低摩阻高比重耐高温压裂液的制备与性能评价
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摘要
针对塔里木盆地顺北区块储层埋藏深(8600 m)、温度高(180℃)及岩性致密的特点,用稠化剂GX-100、自制的有机锆交联剂WQ-60和加重剂KCl制得低摩阻高比重耐高温压裂液体系,评价了该体系的耐温抗剪切性、减阻性及破胶性能,并在塔里木盆地顺北区块进行了现场应用。结果表明,配方为0.5%GX-100+0.65%WQ-60+2.5%pH调节剂+20%KCl的压裂液可加重至密度1.1 g/cm3。压裂液耐温抗剪切性能良好,在180℃、170 s-1下剪切90 min的黏度大于50 m Pa·s,降阻率超过60%,且具有低残渣、破胶水化彻底等优点,满足现场压裂施工要求。
According to the characteristics of reservoir burial depth(8600 m),high temperature(180℃) and lithologic compactness in Shunbei block of Tarim Basin,a fracturing fluid system with low friction,high density and high temperature resistance was prepared by using thickener GX-100,self-made organic zirconium crosslinker WQ-60 and weighting agent KCl. The temperature and shear resistance,drag reduction and gel breaking properties of the system were evaluated. Field application was carried out in Shunbei block of Tarim Basin. The results showed that the fracturing fluid system composed of 0.5% GX-100,0.65%WQ-60,2.5% pH modifier and 20% weighting agent KCl could be aggravated to density of 1.1 g/cm3. The fracturing fluid had good temperature resistance and shear resistance. The viscosity of fracturing fluid was higher than 50 mPa·s after shearing 90 min at180℃ and 170 s-1. The drag reduction efficiency of the solution was greater than 60%. In addition,the gel broke completely and the residue quantity was low,which satisfied the requirement of fracturing construction.
According to the characteristics of reservoir burial depth(8600 m),high temperature(180℃) and lithologic compactness in Shunbei block of Tarim Basin,a fracturing fluid system with low friction,high density and high temperature resistance was prepared by using thickener GX-100,self-made organic zirconium crosslinker WQ-60 and weighting agent KCl. The temperature and shear resistance,drag reduction and gel breaking properties of the system were evaluated. Field application was carried out in Shunbei block of Tarim Basin. The results showed that the fracturing fluid system composed of 0.5% GX-100,0.65%WQ-60,2.5% pH modifier and 20% weighting agent KCl could be aggravated to density of 1.1 g/cm3. The fracturing fluid had good temperature resistance and shear resistance. The viscosity of fracturing fluid was higher than 50 mPa·s after shearing 90 min at180℃ and 170 s-1. The drag reduction efficiency of the solution was greater than 60%. In addition,the gel broke completely and the residue quantity was low,which satisfied the requirement of fracturing construction.
引文
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[3]刘朝曦.耐高温共聚物压裂液体系的研究与应用[J].油田化学,2013,30(4):509-512.
[4]赵立强,牟媚,罗志锋,等.中国致密油储层改造理念及技术展望[J].西南石油大学学报(自然科学版),2016,38(6):111-118.
[5] WEIJERS L,GRIFFIN L G. The first successful fracture treatment campaign conducted in Japan:stimulation challenges in a deep naturally fractured volcanic rock[C].//SPE Annual Technical ConferenceandExhibition,SanAntonio,Texas,2002:1-13.
[6]董景锋,汪志臣,怡宝安,等.低浓度胍胶压裂液体系的研究与应用[J].油田化学,2017,34(1):43-47.
[7]郭建春,王世彬,伍林.超高温改性瓜胶压裂液性能研究与应用[J].油田化学,2011,28(2):201-205.
[8]王满学.低伤害液体瓜胶压裂液LGC-1性能研究与应用[J].石油与天然气化工,2005,20(1):59-61.
[9]邓敦夏.深层超高温储层压裂改造关键技术研究[D].成都:西南石油大学,2009:2-3.
[10]黄世财,刘通义,董樱花,等.非交联压裂液的摩阻测试及现场应用[J].钻采工艺,2015,12(1):109-112.
[11]刘通义,郭拥军,罗平亚,等.清洁压裂液摩阻特性研究[J].钻采工艺,2009,32(5):85-86.
[12] LUNGWITZ B,BRADY M E,DANIEL S,et al. Viscoelastic surfactant fluids stable at high brine concentrations:US6762154 B2[P]. 2004-07-13.
[13]李林地,张士诚,徐卿莲.无伤害VES压裂液的研制及其应用[J].钻井液与完井液,2011,28(1):52-54.
[14]张锋三,任婷,张军涛,等.一种磺酸型表面活性剂压裂液的研究及应用[J].石油钻采工艺,2015,14(6):94-97.
[15]费学宁.耐200℃高温压裂施工冻胶的制备方法:201510495678.6[P]. 2015-12-09.
[16]马悦.有机钛/AM/AA/DEAM三元共聚物压裂液体系制备及应用研究[D].西安:陕西科技大学,2015:28-29.
[17]吕彦清.水基压裂液添加剂的研究与应用[D].兰州:兰州理工大学,2011:23-24.
[18]刘红磊.腰英台油田低渗透储层改造技术研究[D].北京:中国石油大学,2007:12.
[19]刘通义,陈江明,赵众从,等. BCG-1深井加重清洁压裂液体系[J].钻井液与完井液,2016,33(2):122-126.
[20]杨亚宇,徐小刚,杨晓春,等.不同pH值下交联胍胶压裂液的性能研究[J].石油与天然气化工,2010,39(5):427-430.
[21]娄燕敏.低伤害耐高温压裂液的研制与应用[D].大庆:东北石油大学,2013:56.
[22]何良好.聚合物稠化剂制备及超高温压裂液[D].上海:华东理工大学,2012:2-3.