A N ew Mode l of Est imating R ecoverableR eserves of Solution Gas
作者
丁良成
Authors
D ing L iangcheng
单位
(胜利油田有限公司地质科学研究院, 山东东营257015 )
Organization
Geologica l Scientific R esearch Institute, Shengli Oilfield Co. Ltd. , SINOPEC, Dongy ing 257015, China
摘要
在实际生产过程中, 由于储层非均质性, 以及开发后期为了控制含水的上升, 油
藏中局部地区的压力会降到饱和压力之下。对于这种驱动类型以水驱为主, 同时存在溶解气
驱的情况, 在预测溶解气可采储量时, 采用现行的累积产油量与累积产气量线性关系曲线法的
结果会偏大, 而利用累积产油量与累积生产气油比线性关系曲线法的结果会偏小。实际应用
表明, 基于衰减预测模型的方法结果可靠。
Abstract
Dur ing practica l production, due to hete rogene ity and contro l ascending of w ater cut latter ly, reservo ir pressurew ill be below bubble po int pressure lo ca lly. In the case that wa ter dr ive predom ina tes and depletion dr ive is secondary, the reserves forecasted by the linear re la tionsh ip between cum ulativ e o il production and cum ulativ e gas production is larg er than rea l recoverab le so lution g as, bu t the rese rves forecasted by the re lationship betw een cum ulative oil production and cum ulative g as- o il ratio is sma ller than rea l recoverab le so lution g as. On the basis o f a ttenuation m ode,l a new mode l is put forw ard, wh ich applies to the case that producing o il- gas ratio descend decreasing ly. The practica l application indicates that the new mode l is re liable.
关键词：
溶解气; 可采储量; 预测模型;
Keywords:
So lution gas, Recoverab le reserves, Predicting model;
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