In-situ temperature- and pressure-preserved sampler for marine natural gas hydrates: Principles, techniques, and field application

Abstract

Marine gas hydrates are highly sensitive to temperature and pressure fluctuations, and deviations from in-situ conditions may cause irreversible changes in phase state, microstructure, and mechanical properties. However, conventional samplers often fail to maintain sealing and thermal stability, resulting in low sampling success rates. To address these challenges, an in-situ temperature- and pressure-preserved sampler for marine applications has been developed. The experimental results indicate that the self-developed magnetically controlled pressure-preserved controller reliably achieves autonomous triggering and self-sealing, provides an initial sealing force of 83 N, and is capable of maintaining pressures up to 40 MPa. Additionally, a custom-designed intelligent temperature control chip and high-precision sensors were integrated into the sampler. Through the design of an optimized heat transfer structure, a temperature-preserved system was developed, achieving no more than a 0.3 °C rise in temperature within 2 h. The performance evaluation and sampling operations of the sampler were conducted at the Haima Cold Seep in the South China Sea, resulting in the successful recovery of hydrate maintained under in-situ pressure of 13.8 MPa and a temperature of 6.5 °C. This advancement enables the acquisition of high-fidelity hydrate samples, providing critical support for the safe exploitation and scientific analysis of marine gas hydrate resources.

Keywords

Marine resources / Natural gas hydrate / In-situ pressure-preserved sampling / In-situ temperature-preserved sampling / Deep-sea submersibles

Acknowledgments

This research was financially supported by Shenzhen Science and Technology Program (Nos. JSGG20220831105002005 and KJZD20231025152759002). Support from the National Natural Science Foundation of China (Nos. 52374357 and 523B2101) is also gratefully acknowledged. In addition, this research was funded by the Shared Voyages Project for Deep-sea and Abyss Scientific Research and Equipment Sea Trials of Hainan Deep-Sea Technology Innovation Center (No. DSTIC-GXHC-2022002).

References

[1] Xie HP, Gao MZ, Zhang R, Chen L, Liu T, Li CB, Li C, He ZQ. Study on concept and progress of in situ fidelity coring of deep rocks. Chin J Rock Mech Eng 2020; 39 (5):865-876. in Chinese.

[2] Xie HP, Gao F, Ju Y, Zhang R, Gao MZ, Deng JH. Novel idea and disruptive technologies for the exploration and research of deep earth. Adv Eng Sci 2017; 49(1):1-8. in Chinese.

[3] Xie HP, Liu T, Gao MZ, Chen L, Zhou HW, Ju Y, Gao F, Peng XB, Li XJ, Peng RD, Gao YN, Li C, He ZQ, Yang MQ, Zhao ZY. Research on in situ condition preserved coring and testing systems. Petrol Sci 2021; 18(6):1840-59.

[4] Hu YQ, Xie J, Xue SN, Xu M, Fu CH, He HL, Liu ZQ, Ma SM, Sun SQ, Wang CL. Research and application of thermal insulation effect of natural gas hydrate freezing corer based on the wireline-coring principle. Petrol Sci 2022; 19 (3):1291-304.

[5] Huang M, Wu LH, Ning FL, Wang JX, Dou XF, Zhang L, Liu TL, Jiang GS. Research progress in natural gas hydrate reservoir stimulation. Nat Gas Ind B 2023; 10 (2):114-29.

[6] Wei N, Bai RL, Zhou SW, Luo PY, Zhao JZ, Zhang Y, Xue J. China’s deepwater gas hydrate development strategies under the goal of carbon peak. Nat Gas Ind 2022; 42(2):156-165. in Chinese.

[7] Liao B, Wang JT, Li MC, Lv KH, Wang Q, Li J, Huang XB, Wang R, Lv XD, Chen ZX, Sun JS. Microscopic molecular and experimental insights into multi-stage inhibition mechanisms of alkylated hydrate inhibitor. Energy 2023;279:128045.

[8] Chen SY, Li ZS, Liang MJ, Tan SH, Shi YP, Chen ZX, Yang XY, Cai JH. Mechanisms of acid- and chelating agent-induced coal permeability response considering the stress sensitivity effect. Energy Fuels 2022; 36(24):14812-23.

