A New Approach to Hydraulic Fracturing Modeling - Fully Coupled with Geomechanical and Reservoir Simulation

2006 ◽  
Author(s):  
Lujun Ji ◽  
Antonin Settari ◽  
Richard Burl Sullivan
Keyword(s):  
Hydraulic Fracturing ◽  
Reservoir Simulation ◽  
New Approach ◽  
Fully Coupled

A Novel Hydraulic Fracturing Model Fully Coupled With Geomechanics and Reservoir Simulation

SPE Journal ◽  
2009 ◽  
Vol 14 (03) ◽  
pp. 423-430 ◽  
Author(s):  
Lujun Ji ◽  
Antonin Settari ◽  
Richard B. Sullivan
Keyword(s):  
Hydraulic Fracturing ◽  
Reservoir Simulation ◽  
Fully Coupled

Improved modelling of pressure-dependent permeability behaviour in coal based on a new workflow of petrophysics, hydraulic fracturing and reservoir simulation

2021 ◽  
Vol 61 (1) ◽  
pp. 106
Author(s):  
Honja Miharisoa Ramanandraibe ◽  
Ayrton Soares Ribeiro ◽  
Raymond Johnson ◽  
Zhenjiang You
Keyword(s):  
Hydraulic Fracturing ◽  
Reservoir Simulation

Fully Integrating a Hydraulic Fracturing, Reservoir, and Wellbore Simulator into a Practical Engineering Tool

2021 ◽  
Author(s):  
Mark McClure
Keyword(s):  
User Interface ◽  
Hydraulic Fracturing ◽  
Volume Fraction ◽  
3D Visualization ◽  
Constitutive Relations ◽  
Coupled Processes ◽  
Tight Coupling ◽  
Member States ◽  
Proppant Transport ◽  
Fully Coupled

<p>In this talk, I give an overview of our software ResFrac, which fully integrates a ‘true’ hydraulic fracturing simulator and a multiphase reservoir simulator (McClure et al., 2020a). Conventionally, these processes have been described with separate codes, using separate meshes, and with different physics. Integrating these two categories of software is advantageous because it enables seamless description of the entire lifecycle of a well. It is possible to seamlessly integrate wells with complex histories such as frac hits from offset wells, refracs, and huff and puff EOR injection.</p><p>ResFrac has been applied on 25+ studies for operators optimizing development of oil and gas resources in shale and has been commercially licensed by 15+ companies (https://www.resfrac.com/case-studies; https://www.resfrac.com/publications; https://www.resfrac.com/about-us/our-team). The simulator has a modern user-interface with embedded help-documentation, wizards to help set up simulations, automated validators to identify issues with the setup prior to submitting, and plotting capabilities to preview 3D and tabular inputs. Simulations are run on the cloud and results are continuously downloaded to the user’s computer. This allows a user to easily run a large number of simultaneous simulations from their personal computer. The user-interface includes a custom-built and fully-featured visualization tool for 3D visualization and 2D plotting.</p><p>Hydraulic fracturing simulators must handle a diverse set of coupled physics: mechanics of crack propagation and stress shadowing, fluid flow in the fractures, leakoff, transport of fluid additives that impart non-Newtonian flow characteristics, and proppant transport. Proppant transport is particularly complex because proppant settles out into an immobile bed and may screen out at the tip. Many fracturing simulators approximate wellbore flow effects. However, because these effects are closely coupled to fracturing processes (especially in horizontal wells that have multiple simultaneously propagating fractures), we include a fully meshed, detailed wellbore model in the code, along with treatment of perforation pressure drop and near-wellbore tortuosity.</p><p>In the literature, separate constitutive relations are available to describe transport in open cracks, closed unpropped cracks, and closed propped cracks. However, there were not relations in the literature designed to describe transport under conditions transitional between these end-member states. A general numerical simulator must be able to describe all conditions (and avoid discontinuous changes between equations). To address this limitation, we developed a new set of constitutive equations that can smoothly transition between these end-member states – smoothly handling any general combination of aperture, effective normal stress, saturation, proppant volume fraction, and non-Newtonian fluid rheology (McClure et al., 2020).</p><p>The code solves all equations in a fully coupled way, using an adaptive implicit method. The fully coupled approach is chosen because of the tight coupling between many of the key physical processes. Iterative coupling converges very slowly and/or forces excessively small timesteps when tightly coupled processes are handled with iterative or explicit coupling.</p><p>McClure, Kang, Hewson, and Medam. 2020. ResFrac Technical Writeup (v5). arXiv.</p>

Experience in Optimizing the Location and Parameters of Multistage Hydraulic Fractures for a Multilateral Well Based on Reservoir Simulation

2021 ◽  
Author(s):  
Vil Syrtlanov ◽  
Yury Golovatskiy ◽  
Konstantin Chistikov ◽  
Dmitriy Bormashov
Keyword(s):  
Hydraulic Fracturing ◽  
Reservoir Simulation ◽  
Optimal Placement ◽  
Hydraulic Fractures ◽  
Low Permeability ◽  
Advantages And Disadvantages ◽  
Modeling Methods ◽  
Multistage Hydraulic Fracturing ◽  
Determination Of Parameters

Abstract This work presents the approaches used for the optimal placement and determination of parameters of hydraulic fractures in horizontal and multilateral wells in a low-permeability reservoir using various methods, including 3D modeling. The results of the production rate of a multilateral dualwellbore well are analyzed after the actual hydraulic fracturing performed on the basis of calculations. The advantages and disadvantages of modeling methods are evaluated, recommendations are given to improve the reliability of calculations for models with hydraulic fracturing (HF)/ multistage hydraulic fracturing (MHF).

scholarly journals Method for Visualizing Fractures Induced by Laboratory-Based Hydraulic Fracturing and Its Application to Shale Samples

Energies ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1976 ◽  
Author(s):  
Youqing Chen ◽  
Makoto Naoi ◽  
Yuto Tomonaga ◽  
Takashi Akai ◽  
Hiroyuki Tanaka ◽  
...  
Keyword(s):  
Hydraulic Fracturing ◽  
Ultraviolet Light ◽  
Shale Gas ◽  
Laboratory Method ◽  
Oil Reservoirs ◽  
Thermosetting Resin ◽  
Fluorescent Substance ◽  
New Approach ◽  
Induced Fractures ◽  
Observation Method

A better understanding of the process of stimulation by hydraulic fracturing in shale gas and oil reservoirs is necessary for improving resource productivity. However, direct observation of hydraulically stimulated regions including induced fractures has been difficult. In the present study, we develop a new approach for directly visualizing regions of shale specimens impregnated by fluid during hydraulic fracturing. The proposed laboratory method uses a thermosetting resin mixed with a fluorescent substance as a fracturing fluid. After fracturing, the resin is fixed within the specimens by heating, and the cut sections are then observed under ultraviolet light. Based on brightness, we can then distinguish induced fractures and their surrounding regions impregnated by the fluid from other regions not reached by the fluid. Polarization microscope observation clearly reveals the detailed structures of tortuous or branched fractures on the micron scale and interactions between fractures and constituent minerals. The proposed experimental and observation method is useful for understanding the process of stimulation by hydraulic fracturing and its relationship with microscopic rock characteristics, which is important for fracturing design optimization in shale gas and oil resource development.

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