A Drilling Scheme Optimization Method Based on Virtual Simulation

Abstract

The invention provides a method for optimizing a drilling scheme based on virtual simulation, which belongs to the field of oil and gas well drilling. This method first obtains the ROP data of the whole well section and the drilling risk level data of the whole well section of each scheme, and calculates the comprehensive risk coefficient R of the nth scheme respectively. n , the average drilling time coefficient T of the nth scheme n , the optimization coefficient S of the nth set of plans n =R n +T n , the optimal coefficient S of the N schemes n be sorted, where S n The solution corresponding to the smallest one is the optimal solution. The present invention can be used in the design stage of drilling schemes, and designers can use the present invention to simulate, compare and optimize different design schemes, so that the whole set of design schemes can be optimal in terms of risk control and drilling efficiency.

Description

technical field [0001] The invention belongs to the field of oil and gas well drilling, and in particular relates to a method for optimizing a drilling scheme based on virtual simulation. Background technique [0002] Oil and gas drilling is an underground concealed project, which is said to be "difficult to enter the ground than to go to the sky", especially when drilling complex structure wells, ultra-deep wells, ultra-long-reach wells and special process wells under complex geological conditions. With a large number of heterogeneous, uncertain, non-structural, and non-numerical problems, solving these engineering "black box" problems urgently requires information technology, intelligent technology, and contemporary high-end science and technology to realize the "looking at the underground" expected by the industry. The vision of "well drilling", especially before drilling, how to simulate and preview the construction plan in a low-cost and risk-free way, expose potential ...

AI Technical Summary

Problems solved by technology

[0003] The existing technology is either the simulation of the drilling surface equipment, or the specific simulation scene animation is pre-cured in the software for training, and it cannot be driven by the drilling design data to realize the simulation preview of the downhole state and process

Since the entire well is thousands of meters deep, each depth may have different levels of risk (the lower the risk level, the better) and different ROP (the higher the ROP, the better), the two indicators sometimes cannot reach the maximum at the same time. Therefore, it is difficult and not accurate enough to select a set of schemes that take into account these two indicators as the best scheme for the whole well.

Images