Research on MWD Gamma-ray Tool & the Calibration Method for It
|School||China University of Petroleum|
|Keywords||MWD LWD natural gamma ray measuring instrument Formation gamma value Calibration method Single bus|
During drilling , drilling engineering and geological staff hope to keep abreast of the formation parameters to adjust well trajectory , drill accurate drilling to reach the goal layer , increase drilling efficiency , and ultimately improve the oil recovery . Formation natural gamma values ??reflect how much of the formation of clay content , LWD gamma ray measurements to measure the to drill stratigraphic natural gamma values ??, combined with the depth data to map out the formation - gamma curve . In this paper, with the drilling of natural gamma measurement instrument of significance , radioactive measurement principle and instrument principles depth analysis, based on the detailed discussion of the content of the study of the natural gamma ray measuring instrument while drilling , and focused on the system hardware and software implementations , while drilling equipment takes a long time to work in the environment of high temperature , high pressure , strong motion , put forward higher requirements of actual instrument reliability , analyze the sources and characteristics of the interference with an appropriate anti-jamming measures LWD natural gamma ray measuring instrument to achieve the requirements of field application , the last part of the instrument practical application test and field validation of the instrument characteristics and indicators .