Log Evaluation for Low Porosity and Low Permeability Reservoir in Xiao Caohu Sag,Tuha Basin

Aimed at the reservoir of Hongtai Oil-gas Field in Xiao Caohu sag,Tuha Basin,where is characterized by low porosity,low permeability and low resistivity,this paper introduces the general situation of applying vertical stratigraphic correlation for individual well and inter-well lateral correlation for multi-well,in which the experiences on component analysis of gas logging,time-lapse logging to identify fluid,as well as the application of acoustic dipole log are elaborated.The application of the techniques above mentioned has increased extra 133.4×10~8 m~3 OOIP of natural gas.