Fuzzy-Ball Fluid Assisted Polymer Flooding to Enhance Oil Recovery in Heterogeneous Conglomerate Reservoirs

doi:10.7657/XJPG20200308

Abstract

Abstract:

When highly permeable pathway coexists with low permeable pathway in heterogeneous conglomerate reservoirs, it is difficult to significantly improve oil recovery by applying conventional polymer flooding. Vesicles in fuzzy-ball fluids can enter and accumulate under the low flow resistance of the highly permeable pathways, then reduces the flow resistance difference between the highly and low permeable pathways, causing displacing medium to go into the low permeable zones and then improving oil recovery. In this paper, an artificial core with the size of 45 mm×45 mm×300 mm and the permeability ranging from 200 mD to 1 200 mD was selected to simulate various flow pathways and cores with the permeability of 10–1 200 mD were connected in parallel to simulate heterogeneous reservoir. With the displacement pressure of 0.11–0.57 MPa, the difference of the oil recovery factor between highly permeable core and low permeable core ranged from 16.69% to 37.93% after waterflooding and polymer flooding, which increased with the rise of the core permeability ratio. Then 0.6 PV fuzzy-ball fluid was injected and the recovery factor of the low permeable core was 11.15%–19.97% higher than that of the highly permeable core with the displacement pressure of 33.89–39.12 MPa, indicating the displacing medium flowing into the low permeable core, and the oil recovery factor could be improved by 8.17%–11.54%. Field tests of fuzzy-ball fluids in TX well and TY well in Block Qidong-1 of Karamay oilfield were carried out and 150 m ³ and 123 m ³ fuzzy-ball fluids were injected into the two wells, respectively, and the wellhead pressures of the two wells were improved by 4.70 MPa and 1.28 MPa, respectively. After 90 days of the injection operation, the daily oil production of the two tested wells increased by 64.15% and 17.74%, respectively, and the overall watercut decreased by 7.94% and 10.91%, respectively, proving that the fuzzy-ball fluid assisted polymer flooding technology was feasible to enhance oil recovery.

Key words: conglomerate reservoir, heterogeneity, permeability, polymer flooding, fuzzy-ball fluid, selective plugging, EOR

CLC Number:

TE357.2

WEI Panfeng, ZHENG Lihui, JI Cheng, CHEN Qilong, HUANG Ying, FAN Aibin. Fuzzy-Ball Fluid Assisted Polymer Flooding to Enhance Oil Recovery in Heterogeneous Conglomerate Reservoirs[J]. Xinjiang Petroleum Geology, 2020, 41(3): 307-313.

Figures/Tables 6

Fig. 1.

Table 1

Table 2

Fig. 2.

Fig. 3.

Fig. 4.

