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Oil and gas drilling shaft state monitoring method and device

A technology for oil and gas drilling and wellbore, which is applied in wellbore/well components, measurement, earthwork drilling, etc., and can solve the problems of untimely monitoring, low monitoring accuracy, difficult drilling and safe construction, etc.

Pending Publication Date: 2022-04-15
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The existing wellbore condition monitoring methods for oil and gas drilling have the problems of low monitoring accuracy and untimely monitoring, and it is difficult to provide guarantee for safe drilling

Method used

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  • Oil and gas drilling shaft state monitoring method and device
  • Oil and gas drilling shaft state monitoring method and device
  • Oil and gas drilling shaft state monitoring method and device

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Embodiment Construction

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0023] As mentioned above, scholars in the prior art have proposed a variety of methods to evaluate the state of the wellbore: (1) By monitoring the image of cuttings returned from the ground vibrating screen, it is judged whether the bottom of the well has collapsed or accumulation of cuttings. The main method of the method is to monitor the stability of the borehole wall. To a certain extent, the amount of cuttings returned can also be used to monitor the deposition of cuttings at the bottom of the well; (2) By arranging pressure sensors along the pipe string, real-t...

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Abstract

The invention discloses an oil and gas drilling shaft state monitoring method and device. The method comprises the steps that wet weight data, dry and wet weight correction coefficients and shaft bottom theoretical rock breaking quantity data of rock debris return quantity in unit time are obtained; according to the wet weight data and the dry and wet weight correction coefficient of the rock debris return amount in the unit time, dry rock debris return volume data are determined; the dry rock debris return volume data is compared with well bottom theoretical rock breaking quantity data, the wellbore state types are determined, and the wellbore state types comprise the normal wellbore state, the unclean wellbore state and the incomplete wellbore wall state; and monitoring the oil and gas drilling shaft state according to the shaft state type. The oil and gas drilling shaft state can be monitored, the monitoring accuracy and efficiency are improved, and a guarantee is provided for safe drilling construction.

Description

technical field [0001] The invention relates to the technical field of oil and gas drilling, in particular to a method and a device for monitoring the state of an oil and gas drilling shaft. Background technique [0002] Horizontal well technology is one of the key technologies to increase single well production, reduce costs and increase efficiency. However, when drilling horizontal wells, there are often problems such as difficult removal of cuttings at the bottom of the well and instability of the well wall, which affect tripping and casing running. In serious cases, it will cause stuck pipe accidents, resulting in the scrapping of buried drilling tools and boreholes; in addition, it will increase ECD, aggravate the risk of lost circulation, and affect the production and operation time. Taking the drilling of shale gas horizontal wells in the Sichuan-Chongqing area of ​​CNPC as an example, nearly 50 sets of rotary steering have been lost since 2014 due to poor borehole cl...

Claims

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Application Information

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IPC IPC(8): E21B47/00E21B49/00G06F30/20
Inventor 杨恒林陈志伟付利范玉光宋明会袁光杰张继军郭凯杰王元沈柏坪郑李
Owner BC P INC CHINA NAT PETROLEUM CORP
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