Journal of Jilin University(Earth Science Edition) ›› 2016, Vol. 46 ›› Issue (1): 211-219.doi: 10.13278/j.cnki.jjuese.201601205

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Feasibility of Oilfield Wastewater Disposal in the Underpressure System of Basin

Yu Peng1, Ma Teng1, Tang Zhonghua1, Zhou Wei2   

  1. 1. School of Environmental Studies, China University of Geosciences, Wuhan 430074, China;
    2. PetroChina Research Institute of Petroleum Exploitation and Development, Beijing 100083, China
  • Received:2015-04-21 Online:2016-01-26 Published:2016-01-26
  • Supported by:

    Supported by National Major Special Project During the Twelfth Five-Year Plan Period (2011ZX05009-002)

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Abstract:

The distribution of oil and gas in Shiwu depression of Songliao basin is complex, the prospecting degree is high, and the conventional technology for huge scale oilfield wastewater treatment is not ideal. Four thousand meters below of the strata in the study region is pressure negative, we can apply it for storage of the oilfield wastewater in engineering if the storage medium parameters are suitable in terms of the corresponding geological landfill conditions. Based on the hydrological and geological conditions of Shiwu depression in Songliao basin, the groundwater flow and pollutant transport model are constructed to predict storage ability and describe space distribution features of the underpressure area under the condition of infusing wastewater. The formation mechanism and characteristic of distribution of underpressure are analyzed in calculating process, and the environmental effect of wastewater is predicted based on the simulating virtual particle tracer and injection process. This research shows that the underpressure system of Shiwu depression is a natural closed storage reservoir with capacity up to 1.241×108 m3, which is suitable for wastewater injection and storage. The system pressure gradient is 0.005-0.008 MPa/m,and the pollutants are less likely to escape.

Key words: underpressure system, wastewater storage, storage space, numerical simulation, economic benefit, Shiwu depression

CLC Number: 

  • P641.2

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