抗高温油基钻井液封堵剂PF-MOSHIELD的研制与应用
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摘要
针对层理和微裂缝发育的高温高压复杂井,从提高多尺度封堵效果和高温稳定性出发,研制了一种由独特的化学改性剂和磺化沥青、油溶性碳酸钙、纳米二氧化硅以及苯乙烯丙烯酸酯共聚物等组成的抗高温油基钻井液封堵剂PF-MOSHIELD。该封堵剂粒径分布在1～189.02μm之间,热稳定性好,分解温度高达378℃,软化点为260℃,且能在油相中稳定分散。与传统的油基封堵剂相比,该封堵剂在压差的作用下挤入微裂缝,同时参与了"内滤饼"和"外滤饼"的形成,在高温下能对不同孔隙度的裂缝进行封堵,有效降低渗透滤失量和滤失速率。在南海海域WZ6-9、WZ12-1等区块井的应用表明,添加PF-MOSHIELD的钻井液体系流变稳定,电稳定性提高,减少页岩中孔隙压力传递效应,能够满足层理和微裂缝发育的硬脆性和破碎性地层井壁稳定要求。
PF-MOSHIELD, a high temperature plugging agent, has been developed for use in oil base drilling fluids to enhance the efficiency of plugging fractures with wide size distribution at elevated temperatures in drilling high temperature high pressure wells complicated with developed beddings and microfractures. PF-MOSHIELD is made from a unique chemical modifier, sulfonated asphalt, acid soluble calcium carbonate, nanophase silica and styrene acrylate. PF-MOSHIELD, with its particle sizes distributed in the range of 1-189.02 μm, has good thermal stability; the decomposition temperature of PF-MOSHIELD is 378 ℃, and the softening point is 260 ℃. PF-MOSHIELD is dispersible in oil. Compared with conventional plugging agents for oil base drilling fluids, PFMOSHIELD can be squeezed into microfractures under pressure, taking part in the buildup of both the "inner filter cake" and the"surface mud cake". PF-MOSHIELD can, at high temperatures, plug fractures of different porosities, effectively reducing the amount of filtrate and the rate of filtration. Field application of PF-MOSHIELD on wells drilled in the Block WZ6-9 and Block WZ12-1 showed that drilling fluids treated with PF-MOSHIELD had stable rheology and enhanced electric stability, and pressure transferring in the pores in shale formations was weakened, all satisfying the needs of borehole wall stabilization in drilling hard brittle and fractured formations developed with beddings and microfractures.
PF-MOSHIELD, a high temperature plugging agent, has been developed for use in oil base drilling fluids to enhance the efficiency of plugging fractures with wide size distribution at elevated temperatures in drilling high temperature high pressure wells complicated with developed beddings and microfractures. PF-MOSHIELD is made from a unique chemical modifier, sulfonated asphalt, acid soluble calcium carbonate, nanophase silica and styrene acrylate. PF-MOSHIELD, with its particle sizes distributed in the range of 1-189.02 μm, has good thermal stability; the decomposition temperature of PF-MOSHIELD is 378 ℃, and the softening point is 260 ℃. PF-MOSHIELD is dispersible in oil. Compared with conventional plugging agents for oil base drilling fluids, PFMOSHIELD can be squeezed into microfractures under pressure, taking part in the buildup of both the "inner filter cake" and the"surface mud cake". PF-MOSHIELD can, at high temperatures, plug fractures of different porosities, effectively reducing the amount of filtrate and the rate of filtration. Field application of PF-MOSHIELD on wells drilled in the Block WZ6-9 and Block WZ12-1 showed that drilling fluids treated with PF-MOSHIELD had stable rheology and enhanced electric stability, and pressure transferring in the pores in shale formations was weakened, all satisfying the needs of borehole wall stabilization in drilling hard brittle and fractured formations developed with beddings and microfractures.
