The Experts below are selected from a list of 23364 Experts worldwide ranked by ideXlab platform

Mingqiang Wei - One of the best experts on this subject based on the ideXlab platform.

  • blasingame decline type curves with Material Balance pseudo time modified for multi fractured horizontal wells in shale gas reservoirs
    Journal of Natural Gas Science and Engineering, 2016
    Co-Authors: Mingqiang Wei, Yonggang Duan, Mingzhe Dong, Quantang Fang
    Abstract:

    Abstract Production decline analysis has been considered as a robust method to obtain the flow parameters, reservoir properties and original gas in place. Although advanced Blasingame production decline analysis methods for vertical wells, fractured wells and horizontal wells in conventional reservoirs are widely used, there is no Blasingame production decline type curves for multi-fractured horizontal wells (MFHW) with considering stimulated reservoir volume (SRV) in shale gas reservoirs yet. Compared with conventional gas reservoirs, multi-flow mechanisms (such as Darcy flow, diffusion and adsorption/desorption) and complex flow behaviors of MFHW exist in shale gas reservoirs, bringing a big challenge for analyzing the rate decline performance of the wells. Thus, in this paper based on the Material Balance equation in consideration of adsorption/desorption, the Material Balance Pseudo-Time of Blasingame decline type curves is modified so as to extend the theory of Blasingame production decline analysis to shale gas reservoirs. Considering the nonlinearity caused by gas desorption and diffusion, and the complex flow of MFHW, a numerical method is applied in this paper to obtain Blasingame type curves. Based on the perpendicular bisection (PEBI) grids, a numerical model considered SRV is developed and the solution is obtained using control volume finite element method and the fully implicit method. Further Blasingame type curve is validated by a simplify model, and Blasingame production decline type curves of the MFHW considering SRV in a shale gas reservoir are plotted through computer programming. Five flow regimes, including early formation linear flow, early radial flow, compound linear flow, the second radial flow and pseudo-steady flow, are recognized. Compared with the modified Blasingame type curves presented in this paper, the ones with traditional Pseudo-Time have a tendency to underestimate the value of normalized rate, normalized cumulative production, normalized integral derivative cumulative production and the reserve. The effects of relevant parameters including SRV radius, outer region radius, permeability in SRV region and outer region, Langmuir pressure, Langmuir volume and diffusion coefficient on type curves are analyzed as well. This work expands our understanding of a MFHW flow behaviors in shale gas reservoirs, which can be used to estimate with reservoir properties, SRV, and reserves in these types of reservoirs.

Quantang Fang - One of the best experts on this subject based on the ideXlab platform.

  • blasingame decline type curves with Material Balance pseudo time modified for multi fractured horizontal wells in shale gas reservoirs
    Journal of Natural Gas Science and Engineering, 2016
    Co-Authors: Mingqiang Wei, Yonggang Duan, Mingzhe Dong, Quantang Fang
    Abstract:

    Abstract Production decline analysis has been considered as a robust method to obtain the flow parameters, reservoir properties and original gas in place. Although advanced Blasingame production decline analysis methods for vertical wells, fractured wells and horizontal wells in conventional reservoirs are widely used, there is no Blasingame production decline type curves for multi-fractured horizontal wells (MFHW) with considering stimulated reservoir volume (SRV) in shale gas reservoirs yet. Compared with conventional gas reservoirs, multi-flow mechanisms (such as Darcy flow, diffusion and adsorption/desorption) and complex flow behaviors of MFHW exist in shale gas reservoirs, bringing a big challenge for analyzing the rate decline performance of the wells. Thus, in this paper based on the Material Balance equation in consideration of adsorption/desorption, the Material Balance Pseudo-Time of Blasingame decline type curves is modified so as to extend the theory of Blasingame production decline analysis to shale gas reservoirs. Considering the nonlinearity caused by gas desorption and diffusion, and the complex flow of MFHW, a numerical method is applied in this paper to obtain Blasingame type curves. Based on the perpendicular bisection (PEBI) grids, a numerical model considered SRV is developed and the solution is obtained using control volume finite element method and the fully implicit method. Further Blasingame type curve is validated by a simplify model, and Blasingame production decline type curves of the MFHW considering SRV in a shale gas reservoir are plotted through computer programming. Five flow regimes, including early formation linear flow, early radial flow, compound linear flow, the second radial flow and pseudo-steady flow, are recognized. Compared with the modified Blasingame type curves presented in this paper, the ones with traditional Pseudo-Time have a tendency to underestimate the value of normalized rate, normalized cumulative production, normalized integral derivative cumulative production and the reserve. The effects of relevant parameters including SRV radius, outer region radius, permeability in SRV region and outer region, Langmuir pressure, Langmuir volume and diffusion coefficient on type curves are analyzed as well. This work expands our understanding of a MFHW flow behaviors in shale gas reservoirs, which can be used to estimate with reservoir properties, SRV, and reserves in these types of reservoirs.

