SYSTEMS AND METHODS FOR DETERMINING POSITION OF MARKER DEPTH COORDINATES FOR CONSTRUCTION OF GEOLOGICAL MODEL OF DEPOSIT

摘要

The invention relates to the method, device, and a machine-readable data carrier used for building a geological model of oil or other mineral deposit. In particular, the invention refers to the method, device, and machine-readable data carrier used for determining the position of marker depth coordinates in wells W from a reference group of wells at the building of a geological model. A technical result is the improved accuracy of the evaluation of parameters used in the building of a geological model describing the location of oil or other deposits. The invention makes it possible, for markers chosen as an initial solution, to calculate the marker depth in each well to maximize the total correlation. For each marker in the set, a functional is defined as the sum of correlation coefficients of a set of well-logging methods for pairs of wells located within a specified distance from one another.

主权项

1. A computer-implemented method for determining a position of coordinates of a marker depth in well W for building of a geological model of a deposit, the computer-implemented method comprising:
1) determining wells W and wells located within a specified neighborhood of the well W, the radius of the neighborhood being R; 2) determining the values of the mark of marker depth {zi}, i=0, . . . , n in each well W and in wells located within a specified neighborhood of the well; 3) evaluating the functional C in points where the value of marker depth {zi} is known; 4) composing gradient vectors in points where the value of marker depth {zi} is known; 5) smoothing the gradient vector by replacing each component of the gradient vector in the well W by the mean value of components of gradient vector in wells in the neighborhood with radius R; 6) searching for a value of the functional C greater than the previously found value of the functional C within a segment of specified length starting from the marker depth mark {zi} in the direction of the gradient vector with the current value of marker depth mark {zi} assumed determined if no such value is found; 7) improving the obtained value of marker depth mark {zi} by searching for a larger value of marker depth {zi} within the specified step; 8) smoothing the gradient vector for the marker depth mark {zi}, at which the functional C is maximal, by replacing each component of the gradient vector in well W by the mean value of components of the gradient vector in wells in the neighborhood with radius R reduced by a specified value; 9) sorting the marker depth marks {zi} by depth; and 10) reiterating the steps 4)-10) of the method until a larger value of functional C is found.