A new computation model of fractured horizontal well coupling with reservoir

Lian, Peiqing; Cheng, Liang-Yee; Cui, Jintao

doi:10.1002/fld.2407

Cited by 18 publications

(8 citation statements)

References 12 publications

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“…Analytical methods to predict the productivity of fractured horizontal well have become invalid tools to optimize the hydraulic fracturing and determine productivity of horizontal well. There are two main methods to accomplish the target, which are analytical flow models [1][2][3][4][5][6] and source function (Green function) models [7][8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

A New Model to Predict Productivity of Multiple-Fractured Horizontal Well in Naturally Fractured Reservoirs

Wang

et al. 2015

Mathematical Problems in Engineering

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In order to predict productivity of multiple-fractured horizontal well in fractured reservoir, flow models of reservoir and hydraulic fractures based on the volumetric source idealization are developed. The models are solved by utilizing Laplace transformation and orthogonal transformation, and flow rate of the well is calculated by coupling the two models. Compared to traditional point source functions, volumetric source function has many advantages in properties of function and programming calculation. The productivity predicting model is verified via an analytical ternary-porosity model. Moreover, a practical example of fractured horizontal well is studied to analyze the productivity and its influent factors. The result shows that flow rate of each fracture is different and inner fracture contributes least to productivity. Meanwhile, there are optimizing ranges for number, length, and conductivity of hydraulic fractures. In low-permeability reservoir, increasing surface area in contact with reservoir by increasing number and length of hydraulic fractures is the most effective method to improve the productivity.

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Section: Introductionmentioning

confidence: 99%

A New Model to Predict Productivity of Multiple-Fractured Horizontal Well in Naturally Fractured Reservoirs

Wang

et al. 2015

Mathematical Problems in Engineering

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“…(8)(9)(10) show the effect of hydraulic fracture's factors on cumulative productions of two cases for 100 days. As Fig.…”

Section: Factors Of Hydraulic Fracturementioning

confidence: 99%

“…While main analytical [1][2][3][4] and semi-analytical models [5][6][7][8] are ignoring the direct flow to horizontal well, which fitted to hydraulic fractured casedhole horizontal wells. But, for hydraulic fractured open-hole horizontal wells, ignoring the flow to horizontal well will cause tremendous error, especially at early time [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…Since Gringarten and Ramey [14] introduced to solve transient flow problems for the first time, various source functions [5][6][7][8][9][10][11][12][13] are developed to simulate pressure behavior and productivity of fractured horizontal wells. But most works have been focusing on point source functions which neglected the flow in source and its volume.…”

Section: Introductionmentioning

confidence: 99%

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Volumetric Source Model to Predict Productivity of Fractured Horizontal Well in Naturally Fractured Reservoirs

Wang¹,

Li²,

Wang³

et al. 2015

TOPEJ

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Abstract:To predict productivity of fractured horizontal wells with different completion methods, the flow models of reservoir and hydraulic fractures are developed by utilizing volumetric source idealization, while the models solved by taking orthogonal transformation. Compared to traditional point source functions, volumetric source function has many advantages in properties of function and programming calculation. A practical example of fractured horizontal well of open-hole and cased-hole is simulated, result shows flow rates of two cases have significant difference at early time, since benefit of production of horizontal well; but it also causes additional pressure, which has disadvantage in the productivity. The difference of productivity of fractured horizontal wells with different completion is decided by the interaction of horizontal well's production and additional pressure drop, which has advantage and disadvantage in the open-hole case respectively. As a result, methods to cause additional pressure drop more seriously such as increasing number, length or conductivity of hydraulic fractures, would reduce the difference; methods to enhance horizontal well's production such as better reservoir flow capacity, would raise the difference.

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“…For the flow in the fracture, considering the length of the fracture is larger than that of the wellbore radius, and the fluid with uniform flux distribution along the fracture accumulates around the borehole as radial fluid flow. Lian [15], based on Green's functions and Newman's product principle, derived a pressure drop formula for considering simultaneous…”

Section: Introductionmentioning

confidence: 99%

A Novel Unsteady Model of Predicting the Productivity of Multi-Fractured Horizontal Wells

Zeng¹,

Long²,

Guo³

2015

IJHT

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Forecasting the productivity of hydraulic fractured horizontal wells precisely is vital to develop low permeability gas and oil fields. The presented paper is based on the instantaneous point source function and potential superposition principle, considering the non-uniform flow distribution and the variable mass linear flow in the fractures of a fractured horizontal well. In the study a dynamic model of couple reservoir seepage and the fluid flow in fractures was built using a spatial-time discretization technique, and a solution method was also introduced. The results revealed that when regarding the inflow to the fracture as uniform and neglecting the pressure drop in the fractures, there may be huge deviation in the productivity calculation of a fractured horizontal well. Neglecting the pressure drop in the fractures may lead to a relatively high calculated value as compared to the actual production. The flow exhibited as an unsteady flow in the early stage, with the fracture segments which were closer to the horizontal wellbore showing a higher flow flux, while others had a lower flow rate. As producing time increase, the hydraulic fracturing horizontal well came to a pseudo-steady state phase, the flow distribution in the fractures tended to be uniform and steady. The daily output of hydraulic fractured horizontal well increases as fracture conductivity increases and there is optimized fracture conductivity consistent with the reservoir permeability.

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A new computation model of fractured horizontal well coupling with reservoir

Cited by 18 publications

References 12 publications

A New Model to Predict Productivity of Multiple-Fractured Horizontal Well in Naturally Fractured Reservoirs

A New Model to Predict Productivity of Multiple-Fractured Horizontal Well in Naturally Fractured Reservoirs

Volumetric Source Model to Predict Productivity of Fractured Horizontal Well in Naturally Fractured Reservoirs

A Novel Unsteady Model of Predicting the Productivity of Multi-Fractured Horizontal Wells

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