A method for correcting environmental influence factors of carbon-oxygen ratio logging

A technology of influencing factors and environmental impact, applied in the field of oil and gas exploration, can solve problems such as no calibration method, and achieve the effect of improving interpretation ability, improving accuracy and strong versatility
CN105370273BActive Publication Date: 2018-01-26CHINA NAT OFFSHORE OIL CORP +1
5 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA NAT OFFSHORE OIL CORP
Publication Date
2018-01-26

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a method for correcting carbon-oxygen ratio logging environment influencing factors. A Monte-Carlo method is utilized for simulating a theory relation plate between the influencing factors and a measurement value, based on the theory plate, a marker bed method is used for selecting C / O values of influenced positions and C / O values of uninfluenced positions, and a trend-surface analysis fitting method is used for carrying out linear function fitting on the influenced C / O values and the uninfluenced C / O values to obtain a fitting relation expression between the influenced C / O values and the uninfluenced C / O values. According to the method, the two influencing factors of annular fluid and gravel filling can be corrected, the method is utilized for remarkably improving the reliability of logging response values of the influenced positions, then precision for explaining and evaluating remaining oil saturation through carbon-oxygen ratio logging is improved, and the method is high in universality.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a logging evaluation technology for improving the interpretation accuracy of remaining oil saturation calculated by carbon-oxygen ratio, in particular to a correction method for the influence of annular fluid and gravel packing in the logging process of carbon-oxygen ratio, and belongs to the technical field of oil and gas exploration. Background technique

[0002] Carbon-oxygen ratio logging, also called carbon-oxygen ratio energy spectrum logging, is a new type of pulse neutron logging method. Petroleum mainly contains carbon and hydrogen elements, and water mainly contains oxygen and hydrogen elements. The relative content ratio of carbon and oxygen in the formation can be obtained through carbon-oxygen ratio logging, and missing oil and gas layers can be found in wells that have been casing. , to determine the remaining saturation of the oil reservoir in the oil well that has been produced, etc.

[0003] In the process of ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More