CN112859199B

CN112859199B - Method for recovering evolution history of carbonate rock diagenetic environment

Info

Publication number: CN112859199B
Application number: CN202110027960.7A
Authority: CN
Inventors: 沈安江; 胡安平; 赵文智; 姚根顺; 乔占峰; 张建勇; 倪新锋; 郑剑锋; 梁峰; 王永生
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2021-01-08
Filing date: 2021-01-08
Publication date: 2024-03-05
Anticipated expiration: 2041-01-08
Also published as: CN112859199A

Abstract

The invention provides a carbonate rock diagenetic environment evolution history recovery method, which comprises the following steps: acquiring a rock sample for recovering the evolution history of the diagenetic environment of the work area; determining the period of carbonate diagenetic minerals in the rock sample and the types of the carbonate diagenetic minerals in each period; isotope measurement is carried out on carbonate diagenetic minerals of each period to obtain absolute age, cluster isotope test is carried out to obtain formation temperature, and geochemical analysis is carried out to obtain geochemical analysis results; acquiring a work area burial history model, and acquiring burial depth by combining absolute ages of subcarbonate diagenetic minerals in each period; determining the diagenetic environment of the sub-carbonate diagenetic minerals of each period based on the absolute age, formation temperature, burial depth and geochemical analysis results of the sub-carbonate diagenetic minerals of each period; based on the type, diagenetic environment and absolute age of each stage of subcarbonate diagenetic mineral, the relationship between carbonate diagenetic mineral type-diagenetic environment and absolute age in an absolute age coordinate system is established.

Description

Method for recovering evolution history of carbonate rock diagenetic environment

Technical Field

The invention belongs to the technical field of carbonate rock hydrocarbon reservoir evaluation in petroleum and natural gas geological exploration, and particularly relates to a recovery method of carbonate rock diagenetic environment evolution history under an absolute age coordinate system based on year and temperature measurement technology.

Background

The diagenetic environment comprises a seawater diagenetic environment (normal seawater and evaporated seawater), an atmospheric fresh water diagenetic environment (early and late surface growth) and a buried diagenetic environment. Carbonate pore modification events in the layer sequence lattice are all occurring in various diagenetic environments, and the potential for pore modification is greatly different in different diagenetic environments. The normal seawater diagenetic environment is mainly built by primary holes, and the cementing effect can fill part of the primary holes. The atmosphere fresh water diagenetic environment is mainly built by corrosion holes, and even large cavities are formed. The buried diagenetic environment predominates by destruction of the reservoir space, although the buried erosion effects can lead to localized enrichment of the pores. Dolomite petrochemical industry mainly occurs in the environment of evaporating seawater and burying rock, and is a very important pore modification effect. The diagenetic environment identification is very important to study carbonate reservoir causes.

The geochemical characteristics of reservoirs (carbon-oxygen stable isotopes, micro-rare earth elements, strontium isotopes, ca/Mg/Fe/Mn and other non-traditional stable isotopes) are very important means for identifying the diagenetic environment, and an identification plate is established, but two unsolved problems still exist. On the one hand, the diagenetic environment judgment of diagenetic products is mainly qualitative judgment of geologists on the basis of researches of regional geological background, diagenetic sequences and the like, and because of no restriction of age and temperature data and great uncertainty, the established identification plate only can represent geochemical characteristics of the diagenetic products, and the reliable corresponding relation between the geochemical characteristics and the diagenetic environment is difficult to establish. On the other hand, the occurrence time of the diagenetic environment transition and the pore-forming event under the absolute age coordinate system cannot be established without the constraint of age and temperature data, so that the understanding of the pore-forming event and pore-forming effect under the control of the regional structure geological background is restricted, and the understanding is very important for reservoir cause and distribution prediction.

Carbonate laser in situ U-Pb isotope annual and cluster isotope (. DELTA. ₄₇ ) The development of two technologies of temperature measurement provides possibility for diagenetic environment judgment and evolution of diagenetic products under an absolute age coordinate system, geochemical characteristics and evolution research.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide an effective method for recovering the evolution history of the diagenetic environment of the carbonate rock, which is based on the constraint of the absolute age of diagenetic minerals and the isotope temperature of clusters and explores the evolution condition of the diagenetic environment of the diagenetic minerals under an absolute age coordinate system.

In order to achieve the above object, the present invention provides a carbonate rock diagenetic environment evolution history recovery method, wherein the method comprises:

acquiring a rock sample for restoring the evolution history of the diagenetic environment of a working area, wherein the characteristics of the rock sample for restoring the evolution history of the diagenetic environment comprise the development of holes, the filling of the holes with multi-stage (at least two stages) carbonate cements and the existence of the carbonate cements for intersecting each other;

determining the period of carbonate diagenetic minerals in the rock sample and the types of the carbonate diagenetic minerals in each period; isotope year measurement is carried out on carbonate diagenetic minerals of each period to obtain absolute ages of the carbonate diagenetic minerals of each period; performing cluster isotope testing on carbonate diagenetic minerals of each period to obtain the formation temperature of the carbonate diagenetic minerals of each period; geochemical analysis is carried out on each period of subcarbonate rock to obtain geochemical analysis results of each period of subcarbonate diagenetic mineral, wherein the geochemical analysis comprises at least one of strontium isotope analysis, trace rare earth element analysis, cathodoluminescence and carbon-oxygen stable isotope analysis;

Acquiring a work area burial history model, and acquiring burial depth of each period of subcarbonate diagenetic mineral by combining absolute ages of each period of subcarbonate diagenetic mineral;

determining the diagenetic environment of each stage of subcarbonate diagenetic minerals based on the absolute age, formation temperature, depth of burial, and geochemical analysis results of each stage of subcarbonate diagenetic minerals;

based on the type, the diagenetic environment and the absolute age of the subcarbonate diagenetic mineral at each stage, a relationship of carbonate diagenetic mineral type-diagenetic environment and absolute age in an absolute age coordinate system is established.

In the carbonate rock environment evolution history recovery method provided by the invention, carbonate rock minerals comprise carbonate cements and surrounding rocks.

In the carbonate rock diagenetic environment evolution history recovery method, the rock sample with the characteristics of pore development, filling of multiple (at least two) phases of carbonate cements in the pores is easy to establish complete and reliable diagenetic sequences so as to determine the period of carbonate diagenetic minerals in the rock sample; in particular, a complete and reliable diagenetic sequence may be established using conventional methods, such as establishing a complete and reliable diagenetic sequence based on the age, character, age, cross-relationship of carbonate cements in the rock sample, erosion age, age of eroded carbonate cements, and the like.

