Productivity and Drainage Area of Fractured Horizontal Wells in Tight Gas Reservoirs

Medeiros, Flavio; Özkan, Erdal; Kazemi, Hossein

doi:10.2118/108110-ms

Cited by 49 publications

(34 citation statements)

References 27 publications

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“…(2) Format has a good compatibility with the oilfield commonly used polymer, and can slow the speed of hydrolysis and oxidation degradation of many thickeners and filtrate reducers under high temperature and pressure [7][8][9][10][11][12].…”

Section: Formate Fluidsmentioning

confidence: 99%

Evaluation of Thermal Stability by Comparison of Potassium Chloride and Potassium/Sodium Formate Fluids

Davarpanah¹,

Zarei²,

Razmjoo³

2017

J Environ Anal Toxicol

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Section: Formate Fluidsmentioning

confidence: 99%

Evaluation of Thermal Stability by Comparison of Potassium Chloride and Potassium/Sodium Formate Fluids

Davarpanah¹,

Zarei²,

Razmjoo³

2017

J Environ Anal Toxicol

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“…They established a multi-fractured horizontal well model by treating the simulated area around hydraulic fracture stages as a dual-porosity medium. The correctness of the model was verified by comparing it with the semi-analytical solutions obtained by Medeiros et al (2007). Thereafter, the trilinear flow model has been widely used to investigative the dynamic characteristics of MFHWs in unconventional reservoirs (Ozcan et al 2014;Gao 2014;Wei et al 2015;Wang et al 2015;Chen et al 2016;Wang et al 2016aWang et al , 2016b.…”

Section: Introductionmentioning

confidence: 98%

Analytical model for pressure and rate analysis of multi-fractured horizontal wells in tight gas reservoirs

Huang

Yao

et al. 2018

J Petrol Explor Prod Technol

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Multi-fractured horizontal wells (MFHWs) are effective for developing unconventional reservoirs. A complex fracture network around the well and hydraulic fractures form during fracturing. Hydraulic fractures and fracture network are sensitive to the effective stress. However, most existing models do not consider the effects of stress sensitivity. In this study, a new analytical model was established for an MFHW in tight gas reservoirs based on the trilinear flow model. Fractal porosity and permeability were employed to describe the heterogeneous distribution of the complex fracture network. The stress sensitivity of fractures was also considered in the model. Pedrosa substitution and perturbation method were applied to eliminate the nonlinearity of the model. Analytical solutions in the Laplace domain were obtained using Laplace transformation. The model was then validated and applied. Finally, sensitivity analyses of pressure and rate were discussed. The presented model provides a new approach to estimate the effect of fracturing. It can also be utilized to recognize formation properties and forecast the dynamics of pressure and the production of tight gas reservoirs. Keywords Tight gas · Multi-fractured horizontal wells · Complex fracture network · Stress sensitivity List of symbolsGas compressibility (1/MPa) c Pore compressibility (1/MPa) c t Total compressibility (1/MPa) b 3 , b 2 Apparent permeability coefficient in region 3 and region 2 k Permeability (mD) k 3aApparent permeability in region 3 (mD) k 2aApparent permeability in matrix in region 2 (mD) k 2frefFracture permeability in region 2 at the boundary of the hydraulic fracture (mD) k 1refPermeability of region 1 at initial condition (mD) Porosity 2fref Fracture porosity in region 2 at the boundary of the hydraulic fracture Λ Λ= c ti 2m + c ti 2frefStorativity ratio = c ti 2fref Λ, Inter-porosity coefficient = The spacing from the wellbore to the boundary (m) y eHalf fracture spacing (m)

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“…Based on this model, Su et al (2015) characterized the SRV using a circular region in shale gas reservoir and analyzed the pressure performance considering the SRV. In addition to the analytical models, there are some numerical models to simulate the seepage flow of MFHW in unconventional reservoirs (Mediros et al 2007;Mayerhofer et al 2006;Meyer and Bazan 2011). All these models have some drawbacks, such as the complex computational process, relationships of parameters, and difficult application, so the simplifications of the flow models have to be considered.…”

Section: Introductionmentioning

confidence: 99%

A multi-linear flow model for multistage fractured horizontal wells in shale reservoirs

Zhang

2016

J Petrol Explor Prod Technol

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This paper presents an analytical multi-linear flow model for shale gas reservoirs with multistage fractured horizontal wells (MFHW). It has been proved that the hydraulic fractures are branched rather than simple bi-wing shape, and the seepage flow of shale gas reservoirs is more complicated than conventional gas reservoirs due to the gas occurrence characteristics and fracture networks. Based on the published trilinear flow models, a developed five-region model considering effective fractured volume and adsorption effect was established. Laplace transformation method and Stehfest numerical algorithm were used to obtain typical pressure response curves. In addition, the presented model was validated by the actual production data, different flow regimes were divided, and the prediction of presented model was compared with the results of Eclipse simulator. Effects of some factors such as stimulated reservoir volume, storativity ratio, and Langmuir volume on the performance were analyzed. The results showed that the presented model considering stimulated volume and adsorbed gas could predict the productivity of MFHW better. The linear flow of stimulated region was the main contribution to gas production, and the duration of formation linear flow was influenced by different parameters. So the selection of optimal combination is very important in the development of shale gas reservoirs.

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Productivity and Drainage Area of Fractured Horizontal Wells in Tight Gas Reservoirs

Cited by 49 publications

References 27 publications

Evaluation of Thermal Stability by Comparison of Potassium Chloride and Potassium/Sodium Formate Fluids

Evaluation of Thermal Stability by Comparison of Potassium Chloride and Potassium/Sodium Formate Fluids

Analytical model for pressure and rate analysis of multi-fractured horizontal wells in tight gas reservoirs

A multi-linear flow model for multistage fractured horizontal wells in shale reservoirs

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