稠油热采过程中储层的化学反应及其技术对策——以河南油田为例  

The Chemical Reaction in Thermal Recovery of Heavy Oil and Its Countermeasures

作　　者：陈清湘[1] 周辉[1] 康义逵[1] 

机构地区：[1]中石化河南油田分公司勘探开发研究院,河南南阳473132

出　　处：《石油天然气学报》2012年第09X期269-272,共4页Journal of Oil and Gas Technology

摘　　要：利用高压釜模拟河南油田现场储层条件进行稠油热采过程中的化学反应试验,结果表明,在稠油热采过程中,水-岩反应、水-液反应、水-油反应强烈,储层孔隙结构及物性等方面的变化较大。据此,河南油田以井筒为中心,根据温度变化规律把储层划分为高溶出砂区、中溶微粒活跃区、低溶膨胀区、沉淀结垢区共4个区带,对高溶出砂区主要进行高温固砂、封堵、调剖;对中溶微粒活跃区和低溶膨胀区主要采取优化注采参数、添加适量的化学添加剂等技术措施;针对沉淀结垢区远离井筒、剩余油饱和度高的实际,加强剩余油分布规律研究,在剩余油富集的中心地带进行井网完善与加密调整,并加强开发方式转换研究,减少热采物性参数变化带来的危害,提高稠油采收率。实践表明,这些技术对策是合适的,能有效改善开发效果,对同类油田提高采收率有一定的借鉴作用。A high pressure pot was used to imitate the chemical reactions in a reservoir structures of heavy-oil thermal recovery in Henan Oilfield.The results show that the water-rock reaction,water-fluid reaction and water-oil reaction were serious,the reservoir porous structures and physical property were changed greatly.In view of the above and base on wellbore condition,the reservoir was divided into high-dissolution sand producing area,medium-dissolution particle active area,low-dissolution swelling area and depositional scaling area according to its change law.For the high-dissolution sand producing area,high temperature sand consolidation,plugging and profile control were performed.For the medium-dissolution particle active area and low-dissolution swelling area,the technical measures were used for optimizing injection-production parameter and adding proper chemical additive.For the depositional scaling area,the research of remained oil distribution law was strengthened for changing the development modes and reducing damage induced by physical property changes of thermal recovery,and enhancing oil recovery.This plan is suitable and proved to be effective to improve the effect of oil development,it provides reference for enhancing oil recovery of the similar oilfields.

关 键 词：稠油热采 储层 化学反应 技术对策 

分 类 号：TE345[石油与天然气工程—油气田开发工程]