高压复合热泡沫在多孔介质中的渗流能力实验  

SEEPAGE CAPACITY EXPERIMENT OF HOT COMPOSITE FOAM WITH HIGH-PRESSURE IN POROUS MEDIA

作　　者：袁新强[1,2] 李洁[3] 王克亮[4] 杜姗[4] 陈金凤[2] 

机构地区：[1]中国科学院渗流流体力学研究所,河北廊坊065007 [2]大庆油田有限责任公司第二采油厂,黑龙江大庆163414 [3]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712 [4]大庆石油学院提高油气采收率教育部重点实验室,黑龙江大庆163318

出　　处：《大庆石油地质与开发》2009年第4期102-106,共5页Petroleum Geology & Oilfield Development in Daqing

摘　　要：复合热泡沫驱油技术是将泡沫驱油技术和热力采油技术集成在一起，充分发挥二者优势的三次采油技术。研究所涉及的复合热泡沫体系，选择HY-3表活剂作为发泡剂，热烟道气（由85％的N2和15％的CO2组成）作为发泡气体。该体系不但具有泡沫驱油和热力采油的优点，同时又具有一定的CO2驱油和N2驱油的的作用。泡沫在地层高压条件下的稳定性和封堵能力，是泡沫体系能否取得理想驱油效果的关键。研究首次利用高压泡沫装置进行复合热泡沫高压渗流能力实验，研究了高压条件下复合热泡沫的稳定性及其在多孔介质中渗流能力的影响因素。研究结果表明：在地层高压条件下，HY-3表活剂和烟道气可以在多孔介质中形成具有较强封堵能力的稳定泡沫，且在非均质岩心中的封堵效果明显好于在均质岩心中的封堵效果；岩心渗透率越高，阻力系数越大，泡沫封堵效果越好；注入速度越高，形成泡沫强度越大，泡沫封堵能力越好；气液比越大，泡沫渗流阻力越大，气液比达到1：1后，继续增大气液比对渗流阻力影响不大，为防止气窜，建议现场实施过程中气液比采用1：1。The oil displacement technique by the hot composite foam is the tertiary technique to integrate the one by the foam with the thermal recovery technique and sufficiently display both advantages. For the hot composite foam system studied, the HY-3 surfaetant is selected as the foaming agent, and the hot flue gas { composed of 85 % of N2 and 15% of CO2 ） as the foaming body. The system has not only the advantages of the oil displacement by the foam and the thermal recovery, but also a certain action of the oil displacement by CO2 and N2. The stability and plugging capability of the foam under the high-pressure formation conditions are the key that the foam system can or can not obtain the ideal oil displacement effect. The high-pressure seepage capacity experiment of the hot composite foam is conducted with the high-pressure foam device for the first time. This paper studies the influence factors of hot composite foam stability and its seepage capacity in porous media under the high-pressure. Study results indicate that under the high-pressure, the HY-3 surfactant and flue gas can form the stable foam with stronger plugging capacity in the porous media, and the plugging effect in the heterogeneous cores are obviously better than that in the homogeneous ones; the higher the core permeability is, the larger the resistance coefficient, the better the plugging effect of the foam; the higher the injection speed is, the larger the formed foam strength , the better the plugging capacity of the foam; the larger the gas/liquid ratio is, the larger the seepage resistance of the foam. After the gas/ liquid ratio reaches 1 ： 1, there are not serious influences of continuous increase of the gas/liquid ratio on the seepage resistance. In order to prevent the gas channeling, the gas/liquid ratio of 1： 1 is suggested during field implementation.

关 键 词：复合热泡沫 高压 渗流能力 多孔介质 回压 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]