In the above-described method for recovering the evolution history of the carbonate rock formation environment, it is preferable that, when determining the period and the type of each period of the carbonate rock formation mineral in the rock sample, a sample sheet made of the rock sample is used; more preferably, the thickness of the sample sheet for specifying the period of carbonate diagenetic mineral and the type of each period of carbonate diagenetic mineral in the rock sample is 30.+ -.3. Mu.m.

In the above-described method for recovering the evolution history of the diagenetic environment of carbonate rock, it is preferable that isotope testing is performed using a sample sheet made of a rock sample; more preferably, the thickness of the sample wafer for performing isotope testing is 80-100 μm. In one embodiment, the thickness of the sample wafer used for isotope testing is 100 μm.

In the above-described method for restoring the evolution history of the carbonate rock formation environment, it is preferable that the cluster isotope test is performed using a powder sample of each phase of the subcarbonate rock-forming mineral made of a rock sample; more preferably, the mass of the powder sample used for performing the cluster isotope test is not less than 10mg.

In the above-described method for recovering the evolution history of the carbonate rock formation environment, it is preferable that the analysis of the strontium isotope values is performed using powder samples of each phase of the subcarbonate rock-forming mineral made of a rock sample; more preferably, the mass of the powder sample for performing the strontium isotope value analysis is not less than 1mg.

In the above-described method for recovering the evolution history of the carbonate rock formation environment, preferably, the analysis of the trace rare earth elements is performed using a sample sheet made of a rock sample; more preferably, the thickness of the sample sheet for performing the micro rare earth element analysis is 80 to 100 μm. In one embodiment, the sample sheet for performing the trace rare earth element analysis has a thickness of 100 μm.

In the above-described method for recovering the evolution history of the carbonate rock formation environment, it is preferable that carbon-oxygen stable isotope analysis is performed using a sample sheet made of a rock sample; more preferably, the thickness of the sample sheet for performing carbon-oxygen stable isotope analysis is 60-70 μm. In one embodiment, the sample wafer for performing carbon-oxygen stable isotope analysis has a thickness of 60 μm.

In the above-described method for recovering the evolution history of the carbonate rock formation environment, it is preferable that the cathodoluminescence analysis is performed using a sample sheet made of a rock sample; more preferably, the thickness of the sample sheet used for performing the cathodoluminescence analysis is 30.+ -.3. Mu.m.

In one embodiment, the method for recovering evolution history of carbonate rock formation environment includes:

Preparing at least 2 parallel samples corresponding to each rock sample aiming at the obtained rock sample for recovering the evolution history of each rock formation environment, preparing a sample sheet A, a sample sheet B and a sample sheet C of the rock sample for recovering the evolution history of each rock formation environment by using the parallel samples, and reserving the residual parts of the parallel samples;

for each obtained rock sample, observing carbonate diagenetic minerals of the sample sheet A, and determining the period of the carbonate diagenetic minerals and the types of the carbonate diagenetic minerals of each period in the rock sample;

determining powder samples of carbonate diagenetic minerals corresponding to the sub-carbonate diagenetic minerals of each stage of a sample sheet A of the rock sample in the parallel sample residual parts corresponding to the rock samples for restoring diagenetic environmental evolution history, and performing cluster isotope testing to obtain cluster isotope temperatures of the sub-carbonate diagenetic minerals of each stage;

in a sample slice B corresponding to a rock sample for recovering the evolution history of the diagenetic environment, determining carbonate diagenetic minerals corresponding to the sub-carbonate diagenetic minerals of each period in the sample slice A of the rock sample, and acquiring absolute ages of the sub-carbonate diagenetic minerals of each period by isotope testing;

determining a powder sample of carbonate diagenetic mineral corresponding to the sub-carbonate diagenetic mineral of each period of a sample sheet A of the rock sample in the parallel sample residual part corresponding to the rock sample for restoring the diagenetic environmental evolution history, and performing strontium isotope analysis to obtain a strontium isotope analysis result of the sub-carbonate diagenetic mineral of each period;

In a sample slice B corresponding to a rock sample for recovering the evolution history of a diagenetic environment, determining carbonate diagenetic minerals corresponding to the sub-carbonate diagenetic minerals of each stage in the sample slice A of the rock sample, and performing trace rare earth element analysis to obtain a trace rare earth element analysis result of the sub-carbonate diagenetic minerals of each stage;

in a sample slice C corresponding to a rock sample for recovering the evolution history of a diagenetic environment, determining carbonate diagenetic minerals corresponding to the sub-carbonate diagenetic minerals of each stage in the sample slice A of the rock sample, and performing carbon-oxygen stable isotope analysis to obtain carbon-oxygen stable isotope analysis results of the sub-carbonate diagenetic minerals of each stage;

performing cathodoluminescence analysis on the sample sheet A to obtain cathodoluminescence analysis results of the secondary carbonate diagenetic minerals in each period;

determining the diagenetic environment of the sub-carbonate diagenetic minerals of each period based on the absolute age, formation temperature, burial depth, strontium isotope analysis result, carbon-oxygen stable isotope analysis result, trace rare earth element analysis result and cathodoluminescence analysis result of the sub-carbonate diagenetic minerals of each period;

Preferably, the thickness of the sample sheet A is 30+ -3 μm;

preferably, the thickness of the sample sheet B is 80-100 μm;

preferably, the thickness of the sample sheet C is 60-70 μm;

preferably, the diameter of the sample sheet A is 1.5-2.5cm;

preferably, the diameter of the sample sheet B is 1.5-2.5cm;

preferably, the diameter of the sample sheet C is 1.5-2.5cm;

preferably, the preparing of at least 2 parallel samples corresponding to each rock sample for restoring the evolution history of the diagenetic environment respectively, preparing a sample slice A, a sample slice B and a sample slice C of the rock sample for restoring the evolution history of the diagenetic environment by using the parallel samples and reserving the residual parts of the parallel samples is performed by the following steps: cutting each rock sample for restoring the evolution history of the diagenetic environment into cylinders with the diameter of 1.5-2.5cm and the thickness of 0.8cm, preparing 2 parallel samples along two sides of the section, preparing a sample sheet A and a sample sheet B from 1 parallel sample, preparing a sheet C from the other 1 parallel sample, and reserving the residual part of the parallel samples for later use;

Preferably, the mirror image similarity of the sample slice A, the sample slice B and the sample slice C is high and is not lower than 90%;

preferably, the powder sample of each carbonate diagenetic mineral used for performing the cluster isotope test is not less than 10mg;

preferably, the powder sample of each carbonate diagenetic mineral for strontium isotope analysis is not less than 1mg.

