A method for anti-collision optimization design of cluster well trajectory in large well group

Abstract

A method for anti-collision optimization design of a large well group cluster well trajectory, steps: 1. Define the coordinate range of the large well group cluster well site; 2. Define the design wellhead parameters of the large well group; 3. Drill the well depth, Well inclination angle, well inclination azimuth, vertical depth, east-west coordinates, north-south coordinates and dogleg trajectory data parameters are loaded into the defined coordinate range of large well group cluster well site; 4. Custom optimization design trajectory engineering constraints, Give the target accuracy range and anti-collision safety distance of the designed wellbore trajectory; 5. Determine the vector target orientation of the target body; The optimal design wellbore trajectory data required by the target accuracy; 8. During the trajectory optimization process, dynamically solve the separation coefficient of the anti-collision distance with adjacent wells, and finally find out the Collision safety requires an optimal trajectory; the optimally designed trajectory of the present invention is more gentle.

Description

technical field [0001] The invention relates to the technical field of oil and gas drilling design, in particular to a method for anti-collision optimization design of cluster well trajectory in large wells. Background technique [0002] With the continuous advancement of oilfield exploration and development, the number of cluster wells and infill wells at home and abroad is increasing, the number of infill wells and adjustment wells in old oilfields is increasing, and the scale of new cluster well groups is increasing. The space distance between them is getting smaller and smaller, which puts forward higher requirements for the anti-collision design and drilling operation under the condition of dense well pattern. The pipe is damaged or even the whole well is completely scrapped. In order to avoid the occurrence of wellbore collision accidents, more accurate drilling design and necessary active anti-collision operation methods are required, an appropriate wellbore collisio...

AI Technical Summary

Problems solved by technology

[0003] The main problems in the above-mentioned existing technologies are: (1) the existing model method only considers the optimization design of single well trajectory, and it is difficult to meet the optimization design of large well group trajectory; (2) the existing anti-collision calculation method is based on the actual drilling trajectory The calculation of the collision probability does not consider the problem of anti-collision and circumvention of adjacent wells in the trajectory design stage of the large well group; (3) The existing optimization design solution method of the wellbore trajectory adopts the traditional optimization theory method, which does not meet the anti-collision requirements of cluster wells in the large well group. Solving the optimization model

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