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Sedimentary stratum dividing method

A stratum and sediment technology, applied in seismic signal processing, seismology for logging records, special data processing applications, etc., can solve the problems of increasing the difficulty of stratum division and comparison, reduce errors and make up for resolution Lower, higher vertical resolution effect

Inactive Publication Date: 2014-09-10
RES INST OF SHAANXI YANCHANG PETROLEUM GRP
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Problems solved by technology

However, in areas with active tectonic activities, due to the frequent changes of interlayers, it is more difficult to divide and correlate stratigraphy

Method used

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Embodiment Construction

[0026] The present invention will be described in further detail below.

[0027] The present invention provides a method for dividing sedimentary strata. Using the reflection coefficient calculation method in the principle of seismic exploration, the seismic reflection coefficient curve is fitted from the logging curve, and the sedimentary strata are divided according to the characteristics of the reflection coefficient at different positions in the seismic reflection coefficient curve. The seismic reflection coefficient is the response characteristic of the developed sedimentary strata itself, and the judgment basis of the stratum division is based on the reflection coefficient, which is more real and accurate than artificial division. At the same time, due to the high vertical resolution of well logging curves, the anomalous features of the fitted seismic reflection coefficient curves can intuitively reflect the lithological changes of sedimentary strata, which can make up f...

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Abstract

The invention belongs to the field of oil-gas geological exploration, and relates to a sedimentary stratum dividing method. By means of a seismic stratigraphy research method, a seismic reflection coefficient curve is fitted through a logging curve, and accordingly a sedimentary stratum is divided and compared through reflection coefficient features of a deposition interface. The method solves the scientific research situation that area marker beds lack and accordingly strata can not be divided and compared, can overcome the defect that a seismic division vertical sequence resolution ratio is low, and reduces errors caused by manual division and comparison of the strata.

Description

technical field [0001] The invention belongs to the field of oil and gas geological exploration, in particular to a method for dividing sedimentary strata. Background technique [0002] Drilling and exploration, as the main method of oil and gas geology, is becoming more and more mature. In particular, the rapid development of logging technology can more truly reflect the subsurface depositional conditions. However, in areas with active tectonic activities, due to the frequent changes of interlayers, stratigraphic division and correlation are more difficult. Contents of the invention [0003] The invention provides a method for dividing sedimentary strata. Using seismic stratigraphy research, the reflection coefficient calculation method in the principle of seismic exploration is applied to the division of sedimentary strata, and then the stratum is compared. [0004] The present invention realizes through following technical scheme: [0005] The invention relates to a ...

Claims

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Application Information

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IPC IPC(8): G06F19/00G01V1/50
Inventor 王香增杜燕苗小龙于波耿龙祥戚保良朱晴程玉群尹锦涛白奋飞周康
Owner RES INST OF SHAANXI YANCHANG PETROLEUM GRP
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