Sleeve damage factor determining method and device
A technology for determining a device and a casing, which is applied in the field of a casing damage factor determination method and device, and can solve problems such as the inability to determine the casing damage factor.
Pending Publication Date: 2020-04-07
PETROCHINA CO LTD
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[0005] The present application provides a method and device for determining casing damage factors, which can solve the problem that the casing damage factors cannot be determined in the prior art. The technical solution is as follows:
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[0064] In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manners of the present application will be further described in detail below in conjunction with the accompanying drawings.
[0065] In the process of extracting oil or natural gas, it is usually necessary to drill wells in the formation. And if figure 1 As shown, each well is usually provided with a cement pipe, the cement pipe is covered with a casing, the casing is covered with an inner pipe, and the inner pipe is used to transport oil or natural gas. In addition, before drilling wells in the strata, the distribution of rock layers in the stratum can be detected by the resistivity detection method, and the stratum section diagram of the distribution of rock layers in the stratum can be drawn; The trajectory of the well in the formation is obtained by measuring the inclination, and then the trajectory map of the wellbore is drawn.
[0066] Casing is...
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The invention discloses a sleeve damage factor determining method and device, and belongs to the field of oil and gas exploitation. The method comprises the following steps: determining a first depthrange of a damaged position in a target sleeve in a target well; detecting whether the target well meets a first condition or not; when the target well meets the first condition, acquiring the buckling strength threshold value of the target sleeve and the stress borne by the damaged position of the target sleeve within the first depth range; judging whether the stress borne by the damaged positionof the target sleeve in the first depth range is greater than the buckling strength threshold value of the target sleeve or not; when the stress borne by the damaged position of the target sleeve inthe first depth range is greater than the buckling strength threshold value of the target sleeve, determining that the damage factor of the target sleeve comprises a mudstone hydration factor. The invention provides the sleeve damage factor determining method. The method is used for determining the damage factors of a sleeve.
Description
technical field [0001] The present application relates to the field of oil and gas exploitation, in particular to a method and device for determining casing damage factors. Background technique [0002] Casing refers to the metal tube that supports the oil and gas well wall or oil and gas well hole in the oil and gas well. Casing plays an important role in the extraction of oil and gas. [0003] Casing is easy to be damaged in the process of oil and gas extraction (such as shrinkage, bending, etc.), and determining the factors that cause casing damage as soon as possible can make timely adjustments to the development of oil and gas wells and reduce losses in the process of oil and gas extraction. [0004] Therefore, there is an urgent need for a method of determining casing damage factors. Contents of the invention [0005] The present application provides a method and device for determining casing damage factors, which can solve the problem that the casing damage factor...
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Login to View More IPC IPC(8): E21B47/007E21B47/04
CPCE21B47/04
Inventor 梁新欣唐庆步宏光杨涛林莉莉孙琳
Owner PETROCHINA CO LTD