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A Method for Testing Young's Modulus of Rock Using Drill Cuttings

A technology of Young's modulus and drilling cuttings, which is applied in the direction of applying stable tension/pressure to test the strength of materials, can solve the problem of reducing the accuracy of triaxial test data, eliminate the influence factors of non-uniformity, and improve the accuracy Effect

Active Publication Date: 2018-08-10
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

This contradiction caused the accuracy of triaxial test data of rock mechanics to decrease

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  • A Method for Testing Young's Modulus of Rock Using Drill Cuttings

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[0025] In order to have a clearer understanding of the technical features, purposes and beneficial effects of the present invention, the technical solution of the present invention is described in detail below, but it should not be construed as limiting the scope of implementation of the present invention.

[0026] The present invention will be described in detail below with a specific embodiment.

[0027] This embodiment provides a method for testing the Young's modulus of rocks using drilling cuttings, such as figure 1 As shown in the flow chart, the method includes the following steps:

[0028] (1) After drying the drill cuttings produced in the drilling process, use an argon ion polisher to polish, and then use a scanning electron microscope to determine the particle size W of the mineral components contained in the drill cuttings;

[0029] (2) Select the probe with the corresponding indenter angle according to the particle size W of the mineral components contained in th...

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Abstract

The invention provides a method for testing the Young modulus of rock through drilling cuttings. The method comprises the following steps that the particle size of mineral constituents contained in the drilling cuttings generated in the drilling process is determined through a scanning electron microscope; a probe with a corresponding pressing head angle is selected according to the particle size of the mineral constituents contained in the drilling cuttings; the maximum press-in depth of the probe is determined, the probe is vertically pressed into the drilling cuttings, and the load-displacement curve of the drilling cuttings is obtained; the Young modulus of the rock is calculated according to the load-displacement curve of the drilling cuttings. According to the method, the drilling cuttings are tested through the micron press-in technology, and the Young modulus parameter of the rock can be obtained accurately; the heterogeneity of rock debris is effectively eliminated, and errors generated in testing are avoided; the Young modulus parameter of the rock can be obtained in real time on the drilling site, and the accurate Young modulus parameter of the rock can be provided for well drilling and well completion; the testing cost is low, and precision is high; wide application prospects are achieved.

Description

technical field [0001] The invention relates to a method for testing the Young's modulus of rocks by using cuttings, which is used for testing the Young's modulus parameters of cuttings produced during the drilling of oil and gas wells, and belongs to the field of rock mechanics parameter detection for oil and natural gas drilling and completion. Background technique [0002] In petroleum engineering, two methods, calculation of well logging curve data and triaxial test of rock mechanics, are generally used to obtain rock Young's modulus parameters. Since there are many factors affecting the well logging curve, such as borehole quality, drilling fluid system, etc., to a certain extent, they only reflect the change trend of rock mechanical parameters, and there are large errors. Therefore, the Young's modulus calculated by using the well logging curve With great uncertainty, it is difficult to satisfy the drilling and completion design and construction simulation analysis. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/08
Inventor 陈朝伟项德贵王倩杨恒林刘玉石赵亦鹏史肖燕王思敏
Owner BC P INC CHINA NAT PETROLEUM CORP
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