超稠油溶剂辅助SAGD启动技术油藏适应性研究  

Solvent-Assisted SAGD Startup Technology Adaptability in Super-Heavy Oil Reservoir

作　　者：杨兆臣[1] 于兵[1] 吴永彬[2] 王丽[1] 张家豪[1] 佟娟[1] 姜丹[1] 张崇刚[3] Yang Zhaochen;Yu Bing;Wu Yongbin;Wang Li;Zhang Jiahao;Tong Juan;Jiang Dan;Zhang Chonggang(PetroChina Xinjiang Oilfield Company,Karamay,Xinjiang 834000,China;PetroChina Research Institute of Petroleum Exploration and Development,Beijing 100083,China;PetroChina Liaohe Oilfield Company,Panjin,Liaoning 12400,China)

机构地区：[1]中国石油新疆油田分公司,新疆克拉玛依834000 [2]中国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124000

出　　处：《特种油气藏》2020年第4期67-72,共6页Special Oil & Gas Reservoirs

基　　金：国家科技重大专项“稠油/超稠油开发关键技术”(2016ZX05012);中国石油科技项目“稠油注溶剂开采新技术研究”(2016B-1403)。

摘　　要：针对双水平井SAGD常规蒸汽循环预热启动存在的蒸汽预热降黏慢、循环预热时间长、蒸汽消耗量大、井间动用不均衡等问题,采用室内实验和数值模拟相结合的方法,对溶剂辅助SAGD预热启动技术的原理与适用性进行了研究。研究结果表明:溶剂辅助SAGD具有缩短预热时间、减少蒸汽用量、实现井间均匀连通的效果,适用于水平段井间渗透率不小于500 mD、含油饱和度不小于60%、50℃原油黏度为2.0×10^4~10.0×10^4mPa·s的超稠油油藏。形成的油藏筛选条件为其他稠油油藏开展溶剂辅助SAGD启动技术提供了筛选依据。In order to improve the low viscosity reduction rate of steam preheating,long preheating cycle,large steam consumption,uneven interwell producing degree and other problems in the dual horizontal-well SAGD with conventional steam cycle preheating,laboratory test and numerical simulation were combined to understanding the technical principle and adaptability of solvent-assisted SAGD preheating startup technology.Research indicates that the solvent-assisted SAGD is featured by small preheating cycle,low steam consumption and uniform interwell connectivity,which is applicable for the super-heavy oil reservoirs with permeability between lateral sections not less than 500 mD,oil saturation not less than 60%and the crude oil viscosity from 2.0×10^4 mPa·s to 10.0×10^4 mPa·s at 50℃.The reservoir screening principles could provide certain reference for other heavy oil reservoirs to implement solvent-assisted SAGD startup technology.

关 键 词：溶剂辅助 SAGD 启动阶段 井间连通 超稠油油藏 

分 类 号：TE345[石油与天然气工程—油气田开发工程]