Application of Heat Treatment to Enhance Permeability In Tight Gas Reservoirs

Jamaluddin, A.K.M.; Bennion, D.B.; Thomas, F.B.; Ma, T.

doi:10.2118/98-01

Cited by 7 publications

(10 citation statements)

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“…Similar studies also suggests thermal stimulation of shale gas reservoirs can result in effective permeability improvement just like in oil shales (Busch and Amann-Hildenbrand, 2013;Sanmiguel et al, 2002). According to Jamaluddin et al(2000) thermal treatments in tight gas reservoirs enhances the permeability of the formation by vaporizing the capillary blocked water, dehydrating the clay bound water and creating thermally induced micro-fractures. Their studies demonstrated increase in permeability as much as over 50%…”

Section: Introductionmentioning

confidence: 75%

Thermal simulation of shale gas recovery involving the use of microwave heating

Fianu

Gholinezhad

Hassan

2020

Journal of Petroleum Science and Engineering

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Section: Introductionmentioning

confidence: 75%

Thermal simulation of shale gas recovery involving the use of microwave heating

Fianu

Gholinezhad

Hassan

2020

Journal of Petroleum Science and Engineering

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“…Based on experimental results reported in the literature, various temperatures were selected to evaluate the effect of temperature on clay materials, as described in Table 1 (3,(10)(11)(12) .…”

Section: Formation Heat Treatment Backgroundmentioning

confidence: 99%

“…In order to validate the effects of formation heating treatment, Jamaluddin, et al (10) carried out a series of bench-scale heating tests on sandstone cores taken from both oil and gas reservoirs to determine the effect of heating on permeability, fluid saturation, and mineralogy. Jamaluddin, et al found that, at treatment temperatures of 120˚ C, the conditions did not change.…”

Section: Formation Heat Treatment Backgroundmentioning

confidence: 99%

Formation Heat Treatment Process by Combustion of Gases Around the Wellbore

Sanmiguel

Mallory

Mehta

et al. 2002

Journal of Canadian Petroleum Technology

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Formation damage can occur at any stage during the lifetime of a well. Operations such as drilling, completion, workovers, and stimulations expose the formation to fluids that may be almost all incompatible with the formation and its original fluids. These situations can cause a reduction in the permeability of the formation around the well bore, and/or a reduction in the production of fluids. A detailed description of the formation damage mechanisms is presented in the literature (1,2) .New methods have been developed to counteract formation damage and, in doing so, improve injectivity. One of these methods is formation heating. The aim of formation heating is to increase the temperature of the formation around the well-bore in order to improve the hydrodynamic conditions in the near wellbore area. A popular field application technique of formation heating is the utilization of a down-hole electrical heater. The heater is placed as close as possible to the target zone, and an inert gas, such as nitrogen, is co-injected through the annulus. Using this method, the temperature of the injected gas may rise to as high as 800˚ C before entering into the formation (3) . The big inconvenience of this method is the large energy requirements associated with it.Another remediation technique is the use of a down-hole gas burner. Using this method, hot flue gases are injected into the formation. The main concern with down-hole gas burners is the lack of combustion control, corrosion, and the requirement of specialized and expensive equipment (4) .The utilization of a radio frequency (RF) antenna, as a heating system for enhanced oil recovery, is another remediation technique (5) . Electrical heating tools and their applications can be divided in into three categories: (1) low frequency currents are used in resistive/ohmic heating. (2) high frequency currents are used in microwave heating methods. (3) induction tools utilize electrical energy to inductively heat the reservoir through the ferro-magnetic casing (6,7) . Using these techniques, the increase in temperature of the formation is not enough to vapourize water and, as a result, their application will only result in heating the oil in the near-wellbore area.A technique called combustion stimulation was proposed and used in the 1960s (4,8,9) . Using this method, a combustion front is initiated in the well-bore by means of a heater or burner, and the front is propagated into the formation to a distance of 3 m to 6 m. As a result, the formation in this zone is reduced to clean, burned sand, offering very little resistance to fluid production.Research on the combustion of gases in porous media at the University of Calgary is being carried out with the potential of applying this concept to the process of formation heating. Gaseous combustible mixtures may be injected in a uniform distribution over the sand face, ensuring a uniform treatment, and allowing for a uniform modification of structural and fluid mechanical properties. In the field, this process can be initiated by t...

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“…12,17 Heat treatment technology can be further categorized according to different methods into resistance heating, high-temperature steam injection, and electromagnetic heating. 13,18,19 Fracturing technology improves the connectivity of the reservoir by forming artificial fracture networks through mechanical stress. Although it initially solves the problem of low production, water blocking occurs when shale rich in clay minerals interacts with water.…”

Section: ■ Introductionmentioning

confidence: 99%

Evolution of Shale Microstructure under in Situ Heat Treatment: Synchrotron Small-Angle X-ray Scattering

Zhang

Sun

et al. 2021

Energy Fuels

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Shale gas reservoirs are characterized by low porosity and low permeability which inhibits their large-scale commercial development. This has fueled research into the enhancement of gas recovery from shale reservoirs. In this study, a new method of increasing gas production by heating is proposed. Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) were used to analyze the mass loss curve and enthalpy change of shale during heating. The phase state changes of mineral composition during heating of organic-rich shale were also obtained. The pore distribution of shale samples during heat treatment was compared by using small-angle X-ray scattering technology, and the influence of heat on shale pore structure was analyzed. The results show that the thermal effect accelerates the increase in the number and size of micro-/nanopores in shale samples. This effectively improves the permeability of shale samples and induces the free migration of gas. In addition, the difference in the specific heat capacity of each mineral in shale samples will cause an inhomogeneous temperature distribution. Thermal stress causes the fracture of mineral crystals in shale, and the shrinkage between mineral particles causes the development of fractures in the shale matrix, which improves the shale gas reservoir permeability. Hence, in situ heat treatment is an efficient stimulation method for enhancing shale gas recovery.

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Application of Heat Treatment to Enhance Permeability In Tight Gas Reservoirs

Cited by 7 publications

References 0 publications

Thermal simulation of shale gas recovery involving the use of microwave heating

Thermal simulation of shale gas recovery involving the use of microwave heating

Formation Heat Treatment Process by Combustion of Gases Around the Wellbore

Evolution of Shale Microstructure under in Situ Heat Treatment: Synchrotron Small-Angle X-ray Scattering

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