Rock Evaluation and Wellbore Stability0
Figure 5: Description of the main phenomena occurring during the propagation of the self-pyrolysis front.

A Novel Energy-Efficient Pyrolysis Process: Self-pyrolysis of Oil Shale Triggered by Topochemical Heat in a Horizontal Fixed Bed

Rock Evaluation and Wellbore Stability
Fig. 1. Schematic diagram of a Helmholtz pulse grinding bit. Note: 1. Internal grinding chamber; 2. Accelerating chamber; 3. Mixing chamber; 4. Swabbing chamber; 5. Lower jet channel; 6. Helmholtz oscillation chamber; 7. Diffusion chamber; 8. Internal grinding machine; 9. Throat; 10. Reverse high-speed flow channel.

Design and hydraulic modeling of pulse grinding bits for horizontal wells
Rock Evaluation and Wellbore Stability
Figure 24. SEM pictures of the shale. (a) Original shale magnified by 2400 times; (b) Shale contacted with nano-SiO2 in PTT magnified by 2400 times; (c) Original shale magnified by 30,000 times; and (d) Shale contacted with nano-SiO2 in PTT magnified by 30,000 times.

2D Numerical Simulation of Improving Wellbore Stability in Shale Using Nanoparticles Based Drilling Fluid
Others
Fig. 2 EU MS shale gas deposits map. Source: International Energy Agency KPMG, press reports (2012)

The legal and regulatory framework for the EU’ shale gas exploration and production regulating public health and environmental impacts

Flow Mechanics0
Fig. 21 3-D dynamic pressure depletion.

Modeling and simulation of gas flow behavior in shale reservoirs

Others

Simulation and visualization of the displacement between CO2 and formation fluids at pore-scale levels and its application to the recovery of shale gas
Hydrulic Fracture
Fig. 2 Geometric model of the fractured shale gas reservoir.

Production forecast of fractured shale gas reservoir considering multi-scale gas flow
Others

Prospect of shale gas recovery enhancement by oxidation-induced rock burst

Others0
Fig. 2. Photos of a gas-tight thread.

Development of gas-tight threads based on API round threads and its evaluation

Hydrulic Fracture
Hydraulic fracturing is widely used in the petroleum industry to enhance oil and gas production, especially for the extraction of shale gas from unconventional reservoirs. A good understanding of the vertical distance which should be preserved between hydraulic stimulation and overlying aquifers

Horizontal respect distance for hydraulic fracturing in the vicinity of existing faults in deep geological reservoirs: a review and modelling study
Hydrulic Fracture
The Lower Permian reservoirs in the western Sichuan Basin are ultra-deep with high temperature, high pressure and developed natural fractures. Leakage and contamination of drilling fluid is the main factor restricting reservoir stimulation effects, so the acidification will be the solution also as the first choice to enhance the gas recovery. In view of this, an acidification design was proposed to minimize the contamination skin factor to the highest degree.

An optimal design of network-fracture acidification for ultra-deep gas wells in the Lower Permian strata of the western Sichuan Basin
Hydrulic Fracture
Fig. 1 Sketch of calculation model

Numerical simulation of hydraulic fracture propagation in tight oil reservoirs by volumetric fracturing

Shale Basic Knowledge

Unconventional fields only produce hydrocarbons cost-effectively through stimulation treatments to large-scale, due to this, the determination of the mechanical properties of the formation and its variation along the same recover a greater importance in these "reservoirs" since these allow us to determine the degree of fracturability of the formation, select the optimal orientation of the wells and designing the fracture treatment. .shale formation modeling in a simulation through information acquired with seismic and well logs.

How to evaluate a shale play? Part B

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HOW TO EVALUATE A SHALE PLAY? Part B Emanuel Martin In the first part of “HOW TO EVALUATE A SHALE PLAY?" we've developed: Shale play features, Main properties

is required to know the values of porosity, water saturation, permeability, reservoir volume and the volumetric factor of the gas or oil; the Total Organic Carbon (TOC), thermal maturity, depositional environment, mineralogical composition and mechanical properties.

How to evaluate a shale play? Part A

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How to evaluate a shale play? Part A Emanuel Martin Introduction Shale formations constitute 60% of the rocks that make up the Earth's crust being only a small group

Pores in shale plays

WHERE IS THE GAS STORED? Shale Pores

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Michigan Department of Environmental Quality website. Slurry blender, pump truck, proppant, van, Wellhead, Allaboutshale.com, shale handbook.

WHAT IS HYDRAULIC FRACTURING? PART B

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Hydraulic Fracturing also known as fracking or fracing is a wells stimulation technique developed in 1947 by Stanolind Oil and aims to increase the drainage area and the performance of the same through the creation of fractures in the productive formation.

What is hydraulic fracturing? part A

1
Gray Shale rock from Vaca Muerta Formation, Neuquén, Argentina.

WHAT IS A SHALE?

