过热蒸汽SAGD循环预热模拟及方案优化  

Simulation and scheme optimization of using superheated steam for circulating preheating in SAGD

作　　者：林日亿[1] 郭彬 李轩宇 杨勇 韩飞[1] 王新伟[1] 张建亮 LIN Riyi;GUO Bin;LI Xuanyu;YANG Yong;HAN Fei;WANG Xinwei;ZHANG Jianliang(College of New Energy in China University of Petroleum(East China), Qingdao 266580, China;Liaohe Thermal Mining Machinery Manufacturing Branch of CNPC Bohai Petroleum Equipment Manufacturing Company Limited, Panjin 124209, China;New Energy Development Center of Shengli Petroleum Administration Company Limited, SINOPEC, Dongying 257000, China)

机构地区：[1]中国石油大学(华东)新能源学院,山东青岛266580 [2]中国石油集团渤海石油装备制造有限公司辽河热采机械制造分公司,辽宁盘锦124209 [3]中国石化集团胜利石油管理局有限公司新能源开发中心,山东东营257000

出　　处：《中国石油大学学报（自然科学版）》2021年第3期118-126,共9页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家自然科学基金项目(51874333);十三五国家科技重大专项子课题(2016ZX05012-002-005);中央高校基本科研业务费专项(19CX02014A)。

摘　　要：预热效果好坏是影响稠油蒸汽辅助重力泄油(SAGD)开发技术的一项重要因素。在蒸汽返回水平段靶点A时蒸汽干度≥0条件下,研究馆陶组H71区块循环预热技术。结合油藏地质参数和物性参数建立地质模型,利用CMG油藏数值模拟软件进行历史拟合,对比等注汽量和等注汽热焓两种预热方案。结果表明馆陶H71区块采用注入井定注汽量、生产井定产液量目标开展的历史拟合符合率为97.8%;循环预热9个月之后,杜84-馆H71-1和杜84-馆H71-2两口水平井之间已基本形成有效热连通,温度场位于80~100℃,地层压力降至3 MPa,已达到转SAGD的较佳时机;注汽量80 m^(3)/d、过热度61℃(注汽压力6.7 MPa)的过热蒸汽井间平均温度达到90℃所用的时间最少,预热效果最好;在SAGD生产阶段,注气量相同的条件下,注入过热蒸汽相较于注入湿蒸汽,日产油量与累积产油量明显增加,含水率降低,在SAGD生产前期效果更明显。The preheating effect is an important factor to affect the development of SAGD.The study on circulating preheating technology is carried out on H71 block of Guantao.The target working condition is that the steam dryness is bigger or equal to 0 and the steam returns to the vicinity of the production wellhead(point A).In this study we established the reservoir geological model combined with reservoir fluid model and physical parameters,and then we used CMG to compare the schemes of circulating preheating between the same gas injection rate and the same enthalpy on the basis of history matching.The results show that,the historical fitting rate in block H71 of Guantao formation was 97.8%,which sets the same steam injection volume in the injection well and liquid production rate in the production well.After 9 months of cyclic preheating,the effective thermal connection had been basically formed between two horizontal wells of Guan H71-1 and H71-2 in block Du 84,where the temperature had been between 80℃to 100℃and the formation pressure had dropped to 3 MPa around,it reached the good chance for SAGD.Comparing the two schemes,it was more economic that the steam injection rate was 80 m^(3)/d and degree of superheat was 61℃(pressure 6.7 MPa),where the average temperature reaching 90℃was quicker between superheated steam wells.In the SAGD production stage,compared with the injection of wet steam,the daily oil production and cumulative oil production are significantly increased by injecting the superheated steam,and the water content is reduced,which has a more significant effect in the early stage of SAGD production.

关 键 词：过热蒸汽 蒸汽辅助重力泄油技术 循环预热 数值模拟 方案优化 

分 类 号：TE345[石油与天然气工程—油气田开发工程]