Method and device for identifying dolomite petrifaction action process

Abstract

The invention provides a method and device for identifying the dolomite petrifaction action process, and the method comprises the steps: determining the characteristics of a dolomite crystal and the structure characteristics of the dolomite crystal, the crystal characteristics comprising the crystal size, the crystal form, the crystal structure and the relation between different dolomite and a protolith structure; determining a geochemical analysis project and a geochemical analysis sequence corresponding to the crystal characteristics according to the crystal characteristics so as to generate a geochemical analysis result of the dolomite; and analyzing the dolomite petrifaction process according to the crystal characteristics, the fabric characteristics and the geochemical analysis result. According to the dolomite petrifaction process identification method and device provided by the invention, the dolomite formation period and the dolomite petrifaction process can be reliably known.

Description

technical field [0001] The invention relates to the technical field of geological exploration and oil and gas exploration, in particular to a method and device for identifying a dolomitization process. Background technique [0002] Dolomite is an important oil and gas reservoir rock, and the oil and gas resources discovered in it account for more than half of the oil and gas resources in carbonate rocks, and more than 80% in North America (Zenger et al., 1980), which shows that dolomite is important for oil and gas resources. sex. For the origin of dolomite, various dolomitization models have been proposed and confirmed (Warren, 2000), such as evaporation pump (Bush, 1973; Warren, 1991), seawater (Land, 1985; Warren, 1988, 1990), Osmotic reflux (Adams and Rhodes, 1960; Warren, 1999), burial (Heydari, 1997; Warren, 1999; Qing and Mountjoy, 1994), hydrothermal (Hardie, 1991; Warren and Kempton, 1997) and microbial dolomitization ( Lasic, 1995; Warthmann et al., 2005) et al. ...

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Problems solved by technology

[0004] However, the above method has at least the following defects: First, the genetic type of dolomite identified by the existing technology is a terminal product, and the analysis of the dolomitization process has not been realized, which is not conducive to a deep understanding of the factors controlling the development of dolomite; This is due to lack of in-depth understanding of dolomite crystal characteristics in the genetic analysis of dolomite, and the lack of understanding of the superposition effect of dolomitization stages. It may mislead the identification of dolomite origin

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