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A Method for Measuring the Repeatability of Time-lapse Seismic Data

A time-lapse seismic and seismic data technology, applied in the field of oilfield exploration, can solve problems such as the difficulty of visually measuring the repeatability of seismic data and the fuzzy distinction between repeatability of seismic data

Active Publication Date: 2021-11-23
BGP OF CHINA NAT GASOLINEEUM CORP +1
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Problems solved by technology

[0007] The above methods can only qualitatively measure the repeatability of seismic data, and the distinction between good and poor repeatability of seismic data is relatively vague, and it is difficult to intuitively measure whether seismic data is repeatable.

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  • A Method for Measuring the Repeatability of Time-lapse Seismic Data
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  • A Method for Measuring the Repeatability of Time-lapse Seismic Data

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Embodiment Construction

[0079] In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manners of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0080] In the field of oilfield exploration technology, technicians often use time-lapse seismic exploration technology to explore oil and gas reservoirs. Observe the target area at different times and obtain seismic data, process the two-phase seismic data, so that the part that can reflect the properties of oil and gas reservoirs that does not change with time is repeatable, and then make a difference between the two phases of seismic data to obtain Ability to analyze how a reservoir changes over time. But in practice, it is difficult to ensure that the acquisition conditions at different times are completely consistent, which may lead to poor repeatability of seismic data, so it is necessary to measure the repeatability of sei...

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Abstract

The application discloses a method for measuring the repeatability of time-lapse seismic data, which belongs to the technical field of oil field exploration. The method includes: firstly making a difference between the start data and the monitoring data to obtain the difference data, and then using the Kaiser window Hilbert operator to respectively obtain the Kaiser window Hilbert channel data corresponding to the start data, the monitoring data and the difference data, Then the envelope data of the seismic data is obtained, the envelope sum is calculated by using the envelope data, and the repeatability factor of the envelope feature is obtained, and the truncation threshold is finally determined, and the repeatability factor of the envelope feature is converted into an envelope by using the truncation threshold In this way, according to the envelope feature repeatability indicator factor with a value of 0 or 1, it is possible to intuitively measure whether the seismic data is repeatable.

Description

technical field [0001] The present application relates to the technical field of oil field exploration, in particular to a method for repeatability measurement of four-dimensional seismic data. Background technique [0002] Time-lapse seismic technology is a kind of seismic exploration technology, that is, to stimulate artificial earthquakes in the same area at different times, and use monitoring instruments to conduct repeated observations in the same observation method to obtain seismic data, and finally use the obtained seismic data to study oil and gas. Tibetan dynamic changes. [0003] Theoretically speaking, seismic data includes data related to the dynamic properties of oil and gas reservoirs and data related to the static properties of oil and gas reservoirs. Dynamic properties refer to properties that may change over time, and the values ​​at different times are usually different. , the static property refers to the property that basically does not change with time...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/30G01V13/00
CPCG01V1/30G01V13/00G01V2210/6122
Inventor 高少武
Owner BGP OF CHINA NAT GASOLINEEUM CORP
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