复杂地质条件储气库“极限动用”理论与实践  

“Extreme utilization”theory and practice in gas storages with complex geological conditions

作　　者：马新华[1,2] 郑得文 丁国生[1,2] 王皆明 MA Xinhua;ZHENG Dewen;DING Guosheng;WANG Jieming(PetroChina Research Institute of Petroleum Exploration and Development,Beijing 100083,China;CNPC Key Laboratory of Oil&Gas Underground Storage Engineering,Langfang 065007,China)

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]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,河北廊坊065007

出　　处：《石油勘探与开发》2023年第2期373-383,共11页Petroleum Exploration and Development

基　　金：中国石油天然气集团有限公司科学研究与技术开发项目“地下储气库基础理论与扩容新方法研究”(2022DJ83)。

摘　　要：针对复杂地质条件储气库,基于20余年的运行实践,结合储气库系列攻关成果,揭示了储气地质体承压动力学机制,发现了“多轮相渗滞后”和“分区差异动用”气水互驱渗流规律,提出了以“储气库储气最多、井注入产出能力最大、空间利用效率最高”为目标的复杂地质条件储气库“极限动用”理论,形成了储气地质体极限承压、井极限产能、储气空间极限调峰能力三位一体的评价方法。实现了储气地质体在上限压力条件下获得最大储气空间(库容)、充分发挥地层-井筒气体流动协调的井极限产能以及满足有限时率不稳定渗流条件的最佳井网密度,获得下限压力条件下的最大调峰能力,达到安全和能力的双重极限效果。新疆呼图壁、西南相国寺、辽河双6等地下储气库的运行实践证明,“极限动用”理论有力推动了中国储气库业务高质量发展。Based on more than 20-year operation of gas storages with complex geological conditions and a series of research findings,the pressure-bearing dynamics mechanism of geological body is revealed.With the discovery of gas-water flowing law of multi-cycle relative permeability hysteresis and differential utilization in zones,the extreme utilization theory targeting at the maximum amount of stored gas,maximum injection-production capacity and maximum efficiency in space utilization is proposed to support the three-in-one evaluation method of the maximum pressure-bearing capacity of geological body,maximum well production capacity and maximum peak shaving capacity of storage space.This study realizes the full potential of gas storage(storage capacity)at maximum pressure,maximum formation-wellbore coordinate production,optimum well spacing density match with finite-time unsteady flow,and peaking shaving capacity at minimum pressure,achieving perfect balance between security and capacity.Operation in gas storages,such as Hutubi in Xinjiang,Xiangguosi in Xinan,and Shuang6 in Liaohe,proves that extreme utilization theory has promoted high quality development of gas storages in China.

关 键 词：地下储气库 储气地质体 极限承压 井极限产能 极限调峰 极限动用理论 多轮相渗滞后 

分 类 号：TE122.3[石油与天然气工程—油气勘探]