Cable Conveying and Releasing Logging Meter in Complicated Horizontal Wells in Western Sichuan

Due to conventional pump-out logging methods in horizontal-well it was not possible to run drill pipe or logs to the expected position in Western Sichuan, resulting in the loss of oil and gas data measurement. To solve the problem, conventional logging technology was improved by specially designing a guide shoe, cable bypass pup joint, fusing cable head and catch tools, and a technology of pumping down cables for conveying and releasing logging meter was developed, i.e. the drill pipe was lowered to the bottom hole, conveying the logging tools to the sticking point, and then pushing it to the predetermined position by pumping drilling fluids, where the cables were separated with logging tools, and the logging operation was conducted after the cables were recovered, Finally, the drill pipes were pulled out of the hole, so that the logging data could be read after logging tools were taken out of the hole. In western Sichuan, the pumping cable technology for conveying and releasing logging meter has been applied 13 times in complicated-trajectory horizontal wells, with one-time logging success rate of 100%, resulting in successful logging curves for natural gamma ray, dual lateral logging, compensation interval transit time, compensated neutron logs being obtained, with all the curves meeting the SY/T 5132-2003 Industrial Standard. Field application showed that pumping cable technology for conveying and releasing logging meter was applicable to the horizontal wells with complicated well trajectory.