新疆石油地质

›› 2016, Vol. 37 ›› Issue (4): 1-1.doi: 10.7657/XJPG20160413

• 论文 •    

胍胶压裂液对储集层渗透率的伤害特征

徐林静，张士诚，马新仿   

  1. (中国石油大学 石油工程教育部重点实验室,北京 102249)
  • 出版日期:2019-01-01 发布日期:1905-07-15

Characteristics of Damage of Guar Fracturing Fluid to Reservoir Permeability

XU Linjing, ZHANG Shicheng, MA Xinfang   

  1. (Key Laboratory for Petroleum Engineering of Ministry of Education, China University of Petroleum, Beijing 102249, China)
  • Online:2019-01-01 Published:1905-07-15

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摘要： 常规胍胶压裂液破胶后对岩心渗透率仍存在一定伤害，影响压裂改造后油气井的产能。在分析胍胶压裂液组分的基础上，采用人造岩心和天然岩心进行了动、静态吸附实验和岩心伤害实验。人造岩心伤害实验结果表明，胍胶压裂液的破胶液对岩心基质伤害主要分为水相伤害和胍胶滞留伤害，其中水相伤害占比高于胍胶滞留伤害；吸附实验结果表明，破胶液中胍胶分子在岩心孔隙中的滞留主要分为吸附和捕集，其中胍胶分子的平均吸附量占43.6%，平均捕集量占56.4%；天然岩心伤害实验也证实，胍胶压裂液的破胶液对天然岩心的伤害主要是水相伤害，相对水相伤害，破胶后的胍胶分子对岩心渗透率的影响则较弱。

Abstract: Conventional guar fracturing fluid will damage core permeability after gel?breaking, and influence oil well productivity after fracturing stimulation. Based on the analysis on guar fracturing fluid compositions, dynamic and static adsorption experiments and core?damage experiment are carried out for artificial cores and natural cores. Artificial core?damage experiment result shows that the damage of guar breaking liquid can be classified as water damage and guar retention damage, of which water damage is more serious than guar retention damage. Adsorption experiment result shows that the retention of the guar molecules of gel?breaking liquid in pores of cores can be classified into adsorption and trapping, accounting for 43.6% and 56.4% in average, respectively. The result from natural core damage experiment in Yuanba area also shows that the gel?breaking liquid in guar fracturing fluid has an aqueous?phase damage to natural cores. Guar molecules after gel?breaking have less impact on permeability of natural cores compared with aqueous?phase damage

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