低渗稠油油藏热采效果影响因素分析及水平井优化  

Influence factors on thermal recovery effect and horizontal well optimization in low-permeability heavy oil reservoir

作　　者：丁一萍[1,2] 刘传喜[2] 凡玉梅[2] 王强[2] 董志刚[3] 阚新东[4] 

机构地区：[1]中国石油大学博士后流动站,北京102249 [2]中国石化石油勘探开发研究院,北京100083 [3]中国石油辽河油田分公司,辽宁盘锦124010 [4]中国石油大港油田分公司,天津300280

出　　处：《断块油气田》2011年第4期489-492,共4页Fault-Block Oil & Gas Field

基　　金："十二五"国家科技重大专项"裂缝-孔隙型碳酸盐岩稠油油藏开发关键技术研究"(2011ZX05031-002)

摘　　要：以剖析低渗稠油油藏是否适合水平井热采方式开发为目的,探讨储层物性对热采效果影响的同时,重点对低渗稠油油藏热采的井型及热采水平井水平段长度展开优化研究。利用热采数值模拟方法,分别建立了低渗中黏、高渗高黏、中渗高黏、高渗中黏等4种不同油藏类型的油藏均质模型,以热采周期生产油汽比和累计产油量完成特征指标对比。结果显示,低渗稠油油藏除渗透率外,其他条件都符合热采标准,并且综合因素流度对其影响效果更大。对于低渗中黏稠油油藏而言,水平井单井平均日产油量是普通直井的1.53倍,水平井开发效果更好。尤其是水平井技术在应用过程中,不会发生中高渗、高黏度稠油油藏的末端效应,水平井可以均匀注汽。低渗稠油油藏合理水平井应用长度在300～400 m效果最佳,得出最佳水平井应用方案。In order to analyze the suitability of horizontal well in the thermal recovery of low-permeability heavy oil reservoir,this paper focuses on the thermal recovery well type of low-permeability heavy oil reservoir and the horizontal section length of horizontal well in thermal recovery when the influence factors of reservoir property on thermal recovery effect are discussed.Used the method of thermal-recovery numerical simulation,four different reservoir types of models are established,which are the low permeability and medium viscosity,high permeability and high viscosity,medium permeability and high viscosity,and high permeability and medium viscosity respectively,so as to contrast the characteristics of production steam-oil ratio and cumulative oil production.The result shows that other conditions of reservoir are all in accord with the thermal recovery standards except low permeability in low-permeability heavy oil reservoir,and fluid mobility is a great effect factor on the reservoir.As far as low permeability and medium viscosity heavy oil reservoir is concerned,daily average oil production of single well of horizontal well is 1.53 times more than vertical well.The optimal horizontal section length is 300-400 m in horizontal well of heavy oil reservoir,and the optimal application plan of horizontal well is obtained.

关 键 词：低渗稠油油藏 井型对比 末端效应 优化设计 

分 类 号：TE357.44[石油与天然气工程—油气田开发工程]