Effect of Gas Reservoir Pressure Depletion on Capillary Pressure

Wang, Lin

doi:10.1007/978-981-16-0761-5_165

Cited by 1 publication

(1 citation statement)

References 17 publications

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“…It is widely distributed and includes huge reserves, which account for nearly 40% of the total natural gas reserves that have been confirmed [1][2][3], indicating huge potential for development. However, with low permeability and porosity, poor mobility, and weak natural energy, tight gas reservoirs cannot achieve commercial exploitation without hydraulic fracturing [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Influencing Factors Analysis and Optimization of Hydraulic Fracturing in Multi-Layered and Thin Tight Sandstone Gas Reservoir

Zhang,

Bai,

Fang

et al. 2023

Energies

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With the deepening of exploration and development of tight sandstone gas reservoirs, the remaining recoverable reservoirs gradually become thinner with the vertical stratigraphic structure. The geomechanical properties become complex, and development based on conventional hydraulic fracturing methods often leads to serious problems, such as difficult control of fracture height, penetrating interlayers, too short fracture length, and inadequate proppant filling. In view of the above problems, we conducted a numerical investigation on a hydraulic fracturing scheme in a multi-layered and thin tight sandstone gas reservoir. According to the dataset from wells in a real gas reservoir in China’s Ordos Basin, the relevant geomechanical characteristics of the gas layers, together with the interlayers in the main production interval, were obtained, based on which, a fine numerical model was developed. By using the PL3D fracture propagation algorithm, a 3D hydraulic fracture propagation model was produced, and then using microseismic monitoring and production data matching, a high-precision hydraulic fracture model of the multi-layered and thin tight sandstone gas reservoir was obtained. On this basis, the influence of different geomechanical parameters and fracturing operational parameters on hydraulic fracture propagation was analyzed. Finally, an optimized hydraulic fracturing scheme that fitted the characteristics of the multi-layered and thin tight sandstone gas reservoir was proposed. Using a typical reservoir example, the optimized scheme enabled control of the fracture height in thin layers and the creation of long fractures with better proppant filling, so that the productivity of the fracture was significantly improved.

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