LITHOLOGIC RESERVOIRS ›› 2015, Vol. 27 ›› Issue (1): 115-121.doi: 10.3969/j.issn.1673-8926.2015.01.017

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Study on electric structure in a hydrocarbon accumulation area, Qaidam Basin

  PENG YonghuiLI Diquan

    

  1.  School of Earth Science & Info-physics ,Central South University ,Changsha 410083 , China
  • Online:2015-02-03 Published:2015-02-03

Abstract:

The geological conditions in a hydrocarbon accumulation area of Qaidam Basin are complex, and the seismic exploration effect is not obvious. By applying wide field electromagnetic method, this paper conducted field experiment with five survey lines and studied the electric structure of the study area by a continuous periodic 2n sequence pseudo-random signal. The results show that five main electric layers exist and the gas layers perform relatively high electrical resistivity. The inversion resistivity values of the gas layers are two times more than that of non-gas layers. Comparing with the well drilling and seismic data, the wide field electromagnetic method is effective for oil and gas identification. Due to the simple field work and low costs, the value of wide field electromagnetic method is tremendous in popularization and application in Qaidam Basin.

Key words:  shale, fracture pressure, fracturing operation, hydration stress, hydraulic fracturing, rock mechanics



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