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While-drilling azimuth gamma imaging data processing method based on single detector

A single detector, imaging data technology, applied in the direction of surveying, earthwork drilling, wellbore/well components, etc., can solve the problems of depth changes and inability to accurately reflect the gamma value of formations in different azimuths, so as to improve accuracy and meet The effect of real-time requirements

Pending Publication Date: 2021-10-22
江苏达坦智慧能源有限公司
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Problems solved by technology

However, single detector azimuth gamma logging while drilling measures azimuth and formation gamma in a helical drilling method, measuring the gamma value of each azimuth formation, and its depth will change
Therefore, the previous data processing methods cannot accurately reflect the gamma values ​​of formations in different azimuths

Method used

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  • While-drilling azimuth gamma imaging data processing method based on single detector
  • While-drilling azimuth gamma imaging data processing method based on single detector
  • While-drilling azimuth gamma imaging data processing method based on single detector

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Embodiment

[0036] An embodiment of the present invention provides a single-detector-based azimuth-while-drilling gamma imaging data processing method, such as Figure 1-2 shown, including the following steps:

[0037] Step 1. Single-detector azimuth gamma logging while drilling to measure azimuth and formation gamma in a helical drilling method to obtain measurement data (depthm i,j ,GR i,j ), where i=1, 2, ..., i represents the serial number of the depth point measured in a certain sector, j = 1, 2, ... j max , j represents the measurement sector of a certain measurement depth point, j max Indicates the number of sectors divided, for the measurement data (depthm i,j ,GR i,j ) for depth matching, the specific steps are as follows,

[0038] Step 1.1, the data set at the current moment (depthm i,j ,GR i,j ), calculate the depth of the two endpoints, depthm start is the start and end point, depthm end is the end point, the calculation formula is as follows,

[0039] depth start =...

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Abstract

The invention relates to a while-drilling azimuth gamma imaging data processing method based on a single detector. The method comprises the following steps of: Step 1, performing measurement of single detector while-drilling azimuth gamma logging measurement azimuth and stratum gamma in a in a spiral line drilling mode to obtain measurement data (depthm, GR), and performing depth matching on the measurement data (depthm, GR); Step 2, performing deburring processing on the measurement data (depthm, GR) and calculating a GR value corresponding to each sector j corresponding to the depth data set depthmd<k>, and alternately performing the two processes; and Step 3, completing the sending of data (depthmd<k>, GR<k,j>) of real-time imaging rendering, wherein depthmd<k> belongs to [depthmd<k,t-1>,depthmd<k,t>]. According to the method, the original data of each sector is processed to obtain the real-time depth matched gamma value data set, and then, real-time imaging is performed, so that the precision of the while-drilling azimuth gamma imaging can be improved, and the real-time requirement is met.

Description

technical field [0001] The invention relates to the technical field of oil field logging, in particular to a single-detector-based azimuth-while-drilling gamma imaging data processing method. Background technique [0002] LWD technology is mainly used for geosteering and formation evaluation, and is an indispensable item in oil and gas development. Azimuth gamma logging while drilling is the preferred item in logging while drilling. When the gamma imaging tool is drilling in the reservoir, it can reflect the contact relationship between the trajectory and the formation according to the real-time azimuth gamma curve and gamma imaging map. Guide geosteering operations. The data transmitted in real time can judge the lithology of the formation, distinguish the lithology characteristics of the upper and lower interfaces, and effectively discover the upper cap rock of the reservoir. In addition to conventional gamma-ray logging applications such as lithology identification and ...

Claims

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Application Information

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IPC IPC(8): E21B47/00E21B49/00
CPCE21B47/00E21B49/00
Inventor 虞绍永陈翔鸿林毅衡
Owner 江苏达坦智慧能源有限公司
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