Comparison of Nitrogen Gas and Thermal-Insulation Liquid to Control the Temperature-Pressure Effect in Deep Gas Well

Bo Zhang; Lihu Cao; Nu LuBo ZouJunfeng XieCheng LiWenming WangHai ZhongWei FanYushan ZhengJinrui Deng

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Comparison of Nitrogen Gas and Thermal-Insulation Liquid to Control the Temperature-Pressure Effect in Deep Gas Well

机译：Comparison of Nitrogen Gas and Thermal-Insulation Liquid to Control the Temperature-Pressure Effect in Deep Gas Well

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摘要

Thermal-insulated liquid and nitrogen gas are two common methods to control the trapped annular pressure caused by the temperature-pressure effect, but few researches analyzed the control performance of these two measures applied in the deep gas well. Therefore, this paper builds a model to compare the control performance and a safety factor is proposed to evaluate the control performance when the tubing is totally blocked. The results indicate that the tubing-casing annulus temperature difference creates the conditions for the trapped annular pressure. Only when the production rate exceeds a certain value, can the thermal-insulated liquid reduce the trapped annular pressure. The nitrogen gas can achieve good control performance after the nitrogen gas volume exceeds 0.03 regardless of the production time and the production rate. To avoid the tubing collapse risk, the annular pressure should be controlled under the critical value. However, the thermal-insulated liquid is not able to reduce the annular pressure to the critical value. The nitrogen gas can prevent tubing collapse under different liquid densities by suitable volume. Therefore, the nitrogen gas is recommend.

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来源
《Iranian Journal of Science》 |2023年第2期|389-400|共12页
作者
Bo Zhang; Lihu Cao; Nu LuBo ZouJunfeng XieCheng LiWenming WangHai ZhongWei FanYushan ZhengJinrui Deng;
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作者单位

Research Institute of Safety and Environment Technology, CNPC, Beijing 102206, China;

Research Institute of Oil and Gas Engineering, Tarim Oilfield Petrochina, Korla, Xinjiang 841000, China;

Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, ChinaOil and Gas Field Productivity Construction Department of Tarim Oilfield Company, Petrochina, Korla, Xinjiang 841000, ChinaDrilling Technology Research Institute, SINOPEC Shengli Oilfield Service Corporation, Dongying 257000, ChinaInternational Engineering Company of CNPC Xibu Drilling Engineering Company Limited, Urumqi, Xinjiang 830000, ChinaSafety, Environment and Technology Supervision Research Institute of PetroChina Southwest Oil and Gas Field Company, Chengdu 610041, China;

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正文语种英语
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关键词
Deep gas well; Temperature-pressure effect; Control performance; Thermal insulation; Nitrogen gas;

Comparison of Nitrogen Gas and Thermal-Insulation Liquid to Control the Temperature-Pressure Effect in Deep Gas Well

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