References 33

[1]	钱根葆, 许长福, 陈玉琨 , 等. 砂砾岩储集层聚合物驱油微观机理:以克拉玛依油田七东₁ 区克拉玛依组下亚组为例[J]. 新疆石油地质, 2016,37(1):56-61.
	QIAN Genbao, XU Changfu, CHEN Yukun , et al. Microscopic mechanism of polymer flooding in glutenite reservoir of lower Karamay formation in east district-7(1),Karamay oilfield[J]. Xinjiang Petroleum Geology, 2016,37(1):56-61.
[2]	AL-HAJRI S, MAHMOOD S M, ABDULELAH H . et al. An overview on polymer retention in porous media[J]. Energies, 2018,11(10):2 751-2 770.
[3]	TARIQ K, RALPH F . Can the viscoelasticity of HPAM polymer solution make the polymer flooding compete with gel treatment to improve sweep efficiency:a comparison with different polymer gel systems[R]. SPE 193592-MS, 2019.
[4]	ZAITUN A, RAHBARI R, KOHLER N . Thin polyacrylamide gels for water control in high-permeability production wells[R]. SPE 22785, 1991.
[5]	LIU H, WANG J, YANG Y , et al. A new method for profile control with compound Ion gel before polymer flooding[R]. SPE 93359-MS, 2005.
[6]	蒲万芬, 赵磊, 金发扬 , 等. 新型胶态分散凝胶在多孔介质中的调驱实验研究[J]. 油气藏评价与开发, 2017,7(1):66-71.
	PU Wanfen, ZHAO Lei, JIN Fayang , et al. Profile control experiment of a new colloidal dispersed gel in porous media[J]. Reservoir Evaluation and Development, 2017,7(1):66-71.
[7]	赫恩杰, 杜玉洪, 罗承建 , 等. 华北油田可动凝胶调驱现场试验[J]. 石油学报, 2003,24(6):64-68.
	HE Enjie, DU Yuhong, LUO Chengjian , et al. Field test on movable gel as profile control and flooding in Huabei oilfield[J]. Acta Petrolei Sinica, 2003,24(6):64-68.
[8]	LIU Chao, LIAO Xinwu, ZHANG Yunlai , et al. Field application of polymer microspheres flooding:a pilot test in offshore heavy oil reservoir[R].SPE 158293, 2012.
[9]	娄兆彬, 李涤淑, 范爱霞 , 等. 中原油田文25东块聚合物微球调驱研究与应用[J]. 西南石油大学学报(自然科学版), 2012,34(5):125-132.
	LOU Zhaobin, LI Dishu, FAN Aixia , et al. Experimental evaluation and field application of pre-cross linked polymer particle flooding in eastern Wenliu block 25 of Zhongyuan oilfield[J]. Journal of Southwest Petroleum University (Science & Technology Edition), 2012,34(5):125-132.
[10]	雷光伦, 李文忠, 贾晓飞 , 等. 孔喉尺度弹性微球调驱影响因素[J]. 油气地质与采收率, 2012,19(2):41-43.
	LEI Guanglun, LI Wenzhong, JIA Xiaofei , et al. Study of influencing factors on pore-scale elastic microspheres flooding[J]. Petroleum Geology and Recovery Efficiency, 2012,19(2):41-43.
[11]	杨俊茹, 谢晓庆, 张健 , 等. 交联聚合物微球-聚合物复合调驱注入参数优化设计[J]. 石油勘探与开发, 2014,41(6):727-730.
	YANG Junru, XIE Xiaoqing, ZHANG Jian , et al. Injection parameters optimization of cross-linked polymer microspheres and polymer composite flooding system[J]. Petroleum Exploration and Development, 2014,41(6):727-730.
[12]	杨中建, 贾锁刚, 张立会 , 等. 高温高盐油藏二次开发深部调驱技术与矿场试验[J]. 石油与天然气地质, 2015,36(4):681-687.
	YANG Zhongjian, JIA Suogang, ZHANG Lihui , et al. Deep profile correction for redevelopment of high-temperature and high-salinity reservoirs and pilot test[J]. Oil & Gas Geology, 2015,36(4):681-687.
[13]	王崇阳, 蒲万芬, 赵田红 , 等. 高温高盐油藏新型表面活性剂微球复配体系调驱实验[J]. 油气地质与采收率, 2015,22(6):107-111.
