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

作　　者：MA Xinhua ZHENG Dewen DING Guosheng WANG Jieming 

机构地区：[1]PetroChina Research Institute of Petroleum Exploration and Development,Beijing 100083,China [2]CNPC Key Laboratory of Oil&Gas Underground Storage Engineering,Langfang 065007,China

出　　处：《Petroleum Exploration and Development》2023年第2期419-432,共14页石油勘探与开发（英文版）

基　　金：Supported by the PetroChina Scientific Research and Technology Development Project (2022DJ83)。

摘　　要：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：underground gas storage gas-storage geological body maximum pressure-bearing maximum well production capacity maximum peak shaving capacity extreme utilization theory multi-cycle relative permeability hysteresis 

分 类 号：TE972.2[石油与天然气工程—石油机械设备]