环保型耐盐降阻剂的研制与应用  

Development and Application of Environment-friendly Salt-tolerant Friction Reducer

作　　者：刘倩 管保山[2,3] 刘玉婷[3] 梁利[3] LIu Qian;GUAN Baoshan;LIU Yuting;LIANG Li(College of Chemical Science,University of Chinese Academy of Sciences,Beijing 100190,P R of China;Institute of Porous Flow and Fluid Mechanics,Chinese Academy of Sciences,Langfang,Hebei 065007,P R of China;Research Institute of Petroleum Exploration&Development,PetroChina,Beijing 100083,P R of China)

机构地区：[1]中国科学院大学化学科学学院,北京100190 [2]中国科学院渗流流体力学研究所,河北廊坊065007 [3]中国石油勘探开发研究院,北京100083

出　　处：《油田化学》2020年第4期623-628,共6页Oilfield Chemistry

基　　金：国家重大科技专项“储层改造流体综合性能研究与模拟实验”(项目编号2017ZX05023-003-001)。

摘　　要：为实现高矿化度盐水直接配制滑溜水进行体积压裂,解决常规W/O反相乳液降阻剂存在的成本较高和环境污染问题,通过分散乳液聚合法,在聚合反应中引入极性亲水单体和耐盐阳离子单体,得到了一种环保型耐盐W/W分散乳液降阻剂PADD,分别考察了PADD的溶解性能、耐温性能、降阻性能以及对岩心的伤害情况,并报道了现场应用情况。研究表明,质量分数为0.1%的PADD在清水、40 g/L和80 g/L的矿化水中均可以快速均匀分散,在高矿化度(80 g/L)条件下,PADD分子结构依然稳定;质量分数为0.1%的PADD溶液在80℃下老化72 h后的黏度保持率大于90%,在3种不同矿化度下质量分数0.1%的PADD溶液降阻率均在70%以上,且对岩心的伤害较小。以PADD为主剂采用返排液配制的耐高矿化度滑溜水已在威202H16平台成功应用。图4表3参16。In order to realize the direct preparation of slick-water with high salinity brine for volume fracturing,and to solve the high cost and environmental pollution problems of conventional W/O inverse emulsion friction reducer.An environmentally friendly salt-tolerant friction reducer PADD was prepared through introducing polar hydrophilic monomer and salt-tolerant cationic monomer into the polymer by emulsion dispersion polymerization method.The solubility,temperature resistance,resistance reduction performance and damage to the core of PADD were investigated,respectively,and the field application of PADD slick-water was mentioned.The results showed that PADD with mass fraction of 0.1%could be quickly and uniformly dispersed in clean water,40 g/L and 80 g/L mineralized water,respectively.Under the condition of high salinity(80 g/L),the molecular structure of PADD remained stable.The PADD solutions with mass fraction of 0.1%under three different salinities were aged for 72 h at 80℃,and the viscosity retention rate was greater than 90%,the drag reduction rate was above 70%,and there was less damage to the core.The high-salinity-resistant slick-water prepared with the flowback fluid using PADD as the main agent has been successfully applied inWei 202H16.

关 键 词：降阻剂 滑溜水 耐盐 聚合物 降阻率 

分 类 号：TE348[石油与天然气工程—油气田开发工程]