Reservoir Stimulation Technologies for Natural Gas Hydrate: Research Progress, Challenges, and Perspectives

Ma, Kun; Li, Dongliang; Liang, Deqing

doi:10.1021/acs.energyfuels.3c01464

Cited by 6 publications

(3 citation statements)

References 132 publications

(174 reference statements)

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“…The position, depth, and spacing of fractures can be precisely controlled during the construction process. Furthermore, it is convenient to modify the permeability and mechanical properties of fractures by adjusting the composition of water jets, and the reservoir’s stability is typically less influenced …”

Section: Introductionmentioning

confidence: 99%

Enhancement of Gas Production from Class 1-Type Hydrate Reservoirs with High-Pressure Rotating Water Jets in Horizontal Well Depressurization Production

Wan,

Chen,

et al. 2024

Energy Fuels

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Reservoir stimulation technology is important for improving the gas production efficiency of natural gas hydrate exploitation. Based on the data of the first natural gas hydrate field test in the Shenhu Sea area, the gas production capability of Class 1-type hydrate reservoirs was numerically evaluated by horizontal well depressurization with high-pressure rotating water jets (HPRWJ). The results showed that the HPRWJ can effectively improve the production efficiency. The mechanism is enlarging the drainage area and improving the seepage conditions of the reservoir. With the wellbore deployed at the middle part of the three-phase layer, compared with the unstimulation case, the case with HPRWJ results in the V g increased by 140.65% after 1080 days of production with a length of 300 m and the stimulation parameters: Q (quantity), R (radius), S (spacing), W (width), K (permeability), and P (porosity) were set to 25, 5.5 m, 11.5 m, 0.5 m, 5 D, and 0.7, respectively. With comprehensive parameter analysis, the results show that the stimulation zone quantity and radius are the main control parameters for improving production efficiency, and the permeability and porosity had less effect. It is suggested to use low density with a large radius when adopting HPRWJ, which can save construction time and costs.

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Section: Introductionmentioning

confidence: 99%

Enhancement of Gas Production from Class 1-Type Hydrate Reservoirs with High-Pressure Rotating Water Jets in Horizontal Well Depressurization Production

Wan,

Chen,

et al. 2024

Energy Fuels

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“…The current methods of hydrate reservoir modification include hydraulic fracturing, jet breaking, overlying layer modification, and split grouting (Bai et al, 2023;Liu et al, 2020;Ma et al, 2023;Ren et al, 2022b;Du et al, 2023). As the main stimulation method for unconventional oil and gas, hydraulic fracturing is the main modification method for NGH reservoirs.…”

Section: Introductionmentioning

confidence: 99%

Consolidation-acidizing experiments on methane natural gas sediment skeleton

Xu,

Shen,

Wang

et al. 2024

Front. Energy Res.

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During the development of natural gas hydrates, it is important to ensure the stability of the reservoir. The hydrate reservoirs in the South China Sea are clayey silt sediments, which are prone to sand production and collapse during hydrate dissociation. This study innovatively proposes the idea of consolidation-acidizing for NGH reservoir modification. Based on the core parameters of well A drilling in the Shenhu Sea area of the South China Sea, NGH sediment skeleton samples were artificially prepared. Core sensitivity testing indicates that the NGH reservoir has the potential for acidizing modification. After using tetraethyl orthosilicate to solidify the sample, it was found that Young’s modulus of the sample increased by 58.8%, and the compressive strength increased by 54.78%. Although the porosity decreased by 39.33%, the pores were not completely blocked. After the acidizing experiment, the permeability of the consolidated sample was 2.88 mD, and the porosity increased by 10.63%; The permeability of the unconsolidated sample was 1.86 mD, and the porosity decreased by 10.73%. The CT scan images also showed that the pores of the sample after consolidation-acidizing developed uniformly without significant deformation; The unconsolidated sample undergoes severe deformation and sand production after acidizing. This study demonstrates that the consolidation-acidizing modification method is feasible in clayey silt hydrate reservoirs.

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“…Natural gas hydrate (NGH) is a clean energy source with enormous potential, widely regarded as an alternative energy source to oil and natural gas resources in future energy supply. − NGH is primarily a white, ice-like cage compound formed by methane and water with lower temperature and higher pressure conditions, which is widely distributed in nature, mainly found in seabed sediments and permafrost layers. − Due to the high energy density, nonpolluting combustion products, and large reserves of NGH, efforts have been made worldwide to extract NGH. − However, the formation conditions of NGH reservoirs are harsh, and there are many engineering and technical challenges and difficulties to successfully extract NGH. − During the drilling process, the decomposition of NGH is one of the key issues. When encountering NGH reservoirs during drilling, the friction between the drilling tools and the formation releases cutting heat, causing the drilling fluid temperature to exceed the equilibrium temperature of the NGH reservoir, leading to the decomposition of hydrates.…”

Section: Introductionmentioning

confidence: 99%

Hydrate Decomposition Inhibitors by Phase Change Cooling Storage Based on an Electrostatic Spraying Method

Guo,

Wang,

Liao

et al. 2024

Energy Fuels

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The heat transfer of drilling fluid to hydrate reservoir is the main cause of reservoir hydrate decomposition and borehole wall instability. Impeding or retarding heat transfer from drilling fluid to hydrate reservoir is key to maintaining reservoir hydrate stability. In order to intelligently control the temperature of the drilling fluid in the wellbore, phase change microcapsules were prepared using an innovative method of electrostatic spraying and physical cross-linking with mixed alkane as the core material and sodium alginate as the shell material. This synthesis method can control the particle size of phase change microcapsules. The phase change microcapsules were characterized by SEM, optical microscopy, and particle size analyzer. The experimental results presented that the latent heat of melting of the phase change material is 158.04 J/g, and the latent heat of solidification is 161.63 J/g. In addition, the microcapsules also have excellent thermal stability, and the thermal conductivity coefficient is 0.384 W/(m•°C). The results of the hydrate decomposition experiment show that the phase change microcapsules can effectively delay the decomposition of hydrates. These results provide valuable insights into a better understanding of the rational development of high-performance hydrate decomposition inhibitors for drilling fluids and the construction of drilling fluid systems.

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Reservoir Stimulation Technologies for Natural Gas Hydrate: Research Progress, Challenges, and Perspectives

Cited by 6 publications

References 132 publications

Enhancement of Gas Production from Class 1-Type Hydrate Reservoirs with High-Pressure Rotating Water Jets in Horizontal Well Depressurization Production

Enhancement of Gas Production from Class 1-Type Hydrate Reservoirs with High-Pressure Rotating Water Jets in Horizontal Well Depressurization Production

Consolidation-acidizing experiments on methane natural gas sediment skeleton

Hydrate Decomposition Inhibitors by Phase Change Cooling Storage Based on an Electrostatic Spraying Method

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