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Drilling time correction method based on engineering parameters while drilling

A technology of engineering parameters and correction methods, which is applied in the direction of drilling measurement, earthwork drilling and production, drilling equipment, etc., can solve the problems that are difficult to replace and directly applied, the content is not clear enough, and does not correspond, so as to achieve rich geological engineering information and application effect Good effect with wide application prospect

Active Publication Date: 2022-01-28
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the prior art, Chinese patent 201410744436.1 discloses a weight-on-bit correction processing method during drilling, which has the following disadvantages: 1. The calculation method of the ratio of light and heavy hydrocarbons is relatively simple, and the gas detection of hydrocarbons is performed between the corresponding component values ​​​​at a single depth point The relative content of light and heavy components accounts for the percentage of the total hydrocarbons, that is, the ratio of light hydrocarbons and the ratio of heavy hydrocarbons, and then combine the two curves for manual judgment. Generally, if the ratio of heavy hydrocarbons increases and the ratio of light hydrocarbons decreases, oil may be produced, otherwise gas or water
Moreover, the calculated parameters do not correspond to the original parameters, so it is difficult to replace and apply directly, and can only be used as a correlation index
3. It relies heavily on statistical features, and the content of the expression is not clear enough. The general idea is that its invention is mainly based on the statistical scatter diagram analysis method based on the data of a geological exploration block, which belongs to the linear fitting method, and the correlation coefficient is obtained from the observation of its chart It should be relatively low, the coincidence rate and application promotion are more difficult, and it does not have strong generalization characteristics

Method used

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  • Drilling time correction method based on engineering parameters while drilling
  • Drilling time correction method based on engineering parameters while drilling
  • Drilling time correction method based on engineering parameters while drilling

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Embodiment 1

[0033] A drilling time correction method based on engineering parameters while drilling, which uses the variation of drilling time with drilling engineering parameters to calculate the power index based on WOB and rotational speed, and obtains the drilling time correction model based on WOB and rotational speed through the power index. According to the drilling time correction model, the whole drilling time is corrected.

[0034] The specific steps of the method are as follows:

[0035] a. Calculate the power index through the weight on bit and the speed;

[0036] b. Preprocessing power index;

[0037] c. Multiply the power index and the drilling time to be corrected to obtain the drilling time correction model based on the weight on bit and the rotational speed;

[0038] d. Correct the drilling time for the whole section according to the drilling time correction model.

[0039] The power index Calculated by the following formula:

[0040]

[0041] In the above formul...

Embodiment 2

[0050] The present invention is a technical solution for compensating and correcting the drilling time (ROP) based on the engineering parameters in the drilling process including but not limited to the records of the comprehensive mud logging instrument, including the following two aspects: (average) power index ( ), compensation-correction drilling parameters .

[0051] Engineering parameters are usually interrelated, interacting and interacting, as field experience shows, WOB ( ) increases, the drilling time will be accelerated; otherwise, the drilling time will decrease significantly. In the case of ignoring other similar influencing factors or other interference factors that are difficult to quantify, a part of it can be introduced as a correction factor into the mud logging interpretation to increase the participation of engineering parameters and enrich Mud logging interpretation connotation.

[0052] (1) Power index and average power index calculation

[005...

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Abstract

The invention discloses a drilling time correction method based on engineering parameters while drilling, which includes: calculating the power index based on the drilling pressure and the rotating speed by using the situation that the drilling time changes with the drilling engineering parameters, and obtaining the power index based on the drilling pressure and rotating speed through the power index. Drilling time correction model, according to the drilling time correction model for the entire drilling time correction process. Through the present invention, the correlation between the drilling time and the WOB is weakened, and the characteristics related to the change of the rotational speed are added, while the geological engineering information of the drilling time is enriched, the influence of the key factor of the WOB is filtered to a certain extent, which is more accurate It reflects the part of the characteristics that change due to formation during drilling.

Description

technical field [0001] The invention relates to a method for correcting drilling time (ROP) by using engineering parameters recorded by a comprehensive logging instrument during drilling, and belongs to the application field of oil and gas industry exploration and development technology in the electromechanical field. Background technique [0002] Drilling time is one of the most important geological engineering parameters. It can judge engineering anomalies and geological anomalies. It is of great significance for the discovery of oil and gas reservoirs and the prediction and detection of engineering accidents. Instability, unevenness and unbalanced rotational speed lead to abnormal fluctuations and jumps during drilling, which have a great impact on reservoir discovery and engineering judgment. The present invention utilizes existing engineering technology and equipment conditions without installing other In the case of equipment, the original drilling time is corrected by...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B45/00
CPCE21B45/00
Inventor 赵磊尹平徐剑良何嘉唐谢伍翊嘉
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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