压裂液残渣对不同支撑剂导流能力的影响  

IMPACT OF FRACTURE FLUID RESIDUE ON FRACTURE CONDUCTIVITY PROPPED BY DIFFERENT PROPPANTS

作　　者：王中学 秦升益 张士诚[2] 

机构地区：[1]硅砂资源利用国家重点实验室 [2]中国石油大学.北京

出　　处：《钻采工艺》2017年第1期56-60,8,共5页Drilling & Production Technology

摘　　要：利用导流能力测试装置,测试了压力、温度和压裂液作用对陶粒和树脂覆膜砂填充层导流能力的影响,并对造成填充层导流能力下降的原因进行分析。破胶液返排后,无论对于陶粒还是树脂覆膜砂填充层的导流能力均有较大幅度降低,分别降低了83.07%和69.26%。单独分析压力、温度和压裂液作用三个因素对两种填充层导流能力的影响,发现颗粒的破碎和运移以及破胶液残渣的滞留是造成陶粒填充层导流能力下降的主要原因;而颗粒的变形是造成树脂覆膜砂填充层导流能力下降的主要原因。与陶粒填充层相比,树脂覆膜砂填充层中破胶液返排更加容易和彻底。Experiments were carried out using conductivity test device to study the effects of pressure,temperature and frac fluids on conductivity of fractures packed with ceramics and resin-coated sands. The reasons of decrease in fracture conductivity were also discussed. The flowback of gel-breaking fluid had led to the sharp decrease in conductivity of fractures either propped by ceramics or resin-coated sands,decreased by 83. 07% and 69. 26%,respectively. In all factors,the crushing and migration of proppants and the fracturing fluid residue were found the major factors of conductivity decrease in fractures propped by ceramics,while the proppant deformation was the most factor of conductivity decrease in fractures propped by resin-coated sands. Compared with ceramics-packed fractures,the fracturing fluid could flow back easily and completely in fractures packed with resin-coated sands.

关 键 词：树脂覆膜砂 陶粒 导流能力 伤害机理 破胶液返排率 

分 类 号：TE357.12[石油与天然气工程—油气田开发工程]