东方1-1气田浅层大位移水平井钻井液优化与实践
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摘要
东方1-1气田在垂深为1 350 m左右的大位移水平井钻井过程中,表层乐东组、莺歌海组一段地层极易出泥球;水平段储层莺歌海组二段钻进摩阻扭矩大,且存在压力衰竭,极易发生井漏;储层埋深浅,地层成岩性差,井壁易失稳。针对以上钻井难题,经过多年摸索与实践,在非储层段改变以往钻井液作业模式,探索性地使用海水聚合物体系,保证非储层段泥岩充分水化;在储层段引入纳米可变形封堵剂PF-Greenseal优化无固相钻井液屏蔽暂堵性能,同时配合使用成膜封堵剂PF-LPF及高效润滑剂PF-Greenlube,成功解决了泥球、井漏、摩阻扭矩大、井壁失稳等难题,形成了一套东方1-1气田浅层大位移水平井钻井液作业模式。现场3口调整井应用结果表明,非储层段钻进机械钻速由41~64 m/h提高到85 m/h左右,同时可降低50%钻井液成本;储层段井壁稳定,井径扩大率低于3%,扭矩低,储层保护效果好,3口井测试表皮因数接近0。研究结果可为类似油气田钻井作业提供钻井液技术参考。
When the extended-reach horizontal well with vertical depth of 1 350 m is drilled in Dongfang 1-1 Gasfield,mud balls tend to occur in the surface layer(i.e.,Ledong Formation and Yinggehai Formation).During the drilling of the horizontal section in the second Member of Yinggehai Formation,the torque and drag is high and the pressure is depleted,so the mud is lost very easily.Besides,the reservoir is shallow with poor diagenetic property,so the borehole tends to be instable.To deal with these drilling difficulties,a series of exploration and practice have been conducted for many years.The previous operation mode of drilling fluid in non-reservoir intervals is transformed and sea-water polymer system is exploratorily used to ensure the sufficient hydration of mudstone in non-reservoir intervals.Nano-scale deformable blocking agent PF-Greenseal is introduced into reservoirs to optimize the shielding-temporary blocking property of solid free drilling fluids,and combined with film blocking agent PF-LPF and efficient lubricant PF-Greenlube,the following drilling difficulties are solved successfully,such as mud ball,circulation loss,high torque and drag and borehole instability,and a set of drilling fluid operation mode for the shallow extended-reach horizontal well in Dongfang 1-1 Gasfield is established.This operation model is applied on site in 3 adjustment wells.It is shown that the rate of penetration(ROP) in non-reservoir intervals increases to 85 m/h from 41-64 m/h,and the cost of drilling fluid is reduced by 50%.Furthermore,the borehole in reservoirs is stable with hole enlargement ratio less than 3% and low torque.In addition,reservoir protection effect is good and the skin factor of the three wells is close to 0.The research results can be used as the technical reference of drilling fluid for the drilling operation in similar oil and gas fields.
When the extended-reach horizontal well with vertical depth of 1 350 m is drilled in Dongfang 1-1 Gasfield,mud balls tend to occur in the surface layer(i.e.,Ledong Formation and Yinggehai Formation).During the drilling of the horizontal section in the second Member of Yinggehai Formation,the torque and drag is high and the pressure is depleted,so the mud is lost very easily.Besides,the reservoir is shallow with poor diagenetic property,so the borehole tends to be instable.To deal with these drilling difficulties,a series of exploration and practice have been conducted for many years.The previous operation mode of drilling fluid in non-reservoir intervals is transformed and sea-water polymer system is exploratorily used to ensure the sufficient hydration of mudstone in non-reservoir intervals.Nano-scale deformable blocking agent PF-Greenseal is introduced into reservoirs to optimize the shielding-temporary blocking property of solid free drilling fluids,and combined with film blocking agent PF-LPF and efficient lubricant PF-Greenlube,the following drilling difficulties are solved successfully,such as mud ball,circulation loss,high torque and drag and borehole instability,and a set of drilling fluid operation mode for the shallow extended-reach horizontal well in Dongfang 1-1 Gasfield is established.This operation model is applied on site in 3 adjustment wells.It is shown that the rate of penetration(ROP) in non-reservoir intervals increases to 85 m/h from 41-64 m/h,and the cost of drilling fluid is reduced by 50%.Furthermore,the borehole in reservoirs is stable with hole enlargement ratio less than 3% and low torque.In addition,reservoir protection effect is good and the skin factor of the three wells is close to 0.The research results can be used as the technical reference of drilling fluid for the drilling operation in similar oil and gas fields.