In the comprehensive analysis method for the hydrocarbon reservoir period of the carbonate rock, the powder sample can be obtained by using a micro drill.

In the comprehensive analysis method for the hydrocarbon reservoir period of the carbonate rock, isotope year measurement can be performed according to the specification and the requirements of the isotope year measurement technology.

In the comprehensive analysis method for the hydrocarbon reservoir period of the carbonate rock, the trace rare earth element analysis can be performed by adopting an in-situ trace rare earth element test technology.

In the comprehensive analysis method for the hydrocarbon reservoir period of the carbonate rock, the carbon-oxygen stable isotope analysis can carry out test work according to the specification and the requirement of carbon-oxygen stable isotope measurement to obtain the carbon-oxygen stable isotope value of the carbonate rock mineral in each period.

In the comprehensive analysis method for the carbonate rock oil gas reservoir period, the cluster isotope test can carry out temperature measurement work according to the specification and the requirement of the cluster isotope (delta 47) temperature measurement technology to obtain the delta 47 temperature of carbonate rock minerals in each period.

In the comprehensive analysis method for the secondary carbonate rock oil gas storage period, the strontium isotope analysis can carry out test work according to the specification and the requirement of the strontium isotope determination technology to obtain the strontium isotope value of the carbonate rock minerals in each period.

In the above comprehensive analysis method for carbonate rock oil gas reservoir period, based on the type, the diagenetic environment and the absolute age of the diagenetic mineral of each period, the relationship between the carbonate diagenetic mineral type-diagenetic environment and the absolute age under the absolute age coordinate system can be realized by the following means:

and (3) adding the carbonate diagenetic mineral of each period into the buried history model according to the absolute age, and specifically establishing the type of the carbonate diagenetic mineral of each period and the change curve of diagenetic environment along with absolute age as the relation between the type of the carbonate diagenetic mineral and diagenetic environment and absolute age under the absolute age coordinate system.

In the above method for recovering evolution history of carbonate rock formation environment, preferably, the isotope year measurement is performed by using a laser in-situ U-Pb isotope year measurement method.

In the above method for recovering evolution history of a carbonate rock formation environment, preferably, the obtaining the mining area buried history model includes:

Based on regional geological background, drilling and seismic data, initially establishing a work area buried history model;

acquiring a ground temperature gradient of a work area;

correcting the preliminarily established working area buried history model by utilizing the absolute age of each period of subcarbonate diagenetic mineral and the formation temperature of each period of subcarbonate diagenetic mineral and combining the working area ground temperature gradient, and acquiring the corrected buried history model of the working area as the working area buried history model for acquiring the buried depth of each period of subcarbonate diagenetic mineral by combining the absolute age of each period of subcarbonate diagenetic mineral;

more preferably, the correcting the preliminarily established mining area embedding history model by using the absolute age of each period of the subcarbonate diagenetic mineral and the formation temperature of each period of the subcarbonate diagenetic mineral and combining the mining area ground temperature gradient comprises:

the absolute age of each period of subcarbonate diagenetic mineral is added to a buried history model to obtain the first buried depth of each period of subcarbonate diagenetic mineral, and the formation temperature of each period of subcarbonate diagenetic mineral is calculated to obtain the second buried depth of each period of subcarbonate diagenetic mineral according to the ground temperature gradient;

if the first and second depths of burial of each stage of subcarbonate cement are inconsistent, the burial history curve is unreliable, and the burial history curve is modified so that the first and second depths of each stage of subcarbonate cement are consistent, thereby obtaining a corrected burial history curve for the work area;

If the first and second depths of burial of each stage of subcarbonate cement are consistent, the absolute age of each stage of subcarbonate cement and the formation temperature of each stage of subcarbonate cement are considered to form a mutual evidence relationship, the burial history curve is reliable, and the burial history curve is used as a work area corrected burial curve model.

In the above-described carbonate rock formation environment evolution history recovery method, preferably, the formation environment includes a seawater formation environment, an atmospheric fresh water formation environment, and a buried formation environment; the seawater diagenetic environment comprises a normal seawater diagenetic environment and an evaporated seawater diagenetic environment, and the atmospheric fresh water diagenetic environment comprises an early-table generation rock environment and a late-table generation rock environment.

In the above method for recovering evolution history of carbonate diagenetic environment, determining diagenetic environment of the carbonate diagenetic mineral of each period may be performed in a conventional manner based on absolute age, formation temperature, burial depth and geochemical analysis result of the carbonate diagenetic mineral of each period, specifically may be performed in the following manner: preliminary determining the diagenetic environment of the sub-carbonate diagenetic minerals of each period by adopting a geochemical analysis result (which is carried out in a conventional mode in the field);

And carrying out constraint correction on the diagenetic environment of the initially determined sub-carbonate diagenetic minerals of each period based on the absolute age, formation temperature and burial depth of the sub-carbonate diagenetic minerals of each period.

In the above method for recovering evolution history of a carbonate rock formation environment, preferably, the method further comprises:

based on the established relation between the carbonate diagenetic mineral type-diagenetic environment and absolute age under the absolute age coordinate system, the type of each stage of sub-carbonate diagenetic mineral and the geochemical analysis result of each stage of sub-carbonate diagenetic mineral, the corresponding relation between the carbonate diagenetic mineral type and/or diagenetic environment and the geochemical characteristics is established. In the preferred scheme, instead of establishing geochemical feature identification plates of different diagenetic environments, the geochemical features of the same diagenetic environment can also show great differences under different geological contexts in fact, and it is impossible to establish a geochemical feature identification plate of diagenetic environments with universal applicabilityThe method comprises the steps of carrying out a first treatment on the surface of the The preferred way is by absolute age of the diagenetic product and cluster isotope (delta ₄₇ ) And (3) the temperature constraint is used for establishing the relation between the carbonate diagenetic mineral type and diagenetic environment under an absolute age coordinate system and absolute age, and then establishing the evolution rule of the geochemical characteristic along with diagenetic environment transition through the test data of the geochemical characteristic (carbon-oxygen stable isotope, trace rare earth element, strontium isotope and cathodoluminescence). The evolution of geochemical characteristics reflects the change of the properties of a diagenetic medium and the geological background of a regional structure, and has important guiding significance for understanding the transformation of pores into rock events and pore-forming effects and predicting reservoir distribution.

Based on the carbonate diagenetic mineral type and/or the correspondence between diagenetic environment and geochemical characteristics and/or the relationship between carbonate diagenetic mineral type-diagenetic environment and absolute age under an absolute age coordinate system, which are established by the carbonate diagenetic environment evolution history recovery method, pore transformation analysis can be performed, and basis is provided for reservoir distribution prediction.

