Investigation on flow regimes and non-Darcy effect in pressure test analysis of horizontal gas wells

Shahbazi, Sh.; Maarefvand, Parviz; Gerami, Sh.

doi:10.1016/j.petrol.2015.02.034

Cited by 10 publications

(3 citation statements)

References 32 publications

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“…The pressure of Wells 4, 5, and 6 located in the third sub-layer also increased significantly, indicating that the pressure of Well 3 had interfered with the lower, third sub-layer. In summary, the identification results of fracture pressure interference based on pressure interference monitoring data (Shahbazi et al, 2015;Escobar et al, 2021;Seth et al, 2021) suggested that the fracture pressures of Well 3 have vertically interfered with the first, second, and third sub-layers.…”

Section: Pressure Monitoring Technologymentioning

confidence: 99%

Comparative study on the analysis methods of fracture pressure interference in shale oil three-dimensional fracturing

et al. 2022

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Section: Pressure Monitoring Technologymentioning

confidence: 99%

Comparative study on the analysis methods of fracture pressure interference in shale oil three-dimensional fracturing

et al. 2022

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“…Since this phenomenon is more evident around vertical wells [54][55][56], non-Darcy flows in a power function are mainly considered for vertical wells in commercial simulation packages. In contrast, the effect of the non-Darcy flow in horizontal wells has not yet been investigated [57,58]. Since the flow model with second dimensional heterogeneity, anisotropy, and gas diffusion is difficult to solve semianalytically, a temporal scale analysis approach published earlier by our group is used to solve the model.…”

Section: Introductionmentioning

confidence: 99%

Temporal Scale Analysis of Gas Flow in Tight Gas Reservoirs considering the Nonequilibrium Effect

Husein

et al. 2021

Geofluids

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The fractal geometry, anisotropy, discontinuity, and non-Darcy flow of tight reservoirs exert a significant effect on well production performance. In this study, the reservoir fractal geometry is represented by exponential functions on the basis of microseismic data, while the discontinuity of the fractures is presented as a nonequilibrium effect. The impact of the nonequilibrium effect and the low velocity non-Darcy flow on the temporal scale of the wellbore pressure is predicted herein. Results showed that the time scale analysis accurately simulates gas flow in a tight reservoir. The wellbore pressure gradually increases, whereas the pressure in the matrix lags when the nonequilibrium effect is considered. The wellbore pressure is affected in the early period by the nonequilibrium effect. However, at the later stage, the pressure in the matrix is mainly affected by the non-Darcy flow. When the non-Darcy flow is dominant, the pores without gas flowing through are better presented.

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“…The pressure data versus time are recorded and analysed to predict the performance of the well. Appropriated well testing methods in which their main goal is to have the best match between the recorded pressure data and some ideal reservoir models can be used to evaluate well performance (SadeghiBoogar and Masihi, 2010;Onur and Kuchuk, 2012;Ghaffarian et al 2014;Cho et al 2013;Vaferi et al 2015;Shahbazi et al 2015). Rosa and Horne (1997) investigated the discontinuities in permeability in the reservoir using a cyclic stimulation on an active well.…”

Section: Introductionmentioning

confidence: 99%

Analysis of infl ow performance relationship and reservoir characteristics using Saphir software

Shokri¹,

Azdarpour²,

Honarvar³

2017

Biosci. Biotech. Res. Comm

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Petroleum production from the reservoir is initially occurs by the natural energy of the reservoir itself. The reservoir pressure is usually high at the early stage of reservoir life, thus, it pumps crude oil to the surface. However, after some time of production, reservoir pressure starts to decline. In addition, penetration of solid particles into the pores causes plugging and results in formation permeability reduction. Hence, natural production from the reservoir starts to decrease after some time, depending on pressure drop rate and the degree of damage to the formation. Well testing is one of the practical methods for analysing the well. Pressure build up test is one of the most widely used well testing methods for analysing the well. In this study, a pressure build up test was conducted for 24 hours and then the pressure data were analysed using Saphir software. Finally, the well characteristics were used to analyse the infl ow performance relationship (IPR) of the well. The well testing results showed that the well suffers from high skin, which hinders the effective production from the reservoir. In addition, IPR analysis using Vogel's and Darcy's method showed that the absolute open fl ow (AOF) is affected by the skin factor. The resulted AOF was always higher without the effect of skin factor included.

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Investigation on flow regimes and non-Darcy effect in pressure test analysis of horizontal gas wells

Cited by 10 publications

References 32 publications

Comparative study on the analysis methods of fracture pressure interference in shale oil three-dimensional fracturing

Comparative study on the analysis methods of fracture pressure interference in shale oil three-dimensional fracturing

Temporal Scale Analysis of Gas Flow in Tight Gas Reservoirs considering the Nonequilibrium Effect

Analysis of infl ow performance relationship and reservoir characteristics using Saphir software

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