Multi-Fracture Synchronous Propagation Mechanism of Multi-Clustered Fracturing in Interlayered Tight Sandstone Reservoir

Fuchun Tian, Yan Jin, Fengming Jin, Xiaonan Ma, Lin Shi, Jun Zhang, Dezhi Qiu and Zhuo Zhang
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Fuchun Tian: College of Petroleum Engineering, China University of Petroleum, Beijing 102200, China
Yan Jin: College of Petroleum Engineering, China University of Petroleum, Beijing 102200, China
Fengming Jin: PetroChina Dagang Oilfield Company, Tianjin 300280, China
Xiaonan Ma: PetroChina Dagang Oilfield Company, Tianjin 300280, China
Lin Shi: College of Petroleum Engineering, China University of Petroleum, Beijing 102200, China
Jun Zhang: Department of Petroleum Engineering, Northeast Petroleum University, Daqing 163318, China
Dezhi Qiu: Guangzhou Marine Geological Survey, Guangzhou 511458, China
Zhuo Zhang: School of Ocean and Earth Science, Tongji University, Shanghai 200092, China

Sustainability, 2022, vol. 14, issue 14, 1-18

Abstract: A numerical model was established by using the 3D lattice method to investigate the synchronous propagation mechanism of multiple clusters of hydraulic fractures in interlayered tight sandstone reservoirs in the Songliao Basin in China. The multi-fracture synchronous propagation model under different geological factors and fracturing engineering factors was simulated. The results show that the vertical stress difference, interlayer Young’s modulus, and lithologic interface strength are positively correlated with the longitudinal propagation ability of multiple hydraulic fractures. The three clusters of hydraulic fractures can have adequate longitudinal extension capacity and transverse propagation range with 15 m cluster spacing and a 12 m 3 /min pumping rate. The viscosity of the fracturing fluid is positively correlated with the ability of hydraulic fracture to penetrate the interlayer longitudinally but negatively correlated with the transverse propagation length. It is recommended that high viscosity fracturing fluid is used in the early stage of multi-clustered fracturing in interlayered tight sandstone reservoirs to promote hydraulic fractures to penetrate more interlayers and communicate more pay layers in the longitudinal direction, and low viscosity fracturing fluid in the later stage to make multiple clusters of fractures propagate to the far end where possible and obtain a more ideal SRV.

Keywords: multi cluster fracturing; vertical propagation; interlayered reservoir; 3D lattice method (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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