Geomechanics applications in hydraulic fracturing

Zhang, Jincai

doi:10.1016/b978-0-12-814814-3.00011-3

Cited by 17 publications

(30 citation statements)

References 27 publications

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“…Fracture pressure (FP) is the pressure required to fracture the formation and cause mud loss from the wellbore into the induced fracture. FP is a point where the formation breaks, and Eaton’s Method is used for its calculation. The following equation is used in the calculation FP = PP + ( OB − PP ) ( v 1 − v ) where FP is the fracture pressure and v is Poisson’s Ratio (dimensionless).…”

Section: Materials and Methodsmentioning

confidence: 99%

Carbonate Reservoir Quality Variations in Basins with a Variable Sediment Influx: A Case Study from the Balkassar Oil Field, Potwar, Pakistan

Amjad

Ehsan

Hussain³

et al. 2023

ACS Omega

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The carbonate reservoir quality is strongly reliant on the compaction process during sediment burial and other processes such as cementation and dissolution. Porosity and pore pressure are the two main factors directly affected by mechanical and chemical compactions. Porosity reduction in these carbonates is critically dependent on the overburden stress and subsidence rate. A variable sediment influx in younger basins may lead to changes in the reservoir quality in response to increasing lithostatic pressure. Deposition of molasse sediments as a result of the Himalayan orogeny caused variations in the sedimentation influx in the Potwar Basin of Pakistan throughout the Neogene times. The basic idea of this study is to analyze the carbonate reservoir quality variations induced by the compaction and variable sediment influx. The Sakesar Limestone of the Eocene age, one of the proven carbonate reservoirs in the Potwar Basin, shows significant changes in the reservoir quality, specifically in terms of porosity and pressure. A 3D seismic cube (10 km2) and three wells of the Balkassar field are used for this analysis. To determine the vertical and lateral changes of porosity in the Balkassar area, porosity is computed from both the log and seismic data. The results of both the data sets indicate 2–4% porosities in the Sakesar Limestone. The porosity reduction rate with respect to the lithostatic pressure computed with the help of geohistory analysis represents a sharp decrease in porosity values during the Miocene times. Pore pressure predictions in the Balkassar OXY 01 well indicate underpressure conditions in the Sakesar Limestone. The Eocene limestones deposited before the collision of the Indian plate had enough time for fluid expulsion and show underpressure conditions with high porosities.

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Section: Materials and Methodsmentioning

confidence: 99%

Carbonate Reservoir Quality Variations in Basins with a Variable Sediment Influx: A Case Study from the Balkassar Oil Field, Potwar, Pakistan

Amjad

Ehsan

Hussain³

et al. 2023

ACS Omega

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“…The initial temperature and pore pressure for each simulation case are not stochastically sampled from distributions; instead, they are implicitly related to the depth of the reservoir. Following Zhang [38] and Dowdle and Dobb [39], we use the following equations to assign uniform initial temperature T 0 and initial pore pressure P 0 in terms of depth Z:…”

Section: Generic Reservoir Modelmentioning

confidence: 99%

Machine-learning-assisted high-temperature reservoir thermal energy storage optimization

Jin

Atkinson²,

Doughty³

et al. 2022

Renewable Energy

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“…Effective stress is defined as the stress applied on the porous medium or the total stress minus the product of the pore pressure (fluid pressure) and the effective stress coefficient. In one-dimensional conditions it can be expressed as follows [24,25]:…”

Section: Effective Stressmentioning

confidence: 99%

Geomechanics of Geological Carbon Sequestration

Feng¹,

Shui²

2022

Carbon Sequestration

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Geological Carbon Sequestration (GCS) is an effective way to fight against global warming by capturing and injecting CO2 into geological formations to ensure permanent storage as well as to prevent the environmental and health threats posed by carbon dioxide emissions. Security has been a key factor in the social acceptance of this technology, besides the issues related to economics. From a scientific point of view, the safety issues during CO2 injection and long-term storage are highly related to geomechanics. This chapter provides a basic knowledge of the geomechanical issues involved in the GCS process to increase the understanding of safety issues and to improve the social acceptance of the technology among researchers and those interested in the technology.

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Geomechanics applications in hydraulic fracturing

Cited by 17 publications

References 27 publications

Carbonate Reservoir Quality Variations in Basins with a Variable Sediment Influx: A Case Study from the Balkassar Oil Field, Potwar, Pakistan

Carbonate Reservoir Quality Variations in Basins with a Variable Sediment Influx: A Case Study from the Balkassar Oil Field, Potwar, Pakistan

Machine-learning-assisted high-temperature reservoir thermal energy storage optimization

Geomechanics of Geological Carbon Sequestration

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