Thermal stimulation is a common measure used to improve the decomposition efficiency of natural gas hydrate. However, the conventional thermal stimulation methods require considerable investments in wellbore construction. According to the penetration mechanism of the torpedo anchor, the self-entry energy compensation device (ECD) is innovatively proposed to replace the existing wellbore platform. The principle and critical technologies of the ECD are described and analyzed in detail. Then, a penetration model and an exploitation model are developed using the reservoir data from the W17 station in the Shenhu sea area, and the main conclusions are: It takes about 4 s for the ECD to penetrate from the overburden layer to the reservoir, and its penetration depth is about 50.1–370.4 m, which covers the buried depth of most marine reservoirs. Nevertheless, the combined depressurization + thermal stimulation method is unsuitable for the Shenhu reservoir due to the low permeability, low thermal conductivity, and high initial temperature. Overall, the ECD can provide a new idea for developing the NGH thermal stimulation method to solve the Joule-Thomson effect and seawater freezing problems during the depressurization production.

热刺激是提高天然气水合物分解效率的常用措施. 然而，传统的热增产方法需要对井筒建设进行大量投资。根据鱼雷锚的穿透机理，创新性提出了自入式能量补偿装置（ECD）替代现有井筒平台。对ECD的原理和关键技术进行了详细的描述和分析。然后，利用神狐海域W17站的油藏资料，建立了渗透模型和开发模型，主要结论是：ECD从覆盖层渗透到油藏大约需要4 s，其穿透深度约为50.1～370.4 m，覆盖了大部分海相油藏的埋深。尽管如此，联合降压 + 热改造法不适合神狐油藏，渗透率低、热导率低、初始温度高。总体而言，ECD可以为开发NGH热增产方法解决减压生产过程中的焦耳-汤姆逊效应和海水冻结问题提供新思路。