考虑蒸汽热损失的稠油热采Blasingame产量递减曲线  

Blasingame Decline-curve Analysis for Heavy-oil Thermal Recovery with Steam-heat Loss

作　　者：贾永禄[1] 秦明[1] 聂仁仕[1] 贾金伟[2] 周兴燕 周贤宗 汪洋松 唐成瑞 

机构地区：[1]油气藏地质及开发工程国家重点实验室/西南石油大学,成都610500 [2]中国石油新疆油田分公司勘探开发研究院,克拉玛依834000 [3]中国石油新疆油田分公司采气一厂,克拉玛依834000 [4]西南油气田公司川西北气矿双流采气作业区,成都610213

出　　处：《世界科技研究与发展》2016年第2期254-258,共5页World Sci-Tech R&D

基　　金：国家自然科学基金青年科学基金(51304164);四川省科技厅基础研究项目(2015JY0132);高等学校博士学科点专项科研基金新教师类资助课题(20135121120001)资助

摘　　要：以往Blasingame产量递减典型曲线都未考虑热损失对曲线的影响,而在稠油热采过程中蒸汽热损失难以避免,忽略蒸汽热损失明显不符合实际情况。针对稠油热采,建立考虑蒸汽热损失的产量递减分析理论模型。利用拉普拉斯变换、特征函数等现代数学方法对模型进行求解,得到拉普拉斯空间中的井底压力表达式,然后求得定井底压力条件下的产量变化解式。利用数值反演,绘制了考虑热损失的定压生产不稳定流动产量曲线和Blasingame产量递减典型曲线。通过分析蒸汽冷凝系数对不稳定流动产量曲线和Blasingame产量递减典型曲线的影响发现,蒸汽热损失对稠油产量影响很大,蒸汽热损失越大,产量越小,在实际生产过程中不能忽略蒸汽热损失的影响,否则会产生较大的误差。热油带半径、流度比以及储容比对Blasingame产量递减曲线早期阶段也会产生较大的影响,Blasingame产量递减曲线随各参数的变化而变化。The former Basingame decline-curve analysis in current literatures neglected the effect of heat loss in heavy-oil thermal recovery（ inevitable in field）,which is not in accordance with reality. A theoretical model of decline analysis for thermal recovery of heavy oil,accounting for the steam-heat loss,is established. Based on this analytical model,the expression of bottom-hole pressure in Laplace space can be solved with using modern mathematical methods such as Laplace transformation,characteristics,etc.,followed by solving the yield expression with fixed bottom-hole pressure. Numerical inversion could allow one plotting production curve of unstable flow at fixed bottom-hole pressure and Blasingame yield decline curve,both of which consider heat loss. After analysing the influence of steam-condensation coefficient on both aforementioned curves,it is shown that steam-heat loss has a significant effect on heavy-oil production,and the larger the steam-heat loss,the lower the oil yield. Therefore,the effect of steam-heat loss on oil production can＇t be ignored in field development,otherwise,this will lead great error between analytical and actual production. Some other factors,for instance radius for warm oil zone,mobility ratio,and storability,also impose an important impact on the earlier Blasingame decline curve,causing the Blasingame decline curve to change with varying parameters.

关 键 词：稠油 两区复合油藏 热损失 产量递减 Blasingame典型曲线 

分 类 号：TE345[石油与天然气工程—油气田开发工程]