超高密度钻井液分散剂的合成及性能评价  

Synthesis and Performance Evaluation on Dispersant of Ultra-high Density Drilling Fluid System

作　　者：谢建宇[1] 张滨[1] 李彬[1] 

机构地区：[1]中原石油勘探局钻井工程技术研究院

出　　处：《钻井液与完井液》2013年第3期4-6,91,共3页Drilling Fluid & Completion Fluid

基　　金：中原石油勘探局重大科技攻关项目"超高密度钻井液分散剂的研制"(2011310)部分研究成果

摘　　要：以天然材料与乙烯基单体进行接枝共聚合成了超高密度钻井液用分散剂JZ-1,对相对分子质量调节剂、引发剂、天然材料与乙烯基单体配比等因素对分散剂性能的影响进行了考察。通过IR对共聚物进行了红外表征,借助热分析对共聚物进行了热稳定性评价,并对其在钻井液中的分散性能进行了室内评价。研究结果表明,在密度为2.8 g/cm3的钻井液中加入2%JZ-1,体系漏斗黏度由282 s降低至130 s,24 h上下密度差从0.56 g/cm3降低至0.03 g/cm3,显著提高了钻井液的流变性和沉降稳定性。The dispersant JZ-1 of ultra-high density drilling fluid system is synthesized by graft copolymerization of natural materials and vinyl monomer.The effects of molecular weight regulator,initiator and raw materials ratio on the dispersant propertieswerestudied.CopolymerizationwascharacterizedwithIR.Thermalstabilityofcopolymerwasmeasuredbythermal analysis.The mud properties of copolymer as dispersant for drilling fluids were evaluated in laboratory.The experimental results show that funnel viscosity is decreased from 282 s to 130 s when 2% JZ-1 is added to the density of 2.8 g/cm 3 drilling fluid system,which the rheology and sedimentation stability are improved significantly.

关 键 词：超高密度钻井液 分散剂 合成 

分 类 号：TE254.4[石油与天然气工程—油气井工程]