Method and device for determining stratum overpressure category in while-drilling process

A formation and while drilling technology, applied in the direction of earthwork drilling and production, wellbore/well components, etc., can solve problems such as poor timeliness, inability to determine the type of formation overpressure, lagging application scenarios, etc., to improve accuracy and resources Development efficiency, effect of promoting oil and gas exploration process

Pending Publication Date: 2022-06-07
中海石油(中国)有限公司深圳分公司
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Problems solved by technology

[0004] The method for identifying the cause of formation overpressure in the related technology lags behind in application scenarios, and the relevant data required in the method for determining the cause of overpressure can only be obtained after drilling is completed, which has poor timeliness and cannot be used to identify the types of formation overpressure in the process of drilling. Sure

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  • Method and device for determining stratum overpressure category in while-drilling process
  • Method and device for determining stratum overpressure category in while-drilling process
  • Method and device for determining stratum overpressure category in while-drilling process

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Embodiment Construction

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, the drawings only show some but not all structures related to the present invention.

[0025] figure 1 It is a flowchart of a method for determining the type of formation overpressure during drilling while drilling provided by an embodiment of the present invention. Implemented in the form of hardware and / or hardware, the device may be configured in an electronic device for determining the category of formation overpressure during drilling. The method is applied in the scenario of effectively identifying the overpressure of hydrocarbon generation during drilling. like figure 1 As shown, the technical solutions pr...

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Abstract

The embodiment of the invention discloses a method and device for determining the stratum overpressure category in the while-drilling process. The method comprises the steps that according to rock pyrolysis logging data of all mudstone samples in a first depth stratum of a drilled section in the while-drilling process, the change trend of the organic carbon content of all the mudstone samples in the first depth stratum is determined, and the change trend of the kerogen highest cracking peak parameter of all the mudstone samples in the first depth stratum is determined; wherein the number of the mudstone sample in the first depth stratum is at least one; the first depth stratum is an overpressure stratum; and according to the change trend of the organic carbon content and the change trend of the highest cracking peak parameter of the kerogen, the stratum overpressure type in the first depth stratum of the drilled section is determined. By executing the technical scheme provided by the embodiment of the invention, the stratum overpressure type can be determined in real time in the drilling process, the precision of monitoring the stratum pressure while drilling can be improved, the oil-gas exploration process is promoted, and the resource development benefit is improved.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of pressure measurement while drilling, and in particular, to a method and device for determining the type of formation overpressure during drilling. Background technique [0002] With the gradual advance of oil and gas exploration into deep and deep seas, drilling failures or out-of-control blowouts due to sudden overpressure in the drilling stratum emerge in an endless stream. adverse consequences such as environmental pollution. [0003] In actual drilling operations, timely and effective monitoring of formation pressure while drilling is an important basis for ensuring drilling safety. If the causes of overpressure can be identified in a timely and objective manner, the accuracy of formation pressure monitoring while drilling will be significantly improved, and it will also help promote the process of oil and gas exploration and improve the benefits of resource development. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00
CPCE21B49/00
Inventor 关利军蒋钱涛熊亭何泽俊张伟曹孟贤
Owner 中海石油(中国)有限公司深圳分公司
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