| 煤炭地下气化注入井压力控制 |
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| 引用本文： | 张友军,杨鹏飞,刘家炜,毛良杰,袁进平,付燈煌.煤炭地下气化注入井压力控制[J].科学技术与工程,2023,23(35):15036-15043. |
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| 作者姓名： | 张友军 杨鹏飞 刘家炜 毛良杰 袁进平 付燈煌 |
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| 作者单位： | 中石油江汉机械研究所有限公司;西南石油大学 油气藏地质与开发国家重点实验室 |
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| 基金项目： | 中国石油天然气集团公司科学研究与技术开发项目“煤炭地下气化关键技术研究与先导试验”:子课题“地下气化井下作业装备研究与应用”(2019E-2504)、子课题“先导试验方案与风险评价”(2019E-2506)；国家自然科学基金(52174006)；四川省重点研发项目(21ZDYF3109,21SYSX0054)。 |
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| 摘 要： | 煤炭地下气化具有煤炭清洁利用和低碳能源保障的优势，是煤炭清洁转化技术创新战略方向。而压力是影响煤炭气化的重要因素，为使煤炭气化在地下高效安全进行，需要对注入井的压力进行控制研究。为了实现对注入井压力的控制，本文建立了气化剂注入的流量压力仿真模型，对水力摩阻的部分影响因素进行分析，并调整生产参数，进行了压力控制研究。研究结果表明:（1）水力摩阻随井筒直径的增大而减小；水力摩阻随连续油管外径的增大而增大；水力摩阻随注水排量的增大而增大。（2）在10 MPa注入压力下调整环空中的注水排量由5.50 L/s改变为5.75 L/s时，井底压力由7.26 MPa降至6.11 MPa。（3）当在8 MPa注入压力下调整连续油管中的注氧量由594.44 L/s改变为629.37 L/s时，井底压力由8.91 MPa降至8.87 MPa。（4）在8 MPa注入压力下调整生产井粗煤气的产出流量由800 L/s改变为900 L/s时，井底压力由8.94 MPa降至8.63 MPa。研究结果可为注入井的压力控制提供一定的指导。
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| 关 键 词： | 煤炭 地下气化 注入井 井筒压力 |
| 收稿时间： | 2023/2/6 0:00:00 |
| 修稿时间： | 2023/9/20 0:00:00 |
Research on pressure control of underground coal gasification injection well |
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| Zhang Youjun,Yang Pengfei,Liu Jiawei,Mao Liangjie,Yuan Jinping,Fu Denghuang.Research on pressure control of underground coal gasification injection well[J].Science Technology and Engineering,2023,23(35):15036-15043. |
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| Authors: | Zhang Youjun Yang Pengfei Liu Jiawei Mao Liangjie Yuan Jinping Fu Denghuang |
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| Institution: | Jianghan Machinery Research Institute Limited Company of CNPC,Hubei,Wuhan;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Sichuan,Chengdu |
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| Abstract: | Underground coal gasification has the advantages of clean utilization of coal and low carbon energy guarantee, and it is the strategic direction of clean coal transformation technology innovation. Pressure is an important factor affecting coal gasification. In order to make coal gasification underground efficiently and safely, it is necessary to control the pressure of injection wells. In order to control the injection well pressure, the flow pressure simulation model of gasifier injection is established in this paper, and the influence factors of hydraulic friction are analyzed, and the production parameters are adjusted to study the pressure control. The results show that: (1) the hydraulic friction decreases with the increase of wellbore diameter. The hydraulic friction increases with the increase of coiled tubing diameter. The hydraulic friction increases with the increase of water injection discharge. (2) Under the injection pressure of 10 MPa, the bottom hole pressure decreased from 7.26 MPa to 6.11 MPa when the injection displacement of water in the adjusted annulus was changed from 5.50 L/s to 5.75 L/s. (3) Under 8 MPa injection pressure, the bottom hole pressure decreased from 8.91 MPa to 8.87 MPa when the oxygen injection in coiled tube was adjusted from 594.44 L/s to 629.37 L/s. (4) Under the injection pressure of 8 MPa, the bottom hole pressure is reduced from 8.94 MPa to 8.63 MPa when the output flow of crude gas is adjusted from 800 L/s to 900 L/s. The research results can provide some guidance for pressure control of injection well. |
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| Keywords: | Coal Underground gasification Injection well Wellbore pressure |
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