引文
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[9]李洪,邹灵战,汪海阁,刘颖彪,章敬,罗洪.玛湖致密砂砾岩2000m水平段水平井优快钻完井技术[J].石油钻采工艺,2017,39(1):47-52.LI Hong,ZOU Lingzhan,WANG Haige,LIU Yingbiao,ZHANG Jing,LUO Hong.High-quality fast drilling and completion technologies for horizontal wells with horizontal section of 2 000 m long in Mahu tight glutenites[J].Oil Drilling&Production Technology,2017,39(1):47-52.
[10]耿学礼,苏延辉,郑晓斌,高波.无固相保护煤层钻井液研究及应用[J].石油钻采工艺,2017,39(4):455-459.GENG Xueli,SU Yanhui,ZHENG Xiaobin,GAO Bo.Study and application of solid-free coalbed protection drilling fluid[J].Oil Drilling&Production Technology,2017,39(4):455-459.
[11]李文明,向刚,王安泰,刘湘华,刘相兴.苏里格气田大位移水平井钻井液技术[J].石油钻采工艺,2012,34(3):33-35.LI Wenming,XIANG Gang,WANG Antai,LIU Xianghua,LIU Xiangxing.Drilling fluid techniques for extended reach horizontal wells in Sulige gas field[J].Oil Drilling&Production Technology,2012,34(3):33-35.
[12]鄢捷年,杨虎,王利国.南海流花大位移井水基钻井液技术[J].石油钻采工艺,2006,28(1):23-28.YAN Jienian,YANG Hu,WANG Liguo.Technology of water based drilling fluids used in extended reach wells at Liuhua Field[J].Oil Drilling&Production Technology,2006,28(1):23-28.
[13]周延军,曾强渗,窦玉玲,姜兰其.金平1浅层大位移水平井钻井工程设计技术及应用[J].钻采工艺,2008,31(增刊):24-27.ZHOU Yanjun,ZENG Qiangshen,DOU Yuling,JIANG Lanqi.Drilling design and application for shallow extended reach horizontal well in Jinping well 1[J].Drilling&Production Technology,2008,31(S1):24-27.
[14]褚奇,李涛,王栋,胡雪峰,付强,殷拥军,杨军.龙凤山气田强抑制封堵型防塌钻井液技术[J].钻井液与完井液,2016,33(5):35-40.CHU Qi,LI Tao,WANG Dong,HU Xuefeng,FU Qiang,YIN Yongjun,YANG Jun.Plugging inhibitive drilling fluid used in Longfengshan Gas Field[J].Drilling Fluid&Completion Fluid,2016,33(5):35-40.
[15]程智,仇盛南,曹靖瑜,李海彪,徐兴军,巩晓璠.长裸眼随钻防漏封堵技术在跃满3-3井的应用[J].石油钻采工艺,2016,38(5):612-616.CHEN Zhi,QIU Shengnan,CAO Jingyu,LI Haibiao,XU Xingjun,GONG Xiaopan.Application of pluggingwhile-drilling technology in long open-hole interval of the Well Yueman-3-3[J].Oil Drilling&Production Technology,2016,38(5):612-616.
[16]王中华.国内钻井液处理剂研发现状与发展趋势[J].石油钻探技术,2016,44(3):1-8.WANG Zhonghua.Present status and trends in research and development of drilling fluid additives in China[J].Petroleum Drilling Techniques,2016,44(3):1-8.
