鲁克沁稠油提高采收率泡沫体系室内研究  

Laboratory Study on Foam System for Enhanced Oil Recovery of Lukeqin Heavy Oil

作　　者：魏勇 邓昌联 肖毓 李晶晶[2] 唐晓东[2] Wei Yong;Deng Changlian;Xiao Yu;Li Jingjing;Tang Xiaodong(Tuha Oilfield Exploration and Development Research Institute,Turpan Xinjiang 838202;College of Chemistry and Chemical Engineering,Southwest Petroleum University,Chengdu Sichuan 610500)

机构地区：[1]吐哈油田勘探开发研究院,新疆吐鲁番838202 [2]西南石油大学化学化工学院,四川成都610500

出　　处：《中外能源》2019年第8期54-59,共6页Sino-Global Energy

摘　　要：目前鲁克沁油田所用驱替泡沫体系的泡沫强度不高,地层吸附损耗较大,发泡后消泡速率快,这将导致泡沫在注入地下后不能有效扩大驱替波及面,消泡后气体快速指进发生气窜、地层能量损失等问题,对生产安全造成隐患。针对鲁克沁油田地层条件筛选复配了一种泡沫体系VEFS,该体系由甜菜碱类表面活性剂VES-1和多糖高分子稳泡剂FS-4组成,体系用量为0.5%(质量百分比)VES-1+0.2%(质量百分比)FS-4。实验表明,该体系在80℃、矿化度17.7×10^4mg/L和原油含量16%(质量百分比)条件下具有良好的泡沫性能,经第一轮4次动态吸附后泡沫性能降低49.70%,第二轮4次吸附后泡沫性能仅降低12.06%。在气液比为1∶1时泡沫体系阻力因子达131.1,说明泡沫体系能够起到调驱作用。通过稠油物模驱替实验发现,该体系在水驱见水后能够持续抑制含水率1.09PV,并在水驱突破后继续提高采收率17.69%。并且在含水率较低时提前注泡沫能够获得更好的控水和提高稠油采收率的效果。The foam of the displacement foam system applied in Lukeqin Oilfield has the characteristics of weak strength , much loss by formation adsorption and quick defoaming after foaming , which will result in no effect on enlarging sweep volume of the displacement effectively after injection , and gas channeling and formation energy loss because of quick gas fingering after defoaming.There will be the risk for safe production. A foam system VEFS was compounded after selection according to the formation conditions of Lukeqin Oil- field.The system is composed of betaine surfactant VES-1 and polysaccharide macromolecule foam stabilizing agent FS-4.The composition of the system is 0.5wt%VES-1+0.2wt%FS-4.Experiments show that the system has good foam performance under the condition of 80℃, the salinity of 17.7×10^4 mg/L and the content of crude oil of 16wt%.The foam performance decreases by 49.70% after dynamic adsorption for four times at the first round , and by 12.06% only after the dynamic adsorption for four times at the second round.When the gas-liquid ratio is 1∶1 , the resistance factor of the foam system reaches 131.1 , indicating that the foam system can play a role in profile control and oil displacement.Physical simulation experiment for displacement of the heavy oil shows that the system can effectively control 1.09PV of water cut after water flooding , and continue to improve recovery of 17.69% after water flooding breakthrough.In the case of low water cut , foam injection in advance can achieve better water cut control and enhance heavy oil recovery.

关 键 词：稠油 泡沫驱 表面活性剂 耐温抗盐 抗吸附 驱替效率 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]