Lithologic Reservoirs ›› 2020, Vol. 32 ›› Issue (3): 166-172.doi: 10.12108/yxyqc.20200316

• PETROLEUM ENGINEERING • Previous Articles    

Experimental study on the surface feature of acid-etched fractures in carbonate rocks

FENG Wei1,2,3, YANG Chen1,3,4, TAO Shanxun1,3, WANG Caizhong1,3, LU Yanying5, ZHANG Lufeng3, ZHOU Fujian3   

  1. 1. College of Petroleum Engineering, China University of Petroleum(Beijing), Beijing 102249, China;
    2. Department of Geosciences, University of Padova, Padova 35131, Italy;
    3. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum(Beijing), Beijing 102249, China;
    4. School ofWater Conservancy, North China University ofWater Resources and Electric Power, Zhengzhou 450046, China;
    5. CCDC Drilling and ProductionTechnology Research Institute, Guanghan 618300, Sichuan, China
  • Received:2019-08-01 Revised:2019-09-09 Online:2020-05-21 Published:2020-04-30

PDF (PC)

377

Abstract: Acid fracturing is a common method for stimulating carbonate reservoir. The surface characteristics of acid-etched fracture is unique due to the non-uniform acid-etching. At present,the research on geometric feature of fracture surface before and after etching is not enough. In this paper,advanced experimental devices were used to obtain real acid-etched fracture samples,then the geometric characteristics of the fracture surface were analyzed by using 3D scanning data,and the new parameters hn and εh were defined to quantitatively describe the fluctuation degree. Furthermore,the change of fracture surface patterns before and after acid-etching were compared. The results show that gullies and holes were formed on the fracture surface and the fluctuation degree increased,the tortuosity decreased along the flow direction and increased vertically to flow direction after acid-etching.

Key words: acid-rock reaction, surface feature, description parameters, fluctuation degree

CLC Number: 

