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A method of using pressure to locate the depth of drilling microchip tracers

A tracer and microchip technology, applied in earthwork drilling, wellbore/well components, measurement, etc., can solve the problems of not collecting well depth information, and the depth of the tracer cannot be accurately determined and evaluated

Active Publication Date: 2016-06-29
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0010] The present invention solves the technical problem that the depth of the tracer cannot be accurately determined and evaluated in the prior art, that is, in the prior art, when the tracer moves in the well, only the time information is collected, and the well depth information is not collected.

Method used

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  • A method of using pressure to locate the depth of drilling microchip tracers
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  • A method of using pressure to locate the depth of drilling microchip tracers

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Embodiment Construction

[0100] Verification test: see Figure 5

[0101] In order to verify the hair surface effect, the verification was carried out in Well Z6, the well depth is H=2930.72m, the drilling fluid displacement is Q=30l / s, and the drilling fluid density is ρ d =1.30g / cm 3 , the effective viscosity of the drilling fluid is μ=0.022Pa·s.

[0102] ① Determine the hydrostatic pressure on the tracer in the annulus.

[0103] If the drilling fluid does not circulate, the pressure acting on the tracer is the hydrostatic pressure of the drilling fluid, which is:

[0104] P h=10 -3 gρh i =0.012735h i MPa

[0105] ② Allocation of well sections. According to the difference of the inner and outer diameters of the annulus, the whole well is divided into several well sections. The inner and outer diameters and lengths of the annulus of each well section are respectively d from top to bottom 1 =127.00mm, D 1 =220.52mm, h 1 =1822.18m; d 2 =127.00m, D 2 =215.90mm, h 2 =920.56m; d 3 =177.80...

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Abstract

The invention belongs to the field of petroleum exploration and development. Especially for methods of depth determination for drilling microchip tracers. The tracer moves with the flow of the drilling fluid. The present invention uses the pressure method to locate the depth of the drilling tracer. The method first calculates the hydrostatic pressure at different depth points of the annulus, and maps the entire well according to the difference in the annulus. Divide it into several well sections, and calculate the frictional resistance of the tracer in each well section, so as to calculate the pressure on the tracer in the annular space. depth. The invention can timely detect abnormal drilling accidents such as well kick, lost circulation, drilling tool friction well wall, and drilling tool puncture, improve drilling efficiency, and timely discover and evaluate oil and gas reservoirs.

Description

technical field [0001] The invention belongs to the field of petroleum exploration and development. It involves the research direction of detecting wellbore temperature and pressure in order to improve drilling efficiency and ensure drilling safety in drilling, especially the method of depth determination for drilling microchip tracers. Background technique [0002] ① Drilling parameter measurement plays an important role in ensuring drilling safety [0003] Oil drilling is a high-risk industry. During the drilling process, if a drilling accident occurs, it will cause property damage at least, and casualties at worst. With the increase of well depth, especially the development of various branch wells and horizontal wells, the incidence of drilling accidents and complex situations is getting higher and higher. Drilling engineering accidents such as kick and lost circulation occur to varying degrees in major oil fields in China every year, and these accidents are closely rel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/04E21B47/06E21B47/07
Inventor 杨明清陆黄生张卫李三国吴海燕王志战
Owner CHINA PETROLEUM & CHEM CORP