The technical scheme provided by the invention establishes the corresponding relation between the carbonate diagenetic mineral type and/or diagenetic environment and geochemical characteristics, and recovers the evolution history of the carbonate diagenetic environment; the method provides basis for understanding pore transformation events and pore-forming effects under control of regional structure geological background and predicting regional reservoir distribution, and promotes development of old carbonate diagenetic chronology subjects.

Drawings

Fig. 1 is a flowchart of a method for recovering evolution history of a carbonate rock formation environment in example 1.

FIG. 2A is a graph of the characteristics and diagenetic sequence of sample Q-56-1 from the Qdullness group dolomite reservoir in the Ackersu region of example 1.

FIG. 2B is a graph of the characteristics and diagenetic sequence of sample Q-56-1 from the Qdullness group dolomite reservoir in the Ackersu region of example 1.

FIG. 3A is a graph of the characterization and diagenetic sequence of sample Q-58-1-1 from the Dolomite reservoir of the Qdulled series in the Ackesu region of example 1.

FIG. 3B is a graph of the characterization and diagenetic sequence of sample Q-58-1-1 from the Dolomite reservoir of the Qdulled group in the Ackesu region of example 1.

FIG. 4 is a graph of the characterization and diagenetic sequence of sample Q-58-1-2 from the sweet-line Chemicals group Bituminous reservoir in the Ackersu region of example 1.

Fig. 5A is a characteristic and diagenetic sequence diagram of the example 1, in the acksu region, jordan series, of dolomite reservoir sample Q-76-1.

Fig. 5B is a characteristic and diagenetic sequence diagram of the example 1, the acksu regional jordan series dolomite reservoir sample Q-76-1.

FIG. 6A is a graph of the characteristics and diagenetic sequence of sample Q-151-1 from the Qdullness group dolomite reservoir in the Ackersu region of example 1.

FIG. 6B is a graph of the characteristics and diagenetic sequence of sample Q-151-1 from the Qdullness group dolomite reservoir in the Ackersu region of example 1.

FIG. 7 is an in situ U-Pb isotope annual plot of a sample Q-56-1 carbonate diagenetic mineral from a sweet-line Chemicals set of Siegesbeck reservoirs in the Ackersu region of example 1.

FIG. 8 is an in situ U-Pb isotope annual survey of a sample Q-58-1-1 carbonate diagenetic mineral from a sweet-line Chemicals Siegesbeck group dolomite reservoir in the Ackersu region of example 1.

Fig. 9A is an in situ laser U-Pb isotope annual survey of dolomite surrounding rock in example 1, sample Q-58-1-2 of the sweet-series geocerite reservoir in the acksu region.

FIG. 9B is an in situ U-Pb isotope annual survey of a sample Q-58-1-2 carbonate diagenetic mineral from a sweet-line Chemicals Siegesbeck group dolomite reservoir in the Ackersu region of example 1.

FIG. 9C is an in situ U-Pb isotope annual survey of a sample Q-58-1-2 carbonate diagenetic mineral from a sweet-line Chemicals Siegesbeck group dolomite reservoir in the Ackersu region of example 1.

Fig. 10A is an in situ U-Pb isotope annual survey of a laser in situ for dolomite surrounding rock, sample Q-76-1 of a reservoir of a sweet-wire series geoceric group in the region of acksu in example 1.

Fig. 10B is an in situ U-Pb isotope annual survey of a sample Q-76-1 carbonate diagenetic mineral from a sweet-line series of pezite reservoirs in the region of acksu in example 1.

FIG. 10C is an in situ U-Pb isotope annual plot of a sample Q-76-1 carbonate diagenetic mineral from a sweet-line Chemicals set of Siegesbeck reservoirs in the Ackersu region of example 1.

FIG. 11 is an in situ U-Pb isotope annual plot of a sample Q-151-1 carbonate diagenetic mineral from a sweet-line Chemicals Alaska group dolomite reservoir in the Ackersu region of example 1.

Fig. 12 is a graph of the change in geochemical characteristics of strontium isotopes and oxygen stable isotopes in the axsu region with different types of carbonate diagenetic minerals.

Fig. 13A is a graph of the change in the geochemical characteristics of micro-rare earth elements with different types of carbonate diagenetic minerals in the acksu region.

Fig. 13B is a graph of the change in the geochemical characteristics of micro-rare earth elements with different types of carbonate diagenetic minerals in the acksu region.

Fig. 14 is a graph of carbonate diagenetic mineral type-diagenetic environment versus absolute age (diagenetic mineral-diagenetic environment correspondence and transition map) in the absolute age coordinate system of the acksu region.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.

The embodiment of the invention provides a carbonate rock formation environment evolution history recovery method, which comprises the following steps:

Wherein the carbonate diagenetic mineral comprises carbonate cement and surrounding rock.

Wherein, the rock sample with hole development and hole filling with multi-stage (at least two-stage) carbonate cement and the characteristics of carbonate cement inter-cutting is easy to establish complete and reliable diagenetic sequence so as to determine the stage of carbonate diagenetic mineral in the rock sample; in particular, a complete and reliable diagenetic sequence may be established using conventional methods, such as establishing a complete and reliable diagenetic sequence based on the age, character, age, cross-relationship of carbonate cements in the rock sample, erosion age, age of eroded carbonate cements, and the like.

In a preferred embodiment, the determination of the period of carbonate diagenetic mineral and the type of carbonate diagenetic mineral of each period in the rock sample is performed using sample flakes made of the rock sample; further, the thickness of the sample sheet for specifying the period of the carbonate diagenetic mineral in the rock sample was 30.+ -.3. Mu.m.

In a preferred embodiment, isotope testing is performed using sample wafers made from rock samples; still further, the thickness of the sample sheet for performing isotope measurement years is 80-100 μm, for example, the thickness of the sample sheet for performing isotope measurement years is 100 μm.

In a preferred embodiment, the cluster isotope test is performed using a powder sample of each phase of subcarbonate diagenetic mineral made from a rock sample; further, the mass of the powder sample for performing the cluster isotope test is not less than 10mg.

In a preferred embodiment, the strontium isotope value analysis is performed using a powder sample of each phase of subcarbonate diagenetic mineral made from a rock sample; further, the mass of the powder sample for performing the strontium isotope value analysis is not less than 1mg.

In a preferred embodiment, the trace rare earth element analysis is performed using a sample wafer made of a rock sample; further, the thickness of the sample sheet for performing the micro rare earth element analysis is 80 to 100 μm, for example, the thickness of the sample sheet for performing the micro rare earth element analysis is 100 μm.

