适合渤海绥中361油田二元复合驱体系性能研究  

Performance of Surfactant/Polymer Flooding System Suitable for Suizhong 361 Oilfield

作　　者：张新民[1,2] 郭拥军[1,2] 冯茹森[1] 柳建新[1] 张健[3,4] 吕鑫[3,4] 曹旭杰[5] 

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]四川光亚科技股份有限公司,四川南充637005 [3]海洋石油高效开发国家重点实验室,北京100027 [4]中海油研究总院,北京100027 [5]中国石油四川石化有限责任公司,四川成都611930

出　　处：《油田化学》2012年第3期322-325,361,共5页Oilfield Chemistry

基　　金：国家科技重大专项项目海上稠油油田高效开发新技术(项目编号2008ZX05024-002)

摘　　要：本文在渤海绥中361海上油藏条件下,测定了由磺酸盐型双子表面活性剂为主的表面活性剂(辛基酚基聚氧乙烯醚TX100与磺酸盐型双子表面活性剂按质量比1∶4)与疏水缔合聚合物组成的SP二元复合驱体系的黏度及其与渤海绥中361脱气原油间的界面张力,并考察该体系的抗温性、耐盐性、吸附性及老化稳定性等,测定了该驱油体系在不同渗透率岩心中的阻力系数和残余阻力系数,在三层非均质岩心上进行了表面活性剂浓度不同的6个室内驱油实验。研究结果表明,配方为3000 mg/L表面活性剂+1750 mg/L聚合物的SP二元复合驱油体系具有良好的抗温、抗盐、抗剪切性及老化稳定性;该二元复合驱油体系黏度达40 mPa.s以上,可使油水界面张力降至10-3mN/m数量级,同时该体系在不同渗透率岩心中均能建立较高的阻力系数与残余阻力系数;室内驱油实验表明,在三层非均质岩心中,聚合物浓度为1750 mg/L,二元体系与原油界面张力由100mN/m(表面活性剂0 mg/L)降至10-2mN/m(表面活性剂750 mg/L)数量级时提高采收幅度很大;当界面张力由10-2mN/m(表面活性剂750 mg/L)降至10-3mN/m(表面活性剂1000 3000 mg/L),复合驱采收率增加幅度很小;总体上,该SP二元复合驱油体系具有良好的提高采收率能力,可提高采收率35%以上。According to the reservoir condition of Suizhong 36-1 oilfield（ named SZ36-1 ）, the viscosity of surfactant/polymer （SP） binary displacement system, composed of sulphonate Gemini surfactant system（ mass ratio of octyl phenol polyoxyethylene ether TX100 to sulphonate Gemini surfactant was 1：4） and hydrophobic associating polymer, and interfacial tension between SP system and SZ36-1 degassed oil were determined, and the temperature resistance, salts tolerance, adsorption property, aging stability were studied. The resistance factor and residual resistance factor were determined with 6 laboratory displacement experiments in the three layer heterogeneous cores in different surfactant concentrations. The results showed that the SP binary system of 3000 mg/L surfactant ＋ 1750 mg/L polymer had good temperature resistance, salts tolerance, shearing resistance and aging stabihty; the viscosity of SP was up to 40 mPa·s and the interfacial tension could be low to 10^-3 mN/m order of magnitude, and the higher resistance factor and residual resistance factor were obtained in different permeability. At a set polymer concentration of 1750 mg/L, the results of laboratory displacement experiments carried out in the three layer heterogeneous cores showed that the oil recovery increased greatly when interfacial tension changed from 10^0 mN/m（ surfactant concentration was 0 mg/L） to 10^-2 mN/m magnitude （surfactant concentration was 750 mg/L）, however, when the interfacial tension changed from 10^-2 mN/m（ surfactant concentration was 750mg/L） to 10^-3 mN/m magnitude （surfactant concentration was 1000 - 3000 mg/L）, the enhancement of oil recovery changed little. Overall, the SP binary displacement system had good ability to improve oil recovery, the enhancement of the oil recovery being of more than 35%.

关 键 词：磺酸盐型双子表面活性剂 表面活性剂/聚合物二元复合驱 疏水缔合聚合物 黏度 界面张力 提高采收率 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]