... effective stress-sensitive reservoirs fully penetrated by fractured oil wells. The hydraulic fracture in the proposed mathematical modeling is finite with tip effects and crosses the whole reservoir net-pay. A new permeability stress-sensitive pseudopressure m ⁢ ( σ ′ ) is developed, and the solution...

...Qian Gao; Desheng Zhou; Ahmad Ghassemi; Xiong Liu; Yafei Liu; Minhao Guo Summary As a mature technology to enhance the permeability of geological formations, hydraulic fracturing has widely been used in geothermal energy development and in the petroleum industry. Due to its effectiveness...

...Sihan Yang; Xiaoping Li; Qiguo Liu; Youjie Xu Summary Since there are several hydraulic fractures around a wellbore after a large-scale hydraulic fracturing and the well is not in the center of the reservoir, no corresponding semianalytical model for wellbore pressure analysis has been proposed...

...Qian Gao; Ahmad Ghassemi Summary The impacts of formation layering on hydraulic fracture containment and on pumping energy are critical factors in a successful stimulation treatment. Conventionally, it is considered that the in-situ stress is the dominant factor controlling the fracture height...

... −5 psi −1 ) are close to the lower limit of the values estimated by previous studies, which can be explained by the presence of proppants in hydraulic fractures. Fu et al. (2019) applied rate-decline analysis to water-flowback data from a shale reservoir and observed an HD trend in water...

...Chao Wei; Bo Zhang; Shucai Li; Zhixin Fan; Chengxin Li Summary Pulse hydraulic fracturing technology can greatly improve the effect of fracture propagation in rock and form complex fracture networks in reservoirs. The interaction mechanism between hydraulic fractures and pre-existing fractures...

... of weakness (e.g., fissures) and create branch fractures that can connect hydraulic fractures to stress-relief fractures, ultimately enhancing fracture connectivity and complexity. It has been trialed in western Siberia (2014) and western Canada (2017 to 2019) with overall operational and production...

...Xiaofan Hu; Guoqing Liu; Guofan Luo; Christine Ehlig-Economides Summary Engineers commonly expect symmetric fracture wings in multiple‐transverse‐fracture horizontal wells. Microseismic surveys have shown that asymmetric hydraulic fractures grow away from the recent fractured wells and grow toward...

... the change in pressure with time for constant production rate, whereas the second represents the change in flow rate with time for constant wellbore pressure, and is called the flow‐rate function ( q ) . The effects of hydraulic‐fracture characteristics, reservoir configurations, and the dominant flow...

...A.. Ugursal; D.. Zhu; A. D. Hill Summary During an acid fracturing treatment in a carbonate reservoir, acid is injected into the formation, thus creating hydraulic fractures and opening existing natural fractures. As the acid flows into natural fractures that intersect hydraulic fractures (main...

... production rate in STB/D, and q om is the model–calculated production rate in STB/D (Singh et al. 2015 ; Shi et al. 2016 ). Copyright 2019, Society of Petroleum Engineers shale gas multifractured horizontal well time-dependent fracture conductivity conductivity hydraulic fracturing oil...

.... Within the flow simulation, the hydraulic fracture is represented explicitly in the computational domain by means of local‐grid refinement, and the physical process of fracture closure during shut‐in and production periods is modeled by adjusting the fracture volume and fracture conductivity dynamically...

...Aditya Nikam; Obadare O. Awoleke; Mohabbat Ahmadi Summary We built a 3D geomechanical model using commercially available finite–element–analysis (FEA) software to simulate a propagating hydraulic fracture (HF) and its interaction with a vertical natural fracture (NF) in a tight medium. These newly...

..., indicating the beginning of pseudosteady state, wherein the PI demonstrates constant value. The reservoirs in this study are considered depleted by horizontal wells intersecting multiple hydraulic fractures where Darcy flow and non-Darcy flow may control flow patterns in the porous media. The PI...

... and Mattar 2013 ) to simulate the VFW with SRV, as illustrated in Fig. 2 . In this model, the tight oil reservoir is classified into two composite rectangle regions. The inner region is simplified as a dual-porosity model with single biwing hydraulic fracture, and the outer region is simulated...

... the wellbore is shown to be enough to alter the number of fractures created in a hydraulic-fracturing stage and mask the effects of stress shadowing. Interstage fracture simulations show post-shut-in fracture extension induced by stress interference from adjacent propagating fractures. The effect...

...Songxia Liu; Peter P. Valkó Summary Fracture height is a critical input parameter for 2D hydraulic-fracturing-design models, and also an important output result of 3D models. Although many factors may influence fracture-height evolution in multilayer formations, the consensus is that the so-called...

...Jianlei Sun; David Schechter Summary Unconventional shale reservoirs require massive and multistage hydraulically fractured horizontal wells to produce economically. Induced hydraulic fractures interacting with in-situ natural fractures result in complex or discrete fracture networks (DFNs). Even...

...Kan Wu; Biyi Wu; Wei Yu Summary Well interference is a common phenomenon between wells observed in unconventional reservoirs, which has received significant attention. It plays an important role in well-spacing considerations. Massive hydraulic fractures are generated in horizontal wells...

...Vibhas J. Pandey; Thomas Flottman; Nola R. Zwarich Summary Modern hydraulic-fracture treatments are designed by use of fracture simulators that require formation-related inputs, such as in-situ stresses and rock mechanical properties, to optimize stimulation designs for targeted reservoir zones...