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Logging while drilling method and apparatus for measuring formation characteristics as a function of angular position within a borehole
Logging while drilling method and apparatus for measuring formation characteristics as a function of angular position within a borehole
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机译:随钻测井的方法和装置,用于测量地层特征随钻孔内角位置的变化
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摘要
A method and apparatus for measuring formation characteristics as a function of angular distance segments about the borehole is disclosed. The measurement apparatus includes a logging while drilling tool which turns in the borehole while drilling. Such characteristics as bulk density, photoelectric effect (PEF), neutron porosity and ultrasonic standoff are all measured as a function of such angular distance segments where one of such segments is defined to include that portion of a "down" or earth's gravity vector which is in a radial cross sectional plane of the tool. The measurement is accomplished with either a generally cylindrical tool which generally touches a down or bottom portion of the borehole while the tool rotates in an inclined borehole or with a tool centered by stabilizer blades in the borehole. IMAGE
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