蒸汽辅助重力泄油改善汽腔发育均匀性物理模拟  

Physical simulation of improving the uniformity of steam chamber growth in the steam assisted gravity drainage

作　　者：马德胜[1,2] 郭嘉[3] 昝成[1,2] 王红庄[1,2] 李秀峦[1,2] 史琳[3] 

机构地区：[1]提高石油采收率国家重点实验室 [2]中国石油勘探开发研究院 [3]清华大学热科学与动力工程教育部重点实验室

出　　处：《石油勘探与开发》2013年第2期188-193,共6页Petroleum Exploration and Development

基　　金：国家科技重大专项"稠油/超稠油开发关键技术"(2011ZX-05012)

摘　　要：针对双水平井蒸汽辅助重力泄油(SAGD)蒸汽腔沿水平井长方向欠均匀发育的问题,以国内某油田SAGD先导试验区为原型,设计了一套高温高压双水平井双管柱SAGD三维比例物理模型,对影响SAGD过程的重要油藏参数和操作参数进行了相似比例模化,利用高温高压物理模型进行了3组SAGD蒸汽腔发育实验。实验1:模拟现场趾端处汽腔发育迟缓,汽腔沿井长欠均匀发育的现象;实验2:在实验1的基础上采取注汽井长短管协同注汽-生产井长短管协同采油的调控策略;实验3:在实验1的基础上采取U型井SAGD调控策略。实验结果表明:两种调控策略均能使趾端附近发育缓慢的汽腔恢复发育,对于改善汽腔沿井长方向发育均匀性均有较好效果,调控后产油速率明显提高。In steam assisted gravity drainage （SAGD） process, there is an uneven distribution of steam chamber growth along the whole length of the horizontal well. In order to solve this problem, a three-dimensional physical model of a high-temperature and high-pressure SAGD well pair was built. Several significant reservoirs and operation parameters for SAGD were also scaled in the model size, which was based on SAGD pilot development of a typical reservoir in China. Three experiments were conducted using the above-mentioned high-temperature and high-pressure physical model. Test 1 simulated the slow steam chamber growth at the toe end and uneven distribution of steam chamber growth. Test 2 tested the regulation strategy with dual tubing strings to adjust the steam chamber based on Test 1-combining the long and short tubing strings for injection well and production well. Test 3 tested the regulation strategy with U-shape wellbore to adjust the steam chamber. The results showed that the two regulation strategies were effective for recovering steam chamber growth at the toe end and making steam chamber growth uniform along the length of SAGD wellbore. After regulating, the oil rate increased significantly.

关 键 词：蒸汽辅助重力泄油(SAGD) 高温高压 三维比例物理模拟 汽腔发育 

分 类 号：TE357.44[石油与天然气工程—油气田开发工程]