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Well breakpoint auto-recognition method

An automatic identification and breakpoint technology, applied in the fields of earthwork drilling, wellbore/well components, measurement, etc., can solve the problem of how to determine the well breakpoint that is not involved, and achieve the effect of easy mastery, fast speed and high precision

Inactive Publication Date: 2018-08-07
NORTHEAST GASOLINEEUM UNIV
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Problems solved by technology

[0003] Through searching the patent website and relevant technical documents, in oilfield production, there is only one invention of the same kind, which is "A Logging Identification Method for Fault Structure" invented by Jiang Youlu of China University of Petroleum (East China) in 2016. It involves a variety of The data identify the internal structure of the fault. The first condition of this method is to determine the position of the well breakpoint before the later operation can be performed. It does not involve how to determine the key link of the well breakpoint.

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  • Well breakpoint auto-recognition method

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Embodiment Construction

[0071] Provide the present invention in detail below:

[0072] The first step is to use coring and special logging data to establish an understanding of the geological characteristics of fault rocks.

[0073] This step is realized through the following paths: collecting and sorting out coring and special logging data of drilled fault wells and surrounding wells in the study area; comparing the position of the breakpoint with the geological particularity of the surrounding strata; summarizing and forming a conclusion on the geological characteristics of the breakpoint.

[0074] The data available for analysis in this step includes coring wells, micro-resistivity scanning imaging logging, wellbore coring water-flooded layer logging, cross-type multi-set subarray acoustic logging, MDT, C / O energy spectrum logging, etc. material.

[0075] Analyze the geological characteristics of faults and adjacent reservoirs from the five aspects of oiliness, lithology, physical properties, str...

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Abstract

A well breakpoint auto-recognition method is intended mainly to solve the problem that manual stratigraphic correlation recognition method of well breakpoints has low efficiency, low precision and high difficulty and comprises the steps: recognizing fault characteristics, establishing a fault and logging curve rock-electric relation, and using a curve form recognition technique to improve interpretation precision, thus forming the method of using a logging curve to automatically recognize well breakpoints. The method has the advantages that one-off match rate of breakpoint position reaches 80%, non-breakpoint match rate reaches 95% and above, the technical limit that the original method cannot effectively recognize breakpoints within 2 m is broken through, and working efficiency is increased by 40 times and above.

Description

technical field [0001] The invention relates to a method for automatic identification of breakpoints of a large number of infill adjustment wells applied in oil field development. Background technique [0002] Every year, newly drilled development and adjustment wells need to carry out manual comparison and determination of oil layers. This method requires a lot of experience, takes a long time to operate, and is difficult for young employees to master. If the adjustment well is drilled into an underground fault, the formation will be missing, and the comparison will be more difficult, which is a recognized technical difficulty in the oilfield. In recent years, with the successful deployment of high-efficiency wells at the edge of the fault, the edge of the fault has become the main target area for the development of adjustment wells. How to effectively improve the ability of fault interpretation and speed up the interpretation speed has become an inevitable demand for tappi...

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Application Information

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IPC IPC(8): E21B49/00E21B47/00
CPCE21B47/00E21B49/00
Inventor 丛琳姜振海白军辉付青春贾明涛李文龙
Owner NORTHEAST GASOLINEEUM UNIV
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