Shahab Gerami - One of the best experts on this subject based on the ideXlab platform.

  • Microsoft Word - IPTC_11278
    2020
    Co-Authors: Shahab Gerami
    Abstract:

    Abstract Robust techniques for analysis of production data of single porosity gas reservoirs have been developed and widely used for many years. These methods range from the traditional Arp's decline method to modern type-curve matching. The more recent techniques are based on the use of Pseudo-Time for linearization of gas-flow equations, and Material Balance time to account for variable operating conditions. Whereas the governing equation for gas flow in a single porosity reservoir has been successfully linearized using Pseudo-Time evaluated at average reservoir pressure, the linearization of the governing equation in a double porosity reservoir is problematic due to pressure differences between the matrix and fracture systems. Similarly, the suitability of the Material Balance time concept, which has been successfully applied to a single porosity gas reservoir, has not been demonstrated for a double porosity gas reservoir. The purpose of this work is to suggest an appropriate Pseudo-Time and Material-Balance time functions when gas is produced from a naturally fractured gas reservoir. For this purpose, the resulting equations describing the matrix-fracture flow are cast in a form similar to those proposed by Warren and Root. These are then linearized, using appropriately-defined pseudotime and Material-Balance Pseudo-Time functions. The results are compared against those of a commercial numerical simulator for two production scenarios, including constant rate and constant pressure production over some range of reservoir parameters. The results show that Pseudo-Time and Material Balance Pseudo-Time allow the accurate use of traditional double-porosity type-curves for naturally fractured gas reservoirs provided that the gas properties are evaluated at average reservoir pressure as determined from the Material Balance equation for double porosity systems

  • decline curve analysis for naturally fractured gas reservoirs a study on the applicability of pseudo time and Material Balance pseudo time
    Information Processing and Trusted Computing, 2007
    Co-Authors: Shahab Gerami, Mehran Pooladidarvish, Huifang Hong
    Abstract:

    This paper was selected for presentation by an IPTC Programme Committee following review of information contained in an abstract submitted by the author(s). Contents of the paper, as presented, have not been reviewed by the International Petroleum Technology Conference and are subject to correction by the author(s). The Material, as presented, does not necessarily reflect any position of the International Petroleum Technology Conference, its officers, or members. Papers presented at IPTC are subject to publication review by Sponsor Society Committees of IPTC. Electronic reproduction, distribution, or storage of any part of this paper for commercial purposes without the written consent of the International Petroleum Technology Conference is prohibited. Permission to reproduce in print is restricted to an abstract of not more than 300 words; illustrations may not be copied. The abstract must contain conspicuous acknowledgment of where and by whom the paper was presented. Write Librarian, IPTC, P.O. Box 833836, Richardson, TX 75083-3836, U.S.A., fax 01-972-952-9435. Abstract Robust techniques for analysis of production data of single porosity gas reservoirs have been developed and widely used for many years. These methods range from the traditional Arp's decline method to modern type-curve matching. The more recent techniques are based on the use of Pseudo-Time for linearization of gas-flow equations, and Material Balance time to account for variable operating conditions. Whereas the governing equation for gas flow in a single porosity reservoir has been successfully linearized using Pseudo-Time evaluated at average reservoir pressure, the linearization of the governing equation in a double porosity reservoir is problematic due to pressure differences between the matrix and fracture systems. Similarly, the suitability of the Material Balance time concept, which has been successfully applied to a single porosity gas reservoir, has not been demonstrated for a double porosity gas reservoir. The purpose of this work is to suggest an appropriate Pseudo-Time and Material-Balance time functions when gas is produced from a naturally fractured gas reservoir. For this purpose, the resulting equations describing the matrix-fracture flow are cast in a form similar to those proposed by Warren and Root. These are then linearized, using appropriately-defined pseudo- time and Material-Balance Pseudo-Time functions. The results are compared against those of a commercial numerical simulator for two production scenarios, including constant rate and constant pressure production over some range of reservoir parameters. The results show that Pseudo-Time and Material Balance Pseudo-Time allow the accurate use of traditional double-porosity type-curves for naturally fractured gas reservoirs provided that the gas properties are evaluated at average reservoir pressure as determined from the Material Balance equation for double porosity systems.

Yonggang Duan - One of the best experts on this subject based on the ideXlab platform.

