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Blasingame production decline type curves for analysing a multi-fractured horizontal well in tight gas reservoirs

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Abstract

Production decline analysis has been considered as an important method to obtain the flow parameters, reservoir properties and original gas in place. Although advanced Blasingame production decline analysis methods for vertical wells, fractured wells and horizontal wells are widely used, limited study has conducted on Blasingame production decline type curves for multi-fractured horizontal well (MFHW). Based on the perpendicular bisection (PEBI) grids, a numerical model was developed and the solution was obtained using control volume finite element method and the fully implicit method. Blasingame production decline-type curves of the infinitely conductive MFHW were plotted through computer programming. A field case was presented to analyse and verify the model developed. Five flow regimes, including early formation linear flow, early radial flow, compound linear flow, transient flow and pseudo-radial flow, are recognized. Fracture spacing is the main factor that affects early radial flow, compound linear flow and transient flow, the distance from the well to the circular boundary affects the pseudo-radial flow, and the type curves are also significantly affected by the formation permeability, fracture number and fracture half-length. The validation of field case suggests that the Blasingame production decline type curves proposed in this work can be applied to the production decline analysis for MFHW in tight gas reservoirs.

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Authors and Affiliations

  1. State Key Laboratory of Oil and Gas Reservoirs Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, China

    Ming-qiang Wei  (魏明强), Yong-gang Duan  (段永刚), Quan-tang Fang  (方全堂), Zheng-lan Li  (李政澜) & Xi-ran Guo  (郭希冉)

  2. School of Computer Science, Southwest Petroleum University, Chengdu, 610500, China

    Wei Chen  (陈伟)

Authors
  1. Ming-qiang Wei  (魏明强)
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  2. Yong-gang Duan  (段永刚)
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  3. Wei Chen  (陈伟)
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  4. Quan-tang Fang  (方全堂)
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  5. Zheng-lan Li  (李政澜)
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  6. Xi-ran Guo  (郭希冉)
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Correspondence to Ming-qiang Wei  (魏明强).

Additional information

Foundation item: Project(2013CB228005) supported by the National Basic Research Program of China

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Wei, Mq., Duan, Yg., Chen, W. et al. Blasingame production decline type curves for analysing a multi-fractured horizontal well in tight gas reservoirs. J. Cent. South Univ. 24, 394–401 (2017). https://doi.org/10.1007/s11771-017-3441-9

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  • DOI: https://doi.org/10.1007/s11771-017-3441-9

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