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Academic Journal of Architecture and Geotechnical Engineering, 2023, 5(8); doi: 10.25236/AJAGE.2023.050805.

Research on the distribution law of drilling resistance of formation rock based on modified coefficient method

Author(s)

Xindong Wang1, Zhaohui Song1, Guiyi Zhang1, Xin Zhang1, Zhengxin Jiang1, Tao Su1, Haitao Ren2, Bohui Wang1

Corresponding Author:
Haitao Ren
Affiliation(s)

1Xinjiang Oilfield Company Engineering Technology Research Institute, Karamay, Xinjiang, 834000, China

2Mechanical and Electrical Engineering, Southwest Petroleum University, Chengdu, Sichuan, 610500, China

Abstract

The drilling strength parameters of formation rocks are important reference basis for drilling engineering design, bit selection, and drilling parameter optimization. Establishing a correlation calculation function between logging data and parameters such as rock compressive strength and drillability level through unit experiments, and obtaining a profile of drilling resistance characteristics that varies with well depth, is a classic technical means in the field of oil and gas well engineering. However, in the case of insufficient core volume, the experimental data obtained is limited, making it difficult to regress and fit the calculation model with high accuracy, which limits the application of this technology to some extent. In this paper, a "correction coefficient method" is proposed to establish a calculation model for parameters such as formation compressive strength and drillability grade based on logging data. First, unit experiment analysis is carried out for the limited core volume of the target block. Secondly, the classical calculation model is modified by using the experimental results. Then, the model is applied to the deep well section of the southern block of the Tarim Basin to analyze the drilling resistance characteristics of formation rock and obtain the change trend conclusions. This method breaks through the limitation of experimental core volume and has good engineering application value and potential.

Keywords

Rock drillability; Oil and gas drilling; Deep strata; Logging interpretation; Tarim Basin

Cite This Paper

Xindong Wang, Zhaohui Song, Guiyi Zhang, Xin Zhang, Zhengxin Jiang, Tao Su, Haitao Ren, Bohui Wang. Research on the distribution law of drilling resistance of formation rock based on modified coefficient method. Academic Journal of Architecture and Geotechnical Engineering (2023) Vol. 5, Issue 8: 33-42. https://doi.org/10.25236/AJAGE.2023.050805.

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