针对三元复合驱在注入井近井地带的损耗问题,提出了将高压水射流钻超短半径径向水平井与三元复合驱相结合的靶向输送提高采收率技术,利用水平井作为“靶向通道”,将三元复合体系直接输送至剩余油富集区,避免了三元复合体系在注入井近井地带的损耗。平板均质模型室内实验与数值模拟参数优化研究证实,该技术可显著扩大波及效率,改善驱油效果,大幅度提高原油采收率;靶向输送技术最佳驱替参数组合为：直角靶向输送,通道长度约为井距的15%,三元复合体系段塞注入量为0.4倍孔隙体积;三元复合驱靶向输送技术在合理参数下,相对于水驱可提高采收率48.87%,相对于常规三元复合驱可提高采收率22.04%。靶向输送技术解决了三元复合驱近井地带化学剂的高损耗问题,同时弥补了三元复合驱成本高、应用受限的缺陷,具有广阔的应用前景。图8表2参16
Aiming at the problem of the loss of the ASP flooding near the injection wells, this paper gives a new idea to enhance oil recovery called “Technique of Targeted Delivery”, which combines the radial horizontal well with ultra-short radius drilled by high pressure water jet with the ASP flooding, the horizontal wells work as the “Target channel” transport the ternary composite system to the remaining oil enrichment area directly, to avoid the loss of the ternary composite system near the injection wells. The plate homogeneous experiment and numerical simulation show that the technique can significantly improve the sweep efficiency and the effect of the oil displacement, and greatly improve the oil recovery rate. The optimal flooding parameters of the target transport technique are: the right angle target, the length of the channel is about 15% of the well distance and the injection volume of the ternary composite system is 0.4 PV. Under such conditions, this technique can enhance recovery by 48.87% and 22.04% respectively, compared with the water flooding and conventional ASP flooding. The target transport technique solves the problem of high loss of chemical agent in near-wellbore area during the ASP flooding, and compensates for the high cost of ASP flooding and the limitation of application, and has a broad application prospect.
[1] 王德民, 王刚, 夏惠芬, 等. 天然岩芯化学驱采收率机理的一些认识[J]. 西南石油大学学报(自然科学版), 2011, 33(2): 1-11.
WANG Demin, WANG Gang, XIA Huifen, et al.Chemical flooding recovery mechanism of natural cores[J]. Journal of Southwest Petroleum University (Science & Technology Edition), 2011, 33(2): 1-11.
[2] 侯吉瑞, 刘中春, 岳湘安. 复合体系超低界面张力和碱在驱油过程中的实际作用[J]. 大庆石油地质与开发, 2006, 25(6): 82-86.
HOU Jirui, LIU Zhongchun, YUE Xiang’an.Effect of multi-system ultra-low interfacial tension and alkali in oil displacement process[J]. Petroleum Geology & Oilfield Development in Daqing, 2006, 25(6): 82-86.
[3] 刘卫东, 罗莉涛, 廖广志, 等. 聚合物-表面活性剂二元驱提高采收率机理实验[J]. 石油勘探与开发, 2017, 44(4): 600-607.
LIU Weidong, LUO Litao, LIAO Guangzhi, et al.Experimental study on the mechanism of enhancing oil recovery by polymer-surfactant binary flooding[J]. Petroleum Exploration and Development, 2017, 44(4): 600-607.
[4] 王家禄, 沈平平, 陈永忠, 等. 三元复合驱提高石油采收率渗流机理的实验研究[J]. 中国科学: 技术科学, 2005, 35(9): 996-1008.
WANG Jialu, SHEN Pingping, CHEN Yongzhong, et al.Experimental investigations on the fluid flow mechanism in porous media of enhanced oil recovery by alkli/surfactant/polymer flooding[J]. SCIENCE CHINA Technological Sciences, 2005, 48(4): 454-467.
[5] 侯吉瑞, 张淑芬, 杨锦宗, 等. 复合驱过程中化学剂损失与超低界面张力有效作用距离[J]. 大连理工大学学报, 2005, 45(4): 496-500.
HOU Jirui, ZHANG Shufen, YANG Jinzong, et al.Chemical agent loss and effective distance of ultra-low IFT in ASP flooding[J]. Journal of Dalian University of Technology, 2005, 45(4): 496-500.
