Study on Co-production compatibility evaluation method of multilayer tight gas reservoir

Zhong, Guanghao; Li, Song; Tang, Dazhen; Tian, Wei; Lin, Weiren; Feng, Peng

doi:10.1016/j.jngse.2022.104840

Cited by 7 publications

(1 citation statement)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To this end, various development modes have been proposed, such as depressurization combined with thermal stimulation, multibranch horizontal wells, and infilled wells . Of these, hydraulic fracturing is generally recognized as a promising technology. − Particularly, based on the experience of multilayer fracturing and coproduction in unconventional oil and gas reservoirs, − production efficiency may be further improved if free gas and hydrate dissociation gas are recovered simultaneously via fractures. , Thus, exploring the fracturing behavior of gas hydrate reservoirs has become a key issue.…”

Section: Introductionmentioning

confidence: 99%

Research on Hydraulic Fracture Propagation Patterns in Multilayered Gas Hydrate Reservoirs Using a Three-Dimensional XFEM-Based Cohesive Zone Method

Nie,

Liu,

Zhong

et al. 2024

Energy Fuels

View full text Add to dashboard Cite

Hydraulic fracturing is generally considered a promising stimulation technology for low-permeability gas hydrate reservoirs. Nevertheless, the fracturing behavior of multilayered "sweet-spot" reservoirs with coexisting hydrates and free gas is rarely studied. Herein, a three-dimensional (3D) multilayer fracturing model was built by combining the extended finite element and cohesive zone method, taking the reservoir containing a hydrate-bearing layer (HBL), three-phase layer (TPL), and free gas layer (FGL) located in the Shenhu Area as the geoengineering background. Particularly, the effects of key factors, such as the fracturing layer, hydrate saturation of the HBL, injection rate, and viscosity of fracturing fluids, on fracture initiation and propagation were investigated. The results show that the interlayer heterogeneity caused by differences in hydrate saturation results in various propagation patterns. Specifically, when fracturing in HBL, fractures tended to propagate upward under the influence of the geostress gradient, resulting in TPL and FGL not being fractured, whereas multilayers could be reconstructed simultaneously when fracturing in TPL, and proper fracturing parameters should be selected according to the hydrate saturation. For HBL with a hydrate saturation lower than 31%, fracture propagation was favored at a low injection rate and low-viscosity fracturing fluid, whereas for HBL with 43% hydrate saturation, it played a "shielding" role against fracture penetration due to the high mechanical strength and low effective permeability. In this case, fracture penetration was encouraged by increasing the fracturing fluid viscosity. Therefore, multilayer fracturing can be realized by fracturing in TPL and optimizing fracturing plans, which is of great significance for enhancing the development potential of challenging hydrates.

show abstract

Section: Introductionmentioning

confidence: 99%

Research on Hydraulic Fracture Propagation Patterns in Multilayered Gas Hydrate Reservoirs Using a Three-Dimensional XFEM-Based Cohesive Zone Method

Nie,

Liu,

Zhong

et al. 2024

Energy Fuels

View full text Add to dashboard Cite

show abstract

Opportunities and challenges for gas coproduction from coal measure gas reservoirs with coal‐shale‐tight sandstone layers: A review

Liang,

Wang,

Leung

et al. 2024

Deep Underground Science and Engineering

View full text Add to dashboard Cite

The extraction of coal measure gas has been shifted toward thin gas reservoirs due to the depletion of medium‐thick gas reservoirs. The coproduction of coalbed gas, shale gas, and tight sandstone gas (called a multisuperposed gas system) is a key low‐cost technology for the enhancement of natural gas production from thin gas reservoirs in coal measure. As an emerging engineering exploitation technology at its early stage of development, gas coproduction confronts various engineering challenges in hydraulic fracturing, bottom‐hole pressure regulation, well network arrangement, and extraction sequence. The current understanding of the opportunities and challenges in the gas coproduction from the multisuperposed gas system is not comprehensive enough. In this case, the previous achievements in the field of gas coproduction should be urgently reviewed to provide valuable guidance and recommendations for further development. This review first discusses the regional and spatial distribution characteristics and possible reservoir combinations of gas reservoirs in coal measure. Then, the basic properties of different reservoirs, engineering challenges, and interlayer interference are comparatively analyzed and discussed. The current simulation models for gas coproduction and potential future research directions are further explored. The results indicate that the coupling effects of reservoir heterogeneity, interwell interference, and geological structure for increasing coproduction prediction accuracy should be included in future simulation models for gas coproduction. Careful investigation is required to explore the mechanisms and their further quantifications on the effects of interlayer interference in gas coproduction. The fractal dimension as a scale can play an important role in the characterization of the gas and water transport in different reservoirs. The machine learning methods have tremendous potential to provide accurate and fast predictions for gas coproduction and interlayer interference.

show abstract

Sequence stratigraphic analysis of superimposed coal measure gas-bearing system in Daning-Jixian block, eastern margin of Ordos Basin, China

Yang,

Li,

Tian

et al. 2024

Front. Earth Sci.

View full text Add to dashboard Cite

Study on Co-production compatibility evaluation method of multilayer tight gas reservoir

Cited by 7 publications

References 42 publications

Research on Hydraulic Fracture Propagation Patterns in Multilayered Gas Hydrate Reservoirs Using a Three-Dimensional XFEM-Based Cohesive Zone Method

Research on Hydraulic Fracture Propagation Patterns in Multilayered Gas Hydrate Reservoirs Using a Three-Dimensional XFEM-Based Cohesive Zone Method

Opportunities and challenges for gas coproduction from coal measure gas reservoirs with coal‐shale‐tight sandstone layers: A review

Sequence stratigraphic analysis of superimposed coal measure gas-bearing system in Daning-Jixian block, eastern margin of Ordos Basin, China

Contact Info

Product

Resources

About