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Temperature drift compensation method and temperature drift compensation system of downhole electronic pressure gauge

A technology of temperature drift and compensation method, which is applied in earthwork drilling, wellbore/well components, measurement, etc., and can solve problems such as cumbersome and complicated processes

Active Publication Date: 2016-04-06
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among the above methods, many need to consider the quality of the linear relationship between the original value of the pressure gauge and the actual value of the pre-measurement parameter to select the temperature drift compensation method, the process is very complicated and cumbersome

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  • Temperature drift compensation method and temperature drift compensation system of downhole electronic pressure gauge
  • Temperature drift compensation method and temperature drift compensation system of downhole electronic pressure gauge
  • Temperature drift compensation method and temperature drift compensation system of downhole electronic pressure gauge

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Embodiment Construction

[0020] In order to illustrate the present invention more clearly, specific implementation manners are given below in conjunction with the accompanying drawings.

[0021] figure 1 It is a flowchart of an embodiment of the temperature drift compensation method of the present invention. Such as figure 1 As shown, the temperature drift compensation method of the present invention starts with reading the data table CH1 (step S10). The data table CH1 is the temperature and pressure data table, as shown in Table 1 below. It should be pointed out that six temperature points T1-T6 and seven pressure points 0MPa-60MPa are illustrated in Table 1 as examples, but the temperature drift compensation method of the present invention is not limited to this situation, but can be aimed at more Do the same with more or fewer temperature points, more or fewer pressure points. In Table 1, P11 to P76 are pressure values ​​measured at specific temperatures and pressures (specific examples of whic...

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Abstract

The invention provides a method and system for temperature drift compensation of an electronic pressure gauge in a mine. The method is mainly applied to correcting the temperature drift compensation when the electronic pressure gauge in the mine measures pressure. In the actual application, the method is written into a program, so that difficulty of calibration and the temperature drift correction is greatly reduced, working efficiency is improved, and meanwhile measurement precision of the pressure gauge is improved.

Description

technical field [0001] The invention relates to a downhole electronic pressure gauge, in particular to a temperature drift compensation method and a temperature drift compensation system for the downhole electronic pressure gauge. Background technique [0002] Oil well formation pressure data is an important data. Measuring the formation pressure of oil wells is very necessary for the production planning of oil layers and understanding the formation conditions. As oilfield development enters the middle and later stages, the accuracy of pressure testing is also more stringent. [0003] As the temperature changes, the sensors and circuits in the electronic pressure gauge have different degrees of temperature drift. Temperature drift compensation must be carried out in order to obtain more accurate bottom hole pressure data. At present, the main temperature drift correction methods include a three-point horizontal and vertical interpolation method, horizontal and vertical le...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/06
Inventor 张洪君杨志祥张福兴刘祥余训兵赵超岳鹏飞马丽勤哈文雷覃青松赵福刚李强李丽陈玉成孙光雄朱强周轶青李蓉景士锟陈捷邵占辉刘丹
Owner PETROCHINA CO LTD