Reinjection of greenhouse gases into geothermal reservoirs

Kaya, Eylem; Zarrouk, Sadiq J.

doi:10.1016/j.ijggc.2017.10.015

Cited by 45 publications

(9 citation statements)

References 20 publications

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“…Resource and reservoir assessment methods have been examined based on the historical or single-point data for geothermal fields [ 30 , 31 ]. Reservoir risk management may be classified as exploration and management risks at geothermal reservoirs [ 28 ].…”

Section: Importance Of Sustainable Development At Geothermal Power Symentioning

confidence: 99%

“…The reinjection of non-condensable gases into geothermal reservoirs can be a good option to decrease greenhouse gas emissions such as CO 2 and H 2 S, while protecting the reservoir pressure ( Fig. 5 ) and potentially increasing the permeability of the reservoir at depth [ 31 ]. Some geothermal emission abatement methods that may help to increase reservoir pressure after a long production period in a geothermal field have been discussed by researchers.…”

Section: Importance Of Sustainable Development At Geothermal Power Symentioning

confidence: 99%

“…The other approach is to mix non-condensable gases and water at different proportions and send them to the reinjection wells. Kaya and Zarrouk [ 31 ] point out that this approach can work and increase reservoir pressure after 10 years of steam production; however, increasing exploitation may affect steam production. New approaches such as artificial neural networks have begun to be used for reinjection well placement and optimization since the beginning of the 2000s [ 18 , 34 , 35 ].…”

Section: Importance Of Sustainable Development At Geothermal Power Symentioning

confidence: 99%

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The importance of long-term well management in geothermal power systems using fuzzy control: A Western Anatolia (Turkey) case study

Haklidir

2020

Energy

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Effective geothermal power generation depends on two main elements: geothermal reservoir management and maintenance of the power plant. Reservoir management consists of both the fluid production and reinjection of brine to the underground. The management of wells is important to ensure the sustainability of the reservoir. Thus, the flow rate control systems are essential to protect geothermal reservoirs under long-term power production. The second issue is the daily change in electricity prices and the load change process is complex because geothermal well controls are not flexible operations. The well management thus requires control approaches, and fuzzy control can be one effective solution. In this study, a fuzzy control system has been developed to control flow rates of the wells in Kızıldere geothermal field and its performance has been compared with the real data taken from the Kızıldere Power Plant. The results of comparison show that the fuzzy controllers achieved the target energy production in 2 h instead of 5 h, compared to the real data. Based on the real data, the reinjection was only able to stabilize at the end of the fourth hour and the process took only 2 h when using the fuzzy controllers.

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Section: Importance Of Sustainable Development At Geothermal Power Symentioning

confidence: 99%

Section: Importance Of Sustainable Development At Geothermal Power Symentioning

confidence: 99%

Section: Importance Of Sustainable Development At Geothermal Power Symentioning

confidence: 99%

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The importance of long-term well management in geothermal power systems using fuzzy control: A Western Anatolia (Turkey) case study

Haklidir

2020

Energy

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“…Depending on the case study, the water-NCGs interaction can be simplified in the form of water-CO2, water-H2S or the water-CO2-H2S mixture. The full reinjection design is studied by Kaya et al [6], who found that the reinjection of water-NCG mixture increases the reservoir pressure and enhances the early stages of production. Also, Fiaschi et al reported that the content of NCGs remarkably affects the dynamic behavior of the reinjection process and should be precisely considered in the simulation of the reinjection well [7].…”

Section: Introductionmentioning

confidence: 99%

Improved Solubility Model for Pure Gas and Binary Mixture of CO2-H2S in Water: A Geothermal Case Study with Total Reinjection

et al. 2020

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Geothermal energy is acknowledged globally as a renewable resource, which, unlike solar, wind or wave energy, can be continuously exploited. The geothermal fluids usually have some acid gas content, which needs to be precisely taken into account when predicting the actual potential of a power plant in dealing with an effective reinjection. One of the key parameters to assess is the solubility of the acid gas, as it influences the thermodynamic conditions (saturation pressure and temperature) of the fluid. Therefore, an enhanced solubility model for the CO2-H2S-water system is developed in this study, based on the mutual solubility of gases. The model covers a wide range of pressures and temperatures. The genetic algorithm is employed to calculate the correlation constants and corresponding solubility values of both CO2 and H2S as functions of pressure, temperature and the balance of the gas. The results are validated against previously published models and experimental data available in the literature. The proposed model estimates the pure gas solubility, which is also a feature of other models. The more innovative feature of the model is the solubility estimation of each CO2 or H2S in simultaneous presence, such as when the binary gas is injected into the pure water of the geothermal reinjection well. The proposed solubility model fits well with the available experimental data, with a mean deviation lower than 0.2%.

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“…The flaring or venting of associated gas not only causes energy waste but also adversely affects the environment. In contrast, reinjection is a type of treatment method that is beneficial to sustainable development [ 3 , 4 , 5 ]. In some oil fields, associated gas is used as a lift gas to raise oil recovery [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Corrosion Failure Mechanism of Associated Gas Transmission Pipeline

et al. 2018

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Corrosion has been responsible for several gas pipeline leakage accidents; thus, clarifying its failure mechanisms is a precondition to prevent such accidents. On the basis of failure analysis of corroded pipe sections, laboratory exposure tests were conducted by simulating three possible corrosion environments inside a gas pipeline. The corrosion rate indicated by depth change was adopted in this study. Scanning electron microscopy and X-ray diffraction were used to analyze corrosion products. Results showed that the specimens completely immersed in condensate water were generally corroded and that the specimens exposed to gas were locally corroded. However, the corrosion rate of the latter was slightly lower; hence, no autocatalysis of occluded corrosion cell occurred in the formation of corrosion pit, and uniform corrosion occurred in the precipitation location of condensate water. The areas in the range of 5 mm below the waterline indicated severe corrosion, and the rate could reach twice that of other areas. The corrosion products were mainly FeO(OH) and FeCO3, thereby proving that the corrosion failure of pipelines was caused by oxygen absorption corrosion and CO2 corrosion. Suggestions were presented to control corrosion failure of associated gas pipelines.

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Reinjection of greenhouse gases into geothermal reservoirs

Cited by 45 publications

References 20 publications

The importance of long-term well management in geothermal power systems using fuzzy control: A Western Anatolia (Turkey) case study

The importance of long-term well management in geothermal power systems using fuzzy control: A Western Anatolia (Turkey) case study

Improved Solubility Model for Pure Gas and Binary Mixture of CO2-H2S in Water: A Geothermal Case Study with Total Reinjection

Corrosion Failure Mechanism of Associated Gas Transmission Pipeline

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