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Numerical Simulation of Fracking in Shale Rocks: Current State and Future Approaches

Fig. 1 Fracking example

The anisotropy of shale depends significantly on the scale at which the problem is tackled (nano, micro or macroscale), suggesting that a multiscale model would be appropriate. Moreover, propagation of hydraulic fractures in such a complex medium can be difficult to model with current numerical discretisation methods. The crack propagation

Superhydrophilic Functionalization of Microfiltration Ceramic Membranes Enables Separation of Hydrocarbons from Frac and Produced Water

Superhydrophilic Functionalization of Microfiltration Ceramic Membranes Enables Separation of Hydrocarbons from Frac and Produced Water

Membrane fouling is essentially eliminated, while a specific flux is obtained at a lower pressure (<2 bar) than that required achieving the same flux for the untreated membrane (4–8 bar). Introduction Although the long-term solution to global energy needs must be based on renewable sources, the present demand for oil and gas shows no

Well test, rate transient analysis and reservoir simulation for characterizing multi-fractured unconventional oil and gas reservoirs

Also at the well location, although the well may penetrate a productive shale, but in the same interval, away from the well location there might be non-productive shale sections. In other words, in unconventional shale reservoirs, productive shale zones and non-productive shale sections have randomly been distributed as illustrated in Fig. 3.

Abstract Unconventional reservoirs such as shale gas and shale oil have become an increasingly important source of energy in the USA with potential reservoirs identified worldwide. Due to the insufficient permeability of the shale reservoirs, they require efficient stimulation using multistage hydraulic fractures to produce gas  in commercial quantities. A critical

The influence of water-based drilling fluid on mechanical property of shale and the wellbore stability

Because of high cost and pollution of oil-based drilling fluid, the water-based drilling fluid is increasingly used now. However, bedding planes and micro-cracks are rich in shale formation. When water-based drilling fluid contacts formation rock, it causes the propagation of crack and invasion of drilling fluid, which decrease shale strength and cause wellbore instability. In this paper, we analyzed influence of water-based drilling fluid on shale strength and failure mode by mechanics experiment.

The influence of water-based drilling fluid on mechanical property of  shale and the wellbore stability   Shu Hea, Lixi Liangb, Yinjin  Zenga, Yi Dingb, Yongxue Lina, Xiangjun Liub aSinopec Research Institute of Petroleum Engineering, Beijing 100101, China. bState Key Lab  of Oil & Gas  Reservoir Geology and Exploitation, Southwest  Petroleum University, Chengdu, Sichuan

An Experimental Investigation of Shale Mechanical Properties Through Drained and Undrained Test Mechanisms Part B

Rock Deformation Versus Bedding Plane A comparative study of the material deformations under shearing on different bedding samples is presented in Fig. 16. This analysis is interpreted as the peak deviation with respect to axial or radial deformation. Basically, such an analysis helps provide a clear picture of weak bedding in terms of the stiffness.

An Experimental Investigation of Shale Mechanical Properties Through Drained and Undrained Test Mechanisms Part B   Md. Aminul Islam and Paal  Skalle   In the first part of “An Experimental Investigation of Shale Mechanical Properties..." was developed: Introduction Materials and Methods Elastic Moduli of Shale—Theory Elastic Moduli—Results  and Discussion   5 Cyclic Versus Monotonic Test Effects on Rock Strength The CIU

Activated desorption at heterogeneous interfaces and long-time kinetics of hydrocarbon recovery from nanoporous media

Hydrocarbon recovery from unconventional reservoirs (shale gas) is debated due to its environmental impact and uncertainties on its predictability. But a lack of scientific knowledge impedes the proposal of reliable alternatives. The requirement of hydrofracking, fast recovery decay and ultra-low permeability—inherent to their nanoporosity—are specificities of these reservoirs, which challenge existing frameworks. Here we use molecular simulation and statistical models to show that recovery is hampered by interfacial effects at the wet kerogen surface.

