Method and system for measuring formation density
A technology of formation density and measurement method, which is applied in geophysical measurement, instruments, etc., can solve the problem of no formation density measurement, etc., and achieve the effect of convenient measurement
Active Publication Date: 2021-01-29
BC P INC CHINA NAT PETROLEUM CORP +1
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[0005] However, the γ-ray densitometer cannot be well applied to the measurement of formation density, and there is currently no method that can better measure the formation density
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[0044] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. After reading the present invention, those skilled in the art Modifications to various equivalent forms of the present invention fall within the scope defined by the appended claims of the present application.
[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terminology used herein in the description of the application is only for the purpose of describing specific embodiments, and is not intended to limit the application.
[0046] It should be noted that when an element is referred to as being “d...
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The invention discloses a method and system for measuring formation density. The method includes the following steps: first gravity data and attitude data are obtained point by point from a plurality of measurement points in the area to be measured; the first gravity data includes the first The horizontal gravity component and the first Z-direction gravity component; according to the first gravity data and attitude data, the second gravity data of the predetermined elevation is obtained; the second gravity data includes the second horizontal gravity component and the second Z-direction gravity component; obtain the horizontal gravity gradient value according to the second horizontal gravity component of two adjacent measurement points; determine the formation density distribution in the area to be measured according to the inversion of the second gravity data and the horizontal gravity gradient value . The method for measuring the formation density provided by the invention can obtain accurate information on the density distribution of the underground formation.
Description
technical field [0001] The invention relates to the field of stratum density surveying, in particular to a method and system for measuring stratum density. Background technique [0002] Currently, measurements of formation density are a means for workers to understand formation lithology and hydrocarbons. Because the density of different substances in the formation is not the same, for example, the density of oil is lower than that of water, and the density of water is lower than that of rock, so the lithology and oil and gas conditions in the formation can be known by observing the distribution of formation density. [0003] At present, gamma-ray densitometers are usually used to measure the density of substances. Gamma ray densitometer is an instrument that gamma rays generated by radioactive sources pass through the substance to be measured, and measure the density of the substance according to the principle that the ability of gamma rays to penetrate the substance is in...
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IPC IPC(8): G01V11/00
Inventor 余刚何展翔涂良成刘骅锋
Owner BC P INC CHINA NAT PETROLEUM CORP