Method for calculating photoelectric absorption cross-section index of stratum based on X-ray litho-density logging
A lithological density and X-ray technology, applied in the field of petroleum exploration, can solve problems such as large errors, and achieve the effect of eliminating influence and improving measurement accuracy.
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[0048] Such as figure 1 As shown, an X-ray lithology density logging device includes an X-ray source 1, a near detector 3 and a far detector 5, and the X-ray source 1, the near detector 3 and the far detector 5 are all placed in the barrel In the casing, the cylindrical casing is placed in the wellbore, and the surrounding of the wellbore is the measured formation 8. The far detector 5 is located above the X-ray source 1 , and the near detector 3 is located between the X-ray source 1 and the far detector 5 . The X-ray source 1 communicates with the formation through the X-ray source collimation hole 2 , the near detector 3 communicates with the formation through the near collimation hole 4 , and the far detector 5 communicates with the formation through the far collimation hole 6 . A shielding body 7 is provided in the cylindrical housing between the X-ray source 1 and the near detector 3 , and between the near detector 3 and the far detector 5 .
[0049] The voltage of the ...
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