Adaptability Evaluation of Nitrogen Foam Flooding After Water-Flooding in Low-Permeability Light Oil Reservoirs

doi:10.7657/XJPG20200614

Abstract

Abstract:

After water-flooding development, the low-permeability light oil reservoirs have entered a stage of high water cut, and the reservoirs have been seriously water-flooded in Tuha oilfield, so no water flooding measures seem effective. To improve the recovery, it is urgent to find other EOR technologies. Since high-viscosity fluid (i.e. polymer) is not applicable for the low-permeability reservoirs, laboratory experiments were carried out to investigate the oil displacement efficiency and its influencing factors based on water flooding, nitrogen foam flooding and nitrogen foam flooding after water flooding. The experimental results show that the oil displacement efficiency by water flooding increases with the increase of reservoir permeability and has a better logarithmic relationship with the permeability; the nitrogen foam flooding efficiency is 67.66%, which is 10.62% higher than that of water-flooding; nitrogen foam flooding after water flooding can improve the oil displacement efficiency by about 9.63% on the basis of water flooding. The residual resistance factor of the foam used in the experiments is greater than 1, which indicates that the recovery after water-flooding has been increased by using nitrogen foam with water plugging and profile modification. It is concluded that the nitrogen foam flooding is suitable for the low-permeability light oil reservoirs according to its mechanism and experimental results in Tuha oilfield.

Key words: Tuha oilfield, low-permeability reservoir, light oil reservoir, water flooding, nitrogen foam flooding, oil displacement efficiency, recovery factor, residual resistance factor

CLC Number:

TE357

XIAO Zhipeng, YANG Shenglai, MA Xueli, HAN Jifan, WANG Mengyu. Adaptability Evaluation of Nitrogen Foam Flooding After Water-Flooding in Low-Permeability Light Oil Reservoirs[J]. Xinjiang Petroleum Geology, 2020, 41(6): 729-734.

