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Deployment and Exploration of a Gas Storage Well Pattern Based on the threshold radius

Acta Geologica Sinica(English Edition) 2021年第2期95卷 630-637页

作者： TANG Ligen ZHU Weiyao ZHU Huayin SUN Chunhui YANG Fenglai WANG Yan Li Xiaorui Li Haiming CHU Guangzhen WANG Jieming KONG Debin YUE Ming LIU Yuwei HUANG Kun University of Science and Technology Beijing Beijing 100083China Research Institute of Petroleum Exploration and Development CNPCBeijing 100083China Petro China Liaohe Oilfield Company PanjinLiaoning 124000China Petro China Tarim Oilfield Company KorlaXinjiang 841000China Petro China Southwest Oil and Gas Field Company Chongqing 401121China

To tackle the problem that wells that are deployed in a specific pattern based on the requirements of gas reservoir development are not suitable for gas storage,we have conducted concentrically circular injection and production simulation experiments for gas storage,discovered the existence of a threshold radius,denoted by Rt,and derived the expression for *** on the analysis and discussion results,we propose a strategy for deploying gas storage wells in specific *** expression for Rt shows that it is affected by factors such as the gas storage gas production/injection time,the upper pressure limit,the lower pressure limit,the bottomhole flow pressure at the ends of injection and production,the and *** analysis and discussion results show that the Rt of a gas storage facility is much smaller than the Rt for gas reservoir *** the gas storage facilities in China,the Rt for gas production is less than the Rt for the gas injection,and Rt increases with the difference in the operating pressure and with permeability *** on the characteristics of Rt,we propose three suggestions for gas storage well pattern deployment:(1)calculate Rt according to the designed functions of the gas storage facility and deploy the well pattern according to Rt;(2)deploy sparser,large-wellbore patterns in high-permeability areas and denser,small-wellbore patterns in high-permeability areas;and(3)achieve the gas injection well pattern by new drilling,and the gas production well pattern through a combination of the gas injection well pattern and old *** assessing a gas storage facility with a perfect well pattern after a number of adjustments,we found that the Rt of the 12 wells calculated in this paper is basically close to the corresponding actual radius,which validates our *** results of this study provide a methodological basis for well pattern deployment in new gas storage construction.

关键词： gas storage well deployment strategy gas injection well pattern gas production well pattern threshold radius

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