多元改性速溶胍胶压裂液研究与应用

Research and Application of a Multicomponent Modified Instant Guar Fracturing Fluid

刘立宏 王娟娟 高春华

Liu Lihong Wang Juanjuan Gao Chunhua

中国石化东北油气分公司工程技术研究院, 吉林长春 130062

Research Institute of Engineering Technologh, Sinopec Northeast Petroleum Company, Changchun, Jilin, 130062, China

为克服传统胍胶压裂液溶胀速度慢、现场配制时间长、破胶后残渣含量高等缺点,研制了一种多元改性速溶胍胶压裂液.在清水中加入一定量的羧甲基和羟丙基双改性胍胶及杀菌剂、黏土稳定剂、交联剂等处理剂,配制得到多元改性速溶胍胶压裂液.室内试验表明,该压裂液溶胀速率快,1 min溶胀率已达到3 min溶胀率的94.7%,溶胀速度较羟丙基速溶胍胶压裂液提高了18.75%;水不溶物含量极少,较羟丙基速溶胍胶压裂液降低了88.46%;破胶后的残渣含量降低超过71.0%,对支撑剂导流能力的伤害降低了62.0%,对岩心渗透率的伤害降低了53.8%,其综合性能达到现场施工要求.现场应用表明,多元速溶改性胍胶压裂液能够满足大规模水平井压裂施工的要求,并能为低渗透、特低渗透储层的有效开发提供技术支撑.

Traditional guar fracturing fluid is disadvantageous because of its characteristics of slow swelling, long on-site preparation times, and high residue content after gel breaking. In order to overcome the problems, a certain quantityof double modified carboxymethyl + hydroxypropyl guanidine gum and other additives (e.g. bactericide, clay stabilizer, and crosslinker) were added in water, making its comprehensive performance to meet the site construction requirements. Thus, a multicomponent modified instant guar fracturing fluid system was developed. The new fracturing fluid system had a fast swelling rate, reaching more than 94.7% final viscosity in one minute, and a low water insoluble matter content, it was lowered by 88.46% than the hydroxypropyl guar; the residue content reduced by 71.0%, the flow conductivity of propping agent damage dropped by 62.0% and the core permeability decreased by 53.8%. Laboratory tests and site operations demonstrated that the multicomponent modified instant guar fracturing fluid could satisfy the online mixing requirements of the large-scale fracturing operation used in horizontal wells, and could provide technical support for the effective development of low permeability reservoir.

https://doi.org/10.11911/syztjs.201503021