  • TE34
[1] 李爱山.碳酸盐岩裂缝性油藏复合酸压技术研究.东营:中国石油大学(华东),2007. LI A S. Research and application of combination acid and fracturing technology in carbonate fracture reservoir. Dongying:China University of Petroleum (East China),2007.
[2] 冯炜,杨晨,周福建,等.气井携砂数值分析方法.断块油气田,2018,25(4):502-505. FENG W,YANG C,ZHOU F J,et al. Numerical analysis method of gas well with sand. Fault-Block Oil & Gas Field,2018,25(4):502-505
[3] 刘航宇,田中元,徐振永.基于分形特征的碳酸盐岩储层孔隙结构定量评价.岩性油气藏,2017,29(5):97-105. LIU H Y,TIAN Z Y,XU Z Y. Quantitative evaluation of carbonate reservoir pore structure based on fractal characteristics. Lithologic Reservoirs,2017,29(5):97-105.
[4] DENG J,HILL A D,ZHU D. A theoretical study of acid-fracture conductivity under closure stress. SPE Production&Operations,2011,26(1):9-17.
[5] 王蓓,刘向君,司马立强,等.磨溪龙王庙组碳酸盐岩储层多尺度离散裂缝建模技术及其应用.岩性油气藏,2019,31(2):124-133. WANG B,LIU X J,SIMA L Q,et al. Multi-scale discrete fracture modeling technology for carbonate reservoir of Longwangmiao Formation in Moxi area and its application. Lithologic Reservoirs,2019,31(2):124-133.
[6] 侯贵廷.裂缝的分形分析方法.应用基础与工程科学学报, 1994(4):299-305. HOU G T. Fractal analysis of fractures. Journal of Basic Science and Engineering,1994(4):299-305.
[7] 蒋廷学,王海涛,卞晓冰,等.水平井体积压裂技术研究与应用.岩性油气藏,2018,30(3):1-11. JIANG T X,WANG H T,BIAN X B,et al. Volume fracturing technology for horizontal well and its application. Lithologic Reservoirs,2018,30(3):1-11.
[8] BARTON N. Suggested method for the quantitative description of discontinuities in rock masses. International Journal of Rock Mechanics and Mining Sciences&Geomechanics Abstracts. 1978,5(6):319-368.
[9] MANDELBROT B. The fractal geometry of nature. New York:Freeman,1977:278-298.
[10] LANARO F. A random field model for surface roughness and aperture of rock fractures. International Journal of Rock Mechanics&Mining Sciences,2000,37(8):1195-1210.
[11] RUFFET C,FERY J JONAISI A. Acid fracturing treatment:a surface topography analysis of acid etched fractures to determine residual conductivity. SPE Journal,1998,3(3):155-162.
[12] 赵仕俊,陈忠革,伊向艺,等.酸蚀岩板三维激光扫描仪.仪表技术与传感器,2010,42(7):22-24. ZHAO S J,CHEN Z G,YI X Y,et al. Acid corrosion rock 3D laser scan instrument. Instrument Technique and Sensor,2010, 42(7):22-24.
[13] 解慧.考虑裂缝形态导流能力的数字化方法及其规律研究.成都:成都理工大学,2012. XIE H. The exploration on the digital methods considering the fracture morphology conductivity and its regularity. Chengdu University of Technology,2012.
[14] NEUMANN L F,OLIVEIRA T J L D,SOUSA J L A O,et al. Building acid fracture conductivity in highly-confined carbonates. SPE 152164,2012.
[15] 曲冠政,曲占庆,HZELETT R D,等.页岩拉张型微裂缝几何特征描述及渗透率计算.石油勘探与开发,2016,43(2):115-120. QU G Z,QU Z Q,HZELETT R D,et al. Geometrical description and permeability calculation about shale tensile micro-fractures. Petroleum Exploration and Development,2016,43(2):115-120.
[16] LU C,BAI X,LUO Y,et al. New study of etching patterns of acid-fracture surfaces and relevant conductivity. Journal of Petroleum Science&Engineering,2017,159:135-147.
[1] CHENG Jing, YAN Jianping, SONG Dongjiang, LIAO Maojie, GUO Wei, DING Minghai, LUO Guangdong, LIU Yanmei. Low resistivity response characteristics and main controlling factors of shale gas reservoirs of Ordovician Wufeng Formation-Silurian Longmaxi Formation in Changning area，southern Sichuan Basin [J]. Lithologic Reservoirs, 2024, 36(3): 31-39.
[2] WANG Ya, LIU Zongbin, LU Yan, WANG Yongping, LIU Chao. Flow unit division based on SSOM and its production application： A case study of sublacustrine turbidity channels of middle Es3 in F oilfield，Bohai Bay Basin [J]. Lithologic Reservoirs, 2024, 36(2): 160-169.
[3] YANG Zhaochen, LU Yingbo, YANG Guo, HUANG Chun, YI Dalin, JIA Song, WU Yongbin, WANG Guiqing. Pre-CO2 energy storage fracturing technology in horizontal wells for medium-deep heavy oil [J]. Lithologic Reservoirs, 2024, 36(1): 178-184.
[4] YUE Shijun, LIU Yingru, XIANG Yiwei, WANG Yulin, CHEN Fenjun, ZHENG Changlong, JING Ziyan, ZHANG Tingjing. A new method for calculating dynamic reserves and water influx of water-invaded gas reservoirs [J]. Lithologic Reservoirs, 2023, 35(5): 153-160.
[5] ZHAO Changhong, SUN Xinge, LU Yingbo, WANG Li, HU Pengcheng, XING Xiangrong, WANG Guiqing. Physical simulation experiment of steam chamber evolution in compound development of thin-layer ultra-heavy oil flooding and drainage [J]. Lithologic Reservoirs, 2023, 35(5): 161-168.
