Study on the Casing Erosion Mechanism in Staged Fracturing of Horizontal Wells

doi:10.3969/j.issn.1006-6535.2024.05.015

Abstract

Abstract: The staged fracturing of horizontal wells is an effective method for the development of shale oil.During the fracturing process,long-term operation under high pump pressure and high sand volume conditions leads to erosion of the casing holes,resulting in thinning of the casing wall thickness and uneven reaming at the hole.To address this issue, a numerical simulation study of liquid-solid two-phase flow for casing hole erosion is conducted using the CFD-DDPM method.In this study,the erosion mechanism of casing hole in the process of close-cut volume fracturing is analyzed,and the erosion law of perforation hole and its adjacent area under the influence of different perforation angles,sand content,inlet velocity and particle size is studied.The results show that with the increase of casing perforation angle,the maximum erosion rate at the hole opening exhibits a "tooth" shape variation;with the increase of sand content and inlet velocity,the maximum erosion rate increases gradually,and the erosion area on the inner wall of the pipeline also significantly increases;with the increase of particle size,the maximum erosion rate decreases first and then increases.The numerical simulation of liquid-solid two-phase flow for casing hole erosion based on CFD-DDPM method reveals the mechanism of hole erosion during staged fracturing,which has significant guiding for balanced fracture initiation and extending tool lifespan.

Key words: staged fracturing, erosion, casing perforations, liquid-solid two-phase flow, CFD-DDPM, horizontal wells

CLC Number:

TE28

Zou Linhao, Song Yang, Su Yinao, Li Wei, Zhao Huan, Gai Jingming, Li Zhuolun, Jiao Shengjie. Study on the Casing Erosion Mechanism in Staged Fracturing of Horizontal Wells[J]. Special Oil & Gas Reservoirs, 2024, 31(5): 127-135.