In a preferred embodiment, carbon-oxygen stable isotope analysis is performed using sample wafers made from rock samples; further, the thickness of the sample sheet for performing carbon-oxygen stable isotope analysis is 60 to 70 μm, for example, the thickness of the sample sheet for performing carbon-oxygen stable isotope analysis is 60 μm.

In a preferred embodiment, the cathodoluminescence analysis is performed using a sample wafer made of rock sample; further, the thickness of the sample sheet for performing the cathodoluminescence analysis was 30.+ -. 3. Mu.m.

In a preferred embodiment, the above method for recovering evolution history of carbonate rock formation environment includes:

Further, the thickness of the sample sheet A is 30+ -3 μm;

further, the thickness of the sample sheet B is 80-100 μm;

further, the thickness of the sample sheet C is 60-70 μm;

further, the diameter of the sample slice A is 1.5-2.5cm;

further, the diameter of the sample slice B is 1.5-2.5cm;

further, the diameter of the sample sheet C is 1.5-2.5cm;

Further, preparing at least 2 parallel samples corresponding to each rock sample for restoring the evolution history of the diagenetic environment, preparing a sample slice A, a sample slice B and a sample slice C of the rock sample for restoring the evolution history of the diagenetic environment by using the parallel samples, and reserving the residual parts of the parallel samples by the following steps: cutting each rock sample for restoring the evolution history of the diagenetic environment into cylinders with the diameter of 1.5-2.5cm and the thickness of 0.8cm, preparing 2 parallel samples along two sides of the section, preparing a sample sheet A and a sample sheet B from 1 parallel sample, preparing a sheet C from the other 1 parallel sample, and reserving the residual part of the parallel samples for later use;

further, the mirror image similarity of the sample slice A, the sample slice B and the sample slice C is high and is not lower than 90%;

further, the powder sample of each carbonate diagenetic mineral used for performing the cluster isotope test is not less than 10mg;

further, the powder sample of each carbonate diagenetic mineral for strontium isotope analysis is not less than 1mg.

In a preferred embodiment, the powder sample may be obtained using a micro-drill.

In a preferred embodiment, isotope dating may be performed in accordance with specifications and requirements of isotope dating techniques.

In a preferred embodiment, the trace rare earth element analysis may be performed using in situ trace rare earth element testing techniques.

In a preferred embodiment, the analysis of carbon-oxygen stable isotopes can be performed according to the specifications and requirements of carbon-oxygen stable isotope determination to obtain carbon-oxygen stable isotope values of carbonate diagenetic minerals of each period.

In a preferred embodiment, the cluster isotope test can perform temperature measurement according to the specification and requirements of a cluster isotope (delta 47) temperature measurement technology, and acquire the delta 47 temperature of carbonate diagenetic minerals in each period.

In a preferred embodiment, the strontium isotope analysis may perform testing work according to specifications and requirements of strontium isotope determination technology to obtain strontium isotope values of carbonate diagenetic minerals at each stage.

In a preferred embodiment, based on the type of the secondary carbonate diagenetic mineral, diagenetic environment and absolute age of each period, the relationship of carbonate diagenetic mineral type-diagenetic environment to absolute age in the absolute age coordinate system may be achieved by:

In a preferred embodiment, the isotope year is measured using a laser in situ U-Pb isotope year measurement method.

In a preferred embodiment, the acquiring a site burial history model includes:

acquiring a ground temperature gradient of a work area;

further, the correcting the preliminarily established mining area buried history model by utilizing the absolute age of each period of subcarbonate diagenetic mineral and the formation temperature of each period of subcarbonate diagenetic mineral and combining the mining area ground temperature gradient comprises the following steps:

In a preferred embodiment, the diagenetic environment includes a seawater diagenetic environment, an atmospheric fresh water diagenetic environment, and a buried diagenetic environment; the seawater diagenetic environment comprises a normal seawater diagenetic environment and an evaporated seawater diagenetic environment, and the atmospheric fresh water diagenetic environment comprises an early-table generation rock environment and a late-table generation rock environment.

In a preferred embodiment, the method further comprises:

based on the established relation between the carbonate diagenetic mineral type-diagenetic environment and absolute age under the absolute age coordinate system, the type of each stage of sub-carbonate diagenetic mineral and the geochemical analysis result of each stage of sub-carbonate diagenetic mineral, the corresponding relation between the carbonate diagenetic mineral type and/or diagenetic environment and the geochemical characteristics is established. In the preferred scheme, instead of establishing geochemical feature identification plates of different diagenetic environments, in fact, the geochemical features of the same diagenetic environment can also show great differences under different geological backgrounds, and it is impossible to establish a diagenetic environment geochemical feature identification plate with universal applicability; the preferred way is by absolute age of the diagenetic product and cluster isotope (delta ₄₇ ) And (3) the temperature constraint is used for establishing the relation between the carbonate diagenetic mineral type and diagenetic environment under an absolute age coordinate system and absolute age, and then establishing the evolution rule of the geochemical characteristic along with diagenetic environment transition through the test data of the geochemical characteristic (carbon-oxygen stable isotope, trace rare earth element, strontium isotope and cathodoluminescence). The evolution of geochemical characteristics reflects the change of the properties of a diagenetic medium and the geological background of a regional structure, and has important guiding significance for understanding the transformation of pores into rock events and pore-forming effects and predicting reservoir distribution.

Example 1

The embodiment provides a method for recovering evolution history of an ancient carbonate rock formation environment based on a fixed-year and fixed-temperature technology, which is used for carrying out diagenetic mineral-diagenetic environment-geochemical characteristics and evolution research on a Qidan group in a QiKesu area of Tarim under an absolute age coordinate system, and provides basis for understanding pore transformation events and pore-forming effects under control of regional structure geological background and predicting regional reservoir distribution, as shown in figure 1, and specifically comprises the following steps:

step S1: and obtaining a rock sample for restoring the evolution history of the diagenetic environment of the working area, wherein the characteristics of the rock sample for restoring the evolution history of the diagenetic environment comprise the development of holes, the filling of the holes with multi-stage (at least two stages) carbonate cements and the existence of carbonate cements to mutually intersect.

