CN112580918A - Method and device for tracing oil and gas migration and path of hydrocarbon source rock and storage medium - Google Patents
Method and device for tracing oil and gas migration and path of hydrocarbon source rock and storage medium Download PDFInfo
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Abstract
The invention discloses a hydrocarbon source rock oil-gas migration and path tracing method, a hydrocarbon source rock oil-gas migration and path tracing device and a storage medium. The heterogeneity evaluation is carried out on the hydrocarbon source rocks according to the macroscopic characteristics and the microscopic indexes, the types of crude oil generated by the hydrocarbon source rocks are finely divided based on the results of the heterogeneity evaluation, and the oil sources are compared, so that the sources and the spatial distribution of different crude oil types can be determined. And carrying out oil and gas migration and path tracing on crude oil from the same source based on the spatial distribution. The method aims at the heterogeneous development characteristics of the source rocks, finely evaluates the heterogeneity of the source rocks, and improves the accuracy and effectiveness of oil source comparison, oil and gas migration direction analysis and path tracing. A set of complete technical processes of hydrocarbon source rock heterogeneous evaluation, crude oil fine classification and oil source analysis, migration direction and path tracing are formed, and the method has important significance for exploration and development and potential excavation synergy of old oil areas.
Description
Technical Field
The invention relates to the technical field of oil-gas exploration, in particular to a hydrocarbon source rock oil-gas migration and path tracing method, a hydrocarbon source rock oil-gas migration and path tracing device and a storage medium.
Background
The existing oil and gas migration is a crucial link in the comprehensive research of petroleum geology, and the correct analysis of the petroleum migration direction has important significance for trap prediction and exploration and development of oil fields. At present, the research of oil and gas migration is developed towards diversification from the aspects of early qualitative experiments, mechanism understanding and oil-source comparison in organic geochemistry, wherein the oil and gas migration geochemical tracing technology is widely used for tracing the oil and gas migration direction and path due to the representativeness, diversity and data persuasion of the geochemical analysis and assay based on crude oil samples. At present, the organic geochemical research for tracing petroleum migration is based on the analysis of tracing indexes with trend change, and the system summarizes and analyzes the existing organic geochemical indexes and application methods (saturated hydrocarbon, aromatic hydrocarbon, nitrogen-containing compound and oxygen-containing heterocyclic aromatic hydrocarbon compound) for tracing oil and gas migration, such as a nitrogen-containing compound analysis technology, a biomarker and migration-related geochemical parameters and the like.
For areas with complex and strong heterogeneity of source rocks, the types of crude oil are various and the comparison of oil sources is difficult, and if the heterogeneity development characteristics of the source rocks in the bed series are not analyzed clearly, the fine division of the types of the crude oil, the comparison of the oil sources and the analysis of the subsequent oil-gas migration direction can be influenced. Therefore, for the crude oil pits (depressions) with strong heterogeneous development of the source rock, the heterogeneous evaluation of the source rock from macro to micro is very important, and the method is an important basis for the fine classification of crude oil and the comparison of oil sources. Aiming at crude oil pits with strong heterogeneous development of source rocks, how to establish a set of detailed technical flow of hydrocarbon source rock heterogeneous evaluation, crude oil fine classification and oil source analysis, migration direction and path tracing and effectively combine the hydrocarbon source rock heterogeneous evaluation with the oil gas migration direction and path analysis has important significance for exploration and development and excavation synergy of old oil areas.
Disclosure of Invention
In order to solve the technical problems, the invention provides a hydrocarbon source rock oil-gas migration and path tracing method, a hydrocarbon source rock oil-gas migration and path tracing device, a storage medium and computer equipment.
In a first aspect of the invention, there is provided a source rock hydrocarbon migration and path tracing method comprising:
carrying out heterogeneity evaluation on the hydrocarbon source rock according to the macroscopic characteristics and the microscopic indexes;
based on the heterogeneity evaluation result, finely dividing the crude oil types generated by the hydrocarbon source rocks and comparing the oil sources to determine the sources and spatial distribution of different crude oil types;
and carrying out oil and gas migration and path tracing on crude oil from the same source based on the spatial distribution.
Preferably, the source rock is an effective source rock development interval.
