Experimental Evaluation on Microsphere-Natural Gas Flooding in Buried-Hill Reservoirs

doi:10.7657/XJPG20220413

Abstract

Abstract:

During the development of fractured buried-hill reservoirs which are highly heterogeneous, fingering and channeling occur frequently; therefore, blocking high permeability channels such as fractures and large pores is an effective measure to improve oil recovery of these reservoirs. Through laboratory experiments on flowing in the cores from the B1 buried-hill reservoir, the plugging effect of microspheres on both fractures and large pores in the cores was evaluated, and the effectiveness of microsphere-natural gas flooding to improve the recovery of remaining oil was discussed. The results show that the oil displacement efficiency of water flooding or natural gas flooding is inapparent. When microsphere flooding is adopted, the microspheres significantly increase the resistance coefficient and injection pressure due to their expansion and plugging after entering the core. The microsphere size directly affects the plugging effect. If the microsphere size is too small, good plugging effect cannot be achieved; if the microsphere size is too large, microsphere injection is difficult. The expansion, plugging, unplugging, deformation plugging of the injected microspheres and the dissolution of the injected natural gas are synergic to effectively inhibit the fingering and channeling of displacing fluid during the development of fractured buried-hill reservoirs. Therefore, microsphere-natural gas flooding can greatly improve the recovery degree of remaining oil.

Key words: buried-hill reservoir, microsphere, natural gas flooding, oil displacement efficiency, deformation plugging, injection volume

CLC Number:

TE357

CHEN Shijie, SUN Lei, PAN Yi, WANG Yajuan, LIN Youjian, CHEN Fenjun. Experimental Evaluation on Microsphere-Natural Gas Flooding in Buried-Hill Reservoirs[J]. Xinjiang Petroleum Geology, 2022, 43(4): 468-473.

