蒸汽辅助重力泄油(SAGD)注采参数分析及优化研究  

Analysis and optimization of injection-production parameters for steam assisted gravity drainage

作　　者：范杰[1] 李相方[1] 

机构地区：[1]中国石油大学(北京)石油工程教育部重点实验室,北京102249

出　　处：《中国科技论文》2016年第9期988-994,共7页China Sciencepaper

基　　金：国家自然科学基金资助项目(50974128)

摘　　要：蒸汽辅助重力泄油(steam assisted gravity drainage,SAGD)技术自提出以来便成为了1种开发特稠油与超稠油油藏的有效手段。蒸汽辅助重力泄油过程中蒸汽腔的发育与传热决定了SAGD的开发效果,合理的注采参数可以改善SAGD蒸汽腔的发育、降低热损失。采用正交设计分析了不同注采参数对SAGD采收率与累计油汽比的影响,通过方差分析得出注汽速度、采注比对SAGD采出程度的影响最明显,SAGD的累计油汽比主要受注汽干度、注汽速度的影响。同时,结合实际SAGD开发区块,采用数值模拟依次优化了该区块双水平井SAGD的注汽速度、注汽干度、注汽温度以及采注比,得出最优值依次为300m3/d、0.7%、250℃、1.2。研究结果表明,采用双水平井SAGD开采特超稠油可以取得较高的开发效果。The steam assisted gravity drainage（SAGD）has become an effective method for heavy oil reservoir development.The development of steam chamber and the heat-transfer determine the development effectiveness of SAGD process.Reasonable injection-production parameters can improve the chamber＇s development level and reduce the heat loss.The influences of different injection-production parameters on the recovery rate and cumulative oil-stream ratio are investigated through orthogonal experiment analysis.It＇s obtained that SAGD recovery is affected by the injection stream speed and production-injection ratio,and SAGD accumulation oil-stream ratio is determined by the steam quality and injection stream speed.Meanwhile,based on the actual SAGD block,the numerical simulation is used to optimize the steam injection rate,dryness,temperature,and the injection-production ratio of the dual horizontal well SAGD.It is shown that the optimal values are 300m3/d,0.7%,250 ℃ and 1.2respectively.The research concludes that a relatively b development effectiveness can be obtained with dual horizontal well SAGD when it comes to the super heavy oil reservoir.

关 键 词：稠油油藏 蒸汽辅助重力泄油 正交设计 注采参数 开发效果 

分 类 号：TE345[石油与天然气工程—油气田开发工程]