Method for recovering paleo-lava flow direction and original form of volcano mechanism based on electric imaging logging

A primitive form, electrical imaging technology, applied in electrical/magnetic detection, electrical/magnetic exploration, radio wave measurement system for logging records, etc. simple effect

Active Publication Date: 2021-01-12
XI'AN PETROLEUM UNIVERSITY
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Problems solved by technology

Aiming at the ancient volcanic institutions developed in geological history, this proposal proposes a method to restore the orientation of ancient lava flows and the original shape of ancient volcan

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  • Method for recovering paleo-lava flow direction and original form of volcano mechanism based on electric imaging logging
  • Method for recovering paleo-lava flow direction and original form of volcano mechanism based on electric imaging logging
  • Method for recovering paleo-lava flow direction and original form of volcano mechanism based on electric imaging logging

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Embodiment

[0037] This embodiment relates to a method for recovering the orientation of ancient lava flows and the original form of volcanic institutions based on electrical imaging logging; for the specific process, see figure 1 shown.

[0038] This embodiment takes the Xushen No. 9 volcanic institution in the Xujiaweizi fault depression in the Songliao Basin in eastern my country as an example.

[0039]The volcanic institution developed huge thick volcanic rocks in the Lower Cretaceous Yingcheng Formation. After the development of volcanic rocks in the Yingcheng Formation, the lithosphere began to cool and shrink, resulting in uneven subsidence of the crust, and the entire study area entered the depression stage. However, subsidence within the region usually does not lead to major changes in stratigraphic dip. There are also multiple periods of structural inversion during the depression period in the area, such as the end of the Yingcheng Formation, the end of the Nenjiang Formation, ...

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Abstract

The invention provides a method for recovering a paleo-lava flow direction and an original form of a volcano mechanism based on electric imaging logging. The method comprises the steps: 1, determiningthe occurrence of a volcano lava layer interface based on electric imaging logging; 2, determining the occurrence of tuff or tuff mudstone based on electric imaging logging; 3, eliminating structuralinformation of the lava layer; and 4, recovering the original form of the volcano mechanism based on multi-well rock stratum comparison. The occurrence of the volcano lava layer is determined based on a flow pattern structure and a blocky lava unit interface; the structural deformation degree is determined based on the occurrence of tuff and tuff mudstone; lava stratum occurrence structure correction and paleo-lava flow orientation judgment are carried out based on the occurrence of the tuff and tuff mudstone; and the original form of the ancient volcano mechanism is determined based on the well spacing, the paleo-lava flow orientation, the lithofacies and the rock stratum thickness change. According to the scheme provided by the invention, the operation is simple, and the purpose can bedirectly achieved only through electric imaging logging data.

Description

technical field [0001] The invention belongs to the field of methods for restoring volcanic mechanisms; in particular, it relates to a method for restoring the orientation of ancient lava flows and the original form of volcanic mechanisms based on electrical imaging well logging. Background technique [0002] Paleo-volcanic institutions are an important type of geological body containing (solid) ore and oil-gas resources, such as the volcanic gas reservoir of the Lower Cretaceous Yingcheng Formation in the Xujiaweizi fault depression of the Songliao Basin in eastern my country. These ancient volcanic institutions suffered from different degrees of compression or tensile structural deformation during the reformation period of the basin. Therefore, the current spatial form and the occurrence of lava formations cannot reflect the morphological scale of the volcanic institutions when they first developed. To be corrected recovery. At the same time, the restoration of the orient...

Claims

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Application Information

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IPC IPC(8): G01N33/24G01V3/26G01V3/38
CPCG01N33/24G01V3/26G01V3/38
Inventor 年涛赫文昊郭望于洲马进侯涛罗丹婷王力孟嘉轶李彦泽苍丹何文军费李莹
Owner XI'AN PETROLEUM UNIVERSITY
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