Control and optimization method and device for horizontal well drilling friction

Abstract

The invention discloses a control optimizing method and device of horizontal well drilling friction and relates to the field of rock-soil or petroleum geology drilling. The control optimizing method of horizontal well drilling friction comprises the following steps that drilling parameters are obtained; according to the drilling parameters of drilling work, a plurality of sets of data samples are obtained through selection; drill column working states corresponding to the data samples are recognized; based on the drilling parameters, the data samples and the drill column working states corresponding to the data samples, the practical friction coefficient of the data samples is obtained; correlation analysis is conducted on the data samples and the practical friction coefficient of the data samples, and parameters, meeting preset requirements, in the drilling parameters are obtained; and the parameters, meeting the preset requirements, in the drilling parameters are adjusted according to preset rules. By the adoption of the control optimizing method and device, the practical friction coefficient can be optimized, and accordingly the real-time drilling efficiency is improved.

Description

technical field [0001] The invention relates to the field of geotechnical or petroleum geological drilling, in particular to a method and device for controlling and optimizing the drilling friction of a horizontal well. Background technique [0002] Long-reach horizontal well technology has become one of the main technologies for developing unconventional oil and gas resources. China has successfully drilled a number of long-reach horizontal wells in shale gas and tight oil and gas, and the average horizontal well section length has gradually increased from 500m to more than 1500m. However, there is still a big gap in long-reach horizontal well technology compared with foreign countries, which is mainly reflected in the long drilling cycle of horizontal wells with long horizontal well sections, high operating costs and limited extension length of horizontal sections. [0003] Judging from the drilling cycle and drilling footage data, a large amount of drilling time is spent...

AI Technical Summary

Problems solved by technology

However, there is still a big gap in long-reach horizontal well technology compared with foreign countries, mainly reflected in the longer drilling cycle of horizontal wells with long horizontal well sections, higher operating costs, and limited extension length of horizontal sections

[0003] Judging from the drilling cycle and drilling footage data, a large amount of drilling time is spent in the drilling operation of the deflection well section and the horizontal well section. high drilling efficiency, long drilling cycle and high cost, which will seriously affect the profitable development of unconventional oil and gas resources (ie shale gas, tight oil and gas, etc.) in the future

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