Step S2: preparing at least 2 parallel samples corresponding to each rock formation environment evolution history recovery rock sample aiming at the obtained rock formation environment evolution history recovery rock sample of the work area, preparing a sample sheet A, a sample sheet B and a sample sheet C of the rock formation environment evolution history recovery rock sample by using the parallel samples, and reserving the residual parts of the parallel samples;

specifically, each rock sample for recovering evolution history of diagenetic environment was cut into cylinders with a diameter of 1.5-2.5cm and a thickness of 0.8cm, 2 parallel samples were prepared along both sides of the cut surface, 1 of the parallel samples was prepared into sample sheet A (thickness 30 μm) and sample sheet B (thickness 100 μm), and the other 1 was prepared into sheet C (thickness 60 μm), and the remainder of the parallel samples was left for use.

Step S3: carrying out mirror image relationship consistency screening on a sample slice A, a sample slice B and a sample slice C of the rock sample for recovering the evolution history of each diagenetic environment;

specifically, using a microscope to observe mirror image relations of a sample slice A, a sample slice B and a sample slice C of each rock sample for recovering evolution history of the diagenetic environment, if the similarity of the mirror image relations of the sample slice A, the sample slice B and the sample slice C of a certain rock sample is not lower than 90%, reserving the sample, otherwise, rejecting the sample;

Mirror image correspondence research of the sheet A, the sheet B and the sheet C ensures consistency of carbonate diagenetic mineral periods for year measurement, temperature measurement and geochemical characteristic analysis, and one-to-one correspondence of various test data.

Step S4: observing the carbonate diagenetic mineral of the sample slice A, and determining the period of the carbonate diagenetic mineral and the types of the carbonate diagenetic mineral of each period in the rock sample;

specifically, sample sheet a was subjected to carbonate diagenetic mineral observation; the type, the characteristics and the period of the carbonate cement are mainly observed, the period of the corrosion action, the period of the corroded carbonate cement and the like are mainly observed, and a complete and reliable diagenetic sequence is established according to the relationship of the intersection, so that the period of the carbonate diagenetic mineral in the rock sample and the type of the carbonate diagenetic mineral in each period are clear;

the structure components of the Qdule Qigebuke group dolomite in the Ackesu area are as follows from early to late in sequence: (1) surrounding rock → (2) fibrous ring edge dolomite → (3) leaf-like dolomite → (4) fine powder granular dolomite → (5) granular dolomite → (6) hydrothermal dolomite and quartz (as shown in fig. 2A-6B).

Step S5: performing downhole observation on the parallel sample residual part corresponding to the rock sample for restoring the evolution history of the diagenetic environment, determining carbonate diagenetic minerals corresponding to the subcarbonate diagenetic minerals of each stage of a sample slice A of the rock sample, and drilling a powder sample (10 mg of each powder sample) by using a micro drill to obtain the cluster isotope temperature of the subcarbonate diagenetic minerals of each stage by performing a cluster isotope (delta 47) test;

The cluster isotope (delta 47 temperature) test is carried out according to the specification and the requirement of the carbonate mineral cluster isotope (delta 47) temperature measurement technology.

Step S6: in a sample sheet B corresponding to a rock sample for restoring the evolution history of the diagenetic environment, delineating carbonate cement of each stage corresponding to carbonate cement of each stage in the sample sheet A, and carrying out laser in-situ U-Pb isotope annual survey to obtain absolute age of carbonate cement of each stage; the results are shown in FIGS. 7-11, table 1;

the laser in-situ U-Pb isotope annual measurement is carried out according to the specification and the requirements of the carbonate mineral laser in-situ U-Pb isotope annual measurement technology.

Step S7: geochemical analysis is carried out on the subcarbonate rock of each period to obtain geochemical analysis results of the subcarbonate diagenetic mineral of each period:

step S71: strontium isotope assay using the parallel residue:

determining carbonate diagenetic minerals corresponding to the sub-carbonate diagenetic minerals of each period of a sample sheet A of the rock sample in the parallel sample residual parts corresponding to the rock sample for restoring the diagenetic environmental evolution history, and drilling a powder sample (1 mg of each powder sample) by using a micro drill for measuring strontium isotopes to obtain the strontium isotope values of the sub-carbonate diagenetic minerals of each period;

The strontium isotope determination is carried out according to the specification and the requirement of the strontium isotope determination technology; the results are shown in Table 1 and FIG. 12;

step S72: trace rare earth element determination was performed using sample sheet B:

performing surface polishing after laser in-situ U-Pb isotope measurement is completed by using a sample sheet B corresponding to a rock sample for recovering the evolution history of the diagenetic environment; in the sample slice B after surface polishing, defining carbonate diagenetic minerals corresponding to the sub-carbonate diagenetic minerals in each stage in the sample slice A of the rock sample, and determining the laser in-situ trace rare earth elements;

in the step, the trace rare earth element content measurement is carried out according to the specification and the requirement of a laser in-situ trace rare earth element measurement technology; obtaining a main trace rare earth element content change chart (fig. 13A and 13B) of the secondary carbonate diagenetic mineral in each period;

step S73: carbon oxygen stable isotope assay using sample sheet C:

in a sample sheet C corresponding to a rock sample for recovering the evolution history of a diagenetic environment, defining carbonate diagenetic minerals corresponding to the sub-carbonate diagenetic minerals of each stage in the sample sheet A of the rock sample, and obtaining carbon-oxygen stable isotope values of the sub-carbonate diagenetic minerals of each stage by carbon-oxygen stable isotope measurement;

The carbon-oxygen stable isotope determination is carried out according to the specification and the requirement of the carbon-oxygen stable isotope determination technology; the results are shown in Table 1 and FIG. 12;

step S74: cathodoluminescence analysis was performed using sample sheet a:

the cathodoluminescence analysis test is carried out according to the specification and the requirement of the cathodoluminescence analysis test technology; the results are shown in FIG. 14 and Table 1;

TABLE 1

Step S8: establishing a reliable burial history model;

step S81: initially establishing a buried history model of a work area and acquiring the ground temperature gradient of the work area;

step S82: correcting a work area burial history model:

correcting the preliminarily established working area buried history model by utilizing the absolute age of each period of subcarbonate diagenetic mineral and the formation temperature of each period of subcarbonate diagenetic mineral and combining the working area ground temperature gradient, and acquiring the working area corrected buried history model as the working area buried history model for acquiring the buried depth of each period of subcarbonate diagenetic mineral by combining the absolute age of each period of subcarbonate diagenetic mineral:

(1) The absolute age of each period of subcarbonate diagenetic mineral is added to a buried history model to obtain the first buried depth of each period of subcarbonate diagenetic mineral, and the formation temperature of each period of subcarbonate diagenetic mineral is calculated to obtain the second buried depth of each period of subcarbonate diagenetic mineral according to the ground temperature gradient;