Activated desorption at heterogeneous interfaces and long-time kinetics of hydrocarbon recovery from nanoporous media   Thomas Lee1,2, Lyderic Bocquet1,2,3 & Benoit Coasne1,2,4 1MultiScale Materials Science for Energy and Environment, Joint CNRS-MIT Laboratory, UMI CNRS 3466,  Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA. 2Department  of Civil and Environmental Engineering, Massachusetts Institute of Technology,

Simulating the hydraulic stimulation of multiple fractures in an anisotropic stress field applying the discrete element method

The current study investigates hydraulic fracture stimulation for an Enhanced Geothermal System (EGS) in a petrothermal environment to evaluate stress shadowing and fracture interaction in a multi-fracture setup. Previous studies investigated the geothermal potential of the area around Freiberg (Saxony, Germany), which is therefore used as a case example. The commercial discrete element code 3DEC™ is applied to conduct the numerical simulations. The simulation results show that hydraulic fracture stimulation results in a strong stress field alteration, which significantly influences the propagation of subsequently stimulated fractures. The resulting deflection of fractures can be minimized applying an optimized stimulation concept.

Simulating the hydraulic stimulation of multiple fractures in an anisotropic stress field applying the discrete element method   Conny Zeeba, Heinz Konietzkya aGeotechnical Institute, TU Bergakademie Freiberg, Gustav-Zeuner-Str. 1, 09599 Freiberg, Germany   Abstract The current  study  investigates  hydraulic  fracture  stimulation  for an Enhanced  Geothermal  System  (EGS)  in a petrothermal environment  to evaluate stress shadowing and

A Comprehensive Model for Real Gas Transport in Shale Formations with Complex Non-planar Fracture Networks

Case 1 is the simple planar hydraulic fracture; Case 2 is the non-planar hydraulic fracture; Case 3 is the simple planar natural fracture; Case 4 is the non-planar natural fracture; Case 5 is the simple planar natural fracture network; Case 6 is the non-planar natural fracture network.

  A Comprehensive Model for Real Gas Transport in Shale Formations with Complex Non-planar Fracture Networks   Ruiyue Yang1, Zhongwei Huang1, Wei Yu2, Gensheng Li1, Wenxi Ren1, Lihua Zuo2, Xiaosi Tan2, Kamy Sepehrnoori3, Shouceng Tian1 & Mao Sheng1 1State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, P.R. China.

Microseismic Imaging of Hydraulically Induced-Fractures in Gas Reservoirs: A Case Study in Barnett Shale Gas Reservoir, Texas, USA

Microseismic technology has been proven to be a practical approach for in-situ monitoring of fracture growth during hydraulic fracture stimulations. Microseismic monitoring has rapidly evolved in acquisition methodology, data processing, and in this paper, we evaluate the progression of this technology with emphasis on their applications in Barnett shale gas reservoir.

Microseismic Imaging of Hydraulically Induced-Fractures in Gas Reservoirs: A Case Study in Barnett Shale Gas Reservoir, Texas, USA   Abdulaziz M. Abdulaziz Mining, Petroleum, and Metallurgical Engineering Department, Faculty of Engineering, Cairo University, Giza, Egypt Abstract Microseismic technology has been proven to be a practical approach for in-situ monitoring of fracture growth during hydraulic fracture

Selection of the optimal completion of horizontal wells with multi-stage hydraulic fracturing of the low-permeable formation, field C

Selection of the optimal completion of horizontal wells with multi-stage hydraulic fracturing of the low-permeable formation

Selection of the optimal completion of horizontal wells with multi-stage hydraulic fracturing of the low-permeable formation, field C Author: A.M. Bozoev1 and E.A. Demidova2 1-Gazpromneft Muravlenko, Muravlenko, Russia, 2-Tomsk Polytechnic University, Tomsk, Russia Abstract At  the  moment,  many  fields  of  Western  Siberia  are  in  the  later  stages  of development. In this regard, the multilayer

Simulation of Gas Transport in Tight/Shale Gas Reservoirs by a Multicomponent Model Based on PEBI Grid

Simulation of Gas Transport in Tight/Shale Gas Reservoirs by a Multicomponent Model Based on PEBI Grid Longjun Zhang1, Daolun Li1,2, Lei Wang3 and Detang Lu1 1Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027, China. 2Hefei University of Technology, Hefei 230026, China. 3Institute of Nuclear Energy Safety Technology,

WHAT IS A SHALE?

Gray Shale rock from Vaca Muerta Formation, Neuquén, Argentina.

WHAT IS A SHALE? Author: Emanuel Martin Shale is a sedimentary clastic fine-grained rock rich in organic matter composed of silt and clay with the distinctive feature of break easily in thin layers. It belongs to the family of the mudrocks and although these are the 60% of the Earth’s crust just a

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