CORRECTION OF INFLUENCE OF REJECTION DEVICE WITH DENSITY logging while drilling

摘要

1. A method for correcting formation density logging measurements in the drilling process under the influence of the deviation device, comprising the steps of: determine the result of the measurement of the initial formation density of the formation at a predetermined depth using the method of calculating the spine and rib, wherein said measurement result is equal to the initial formation density and apparent formation density based on density data obtained from the gamma-ray detectors; ! calculating a measurement result of deflection device; ! calculating a second density correction term from measurements of apparent formation density and standoff; ! calculating an adjusted density of the reservoir using a second correction term density and the apparent density of the formation. ! 2. The method of claim 1, wherein said step of determining the initial formation density comprises a step of identifying the collected formation data of the at least one primary density quadrant of a formation at a given depth. ! 3. The method of claim 2, further comprising after said step of calculating the result of measurement standoff steps of: calculating original density histogram and formation photoelectric factor (FEF) from the collected formation data, where FEF is a photoelectric factor; ! identifying at least one quadrant satisfactory density of the collected formation data; and! forming a database amendment together with the results of measurements of the primary quadrant density, apparent density measurements and standoff estimations from other formation quadrants. ! 4. method