(2) If the first and second depths of burial of each stage of subcarbonate cement are inconsistent, the burial history curve is unreliable, and the burial history curve is modified so that the first and second depths of each stage of subcarbonate cement are consistent, thereby obtaining a corrected burial history curve for the work area;

(3) If the first and second depths of burial of each stage of subcarbonate cement are consistent, the absolute age of each stage of subcarbonate cement and the formation temperature of each stage of subcarbonate cement are considered to form a mutual evidence relationship, the burial history curve is reliable, and the burial history curve is used as a work area corrected burial curve model;

the temperature gradient of the early-ocean Tao Shi ground in Ackesu district is 3.2-3.5 ℃/100m, the temperature gradient of the late-clay ground is 3.0 ℃/100m, the temperature gradient of the carbolic-binary ground is 3.0-3.2 ℃/100m, the temperature gradient of the late-chalk ground is 2.5 ℃/100m, and the temperature gradient of the new generation ground is 2.0 ℃/100m. Through continuous correction of the absolute age of the U-Pb isotope and the cluster isotope (Δ47) temperature, a geotric curve and burial Shi Quxian (shown in fig. 14) of the jordan series of grignard in the aksu region was established.

Step S9: determination of the diagenetic environment of the subcarbonate diagenetic minerals at each stage:

step S91: determining the burial depth by combining the burial history model:

step S92: determining the diagenetic environment by combining absolute age, formation temperature, burial depth and geochemical analysis results:

specifically: (1) dolomite surrounding rock (results are shown in table 1): the mineral component is mud powder crystal dolomite; absolute age 565Ma, comparable to or slightly later than formation age, represents formation age or early age of dolomite; delta ₄₇ The temperature is 56-58 ℃, is slightly higher than the surface temperature, and is related to drought evaporation background; the strontium isotope is equivalent to the contemporaneous seawater, the oxygen stable isotope has low negative value, the carbon stable isotope has low positive value, and the strontium isotope is equivalent to the contemporaneous seawater The phase seawater diagenetic environment is related to the product of the evaporation seawater environment, namely the dolomite and petrochemical product; the cathode emits light in dim state;

(2) Fibrous cyclic dolomite (results are shown in table 1): exposing the top of the Qigebuke group to cause the sediment to be leached by the early-stage surface atmospheric fresh water to form corrosion holes, wherein the peripheries of the holes are filled with fibrous annular calcite, and the fibrous annular calcite is subjected to early-stage dolomite petrochemical by the alternate seawater evaporation environment; absolute age ± 555Ma, slightly younger than surrounding rock, representing early age of dolomite; delta ₄₇ The temperature is 60-63 ℃, is slightly higher than that of surrounding rock, and is related to alternate evaporation of seawater in drought climate background; the burial depth is less than 100m; the strontium isotope, the carbon-oxygen stable isotope and the surrounding rock are close to each other, and all reflect alternation of exposure corrosion and evaporation seawater diagenetic environment before burying; the cathode emits light in dim-orange color;

(3) Leaf-shaped dolomite (results are shown in table 1): is considered a product of a seawater diagenetic environment; absolute age of + -542 Ma, delta ₄₇ The temperature is 65-68 ℃, the corresponding burial depth is about 300m, the temperature is possibly still influenced by the contemporaneously evaporated seawater, the age is slightly young compared with the fibrous ring edge dolomite, the temperature is possibly represented by the age of dolomite, and the temperature is slightly increased and is related to the increase of the burial depth; the strontium isotope has little change compared with the contemporaneous seawater, which indicates that the strontium isotope is not separated from the seawater diagenetic environment; the oxygen isotope shifts to a slightly negative value due to the temperature rise, and the carbon isotope has a low positive value and has a small relationship with the temperature; the cathode emits light in dim state;

(4) Finely particulate granular dolomite (results shown in table 1): absolute age of +486 Ma, delta ₄₇ The temperature is 90 ℃, and the corresponding depth is 1200m; compared with the bladed dolomite, the strontium isotope is larger than the synchronous seawater value, which indicates that the influence of seawater and atmospheric fresh water is eliminated, and deep stratum brine leads to the enrichment of strontium; the oxygen isotope is further biased and is responsive to the increase of the burial depth and the temperature rise, and the carbon isotope is related to the decomposition of organic matters and has little relation with the temperature, so that the change of the oxygen isotope is little along with the increase of the burial depth; non-light-dim light is formed under the cathode light;

(5) White of medium crystal grain shapeMarble (results are shown in table 1): absolute age ± 472Ma, delta ₄₇ The temperature is 110 ℃, and the corresponding depth is 1800m; compared with the fine-powder granular dolomite, the strontium isotope is further enriched, the oxygen isotope is further biased negative, and the response of further increasing the burial depth and the temperature is achieved; non-light-dim light is formed under the cathode light;

(6) Saddle dolomite (results are shown in table 1): there are two causative types of saddle dolomite: first, hydrothermal dolomite (hydrothermal dolomite), associated with veil source materials, giant crystals and curved crystal planes, typically wavelike extinction, forms temperatures significantly above formation temperatures; secondly, geothermal dolomite (geothermal dolomite), which is related to a medium with a depth of Wen Chengyan, is mainly coarse crystals, atypical curved crystal faces and wavy extinction, and has a formation temperature which is equal to or slightly higher than the formation temperature; the absolute age of the saddle dolomite is + -215 Ma, delta ₄₇ The temperature is 160 ℃, the corresponding depth is 3500m, and the geothermal dolomite is needed; compared with the middle-grain dolomite, the strontium isotope is further enriched, the oxygen isotope is further biased negative, and the response of the deep high Wen Chengyan environment is achieved; the cathode emits orange light.

Step S10: based on the types, diagenetic environments and absolute ages of the carbonate diagenetic minerals in each period, establishing a relation between the carbonate diagenetic mineral types-diagenetic environments and absolute ages in an absolute age coordinate system (diagenetic mineral-diagenetic environment corresponding relation and transition diagrams in the absolute age coordinate system);

specifically: adding the carbonate diagenetic mineral of each period into a buried history model according to the absolute age, and specifically establishing the type of the carbonate diagenetic mineral of each period and the change curve of diagenetic environment along with absolute age as a relation diagram of carbonate diagenetic mineral type-diagenetic environment and absolute age under an absolute age coordinate system; the results are shown in FIG. 14.