0

Flow Mechanics

Fig. 21 3-D dynamic pressure depletion.

Modeling and simulation of gas flow behavior in shale reservoirs

0

This result has been further compared with the help of MATLAB so as to obtain a complete pressure-derived model. The result shows the applicability of

Hydraulic extended-reach limit (HERL) model of horizontal extended-reach well (ERW) can predict the maximum measured depth (MMD) of the horizontal ERW. The HERL refers to the well’s MMD when drilling fluid cannot be normally circulated by drilling pump. Previous model analyzed the following two constraint conditions, drilling pump rated pressure and rated power. However, effects of the allowable range of drilling fluid flow rate (Qmin≤Q≤Qmax) were not considered. In this study, three cases of HERL model are proposed according to the relationship between allowable range of drilling fluid flow rate and rated flow rate of drilling pump (Qr). A horizontal ERW is analyzed to predict its HERL, especially its horizontal-section limit

A Comprehensive Prediction Model of Hydraulic Extended-Reach Limit Considering the Allowable Range of Drilling Fluid Flow Rate in Horizontal Drilling

0
In order to investigate the influence on shale gas well productivity caused by gas transport in nanometer-size pores, a mathematical model of multi-stage fractured horizontal wells in shale gas reservoirs is built, which considers the influence of viscous flow, Knudsen diffusion, surface diffusion, and adsorption layer thickness. A discrete-fracture model is used to simplify the fracture modeling, and a finite element method is applied to solve the model.

Influence of gas transport mechanisms on the productivity of multi-stage fractured horizontal wells in shale gas reservoirs

0
The Lattice Boltzmann method can be used to study the flow field in the micropore spaces and then provides numerical solutions even in complex pore structure models. Understanding the transport characteristics and establishing a way to estimate potential gas flow is very important to guide shale gas reserve estimation and recovery schemes.

Investigation of shale gas microflow with the Lattice Boltzmann method

0
Study of Gas Flow Characteristics in Tight Porous Media with a Microscale Lattice Boltzmann Model

Study of Gas Flow Characteristics in Tight Porous Media with a Microscale Lattice Boltzmann Model

0

Hydrulic Fracture

Fig. 2 Geometric model of the fractured shale gas reservoir.

Production forecast of fractured shale gas reservoir considering multi-scale gas flow

0

This numerical model employs Langmuir adsorption equation to present the influence of desorption gas in matrix and considers the Klinkenberg effect in matrix and natural

Hydraulic fracturing is widely used in the petroleum industry to enhance oil and gas production, especially for the extraction of shale gas from unconventional reservoirs. A good understanding of the vertical distance which should be preserved between hydraulic stimulation and overlying aquifers

Horizontal respect distance for hydraulic fracturing in the vicinity of existing faults in deep geological reservoirs: a review and modelling study

0

This must be an important consideration for setting the guidelines for operational procedures by legislative authorities. We investigate the respect distance using a Monte Carlo

The Lower Permian reservoirs in the western Sichuan Basin are ultra-deep with high temperature, high pressure and developed natural fractures. Leakage and contamination of drilling fluid is the main factor restricting reservoir stimulation effects, so the acidification will be the solution also as the first choice to enhance the gas recovery. In view of this, an acidification design was proposed to minimize the contamination skin factor to the highest degree.

An optimal design of network-fracture acidification for ultra-deep gas wells in the Lower Permian strata of the western Sichuan Basin

0
Fig. 1 Sketch of calculation model

Numerical simulation of hydraulic fracture propagation in tight oil reservoirs by volumetric fracturing

0
Multi-stage hydraulic fracturing of horizontal wells is the main stimulation method in recovering gas from tight shale gas reservoirs, and stage spacing determination is one of the key issues in fracturing design. The initiation and propagation of hydraulic fractures will cause stress redistribution and may activate natural fractures in the reservoir.

Stress redistribution in multi-stage hydraulic fracturing of horizontal wells in shales

0
Fig. 2 Overview of the static model

Modeling hydraulic fractures in finite difference simulators using amalgam local grid refinement (LGR)

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Others

Fig. 2 EU MS shale gas deposits map. Source: International Energy Agency KPMG, press reports (2012)

The legal and regulatory framework for the EU’ shale gas exploration and production regulating public health and environmental impacts

0

Simulation and visualization of the displacement between CO2 and formation fluids at pore-scale levels and its application to the recovery of shale gas

0

Prospect of shale gas recovery enhancement by oxidation-induced rock burst

0
Fig. 2. Photos of a gas-tight thread.

Development of gas-tight threads based on API round threads and its evaluation

0
Figure 1. The relationship between shale gas and other types of oil and gas reservoir (revised from Schenk C. J. & Pollastro R. M., 2001 [5] ).

Comparative Study and Analysis of the Development of Shale Gas between China and the USA

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Figure 2. Well network profile of microwave heating.

Development of Radio Frequency Heating Technology for Shale Oil Extraction

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