The Experts below are selected from a list of 1035 Experts worldwide ranked by ideXlab platform
William W Weiss - One of the best experts on this subject based on the ideXlab platform.
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wettability alteration to increase Deliverability of Gas production wells
Journal of Natural Gas Science and Engineering, 2009Co-Authors: Mukul M. Sharma, William W WeissAbstract:Abstract More than 17,000 Gas storage wells in the U.S. annually lose about 5% of their Deliverability (i.e., injectivity and productivity). A common problem is believed to be water blockage around the wellbore. For strongly water-wet Gas reservoirs, capillary forces promote the retention of water in pore spaces, which in turn curtails the flow of Gas in and out of the storage wells. This paper reports the use of surfactants to change the water-wetness of a Gas reservoir in order to increase Gas Deliverability. Surfactant treatment can alter the strong water-wetness of the rock around wellbore to a neutral-wet condition, thus reducing water retention and improving Gas flow. The objective of this laboratory study was to demonstrate improved Gas Deliverability by altering the wettability of core samples with proper chemicals from strongly water-wet to neutral-wet. Seven chemicals were screened for efficacy of changing the wettability of strongly water-wet glass capillary tubes. Following the capillary rise tests two surfactants were selected for the core sample experiments. Rock samples and water from the St. Peter formation, a sandstone aquifer Gas storage reservoir, have been tested. Spontaneous imbibition tests of reservoir cores were used to evaluate the wettability before and after surfactant treatment. The cores saturated with either initial formation water or surfactant solutions were displaced with wet nitrogen Gas. Gas relative permeability was measured. A decrease in the trapped water saturation caused an increase in Gas permeability. This increase indicated improved Gas Deliverability that resulted from wettability alteration away from very strongly water-wet conditions. Laboratory results demonstrated that reducing the water-wetness increased permeability and improved the Deliverability of Gas from the cores. This technique provides a cost-effective method to increase Gas Deliverability in fields where water blocking is a major factor in decreased Gas Deliverability.
Scott P Stevens - One of the best experts on this subject based on the ideXlab platform.
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an optimization model for planning natural Gas purchases transportation storage and Deliverability
Omega-international Journal of Management Science, 1996Co-Authors: Anthony E Bopp, Vijay R Kannan, Susan W Palocsay, Scott P StevensAbstract:Natural Gas local distribution companies (LDCs) face the problem of managing natural Gas purchases under conditions of uncertain demand and frequent price change. In this paper, we present a stochastic optimization model to solve this problem. Unlike other models, this model explicity considers Deliverability, the rate at which Gas can be added to and withdrawn from a storage facility, as a variable, and considers its role in ensuring a secure supply of Gas. Deliverability is often overlooked in Gas supply planning, yet is a critical factor in achieving a secure Gas supply. Using data from an LDC in Huntsville, Alabama, we show how this model can be used to minimize total cost while meeting constraints regarding the security of Gas supply. We also demonstrate that security is dependent on the rate of Deliverability, which in turn is affected by a number of factors including Gas availability, storage and transportation considerations, and weather conditions.
Mukul M. Sharma - One of the best experts on this subject based on the ideXlab platform.
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wettability alteration to increase Deliverability of Gas production wells
Journal of Natural Gas Science and Engineering, 2009Co-Authors: Mukul M. Sharma, William W WeissAbstract:Abstract More than 17,000 Gas storage wells in the U.S. annually lose about 5% of their Deliverability (i.e., injectivity and productivity). A common problem is believed to be water blockage around the wellbore. For strongly water-wet Gas reservoirs, capillary forces promote the retention of water in pore spaces, which in turn curtails the flow of Gas in and out of the storage wells. This paper reports the use of surfactants to change the water-wetness of a Gas reservoir in order to increase Gas Deliverability. Surfactant treatment can alter the strong water-wetness of the rock around wellbore to a neutral-wet condition, thus reducing water retention and improving Gas flow. The objective of this laboratory study was to demonstrate improved Gas Deliverability by altering the wettability of core samples with proper chemicals from strongly water-wet to neutral-wet. Seven chemicals were screened for efficacy of changing the wettability of strongly water-wet glass capillary tubes. Following the capillary rise tests two surfactants were selected for the core sample experiments. Rock samples and water from the St. Peter formation, a sandstone aquifer Gas storage reservoir, have been tested. Spontaneous imbibition tests of reservoir cores were used to evaluate the wettability before and after surfactant treatment. The cores saturated with either initial formation water or surfactant solutions were displaced with wet nitrogen Gas. Gas relative permeability was measured. A decrease in the trapped water saturation caused an increase in Gas permeability. This increase indicated improved Gas Deliverability that resulted from wettability alteration away from very strongly water-wet conditions. Laboratory results demonstrated that reducing the water-wetness increased permeability and improved the Deliverability of Gas from the cores. This technique provides a cost-effective method to increase Gas Deliverability in fields where water blocking is a major factor in decreased Gas Deliverability.
Anthony E Bopp - One of the best experts on this subject based on the ideXlab platform.
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an optimization model for planning natural Gas purchases transportation storage and Deliverability
Omega-international Journal of Management Science, 1996Co-Authors: Anthony E Bopp, Vijay R Kannan, Susan W Palocsay, Scott P StevensAbstract:Natural Gas local distribution companies (LDCs) face the problem of managing natural Gas purchases under conditions of uncertain demand and frequent price change. In this paper, we present a stochastic optimization model to solve this problem. Unlike other models, this model explicity considers Deliverability, the rate at which Gas can be added to and withdrawn from a storage facility, as a variable, and considers its role in ensuring a secure supply of Gas. Deliverability is often overlooked in Gas supply planning, yet is a critical factor in achieving a secure Gas supply. Using data from an LDC in Huntsville, Alabama, we show how this model can be used to minimize total cost while meeting constraints regarding the security of Gas supply. We also demonstrate that security is dependent on the rate of Deliverability, which in turn is affected by a number of factors including Gas availability, storage and transportation considerations, and weather conditions.
Vijay R Kannan - One of the best experts on this subject based on the ideXlab platform.
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an optimization model for planning natural Gas purchases transportation storage and Deliverability
Omega-international Journal of Management Science, 1996Co-Authors: Anthony E Bopp, Vijay R Kannan, Susan W Palocsay, Scott P StevensAbstract:Natural Gas local distribution companies (LDCs) face the problem of managing natural Gas purchases under conditions of uncertain demand and frequent price change. In this paper, we present a stochastic optimization model to solve this problem. Unlike other models, this model explicity considers Deliverability, the rate at which Gas can be added to and withdrawn from a storage facility, as a variable, and considers its role in ensuring a secure supply of Gas. Deliverability is often overlooked in Gas supply planning, yet is a critical factor in achieving a secure Gas supply. Using data from an LDC in Huntsville, Alabama, we show how this model can be used to minimize total cost while meeting constraints regarding the security of Gas supply. We also demonstrate that security is dependent on the rate of Deliverability, which in turn is affected by a number of factors including Gas availability, storage and transportation considerations, and weather conditions.