Preferably, the effective hydrocarbon source rock development interval is determined by the following steps: and determining the hydrocarbon source rock layer section with better hydrocarbon generation potential as an effective hydrocarbon source rock development layer section according to the development condition and/or the development type of the organic matter of the hydrocarbon source rock.
Preferably, the macroscopic features include at least one of: the development thickness characteristic, the phase zone characteristic, the electrical characteristic and the organic matter abundance characteristic of the hydrocarbon source rock.
Preferably, the microscopic indicator comprises a parameter of a molecular biomarker associated with migration.
Preferably, the oil and gas migration and path tracing is performed on crude oil from the same source based on the spatial distribution, including: and carrying out oil and gas migration and path tracing on crude oil from the same source by using the parameters of the molecular biomarkers related to migration based on the spatial distribution.
Preferably, after determining the sources and spatial distributions of the different crude oil types, the method further comprises:
and presenting the crude oil types from the same source on the same plan view, and marking the strata of the crude oil types in the spatial distribution.
Preferably, the molecular markers include at least the following species: galaraffins, stanols and hopane.
In a second aspect of the invention, there is provided a source rock hydrocarbon migration and path tracing apparatus comprising:
the evaluation module is used for carrying out heterogeneity evaluation on the hydrocarbon source rock according to the macroscopic characteristics and the microscopic indexes;
the partitioning module is used for finely partitioning the crude oil types generated by the hydrocarbon source rocks and comparing the oil sources based on the heterogeneity evaluation result so as to determine the sources and the spatial distribution of different crude oil types;
and the tracing module is used for carrying out oil and gas migration and path tracing on crude oil from the same source.
In a third aspect of the present invention, a storage medium is provided, in which a computer program is stored, which when executed by a processor is capable of implementing the above-mentioned hydrocarbon source rock hydrocarbon migration and path tracing method.
In a fourth aspect of the present invention, there is provided a computer device comprising: a processor and a storage medium having stored thereon a computer program which, when executed by the processor, is capable of implementing the source rock hydrocarbon migration and path tracing method of any one of claims 1 to 8.
Compared with the prior art, one or more embodiments in the above scheme can have the following advantages or beneficial effects:
by applying the hydrocarbon source rock oil-gas migration and path tracing method, the heterogeneity characteristics of the hydrocarbon source rock can be determined by performing heterogeneity evaluation on the hydrocarbon source rock according to macroscopic characteristics and microscopic indexes, the types of crude oil generated by the hydrocarbon source rock are finely divided based on the results of the heterogeneity evaluation, and oil source comparison is performed, so that the sources and spatial distribution of different crude oil types can be determined. And carrying out oil and gas migration and path tracing on crude oil from the same source based on the spatial distribution. The method aims at the heterogeneous development characteristics of the source rocks, finely evaluates the heterogeneity of the source rocks, and improves the accuracy and effectiveness of oil source comparison, oil and gas migration direction analysis and path tracing. A set of complete technical processes of hydrocarbon source rock heterogeneous evaluation, crude oil fine classification and oil source analysis, migration direction and path tracing are formed, and the method has important significance for exploration and development and potential excavation synergy of old oil areas.
Drawings
The scope of the present disclosure may be better understood by reading the following detailed description of exemplary embodiments in conjunction with the accompanying drawings. Wherein the included drawings are:
fig. 1 shows a schematic flow chart of a hydrocarbon source rock hydrocarbon migration and path tracing method provided by an embodiment of the application.
Fig. 2 shows lithologic electrical profiles and sterane and terpenane distribution characteristics of a sand-four upper-stage source rock provided by the specific example of the application.
Fig. 3 shows a frequency graph of organic matter abundance of pure upper and lower segments of source rock in a newton region according to a specific example of the present application.
Fig. 4 shows a graph of the stanol and terpenane profiles of five crude oil types, bovine pooled, provided by the specific examples of the present application.
FIG. 5 illustrates a high gamma-paraffin crude oil distribution and sterane maturity value distribution profile provided by a specific example of the present application.
Fig. 6 shows a schematic diagram of medium and high gamma-paraffins crude oil distribution, sterane maturity value distribution, and migration direction provided by the specific example of the present application.
FIG. 7 illustrates a cross-sectional view of the bovine depressed face 138-king 79 hydrocarbon migration provided by a specific example of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the following will describe in detail an implementation method of the present invention with reference to the accompanying drawings and embodiments, so that how to apply technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented.
