Based on the different responses of compensated neutron log (CNL) in the gas reservoir before and after mud filtrate invasion, the authors designed the test of time-lapsed CNLin cased hole. The result indicates that time-lapsed CNLis effective in gas identification of a reservoir whose permeability is higher than (1~3)×10-3μm2. The test has provided a new method for the interpretation of the questionable, low resistivity or mud contaminated reservoir and for the restudy of old well data.
付金华, 石玉江, 孙小平. 利用套管井补偿中子时间推移测井识别气层及侵入[J]. 物探与化探, 2002, 26(3): 203-206.
FU Jin-hua, SHI Yu-jiang, SUN Xiao-ping . THE APPLICATION OF TIME-LAPSED CNL IN CASED HOLE TO THE IDENTIFICATION OF GAS RESERVOIR AND MUD FILTRATE INVASION. Geophysical and Geochemical Exploration, 2002, 26(3): 203-206.