Digital rock mass establishment and application method for well drilling

Abstract

The invention discloses a digital rock mass establishment and application method for well drilling. The establishment method comprises the steps of establishing a stratigraphic framework model of a set region; obtaining well drilling engineering geological attribute values of drilled tracks; calculating a variogram function of each attribute distributed in each layer; traversing each grid for each attribute in each layer, and endowing the attribute to each vertex of the grid if the attribute exists in the grid; calculating to obtain the attribute value by utilization of the variogram function if each vertex of the grid is fully or partially empty, and endowing the attribute value to the vertex of the empty value; and storing all vertex data obtained in each layer to obtain a digital rock mass. In an well drilling design or actual drilling process of a new well, if the geological parameters need to be employed, each vertex parameter of the grid where a coordinate is can be obtained through the coordinate of each point on each well track, further each engineering parameter of the coordinate is calculated, and finally all engineering parameters of all well tracks can be obtained.

Description

technical field [0001] The method belongs to the technical field of petroleum drilling, and in particular relates to a method for constructing and applying a digital rock body used for drilling. Background technique [0002] In the process of petroleum exploration and development, we must study the underground geological conditions in order to be targeted, and adopt reasonable drilling and mining methods to improve the success rate of exploration and oil and gas recovery. [0003] Over the years, for exploration and development, various oilfields have spent huge sums of money to establish seismic data volumes and reservoir description data volumes of reservoirs, etc., which have played a key role in oilfield exploration and development. However, in the field of drilling engineering, it is also necessary to integrate various geological factors that must be considered in drilling with the block as a unit, so as to optimize the drilling plan, reduce construction risks and impro...

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Problems solved by technology

[0004] At present, some researchers have proposed some calculation methods for drilling engineering geological parameters, but they have not proposed the construction method of digital rock mass (i.e. engineering geological data volume)

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