2023年12月11日发(作者:2016款奇瑞风云2多少钱)

第31卷第4期 海 洋 石 油 0FFSHORE OIL Vo1_31 No.4 Dee.20lll 2011年l2月 文章编号:1008—2336(2011)04—0068—05 低饱和度油藏原始饱和度计算及含水上升规律 戴胜群 ,徐勋诚 ,洪秀娥 ,尹太举 ,付波 ,。 (1.长江大学地球科学学院3RG研究组,湖北荆州434023; 2.长江大学油气资源与勘探技术教育部重点实验室,湖北荆州434023) 摘要:受低幅度构造、地层倾角小、储层渗透率低、油源供给不足等因素影响,油层中存在自由水,若整个开发层系的油层大 面积内均为油水同层,则称为低含油饱和度油藏。低含油饱和度油藏油井投产初期就具有一定含水率。由于室内岩心试验 获得的油水相对渗透率曲线是在饱和油情况下进行,因此,油田实际含水与采出程度和利用室内试验曲线计算出的理论含水 与采出程度曲线不能较好吻合,当油藏原始含水饱和度较高时这种误差会很大,导致含水与采出程度理论曲线无法正确预测 油藏含水上升规律。根据试验获得的相渗曲线和实际生产数据,采用试验数据与生产实际相互印讧的方法,修正油藏含水上 升规律,计算油藏原始含水饱和度,解决了油藏原始含油饱和度计算以及具有原始含水饱和度油藏含水上升规律预测问题, 对正确认识油藏和开发指标预测具有重要意义。 关键词:低幅度构造;低饱和度油藏;原始含油饱和度计算;含水上升规律 中图分类号:TE349 文献标识码:A DOI:10.3969/j.issn.1008—2336.2011.04.068 The initial oil saturation calculation and water cut rising rules of low oil saturation reservoir DAI Shengqun ,XU Xuncheng ,HONG Xiu’e ,YIN Taiju ,FU Bo , (1.Remaining Resource Research Group,College of Geosciences,Yang ̄e University,Jingzhou Hubei 434023,China: 2.MOE Key Laboratory ofOil&Gas Resources and Exploration Technique,Yangtze University,Jingzhou Hubei 434023,China) Abstract:Under the influence of low amplitude structures,low formation dip,low reservoir permeability,insuficifent supply of 0il sources and other factors,there is free water in the reservoir.If large areas of the reservoir in the entire layer series of development are oil—water layers.it is a low oil saturation reservoir.Reservoir wells have certain water cut during the initial production in low 0il satura— tion reservoir.Oil—water relative permeability curves are obtained from indoor core tests in the case of the saturated oil,therefore,the actual water cut and degree of reserve recovery which was calculated through indoor tests can’t match wel1.And the error will be vmT large with higher initial water saturation,which makes the theoretic curve of water cut and degree of reserve recovery unable to predict water cut rising rules correctly.Taking the method of confirming experimental data and actual production by each other,based on the relative permeability curves obtained by experiments and data from actual production,this paper revises the laws of water cut rising, calculates the initial water saturation.and Solves the problems of the calculation of the initial oil saturation and the prediction of water cut rising rules in a reservoir with initial water saturation,which is of great importance to a correct understanding of reservoir and the prediction of development index. Key words:low amplitude structure;low saturation reservoirs;calculate the initial oil saturation;water cut rising rules 常规油藏在原始饱和度下束缚水一般低于 40%,而且束缚水在油田开发过程中一般不会发生 动水,这类油气田在开发过程中不存在无水期采油, 具有明显不同于常规油藏的渗流特征。 低含油饱和度油藏形成的原因一般归结为三个 方面:一是油源供给不足;二是储集层岩石颗粒细 流动,而低含油饱和度油藏的共存水饱和度高于常 规束缚水饱和度,含油饱和度明显偏低,存在明显可 基金项目:国家重大专项课题“剩余油分布综合预测与精细注采结构调整技术”(编号:2011ZX05010—002)部分成果。 收稿日期:2011—05—1;改回日期:2011一O6—29 第一作者简介:戴胜群,男,1963年生,回族,1987年7月毕业于江汉石油学院石油地质专业,博士,剐教授,主要从事油气田地质与开发研究和 教学工作。E—mail:daisheagqun@126.com。 

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饱和度,油藏,含水,原始,计算,含油,开发