气藏型储气库空间动用规律及扩容机理仿真模拟  

Simulation of pore space production law and capacity expansion mechanism of underground gas storage

作　　者：刘涛 李宜强[1,2] 丁国生 王正茂[5] 石磊[3,4] 刘哲宇 汤翔 曹涵[1,2] 曹金鑫 黄友晴 LIU Tao;LI Yiqiang;DING Guosheng;WANG Zhengmao;SHI Lei;LIU Zheyu;TANG Xiang;CAO Han;CAO Jinxin;HUANG Youqing(State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum(Beijing),Beijing 102249,China;Petroleum Engineering Institute,China University of Petroleum(Beijing),Beijing 102249,China;PetroChina Research Institute of Petroleum Exploration&Development,Beijing 100083,China;CNPC Key Laboratory of Oil&Gas Underground Storage Engineering,Beijing 100083,China;PetroChina Exploration&Production Company,Beijing 100120,China)

机构地区：[1]油气资源与探测国家重点实验室(中国石油大学(北京)),北京102249 [2]中国石油大学(北京)石油工程学院,北京102249 [3]中国石油勘探开发研究院,北京100083 [4]中国石油天然气集团有限公司油气地下储库工程重点实验室,北京100083 [5]中国石油勘探与生产分公司,北京100120

出　　处：《石油勘探与开发》2022年第6期1227-1233,共7页Petroleum Exploration and Development

基　　金：国家自然科学基金(52074318);中国石油天然气股份有限公司重点科技攻关项目“气藏型储气库动态试井分析新技术研究”(kt2020-16-01)。

摘　　要：采用一维长岩心和大型二维平板岩心模型开展了一维注气建库、单轮次注采模拟实验与二维平板岩心建库、多轮次注采模拟实验,研究了储集层物性、注采平衡时间等对储集层孔隙动用效率、有效库容形成及达容周期等的影响。研究表明:储集层物性、地层含水饱和度是影响气藏型储气库建库和运行的主要因素。气藏型储气库建库达容及运行过程中,储集空间可划分为高效、低效和无效3类工作区,储集层渗透率越高,孔隙动用效率越高,无效工作区越小或不存在无效工作区,注入气的损失越小,利用率越高。储集层物性越好,储集空间越大,最终形成的库容量越大。储集层含水饱和度越高,储气库建库达容及运行过程中气体损失越多,优化注采驱替排水,降低含水饱和度是减少储气库气量损失的有效途径。多轮次注采过程中,注采平衡时间存在合理区间,超过该合理区间,继续延长注采平衡期对储气库扩容贡献不大。One-dimensional gas injection storage building and one-cycle injection-production modeling experiment,and two-dimensional flat core storage building and multi-cycle injection-production modeling experiment were carried out using one-dimensional long core and large two-dimensional flat physical models to find out the effects of reservoir physical properties and injection-production balance time on reservoir pore utilization efficiency,effective reservoir capacity formation and capacity-reaching cycle.The results show that reservoir physical properties and formation water saturation are the main factors affecting the construction and operation of gas-reservoir type underground gas storage.During the construction and operation of gas-reservoir type gas storage,the reservoir space can be divided into three types of working zones:high efficiency,low efficiency and ineffective ones.The higher the reservoir permeability,the higher the pore utilization efficiency is,the smaller the ineffective working zone is,or there is no ineffective working zone;the smaller the loss of injected gas is,and the higher the utilization rate of pores is.The better the reservoir physical properties,the larger the reservoir space and the larger the final gas storage capacity is.The higher the water saturation of the reservoir,the more the gas loss during gas storage capacity building and operation is.Optimizing injection-production regime to discharge water and reduce water saturation is an effective way to reduce gas loss in gas storage.In the process of multiple cycles of injection and production,there is a reasonable injection-production balance time,further extending the injection-production balance period after reaching the reasonable time has little contribution to the expansion of gas storage capacity.

关 键 词：气藏型储气库 多轮次注采 注采平衡时间 孔隙动用效率 有效库容 

分 类 号：TE972[石油与天然气工程—石油机械设备]