Well Seismic Survey, 6

It has been seen that the CVL is never made to the surface of the earth and that, to calibrate them, a well survey must be used. Effectively, just as the first table of depths is given with respect to the rotary table, in the second the times are “floating” and correspond, for example, to the depth https://www.w3.org/1998/Math/MathML" display="inline"> P O previously mentioned. The samples must then be calibrated in time and adjusted to all the times https://www.w3.org/1998/Math/MathML" display="inline"> ΔT , 2 ΔT , 3 ΔT , etc… the same constant value https://www.w3.org/1998/Math/MathML" display="inline"> T 0 corresponds to https://www.w3.org/1998/Math/MathML" display="inline"> P 0 , from which is obtained the new table : A table has 2 rows and 11 columns. The first row is labeled with time intervals starting from T over T subscript R and increasing by delta t increments. The second row is labeled with V and corresponding values V double prime subscript 1 to V double prime subscript 5, with an arrow indicating continuation. https://www.w3.org/1999/xlink" xlink:href=" https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781003761020/e10523ab-dbe3-4c4f-8f3e-863ae3683950/content/pg297_1.tif "/>