References

[1] 杨浩,李新发,陈鑫,等.低渗透气藏水平井分段压裂分段优化方法研究[J].特种油气藏,2021,28(1):125-129.
YANG Hao,LI Xinfa,CHEN Xin,et al.Study on staged optimization method of staged fracturing for horizontal wells in low-permeability gas reservoir[J].Special Oil & Gas Reservoirs,2021,28(1):125-129.
[2] 慕立俊,李向平,喻文锋,等.超低渗透油藏水平井重复压裂新老缝合理配比研究[J].石油钻探技术,2023,51(3):97-104.
MU Lijun,LI Xiangping,YU Wenfeng,et al.Research on the optimal proportions of the new and old fractures in refracturing of horizontal wells in ultra-low permeability reservoirs[J].Petroleum Drilling Techniques,2023,51(3):97-104.
[3] 刘尧文,明月,张旭东,等.涪陵页岩气井“套中固套”机械封隔重复压裂技术[J].石油钻探技术,2022,50(3):86-91.
LIU Yaowen,MING Yue,ZHANG Xudong,et al.“Casing in casing” mechanical isolation refracturing technology in Fuling shale gas wells[J].Petroleum Drilling Techniques,2022,50(3):86-91.
[4] 刘航铭,胡鑫雨,易先中,等.致密储层聚簇孔定向开采方法及渗流分析[J].断块油气田,2023,30(4):609-615.
LIU Hangming,HU Xinyu,YI Xianzhong,et al.Directional mining method and seepage analysis of clustered pores in tight reservoirs[J].Fault-Block Oil & Gas Field,2023,30(4):609-615.
[5] 杨典森,周云,周再乐.含界面储层水力压裂实验与数值模拟研究进展[J].岩石力学与工程学报,2022,41(9):1771-1794.
YANG Diansen,ZHOU Yun,ZHOU Zaile.A review of experimental and numerical simulation of hydraulic fracturing in reservoirs with interfaces[J].Chinese Journal of Rock Mechanics and Engineering,2022,41(9):1771-1794.
[6] 蒋廷学,肖博,沈子齐,等.陆相页岩油气水平井穿层体积压裂技术[J].石油钻探技术,2023,51(5):8-14.
JIANG Tingxue,XIAO Bo,SHEN Ziqi,et al.Vertical penetration of network fracturing technology for horizontal wells in continental shale oil and gas[J].Petroleum Drilling Techniques,2023,51(5):8-14.
[7] 张宏峰.页岩油水平井压裂后变形套管液压整形技术[J].石油钻探技术,2023,51(5):173-178.
ZHANG Hongfeng.Hydraulic shaping technology of deformed casing after fracturing in horizontal shale oil wells[J].Petroleum Drilling Techniques,2023,51(5):173-178.
[8] 张士诚,杨鹏,邹雨时,等.考虑射孔孔眼磨蚀对多裂缝扩展的影响规律[J].天然气工业,2022,42(10):63-73.
ZHANG Shicheng,YANG Peng,ZOU Yushi,et al.Influence laws of perforation erosion on multi-fracture propagation[J].Natural Gas Industry,2022,42(10):63-73.
[9] 武晓光,黄中伟,李根生,等.“连续管+柔性钻具”超短半径水平井钻井技术研究与现场试验[J].石油钻探技术,2022,50(6):56-63.
WU Xiaoguang,HUANG Zhongwei,LI Gensheng,et al.Research and field test of ultra-short radius horizontal drilling technology combining coiled tubing and flexible BHA[J].Petroleum Drilling Techniques,2022,50(6):56-63.
[10] 孟胡,吕振虎,王晓东,等.基于压裂参数优化的套管剪切变形控制研究[J].断块油气田,2023,30(4):601-608.
MENG Hu,LYU Zhenhu,WANG Xiaodong,et al.Research on casing shear deformation control by optimizing fracturing parameters[J].Fault-Block Oil & Gas Field,2023,30(4):601-608.
[11] 孙欢,朱明明,王伟良,等.长庆页岩油水平井华H90-3井超长水平段防漏堵漏技术[J].石油钻探技术,2022,50(2):16-21.
SUN Huan,ZHU Mingming,WANG Weiliang,et al.Lost circulation prevention and plugging technologies for the ultra-long horizontal section of the horizontal shale oil Well Hua H90-3 in Changqing Oilfield[J].Petroleum Drilling Techniques,2022,50(2):16-21.
[12] 刘绍成,张振南,赵兵,等.考虑岩石蠕变的压裂水平井产能数值模拟及其影响因素[J].断块油气田,2023,30(4):678-684.
LIU Shaocheng,ZHANG Zhennan,ZHAO Bing,et al.Numerical simulation for productivity of fractured horizontal well and its influencing factors considering rock creep [J].Fault-Block Oil & Gas Field,2023,30(4):678-684.
[13] 李凌川,李克永.泾河油田水平井密切割增能体积压裂探索及认识[J].非常规油气,2022,9(4):114-122.
LI Lingchuan,LI Keyong.Exploration and cognition of intensive staged energizing volume fracturing fo rhorizontal wells in Jinghe Oilfield[J].Unconventional Oil & Gas,2022,9(4):114-122.
[14] 易先中,彭灼,周元华,等.高压压裂液对JY-50压裂弯管冲蚀行为影响的数值模拟[J].表面技术,2019,48(2):144-151.
YI Xianzhong,PENG Zhuo,ZHOU Yuanhua, et al.Numerical simulation for erosion behavior of high-pressure fracturing fluids on JY-50 fracturing bend pipe[J].Surface Technology,2019,48(2):144-151.
[15] 朱丽云,王森,王国涛,等.稠油热采四通管冲蚀特性影响因素数值模拟研究[J].表面技术,2022,51(11):244-252,270.
ZHU Liyun,WANG Sen,WANG Guotao,et al.Numerical simulation of influence factors on erosion characteristics of four-way pipe in heavy oil thermal recovery[J].Surface Technology,2022,51(11):244-252,270.
[16] SEDREZ T A,SHIRAZI S A,RAJKUMAR Y R,et al.Experiments and CFD simulations of erosion of a 90 ° elbow in liquid-dominated liquid-solid and dispersed-bubble-solid flows[J].Wear,2019,426-427(Pt A):570-580.
[17] 樊艳芳,李少安,曾德智,等.应急放喷工况井下管柱冲蚀行为研究[J].特种油气藏,2020,27(1):169-174.
FAN Yanfang,LI Shaoan,ZENG Dezhi,et al.String erosion of well with blowout operation[J].Special Oil & Gas Reservoirs,2020,27(1):169-174.
[18] LIN Zhe,SUN Xiwang,YU Tianci,et al.Gas-solid two-phase flow and erosion calculation of gate valve based on the CFD-DEM model[J].Powder Technology,2020,366:395-407.
[19] GUO Oufu,BIE Kainian,ZHENG Zhijian,et al.Numerical simulation on the erosion wear of a multiphase flow pipeline[J].The International Journal of Advanced Manufacturing Technology,2018,96(5-8):1705-1703.
[20] 曾德智,张思松,田刚,等.加砂压裂过程中套管孔眼抗冲蚀性能分析[J].表面技术,2022,51(6):204-213.
ZENG Dezhi,ZHANG Sisong,TIAN Gang,et al.Analysis of erosion resistance of casing perforation in the process of sand fracturing[J].Surface Technology,2022,51(6):204-213.
[21] XU Liuyun,WU Feng,REN Haibo,et al.Experimental and numerical investigation on erosion of circular and elliptical immersed tubes in fluidized bed[J].Powder Technology,2022,409(4):117820.
[22] SRINIKETH A,ALI B Ar.Computational investigation of hydrodynamics and solid circulation in fluidized bed column[J].Chemical Engineering Communications,2019,208(6):1-8.
[23] FERZIGER J H,PERIC M.Computational methods for fluid dynamics[J].Physics Today,1997,50(3):80-84.
[24] MENTER F R.Two-equation eddy-viscosity turbulence models for engineering applications[J].AIAA Journal,1994,32(8):1598-1605.
[25] YAKHOT V,ORSZAG S A.Renormalization group analysis of turbulence.I.basic theory[J].Journal of Scientific Computing,1986,1(1):3-51.
[26] OKA Y I,OKAMURA K,YOSHIDA T.Practical estimation of erosion damage caused by solid particle impact:part 1:effects of impact parameters on a predictive equation[J].Wear,2005,259(1-6):95-101.
[27] TABAKOFF W,KOTWAL R,HAMED A.Erosion study of different materials affected by coal ash particles[J].Wear,1979,52(1):161-173.
[28] ZHAO Xiangyang,CAO Xuewen,ZHANG Jianing,et al.Experimental and numerical investigation of erosion in plugged tees for liquid-solid flow[J].International Journal of Multiphase Flow,2023,160:104348.