Laboratory Study of Hydraulic Fracturing Behavior in Unconsolidated Sands for Methane Hydrate Production

2008 ◽  
Author(s):  
Takatoshi Ito ◽  
Akira Igarashi ◽  
Kiyofumi Suzuki ◽  
Sadao Nagakubo ◽  
Maki Matsuzawa ◽  
...  
Keyword(s):  
Hydraulic Fracturing ◽  
Laboratory Study ◽  
Methane Hydrate ◽  
Unconsolidated Sands

scholarly journals Laboratory Experiments of Hydraulic Fracturing in Unconsolidated Sands

2011 ◽  
Vol 127 (6_7) ◽  
pp. 243-248 ◽  
Author(s):  
Takatoshi ITO ◽  
Akira IGARASHI ◽  
Koji YAMAMOTO
Keyword(s):  
Hydraulic Fracturing ◽  
Laboratory Experiments ◽  
Unconsolidated Sands

Laboratory Study of Hydraulic Fracturing

1981 ◽  
Vol 107 (6) ◽  
pp. 713-732 ◽  
Author(s):  
Gary W. Jaworski ◽  
James M. Duncan ◽  
H. Bolton Seed
Keyword(s):  
Hydraulic Fracturing ◽  
Laboratory Study

Laboratory study of Hydraulic Fracture interaction with artificial interfaces.

2020 ◽  
Author(s):  
Anna Shevtsova ◽  
Egor Filev ◽  
Maria Bobrova ◽  
Sergey Stanchits ◽  
Vladimir Stukachev
Keyword(s):  
Hydraulic Fracturing ◽  
Laboratory Study ◽  
Deformation Monitoring ◽  
Unconventional Reservoirs ◽  
Fluid Viscosity ◽  
Natural Fractures ◽  
Bedding Planes ◽  
Hf Propagation ◽  
Fracture Interaction ◽  
Series Of Experiments

<p>Nowadays Hydraulic Fracturing (HF) is one of the most effective stimulation technique for hydrocarbon extraction from unconventional reservoirs, as well as enhanced geothermal applications. Practical applications of HF can have different aims. In one case, we need to stop cracks inside the host rock to avoid some HF breakthroughs into other formations and possible groundwater pollutions. The second situation is when we need to fracture several bedding planes in a reservoir which has a complex structure, especially in case of the presence of multiple natural fractures in unconventional reservoir. It is important to study hydraulic fracturing, its propagation and conditions of interaction with interfaces in laboratory conditions before expensive field application.</p><p>The present work demonstrates the results of a laboratory study designed to understand fracture interaction with artificial interfaces. For the first series of experiments, we used some natural materials such as shales, sandstones, dolomites and limestones with different porosity, permeability and mechanical properties. During these experiments we initiated hydraulic fracturing in homogeneous specimens with and without artificial surfaces, modelling natural fractures or bedding planes in unconventional reservoirs. For the second series of experiments, we used a combination of different materials to understand HF propagation in heterogeneous media, to study conditions of HF crossing or arrest at the boundaries between different types of rock. These laboratory experiments were done to create HF simulating natural processes in fractured and heterogeneous rocks or reservoirs.</p><p>Series of hydraulic fracturing experiments under uniaxial load conditions were conducted using the multifunctional system MTS 815.04. Before testing, samples were scanned by 3D CT System to characterize the rock fabric, and after testing, CT scanning was repeated to characterize 3D shape of created HF. The dynamics of HF initiation and propagation was monitored by Acoustic Emission (AE) technique, using piezoelectric sensors glued to the surface of the rock to record elastic waves radiated during the process of HF propagation. The experiments were made with different injection rates and fluid viscosities. Changes in radial strain, injection pressure and microseismic data over time were recorded.</p><p>As the result, these experiments indicate significant factors (rock heterogeneity, porosity, permeability, fluid viscosity and injection rate), influencing cracks initiation, propagation or arrest on the artificial interface. The fracture propagation and opening are characterized by measured radial deformation, fluid pressure and geometrical orientation in the sample volume. The experiments demonstrated, that fracture easily crossed artificial surface in the homogeneous limestone samples. And cracks initiated in limestone were arrested on the border with shale. In all cases combination of the AE and deformation monitoring allows to indicate fracture initiation, propagation and arrest.</p>

scholarly journals LABORATORY STUDY OF SAND SAMPLES CONTAINING METHANE HYDRATE OF NON-CEMENTING TYPE

2019 ◽  
pp. 41-50
Author(s):  
G. A. Dugarov ◽  
A. A. Duchkov ◽  
A. D. Duchkov ◽  
A. Yu. Manakov ◽  
K. E. Kuper ◽  
...  
Keyword(s):  
Laboratory Study ◽  
Methane Hydrate ◽  
Acoustic Properties ◽  
Laboratory Research

The approach to the formation of sand samples containing methane hydrate of a non-cementing type is studied. The approach is to inject methane-rich water in the sample after formation of methane hydrate by the "excess gas" method. Laboratory research is carried out on a specialized setup that allows to form hydrate -bearing samples and to study their acoustic properties during the experiments. The results are compared with the data of previous experiments on sand samples containing tetrahydrofuran (THF) and methane hydrate formed by the "excess gas" method. It is shown that the studied approach allow to form samples containing methane hydrate of a non-cementing type.

scholarly journals Investigation of the dissipative structures following microseismic diffusion during hydraulic fracturing of methane-hydrate-bearing sand

2021 ◽  
Vol 230 ◽  
pp. 01015
Author(s):  
Victor Nazimko ◽  
Olga Pidgurna ◽  
Olexiy Kusen
Keyword(s):  
Hydraulic Fracturing ◽  
Methane Hydrate ◽  
Thermodynamic System ◽  
Dissipative Structures ◽  
Explicit Calculation ◽  
Structure Evolution ◽  
Liquid Injection ◽  
New Findings ◽  
Hydrate Deposit ◽  
Open Thermodynamic System

Hydraulic fracturing is a prospective technology for methane hydrate deposit exploitation. The evolution of hydraulically stimulated fractures around the point of liquid injection is simulated. For this purpose, the FLAC3D computer model is used because of its explicit calculation cycle that imitates real physics, prevents numerical instability, and reproduces a realistic path during simulation of the nonlinear rock massif behavior. The results of the simulation provide for new findings, namely, the spatial asymmetry and synchronism violation, spatial deviation, discontinuity, and recurrence during microseismic diffusion, which follow the process of hydraulic fracturing. In addition, dissipative structures were developed due to entropy production, since gas hydrate strata are an open thermodynamic system, which transforms and dissipates the energy of the injected liquid. The process of dissipative structure evolution should be controlled to enhance the gas yield from the hydrates.

Closure to “Laboratory Study of Hydraulic Fracturing”

1982 ◽  
Vol 108 (11) ◽  
pp. 1503-1506
Author(s):  
Gary W. Jaworski ◽  
H. Bolton Seed ◽  
James M. Duncan
Keyword(s):  
Hydraulic Fracturing ◽  
Laboratory Study
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