无热源感应多功能加热设备在深层页岩气开发中高效防冻堵的应用及适应性评价

Application of multifunctional heating equipment without heat-source response to efficiently anti freezing and block in deep shale-gas development and its adaptability evaluation

在当前国家提出节能减排、创建资源节约型环境友好型社会的前提下,研究无热源感应多功能加热设备在深层页岩气开发中高效防冻堵技术,对解决天然气开采过程中的安全和双碳减排问题具有重要意义。明确天然气冻堵形成机理,根据每口井的现场工况,制定出符合其条件的方案,制造出其适配的产品,为其量身订做,达到节能、高效、安全的防冻堵,做到资源利用最小化,安全系数最大化。研究结果表明:(1)无热源感应多功能加热设备是利用电磁感应的方法使被加热的材料的内部产生涡流,依靠这些涡流的能量达到加热目的;(2)在每1立方米掺水0.01 KG的情况下,纯净天然气压力每降低1 MPa气体温度下降4-5℃;(3)无热源感应多功能加热设备在深层页岩气防冻堵的过程中,是一种能量利用率和转化率极高的一项技术;(4)无热源感应多功能加热设备的频率控制、磁场方向确认、反向电压控制,是当前研究热点。(5)无热源感应多功能加热设备符合场站安全要求。结论认为:国家和企业应进一步加快该项技术在井口的防冻堵应用。

Under such circumstances that China proposes energy saving and emission reduction and constructs a resource-saving and environment-friendly society,making clear multifunctional heating equipment without heat-source response to implement anti freezing and block in deep shale-gas development is of great significance to ensure the safety and dual car-bon&emission reduction during natural-gas exploitation.So,we figured out origin mechanisms on both freezing and block of natural gas.Then,based on working conditions of each well,some available programs were prepared to manufacture matched products so as to achieve anti freezing and block with energy saving,efficiency and safety,further to minimize re-source utilization and maximize safety factors.Results show that(i)the multifunctional heating equipment without heat-source response creates a kind of vortex among the heated substances through an electromagnetic induction approach,and heating can be conducted dependent on vortex energy;(ii)for pure natural gas,its temperature drops 4-5℃with a decom-pression of 1 MPa when water of 0.01 kilogram per one cubic meter of natural gas;(iii)in the process of anti freezing and block in deep shale gas,this equipment boasts very high energy utilization and conversion;(iv)frequency control,affirming magnetic field direction and reverse voltage control involved in the equipment are hot spots at present;and(v)the multi-functional heating equipment without heat-source response meets requirements on station security.It is concluded that our country and firms should further accelerate its application to anti freezing and block at wellbore.