Analysis of hydrate exploitation by a new in-situ heat generation method with chemical reagents based on heat utilization

Liu, Shu; Zhang, Yangyang; Luo, Yongjiang; Li, Bo

doi:10.1016/j.jclepro.2019.119399

Cited by 20 publications

(23 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the basis of the form of the heat supply, the thermal stimulation methods can be partitioned into traditional injection methods of thermal fluid (warm gas, steam, , hot water, , hot brine, , etc.) and in-situ heating methods (electric heating, self-heating system, in-situ combustion, etc.) through reference to the conventional process of oil-gas exploitation.…”

Section: Methods Of Gas Recovery From Hbsmentioning

confidence: 99%

“…In conclusion, the injection method of thermal fluid, a sort of traditional thermal stimulation method, cannot overcome such problems of high heat loss in the pipe/well and HBS, the small heating area limited by the low thermal conductivity of HBS, and low initial injectivity of fluids (or high resistance of the HBS to injected fluids) especially for HBS with ultralow permeability or without an underlying free phase layer. , Interestingly, at the very early period of injecting thermal fluid, the NGH reformation may still be observed at the fluid injection front (also known as the NGH dissociation front) before NGH dissociation by thermal stimulation, , which is attributed to the sharp increase in pressure mainly when a high injection rate is applied . Therefore, the NGH reformation still needs to be focused on during production via the traditional injection method of thermal fluid.…”

Section: Methods Of Gas Recovery From Hbsmentioning

confidence: 99%

“…The electrode-heating method needs a dual wellbore to produce Joule heat by mounting the positive and negative electrodes separately from some distance apart . Even so, the problem of high heat loss controlled by the low thermal conductivity of HBS remains unsettled . Moreover, the dynamic response laws of sediments resistivity during NGH dissociation and the influence of factors such as the structural composition and diagenesis degree of HBS on sediment resistivity are not clear, retarding the use of the electrode-heating method.…”

Section: Methods Of Gas Recovery From Hbsmentioning

confidence: 99%

“…For the gas recovery from HBS, a novel combined method with acid–base neutralization was first proposed by the Halliburton Energy Service Company in 1998 to effectively integrate the purpose of enhanced absolute permeability of HBS, in-situ thermal stimulation by hot brine, inhibitors generation, and gas replacement . Inspired by the integration idea, the feasibility study of hydrate exploitation by in-situ heat generation with the NH 4 Cl/NaNO 2 system was carried out (shown in Figure ) after the chemical reagents were selected from the chemical matching system from NH 4 Cl/NaNO 2 , CO(NH 2 ) 2 /NaNO 2 , CrO 3 /C 6 H 12 O 6 , and H 2 O 2 and comprehensively analyzing their reaction enthalpy, the corrosiveness of the reactants, composition, and concentration of chemical products, and economic efficiency . Theoretically, the self-heating system can effectively impose multiple stimuli on NGH mainly hosted in HBS and solve the aforementioned problems in DP employing permeability-increasing acidification, an in-situ heat supply, changing the NGH phase equilibrium conditions by saltwater, N 2 , and CO 2 replacement.…”

Section: Methods Of Gas Recovery From Hbsmentioning

confidence: 99%

See 3 more Smart Citations

Recent Advances in Methods of Gas Recovery from Hydrate-Bearing Sediments: A Review