In the prior art, in areas with complex and strong heterogeneity of source rocks, the types of crude oil are various and the comparison of oil sources is difficult, and if the heterogeneity development characteristics of the source rocks in a bed series are not analyzed clearly, the fine division of the types of the crude oil, the comparison of the oil sources and the analysis of the subsequent oil-gas migration direction can be influenced. Therefore, for the crude oil pits (depressions) with strong heterogeneous development of the source rock, the heterogeneous evaluation of the source rock from macro to micro is very important, and the method is an important basis for the fine classification of crude oil and the comparison of oil sources. Aiming at crude oil pits with strong heterogeneous development of source rocks, how to establish a set of detailed technical flow of hydrocarbon source rock heterogeneous evaluation, crude oil fine classification and oil source analysis, migration direction and path tracing and effectively combine the hydrocarbon source rock heterogeneous evaluation with the oil gas migration direction and path analysis has important significance for exploration and development and excavation synergy of old oil areas.
Based on the method, the heterogeneity characteristics of the hydrocarbon source rocks can be determined by conducting heterogeneity evaluation on the hydrocarbon source rocks according to macroscopic characteristics and microscopic indexes, crude oil types generated by the hydrocarbon source rocks are finely divided based on the results of the heterogeneity evaluation, and oil source comparison is conducted, so that the sources and spatial distribution of different crude oil types can be determined. And carrying out oil and gas migration and path tracing on crude oil from the same source based on the spatial distribution. The method aims at the heterogeneous development characteristics of the source rocks, finely evaluates the heterogeneity of the source rocks, and improves the accuracy and effectiveness of oil source comparison, oil and gas migration direction analysis and path tracing.
Referring to fig. 1, fig. 1 is a schematic flow chart of a hydrocarbon source rock hydrocarbon migration and path tracing method provided in an embodiment of the present application, which includes steps S101 to S103.
In step S101, heterogeneity of the source rock is evaluated based on the macroscopic characteristics and the microscopic indexes.
Wherein the source rock may be an active source rock development interval. The step may specifically be: selecting a target oil field to be researched, and determining an effective hydrocarbon source rock development layer section of the oil-producing depression (hollow) through hydrocarbon production potential evaluation, wherein whether a certain layer section of the oil-producing depression is effective hydrocarbon source rock can be determined according to the development condition, the development type and the like of organic matters of the hydrocarbon source rock. The function is to determine whether the hydrocarbon source rock in the interval has hydrocarbon generation potential and is a hydrocarbon supply rock layer of oil and gas. The hydrocarbon source rock heterogeneity evaluation specifically relates to a spatial distribution rule of effective hydrocarbon source rock macroscopic characteristics and microscopic indexes, and the spatial distribution rule comprises development thicknesses, spatial distribution rules, electrical characteristics, hydrocarbon source rock organic matter abundance distribution, microscopic molecular biomarkers and other performance characteristics of different layers of hydrocarbon source rocks, so that the obvious heterogeneity characteristics of the same layer of hydrocarbon source rocks in the space due to different hydrocarbon-generating parent substances and different deposition environments are determined, and the method is important for fine classification of the types of the following crude oils.
In step S102, based on the results of the heterogeneity evaluation, the types of crude oil generated by the hydrocarbon source rock are finely divided and compared with each other to determine the sources and spatial distributions of different crude oil types.
The step can be specifically that based on the fine heterogeneity evaluation result of the hydrocarbon source rock, the types of crude oil are finely divided according to the heterogeneity characteristics shown by the molecular biomarker characteristics of the hydrocarbon source rock, the sources and the spatial distribution of different types of crude oil are determined through oil source comparison, and the oil-gas distribution of the set of hydrocarbon source rock can be determined through the layer series of the crude oil distributed on the space of the different types and the different sources. As an example, after determining the sources and spatial distributions of different crude oil types, the same crude oil sources can be presented on the same plan by software, and the production horizon can be marked with different colors for comparison and observation.
In step S103, oil and gas migration and path tracing are performed on crude oil from the same source based on the spatial distribution.
