While-drilling fine time-depth prediction method based on FFC-resistivity

• Main Authors: DENG YONG, SUN WANYUAN, LIU SHIYOU, GUO WEI, FU CHEN
• Format: Patent
• Language: Chinese; English
• Published: 02.11.2018
• Subjects: DETECTING MASSES OR OBJECTS; GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; MEASURING; PHYSICS; TESTING

The invention discloses a while-drilling fine time-depth prediction method based on FFC-resistivity. The while-drilling fine time-depth prediction method comprises the steps of: S1, integrating seismic and well logging data, proposing to consider lithological information classification velocity prediction, and calculating a mudstone velocity value by adopting a formula 1 shown in description; S2,integrating regional well logging data, proposing to consider pore fluid information velocity prediction, and solving a water bearing sandstone velocity by adopting a formula 2 shown in description; S3, calculating a gas reservoir fluid replacing water layer resistivity value, and solving a stratum velocity value by utilizing the mudstone velocity value, a gas-bearing sandstone resistivity value and a water sand resistivity value according to a statistical relation between a resistivity curve and a longitudinal wave velocity curve. The while-drilling fine time-depth prediction method has the beneficial effects of havi