低成本O/W型乳液与岩心孔吼配伍性及其驱油效率  

Oil Displacement Efficiency and Pore Size Matching of an Economic O/W Emulsion Flooding

作　　者：宁健 魏兵[1] 高炎[2] 王牧明 蒲万芬[1] 王崇阳 王生奎 NING Jian;WEI Bing;GAO Yah;WANG Muming;PU Wanfen;WANG Chongyang;WANG Shengkui(State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu,Sichuan 610500,P R of China;Baikouquan Oil Production Plant,Xinjiang Oilfield Branch,PetroChina,Karamay,Xinjiang 834000,P R of China;Zitong Gas Production Region of Northwest Sichuan Gas Field,Southwest Oil and Gas Field Company PetroeHina,Mianyang,Sichuan 622150,P R of China;Sichuan Bobang Energy and Technology Co,Ltd.Chengdu,Sichuan 610500,P R of China)

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室,四川成都610500 [2]中国石油新疆油田分公司百口泉采油厂,新疆克拉玛依834000 [3]中国石油西南油气田分公司川西北气矿梓潼采气作业区,四川绵阳622150 [4]四川伯邦能源科技有限公司,四川成都610500

出　　处：《油田化学》2018年第2期328-332,共5页Oilfield Chemistry

基　　金：国家科技重大专项"塔里木盆地碳酸盐岩油气田提高采收率关键技术示范工程"(项目编号2016ZX05053)

摘　　要：本文利用廉价碱和少量高酸值稠油,建立了一种低成本O/W型乳液驱方法,并系统研究了乳液的物理性质以及在多孔介质中的流动行为和驱油效率。研究结果表明,在油水比0.5∶9.5条件下,通过调整转速(1500~2600 r/min)和搅拌时间(0.5数2 h)制备的一种不稳定型和三种稳定型的O/W型乳液,在岩心中流动时,由于贾敏效应,稳定型乳液的注入压力明显升高,而不稳定型乳液发生油水分离,注入压力变化不明显。从乳液驱效果上看,转速2000 r/min、搅拌时间1.5 h下形成的稳定乳液可以有效提高原油采收率达17%。乳液液滴和岩石孔喉的匹配系数f小于1时,乳液的驱油效率不高;f大于1时,乳液液滴能对岩心孔喉有效封堵,提高采收率明显。但是并非f越大提高采收率越高。An economic chemical method was proposed based on the reaction between alkali and high acid crude oil, and the physical properties of the formed emulsion, flow behaviors and oil displacement efficiency were comprehensively investigated. It was shown that under the condition of oil to water ratio of 0.5 ： 9.5, an unstable and three stable O/W emulsions were prepared by adjusting the rotating speed （ 1500---2600 r/min） and stirring time （0.5--2 h）. Due to the Jiamin effect, the injection pressure of the stable emulsion significantly increased when flowing in the core, while the unstable emulsion occurred oil-water separation, and the injection pressure did not change significantly. The stable emulsion formed at a rotational speed of 2000 r/min and a stirring time of 1.5 h could effectively increase oil recovery by up to 17%. When the matching factorfbetween the emulsion droplets and the rock pore throats was less than 1, the oil displacement efficiency of the emulsion was not high; whenfwas greater than 1, the emulsion droplets can effectively block the pore throat and increase the recovery efficiency. However, the higherfwas not always better.

关 键 词：低成本化学驱 O/W乳液 流动行为 驱油效率 匹配系数 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]