第33卷第6期 2016年11月
钻井液与完井液
DRILLINGFLUID&COMPLETION FLUID
doi: 10.3696/j.issn.1001-5620.2016.06.018
一种可回收清洁压裂液的研制和应用
王改红，廖乐军，郭艳萍
（川庆钻探工程有限公司长庆井下技术作业公司，陕西威阳712000）
Vol.33 No.6 Nov.2016
主改红等，一种可回收清洁压裂减的两制和应用[].结并液与完并准，2016，33（6)：101-105.
在长庆油国体积压裂施工中警要配制大量压裂液，为准免大量消帮水资源，需对压级液进行回收科用，两长摘要
庆区域普遍使用的轻再基及股体系阳收后不施用于携欧，低分子层胶压限减的后收利用工艺复来。固北研制了一种可国收的清洁压裂液，该压整减由3%XYCQ-1期化剂，0.05%XYPJ-2破胶制及（0.01%~0.10%）XYTJ-1水质调节刺构或。 XYCQ-1期化别是将蔗糖经微生勃培育、发酵而得列的一看微生物多糖期化剂，在10s内可使压录求熟度趋干稳定，增剂快。XYPJ-2破胶剂是一鲁天照酶和分子改造酶的源合数，由特异水解测化剂的多转构成，通过对积化剂分子结物遗行定点突实，促进酶有针对性的反应，形或非天陷的新二殊健，从西保证了破胶衰的再次或胶反复使用，XYTJ-1水质调节剂与题排兼中的Ca”、Mg等高价金属高于可形成邻干永的结合特成警含物，消除高价高于对或胶的不利影响，实验表明，该区翠求附温80.0%，且有较好的基、降及曲排性，在常温资置24h和80%水落中静置15min后基本无流降，注入排量专64Lmin时降阻率为67%，岩心损害率收录6.70%。该压裂减在长庆区减油水平并体积改造中应用21口并，施工用液10.46×10”m，返据兼经分高况号等声单外理后即可再配压量求，外理工艺简单，且国收孩配制的清洁压夏液携孕性能良好，现场国收利用多达10次，表明该新型清洁可回收压裂衰能需足争级压聚施工要求。
关键词
清浩医聚液；国再利用；环境保护；期化制：微生费多势；长族端图
文章编号：1001-5620 (2016)06-0101-05
中图分类号：TE357,12
文献标识码：A
TheDevelopment and Application of a Recyclable ClearFracturing Fluid
WANG Gaihong, LIAO Lejun, GUO Yanping
(CDCChanggingDownholeTechnologyCompanyXianyang.Shaanxi 712000)
Abstract Stimulated reservoir volume fracturing operation in Changqing oilfield requires large amount of fracturing fluids. To save water, fracturing fluids are required to be recycled, However, the recycled hydroxypropyl fracturing fluid presently commonly used in Changqingdoes not have the ability to carry sands, and the technique for recycling low molecular weight guar gum fracturing fluid is not feasible for field use. A recyclable clear fracturing fuid was developed recently in an effort to solve these problems. This fracturing fluid was formulated with 3% XYCQ-1 (a thickening agent), 0.05% XYPJ-2 (gel breaker), and 0.01%-0.1% XYTJ-1 (a waterquality conditioner). XYCQ-1is apolysaccharide thickening agent made by microbial cultivation and fermentation,and has the ability to render fracturing fluid stable viscosity in only 10 sec. XYPJ-2 is a mixture of a natural enzyme and a molecularly modified enzyme, composed ofthe same polysaccharide as that in XYCQ-1. Site-specific mutagenesis was used on the molecular structure ofthe thickening agent to promote specific reaction to the enzymes to fom non-natural new disulfide bond, thereby ensuring the gel resuming and recycling of gel-broken fracturing fluid. XYTJ-1, by reaction with Ca** and Mg* in the recycled fracturing fluid to form water-soluble complexes or chelates, eliminates the negative effects of high valence metal ions on gel formation, Laboratory experiments indicated that the properties of the fracturing fluid remained stable at 80 C, and had good sand carrying capacity, frictionreduction and cleanup capacity. Almost no sedimentation was found of the fracturing fluid kept quiescence at room temperature for 24 hours, or stayed in 80 °C water bath for 15 minutes. At injection rate of64 L/min, the percentage of friction reduction was 67%, and percentagc of core damage only 6.70%, In the stimulated reservoir volume fracturing operation in 21 horizontal wells in the Changqing oilfield, 10.46x10* m’ fracturing fluid was consumed, and the reycled fracturing fluid, after simple treatment (liquid-sand separation by settling), was reused for making fracturing fluid. The fracturing fluid has ben recycled for 10 times, and the clear fracturing fluid made
第一作者简介：王改红，工程师，从事压裂液体系研发工作。电话15829585877；E-mail：421635050qq.com。
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