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Method and device for determining distribution of trachyte

A trachyte and core technology, which is applied in the field of determination methods and devices for trachyte distribution, can solve problems such as unsatisfactory prediction results, lack of pertinence, complex geophysical response characteristics, etc., and achieve the goal of guiding exploration and development Effect

Active Publication Date: 2016-11-23
PETROCHINA CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

However, because trachytes have special lithology, complex geophysical response characteristics, rapid lateral changes, and poor distribution regularity, the prediction of trachyte distribution is still a worldwide problem.
[0004] Judging from the research status at home and abroad, methods such as gravity and magnetic exploration, microseismic technology, and direct interpretation of seismic sections are often used for volcanic rock prediction, but for trachyte, these methods are not specific
In addition, some domestic scholars have tried to use lithofacies analysis combined with seismic inversion technology to make predictions, but due to the limitations of single seismic technology, the prediction results are not very satisfactory

Method used

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  • Method and device for determining distribution of trachyte
  • Method and device for determining distribution of trachyte
  • Method and device for determining distribution of trachyte

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Embodiment Construction

[0051] 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.

[0052] 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.

[0053] The purpose of the present invention is to provide a method and de...

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Abstract

The invention discloses a method and a device for determinin distribution of trachyte. The method comprises the following steps: selecting a specified electrical parameter by core and logging analysis of a target reservoir, wherein the specified electrical parameter comprises natural gamma, density and acoustic wave time difference; converting the acoustic wave time difference and density into a longitudinal wave impedance, and then performing cross processing on the longitudinal wave impedance and the natural gamma to obtain a geophysical response threshold value of trachyte; based on the geophysical response threshold value of trachyte, according to the natural gamma response characteristic and the longitudinal wave impedance characteristic, carrying out joint natural gamma inversion and longitudinal wave impedance inversion based on pure wave amplitude-preserved seismic data to obtain a first prediction result of the distribution of trachyte. The method and device for determining the distribution of trachyte provided by the invention has the advantages of accurately predicting the distribution of trachyte, thus guiding the exploration and development of a trachyte oil-gas reservoir.

Description

technical field [0001] The invention relates to the technical field of petroleum exploration and development, in particular to a method and device for determining the distribution of trachyte. Background technique [0002] In the 1970s, China discovered large-scale trachyte for the first time in the Liaohe Basin, and a large amount of oil and gas resources were discovered in the trachyte, which attracted extensive attention in the field of oil and gas exploration. Trachyte is formed in the effusive and eruptive phases of volcanic activity, and belongs to neutral volcanic extrusive rocks. Specifically, trachyte refers to a rock with trachyte as the main component (content), the composition is equivalent to syenite, the matrix is ​​aphanitic, and the main mineral is feldspar with trachyte structure. Among them, feldspar contains a large amount of new-born potassium feldspar and albite plagioclase; it has porphyritic structure, massive structure, breccia structure, and stomata...

Claims

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Application Information

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IPC IPC(8): G01V11/00
CPCG01V11/00
Inventor 董文波马成龙崔洁刘恩君
Owner PETROCHINA CO LTD
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