Production Interference of Hydraulically Fractured Hydrocarbon Wells: New Tools for Optimization of Productivity and Economic Performance of Parent and Child Wells

Weijermars, Ruud; Khanal, Aaditya

doi:10.2118/195544-ms

Cited by 7 publications

(32 citation statements)

References 43 publications

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“…The fracture treatment imperfections came to light as follows. Firstly, the general adequacy of the flow cell-based well performance forecasts due to fracture down-spacing was demonstrated in our two prior papers [6,7].…”

Section: Flow-cell Model Results: Fracture Spacing Effectsmentioning

confidence: 92%

“…Economic optimization is possible by coupling the flow-cell based 2-segment DCA forecast with a cash flow evaluation spreadsheet to balance the number of wells and production gains possible with the added cost of these wells. An example of such an approach was given by Weijermars and Khanal [6]. By using the Excel spreadsheet in combination with a sound and thorough economic analysis, the greatest value from unconventional assets can be realized.…”

Section: Discussionmentioning

confidence: 99%

“…The analytical expressions and key equations and parameters used are based on Complex Analysis Methods (CAM) that can provide solutions for fluid flow paths, velocity distribution, time-of-flight contours, and reservoir depletion patterns. The majority of the detailed derivations and benchmarking of results can be found in two prior publications [6,7].…”

Section: Basic Flow-cell Model Descriptionmentioning

confidence: 99%

“…Process can be repeated for selected type wells to determine the optimized net present value (NPV) for the entire field. After [6].…”

Section: Practical Workflow Stepsmentioning

confidence: 99%

“…Recent work in our research group has paved the way for accurate pre-drilling DCA-based well performance forecasts based on an analytical flow-cell model [6,7]. The flow-cell based 2-segment DCA uses a type well to scale the production performance of newly planned wells, with the distinctive capacity to fully factor in the effects of changes in well length, fracture spacing, fracture height, fracture half-length, and variable well spacing.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Pre-Drilling Production Forecasting of Parent and Child Wells Using a 2-Segment Decline Curve Analysis (DCA) Method Based on an Analytical Flow-Cell Model Scaled by a Single Type Well

Weijermars

Nandlal

2020

Energies

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This paper advances a practical tool for production forecasting, using a 2-segment Decline Curve Analysis (DCA) method, based on an analytical flow-cell model for multi-stage fractured shale wells. The flow-cell model uses a type well and can forecast the production rate and estimated ultimate recovery (EUR) of newly planned wells, accounting for changes in completion design (fracture spacing, height, half-length), total well length, and well spacing. The basic equations for the flow-cell model have been derived in two earlier papers, the first one dedicated to well forecasts with fracture down-spacing, the second one to well performance forecasts when inter-well spacing changes (and for wells drilled at different times, to account for parent-child well interaction). The present paper provides a practical workflow, introduces correction parameters to account for acreage quality and fracture treatment quality. Further adjustments to the flow-cell model based 2-segment DCA method are made after history matching field data and numerical reservoir simulations, which indicate that terminal decline is not exponential (b = 0) but hyperbolic (with 0 < b< 1). The timing for the onset of boundary dominated flow was also better constrained, using inputs from a reservoir simulator. The new 2-segment DCA method is applied to real field data from the Eagle Ford Formation. Among the major insights of our analyses are: (1) fracture down-spacing does not increase the long-term EUR, and (2) fracture down-spacing of real wells does not result in the rate increases predicted by either the flow-cell model based 2-segment DCA (or its matching reservoir simulations) with the assumed perfect fractures in the down-spaced well models. Our conclusion is that real wells with down-spaced fracture clusters, involving up to 5000 perforations, are unlikely to develop successful hydraulic fractures from each cluster. The fracture treatment quality factor (TQF) or failure rate (1-TQF) can be estimated by comparing the actual well performance with the well forecast based on the ideal well model (albeit flow-cell model or reservoir model, both history-matched on the type curve).

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Section: Flow-cell Model Results: Fracture Spacing Effectsmentioning

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Section: Basic Flow-cell Model Descriptionmentioning

confidence: 99%

“…Process can be repeated for selected type wells to determine the optimized net present value (NPV) for the entire field. After [6].…”

Section: Practical Workflow Stepsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Pre-Drilling Production Forecasting of Parent and Child Wells Using a 2-Segment Decline Curve Analysis (DCA) Method Based on an Analytical Flow-Cell Model Scaled by a Single Type Well

Weijermars

Nandlal

2020

Energies

Self Cite

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Applications of chemical and isotopic tracers to optimize well placement and monitor for contamination by reservoir-derived fluids

Wood

2024

Sustainable Natural Gas Drilling

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A New Fracture Parameter Optimization Method for the Horizontal Well Section of Shale Oil

Xing

et al. 2022

Front. Earth Sci.

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Hydraulic fracturing is the most prominently used technique for increasing well productivity in shale oil reservoirs. Therefore, studying the method for optimizing fracture parameters is essential in the development of shale oil. This study established a mathematical model of non-Darcy flow in the fractured horizontal well section of a shale oil reservoir which considered the influence of the threshold pressure gradient. The finite element method was used to solve the problem, and the calculation method of pressure field and productivity was given. This model is used to study the optimal number of clusters, optimal cluster spacing, optimal fracture length, and optimal fracture conductivity in a horizontal well section. Simulation shows that the optimal number of clusters in a horizontal well section is five when the permeability is 0.02 × 10–3 μm2–∼0.10 × 10–3 μm2, and the optimal number is four when the permeability range is 0.15 × 10–3 μm2–∼0.30 × 10–3 μm2. With the increase in the number of clusters, the stimulation effect is more sufficient, the interference effect between fractures is enhanced, and the loss of stratum energy is accelerated. The optimal cluster spacing is 30 m. Several cases of non-uniform cluster spacing have little effect on the stimulation effect. The cluster number and the sum of the cluster spacing are the determinant factors affecting the stimulation effect. The optimal fracture half-length is 140 m. Several cases of the non-uniform fracture length have little effect on the stimulation effect. The cluster number and the sum of the length of the fracture are the determinant factors affecting the stimulation effect. The optimal conductivity is 20 D•cm. At last, it proposed a fracture parameter optimization method considering the stratum energy loss and productivity.

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Production Interference of Hydraulically Fractured Hydrocarbon Wells: New Tools for Optimization of Productivity and Economic Performance of Parent and Child Wells

Cited by 7 publications

References 43 publications

Pre-Drilling Production Forecasting of Parent and Child Wells Using a 2-Segment Decline Curve Analysis (DCA) Method Based on an Analytical Flow-Cell Model Scaled by a Single Type Well

Pre-Drilling Production Forecasting of Parent and Child Wells Using a 2-Segment Decline Curve Analysis (DCA) Method Based on an Analytical Flow-Cell Model Scaled by a Single Type Well

Applications of chemical and isotopic tracers to optimize well placement and monitor for contamination by reservoir-derived fluids

A New Fracture Parameter Optimization Method for the Horizontal Well Section of Shale Oil

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