As a preferred example, when tracing the oil and gas migration direction and path, migration analysis and tracing are performed on homologous synchronous crude oil, and the oil and gas migration direction and path are respectively traced for different finely divided crude oil types from different sources by using a molecular biomarker related to migration as a microscopic index. As an example, a typical oil reservoir profile of a target oil field can be selected, molecular biomarkers are used as microscopic indexes to study the position relation between a reservoir and a hydrocarbon source rock and the distribution rule of crude oil on the space, and the formation rule of different types of crude oil is analyzed by combining the geological characteristics of the crude oil, so that the next exploration and deployment service is provided.
According to the hydrocarbon source rock oil-gas migration and path tracing method provided by the embodiment of the application, the heterogeneity characteristics of the hydrocarbon source rock can be determined by conducting heterogeneity evaluation on the hydrocarbon source rock according to macroscopic characteristics and microscopic indexes, the types of crude oil generated by the hydrocarbon source rock are finely divided based on the results of the heterogeneity evaluation, and oil source comparison is conducted, so that the sources and spatial distribution of different crude oil types can be determined. And carrying out oil and gas migration and path tracing on crude oil from the same source based on the spatial distribution. The method aims at the heterogeneous development characteristics of the source rocks, finely evaluates the heterogeneity of the source rocks, and improves the accuracy and effectiveness of oil source comparison, oil and gas migration direction analysis and path tracing. A set of complete technical processes of hydrocarbon source rock heterogeneous evaluation, crude oil fine classification and oil source analysis, migration direction and path tracing are formed, and the method has important significance for exploration and development and potential excavation synergy of old oil areas.
The hydrocarbon source rock hydrocarbon migration and path tracing methods provided herein are described below with reference to specific examples.
Specific examples
(1) And (4) evaluating the heterogeneity of the hydrocarbon source rock according to the macroscopic characteristics and the microscopic indexes.
Exploration practices prove that the depressed areas of the Bozhuang mainly develop three sets of hydrocarbon source rocks including sand four above, sand three below and sand three below, wherein the sand four above and the sand three below develop organic matter enrichment layers, the organic matter is rich, the type is good, the hydrocarbon generation potential is huge, and the hydrocarbon source rocks are high-quality hydrocarbon source rocks; sand III is a set of common source rocks. Because the hydrocarbon source rock at the upper sand section has great contribution to oil and gas reservoir formation, the hydrocarbon source rock heterogeneity analysis is performed by taking the hydrocarbon source rock at Es4 as an example, and the hydrocarbon source rock heterogeneity evaluation of the sand section is not described.
1) Heterogeneity of source rock in the upper sand four and its biomarker characteristics
According to the sequence stratigraphic analysis, the upper section of the sand four is divided into a pure upper section and a pure lower section, and lithological combination and biomarker compound characteristics of the sand four have obvious heterogeneity in space. Phase bands and thickness variation: the pure downward gyre mainly takes the descending period development of the short-term gyre as the main point, the water body of the lake basin is shallow, most areas are shoreline lake zones, and deep-lying areas are deep lakes-half deep lake phases. The thickness of the pure upper section stratum is relatively large, can reach 175m at most, is generally nearly one hundred meters thick, and shows the characteristic of being thick in the east and thin in the west. The pure upward gyrus mainly takes the gyrus ascending period development of the reference surface as the main part and shows the characteristics of lake invasion, a deep lake-semi-deep lake phase is formed in most areas, and a slope zone is a shallow lake phase. The pure lower stratum is relatively stable transversely, and the thickness is about tens of meters generally. Secondly, the electrical characteristic is strong heterogeneity in the longitudinal direction of the lithology, the characteristic is obvious, the electrical resistivity of the pure upper section is expressed in a sharp knife shape with high amplitude and abnormity corresponding to the lithology characteristic. The pure lower resistivity curve is comb-shaped (left figure of fig. 2). ③ abundance of organic matter: the abundance of organic matters at the upper and lower pure sections also shows strong heterogeneity, and the organic carbon frequency statistics of the upper pure section hydrocarbon source rock shows bimodal distribution, 9-10% of the organic carbon frequency statistics still shows distribution, and the organic carbon frequency statistics shows that the organic carbon frequency statistics shows bimodal distribution and is high-quality hydrocarbon source rock; the pure lower section is in monomodal distribution, the main peak carbon distribution range is 1-4% (figure 3), and the standard of good-quality hydrocarbon source rock is achieved. But overall, the pure upper section source rock is better than the pure lower section source rock. Biomarker characteristics: general characteristics of source rock in the upper sand four stage: the content of rearranged stane and 4-methyl stane is low, and the dinostane is rich; the sterane content is high, the steryl/agastache ratio is high, and the contribution of eukaryotes (mainly algae and higher plants) to source rocks is reflected; the method has phytane advantages and abundant gamma-paraffins, the gamma-paraffin index is generally more than 0.3, and the deposition environment of the upper section of hydrocarbon source rock saltation reduction of Sasa four is reflected.