引文
[1]龙鹏宇,张金川,唐玄,等.泥页岩裂缝发育特征及其对页岩气勘探和开发的影响[J].天然气地球科学,2011,22(3):525-532.LONG Pengyu,ZHANG Jinchuan,TAN Xuan,et al.Feature of muddy shale fissure and its effects for shale gas exploration and development[J].Natural Gas Geoscience,2011,22(3):525-532.
[2]SINHA B,BRATTON T,CRYER J,et al.Nearwellbore alteration and formation stress parameters using borehole sonic data[R].SPE 95841,2005.
[3]GUO J,VONCKEN J,OPSTAL T,et al.Investigation of the mitigation of lost circulation in oil-based drilling fluids using additives[R].SPE 151751,2012.
[4]GUO QUANXIN,JI LUJUN,RAJABOV VUSAL,et al.Marcellus and haynesville drilling data:analysis and lesson learned[R].SPE 158894,2012.
[5]WANG H,SWEATMAN R,ENGELMAN B.The key to successfully applying today’s lost circulation solutions[R].SPE 95895,2005.
[6]张凡,许明标.一种油基膨胀封堵剂的合成及其性能评价[J].长江大学学报自然科学版:理工卷,2010(3):507-509.ZHANG Fan,XU Mingbiao.Synthesis and performance evaluation of a swelling blocking agent for oil based mud[J].Journal of Yangtze University(Nat Sci Edit),2010(3):507-509.
[7]胡文军,刘庆华,卢建林,等.强封堵油基钻井液体系在W11-4D油田的应用[J].钻井液与完井液,2007,24(3):12-15.HU Wenjun,LIU Qinghua,LU Jianlin,et al.Application of an oil base mud in W11-4D oil field[J].Drilling Fluid&Completion Fluid,2007,24(3):12-15.
[8]王建华,李建男,闫丽丽,等.油基钻井液用纳米聚合物封堵剂的研制[J].钻井液与完井液,2013(6):5-8.WANG Jianhua,LI Jiannan,YAN Lili,et al.The development and performance evaluation of plungging agent for oil-base drilling fluids[J].Drilling Fluid&Completion Fluid,2013,30(6):5-8.
[9]DONALD L,WHITFILL,HEMPHILL T.All lostcirculation materials and systems are not created equal[R].SPE 84319,2003.
[10]罗米娜,艾加伟,陈馥,等油基钻井液用纳米材料CQ-NZC的封堵性能评价[J].化工进展,2015,34(5):1395-1400.LUO Mina,AI Jiawei,CHEN Fu,et al.Evaluation of sealing characteristics of nano materials CQ-NZCin oil based drilling fluids[J].Chemical Industry and Engineering Progress,2015,34(5):1395-1400.
[11]SAMUEL M,MARCINEW R,SAMUEL E,et al.A new solids-free non-damaging high temperature lost-circulation pill:development and first field applications[R].SPE 81494,2003.
[12]张行云,郭磊,张兴来,等.活度平衡高效封堵钻井液的研究及应用[J].钻采工艺,2014,37(1):84-87.ZHANG Xingyun,GUO Lei,ZHANG Xinglai,et al.Research and application of activity balance plugging drilling fluid[J].Drilling&Production Technology,2014,37(1):84-87.
[13]GUICHARD B,VALENTI A,ELIOKEN,et al.An organosoluble polymer for outstanding fluid-loss control with minimum damage[R].SPE 107281,2007.
[14]CONTRERAS O,HARELAND G,HUSEIN M,et al.Application of in-house prepared nanoparticles as filtration control addtive to reduce formation damage[R].SPE 168116,2014
[15]匡绪兵.具核结构的油基钻井液封堵剂的研制[J].钻井液与完井液,2015,32(5):15-18.KUANG Xubing.Development and evaluation of oil base mud plugging agent with nuclei[J].Drilling Fluid&Completion Fluid,2015,32(5):15-18.
