Method and apparatus for quantitatively judging formation of carbonatite cement and hydrocarbon charge sequence

Abstract

The invention provides a method and an apparatus for quantitatively judging formation of carbonatite cement and hydrocarbon charge sequence. The method comprises the following steps: collecting a dense reservoir core / outcrop sample which is made into a thin sheet; judging a formation period of the cement on the thin sheet by using cathode luminescence; performing chloroform extraction on the thinsheet and pulverizing the same by stages; reacting pulverized powder with concentrated phosphoric acid to obtain carbon dioxide; purifying the carbon dioxide, performing isotope analyzing to obtain a13C18O16O value, and calculating a formation temperature of the carbonatite cement in combination with an empirical formula; obtaining a homogenization temperature of an oil and gas inclusion and a saline inclusion; determining a thermal history curve in combination with basin modeling; marking the hydrocarbon charge sequence represented by the formation temperature of the carbonatite cement and the homogenization temperature of the saline inclusion on a thermal history curve, and determining the formation of the carbonatite cement and the hydrocarbon charge sequence. According to the method and the apparatus for quantitatively judging the formation of the carbonatite cement and the hydrocarbon charge sequence, a forming process of the dense hydrocarbon can be recognized quantitatively andaccurately.

Description

technical field [0001] The present invention relates to a method and device for quantitatively determining the timing sequence of carbonate rock cement formation and oil-gas charging, in particular to a method and device for quantitatively determining the timing sequence of carbonate rock cement formation and oil-gas charging in tight reservoirs. It belongs to the technical field of petroleum exploration. Background technique [0002] In recent years, unconventional tight oil and gas resources have become one of the focuses of oil and gas geological research and oil and gas exploration at home and abroad. The research on tight oil focuses on the characterization of micro-nano-scale pore throats in tight reservoirs, the influence of micro-nano-scale pore throats on physical properties, the formation conditions of tight oil, the selection of "sweet spots", the occurrence state of tight oil and the movable amount and other fields. Compared with conventional reservoirs, the po...

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Problems solved by technology

There are few reports on the combination of the heterogeneity of tight oil reservoirs and the timing of diagenesis-hydrocarbon charging, especially the accurate determination of the formation time of calcareous cement is a major problem in diagenesis research.

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