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Method and device for determining dynamic change process of ancient karst diving surface

A technology of dynamic changes and determination methods, applied in teaching models, geophysical measurements, instruments, etc., can solve problems such as lack of research on the dynamic evolution process of paleokarst belts

Pending Publication Date: 2022-07-19
PETROCHINA CO LTD
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Problems solved by technology

[0003] At present, domestic scholars have carried out a wealth of research on paleokarst zones in the supergene period of various basins, but they mainly focus on the development characteristics of paleokarst zones formed in the past in the current underground, and lack of research on the paleokarst water table in a certain period of surface exposure in the past. Study on the Dynamic Evolution Process of Paleokarst Zone Caused by Period Changes

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  • Method and device for determining dynamic change process of ancient karst diving surface
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  • Method and device for determining dynamic change process of ancient karst diving surface

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[0056] In order for those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described The embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present application.

[0057] In the description of this specification, the use of "comprising", "including", "having", "containing" and the like are all open-ended terms, that is, meaning including but not limited to. Description with reference to the terms "one embodiment", "one particular embodiment", "some embodiments", "for example"...

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Abstract

The invention provides a method and device for determining the dynamic change process of an ancient karst diving surface, and the method comprises the steps: determining the structural evolution history of a target layer of a research area, and determining the lifting of the ancient karst diving surface of the target layer in a supergene karst period; establishing an ancient karst zone identification and division template; according to the ancient karst zone identification and division template, carrying out different single well vertical ancient karst zone division in a research area, and determining an earth surface karst zone, a vertical seepage zone, a transition zone, a horizontal subsurface flow zone and a deep slow flow zone in each well; dividing a single transition zone in the transition zone, identifying the ancient karst phreatic surface, and determining the vertical change process of the ancient karst phreatic surface of a single well; well-connected karst zone comparison is carried out, and the lateral distribution range of the ancient karst phreatic water surface in the same period is analyzed; and in combination with the ancient karst landform, analyzing the relationship between the ancient karst phreatic surface and the ancient karst landform, determining the longitudinal development position and the transverse distribution range of the ancient karst phreatic surface in different periods, and determining the dynamic change process of the ancient karst phreatic surface.

Description

technical field [0001] The invention relates to a method and a device for determining the dynamic change process of a paleokarst water surface, belonging to the technical field of fine karst zone division and karst process research in the exploration and development stage of oil and gas fields. Background technique [0002] The carbonate karst strata in modern and geological history have obvious vertical zoning, which has been widely recognized by scholars at home and abroad. Some scholars divide zoning according to groundwater pressure and rock formation pressure, some scholars divide zoning according to karst form or karst development degree, and most scholars in the field of geology carry out vertical zoning of epigenetic karst according to groundwater movement mode. Different karst belts in the vertical direction have different groundwater movement patterns, resulting in different development characteristics of pores, caves and fractures in the strata, and great differen...

Claims

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Application Information

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IPC IPC(8): G01V9/00G09B23/40
CPCG01V9/00G09B23/40
Inventor 夏钦禹闫海军张林李新豫俞霁晨罗瑞兰
Owner PETROCHINA CO LTD
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