[6] 王宝瑜, 曹绪龙. 三元复合驱油体系中化学剂在孤东油砂上的吸附损耗[J]. 油田化学, 1994, 11(4): 336-339.
WANG Baoyu, CAO Xulong.The losses of alkaline, surfactant and polymer in tricomponent chemical flooding solution measured as adsorption on reservoir sand of Gudong oil field[J]. Oilfield Chemistry, 1994, 11(4): 336-339.
[7] 刘刚, 侯吉瑞, 李秋言, 等. 二类油层中三元复合驱体系的损耗及有效作用距离[J]. 中国石油大学学报(自然科学版), 2015, 39(6): 171-177.
LIU Gang, HOU Jirui, LI Qiuyan, et al.Chemicals loss and effective distance of ASP flooding in second-class oil layers[J]. Journal of China University of Petroleum (Edition of Natural Science), 2015, 39(6): 171-177.
[8] 梁壮, 葛勇, 李洁, 等. 水力喷射径向水平井技术在煤层气开发中的应用[J]. 辽宁工程技术大学学报(自然科学版), 2011, 30(3): 349-352.
LIANG Zhuang, GE Yong, LI Jie, et al.Application of waterpower injector radial horizontal well technology in CBM exploration[J]. Journal of Liaoning Technical University (Natural Science), 2011, 30(3): 349-352.
[9] RAGAB A M S, KAMEL A M. Radial drilling technique for improving well productivity in Petrobel-Egypt[R]. SPE 164773, 2013.
[10] 余海棠, 杜素珍, 俞忠宝, 等. 水力喷射径向钻孔技术的现场试验[J]. 复杂油气藏, 2013, 6(4): 62-64.
YU Haitang, DU Suzhen, YU Zhongbao, et al.Field test of hydraulic jetting radial drilling technique[J]. Complex Hydrocarbon Reservoirs, 2013, 6(4): 62-64.
[11] 曹有好, 吴迪, 孟宪瑞. 水力喷射微小井眼径向水平井产能影响规律研究[J]. 内江科技, 2016, 37(7): 63-64.
CAO Youhao, WU Di, MENG Xianrui.Influence of hydraulic jet on productivity of micro radial horizontal well[J]. Nei Jiang Ke Ji, 2016, 37(7): 63-64.
[12] 赵金洲, 陈曦宇, 李勇明, 等. 水平井分段多簇压裂模拟分析及射孔优化[J]. 石油勘探与开发, 2017, 44(1): 117-124.
ZHAO Jinzhou, CHEN Xiyu, LI Yongming, et al.Numerical simulation of multi-stage fracturing and optimization of perforation in a horizontal well[J]. Petroleum Exploration and Development, 2017, 44(1): 117-124.
[13] 蔡文军, 吴仲华, 聂云飞, 等. 水射流径向钻孔关键技术及试验研究[J]. 钻采工艺, 2016, 39(4): 1-4.
CAI Wenjun, WU Zhonghua, NIE Yunfei, et al.Key technologies and experimental study on water jet radial drilling[J]. Drilling & Production Technology, 2016, 39(4): 1-4.
[14] 沈忠厚. 高压水射流技术在钻井中的应用[J]. 石油钻采工艺, 1981, 3(1): 8-15.
SHEN Zhonghou.Application of high pressure water jet technology in drilling[J]. Oil Drilling & Production Technology, 1981, 3(1): 8-15.
[15] 王家禄, 沈平平, 陈永忠, 等. 三元复合驱提高原油采收率的三维物理模拟研究[J]. 石油学报, 2005, 26(5): 61-66.
WANG Jialu, SHEN Pingping, CHEN Yongzhong, et al.3-D physical modeling of enhanced oil recovery by alkali-surfactant-polymer flooding[J]. Acta Petrolei Sinica, 2005, 26(5): 61-66.
[16] 沈平平, 王家禄, 田玉玲, 等. 三维油藏物理模拟的饱和度测量技术研究[J]. 石油勘探与开发, 2004, 31(增刊1): 71-76.
SHEN Pingping, WANG Jialu, TIAN Yuling, et al.Saturation measurement technique for 3D reservoir physical modeling[J]. Petroleum Exploration and Development, 2004, 31(Supp.1): 71-76.
