Fracturing Technology for a V-Shaped Horizontal Well Cluster in the Yanchuannan CBM Field
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摘要: 延川南煤层气田存在单井产气量低、生产成本高和投资回收期长的问题,为此,进行了煤层气V形水平井组压裂技术研究。在统计该气田已压裂井裂缝方位的基础上,预测待压裂井的裂缝方位,依据煤层厚度及2口水平井水平段的埋深与夹角设计裂缝位置及裂缝长度,并优选分段压裂工艺、压裂液、支撑剂及压裂参数,形成了延川南煤层气V形水平井组压裂技术。该压裂技术在延川南煤层气田3组V形水平井组进行了应用,累计压裂29段,平均每段用液量881 m3、加砂量49.4 m3,压裂成功率90%,平均产气量是定向井的6.18倍,投入产出比低于定向井。现场应用表明,煤层气V形水平井组压裂技术可以提高单井产气量,降低生产成本,缩短投资回收期。Abstract: The Yanchuannan CBM Field is characterized by low single-well gas production, high production cost, and long payback period to recover the initial investment. In order to solve these problems, the V-shaped horizontal well cluster fracturing technology was studied for CBM development. Based on the statistics of fracture azimuths in the wells fractured in this CBM Field, it was possible to predict the fracture azimuths of wells to be fractured. Considering the coalbed thickness and the burial depth as well as inclined angle of horizontal section in two horizontal wells, the fracture positions and lengths were designed. After optimizing staged fracturing, fracturing fluids, proppant and fracturing parameters, the fracturing technology for V-shaped horizontal well cluster in the Yanchuannan CBM Field was established. This technology was applied in three V-shaped horizontal well clusters in the South Yanchuan CBM Field, cumulative fracturing were 29 stages, average fluid volume in each stage was 881 m3,the proppant volume added was 49.4 m3. As a result, the fracturing success ratio reached 90%, the average gas production of horizontal well was 6.18 times of that of directional well, and the input-output ratio was higher than that of the directional well. Field applications demonstrated that the fracturing technology for a V-shaped horizontal well cluster can enhance single-well CBM production, reduce the production cost, and shorten the payback period of investment.
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Keywords:
- CBM /
- fracturing /
- V-shaped horizontal well cluster /
- fracturing fluid /
- proppant /
- Yan 5-V1 well cluster /
- Yanchuannan CBM Field
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[1] 杨力.延川南煤层气工区地层漏失特点及对策[J].中国煤层气,2011,8(3):8-10. YANG Li.Characteristics and counter-measures against loss of circulation in strata in Yanchuannan CBM work section[J].China Coalbed Methane,2011,8(3):8-10. [2] 路艳霞,张飞燕,吴英.延川南地区煤层气资源潜力分析[J].煤,2011,20(8):55-57,83. LU Yanxia,ZHANG Feiyan,WU Ying.Coalbed methane potential analysis in Yanchuan South District[J].Coal,2011,20(8):55-57,83. [3] 龙志平,袁明进,朱智超.延川南煤层气V型水平井组钻井关键技术研究[J].中国煤层气,2012,12(6):12-15. LONG Zhiping,YUAN Mingjin,ZHU Zhichao.Study on key drilling techniques on CBM V-type horizontal well grouping in Yanchuan South[J].China Coalbed Methane,2012,12(6):12-15. [4] 杜发勇,张恩仑,张学政,等.压裂施工中管路摩阻计算方法分析与改进意见探讨[J].钻采工艺,2002,25(5):41-43. DU Fayong,ZHANG Enlun,ZHANG Xuezheng,et al.The analysis and improvement of friction calculation method in fracturing operation[J].Drilling Production Technology,2002,25(5):41-43. [5] 张高群,刘通义.煤层压裂液和支撑剂的研究及应用[J].油田化学,1999,16(1):17-20. ZHANG Gaoqun,LIU Tongyi.Hydrofracturing fluid and proppant for coalbed gas reservoirs:research and use[J].Oilfield Chemistry,1999,16(1):17-20. [6] 辛军,郭建春,赵金洲,等.砂泥岩交互储层支撑剂导流能力实验及应用[J].西南石油大学学报(自然科学版),2010,32(3):80-84. XIN Jun,GUO Jianchun,ZHAO Jinzhou,et al.Experimental study on and field appliance of proppant conductivity in alternating formations of sandstone and shale[J].Journal of Southwest Petroleum University(Science Technology Edition),2010,32(3):80-84. [7] 张鹏.煤层气井压裂液流动和支撑剂分布规律研究[D].东营:中国石油大学(华东)石油工程学院,2011:42-45. ZHANG Peng.Fracturing fluid flow and proppant distributing law in CBM well[J].Dongying:China University of Petroleum(Huadong),School of Petroleum Engineering,2011:42-45. [8] 付玉,郭肖,龙华.煤层气储层压裂水平井产能计算[J].西南石油学院学报,2003,25(3):44-46. FU Yu,GUO Xiao,LONG Hua.Production method of fracturing horizontal well in coalbed gas[J].Journal of Southwest Petroleum Institute,2003,25(3):44-46. [9] 张洪,何爱国,杨风斌,等."U"型井开发煤层气适应性研究[J].中外能源,2011,16(12):33-36. ZHANG Hong,HE Aiguo,YANG Fengbin,et al.Study on the adaptability of the U-shape wells on developing the coalbed methane[J].Sino-Global Energy,2011,16(12):33-36. [10] CIPOLLA C L.Modeling production and evaluating fracture performance in unconventional gas reservoirs[J].Journal of Petroleum Technology,2009,61(9):84-90.
[11] FALLAHZADEH S A H,SHADIZADEH R S,POURAFSHARY P.Dealing with the challenges of hydraulic fracture initiation in deviated-cased perforated boreholes[R].SPE 132797,2010.
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