Figures/Tables 6

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References 20

[1]	YAO Chuanjin, LEI Guanglun, CATHLES L M, et al. Pore-scale investigation of micron-size polyacrylamide elastic microspheres (MPEMs) transport and retention in saturated porous media[J]. Environmental Science & Technology, 2014, 48:5329-5335. doi: 10.1021/es500077s
[2]	苏航, 周福建, 刘洋, 等. 乳液在多孔介质中的微观赋存特征及调驱机理[J]. 石油勘探与开发, 2021, 48(6):1241-1249.
	SU Hang, ZHOU Fujian, LIU Yang, et al. Pore-scale investigation on occurrence characteristics and conformance control mechanisms of emulsion in porous media[J]. Petroleum Exploration and Development, 2021, 48(6):1241-1249.
[3]	孟祥海, 张云宝, 王楠, 等. 微观非均质调驱剂油藏适应性及液流转向效果[J]. 油田化学, 2020, 37(3):415-420.
	MENG Xianghai, ZHANG Yunbao, WANG Nan, et al. Adaptability and liquid flow diversion effect of microheterogeneous regulator[J]. Oilfield Chemistry, 2020, 37(3):415-420.
[4]	文玉莲, 杜志敏, 郭肖, 等. 裂缝性油藏注气提高采收率技术进展[J]. 西南石油学院学报, 2005, 27(6):48-52.
	WEN Yulian, DU Zhimin, GUO Xiao, et al. Development of EOR by gas injection in fractured reservoirs[J]. Journal of Southwest Petroleum Institute, 2005, 27(6):48-52.
[5]	李翔, 瞿瑾, 鞠野, 等. 深部调驱用纳米聚合物微球的研究进展[J]. 化学工业与工程, 2021, 38(2):48-54.
	LI Xiang, QU Jin, JU Ye, et al. Research progress of nanoscale polymer microspheres for deep profile control and flooding[J]. Chemical Industry and Engineering, 2021, 38(2):48-54.
[6]	李欣儒, 张雷, 张彦明, 等. 聚合物微球调驱剂的制备及其在多孔介质中的微观渗流规律[J]. 合成化学, 2019, 27(6):461-464.
	LI Xinru, ZHANG Lei, ZHANG Yanming, et al. Preparation of polymer microspheres regulating agent and microscopic percolation law in porous media[J]. Chinese Journal of Synthetic Chemistry, 2019, 27(6):461-464.
[7]	雷光伦, 郑家朋. 孔喉尺度聚合物微球的合成及全程调剖驱油新技术研究[J]. 中国石油大学学报(自然科学版), 2007, 31(1):87-90.
	LEI Guanglun, ZHENG Jiapeng. Composing of pore-scale polymer microsphere and its application in improving oil recovery by profile control[J]. Journal of China University of Petroleum(Edition of Natural Science), 2007, 31(1):87-90.
[8]	孟令韬, 王彦玲, 许宁, 等. 一种低渗油藏深部调驱用聚合物纳米微球的制备与性能研究[J]. 应用化工, 2021, 50(7):1757-1760.
	MENG Lingtao, WANG Yanling, XU Ning, et al. Study on preparation and performance of polymer nanospheres for deep profile control and flooding in low permeability reservoir[J]. Applied Chemical Industry, 2021, 50(7):1757-1760.
[9]	YANG Hongbin, KANG Wanli, YIN Xia, et al. Research on matching mechanism between polymer microspheres with different storage modulus and pore throats in the reservoir[J]. Powder Technology, 2017, 313:191-200. doi: 10.1016/j.powtec.2017.03.023
[10]	LIN Meiqin, ZHANG Guiqing, HUA Zhao, et al. Conformation and plugging properties of crosslinked polymer microspheres for profile control[J]. Colloids and Surfaces A:Physicochemical and Engineering Aspects, 2015, 477:49-54. doi: 10.1016/j.colsurfa.2015.03.042
[11]	张卓, 王正欣, 薛国勤, 等. 中高渗胶结油藏聚合物驱后非均相复合驱技术[J]. 新疆石油地质, 2021, 42(4):475-479.
	ZHANG Zhuo, WANG Zhengxin, XUE Guoqin, et al. Heterogeneous compound flooding technology for medium-high permeability consolidated reservoir after polymer flooding[J]. Xinjiang Petroleum Geology, 2021, 42(4):475-479.
[12]	孙焕泉, 王涛, 肖建洪, 等. 新型聚合物微球逐级深部调剖技术[J]. 油气地质与采收率, 2006, 13(4):77-79.
	SUN Huanquan, WANG Tao, XIAO Jianhong, et al. Novel technique of in-depth profile control step by step by polymer microspheres[J]. Petroleum Geology and Recovery Efficiency, 2006, 13(4):77-79.
[13]	樊兆琪, 程林松. 聚合物微球调剖封堵渗流场可视化及矿场试验[J]. 科学技术与工程, 2012, 12(29):7543-7546.
	FAN Zhaoqi, CHENG Linsong. Polymer microspheres profile controlling and plugging seepage field visualization and pilot test[J]. Science Technology and Engineering, 2012, 12(29):7543-7546.
[14]	刘承杰, 安俞蓉. 聚合物微球深部调剖技术研究及矿场实践[J]. 钻采工艺, 2010, 33(5):62-64.
	LIU Chengjie, AN Yurong. Research and application of polymer microspheres deep profile control technology[J]. Drilling & Production Technology, 2010, 33(5):62-64.
[15]	李翔, 瞿瑾, 鞠野, 等. 纳米聚合物微球的封堵性及驱油性能[J]. 化学工业与工程, 2021, 38(3):57-63.
	LI Xiang, QU Jin, JU Ye, et al. Plugging property and oil displacement performance of nanoscale polymer microspheres[J]. Chemical Industry and Engineering, 2021, 38(3):57-63.
[16]	周海燕, 刘斌, 孙强, 等. 海上河流相稠油油田纳米微球多轮次调驱效果评价研究[J]. 新疆石油天然气, 2021, 17(1):60-64.
	ZHOU Haiyan, LIU Bin, SUN Qiang, et al. Study on the effect evaluation of nanoscale microsphere multi-wheel drive in offshore fluvial heavy oil field[J]. Xinjiang Oil & Gas, 2021, 17(1):60-64.
[17]	魏攀峰, 郑力会, 纪成, 等. 非均质砾岩油藏绒囊流体辅助聚合物驱效果[J]. 新疆石油地质, 2020, 41(3):307-313.
	WEI Panfeng, ZHENG Lihui, JI Cheng, et al. Fuzzy-ball fluid assisted polymer flooding to enhance oil recovery in heterogeneous conglomerate reservoirs[J]. Xinjiang Petroleum Geology, 2020, 41(3):307-313.
[18]	刘娅菲, 杨静雯, 姚婷玮, 等. 纳米聚合物微球对高渗透介质封堵效果评价及作用机理[J]. 油气地质与采收率, 2020, 27(6):130-135.
	LIU Yafei, YANG Jingwen, YAO Tingwei, et al. Investigation and analysis on the plugging performance of nanoscale polymer microspheres on high-permeability porous media[J]. Petroleum Geology and Recovery Efficiency, 2020, 27(6):130-135.
[19]	庄建, 张维, 梁云, 等. 多重介质聚合物微球调驱机理研究及应用[J]. 石油化工高等学校学报, 2020, 33(6):49-55.
	ZHUANG Jian, ZHANG Wei, LIANG Yun, et al. Study and application of profile control and flooding mechanism of multi-media polymer microspheres[J]. Journal of Petrochemical Universities, 2020, 33(6):49-55.
[20]	郑斌, 李菊花. 基于Kozeny-Carman方程的渗透率分形模型[J]. 天然气地球科学, 2015, 26(1):193-198.
	ZHENG Bin, LI Juhua. A new fractal permeability model for porous media based on Kozeny-Carman equation[J]. Natural Gas Geoscience, 2015, 26(1):193-198.