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Simultaneous hydraulic fracturing of ultra-low permeability sandstone reservoirs in China: Mechanism and its field test

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Abstract

Based on the impact of the stress perturbation effect created by simultaneous propagation of multiple fractures in the process of simultaneous hydraulic fracturing, a thorough research on the mechanism and adaptation of simultaneous fracturing of double horizontal wells in ultra-low permeability sandstone reservoirs was conducted by taking two adjacent horizontal wells (well Yang**-1 and well Yang**-2 located in Longdong area of China Changqing Oilfield) as field test wells. And simultaneous fracturing optimal design of two adjacent horizontal wells was finished and employed in field test. Micro-seismic monitoring analysis of fracture propagation during the stimulation treatment shows that hydraulic fractures present a pattern of complicated network expansion, and the well test data after fracturing show that the daily production of well Yang**-1 and well Yang**-2 reach 105.8 t/d and 87.6 t/d, which are approximately 9.4 times and 7.8 times the daily production of a fractured vertical well in the same area, respectively. Field test reflects that simultaneous hydraulic fracturing of two adjacent horizontal wells can enlarge the expansion area of hydraulic fractures to obtain a lager drainage area and realize the full stimulation of ultra-low permeability sandstone reservoirs in China Changqing oilfield. Therefore, simultaneous fracturing of two adjacent horizontal wells provides a good opportunity in stimulation techniques for the efficient development of ultra-low permeability reservoirs in China Changqing oilfield, and it has great popularization value and can provide a new avenue for the application of stimulation techniques in ultra-low permeability reservoirs in China.

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Authors and Affiliations

  1. State Key Laboratory of Oil-Gas Reservoir Geology & Exploitation, Southwest Petroleum University, Chengdu, 610500, China

    Lan Ren  (任岚), Ran Lin  (林然), **-zhou Zhao  (赵金洲) & Yong-quan Hu  (胡永全)

  2. Reservoir Evaluation Department, PetroChina Changqing Oilfield Company, **’an, 710000, China

    Ke-wen Yang  (杨克文) & **u-juan Wang  (王秀娟)

Authors
  1. Lan Ren  (任岚)
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  2. Ran Lin  (林然)
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  3. **-zhou Zhao  (赵金洲)
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  4. Ke-wen Yang  (杨克文)
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  5. Yong-quan Hu  (胡永全)
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  6. **u-juan Wang  (王秀娟)
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Correspondence to Lan Ren  (任岚).

Additional information

Foundation item: Project(51404204) supported by the National Natural Science Foundation of China; Project(20135121120002) supported by Specialized Research Fund for the Doctoral Program of Higher Education of China; Project(2014QHZ005) supported by Scientific Research Starting Projecting of SWPU, China

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Ren, L., Lin, R., Zhao, Jz. et al. Simultaneous hydraulic fracturing of ultra-low permeability sandstone reservoirs in China: Mechanism and its field test. J. Cent. South Univ. 22, 1427–1436 (2015). https://doi.org/10.1007/s11771-015-2660-1

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  • DOI: https://doi.org/10.1007/s11771-015-2660-1

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