[17]艾贵成.封堵成膜钻井液技术在昆2井的应用[J].石油钻采工艺,2007,29(1):89-91.AI Guicheng.Application of plugging and film forming drilling fluid technology in Kun-2 well[J].Oil Drilling&Production Technology,2007,29(1):89-91.
[18]张坤,刘南清,王强,王磊磊,龚纯武,郭剑梅.强抑制封堵钻井液体系研究及应用[J].石油钻采工艺,2017,39(5):580-583.ZHANG Kun,LIU Nanqing,WANG Qiang,WANG Leilei,GONG Chunwu,GUO Jianmei.Research and application of drilling fluid with strong inhibition and sealing capacity[J].Oil Drilling&Production Technology,2017,39(5):580-583.
[2]刘海水,王超,魏子路,钟超.钻井过程中泥球形成的影响因素探讨[J].化学与生物工程,2011,28(8):70-73.LIU Haishui,WANG Chao,WEI Zilu,ZHONG Chao.Study on influential factors of gumbo ball formation during drilling process[J].Chemistry&Bioengineering,2011,28(8):70-73.
[3]闫传梁,邓金根,蔚宝华,谭强,邓福成,胡连波.压力衰竭储层井壁稳定性变化规律研究[J].石油钻采工艺,2013,35(3):5-8.YAN Chuanliang,DENG Jin’gen,YU Baohua,TAN Qiang,DENG Fucheng,HU Lianbo.Research on wellbore stability of pressure depleted reservoirs[J].Oil Drilling&Production Technology,2013,35(3):5-8.
[4]赵建,李晶,王国震,彭芳亮,魏超,王滨.压力衰竭砂岩地层井漏机理及控制技术[J].录井工程,2015,26(1):26-30.ZHAO Jian,LI Jing,WANG Guozhen,PENG Fangliang,WEI Chao,WANG Bin.Lost circulation mechanism and control technique for sandstone formation with pressure depletion[J].Mud Logging Engineering,2015,26(1):26-30.
[5]崔应中,徐一龙,黄凯文,陈洪,王荐,舒福昌,向兴金.东方1-1气田水基钻井液技术优化[J].钻井液与完井液,2016,33(4):65-68.CUI Yingzhong,XU Yilong,HUANG Kaiwen,CHEN Hong,WANG Jian,SHU Fuchang,XIANG Xingjin.Optimization of water based drilling fluid technology for Dongfang1-1 Gas Field[J].Drilling Fluid&Completion Fluid,2016,33(4):65-68.
[6]程玉生,杨洪烈,胡文军,卜继勇,向雄.乐东22-1气田超浅层大位移井钻井液技术[J].石油天然气学报,2014,36(12):146-148.CHENG Yusheng,YANG Honglie,HU Wenjun,BU Jiyong,XIANG Xiong.Ultra-shallow extended reach well drilling fluid technology in Ledong 22-1 gas field[J].Journal of Oil and Gas Technology,2014,36(12):146-148.
[7]车伟林,张立权,杨洪烈,莫天明,黄美科.南海西部浅层大位移井钻井液技术[J].广东化工,2014,41(22):45-46.CHE Weilin,ZHANG Liquan,YANG Honglie,MO Tianming,HUANG Meike.The technology of shallow highly-displacement well drilling fluid in the South China Sea[J].Guangdong Chemical Industry,2014,41(22):45-46.
[8]张岩,向兴金,鄢捷年,吴彬,舒福昌.快速钻井中泥球形成的影响因素与控制措施[J].中国海上油气,2011,23(5):335-339.ZHANG Yan,XIANG Xingjin,YAN Jienian,WU Bin,SHU Fuchang.Influence factors and controlling measures on formation of gumbo balls during fast drilling[J].China Offshore Oil and Gas,2011,23(5):335-339.