[9] Chai MJ, Chen ZX, Nourozieh H, Yang M. Numerical simulation of large-scale seasonal hydrogen storage in an anticline aquifer: A case study capturing hydrogen interactions and cushion gas injection. Appl Energy 2023;334:120655.

[10] Wu NY, Li YL, Wan YZ, Sun JY, Huang L, Mao PX. Prospect of marine natural gas hydrate stimulation theory and technology system. Nat Gas Ind B 2021; 8 (2):173-87.

[11] Lin ZZ, Pan HP, Fang H, Gao WL, Liu DM. High-altitude well log evaluation of a permafrost gas hydrate reservoir in the Muli Area of Qinghai, China. Sci Rep 2018; 8(1):12596.

[12] Li C, Xie HP, Gao MZ, Chen L, Zhao L, Li CB, Wu NH, He ZQ, Li JN. Novel designs of pressure controllers to enhance the upper pressure limit for gas-hydrate-bearing sediment sampling. Energy 2021;227:120405.

[13] Wu C, Li HB, Yao YJ, Zhang HD, Liu DL, Wei JG. The project Mohole: A review and prospects. Acta Geol Sin 2022; 96(8):2657-69. in Chinese.

[14] Chai YC, Zhou ZY. Scientific ocean drilling: Achievements and prospects. Advance in Earth Science 2003;5:666-72.

[15] Kvenvolden KA, Barnard LA, Cameron DH. Pressure core barrel: Application to the study of gas hydrates, deep sea drilling project site 533, leg 76. Initial Reports of the DSDP 1983;76:367-75.

[16] Dickens GR, Paull CK, Wallace P. Direct measurement of in situ methane quantities in a large gas-hydrate reservoir. Nature 1997;385:426-8.

[17] Kubo Y, Mizuguchi Y, Inagaki F, Yamamoto K, Schultheiss P, Grigar K, Schultheiss P, Grigar K, Miller J. A new hybrid pressure-coring system for the drilling vessel Chikyu. Sci Drill 2014;17:37-43.

[18] Ruppel C, Boswell R, Jones E. Scientific results from Gulf of Mexico gas hydrates joint industry project leg 1 drilling: Introduction and overview. Mar Petrol Geol 2008; 25(9):819-29.

[19] Kawasaki M, Umezu S, Yasuda M. Pressure temperature core sampler (PTCS). J Jpn Assoc Petrol Technol 2006; 71(1):139-47.

[20] Shbailat SJ, Bouadila S. Solar stills design and evaluation: A comprehensive review. Babylon J Mech Eng 2025;2025:91-7.

[21] Hasan RA, Abdulqader MA, Alias AB, Hussein NA, Ahmed OK, Keighobadi J, Saleh AM. Advancements and performance of evaporative cooling technologies: Applications, benefits, and future prospects. Khwarizmia 2025;2025:30-41.

[22] Li SL, Cheng Y, Qin HW, Gu LY, Ye Y, Qiu MX. Development of pressure piston corer for exploring natural gas hydrates. J Zhejiang Univ Eng Sci 2006; 40 (5):888-92. in Chinese.

[23] Peng FF, Wang JL, Wan BY, Huang XJ, Tang YH, Peng DP. Design of the pressure-coring tool for underwater drilling rig. Drill Eng 2021; 48(4):97-103. in Chinese.

[24] Li XY, Li K, Zhang YQ, Wang ZG, Shi SS. Development of marine gas-hydrate pressure and temperature core sampler. Drill Prod Technol 2021; 44(3):72-5. in Chinese.

[25] Liu XL, Ruan HL, Zhao Y, Cai JP, Chen YL, Liang T, Li C, Liu HL, Deng DD. Progress in research and application of the pressure-temperature core sampler for marine natural gas hydrate. Drill Eng 2021; 48(7):33-39. in Chinese.

[26] Ren H, Pei XL, Wu ZH, Zhou GQ, Yang QZ, Xu JL. Development and field tests of pressure-temperature preservation coring tools for gas hydrate. Petrol Drill Tech 2018; 46(3):44-8. in Chinese.

[27] Zhu HY, Liu QY, Wong GR, Xiao XH, Zhu XH, Jiang ZL, Zhang DY. A pressure and temperature preservation system for gas-hydrate-bearing sediments sampler. Petrol Sci Technol 2013; 31(6):652-62.

