玉东7-4-2井钻井液技术优化及应用
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摘要
针对塔北玉东区块上部地层缩径阻卡、膏盐岩层蠕变缩径和垮塌卡钻、高密度盐水钻井液流变性及滤失量控制难等一系列问题,玉东7-4-2井通过对钻井液技术的优化,解决了阻卡和膏盐层井眼稳定等问题,易塌层段井径扩大率仅为7.5%,钻井周期比邻井节约20 d以上,提速效果显著。
Drilling operations in the Block Yudong in north Tarim Basin have long been faced with a series of problems, such as tight hole in the upper formations which results in drag and overpull, creeping of salt/gypsum sections which results in tight spots, sloughing and pipe sticking, and difficulties in controlling rheology and filtration of the drilling fluid because of high mud weight. By optimizing the drilling fluid technology on the well Yudong-7-4-2, drag, overpull and borehole wall instability have all been resolved. Percent hole washout in easy-to-collapse sections was only 7.5%. Drilling time was 20 days less than wells drilled nearby, indicating the ROP was greatly increased.
Drilling operations in the Block Yudong in north Tarim Basin have long been faced with a series of problems, such as tight hole in the upper formations which results in drag and overpull, creeping of salt/gypsum sections which results in tight spots, sloughing and pipe sticking, and difficulties in controlling rheology and filtration of the drilling fluid because of high mud weight. By optimizing the drilling fluid technology on the well Yudong-7-4-2, drag, overpull and borehole wall instability have all been resolved. Percent hole washout in easy-to-collapse sections was only 7.5%. Drilling time was 20 days less than wells drilled nearby, indicating the ROP was greatly increased.
引文
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[3]朱怀江,赵常青,罗健辉,等.聚合物水化分子的微观结构研究[J].电子显微学报,2005,24(3):205-209ZHU Huaijiang,ZHAO Changqing,LUO Jianhui,et al.Sutdy in the microstructure of polymer molecule hydrate[J].Journal of Chinese Electron Microscopy Society,2005,24(3):205-209.
[4]李万青,于建,蔡恩宏,等.强抑制性聚合醇防塌钻井液在大安地区的应用[J].钻井液与完井液,2006,23(3):77-78.LI Wanging,YU Jian,CAI Enhong,et al.Application of inhibitive polyglycol drilling fluid in Da’an area[J].Drilling Fluid&Completion Fluid,2006,23(3):77-78.
[5]石秉忠,胡旭辉,高书阳,等.硬脆性泥页岩微裂缝封堵可视化模拟试验与评价[J].石油钻探技术,2014(3):32-37.SHI Bingzhou,HU Xuhui,GAO Shuyang,et al.Visualization sealing simulation test and evaluation of hard brittle shale microfracture[J].Petroleum Drilling Techniques,2014(3):32-37.
[6]鄢捷年,罗平亚.抗高温抗盐失水控制剂-磺甲基酚醛树脂(SMP)作用机理的研究[J].石油钻采工艺,1982,(2):81-83.YAN Jienian,LUO Pingya.Study on mechanisms of heat and salinity tolerance fluid loss agent--SMP[J].Oil Drilling&Production Technology,1982,(2):81-83.
[7]朱宽亮,王富华,徐同台,等.抗高温水基钻井液技术研究与应用现状及发展趋势(Ⅱ)[J].钻井液与完井液,2009,26(6):56-64.ZHU Kuanliang,WANG Fuhua,XU Tongtai,et al.Status in quo and progress(Ⅱ):study and application of high temperature drilling fluids[J].Drilling Fluid&Completion Fluid,2009,26(6):56-64.
[8]黄维安,邱正松,曹杰,等.钻井液用超高温抗盐聚合物降滤失剂的研制与评价[J].油田化学,2012,29(2):133-137.HUANG Weian,QIU Zhengsong,CAO Jie,et al.Development and evaluation of anti ultra-high temperature and salt tolerant polymeric filtrate loss reducer[J].Oilfield and Chemistry,2012,29(2):133-137.
[9]赵忠举,徐同台.国外钻井液新技术[J]钻井液与完井液,2000,17(2):32-36.ZHAO Zhongju,XU Tongtai.New drilling fluid technology abroad[J].Drilling Fluid&Completion Fluid,2000,17(2):32-36.
[10]田野,张敬畅,左凤江,等.乳化石蜡的研制与评价[J]钻井液与完井液,2008,25(4):29-30.TIAN Ye,ZHANG Jingchang,ZUO Fengjiang,et al.The laboratory preparation and evaluation of a emulsified wax[J].Drilling Fluid&Completion Fluid,2008,25(4):29-30.