大庆致密油藏渗吸采油剂筛选及性能评价  

SCREENING AND PERFORMANCE EVALUATION OF THE IMBIBITION OIL-PRODUCING AGENT FOR DAQING TIGHT OIL RESERVOIRS

作　　者：王佳[1] 

机构地区：[1]大庆油田有限责任公司采油工程研究院,黑龙江大庆163453

出　　处：《大庆石油地质与开发》2017年第3期156-162,共7页Petroleum Geology & Oilfield Development in Daqing

基　　金：大庆油田重点科技攻关课题"缝网压裂井增能吞吐技术研究"(DQYT-1204003-2015-JS-821)经费资助

摘　　要：大庆外围地区致密油储量丰富,但由于缺乏有效开发技术手段,储量动用程度较低。借鉴现有渗吸采油和稠油降黏增能技术原理,提出了致密油藏"渗吸液+增能剂"联合注入新技术。以高分子化学、物理化学和油藏工程等理论为指导,以化学分析和仪器检测等技术为手段,以大庆外围扶余油藏流体性质为实验平台,开展了渗吸采油剂和增能剂筛选与性能评价实验研究。结果表明:从界面张力和抗吸附能力等技术指标考虑,在3种参与评价的表面活性剂中,DCY性能较优;在相同含量(质量分数为1.0%)条件下,增能剂在催化剂A、B、C和D作用下生气量分别为24.2%、10.5%、58.3%和21.5%,但从整体费用和注入工艺角度考虑,建议使用催化剂A作为增能剂的催化剂;随反应时间增加,增能剂生气量增加,但反应时间超过2 d后生气量基本保持不变;随反应温度升高,生气量增加,但反应温度超过70℃后生气量增幅明显减小;与渗吸液和增能剂相比较,"渗吸液+增能剂"组合渗吸采油效果较好,二者组合可以产生协同效应,提高渗吸采油效果。The tight oil reserves in Daqing peripheral area are rich, but the developed degree of the reserves is rather lower due to the lack of the effective technical means of the development. With the help of the current oil-pro- ducing technical principles of the imbibition and viscosity-reduction ＆ energy enhancement of the heavy oil, the new technique of the combined injection between the imbibition solution and energizer was developed for the tight oil reservoirs. Theoretically guided by the high-molecule chemistry, physico-ehemistry, petroleum engineering and so on, and moreover by means of the chemical analysis, instrument test and other technical methods, taking the fluid properties of Fuyu oil reservoirs in Daqing peripheral area as the testing platform, the experimental researches on the selection and performance evaluation of the oil-producing imbibing agents and energizer were carried out. The achievements show that considering the interfacial tension and anti-adsorption capacity and other technical indicators, for 3 kinds of the surfactant to participate in the evaluation, DCY has much better performances; under the same content （ 1% ） , the generated gas contents of the energizer are 24. 2%, 10. 5%, 58.3% and 21.5% respec-tively under the actions of Catalyst A, B, C and D. But considering the total cost and injection technology, Catalyst A is suggested to be used as the catalyst of the energizer; with the rise of the reaction time, the generated gas quan- tity is increased as well, but after the reaction time is more than 2 days, the amount rema/ns unchanged ; with the rise of the reaction temperature, the quantity is enhanced, while after the reaction temperature is greater than 70~C, the incremental degree is obviously reduced; Comparing with the imbibition solution and energizing agent, the combination of the imbibition solution and energizer has much better effects in the imbibition oil recovery i. e. the combination has produced the synergistic effects and improved the efficiency of the imbibitio

关 键 词：大庆油田 致密油藏 渗吸剂 增能剂 界面张力 生气量 实验研究 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]