[16]AL-MUHAILAN M,RAJAGOPALAN A,AL-SHAYJI,et al.Successful application of customized fluid using specialized synthetic polymer in high pressured wells to mitigate differential stikcing problems by minimizing pore pressure transmission[R].IPTC-17913-MS,2014.
[2]SINHA B,BRATTON T,CRYER J,et al.Nearwellbore alteration and formation stress parameters using borehole sonic data[R].SPE 95841,2005.
[3]GUO J,VONCKEN J,OPSTAL T,et al.Investigation of the mitigation of lost circulation in oil-based drilling fluids using additives[R].SPE 151751,2012.
[4]GUO QUANXIN,JI LUJUN,RAJABOV VUSAL,et al.Marcellus and haynesville drilling data:analysis and lesson learned[R].SPE 158894,2012.
[5]WANG H,SWEATMAN R,ENGELMAN B.The key to successfully applying today’s lost circulation solutions[R].SPE 95895,2005.
[6]张凡,许明标.一种油基膨胀封堵剂的合成及其性能评价[J].长江大学学报自然科学版:理工卷,2010(3):507-509.ZHANG Fan,XU Mingbiao.Synthesis and performance evaluation of a swelling blocking agent for oil based mud[J].Journal of Yangtze University(Nat Sci Edit),2010(3):507-509.
[7]胡文军,刘庆华,卢建林,等.强封堵油基钻井液体系在W11-4D油田的应用[J].钻井液与完井液,2007,24(3):12-15.HU Wenjun,LIU Qinghua,LU Jianlin,et al.Application of an oil base mud in W11-4D oil field[J].Drilling Fluid&Completion Fluid,2007,24(3):12-15.
[8]王建华,李建男,闫丽丽,等.油基钻井液用纳米聚合物封堵剂的研制[J].钻井液与完井液,2013(6):5-8.WANG Jianhua,LI Jiannan,YAN Lili,et al.The development and performance evaluation of plungging agent for oil-base drilling fluids[J].Drilling Fluid&Completion Fluid,2013,30(6):5-8.
[9]DONALD L,WHITFILL,HEMPHILL T.All lostcirculation materials and systems are not created equal[R].SPE 84319,2003.
[10]罗米娜,艾加伟,陈馥,等油基钻井液用纳米材料CQ-NZC的封堵性能评价[J].化工进展,2015,34(5):1395-1400.LUO Mina,AI Jiawei,CHEN Fu,et al.Evaluation of sealing characteristics of nano materials CQ-NZCin oil based drilling fluids[J].Chemical Industry and Engineering Progress,2015,34(5):1395-1400.
[11]SAMUEL M,MARCINEW R,SAMUEL E,et al.A new solids-free non-damaging high temperature lost-circulation pill:development and first field applications[R].SPE 81494,2003.
[12]张行云,郭磊,张兴来,等.活度平衡高效封堵钻井液的研究及应用[J].钻采工艺,2014,37(1):84-87.ZHANG Xingyun,GUO Lei,ZHANG Xinglai,et al.Research and application of activity balance plugging drilling fluid[J].Drilling&Production Technology,2014,37(1):84-87.
[13]GUICHARD B,VALENTI A,ELIOKEN,et al.An organosoluble polymer for outstanding fluid-loss control with minimum damage[R].SPE 107281,2007.
[14]CONTRERAS O,HARELAND G,HUSEIN M,et al.Application of in-house prepared nanoparticles as filtration control addtive to reduce formation damage[R].SPE 168116,2014
[15]匡绪兵.具核结构的油基钻井液封堵剂的研制[J].钻井液与完井液,2015,32(5):15-18.KUANG Xubing.Development and evaluation of oil base mud plugging agent with nuclei[J].Drilling Fluid&Completion Fluid,2015,32(5):15-18.
[16]AL-MUHAILAN M,RAJAGOPALAN A,AL-SHAYJI,et al.Successful application of customized fluid using specialized synthetic polymer in high pressured wells to mitigate differential stikcing problems by minimizing pore pressure transmission[R].IPTC-17913-MS,2014.