et al. 2022

Self Cite

View full text Add to dashboard Cite

Safe, efficient, and economical gas recovery from hydrate-bearing sediments (HBS) is a severe issue that determines if natural gas hydrate (NGH), as an alternative energy in the future as fossil fuels approach depletion, is applied. Researchers worldwide are committed to developing a safe, efficient, and economical method of gas recovery from HBS. However, until now, most methods are still being validated and not have not been identified to exploit NGH commercially. Therefore, it is appropriate and significant to discuss researchers’ achievements to exploit NGH and summarize their potential benefits and challenges. This paper introduces nearly all the conventional and latest NGH exploitation methods and reviews field trials’ development characteristics. On the basis of laboratory experiments and field trials, key challenges restricting safe and efficient NGH development, and the existing research gaps reflecting these challenges, are also presented from the gas production, security, and economic aspects. The unfavorable situation mainly comprises the insufficient sensible heat, extremely low thermal conductivity, and ultralow permeability of HBS, lower gas production rate and its intense fluctuations, higher water-to-gas ratio (WGR), geological deformation, and subsidence of HBS attributed to excessive sand production, driving the consideration of some possible solutions. Given this, a new method for enhanced gas production from HBS based on the combination of depressurization (DP) and an in-situ heat generation method is proposed. Benefiting from multiple theoretical enhancement mechanisms such as replenishing energy to HBS with in-situ heat generation powders, cementing and strengthening the HBS skeleton, improving the gas permeability in HBS, decreasing the WGR based on blocking water, and removing gas characteristics of hydration products, this method could be expected to achieve promising long-term performance of gas production, which will be theoretically and practically significant to study commercial gas production.

show abstract

Section: Methods Of Gas Recovery From Hbsmentioning

confidence: 99%

Section: Methods Of Gas Recovery From Hbsmentioning

confidence: 99%

Section: Methods Of Gas Recovery From Hbsmentioning

confidence: 99%

Section: Methods Of Gas Recovery From Hbsmentioning

confidence: 99%

See 2 more Smart Citations

Recent Advances in Methods of Gas Recovery from Hydrate-Bearing Sediments: A Review

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…There are many kinds of thermal injection, including hot water injection, − electric heating, , in situ heat generation, , and geothermal . The modes of heat injection include continuous heating, repeated heating, and pulse heating…”

Section: Thermal Stimulate Combined Co2 Replacement (T-r Method)mentioning

confidence: 99%

Review on Enhanced Technology of Natural Gas Hydrate Recovery by Carbon Dioxide Replacement

et al. 2021

View full text Add to dashboard Cite

Natural gas hydrate (NGH) is one of the most potential alternative energy sources in the future due to its huge reserves. Economic, efficient, and safe exploitation of hydrate reservoirs is key to the utilization of NGH. CO2 replacement of NGH is widely of interest because it can realize hydrate exploitation and carbon dioxide capture at the same time, and CO2 replacment of CH4 in NGH can stabilize the formation. However, the disadvantages of CO2 replacement of NGH are low recovery efficiency and slow replacement rate. This review summarizes all of the developed enhanced methods and technologies of CO2 replacement in recent years and compares the CH4 recovery efficiency of these methods and discusses the main influencing factors of these methods. These methods include liquid CO2 (emulsion CO2) replacement, CO2/N2 replacement, CO2/H2 replacement, CO2 replacement combined depressurization, and CO2 replacement combined thermal stimulation. In general, using a gas mixture for replacement could obtained high CH4 recovery. The appropriate concentration of a displacement mixture gas can avoid the increase of energy consumption in production gas separation. Replacement coupling depressurization or thermal stimulation enhanced the CH4 recovery significantly, but energy consumption also needs to be considered.

show abstract

Effects of Hydrate Saturation and Sand-Filling Content on Hydrate Exploitation Using In-Situ Heat Supply with Chemical Reagents

Zhang,

Wang,

Chen

et al. 2024

Lecture Notes in Civil Engineering

View full text Add to dashboard Cite

Analysis of hydrate exploitation by a new in-situ heat generation method with chemical reagents based on heat utilization

Cited by 20 publications

References 55 publications

Recent Advances in Methods of Gas Recovery from Hydrate-Bearing Sediments: A Review

Recent Advances in Methods of Gas Recovery from Hydrate-Bearing Sediments: A Review

Review on Enhanced Technology of Natural Gas Hydrate Recovery by Carbon Dioxide Replacement

Effects of Hydrate Saturation and Sand-Filling Content on Hydrate Exploitation Using In-Situ Heat Supply with Chemical Reagents

Contact Info

Product

Resources

About