Pressure transient analysis for asymmetrically fractured wells in dual-permeability organic compound reservoir of hydrogen and carbon

Wang, Lei; Dai, Cheng; Li, Xiang; Chen, Xiaoxia; Xia, Zunyi

doi:10.1016/j.ijhydene.2018.08.082

Cited by 16 publications

(10 citation statements)

References 12 publications

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“…Equation 17is the pseudo-steady productivity equation of vertical wells considering stress sensitivity and reservoir pressure drop but without fracture closure in fractured reservoirs. Using this equation, we can easily calculate the productivity index (J) by introducing bottom-hole pressure difference (p avg − p wf ) into equation (17).…”

Section: Productivity Equation Considering Reservoir Pressure Drop Bumentioning

confidence: 99%

“…e exponential expression is widely applied to describe stress sensitivity [13][14][15][16][17]. Considering actual reservoir situation, some scholars extended these inflow relationships to reservoirs with stress sensitivity by using the previous exponential relationship.…”

Section: Introductionmentioning

confidence: 99%

“…, and r f � r w , equation (26) can be reduced to the case without fracture closure (equation (17)). Furthermore, in the early-time production, due to minor reservoir pressure changes, equation (26) can also be simplified to…”

mentioning

confidence: 99%

“…When reservoir pressure drops over a period of time, it is more accurate to use equation (26) to calculate the productivity than to use equation (28). erefore, equation (26) can be regarded as a general equation, and Mathematical Problems in Engineering equations (17) and (28) are two degradation forms of this equation.…”

mentioning

confidence: 99%

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Productivity Evaluation of Vertical Wells Incorporating Fracture Closure and Reservoir Pressure Drop in Fractured Reservoirs

Zhao

Fan

Wang

et al. 2020

Mathematical Problems in Engineering

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In most oilfields, many wells produce in pseudo-steady-state period for a long time. Because of large reservoir pressure drop in this period, fractured reservoirs always show strong stress sensitivity and fracture closure is likely to occur near wellbores. The primary goal of this study is to evaluate productivity of vertical wells incorporating fracture closure and reservoir pressure drop. Firstly, a new composite model was developed to deal with stress sensitivity and fracture closure existed in fractured reservoirs. Secondly, considering reservoir saturation condition, new pseudo-steady productivity equations for vertical wells were derived by using the proposed composite system. Thirdly, related inflow performance characteristics and influence of some factors on them were also discussed in detail. Results show that fracture closure has a great effect on vertical well inflow performance and fracture closure radius is negatively correlated with well productivity. In this composite model, the effects of stress sensitivity of the inner and outer zone on well productivity are rather different. The inner zone’s stress sensitivity affects well productivity significantly, but the outer zone’s stress sensitivity just has a weak effect on the productivity. Strong stress sensitivity in the inner zone leads to low well productivity, and both inflow performance and productivity index curves bend closer to the bottom-hole pressure axis with stress sensitivity intensifying. Meanwhile, both maximum productivity and optimal bottom-hole pressure can be achieved from inflow performance curves. In addition, reservoir pressure is positively correlated with vertical well productivity. These new productivity equations and inflow performance curves can directly provide quantitative reference for optimizing production system in fractured reservoirs.

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Section: Productivity Equation Considering Reservoir Pressure Drop Bumentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Productivity Evaluation of Vertical Wells Incorporating Fracture Closure and Reservoir Pressure Drop in Fractured Reservoirs

Zhao

Fan

Wang

et al. 2020

Mathematical Problems in Engineering

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“…By solving Eq. 10, the general point source solution for the top and bottom closed boundary, constant production and infinite lateral boundary FVCHRs with triple-porosity dual-permeability behavior can be obtained through Laplace transform and Fourier transform methods (Liu et al, 2019;Wang et al, 2019;Xue et al, 2019):…”

Section: Mathematical Modelingmentioning

confidence: 99%

Transient Pressure Analysis of Inclined Well in Continuous Triple-Porosity Reservoirs With Dual-Permeability Behavior

Tan

et al. 2020

Front. Energy Res.

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Inclined wells has recently been adopted to develop fractured-vuggy carbonate hydrocarbon reservoirs (FVCHRs) composed by matrix, fracture and vug system. Therefore, it is significant for us to describe pressure transient of inclined well for FVCHRs. In this paper, it is assumed that vug and fracture system connect with wellbore, and inter-porosity flow from vug to fracture system appears. Therefore, the pressure transient responses model of inclined well with triple-porosity dual-permeability behavior was built. The model is solved by employing Laplace integral transform and finite cosine Fourier transform. Real-domain solution of the model is obtained by Stehfest inversion algorithm. On the basis model of the published paper, the solution of the simplified model of this paper was validated with horizontal and vertical well of FVCHRs with triple-porosity dual-permeability behavior, and results reach a good agreement. Type curve, according to pressure derivative curve characteristic, can be divided into eight flow regimes, which includes wellbore storage, skin reflect, early vertical radial flow, top and bottom boundary reflection, linear flow, inter-porosity flow from vug to fracture, inter-porosity from matrix to vug and fracture and pseudo-radial flow regimes. The influence of some vital parameters (inclination angle, inter-porosity flow coefficient, well length and permeability ratio etc.) on dimensionless pressure and its derivative curves are discussed in detail. The presented model can be used to understand pressure transient response characteristic of inclined wells in FVCHRs with dual-permeability behavior.

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Dual-Porosity Dual-Permeability Rate Transient Analysis for Horizontal Wells with Nonuniform and Asymmetric Hydraulic Fractures

Liu¹,

Phan²,

Abousleiman³

2021

Rock Mech Rock Eng

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Pressure transient analysis for asymmetrically fractured wells in dual-permeability organic compound reservoir of hydrogen and carbon

Cited by 16 publications

References 12 publications

Productivity Evaluation of Vertical Wells Incorporating Fracture Closure and Reservoir Pressure Drop in Fractured Reservoirs

Productivity Evaluation of Vertical Wells Incorporating Fracture Closure and Reservoir Pressure Drop in Fractured Reservoirs

Transient Pressure Analysis of Inclined Well in Continuous Triple-Porosity Reservoirs With Dual-Permeability Behavior

Dual-Porosity Dual-Permeability Rate Transient Analysis for Horizontal Wells with Nonuniform and Asymmetric Hydraulic Fractures

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