Aiming at the problems that the structural reservoir of the 3rd member of Funing Formation in the shallow layer of the western slope of Qintong depression is not developed and the benefit development of the deep low permeability reservoir is difficult

the sedimentary modeling technology and waveform inversion technology are adopted to deepen the study on the accumulation rule and evaluate the favorable area of the structural lithologic oil reservoir of the 3rsd member of the shallow Funing Formation. The spontaneous potential-waveform inversion technology can clearly describe the sand body of about five meters. Based on the established sedimentation and reservoir forming mode of shallow lake beach bar

in the 3rd member of Funing Formation in the western slope of Qintong

Nanhua-Cangji ten-million-ton high quality reserve position has been found by the integrated research

deployment and implementation of exploration and development

and the exploration well success rate is 70 %. The construction and production mode of “decision-making and deployment

geological engineering

organization and operation integration” has been implemented to promote the structure-lithologic reservoir evaluation of the 3rd member of Funing Formation in the western slope of Qintong

and realize the available reserves of 1 003×10

4

t and the built the production capacity of 17.5×10

4

t. The break-even point for crude oil has been reduced from $81/bb1 to $46/bb1

enabling efficient exploration and development of concealed reservoirs.