[9]李洪,邹灵战,汪海阁,刘颖彪,章敬,罗洪.玛湖致密砂砾岩2000m水平段水平井优快钻完井技术[J].石油钻采工艺,2017,39(1):47-52.LI Hong,ZOU Lingzhan,WANG Haige,LIU Yingbiao,ZHANG Jing,LUO Hong.High-quality fast drilling and completion technologies for horizontal wells with horizontal section of 2 000 m long in Mahu tight glutenites[J].Oil Drilling&Production Technology,2017,39(1):47-52.
[10]耿学礼,苏延辉,郑晓斌,高波.无固相保护煤层钻井液研究及应用[J].石油钻采工艺,2017,39(4):455-459.GENG Xueli,SU Yanhui,ZHENG Xiaobin,GAO Bo.Study and application of solid-free coalbed protection drilling fluid[J].Oil Drilling&Production Technology,2017,39(4):455-459.
[11]李文明,向刚,王安泰,刘湘华,刘相兴.苏里格气田大位移水平井钻井液技术[J].石油钻采工艺,2012,34(3):33-35.LI Wenming,XIANG Gang,WANG Antai,LIU Xianghua,LIU Xiangxing.Drilling fluid techniques for extended reach horizontal wells in Sulige gas field[J].Oil Drilling&Production Technology,2012,34(3):33-35.
[12]鄢捷年,杨虎,王利国.南海流花大位移井水基钻井液技术[J].石油钻采工艺,2006,28(1):23-28.YAN Jienian,YANG Hu,WANG Liguo.Technology of water based drilling fluids used in extended reach wells at Liuhua Field[J].Oil Drilling&Production Technology,2006,28(1):23-28.
[13]周延军,曾强渗,窦玉玲,姜兰其.金平1浅层大位移水平井钻井工程设计技术及应用[J].钻采工艺,2008,31(增刊):24-27.ZHOU Yanjun,ZENG Qiangshen,DOU Yuling,JIANG Lanqi.Drilling design and application for shallow extended reach horizontal well in Jinping well 1[J].Drilling&Production Technology,2008,31(S1):24-27.
[14]褚奇,李涛,王栋,胡雪峰,付强,殷拥军,杨军.龙凤山气田强抑制封堵型防塌钻井液技术[J].钻井液与完井液,2016,33(5):35-40.CHU Qi,LI Tao,WANG Dong,HU Xuefeng,FU Qiang,YIN Yongjun,YANG Jun.Plugging inhibitive drilling fluid used in Longfengshan Gas Field[J].Drilling Fluid&Completion Fluid,2016,33(5):35-40.
[15]程智,仇盛南,曹靖瑜,李海彪,徐兴军,巩晓璠.长裸眼随钻防漏封堵技术在跃满3-3井的应用[J].石油钻采工艺,2016,38(5):612-616.CHEN Zhi,QIU Shengnan,CAO Jingyu,LI Haibiao,XU Xingjun,GONG Xiaopan.Application of pluggingwhile-drilling technology in long open-hole interval of the Well Yueman-3-3[J].Oil Drilling&Production Technology,2016,38(5):612-616.
[16]王中华.国内钻井液处理剂研发现状与发展趋势[J].石油钻探技术,2016,44(3):1-8.WANG Zhonghua.Present status and trends in research and development of drilling fluid additives in China[J].Petroleum Drilling Techniques,2016,44(3):1-8.
[17]艾贵成.封堵成膜钻井液技术在昆2井的应用[J].石油钻采工艺,2007,29(1):89-91.AI Guicheng.Application of plugging and film forming drilling fluid technology in Kun-2 well[J].Oil Drilling&Production Technology,2007,29(1):89-91.
[18]张坤,刘南清,王强,王磊磊,龚纯武,郭剑梅.强抑制封堵钻井液体系研究及应用[J].石油钻采工艺,2017,39(5):580-583.ZHANG Kun,LIU Nanqing,WANG Qiang,WANG Leilei,GONG Chunwu,GUO Jianmei.Research and application of drilling fluid with strong inhibition and sealing capacity[J].Oil Drilling&Production Technology,2017,39(5):580-583.