	WANG Chongyang, PU Wanfen, ZHAO Tianhong , et al. Flooding experiment of new surfactant-microspheres system in high temperature and high salinity reservoir[J]. Petroleum Geology and Recovery Efficiency, 2015,22(6):107-111.
[14]	LIANG Shuang, HU Shaoquan, LI Jie , et al. Study on EOR method in offshore oilfield:combination of polymer microspheres flooding and nitrogen flooding[J]. Journal of Petroleum Science and Engineering, 2019,178:629-639.
[15]	杨思玉, 廉黎明, 杨永智 , 等. 用于CO₂驱的助混剂分子优选及评价[J]. 新疆石油地质, 2015,36(5):555-559.
	YANG Siyu, LIAN Liming, YANG Yongzhi , et al. Molecular optimization design and evaluation of miscible processing aids applied to CO₂ flooding[J]. Xinjiang Petroleum Geology, 2015,36(5):555-559.
[16]	杨红斌, 蒲春生, 吴飞鹏 , 等. 空气泡沫调驱技术在浅层特低渗透低温油藏的适应性研究[J]. 油气地质与采收率, 2012,19(6):69-72.
	YANG Hongbin, PU Chunsheng, WU Feipeng , et al. Adaptability study of air-foam flooding technique in shallow ultra-low permeability and low temperature reservoir[J]. Petroleum Geology and Recovery Efficiency, 2012,19(6):69-72.
[17]	张艳辉, 戴彩丽, 徐星光 , 等. 河南油田氮气泡沫调驱技术研究与应用[J]. 断块油气田, 2013,20(1):129-132.
	ZHANG Yanhui, DAI Caili, XU Xingguang , et al. Research and application on nitrogen foam flooding in Henan oilfield[J]. Fault-Block Oil & Gas Field, 2013,20(1):129-132.
[18]	郑力会, 张明伟 . 封堵技术基础理论回顾与展望[J]. 石油钻采工艺, 2012,34(5):1-9
	. ZHENG Lihui, ZHANG Mingwei . Review of basic theory for lost circulation control[J]. Oil Drilling & Production Technology, 2012,34(5):1-9.
[19]	郑力会 . 仿生绒囊钻井液煤层气钻井应用现状与发展前景[J]. 石油钻采工艺, 2011,33(3):78-81.
	ZHENG Lihui . Application state and prospects of bionic fuzzy-ball drilling fluids for coalbed methane drilling[J]. Oil Drilling & Production Technology, 2011,33(3):78-81.
[20]	胡永东, 赵俊生, 陈家明 , 等. 磨80-C1侧钻水平井绒囊钻井液实践[J]. 钻采工艺, 2013,36(1):110-113.
	HU Yongdong, ZHAO Junsheng, CHEN Jiaming , et al. Grinding 80-C1 sidetracking horizontal well fuzzy-ball drilling fluid practice[J]. Drilling & Production Technology, 2013,36(1):110-113.
[21]	温哲豪, 薛亚斐, 白建文 , 等. GX-3井绒囊流体暂堵重复酸化技术[J]. 石油钻采工艺, 2015,37(5):85-88.
	WEN Zhehao, XUE Yafei, BAI Jianwen , et al. Technology of re-acidizing Well GX-3 by temporary plugging with fuzzy-ball fluid[J]. Oil Drilling & Production Technology, 2015,37(5):85-88.
[22]	王珊, 曹砚峰, 姜文卷 , 等. 渤海某油田绒囊暂堵流体修井工艺[J]. 石油钻采工艺, 2015,37(3) : 114-117.
	WANG Shan, CAO Yanfeng, JIANG Wenjuan , et al. Workover technology using fuzzy-ball temporary plugging fluid in Bohai oilfield[J]. Oil Drilling & Production Technology, 2015,37(3) : 114-117.
[23]	郑力会, 魏攀峰, 张峥 , 等 .联探并采:非常规油气资源勘探开发持续发展自我救赎之路[J]. 天然气工业, 2017,37(5):126-140.
	ZHENG Lihui, WEI Panfeng, ZHANG Zheng , et al. Joint exploration and development:A self-salvation road to sustainable development of unconventional oil and gas resources[J]. Natural Gas Industry, 2017,37(5):126-140.
[24]	朱立国, 黄波, 陈维余 , 等. 适于高矿化度地层水地层的稳油控水绒囊流体[J]. 石油钻采工艺, 2016,38(2):216-220.
	ZHU Liguo, HUANG Bo, CHEN Weiyu , et al. Fuzzy-ball fluid for stabilizing oil production and water control in formations with high-salinity water[J]. Oil Drilling & Production Technology, 2016,38(2):216-220.
