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Method for updating geosteering model

A geosteering and modeling technology, applied in image data processing, instruments, data processing applications, etc., can solve problems such as increasing the difficulty of geosteering drilling, and achieve the effects of avoiding risks, improving accuracy, and improving matching degree.

Active Publication Date: 2020-06-09
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

This method assumes that the formation is of equal thickness, which is often inconsistent with the actual geological conditions, which increases the difficulty of geosteering drilling

Method used

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  • Method for updating geosteering model
  • Method for updating geosteering model
  • Method for updating geosteering model

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Embodiment Construction

[0033] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so that implementers of the present invention can fully understand how the present invention uses technical means to solve technical problems, and achieve the realization process of technical effects and according to the above-mentioned realization process The present invention is implemented concretely. It should be noted that, as long as there is no conflict, each embodiment and each feature in each embodiment of the present invention can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.

[0034] With the development of oil drilling technology, complex oil and gas reservoirs that could not be exploited commercially in the past can also be exploited by horizontal wells. This drilling technology can greatly increase the effective length of the well trajectory ...

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Abstract

The invention discloses a method for updating a geosteering model. The method comprises: establishing a three-dimensional steering model; updating the three-dimensional guide model, including: after the three-dimensional guide model is established or updated, if new stratum information is further acquired, taking the orientation corresponding to the new stratum information as a new constraint point, establishing a virtual well at the new constraint point, and matching the virtual well information of the virtual well with the new stratum information; increasing the structure and rock attributeinformation of the new constraint point by utilizing the virtual well information; and updating the three-dimensional guide model according to the structure of the new constraint point and the rock attribute information. According to the method, the three-dimensional geosteering model can be adjusted according to the latest stratum information, so that the matching degree of the three-dimensionalgeosteering model and the actual stratum condition is improved, the geosteering accuracy is improved, drilling engineers are helped to adjust a drilling plan, and risks are avoided.

Description

technical field [0001] The invention relates to the field of geological exploration and development, in particular to a method for updating a geological steering model. Background technique [0002] With the development of oil drilling technology, complex oil and gas reservoirs that could not be exploited commercially in the past can also be exploited by horizontal wells. This drilling technology can greatly increase the effective length of the well trajectory in contact with the reservoir, expand the oil drainage area, and improve the recovery rate of the oil and gas reservoir. Especially for the development of shale oil and gas reservoirs, horizontal well drilling technology plays a vital role. However, horizontal well drilling also puts forward higher requirements for well trajectory control, drilling risk prediction and avoidance, and geosteering methods have been widely used. [0003] At present, the domestic mainstream geosteering technology often uses the logging wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T19/00G06Q50/02
CPCG06T19/003G06Q50/02Y02A10/40
Inventor 王卫袁多吴非亓东霞
Owner CHINA PETROLEUM & CHEM CORP
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