Based on the corresponding relation between the carbonate diagenetic mineral type and the geochemical characteristic and the relation between the carbonate diagenetic mineral type-diagenetic environment and the absolute age under the absolute age coordinate system, which are established by the carbonate diagenetic environment evolution history recovery method, main diagenetic event and pore transformation analysis are carried out, and a basis is provided for reservoir distribution prediction. The middle and top two sets of reservoirs developed by the Qigebuk group, the middle laminated rock dolomite reservoir is mainly filled with fine-grain granular dolomite and medium-grain granular dolomite by primary pores, the top foamed sponge layer rock dolomite reservoir is also developed with erosion pores besides the primary pores and is filled with fiber-shaped ring edge dolomite, leaf-shaped dolomite, fine-grain granular dolomite, medium-grain-shaped dolomite and saddle-shaped dolomite, and the transition research of diagenetic mineral-diagenetic environment-geochemical characteristics under an absolute age coordinate system reveals that a reservoir space is mainly formed in a deposition and early-surface environment, and the buried environment is a process of gradually reducing pores through cementing (the result is shown in table 2).

TABLE 2

The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.

Claims

1. A method for recovering evolution history of a carbonate diagenetic environment, wherein the method comprises the following steps:

acquiring a rock sample for restoring the evolution history of the diagenetic environment of a working area, wherein the rock sample for restoring the evolution history of the diagenetic environment comprises the characteristics of pore development, filling of pores with a plurality of carbonate cements and the existence of carbonate cement interchange;

preparing at least 2 parallel samples corresponding to each rock sample aiming at the obtained rock sample for recovering the evolution history of each rock formation environment, preparing a sample sheet A, a sample sheet B and a sample sheet C of the rock sample for recovering the evolution history of each rock formation environment by using the parallel samples, and reserving the residual parts of the parallel samples; the thickness of the sample slice A is 30+/-3 mu m, the thickness of the sample slice B is 80-100 mu m, and the thickness of the sample slice C is 60-70 mu m;

determining powder samples of carbonate diagenetic minerals corresponding to the sub-carbonate diagenetic minerals of each stage of a sample sheet A of the rock sample in the parallel sample residual parts corresponding to the rock samples for restoring diagenetic environmental evolution history, and performing cluster isotope testing to obtain cluster isotope temperatures of the sub-carbonate diagenetic minerals of each stage; the mass of the powder sample for performing the cluster isotope test is not less than 10mg;

determining a powder sample of carbonate diagenetic mineral corresponding to the sub-carbonate diagenetic mineral of each period of a sample sheet A of the rock sample in the parallel sample residual part corresponding to the rock sample for restoring the diagenetic environmental evolution history, and performing strontium isotope analysis to obtain a strontium isotope analysis result of the sub-carbonate diagenetic mineral of each period; the mass of the powder sample for performing the strontium isotope value analysis is not less than 1mg;

Based on the types, the diagenetic environments and the absolute ages of the sub-carbonate diagenetic minerals in each period, establishing a relation between the carbonate diagenetic mineral types, the diagenetic environments and the absolute ages under an absolute age coordinate system;

wherein the obtaining the work area buried history model comprises: based on regional geological background, drilling and seismic data, initially establishing a work area buried history model; acquiring a ground temperature gradient of a work area; correcting the preliminarily established mining area buried history model by utilizing the absolute age of each period of subcarbonate diagenetic mineral and the formation temperature of each period of subcarbonate diagenetic mineral and combining the mining area ground temperature gradient; acquiring a work area corrected buried history model as the work area buried history model for acquiring the buried depth of each period of subcarbonate diagenetic mineral in combination with the absolute age of each period of subcarbonate diagenetic mineral;

the correction of the preliminarily established mining area buried history model by utilizing the absolute age of each period of subcarbonate diagenetic mineral and the formation temperature of each period of subcarbonate diagenetic mineral and combining the mining area ground temperature gradient comprises the following steps: the absolute age of each period of subcarbonate diagenetic mineral is added to a buried history model to obtain the first buried depth of each period of subcarbonate diagenetic mineral, and the formation temperature of each period of subcarbonate diagenetic mineral is calculated to obtain the second buried depth of each period of subcarbonate diagenetic mineral according to the ground temperature gradient; if the first and second depths of burial of each stage of subcarbonate cement are inconsistent, the burial history curve is unreliable, and the burial history curve is modified so that the first and second depths of each stage of subcarbonate cement are consistent, thereby obtaining a corrected burial history curve for the work area; if the first and second depths of burial of each stage of subcarbonate cement are consistent, the absolute age of each stage of subcarbonate cement and the formation temperature of each stage of subcarbonate cement are considered to form a mutual evidence relationship, the burial history curve is reliable, and the burial history curve is used as a work area corrected burial curve model;

Wherein the diagenetic environment comprises a seawater diagenetic environment, an atmospheric fresh water diagenetic environment and a buried diagenetic environment; the seawater diagenetic environment comprises a normal seawater diagenetic environment and an evaporated seawater diagenetic environment, and the atmospheric fresh water diagenetic environment comprises an early-table generation rock environment and a late-table generation rock environment.

2. The method of claim 1, wherein,

the diameter of the sample slice A is 1.5-2.5cm;

the diameter of the sample slice B is 1.5-2.5cm;

the diameter of the sample sheet C is 1.5-2.5cm.

3. The method according to claim 1, wherein the preparing of at least 2 parallel samples corresponding to each rock sample for restoring the evolution history of the diagenetic environment, using the parallel samples, the preparing of sample slice a, sample slice B, sample slice C, and the retaining of the residual parallel samples is performed by: cutting each rock sample for restoring the evolution history of the diagenetic environment into cylinders with the diameter of 1.5-2.5cm and the thickness of 0.8cm, preparing 2 parallel samples along two sides of the section, preparing a sample sheet A and a sample sheet B from 1 parallel sample, preparing a sheet C from the other 1 parallel sample, and reserving the residual part of the parallel samples for later use.

4. The method of claim 1, wherein sample slice a, sample slice B, sample slice C mirror image similarity is no less than 90%.

5. The method of claim 1, wherein the isotope dating is performed using a laser in-situ U-Pb isotope dating approach.

6. The method of claim 1, wherein the method further comprises:

based on the established relation between the carbonate diagenetic mineral type-diagenetic environment and absolute age under the absolute age coordinate system, the type of each stage of sub-carbonate diagenetic mineral and the geochemical analysis result of each stage of sub-carbonate diagenetic mineral, the corresponding relation between the carbonate diagenetic mineral type and/or diagenetic environment and the geochemical characteristics is established.

7. The method of claim 1, wherein the relationship of carbonate diagenetic mineral type-diagenetic environment to absolute age established under an absolute age coordinate system based on the type of sub-carbonate diagenetic mineral, diagenetic environment, and absolute age of each stage is achieved by: