摘要
针对昌吉油田梧桐沟油藏埋藏深、黏度高、水敏性强、渗透率低且级差大,采用常规热采技术难以进行有效开发的问题,运用热采物理模拟方法,进行了多元热流体开发技术的实验研究。研究表明:常规热水驱驱油效率和体积波及系数虽能得到一定程度的改善,但在现场实施时加剧了窜流的风险;研发的3种多元热流体驱油体系,其驱油效率比相同温度下水驱分别提高了26.88、20.55及19.10个百分点;二维模型150℃下进行多元热流体段塞驱采收率可达67.59%,梧桐沟油藏采用多元热流体驱开发在技术上是可行的。目前正在现场开展热水+多元热流体段塞驱先导试验,已初步见到良好效果,研究结果对类似的非常规稠油油藏实现有效开发具有指导意义。
Wutonggou reservoir in Changji Oilfield can not be developed effectively by conventional thermal processes,for its characteristics like large buried depth,high viscosity,strong water sensitivity,low permeability and large differential. In this regard,an experimental research is conducted on multiple thermal fluid technology by physical simulation of thermal production. The research result indicates that,although the displacement efficiency and volumetric sweep efficiency can be improved by conventional hot water drive,the risk of channeling increases. Additionally,the displacement efficiency of 3 multiple thermal fluid drive systems is26. 88%,20. 55% and 19. 10% higher than that of water drive. With 2D model at 150℃,the recovery rate by multiple thermal slug fluid drive can reach 67. 59%. Therefore,it is feasible technically to develop Wutonggou reservoir with multiple thermal fluid drive. Currently,pilot test with hot water + multiple thermal fluid slug drive is conducted on site,with good signs. The research result is of significance to the effective development of unconventional heavy oil reservoir.
出处
《特种油气藏》
CAS
CSCD
北大核心
2014年第4期134-137,157-158,共4页
Special Oil & Gas Reservoirs
基金
"十二五"国家大型油气田及煤层气开发科技重大专项项目"稠油油藏多元热流体技术"部分研究内容(2011ZX05012-005)
关键词
非常规稠油油藏
物理模拟
开发方式
常规水驱
热水驱
多元热流体驱
梧桐沟油藏
unconventional heavy oil reservoir
physical simulation
development mode
conventional water drive
hot water drive,multiple thermal fluid drive
Wutonggou reservoir
