究院,山东东营257015

出　　处：《油气地质与采收率》2013年第6期73-75,115-116,共3页Petroleum Geology and Recovery Efficiency

基　　金：国家科技重大专项"高含水油田提高采收率新技术--剩余油分布综合预测与精细注采结构调整技术"(2011ZX05010-002)

摘　　要：大庆油区杏六区油藏经过43 a注水开发,现已进入高含水开发后期,剩余油分布零散,低渗透薄差储层动用程度较低。在储层精细地质描述的基础上,应用剩余油综合描述技术,分析了杏六区中部油藏二次加密后剩余油分布特点、油层水洗状况和可调砂岩厚度。针对有效厚度小于0.5 m的表内薄层和表外储层,开展了三次加密调整合理布井方式研究。主要采用三次加密调整与原井网、注采系统调整及后期三次采油相结合的优化布井方式,通过实施调整井网类型、注采井距、注采系统等措施,达到完善注采系统、充分挖潜剩余油的目的。在杏六区中部油藏实施三次加密调整措施后,采收率同比提高2.72%,表外储层水驱控制程度提高9.69%,表内薄层、一类表外储层和二类表外储层动用砂岩厚度比例分别提高了4.32%,6.13%和14.78%,并形成了配套的三次加密调整技术。After forty-three years water flooding development, the reservoir in Xing6 area is in high water cut stage of development, the scatter distribution of remaining oil and the poor development on thin and poor oil layers are present problems. On the basis of elaborate reservoir geological description, and using the skills of comprehensive description of the remaining oil, we analyze the features of remaining oil, as well as all types of layers' washing condition and adjustable sandstone thickness after second infilling in Xing6 area. In response to the sand layers with effective thickness under 0.5 m, the third infilling stage is implemented. Under the'three combinations'policy of optimizing well distribution, and through the adjustment of the well pattern, injection producer distance, well density, water flooding system, etc., the perfect injection and production systems are achieved to fully produce the remaining oil. The good results have been achieved in Xing6 area, and formed the matching infilling techniques.

关 键 词：薄差储层 三次加密调整 布井方式 表外储层 杏六区中部油藏 

分 类 号：TE34[石油与天然气工程—油气田开发工程]