缩膨剂防膨和缩膨机理探究  

Anti Swelling and Shrinkage Swelling Mechanism of Shrinkage Swelling Agent

作　　者：赵凯强 于丹 吴琼 杨超 ZHAO Kaiqiang;YU Dan;WU Qiong;YANG Chao(Sinopec(Dalian)Petrochemical Research Institute Company Ltd,Dalian,Liaoning 116045,P R of China;Liaoning Oilfield Chemical Engineering Technology Research Center,Dalian,Liaoning 116045,P R of China;College of Petrochemical Engineering,Liaoning Petrochemical University,Fushun,Liaoning 113005,P R of China;Research Institute of Petroleum Engineering Technology,Shengli Oilfield Branch Company,Sinopec,Dongying,Shandong 257000,P R of China)

机构地区：[1]中石化(大连)石油化工研究院有限公司,辽宁大连116045 [2]辽宁省油田化学工程技术研究中心,辽宁大连116045 [3]辽宁石油化工大学石油化工学院,辽宁抚顺113005 [4]中国石油化工股份有限公司胜利油田分公司石油工程技术研究院,山东东营257000

出　　处：《油田化学》2023年第3期447-452,459,共7页Oilfield Chemistry

基　　金：中国石化科技项目“中低渗透油藏化学剂的开发及应用”子课题“水敏油藏化学品的开发与应用”(项目编号420055-5)。

摘　　要：对于泥质含量高、渗透率低的油藏,缩膨剂能起到降压、增注的效果,但尚无相关机理的研究报道。针对这一问题,考察了含有季铵、伯胺基团的缩膨剂(DSJ-1)加量对膨润土防膨率和缩膨率的影响,并对处理前后的膨润土进行了X射线衍射(XRD)、X射线荧光光谱(XRF)、Zeta电位、热重分析、粒度分布和光学显微镜表征,对DSJ-1的防膨和缩膨机理进行了分析。结果表明,在防膨处理过程中,DSJ-1主要吸附在膨润土表面,吸附量、Zeta电位对防膨率的影响最大;在缩膨处理过程中,DSJ-1主要吸附在晶层间,颗粒聚集体尺寸、Zeta电位影响缩膨率的大小。For reservoirs with high mud content and low permeability,shrinkage swelling agent can reduce pressure and increase injection,but there are no research reports on the relevant mechanisms.In order to solve this problem,the influence of the dosage of shrinkage swelling agent(DSJ-1)containing quaternary ammonium and primary amine groups on the anti swelling rate and shrinkage swelling rate of bentonite was investigated.Then the bentonite before and after treatment was characterized by X-ray diffraction(XRD),X-ray fluorescence spectrum(XRF),Zeta potential,thermogravimetry,particle size distribution and optical microscope.The anti swelling and shrinkage swelling mechanism of DSJ-1 was analyzed.The results showed that during the anti swelling treatment process,DSJ-1 was mainly adsorbed on the surface of bentonite.The adsorption amount and Zeta potential had the greatest impact on the anti swelling rate.During the shrinkage swelling treatment,DSJ-1 was mainly adsorbed between crystal layers.The particle aggregate size and Zeta potential affected the shrinkage swelling rate.

关 键 词：膨润土 缩膨剂 防膨率 缩膨率 机理 

分 类 号：TE39[石油与天然气工程—油气田开发工程] TE357.6