超低浓度胍胶压裂液体系在大牛地致密气田的现场试验.pdf

石油与天然气化工
第46卷第3期
CHEMICAL ENGINEERING OF OIL & GAS
超低浓度胍胶压裂液体系在大牛地致密气田的现场试验
杨同玉1何青付娜2陈世军2赵静
中国石油化工股份有服公司华北油气分公司工程技术管理部
2.大连知微生物科技有限公司
摘要大牛地气田具有低压致密、储层物性差、易水锁伤害及敏感性等特征,不经过储层政造措
施无法获得高产能。在常规0.45%(の)胍胶压裂液体系的基础上,通过对交联剂、助排剂和破胶剂进行
优化调整,研发出一种超低浓度胍胶压裂液体系。结果表明,使用强交联剂 SITAR-11,可将羟丙基胍
胶的质量分数由常规的0.45%降低至0.30%,交联后的冻胶在90℃C、170s2下剪切120min后,黏度
大于140mPa?s,在38%的高砂比时,仍具有优良的携砂能力。使用生化复配型高效助排剂 ZITHIE-
34,破胶液表面张力降至22.4mN/m,界面张力降至0.9mN/m。使用压裂破胶酶 FANFA-06和APS
耦合式破胶技术,残渣量由常规体系破胶后的300mg/L降至180mg/L,降低了对地层的伤害。在大
牛地气田山1和盒1儲层进行了2口水平井的压裂施エ,压裂过程中加砂比和施工压力均满足设计要
求,压后返排率为28.2%和30.1%,无阻流量为7.7×10m/d和10.8X10m3/d,増产效果显著。
关键词大牛地致密气田超低浓度胍胶强交联剂高效助排剂压裂破胶酶地层伤害
中图分类号:TE357
文戴献标志码:ADOI:10.3969/j.issn.1007-3426.2017.03.013
Field trials of ultra-low concentration guar gum fracturing fluid
system in Daniudi tight gas reservoir
Yang Tongyu, He Qing Fu Na*, Chen Shijun", Zhao Jing
1. Department of Engineering Technology Management, North China Oil and Gas Com pany, Sino pec
Zhengzhou, Henan, China; 2. Dalian Chivy Biotechnology Limited Com pany, Dalian, Liaoning, China
Abstract: The Daniudi gas field had the characteristics of low pressure, tight, poor physical
property, water locking damage and sensibility etc, and only reformation measures of reservoir could
obtain high productivity. On the basis of conventional 0. 45% guar gum fracturing fluid system, a
guar gum fracturing fluid system with ultra-low concentration was developed through the adjustment
and optimization of the cross-linking agent, cleanup additive and gel breaker. The result showed that
the concentration of hydroxypropyl guar gum could decrease from.45% to 0. 30% by using the
ultra-strong crosslinker SITAR-11, the viscosity of crosslinked jelly was more than 140 mpa. s under
90 C, 170 s"after shearing 120 min, and it still had fine prop-carrying ability under 38% high sand
concentration. By using biochemical mixed efficient cleanup additive ZITHE-34, the surface tension of
the gel breaking fluid reduced to 22.4 MN/m, and the interfacial tension reduced to 0.9 MN/m
基金项目:国家科技重大专项“低丰度致密低滲油气藏开发关键技术”(2016ZX05048);中石化科技部项目“致密砂岩油藏有效
开发关键技术应用研究”(P14076-1);辽宁省“百千万人オ工程”重点项目“高效降解氯酚类污染物的海洋漆酶”(2015-4);大连市科
技计划项目“新型环境酶制剂开发与产业化”(2015F11GH089)
作者简介:杨同玉(1966-),现就职于中国石油化工股份有限公司工程技术管理部,主要从事低孔致密气藏储层改造工艺方案
设计及压裂助剂评价的研究工作。E-mail:hbjyty@126.com
万方数据