聚合物凝胶体系脱水规律与调驱效果评价  

The dehydration law and profile controlling effect evaluation of the polymer gel system

作　　者：王纪伟[1] 宋丽阳[2] 宋考平[1] 盖建 蒋文超[3] 隋殿雪 

机构地区：[1]东北石油大学提高油气采收率教育部重点实验室,黑龙江大庆163318 [2]中国石化石油勘探开发研究院,北京100083 [3]大庆油田第一采油厂,黑龙江大庆163000 [4]大庆油田第四采油厂,黑龙江大庆163000

出　　处：《油气藏评价与开发》2017年第6期61-65,共5页Petroleum Reservoir Evaluation and Development

基　　金：国家科技重大专项"海上油田化学驱综合调整技术研究"(2016ZX05025-003-05);东北石油大学研究生创新科研项目"特高含水期油藏综合治理调整技术研究"(YJSCX2016-007NEPU)

摘　　要：采用测试成胶过程中黏度和透光率变化、似晶格模型理论和高分子吸水溶胀法、数学和动力学法、流动实验分别研究凝胶体系的成胶机理、脱水机理、脱水规律特点、脱水后封堵效果。研究得出,凝胶体系的交联成胶过程分为前后两个时期,前期主要发生分子内交联,后期主要发生分子间交联。凝胶体系的交联程度主要与交联点之间分子的平均分子量有关,凝胶体系的交联程度超过其自身特定浓度下的临界交联程度时,凝胶体系出现收缩脱水现象;凝胶体系的成胶过程和脱水过程没有完全的界限,成胶过程和脱水过程是同时发生的;脱水状态的凝胶体系的封堵效率为71.55%,凝胶体系对高渗层进行了有效封堵且封堵效率较高。This paper mainly studies the gelling and dehydration mechanisms in the polymer gel flooding by testing the viscosity and light transmittance of the gel. The lattice model theory, polymer water absorption swelling method, mathematical and dynamic analysis method, and flow experiment method were used in this study. According to the studying results, the glue process of the gel system can be divided into two periods. The internal crosslinking of the molecular happens in the early period, and the intermolecular crosslinking happens in the later period. The crosslinking extent of the gel system is mainly determined by the average molecular weight of the crosslinking points. When the crosslinking extent of the gel system improves beyond the critical crosslinking degree, the dehydration will happen in the gel system. The gelling and dehydration processes will happen at the same time during the production. The plugging efficiency of the dehydrated gel system is 71.55 %. The gel system can effectively plug the layers with high permeability.

关 键 词：凝胶体系 成胶机理 脱水机理 交联程度 透光率 封堵效率 

分 类 号：TE357[石油与天然气工程—油气田开发工程]