Research on log evaluation of low-permeability reservoir in Pinghu Oil and Gas Field

The development of P11 reservoir is not only an important objective for reserves stimulation, but also one of the current difficulties faced with in the development of Pinghu oil and gas field. Due to its deep burial depth, poor reservoir physical properties, low natural deliverability, complex fluid property, high reservoir temperature and pressure coefficient which brought great difficult to log interpretation and evaluation, the implementation of this development plan has been challenged. Based on the core analysis data, the causes of low permeability reservoirs for P11 has been analyzed in terms of diagenesis and sedimentation, the logging response characteristics has been summarized, and the relationship of reservoir pore structure, permeability, saturation and other parameters have been studied which helps us to obtain a methodology of log interpretation and evaluation, and provide a reliable data and log evaluation for the development of P11 reservoir.