协同转向酸化技术在让纳若尔油田的应用
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摘要
让纳若尔油田射孔跨度大,射孔段数多,层间差异大,产液剖面不均匀,为了提高均匀酸化程度,改善产液剖面,增加低渗层动用程度,进行了具有暂堵转向、选择性酸化性能的多种酸液体系研究。根据油田储层岩性和物性特征,确定了与储层配伍性较好且具有暂堵、转向、低伤害、深度酸化功能的3种酸液体系,并对其性能进行了室内测试。同时,为了充分发挥各种酸液体系的优势,使其达到协同作用的目的,使用了清洁自转向—泡沫复合酸化技术和清洁自转向酸—乳化复合酸化技术。现场应用表明,施工成功率高,增产效果明显,具有较好的应用前景。
In Zanazour oilfield,wells feature long perforation interval,multiple perforation stages,large difference between layers and uneven production profile.In order to acidize uniformly,improve oil production profile and increase the producing degree of low permeability layers,selective acid systems,which can temporary block high-permeability layers and divert acid to low-permeability layers,have been researched and used in Kazakhstan Zanazour oilfield carbonate reservoirs.First,according to the reservoir,lithology and physical properties of this oilfield,three acid systems were chosen as the main acid,which have better blocking,diversion and low damage and good compatibility with the reservoir.Besides,their performances have been evaluated by experimental tests.Furthermore,selective foam acidizing and self diverting-emulsified acid system were utilized to achieve synergy diverting and better uniformity of acidizing,speed up flowing back rate and increase acidizing penetration depth.Field application results show that the technology can increase production significantly,and have a promising application prospect in this field.
In Zanazour oilfield,wells feature long perforation interval,multiple perforation stages,large difference between layers and uneven production profile.In order to acidize uniformly,improve oil production profile and increase the producing degree of low permeability layers,selective acid systems,which can temporary block high-permeability layers and divert acid to low-permeability layers,have been researched and used in Kazakhstan Zanazour oilfield carbonate reservoirs.First,according to the reservoir,lithology and physical properties of this oilfield,three acid systems were chosen as the main acid,which have better blocking,diversion and low damage and good compatibility with the reservoir.Besides,their performances have been evaluated by experimental tests.Furthermore,selective foam acidizing and self diverting-emulsified acid system were utilized to achieve synergy diverting and better uniformity of acidizing,speed up flowing back rate and increase acidizing penetration depth.Field application results show that the technology can increase production significantly,and have a promising application prospect in this field.
引文
[1]何春明,陈红军,王文耀.碳酸盐岩储层转向酸化技术现状与最新进展[J].石油钻探技术,2009,37(5):121-126.
[2]贾新峰,李建丽.转向酸化技术综述[J].内蒙古石油化工,2008,7(22):79-82.
[3]CHANG F,QU QI,FRENIER W.A novel self-divertingacid developed for matrix simulation of carbonate reservoirs[R].SPE 65033,2001.
[4]LUNGWITZ B,FREDD C,BRADY M,et al.Diversion and cleanup studies of viscoelastic surfactant-based selfdiverting acid[R].SPE 86504,2004.
[5]艾昆,李谦定,袁志平,等.清洁转向酸酸压技术在塔河油田的应用[J].石油钻采工艺,2008,30(4):71-74.
[6]赵立强,邹洪岚,黄开林.暂堵酸化工艺技术及其应用[J].天然气工业,1998,18(2):49-52.
[7]杨怀国,刘法杰,王燕娜,等.油井化学堵水工艺技术新进展[J].油气田地面工程,2009,28(5):29-30.
[8]徐永辉.泡沫酸特性研究及其应用[D].北京:中国石油大学,2007.
[9]李宾飞,李兆敏,徐永辉,等.泡沫酸酸化技术及其在气井酸化中的应用[J].天然气工业,2006,26(12):130-132.
[10]张绍东,徐永辉,李兆敏,等.泡沫酸配方室内试验研究[J].钻采工艺,2006,29(5):99-101.
[11]刘炜,熊楠,吴志鹏,等.缓速酸种类及乳化酸应用研究进展[J].精细石油化工进展,2010,11(9):12-15,18.
[12]陈红军,郭建春,赵金洲,等.W/O乳化酸体系稳定性实验研究[J].石油与天然气化工,2005,34(2):118-121.
[13]M A BUIJSE.Novel application of emulsified acids to matrix stimulation of heterogeneous formations[R].SPE 65355,2000.
[14]NASR-EL-DIN HA.Stimulation of water-dispodal wells using acid-in-diesel emulsions:case histories[R].SPE65069,2000.
[15]MICHAEL W CONWAY.A comparative study of straight/gelled/emulsified hydrochloric acid diffusivity coefficient using diaphragm cell and rotating disk[R].SPE 65386,1999.
[16]JACK D LYNN.A core based comparison of the reaction characteristics if emulsified and in-situ gelled acids in low permeability,high temperature,gas bearing carbonates[R].SPE 65386,2001.
[2]贾新峰,李建丽.转向酸化技术综述[J].内蒙古石油化工,2008,7(22):79-82.
[3]CHANG F,QU QI,FRENIER W.A novel self-divertingacid developed for matrix simulation of carbonate reservoirs[R].SPE 65033,2001.
[4]LUNGWITZ B,FREDD C,BRADY M,et al.Diversion and cleanup studies of viscoelastic surfactant-based selfdiverting acid[R].SPE 86504,2004.
[5]艾昆,李谦定,袁志平,等.清洁转向酸酸压技术在塔河油田的应用[J].石油钻采工艺,2008,30(4):71-74.
[6]赵立强,邹洪岚,黄开林.暂堵酸化工艺技术及其应用[J].天然气工业,1998,18(2):49-52.
[7]杨怀国,刘法杰,王燕娜,等.油井化学堵水工艺技术新进展[J].油气田地面工程,2009,28(5):29-30.
[8]徐永辉.泡沫酸特性研究及其应用[D].北京:中国石油大学,2007.
[9]李宾飞,李兆敏,徐永辉,等.泡沫酸酸化技术及其在气井酸化中的应用[J].天然气工业,2006,26(12):130-132.
[10]张绍东,徐永辉,李兆敏,等.泡沫酸配方室内试验研究[J].钻采工艺,2006,29(5):99-101.
[11]刘炜,熊楠,吴志鹏,等.缓速酸种类及乳化酸应用研究进展[J].精细石油化工进展,2010,11(9):12-15,18.
[12]陈红军,郭建春,赵金洲,等.W/O乳化酸体系稳定性实验研究[J].石油与天然气化工,2005,34(2):118-121.
[13]M A BUIJSE.Novel application of emulsified acids to matrix stimulation of heterogeneous formations[R].SPE 65355,2000.
[14]NASR-EL-DIN HA.Stimulation of water-dispodal wells using acid-in-diesel emulsions:case histories[R].SPE65069,2000.
[15]MICHAEL W CONWAY.A comparative study of straight/gelled/emulsified hydrochloric acid diffusivity coefficient using diaphragm cell and rotating disk[R].SPE 65386,1999.
[16]JACK D LYNN.A core based comparison of the reaction characteristics if emulsified and in-situ gelled acids in low permeability,high temperature,gas bearing carbonates[R].SPE 65386,2001.