Journal Article10.1007/S12517-016-2823-X
Cluster spacing optimization of multi-stage fracturing in horizontal shale gas wells based on stimulated reservoir volume evaluation
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TL;DR: In this article, the authors proposed a compelling cluster spacing optimization method, which could reduce the uncertainty in cluster spacing design, and provided some new insights on the optimal design of multi-stage fracturing in horizontal shale gas well.
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Abstract: The multi-stage fracturing in horizontal well is a common technique for shale gas reservoir exploitation, in which cluster spacing governs the fracturing performance. Undersized cluster spacing might make the stimulated reservoir volume (SRV), activated by the respective hydraulic fracture, excessively overlap with each other, while oversized cluster spacing might leave a large unstimulated volume between neighboring hydraulic fractures; in either case, fracturing would be inefficient. Previous design of cluster spacing has failed to maximize the SRV due to the absence of a dynamic SRV evaluation model. A numerical model of SRV evaluation in shale reservoir was established by integrating four main modules, including fracture propagation, reservoir pressure distribution, formation stress distribution, and natural fracture failure criterion. Then, a method to optimize cluster spacing was developed with the goal of maximizing SRV. In order to validate this method, it was applied in Fuling shale gas reservoir in Southwest China to determine the optimal cluster spacing. The sensitivity of key parameters on the optimal cluster spacing has been analyzed. This research proposed a compelling cluster spacing optimization method, which could reduce the uncertainty in cluster spacing design, and provides some new insights on the optimal design of multi-stage fracturing in horizontal shale gas well.
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Citations
Ten years of gas shale fracturing in China: Review and prospect
Jinzhou Zhao,Lan Ren,Tingxue Jiang,Dongfeng Hu,Lei Wu,Jianfa Wu,Congbin Yin,Yongming Li,Yongquan Hu,Ran Lin,Xiaogang Li,Yu Peng,Cheng Shen,Xiyu Chen,Qing Yin,Changgui Jia,Yi Song,Haitao Wang,Zhaoyuan Li,Jianjun Wu,Bin Zeng,Linlin Du +21 more
TL;DR: Wang et al. as discussed by the authors comprehensively reviewed development history and status of domestic fundamental theories, optimized design methods, fluid systems, tools and technologies of shale gas fracturing and summarized the research results in fundamental theories and optimization methods, such as fracturing sweet-spot cognition, fracture network propagation simulation and control, rock hydration and flowback control.
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Stimulated reservoir volume estimation for shale gas fracturing: Mechanism and modeling approach
TL;DR: In this paper, the authors developed a mathematical model to estimate the stimulated reservoir volume (SRV) through simulating the main process during shale fracturing, where multiple simultaneous hydraulic fractures propagate, perturbing the formation stress and raising the reservoir pressure; meanwhile, the stress change and pressure rise may jointly make natural fractures occur failure, and the SRV is estimated based on the volume of the naturally fractured zone that experiences tensile or shear failure.
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Optimization of horizontal well fracturing in shale gas reservoir based on stimulated reservoir volume
Hao Zhang,James J. Sheng +1 more
TL;DR: In this paper, the authors proposed a mathematical model for estimating the stimulated reservoir volume (SRV) during hydraulic fracturing, which couples both rock and fluid mechanics effects to obtain the optimal well design under the effect of SRV.
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Numerical simulation of stress shadow in multiple cluster hydraulic fracturing in horizontal wells based on lattice modelling
TL;DR: In this article, a particle-based computational method was used to investigate the multiple cluster hydraulic fracturing in shale, and the results showed that stress anisotropy and cluster spacing play an important role on geometry of the propagating fracture.
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Latest research progresses in network fracturing theories and technologies for shale gas reservoirs
TL;DR: In this paper, the authors analyzed the latest developments in such theories on the fields like fracture network fracability evaluation, fracture network propagation mechanism, stimulated reservoir volume (SRV) evaluation and fracturing fluid research & development.
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References
Predicting fracture swarms -- the influence of subcritical crack growth and the crack-tip process zone on joint spacing in rock
TL;DR: In this article, the authors consider fracture swarm formation in sedimentary rock and identify three regimes of fracture spacing according to the magnitude of the subcritical index of the fracturing material, and use a subcritical crack-propagation rule, where propagation velocity during stable growth scales with the cracktip stress intensity factor.
340
The characteristics and significance of conventional and unconventional Sinian–Silurian gas systems in the Sichuan Basin, central China
Caineng Zou,Zhi Yang,Jingxing Dai,Dazhong Dong,Baomin Zhang,Yuman Wang,Shenghui Deng,Jinliang Huang,Keyu Liu,Chun Yang,Guoqi Wei,Songqi Pan +11 more
TL;DR: In this paper, the authors proposed a migration-accumulation type Sinian-Cambrian gas system, which is a result of numerous processes, including (1) paleo-high trapping within a relatively stable tectonic setting, (2) appropriate source materials located in a paleorift trough, (3) large-scale dolomite grainstone reservoirs located near the paleo high, (4) adequate gas produced from in-situ crude oil cracking, and, (5) gypsum-salt and shale cap rock preservation.
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