预分散速溶胍胶PGW的研制及应用  

Development and application of predispersed instant guar gum

作　　者：高咏梅[1] 王维恒 夏巍巍[1] 刘浩[1] 张斌[1] GAO Yongmei;WANG Weiheng;XIA Weiwei;LIU Hao;ZHANG Bin(Research Institute of Petroleum Engineering,Sinopec East China Oil and Gas Company,Nanjing,Jiangsu 210000,China)

机构地区：[1]中国石化华东油气分公司石油工程技术研究院,江苏南京210000

出　　处：《油气藏评价与开发》2021年第3期437-442,共6页Petroleum Reservoir Evaluation and Development

基　　金：国家科技重大专项“彭水地区常压页岩气勘探开发示范工程”(2016ZX05061)。

摘　　要：为了缩短压裂时间,减少压裂成本,实现连续压裂作业,在室内通过对分散体系、表面活性剂等材料的优选,研制出一种能满足现场连续压裂的预分散速溶胍胶(PGW)。通过浓缩比、水化溶胀时间、交联性能、破胶性能、抗温抗剪切性能等实验,对其综合性能进行了评价。实验结果表明,产品浓缩比(胍胶干粉质量百分比)能达50%以上,30 d无明显分层,水化5 min后黏度能达到体系使用要求,同时具有良好的交联性能和抗温抗剪切性能。在涪陵页岩气田平桥南区块页岩气水平井成功进行了12口井压裂试验,其性能满足现场压裂施工的需求并实现了连续压裂,且压裂液胶液价格降低了32.7%,实现了降本增效的目的。In order to save the fracturing time and cost,and realize consecutive fracturing,a kind of predispersed instant guar gum(PGW),which can be used for successive fracturing,has been developed by the optimization of dispersion system,surfactant and other materials.The comprehensive properties have been evaluated by the experiment of concentration ratio,dissolved time,crosslinking performance,gel breaking performance,heat and shear resistance,etc.The experiment results indicate that the concentration ratio of guanidine gum powder can be more than 50%,there is no obvious stratification in 30 days,the viscosity can meet the requirements of the system after hydration for 5 minutes and the product has good performance of cross-linking,heat resistance and shear resistance.The fracturing tests of twelve horizontal shale gas wells have been successfully carried out in south Pingqiao block of Fuling Shale Gas Field.The product performance can meet the requirements of field fracturing and realize the successive fracturing,and the price of fracturing fluid has been reduced by 32.7%,and the purpose of cost reduction and efficiency increase has been realized.

关 键 词：预分散 速溶胍胶 研制 连续压裂 应用 

分 类 号：TE357[石油与天然气工程—油气田开发工程]