CN-122017186-A - Method and device for judging carbonate rock sedimentary morphology by using carbon isotopes

Abstract

A method and a device for judging carbonate deposit landforms by using carbon isotopes comprise the steps of selecting a carbonate sample, preparing a carbonate sample sheet and a carbonate powder sample by using the carbonate sample, carrying out sheet identification analysis on the carbonate sample sheet to obtain corresponding carbonate deposit features of each sample sheet, carrying out carbon-oxygen isotope testing on the carbonate powder sample to obtain carbon-oxygen isotope test data, determining carbonate deposit palace landform first features by using the carbon-oxygen isotope test data, and determining carbonate deposit landform features of a target area according to the carbonate deposit features and the carbonate deposit palace landform first features.

Inventors

• HAO YI
• CHEN XIAO
• ZHANG HAO
• WANG YUCE
• PAN LIYIN
• LI MENGYING
• ZHANG JIANYONG
• LI WENZHENG
• GU MINGFENG
• ZHU MAO
• WANG YONGSHENG
• CHEN WEI

Assignees

• 中国石油天然气集团有限公司

Dates

Publication Date

20260512

Application Date

20241112

Claims (10)

1. 1. A method for determining carbonate deposit topography using carbon isotopes, the method comprising: Selecting a carbonate rock sample; Preparing a carbonate sample slice and a carbonate powder sample by using the carbonate sample; Performing sheet identification analysis on the carbonate sample sheets to obtain corresponding carbonate deposit characteristics of each sample sheet; Performing carbon-oxygen isotope test on the carbonate rock powder sample to obtain carbon-oxygen isotope test data; Determining a first feature of carbonate rock sedimentary palace by using carbon-oxygen isotope test data; and determining the carbonate deposit topography feature of the target area according to the carbonate deposit feature and the carbonate deposit paleo-topography first feature.
2. 2. The method for judging carbonate deposit topography using carbon isotopes of claim 1, wherein, The process for selecting the carbonate rock sample comprises the following steps: Dividing a study area into a plurality of target areas; carbonate samples that were not diagrammed were selected from each target zone.
3. 3. The method for judging carbonate deposit topography using carbon isotopes of claim 2, wherein, The carbonate sample wafer and the carbonate powder sample are located in the same target area; The carbonate sample wafer was a 0.03mm rock wafer: The carbonate powder sample was 200 mesh in diameter.
4. 4. The method for judging carbonate deposit topography using carbon isotopes of claim 1, wherein, Performing sheet identification analysis on the carbonate sample sheets to obtain corresponding carbonate deposit characteristics of each sample sheet, wherein the method comprises the following steps: And carrying out slice identification analysis on the carbonate sample slices to obtain corresponding sedimentary lithology, rock structure, paleobiological type and sedimentary characteristics of each sample slice.
5. 5. The method of determining carbonate deposit topography using carbon isotopes of claim 2, wherein determining carbonate deposit paleo-topography using carbon-oxygen isotope test data includes: Respectively establishing a scatter diagram and a box diagram according to carbon-oxygen isotope test data of all carbonate samples; performing comparative analysis according to the scatter diagram and the box diagram to determine a first feature of carbonate deposit paleomorphic features; Wherein, carbonate deposit paleo-topography first characteristic includes paleo-topography deposit high order and paleo-topography deposit low order.
6. 6. The method for determining carbonate deposit topography using carbon isotopes of claim 5, The scatter diagram is a two-dimensional diagram with carbon isotope data as an abscissa and oxygen isotope data as an ordinate; the box-shaped graph is a two-dimensional graph with a target area as an abscissa and carbon isotope data as an ordinate.
7. 7. The method for determining carbonate deposit topography using carbon isotopes of claim 6, wherein, The determining of the first feature of carbonate deposit paleomorphic features by comparative analysis according to the scatter plot and the box plot comprises: Dividing the scatter diagram into a first area and a second area according to the carbon isotope data distribution characteristics in the scatter diagram; and determining the first characteristic of the carbonate deposit paleomorphic feature of each target region according to the carbon isotope data value range of each region.
8. 8. The method for determining carbonate deposit topography using carbon isotopes of claim 7, The determining of the first feature of carbonate deposit paleomorphic features by comparative analysis according to the scatter plot and the box plot comprises: Dividing the box-shaped diagram into a first area and a second area according to the carbon isotope data characteristics of the box-shaped diagram and the regional division value of the scatter diagram; and determining the first feature of the carbonate deposit paleo-topography of each target area according to the division result.
9. 9. An apparatus for determining carbonate deposit topography using carbon isotopes, the apparatus comprising a memory for storing a program for determining carbonate deposit topography using carbon isotopes, and a processor for reading and executing the program for determining carbonate deposit topography using carbon isotopes, performing the method of any one of claims 1-8.
10. 10. A computer-readable storage medium having stored thereon a data processing program that is executed by a processor to perform the method of judging carbonate deposit topography using a carbon isotope of any one of claims 1-8.

