Drilling Fluid Technology for Long Horizontal Shale Gas Well JY2-5HF in China
-
摘要: JY2-5HF井是中石化在重庆涪陵页岩气田部署的一口开发评价井,完钻井深5965 m,水平段长3065 m。该井二开中下部钻遇地层主要为泥页岩井段,存在井壁垮塌、卡钻、漏失等潜在风险,使用多元协同防塌水基钻井液(BT-200钻井液)钻井,主要处理剂有抑制剂BT-200、K-HPAN、KCl、井壁稳定剂、乳化沥青、非渗透处理剂、聚合醇、多功能固体润滑剂和QS-2。水平段要求钻井液除了具有较强的化学及物理防塌能力,还须具有良好的润滑及悬浮性能,采用了油水比为90:10的油基钻井液,水相为26% CaCl2水溶液,破乳电压控制在900 V以上。现场实践表明,该套钻井液较好地满足了井下和钻井工程的需要;页岩气井长水平段钻进较适宜采用旋转导向和油基钻井液;压裂后测出的地层压力系数普遍比钻进时高0.1~0.2,建议设计钻井液密度时减去。Abstract: Well JY2-5HF, completed at depth of 5,965 m, is an appraisal well drilled in Fuling shale gas feld, Chongqing, by Sinopec. The length of the horizontal section of this well is 3,065 m. The second interval of this well penetrated shale formations in its middle and lower sections and is at risk of borehole wall sloughing, pipe sticking and mud losses. An anti-sloughing drilling fluid, BH-200, formulated with synergetic additives, such as shale inhibitor BT-200, K-HPAN, KCl, a wellbore stabilizer, an emulsifed asphalt, a non-penetration additive, polyglycol, a multi-function solid lubricants and QS-2, was used to drill the well. The horizontal section of the well required that the drilling fluid should have good physical and chemical wellbore stabilizing capacity, good lubricity and good suspending capacity. An oil base mud, with O/W of 90:10 (26% CaCl2 solution) and electric stability of at least 900 V, was used to drill the horizontal section. Field operations showed that the drilling fluids used well satisfed the needs of downhole and drilling engineering. Rotary steering and oil base drilling fluid are suitable for long horizontal drilling in shale gas wells. Formation pressure coeffcient measured after fracturing was generally higher than the pressure coeffcient during drilling by 0.1-0.2, and it is thus advised that this value be deducted when designing the density of a drilling fluid.
-
[1] 董大忠, 王玉满, 李新景, 等. 中国页岩气勘探开发新突破及发展前景思考[J]. 天然气工业, 2016, 36(1):19-32.DONG Dazhong, WANG Yuman, LI Xinjing, et al. Break through and prospect of shale gas exploration and development in China[J].Natural Gas Industry, 2016, 36(1):19-32. [2] 景岷嘉, 陶怀志, 袁志平. 疏水抑制水基钻井液体系研究及其在页岩气井的应用[J]. 钻井液与完井液, 2017, 34(1):28-32.JING Minjia, TAO Huaizhi, YUAN Zhiping.Study of hydrophobic inhibitive water base drilling fluid system and application in shale gas well[J]. Drilling Fluid & Completion Fluid, 2017, 34(1):28-32. [3] 明显森, 袁志平, 宾承刚. 长宁页岩气井钻井复杂情况及钻井液工艺技术[J]. 钻井液与完井液, 2017, 34(5):44-49.MING Xiansen, YUAN Zhiping, BIN Chenggang. Drilling challenges and drilling fluid technologies for shale gas drilling in Changning area[J].Drilling Fluid & Completion Fluid, 2017, 34(5):44-49. [4] 刘敬平, 孙金声. 钻井液活度对川滇页岩气地层水化膨胀与分散的影响[J]. 钻井液与完井液,2016,33(2):31-35.LIU Jingping, SUN Jinsheng. Impact of drilling fluids activity on hydration expansion and dispersion in gas shale formations in Chuan or Dian[J].Drilling Fluid & Completion Fluid, 2016, 33(2):31-35. [5] 唐国旺, 于培志. 油基钻井液随钻堵漏技术与应用[J]. 钻井液与完井液, 2017, 34(4):32-37.TANG Guowang, YU Peizhi. Mud loss control while drilling with oil base drilling fluid[J].Drilling Fluid & Completion Fluid, 2017, 34(4):32-37. [6] 梁文利, 宋金初, 陈智源, 等. 涪陵页岩气水平井油基钻井液技术[J]. 钻井液与完井液, 2016, 33(5):19-24.LIANG Wenli, SONG Jinchu, CHEN Zhiyuan, et al. Oil base drilling fluid for drilling shale gas wells in fuling[J]. Drilling Fluid & Completion Fluid, 2016, 33(5):19-24. [7] 龙大清, 樊相生, 王昆, 等. 应用于中国页岩气水平井的高性能水基钻井液[J]. 钻井液与完井液, 2016, 33(1):17-21.LONG Daqing, FAN Xiangsheng, WANG Kun, et al. High performance water base drilling fluids for shale gas drilling[J]. Drilling Fluid & Completion Fluid, 2016, 33(1):17-21. [8] 苏慧君, 蔡丹, 张洁, 等. 强抑制性三甲基硅烷基葡萄糖苷的合成及其防膨性研究[J]. 复杂油气藏, 2014, 6:61-64. SU Huijun, CAI Dan, ZHANG Jie. Synthesis and antiswelling property of trimethylsilyl glucoside with high inhabitability[J]. Complex Hydrocarbon Reservoirs, 2014, 6:61-64. [9] 陈刚, 蔡丹, 张洁, 等. 羧酸多胺盐型黏土膨胀抑制剂制备与性能研究[J]. 天然气与石油, 2014, 32(2):68-72.CHEN Gang, CAI Dan, ZHANG Jie. Preparation and performance study of carboxylic acid amine salt type clay swelling inhibitor[J]. Natural Gas and Oil, 2014, 32(2):68-72. [10] Villabona-Estupiñán S, Rodrigues J D A, Nascimento R S V. Understanding the clay-PEG(and hydrophobic derivatives) interactions and their effect on clay hydration and dispersion:A comparative study[J]. Applied Clay Science, 2017, 143:89-100. [11] 刘敬平,孙金声.川滇页岩气水平井水基钻井液技术[J]. 钻井液与完井液, 2017, 34(2):9-14.LIU Jingping, SUN Jinsheng.Water base drilling fluid technology for horizontal shale gas drilling in Sichuan and Yunnan[J].Drilling Fluid & Completion Fluid, 2017, 34(2):9-14. [12] Weng J, Gong Z, Liao L, et al. Comparison of organosepiolite modified by different surfactants and their rheological behavior in oil-based drilling fluids[J]. Applied Clay Science, 2018. [13] Zhuang G, Zhang Z, Yang H, et al. Structures and rheological properties of organo-sepiolite in oil-based drilling fluids[J].Applied Clay Science, 2018, 154:43-51. [14] 艾军, 张金成, 臧艳彬, 等. 涪陵页岩气田钻井关键技术[J]. 石油钻探技术, 2014, 42(5):9-15.Ai Jun, Zhang Jin cheng, Zang Yanbin, et al. The key drilling technoloies in fuling shale gas field[J].Petroleum Drilling Technique, 2014, 42(5):9-15.
点击查看大图
计量
- 文章访问数: 676
- HTML全文浏览量: 197
- PDF下载量: 206
- 被引次数: 0