[25]	郑力会, 孔令琛, 曹园 , 等. 绒囊工作液防漏堵漏机理[J]. 科学通报, 2010,55(1):1-9.
	ZHENG Lihui, KONG Lingchen, CAO Yuan , et al. The mechanism for fuzzy-ball working fluids for controlling & killing lost circulation[J]. Chinese Science Bulletin, 2010,55(1):1-9.
[26]	聂帅帅, 郑力会, 孟尚志 , 等. 绒囊流体控制煤岩储层水力裂缝形态研究[J]. 钻井液与完井液, 2019,36(5):639-645.
	NIE Shuaishuai, ZHENG Lihui, MENG Shangzhi , et al. Control the crack morphology of hydraulic fracture by fuzzy-ball fluid in coal seam[J]. Drilling Fluid & Completion Fluid, 2019,36(5):639-645.
[27]	魏攀峰, 臧勇, 陈现军 , 等. 绒囊钻井液处理煤层气钻井上漏下塌地层的施工工艺[J]. 天然气工业, 2018,38(9):95-102.
	WEI Panfeng, ZANG Yong, CHEN Xianjun , et al. Application of fuzzy-ball drilling fluid technology to CBM gas wells through the strata with lost circulation in the upper parts and collapse in the lower parts[J]. Natural Gas Industry, 2018,38(9):95-102.
[28]	徐后伟, 王海明, 刘荣军 , 等. 砾岩油藏聚合物驱储集层多参数精细评价及应用:以克拉玛依油田七东₁区克拉玛依组下亚组砾岩油藏为例[J]. 新疆石油地质, 2018,39(2):169-175.
	XU Houwei, WANG Haiming, LIU Rongjun , et al. Fine multiparameter evaluation for polymer flooding in conglomerate reservoirs and its application:a case study from lower Karamay formation in District Qidong-1,Karamay Oilfield[J]. Xinjiang Petroleum Geology, 2018,39(2):169-175.
[29]	王业飞, 曲正天, 张菁 , 等. 高渗区分布形态对砾岩油藏聚合物驱窜流的影响[J]. 油气地质与采收率, 2019,26(6):61-69.
	WANG Yefei, QU Zhengtian, ZHANG Jing , et al. Influence of distribution patterns of high-permeability zones on polymer crossflow in conglomerate oil reservoir[J]. Petroleum Geology and Recovery Efficiency, 2019,26(6):61-69.
[30]	SETTARI CLEARY A, MICHAEL P . Three-dimensional simulation of hydraulic fracturing[J]. SPE 10504, 1984.
[31]	徐大融, 李相方, 李元生 , 等. 致密储集层空气泡沫驱模拟实验与应用[J]. 新疆石油地质, 2016,37(6):697-702.
	XU Darong, LI Xiangfang, LI Yuansheng , et al. Air foam flooding in tight reservoirs:simulation experiment and application[J]. Xinjiang Petroleum Geology, 2016,37(6):697-702.
[32]	孙建峰, 郭东红, 崔晓东 , 等. 甜菜碱类低界面张力泡沫驱油体系性能研究[J]. 石油钻采工艺, 2014,36(3):92-95.
	SUN Jianfeng, GUO Donghong, CUI Xiaodong , et al. Study on properties of low interfacial tension foam flooding system as betaine[J]. Oil Drilling & Production Technology, 2014,36(3):92-95.
[33]	郑力会, 刘皓, 曾浩 , 等. 流量替代渗透率评价破碎性储层工作流体伤害程度[J]. 天然气工业, 2019,39(12):75-80.
	ZHENG Lihui, LIU Hao, ZENG Hao , et al. Using flow rate instead of permeability to evaluate the degree of formation damage by working fluids in fractured reservoirs[J]. Natural Gas Industry, 2019,39(12):75-80.

实验编号	渗透率/ mD	水驱		聚合物驱		绒囊流体驱		后续聚合物驱		总采收率/ %
实验编号	渗透率/ mD	采收率/ %	最高驱替压力/MPa	采收率/ %	最高驱替压力/MPa	采收率/ %	最高驱替压力/MPa	采收率/ %	最高驱替压力/MPa	总采收率/ %
1	200	33.14	0.19	30.25	0.51	0.27	39.12	0	12.37	63.66
1	10	10.24	0.19	13.56	0.51	11.42	39.12	2.37	12.37	37.59
2	600	36.57	0.14	32.84	0.45	0.45	36.02	0	11.04	69.86
2	10	8.82	0.14	11.73	0.45	15.17	36.02	3.52	11.04	39.24
3	1 200	42.99	0.11	36.13	0.37	0.61	33.89	0	9.85	79.73
3	10	5.06	0.11	10.49	0.37	20.58	33.89	3.89	9.85	40.02