Figures/Tables 10

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References 20

[1]	沈平平. 油水在多孔介质中的运动理论和实践[M]. 北京: 石油工业出版社, 2000: 50-86.
	SHEN Pingping. Theory and practice of oil-water movement in porous media[M]. Beijing: Petroleum Industry Press, 2000: 50-86.
[2]	相天章, 李鲁斌. 驱油效率和体积波及系数的确定[J]. 新疆石油地质, 2004,25(2):202-203.
	XIANG Tianzhang, LI Lubin. Detemination of displacement efficiency and volumetric sweep efficiency[J]. Xinjiang Petroleum Geology, 2004,25(2):202-203.
[3]	邵东波, 谢先奎, 张高源, 等. 超低渗透砂岩油藏微观渗流特征及驱油效率的影响因素[J]. 地球物理学进展, 2017,32(4):1 628-1 635.
	SHAO Dongbo, XIE Xiankui, ZHANG Gaoyuan, et al. Micro-flow characteristics and influencing factors of oil displacement efficiency in ultra-low permeability sandstone reservoir[J]. Progress in Geophysics, 2017,32(4):1 628-1 635.
[4]	赵云海, 王健, 吕柏林, 等. 高温高压油藏纳米颗粒提高CO₂泡沫驱油效果实验[J]. 新疆石油地质, 2019,40(6):708-713.
	ZHAO Yunhai, WANG Jian, LYU Bolin, et al. Experimental study on nano-particle/CO₂ foam flooding effect in high-temperature high-pressure reservoirs[J]. Xinjiang Petroleum Geology, 2019,40(6):708-713.
[5]	丁景辰, 杨胜来, 聂向荣, 等. 低渗-特低渗油藏油水相对渗透率及水驱油效率影响因素研究[J]. 科学技术与工程, 2013,13(36):10 903-10 907.
	DING Jingchen, YANG Shenglai, NIE Xiangrong, et al. Study on influencing factors of oil-water relative permeability and water-flooding efficiency in low permeability and extra-low permeability reservoir[J]. Science Technology and Engineering, 2013,13(36):10 903-10 907.
[6]	纪淑红, 田昌炳, 石成方, 等. 高含水阶段重新认识水驱油效率[J]. 石油勘探与开发, 2012,39(3):338-345.
	JI Shuhong, TIAN Changbing, SHI Chengfang, et al. New understanding on water-oil displacement efficiency in a high water-cut stage[J]. Petroleum Exploration and Development, 2012,39(3):338-345.
[7]	徐冰涛, 杨占红, 刘滨, 等. 鄯善油田注空气提高原油采收率实验研究[J]. 吐哈油气, 2005,10(2):137-140.
	XU Bingtao, YANG Zhanhong, LIU bin,et al. Experimental research on air injection-based EOR in Shanshan oilfield[J]. Tuha Oil & Gas, 2005,10(2):137-140.
[8]	徐冰涛, 杨占红, 刘滨, 等. 吐哈盆地鄯善油田注空气实验研究[J]. 油气地质与采收率, 2004,11(6):56-57.
	XU Bingtao, YANG Zhanhong, LIU bin,et al. Laboratory research of air injection in Shanshan oilfield in Tuha basin[J]. Petroleum Geology and Recovery Efficiency, 2004,11(6):56-57.
[9]	赵继勇, 熊维亮, 范伟, 等. 特低渗透油藏提高采收率驱油体系筛选及应用[J]. 新疆石油地质, 2019,40(6):720-724.
	ZHAO Jiyong, XIONG Weiliang, FAN Wei, et al. Selection and application of oil displacement system for EOR in extra-low permeability reservoirs[J]. Xinjiang Petroleum Geology, 2019,40(6):720-724.
[10]	梁芹, 李果年, 杜进宏. 吐哈油田温五块波及状况分析[J]. 新疆石油地质, 2001,22(4):328-329.
	LIANG Qin, LI Guonian, DU Jinhong. Sweep performance analysis of the Block Wen No.5 in Turpan-Hami basin[J]. Xinjiang Petroleum Geology, 2001,22(4):328-329.
[11]	蔡忠. 储集层孔隙结构与驱油效率关系研究[J]. 石油勘探与开发, 2000,27(6):45-46.
	CAI Zhong. The study on the relationship between pore structure and displacement efficiency[J]. Petroleum Exploration and Development, 2000,27(6):45-46.
[12]	商琳琳, 许建红. 致密油层空气泡沫驱油提高驱油效率实验研究[J]. 油田化学, 2019,36(3):489-493.
	SHANG Linlin, XU Jianhong. Experimental study on improving oil displacement efficiency by air-foam flooding in tight oil layer[J]. Oilfield Chemistry, 2019,36(3):489-493.
[13]	张泉, 付美龙, 孙晶, 等. 特低渗油藏氮气泡沫驱油效率实验研究其现场应用[J]. 西安石油大学学报(自然科学版), 2019,34(2):54-59.
	ZHANG Quan, FU Meilong, SUN Jing, et al. Experimental study of nitrogen foam flooding efficiency in ultra-low permeability reservoirs and its field application[J]. Journal of Xi’an Shiyou University (Natural Science Edition), 2019,34(2):54-59.
[14]	王璐, 杨胜来, 孟展, 等. 高凝油油藏水驱油效率影响因素[J]. 大庆石油地质与开发, 2016,35(5):69-73.
	WANG Lu, YANG Shenglai, MENG Zhan, et al. Influencing factors of the oil displaced efficiency by water for high pour-point reservoirs[J]. Petroleum Geology & Oilfield Development in Daqing, 2016,35(5):69-73.
[15]	罗洪, 俞启泰. 我国河流相与三角洲相储层水驱油效率研究[J]. 断块油气田, 2000,7(1):46-47.
	LUO Hong, YU Qitai. Study of oil displacement efficiency for fluvial and delta facies reservoirs of oilfield in China[J]. Fault-Block Oil & Gas Field, 2000,7(1):46-47.
[16]	李劲峰, 曲志浩, 赵斌. 鄯善油田三间房组油层驱油效率与渗透率变异系数突进系数和级差关系的研究[J]. 西安工程学院学报, 1999,21(1):39-43.
	LI Jinfeng, QU Zhihao, ZHAO Bin. Reasearch for the relationship between sweep efficiency and permeability variation,dart-coefficient,contrast-coefficient of Sanjianfang reservoir in Shanshan oil field[J]. Journal of Xi’an Engineering University, 1999,21(1):39-43.
[17]	鄢捷年. 油藏岩石润湿性对注水过程中驱油效率的影响[J]. 石油大学学报(自然科学版), 1998,22(3):43-46.
	YAN Jienian. Effect of rock wettability on oil recovery by water-flooding[J]. Journal of the University of Petroleum,China, 1998,22(3):43-46.
[18]	任大忠, 刘登科, 周兆华, 等. 致密砂岩油藏水驱油效率及微观影响因素研究:以鄂尔多斯盆地华庆地区三叠系长6储层为例[J]. 电子显微学报, 2019,38(4):364-375.
	REN Dazhong, LIU Dengke, ZHOU Zhaohua, et al. Research on waterflooding efficiency of tight sandstone reservoir and its microscopic influence factors:taking the Triassic Chang 6 member in Huaqing area,Ordos basin,NW China as an example[J]. Journal of Chinese Electron Microscopy Society, 2019,38(4):364-375.
[19]	孟令君. 低渗油藏空气/空气泡沫驱提高采收率技术实验研究[D]. 山东青岛:中国石油大学(华东), 2011.
	MENG Lingjun. Experimental study on improving oil recovery by air/air-foam flooding in low permeable reservoir[D]. Qingdao,Shandong:China University of Petroleum(East China), 2011.
[20]	吴灿. 泡沫体系在孔隙介质中的流变性及渗流特性[D]. 成都:成都理工大学, 2014.
	WU Can. Rheological properties and seepage characteristics of foam system in porous media[D]. Chengdu:Chengdu University of Technology, 2014.