  • blasingame decline type curves with Material Balance pseudo time modified for multi fractured horizontal wells in shale gas reservoirs
    Journal of Natural Gas Science and Engineering, 2016
    Co-Authors: Mingqiang Wei, Yonggang Duan, Mingzhe Dong, Quantang Fang
    Abstract:

    Abstract Production decline analysis has been considered as a robust method to obtain the flow parameters, reservoir properties and original gas in place. Although advanced Blasingame production decline analysis methods for vertical wells, fractured wells and horizontal wells in conventional reservoirs are widely used, there is no Blasingame production decline type curves for multi-fractured horizontal wells (MFHW) with considering stimulated reservoir volume (SRV) in shale gas reservoirs yet. Compared with conventional gas reservoirs, multi-flow mechanisms (such as Darcy flow, diffusion and adsorption/desorption) and complex flow behaviors of MFHW exist in shale gas reservoirs, bringing a big challenge for analyzing the rate decline performance of the wells. Thus, in this paper based on the Material Balance equation in consideration of adsorption/desorption, the Material Balance Pseudo-Time of Blasingame decline type curves is modified so as to extend the theory of Blasingame production decline analysis to shale gas reservoirs. Considering the nonlinearity caused by gas desorption and diffusion, and the complex flow of MFHW, a numerical method is applied in this paper to obtain Blasingame type curves. Based on the perpendicular bisection (PEBI) grids, a numerical model considered SRV is developed and the solution is obtained using control volume finite element method and the fully implicit method. Further Blasingame type curve is validated by a simplify model, and Blasingame production decline type curves of the MFHW considering SRV in a shale gas reservoir are plotted through computer programming. Five flow regimes, including early formation linear flow, early radial flow, compound linear flow, the second radial flow and pseudo-steady flow, are recognized. Compared with the modified Blasingame type curves presented in this paper, the ones with traditional Pseudo-Time have a tendency to underestimate the value of normalized rate, normalized cumulative production, normalized integral derivative cumulative production and the reserve. The effects of relevant parameters including SRV radius, outer region radius, permeability in SRV region and outer region, Langmuir pressure, Langmuir volume and diffusion coefficient on type curves are analyzed as well. This work expands our understanding of a MFHW flow behaviors in shale gas reservoirs, which can be used to estimate with reservoir properties, SRV, and reserves in these types of reservoirs.

Mingzhe Dong - One of the best experts on this subject based on the ideXlab platform.

  • blasingame decline type curves with Material Balance pseudo time modified for multi fractured horizontal wells in shale gas reservoirs
    Journal of Natural Gas Science and Engineering, 2016
    Co-Authors: Mingqiang Wei, Yonggang Duan, Mingzhe Dong, Quantang Fang
    Abstract:

    Abstract Production decline analysis has been considered as a robust method to obtain the flow parameters, reservoir properties and original gas in place. Although advanced Blasingame production decline analysis methods for vertical wells, fractured wells and horizontal wells in conventional reservoirs are widely used, there is no Blasingame production decline type curves for multi-fractured horizontal wells (MFHW) with considering stimulated reservoir volume (SRV) in shale gas reservoirs yet. Compared with conventional gas reservoirs, multi-flow mechanisms (such as Darcy flow, diffusion and adsorption/desorption) and complex flow behaviors of MFHW exist in shale gas reservoirs, bringing a big challenge for analyzing the rate decline performance of the wells. Thus, in this paper based on the Material Balance equation in consideration of adsorption/desorption, the Material Balance Pseudo-Time of Blasingame decline type curves is modified so as to extend the theory of Blasingame production decline analysis to shale gas reservoirs. Considering the nonlinearity caused by gas desorption and diffusion, and the complex flow of MFHW, a numerical method is applied in this paper to obtain Blasingame type curves. Based on the perpendicular bisection (PEBI) grids, a numerical model considered SRV is developed and the solution is obtained using control volume finite element method and the fully implicit method. Further Blasingame type curve is validated by a simplify model, and Blasingame production decline type curves of the MFHW considering SRV in a shale gas reservoir are plotted through computer programming. Five flow regimes, including early formation linear flow, early radial flow, compound linear flow, the second radial flow and pseudo-steady flow, are recognized. Compared with the modified Blasingame type curves presented in this paper, the ones with traditional Pseudo-Time have a tendency to underestimate the value of normalized rate, normalized cumulative production, normalized integral derivative cumulative production and the reserve. The effects of relevant parameters including SRV radius, outer region radius, permeability in SRV region and outer region, Langmuir pressure, Langmuir volume and diffusion coefficient on type curves are analyzed as well. This work expands our understanding of a MFHW flow behaviors in shale gas reservoirs, which can be used to estimate with reservoir properties, SRV, and reserves in these types of reservoirs.