Drilling process operation performance evaluation method

Abstract

The invention provides a drilling process operation performance evaluation method. The drilling process operation performance evaluation method comprises the following steps: introducing process capability index definition and dividing drilling process operation performance grades; performing filtering and normalization processing on the drilling process data, and judging whether the current working condition is normal drilling or not; performing feature extraction on the variable space by using a principal component analysis method, and extracting an operation parameter principal component space as an input parameter of the operation performance evaluation model; an evaluation model is established for the operation state under the normal drilling working condition through a particle swarm optimization support vector machine method, the input of the model is an operation principal component variable, the output is the energy level of the current operation performance, and the aim of evaluating the operation performance in the drilling process is achieved. According to the operation performance evaluation method provided by the invention, the limitation caused by regional limitation of a traditional method is overcome, the accuracy of the operation performance evaluation result in the drilling process is improved, and guidance is provided for research on the aspects of state monitoring, performance optimization and intelligent control in the drilling process.

Description

technical field [0001] The invention relates to the technical field of geological drilling engineering, in particular to a method for evaluating the operation performance of the drilling process. Background technique [0002] With the continuous exploitation of energy, the shallow and easy-to-exploit resources in my country are gradually decreasing. Deep geological drilling is the only way to explore the deep resources of the earth and break the imbalance between supply and demand of resources. [0003] The special geological conditions make my country have the basic conditions and unique location advantages to solve the deep processes and the corresponding world-class major scientific frontier problems in the shallow surface. However, as the drilling depth increases, the bottom hole temperature can easily exceed 150°C. When the drilling depth reaches 6,000 meters or even 8,000 meters, the bottom hole temperature is likely to exceed 200°C. As a result, the state information...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for evaluating the operation performance of the drilling process, which is used to solve the technical problem of lack of real-time monitoring and evaluation of the state of the drilling process in the prior art, which is prone to low drilling efficiency

Images