A calibration method for three-dimensional induction logging tools
An induction logging and three-dimensional technology, which is applied in earth-moving drilling, wellbore/well components, etc., can solve problems such as poor accuracy, and achieve the effects of low cost consumption, high accuracy and technical difficulty.
Active Publication Date: 2015-09-30
CHINA NAT OFFSHORE OIL CORP +1
View PDF9 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The induction logging analog scaler, that is, the scale ring is very convenient to make and use, and is widely used in practice, but because of its poor accuracy, it is generally used as a third-level scale for on-site calibration
Method used
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
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
application example 1
[0047] The three-dimensional induction logging tool calibrated by the above method is tested in a natural lake. The depth of the tested water body is about 18 meters, and the resistivity of the water body is 29.6 ohm.m (measured by the resistivity tester CM-MR-3, the conductivity and Resistivity is reciprocal relationship with each other), because the depth of the water body is relatively large and the range is relatively wide, which is similar to an infinite large uniform water body, horizontal resistivity = vertical resistivity. The three-dimensional induction logging tool was placed horizontally at a water depth of about 9 meters (the instrument is about 9 meters away from the water surface and the lake bottom) for testing. The resistivity (horizontal resistivity) measured by the 21-inch source distance Z-direction coil was 30.03168 ohm-meters, The relative error is 1.458364%, the measured resistivity (vertical resistivity) of the 21-inch source distance to the coil is 30.55...
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 PUM
Login to View More Abstract
The invention provides a ruling method for a three-dimensional induction logger. The method includes the following steps: a. placing the three-dimensional induction logger in a ruling device, wherein the ruling device is provided with solution with given electrical conductivity, then measuring response signals in the ruling device, b. according to ruling device model parameters, conducting numerical modeling and the simulating calculation on the ruling device provided with solution with given electrical conductivity, and then obtaining the equivalent and uniform stratigraphic model conductivity parameters, wherein the response signals of the three-dimensional induction logger in the equivalent and uniform stratigraphic model are the same as the measured response signals of the three-dimensional induction logger in the ruling device provided with solution with given electrical conductivity, c. establishing the congruent relationship between the response signals and the uniform stratigraphic model parameters according to the measured the response signals and the obtained equivalent and uniform stratigraphic model conductivity parameters. The ruling method for the three-dimensional induction logger is capable of conducting the ruling on the response of the three-dimensional induction logger conveniently and ensuring the higher precision at the same time.
Description
technical field [0001] The present invention relates to the technical field of induction logging, and more particularly, relates to a calibration method for a three-dimensional induction logging tool. Background technique [0002] In terms of well logging, with the development of more complex and subtle oil and gas reservoirs, people need to understand the detailed structure of oil and gas reservoirs more and more urgently, thus putting forward higher requirements for well logging. Induction logging is an important method in well logging, and its logging instruments and formation models also change from simple to complex. The frequency domain of the instrument is from single frequency to multi-frequency, the space domain is from single coil induction to multi-coil induction, and the polarization domain is also from single direction polarization to three orthogonal direction polarization. [0003] It is estimated that about 30% of the oil and gas in the world exist in thin s...
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 Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/00
Inventor 李爱勇罗曦孙向阳
Owner CHINA NAT OFFSHORE OIL CORP