耐高温型聚合物压裂液体系研制与性能评价  

Development and Performance Evaluation of High Temperature Resistant Polymer Frac⁃turing Fluid System

作　　者：黄崇辉 石广远 范东阳 全美荣 黄世强 蔡敬耀 郝鹏 HUANG Chonghui;SHI Guangyuan;FAN Dongyang;QUAN Meirong;HUANG Shiqiang;CAI Jingyao;HAO Peng(Downhole Service Company of BHDC,CNPC;No.3 Oil production Plant of Huabei Oilfield Company,CNPC;Bayan Petroleum Engineering Branch of BHDC,CNPC;No.1 Oil production Plant of Huabei Oilfield Company,CNPC;Erlian Branch of Huabei Oilfield Company,CNPC)

机构地区：[1]中国石油渤海钻探井下作业分公司 [2]中国石油华北油田公司第三采油厂 [3]中国石油渤海钻探巴彦石油工程分公司 [4]中国石油华北油田公司第一采油厂 [5]中国石油华北油田公司二连分公司

出　　处：《油气田地面工程》2024年第3期36-41,48,共7页Oil-Gas Field Surface Engineering

摘　　要：随着油气开采的深入,对于高温、高压、高盐度等复杂地层的开发需求日益加剧。传统的压裂液在这类地层中表现出的稳定性和性能受到限制,因此以丙烯酰胺(AM)、丙烯酸(AA)、甲基丙烯酰氧乙基三甲基氯化铵(DMC)和N,N-二甲基十八烷基烯丙基氯化铵(DOAC)为原料,通过自由基聚合反应制备出耐高温稠化剂(DPAM)。实验结果表明,DPAM具有良好的增稠、耐温、抗剪切、黏弹性等性能,适用于碳酸盐地层分流酸化。DPAM通过聚合物分子缔合作用和甜菜碱侧链与钙离子螯合作用形成三维网络结构实现增稠效果。DPAM溶液的储能模量G'始终高于耗能模量G";滤失系数k<1.0×10^(-3)m/min^(1/2)、滤失速率R<1.5×10^(4)m/min、初始滤失量V0<5.0×10^(-2)m^(3)/m^(2);陶粒的沉降速率低于0.48 cm/min;当NaBO_(3)加量为0.1%(质量分数)时,在110 min时,压裂液的黏度降低至30 mPa∙s,表明压裂液体系具有良好的携砂性能、滤失控制能力和破胶性能。此研究为耐高温聚合物压裂液的合成和应用提供了理论基础。With the deepening of oil and gas extraction,the demand for the development of complex formations such as high temperature,high pressure,and high salinity is increasing.The stability and performance of traditional fracturing fluids in this type of formation are limited.Based on this,this paper uses acrylamide(AM),acrylic acid(AA),methacryloyloxyethyl trimethyl ammonium chloride(DMC)and N,N-dimethyloctadecyl allyl ammonium chloride(DOAC)as raw materials,the hightemperature resistant thickener DPAM is prepared by free radical polymerization.Experimental results show that DPAM has good properties such as thickening,temperature resistance,shear resistance,and viscoelasticity,and is suitable for diversion acidification in carbonate formations.DPAM achieves the thickening effect by forming a three-dimensional network structure through the association of polymer molecules and the chelation of betaine side chains and calcium ions.The storage modulus G′of DPAM solution is always higher than the loss modulus G".Its fluid loss coefficient k<1.0×10^(-3)m/min^(1/2)tration rate R<1.5×10^(4)m/min,initial filtration loss V0<5.0×10^(-2)m^(3)/m^(2).The sedimentation rate of the ceramic particles is lower than 0.48 cm/min.When the NaBO_(3)dosage is 0.1%(mass fraction),the viscosity of the fracturing fluid decreases to 30 mPa∙s at 110min,indicating that the fracturing fluid system has good sand-carrying performance,fluid loss control ability,and gel breaking performance.This paper provides a theoretical basis for the synthesis and application of high-temperature resistant polymer fracturing fluid.

关 键 词：压裂液 DPAM溶液 稠化剂 耐高温 

分 类 号：TE357.12[石油与天然气工程—油气田开发工程]