Fracture network stimulation effect on hydrate development by depressurization combined with thermal stimulation using injection-production well patterns

Zhong, Xiuping; Pan, Dong; Zhu, Ying; Zhai, Lianghao; Li, Xitong; Tu, Guigang; Chen, Chen

doi:10.1016/j.energy.2021.120601

Cited by 26 publications

(12 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Section: Hydraulic Fracturingmentioning

confidence: 99%

“…The existence of fractures can expand the effective well spacing, and reasonably setting the well spacing according to the production period is conducive to reducing the well-spacing density and drilling cost. Zhong et al 104 studied a production plan to connect a three-point horizontal well to a fracture network, as shown in Figure 10. The cumulative gas production was found to be 3.26 times that of simple depressurization.…”

Section: Fracture Formation and Developmentmentioning

confidence: 99%

See 1 more Smart Citation

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

Liang

2023

Energy Fuels

View full text Add to dashboard Cite

The energy crisis has intensified in recent years. The current global economic environment and increasing cost of mining necessitate additional energy access channels. Previous studies have shown that natural gas hydrate reservoirs (NGHRs) contain a large number of natural gas resources. However, several problems are associated with the safe and efficient exploitation of the NGHRs. Reservoir stimulation technology is expected to address these issues. This study introduces the properties and mining difficulties of NGHRs and reviews their stimulation scheme and related research progress based on three perspectives: hydraulic fracturing, burden sealing, and near-well reconstruction. The principles, advantages, and limitations of the three schemes are compared. In addition to the stimulation effects of the three aforementioned methods, this study focused on the fracability of NGHRs, the factors influencing fracture initiation and development, and the fracturing fluid, proppant, completion fluid, and slurry suitable for NGHR stimulation. In addition, the principles, current challenges, and future research prospects for reservoir stimulation are summarized to provide a reference for the commercial exploitation of natural gas hydrates in the future.

show abstract

Section: Hydraulic Fracturingmentioning

confidence: 99%

Section: Fracture Formation and Developmentmentioning

confidence: 99%

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

Liang

2023

Energy Fuels

View full text Add to dashboard Cite

show abstract

“…Furthermore, the effectiveness of thermal stimulation has also been confirmed through reservoir-scale modeling. Zhong et al , combined hydraulic fracturing (HF) with hot water injection and argued that this combined method could profoundly improve the gas production performance with a large well spacing. Liu et al proposed a novel staged production method involving a horizontal production well and a vertical hot water injection well to promote gas recovery from NGH deposits.…”

Section: Introductionmentioning

confidence: 99%

Feasibility Evaluation of a New Approach of Seawater Flooding for Offshore Natural Gas Hydrate Exploitation

Chen

Jiang

et al. 2023

Energy Fuels

View full text Add to dashboard Cite

In this work, a new approach of seawater flooding was proposed for offshore natural gas hydrate (NGH) exploitation, whose feasibility was numerically evaluated based on a large-scale NGH reservoir situated in the Shenhu Area of the South China Sea. Then, two artificial means of well location rearrangement and hydraulic fracturing, as well as their combination, were proposed to be incorporated with seawater flooding to promote gas production from offshore NGH deposits. Simulation results indicated that seawater flooding had great advantages over depressurization and could substantially promote hydrate dissociation, effectively prevent secondary hydrate formation, and greatly facilitate gas production. Furthermore, a stable gas production period could be achieved for a long duration, which made the most significant contribution to gas production. The two artificial means of well location rearrangement and hydraulic fracturing could both promote hydrate dissociation and enhance gas recovery, but the promotion mechanisms were different. When these two methods were combined, hydrate dissociation in the whole hydrate-bearing layer could be further facilitated, and a favorable gas production rate could be obtained with a low water production and a high gas−water ratio, which demonstrated great superiority of the combined method over these two methods when used alone. Therefore, it is expected that the newly proposed approach of seawater flooding combined with well location rearrangement and hydraulic fracturing can be applied in the future commercial offshore NGH development.

show abstract

“…Furthermore, the effect of fracturing on gas production has been investigated using numerical tools such as Tough+Hydrate. The production performance of vertical wells (Chen et al, 2017;Feng et al, 2019;Guo et al, 2020;Li et al, 2021b), horizontal wells (Sun et al, 2019;Ma et al, 2021b;Shen et al, 2021;Yu et al, 2021), and three-well injectionproduction systems (Ju et al, 2020;Zhong et al, 2020Zhong et al, , 2021 in NGH reservoirs after fracturing has been numerically studied. Gas production has also been analyzed for laboratory scale fracturing (Feng et al, 2021;Zhao et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Numerical study of response behaviors of natural gas hydrate reservoir around wellbore induced by water jet slotting

Huang

Zhao

et al. 2022

Adv. Geo-Energy Res.

View full text Add to dashboard Cite

The trial production of natural gas hydrate reservoirs remains poor. Reasonable reservoir reconstruction, which can improve formation permeability, is an important approach to increasing the efficiency and enhancing production. In this work, water jet slotting is proposed to reconstruct an natural gas hydrate reservoir near a wellbore. The spatial slots formed by water jet slotting not only directly constitute high-permeability channels, but also generate disturbances to the surrounding in-situ sediment. Water jet slotting disturbances to nearby sediment was investigated using a three dimensional flow-structure coupling model to evaluate the proposed reconstruction method. The reservoir at the SH2 site in the Shenhu area of the South China Sea was used as the reference. A horizontal slotting arrangement along the vertical well was adopted. The results demonstrate that water jet slotting can change the primary stress state of the sediment around the wellbore, and generate a dominant stress relaxation zone and small stress concentration zone. Within the stress relaxation zone, the in-situ compressive stress was remarkably reduced or even transformed into tensile stress, accompanied by sediment displacement and volumetric expansion strain. This is conducive to loosening the sediment around the wellbore and improving the permeability characteristics. In addition, the influence of the water jet slotting parameters including slot radius, spacing, and number on disturbances to the nearby sediment was studied. Reservoir responses to water jet slotting under balanced and unbalanced bottom-hole pressures were compared and analyzed. This study provides a reference for natural gas hydrate reservoir reconstruction using water jet slotting.

show abstract

Fracture network stimulation effect on hydrate development by depressurization combined with thermal stimulation using injection-production well patterns

Cited by 26 publications

References 49 publications

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

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

Feasibility Evaluation of a New Approach of Seawater Flooding for Offshore Natural Gas Hydrate Exploitation

Numerical study of response behaviors of natural gas hydrate reservoir around wellbore induced by water jet slotting

Contact Info

Product

Resources

About