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Method for measuring repeatability of time-shifting 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: 2020-02-21
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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  • Method for measuring repeatability of time-shifting seismic data
  • Method for measuring repeatability of time-shifting seismic data
  • Method for measuring repeatability of time-shifting 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 invention discloses a method for measuring the repeatability of time-shifting seismic data, and belongs to the technical field of oilfield exploration. The method comprises the following steps of:comparing the size of start data with the size of monitoring data to obtain difference data, then obtaining Kaiser window Hilbert trace data corresponding to the start data, the monitoring data and the difference data by using a Kaiser window Hilbert operator, furthermore obtaining the envelope data of the seismic data, calculating the envelope sum by utilizing the envelope data, obtaining an envelope feature repeatability factor, finally determining the threshold value of a truncation door, converting the envelope feature repeatability factor into an envelope feature repeatability indicativefactor by using the threshold value of the truncation door, and thus, whether the seismic data has the repeatability can be intuitively measured according to the envelope feature repeatability indicative factor with the value of 0 or 1.

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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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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