The Synthesized Sequence Generator Design of Pulsed-neutron Logging Tool

One kind of down-hole full-spectrum acquisition controlling sequence generator and anode high-voltage converter is synthesized ，which is suitable for pulsed-neutron synthesized logging tool. The sequence generator generates neutron bursting sequence of C/O logging, neutron lifetime logging, SPFL, pulsed-neutron oxygen activation logging through anode high-voltage converter, and controls the signal acquisition of these logging modes. Down-hole dual spaced multi-channel spectrum tool, in which the circuit core is synthesized sequence generator, is designed and realized with MPU+CPLD optimized technology. And the anode high-voltage converter is modularized. Based on all technology mentioned above, the slim pulsed-neutron synthesized logging tool has been successfully manufactured and applied in the oilfield, it shows good repetition and reliability through field test.