Description

Method and device for judging carbonate rock sedimentary morphology by using carbon isotopes Technical Field The present invention relates to the technical field of geological exploration, and particularly to a method and a device for judging carbonate sedimentary landform by using carbon isotopes. Background Carbonate paleo-landforms are of various importance for oil and gas exploration. The method is mainly characterized in that ① is used for controlling the distribution of the sedimentary facies, the paleo-topography influences the sedimentary environment of the carbonate rock, and different types of sedimentary facies can be formed at different geomorphic positions. Such as a plateau edge, may develop a reef pool deposit, which is often a favorable area for formation of a premium reservoir. That is, by studying paleo-topography, the distribution range of some highly geomorphic facially-controlled favorable reservoirs can be predicted indirectly. ② The development of the reservoir is affected, namely, the fluctuation of the paleo-topography of the carbonate can lead to the exposure of the carbonate to different degrees, thereby affecting the development of holes and cracks. For example, in high places of ancient landforms or in slope belts, more pores, karsts and cracks can be formed due to the effects of corrosion, weathering and denudation, so that the physical properties of a reservoir are improved and a good storage space is provided for oil gas. That is, by researching paleomorphology, the distribution area of the karst reservoir can be directly and clearly exposed. ③ And forming an oil-gas trap, wherein certain characteristics of the paleo-physical form can form the oil-gas trap. Such as ancient humps, ancient slopes and the like, may form structural traps or stratum traps, which are beneficial to the accumulation and preservation of oil gas. In view of the above, identification and prediction of carbonate deposit paleo-topography is very important. Therefore, how to realize a method for accurately judging carbonate rock sedimentary morphology by using carbon isotopes is a problem to be solved. Disclosure of Invention The application provides a method and a device for judging carbonate deposit landforms by using carbon isotopes, which are capable of rapidly and efficiently judging paleo-landforms by using carbon isotope delta 13C per mill (VPDB) analysis data and combining microscopic slice microscopic identification results, improving the efficiency and accuracy of judging carbonate deposit-period landforms and providing a theoretical basis for the distribution rule of carbonate deposit landforms. In a first aspect, the application provides a method for judging carbonate deposit topography by using carbon isotopes, which comprises the steps of selecting a carbonate sample, preparing a carbonate sample slice and a carbonate sample by using the carbonate sample, carrying out slice identification analysis on the carbonate sample slice to obtain corresponding carbonate deposit characteristics of each sample slice, carrying out carbon-oxygen isotope test on the carbonate sample to obtain carbon-oxygen isotope test data, determining carbonate deposit palace first characteristics by using the carbon-oxygen isotope test data, and determining carbonate deposit topography characteristics of a target area according to the carbonate deposit characteristics and the carbonate deposit palace first characteristics. In a second aspect, an embodiment of the present invention further provides an apparatus for determining carbonate deposition topography using carbon isotopes, where the apparatus includes a memory for storing a program for determining carbonate deposition topography using carbon isotopes, and a processor for reading and executing the program for determining carbonate deposition topography using carbon isotopes, and executing the method according to any of the above embodiments. In a third aspect, embodiments of the present invention further provide a computer readable storage medium having stored thereon a data processing program for execution by a processor of the method of any one of the above embodiments for determining carbonate deposit topography using carbon isotopes. Compared with the related art, the method and the device for judging carbonate sedimentary features by using the carbon isotopes comprise the steps of selecting a carbonate sample, preparing a carbonate sample slice and a carbonate powder sample by using the carbonate sample, carrying out slice identification analysis on the carbonate sample slice to obtain corresponding carbonate sedimentary features of each sample slice, carrying out carbon-oxygen isotope test on the carbonate powder sample to obtain carbon-oxygen isotope test data, determining carbonate sedimentary feature first features by using the carbon-oxygen isotope test data, and determining carbonate sedimentary feature features of a target area according to the carbonat