Drilled well target hitting status assessing method and device

Abstract

The invention discloses a drilled well target hitting status assessing method and device and belongs to the field of oil drilling. The method comprises obtaining the position of the mouth of a drilled well to be assessed; dividing the well track of the drilled well to be assessed into multiple measuring sections from the well bottom to the well mouth, and obtaining the depth of every measuring section as well as the azimuth angle and the inclination of the final point of every measuring section relative to the start point of the measuring section in a geological coordinate system; viewing the azimuth angle of the final point of every measuring section relative to the start point of the measuring section in the geological coordinate system as the azimuth angle of the measuring section in a network coordinate system, calculating the position of the bottom of the drilled well to be assessed; calculating correcting values through formulas; correcting the position of the well bottom though the correcting values; comparing the corrected position of the well bottom with the preset position of the well bottom of the drilled well to be assessed. The device comprises a first obtaining module, a second obtaining module, a first calculating module, a second calculating module, a correcting module and an assessing module. The drilled well target hitting status assessing method and device can overcome deviation due to the fact that the azimuth angle of the geological coordinate system serves as the azimuth angle of the network coordinate system for calculation.

Description

technical field [0001] The invention relates to the field of oil drilling, in particular to a method and device for evaluating the drilling target situation. Background technique [0002] Drilling on target means that the error between the horizontal position of the actual drilling target layer and the horizontal position of the designed target layer is within the allowable range. The evaluation results of the drilling target situation are an important basis for the design of well completion, oil testing plan or sidetracking plan. [0003] Taking carbonate oil and gas wells in fractured-vuggy reservoirs as an example (characterized by the requirement that the drilling target radius is not greater than 30m), the existing methods for evaluating drilling target are introduced. First, measure the geographical coordinates of the wellhead, and use the magnetic inclinometer to measure the inclination of each measuring point in the well. After measuring the well inclination, three...

AI Technical Summary

Problems solved by technology

During the evaluation process, the Landmark system calculates the azimuth of the geographic coordinate system as the azimuth of the grid coordinate system, and there is a deviation between the calculated bottom hole position and the actual bottom hole position, which affects the drilling target during the production process Accurate understanding of

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