[6] Lü Dongliang, YANG Jian, LIN Liming, ZHANG Kaili, CHEN Yanhu. Characterization model of oil-water relative permeability curves of sandstone reservoir and its application in numerical simulation [J]. Lithologic Reservoirs, 2023, 35(1): 145-159.
[7] DING Chao, WANG Pan, QIN Yadong, LIANG Xiangjin, ZHENG Aiping, LI Ning, XING Xiangrong. SAGD production performance prediction model based on unsteady heat transfer [J]. Lithologic Reservoirs, 2023, 35(1): 160-168.
[8] MA Kuiqian, LIU Dong, HUANG Qin. Physical simulation experiment of steam flooding in horizontal wells of Neogene heavy oil reservoir in Lvda oilfield,Bohai Sea [J]. Lithologic Reservoirs, 2022, 34(5): 152-161.
[9] MENG Zhiqiang, GE Lizhen, ZHU Xiaolin, WANG Yongping, ZHU Zhiqiang. Oil production contribution evaluation method of gas/water drive in gas-cap and edge-water reservoirs [J]. Lithologic Reservoirs, 2022, 34(5): 162-170.
[10] SONG Chuanzhen, MA Cuiyu. Oil-water flow law of Ordovician fractured-vuggy reservoirs in Tahe Oilfield [J]. Lithologic Reservoirs, 2022, 34(4): 150-158.
[11] LI Tian, DAI Zongyang, LI Yang, HUANG Lei, GONG Zhenchao, ZHAO Xiaoyang, ZHOU Xiaolong, HUANG Lan. Genesis of lacustrine dolomites of the fourth member of Paleogene Shahejie Formation in Leijia area, Western Liao Depression [J]. Lithologic Reservoirs, 2022, 34(2): 75-85.
[12] LI Dongmei, LI Huihui, ZHU Suyang, LI Tao. Modified flowing material balance method for fault-karst reservoirs [J]. Lithologic Reservoirs, 2022, 34(1): 154-162.
[13] LI Chuanliang, WANG Fenglan, DU Qinglong, YOU Chunmei, SHAN Gaojun, LI Binhui, ZHU Suyang. Water displacement rules of sandstone reservoirs at extra-high water-cut stage [J]. Lithologic Reservoirs, 2021, 33(5): 163-171.
[14] MAO Zhiqiang, ZHANG Wen, WU Chunzhou, CHEN Lifeng, CHEN Yadong, LI Gang, ZENG Huiyong, LIU Liang. Flow regulation adaptability of rubber particles in longitudinal double-layer fractured-vuggy reservoirs [J]. Lithologic Reservoirs, 2021, 33(5): 172-180.
[15] KONG Chuixian, BA Zhongchen, CUI Zhisong, HUA Meirui, LIU Yuetian, MA Jing. Stress-sensitive productivity model of fractured horizontal wells in volcanic reservoirs [J]. Lithologic Reservoirs, 2021, 33(4): 166-175.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
[1] WEI Qinlian, ZHENG Rongcai, XIAO Ling,WANG Chengyu, NIU Xiaobing. Influencing factors and characteristics of Chang 6 reservoir in Wuqi area, Ordos Basin[J]. Lithologic Reservoirs, 2007, 19(4): 45 -50 .
[2] WANG Dongqi, YIN Daiyin. Empirical formulas of relative permeability curve of water drive reservoirs[J]. Lithologic Reservoirs, 2017, 29(3): 159 -164 .
[3] LI Yun, SHI Zhiqiang. Study on fluid inclusion of tight sandstone reservoir of Upper Triassic Xujiahe Formation in central Sichuan Basin[J]. Lithologic Reservoirs, 2008, 20(1): 27 -32 .
[4] JIANG Ren, FAN Tailiang, XU Shouli. Concept and techniques of seismic geomorphology[J]. Lithologic Reservoirs, 2008, 20(1): 33 -38 .
[5] ZOU Mingliang, HUANG Sijing, HU Zuowei, FENG Wenli, LIU Haoniannian. The origin of carbonate cements and the influence on reservoir quality of Pinghu Formation in Xihu Sag, East China Sea[J]. Lithologic Reservoirs, 2008, 20(1): 47 -52 .
[6] WANG Bingjie, HE Sheng, NI June, FANG Du. Activity analysis of main faults in Qianquan area, Banqiao Sag[J]. Lithologic Reservoirs, 2008, 20(1): 75 -82 .
[7] CHEN Zhenbiao, ZHANG Chaomo, ZHANG Zhansong, LING Husong, SUN Baodian. Using NMR T2 spectrum distribution to study fractal nature of pore structure[J]. Lithologic Reservoirs, 2008, 20(1): 105 -110 .
[8] ZHANG Houfu, XU Zhaohui. Discussion on stratigraphic-lithologic reservoirs exploration in the aspect of the research history of reservoirs[J]. Lithologic Reservoirs, 2008, 20(1): 114 -123 .
[9] ZHANG Xia. Cultivation of exploration creativity[J]. Lithologic Reservoirs, 2007, 19(1): 16 -20 .
[10] YANG Wuyang, YANG Wencai, LIU Quanxin, WANG Xiwen. 3D frequency and space domain amplitude-preserved migration with viscoelastic wave equations[J]. Lithologic Reservoirs, 2007, 19(1): 86 -91 .
TRENDMD:

Copyright © 2018 Lithologic Reservoirs

Support by Beijing Magtech support@magtech.com.cn