Unit Quaternion Description Method for Detecting High-Temperature Geothermal Well Drilling Conditions

Hongyan Li,Xianyu Zhang,Hai Huang,Bin Liu,Zhipeng Chen,Pengtao Wang ,Baoan Xian

doi:10.1155/2021/9972138

Hongyan Li, Xianyu Zhang + Show 5 more

Open Access

https://doi.org/10.1155/2021/9972138

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Abstract

When the typically utilized method for detecting the drilling conditions of high-temperature geothermal wells is applied, the detection takes a long time, the detection results are inconsistent with the actual conditions, and there are problems such as low detection efficiency and large detection deviation. Therefore, a method for detecting the drilling conditions of high-temperature geothermal wells described by a unit quaternion is proposed. Based on quaternion theory, the quaternion model of the position and attitude is constructed to obtain the drilling attitude. According to the analysis results and the basic principle of kernel principal component analysis, a model is built to realize the detection of high-temperature geothermal well drilling conditions. The experimental results show that in many iterations, the time required is stable and lower than that of other comparison methods, and the detection errors are all lower than 10%. The proposed method has high detection efficiency and low detection errors.

Highlights

Minerals and petroleum are strategic resources that have great importance in terms of the national economy and people’s livelihood
The detection of the drilling conditions of hightemperature geothermal wells is necessary to alleviate the difficulties in drilling directional wells and complex geological conditions
Compared with the unit quaternion description method and the method described in literature 5, 6, and 7, the method of this paper has a lower detection error because it establishes the drilling condition detection method of high-temperature geothermal wells based on core element analysis and confirms the effectiveness

Summary

Introduction

Minerals and petroleum are strategic resources that have great importance in terms of the national economy and people’s livelihood. Drilling is the basic means for developing geothermal resources, but there are high risks involved [2] These risks may come from accidents and anomalies during drilling or cause financial loss due to the absence of oil and gas underground or failure to drill into high-quality thermal reservoirs. This method establishes a longitudinal free vibration model, calculates the natural frequency of the longitudinal vibration in drilling, analyzes the drilling system by the ANSYS finite element analysis software, and obtains the variation characteristics of drilling under different depth conditions to realize the detection of drilling conditions This method, requires a long time to realize detection and leads to low efficiency. The innovation of this method is that it is based on the updated location data and attitude data of the drilling system, analyzes the drill string forces, lays the foundation for the drilling condition detection of high-temperature geothermal wells, establishes the drilling condition detection method for high-temperature geothermal wells on the basis of the stress analysis results of drill strings, measures the deviations between the statistical model and the measured sample, reflects the changes in the monitoring data in residual space, and realizes the dynamic detection of the drilling conditions in high-temperature geothermal wells

Force Analysis

Cbn66666664

Drilling Condition Detection of HighTemperature Geothermal Well

Result and Analysis

Findings

Conclusions