A method and apparatus for determine weathering potential energy index of rock while drill in geological logging

Abstract

The invention relates to a method and a device for determining a weathering potential energy index of rock while drilling in geological logging, belonging to the technical field of rock weathering discrimination. At first, that invention measures the chemical element contents in core and cuttings at different drilling depths in the petroleum drill site of the research area to obtain the chemical element contents at different depths; Then the chemical element contents at different depths are brought into the element weathering potential energy index calculation model to determine the element weathering potential energy index at different depths, where the element weathering potential energy index includes Parker weathering potential energy index FWIP and/or granite weathering potential energy index FWIG. The element weathering potential energy index obtained by the invention has high timeliness, and the element weathering potential energy index obtained by the invention can continuouslychange with the well depth, and is more widely applied, and the problems of low timeliness and discontinuity of the weathering potential energy index obtained by the laboratory are overcome.

Description

technical field [0001] The invention relates to a method and a device for determining a rock weathering potential energy index while drilling in geological mud logging, and belongs to the technical field of rock weathering discrimination. Background technique [0002] Weathering refers to the process of breaking rocks and decomposing unstable minerals under physical, chemical and biological actions, which is of great significance in petroleum geology research. During the weathering process, with the decomposition of unstable minerals, the rock elements are constantly changing. First, the active alkali metal elements (Na, K) and alkaline earth metal elements (Ca, Mg) are dissolved and leached, and then the elements containing P, S, and Si are dissolved and leached. Decomposition of elemental minerals, along with the weathering process, due to the relative loss of other components, relatively stable elements Fe, Al, and Ti are relatively enriched. Therefore, according to the ...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for determining rock weathering potential energy index while drilling in geological logging, so as to solve the problem that the obtained weathering potential energy index is not timely and discontinuous b

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