[28] Sun YH, Liu DJ, Guo W, Jia R, Wang Y. The research on a sampling technology for gas hydrates by borehole bottom freezing and its freezing method. J Harbin Eng Univ 2013; 34(11):1460-4. in Chinese.

[29] Sun YH, Wang Y, Lü XS, Jia R, Guo W. Hole-bottom freezing method for gas hydrate sampling. J Nat Gas Sci Eng 2015;25:271-83.

[30] Xie HP, Hu YQ, Gao MZ, Chen L, Zhang R, Liu T, Gao F, Zhou HW, Peng XB, Li XJ, Zhu JB, Li CB, Peng RD, Gao YN, Li C, Li JN, He ZQ. Research progress and application of deep in situ condition preserved coring and testing. Int J Min Sci Technol 2023; 33(11):1319-37.

[31] Guo D, Chen L, Zhou ZY, Wang DM, Zhang YW, Yang X, Fang X, Wang XJ, Lu HP, Dai L, Xie HP. Development of a pressure coring system for the investigation of deep underground exploration. Int J Min Sci Technol 2023; 33(11):1351-64.

[32] Xue SN, He ZQ, Li C, Yu B, Lu XL, Liu WY, Yang JP, Wei ZJ. Physical and mechanical properties of thermal insulation materials for in situ temperature-preserved coring of deep rocks. Coal Geol Explor 2023; 51(8):30-38. in Chinese.

[33] Yang DS, Zhao ZY, Wu YF, Zhu LY, Lu JL, Liu T, Xie HP. A graphene-enhanced high-barrier and fast-curing film for deep in situ condition preserved coring in coal seams. Int J Min Sci Technol 2023; 33(11):1365-76.

[34] Li YH, Xie HP, Zhang R, Zhang ZT, Zhang ZL, Gao H, Huang W, Zhang JX, Gao JM, Ma X, Xu RB. Design and development of the deep-rock in situ condition-preserved coring calibration platform. Int J Min Sci Technol 2023; 33 (11):1377-95.

[35] He ZQ, Xie HP, Gao MZ, Chen L, Yu B, Hu YQ, Yang JP. Design and verification of a deep rock corer with retaining the in situ temperature. Adv Civ Eng 2020;2020:8894286.

[36] Yu B, He ZQ, Yang JP, Wei ZJ, Li C, Xie HP. Innovative design of a conductive center pole for an active thermal insulation and coring system in deep rock. Appl Sci 2023; 13(3):1242.

[37] Shi XJ, Xie HP, Li C, Li JN, Liu GK, You ZX, Gao MZ. Performance of a deep in situ pressure-preserving coring controller in a high-temperature and ultrahigh-pressure test system. J Rock Mech Geotech Eng 2025; 17(2):877-96.

[38] Shi XJ, Xie HP, Li C, Liu GK, Wei ZJ, Wang TY, Li J, Li QY. Influence of the mechanical properties of materials on the ultimate pressure-bearing capability of a pressure-preserving controller. Petrol Sci 2024; 21(5):3558-74.

[39] Guo D, Xie HP, Gao MZ, Li JN, He ZQ, Chen L, Li C, Zhao L, Wang DM, Zhang YW, Fang X, Liu GK, Zhou ZY, Dai L. In-situ pressure-preserved coring for deep oil and gas exploration: Design scheme for a coring tool and research on the in situ pressure-preserving mechanism. Energy 2024;286:129519.

[40] Li J, Li JN, Wang TY, Liu GK, He ZQ, Li C, Xie HP. Key techniques for precise measuring gas content in deep coal mine: In-situ pressure- and gas-preserved coring. Int J Min Sci Technol 2025; 35(4):589-670.

[41] Li J, Li JN, Wang TY, Shi XJ, Cui PF, Shang DL. Development and validation of a remotely triggered pressure- and gas-preserved coring tool for deep coal mines in drilling fluid environments. Adv Geo-Energy Res 2024; 14(2):147-60.

[42] Liu GK, Xie HP, Li C, You ZX, Shi XJ, Hu JJ, Gao MZ. Magnetically controlled self-sealing pressure-preserved coring technology. Petrol Sci 2024; 21(5):3464-81.

[43] Liu GK, Gao MZ, Yang ZW, Chen L, Fu MQ, Xie HP. The innovative design of deep in situ pressure retained coring based on magnetic field trigger controller. Adv Civ Eng 2020;2020:8873628.