复杂类型储气库多周期注采相渗变化规律  

Variation of Relative Permeability during Multi-cycle Injection-Production of Complex Reservoir Gas Storage

作　　者：唐康 廖新维[1] 闵忠顺[2] 李滨[2] 高旺来 董鹏 TANG Kang;LIAO Xinwei;MIN Zhongshun;LI Bin;GAO Wanglai;DONG Peng(State Key Laboratory of Petroleum Resources and Prospecting,China Univesity of Petroleum(Beijing)Beijing 102249,China;Exploration and Development Research Institute,Liaohe Oilfield Company,Panjin,Liaoning 124010,China)

机构地区：[1]中国石油大学(北京)油气资源与探测国家重点实验室,北京102249 [2]辽河油田勘探开发研究院,辽宁盘锦124010

出　　处：《西安石油大学学报（自然科学版）》2023年第3期81-87,共7页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家科技重大专项资助项目(2017ZX05009004-005);国家自然科学基金资助项目(52074322,U762210)。

摘　　要：为了明确复杂油藏型储气库建库及多周期注采运行过程中气水、气油相渗曲线变化规律,采用非稳态测试方法开展了储气库天然岩心多周期相渗实验,分析了多周期注采对油、气、水相对渗透率的影响,并建立了多周期气水、气油相渗曲线模型。研究表明:在多周期相渗实验中,气相和油相呈现出周期性滞后效应,其中气相相对渗透率逐渐降低,油相相对渗透率逐渐升高,而水相相对渗透率变化较小;此外,伴随注采周期增加,束缚水饱和度降低,残余气饱和度增加,残余油饱和度逐渐降低,因此多周期注采有利于储气库排液扩容,但是同时伴随气体损失,其可动用库存量会减少。在此实验数据基础上,建立了储气库多周期注采气水、气油相渗曲线模型,并绘制了相应图版,可为储气库数值模拟和库容参数计算提供参考。To clarify the change of gas-water and gas-oil relative permeability curves during the construction and multi-cycle injection and production of the gas storage with complex reservoir,the multi-cycle injection and production relative permeability experiments of the natural cores from the gas storage were carried out by unsteady state test method,the influences of multi-cycle injection and production on the relative permeability of oil,gas and water phase were analyzed,and the gas-water and gas-oil relative permeability curve models in multi-cycle injection and production were established.The results show that:in multi-cycle injection and production relative permeability experiments,both gas and oil phases show periodic relative permeability hysteresis.With the increase of injection-production cycle,the relative permeability of gas phase gradually decreases,the relative permeability of oil phase increases,while the relative permeability of water phase is basically unchanged;the saturation of irreducible water and residual oil decreases,and the saturation of residual gas increases.Therefore,the multi-cycle injection and production is beneficial to the expansion of gas storage capacity,but at the same time,the available capacity decreases with the loss of gas.On the basis of the experimental data,the multi-cycle injection-production gas-water and gas-oil relative permeability curve charts of the gas storage were drawn,which can provide a reference for the numerical simulation of the gas storage and the calculation of the storage capacity parameters.

关 键 词：地下储气库 多周期注采 相渗滞后 相渗模型 

分 类 号：TE972[石油与天然气工程—石油机械设备]