But due to the deposition period on Es4, lake water undergoes a process from salinization to desalination from early to late, and is therefore reflected in biomarker signatures. The main expression is in the following three aspects: firstly, the gamma-paraffins are gradually reduced from bottom to top, and the gamma-paraffins are higher at the lower part, sometimesEven higher than C30Hopane, with only moderate gamma waxy alkane content in the upper part; second, lower part C35Higher than hopane, having C35Hucholane > C34The distribution of the upper source rock is characterized by the fact that the higher source rock contains the hopane series C33Hucholane > C34＞C35Normal distribution characteristics of the hopane; thirdly, the content of lower 4-methyl sterane is lower, 4-methyl sterane/C29Regular sterane is generally less than 0.2, while the relative content of 4-methyl sterane is already high in the upper source rock (fig. 2, right panel). The variation of the above described living standard features microscopically reflects the heterogeneity of the source rock.
In general, the lower hydrocarbon source rocks of the pure lower section and the pure upper section mainly comprise high gamma-paraffin; the pure upper-section hydrocarbon source rocks mainly comprise medium-high gamma-paraffins, so that the upper-section hydrocarbon source rocks of the sand four can be divided into two sets; namely high-gamma-paraffin source rocks and medium-high gamma-paraffin source rocks, and lays a foundation for further research on oil and gas migration paths through fine classification of crude oil types and oil source comparison.
(2) Based on the fine heterogeneity evaluation of the hydrocarbon source rocks at the upper sand four above, crude oil is classified into 5 types according to different sources through oil source comparison (the biomarker characteristics are shown in figure 4).
Crude oil type I: from the sand four lower segment deep mudstone (high gamma-paraffins, low C)35Hopane), which is mainly distributed in a hole shop group reservoir of a Wangjiagang Dingjia house construction zone, and is derived from the lower hydrocarbon source rock of Saxiu.
Crude oil of type II: high gamma-paraffins, high C from Es4 upper (pure upper and lower + pure lower) source rock35Crude oil of hopane; the water-based oil-water-based gas-water-based oil-water mixed oil is mainly distributed in regions of. The sterane maturity parameter is 0.20-0.45, and the low-maturity crude oil and the mature crude oil exist, but the low-maturity crude oil is mainly used; the low-maturity crude oil is mainly distributed in Es4 sections of reservoirs in the slope area with the octahedral river and the south area of the nose-shaped structure of the Dingjia house; mature crude oil is distributed primarily in Es4 reservoirs near the depressed wang house region.
Crude oil of group III: medium and high gamma-paraffin crude oil from Es4 upper (purely upper) hydrocarbon source rock; the sand three reservoirs are mainly distributed in the depression zone and the sand three reservoirs near the fracture zone of the current river, the reservoirs Es1, Es2 and Ed of the fracture zone of the current river are also distributed, and the sand four-section reservoirs of the slope zone are distributed in a small amount.
And IV-type crude oil: crude oil from a single source of sand three-sectioned source rock; the distribution is very limited and only seen in a few wells of a hollow reservoir with sand.
Crude oil of class V: the source oil is derived from hydrocarbon source rocks of three sections of sand and four sections of sand. The crude oil is widely distributed in three-section sand turbidity fan sand bodies near the depressed zone and the current river fracture zone. The crude oil has the standard generation parameter between III crude oil and IV crude oil, and the gamma-paraffin index is generally 0.13-0.25.
After the crude oil is classified in this way, the different types of crude oil are found to have better regularity in spatial distribution. The distribution rule is consistent with the effective hydrocarbon discharge range of the source rock at the lower section of Es3 and the upper section of sand, and a foundation is laid for the next discussion of an oil and gas migration path.
(3) Oil and gas migration direction and path tracing
According to the basic principle of reservoir geochemistry, crude oil generated by the same hydrocarbon source rock in a depression generally has a maturity parameter which changes on a plane in the process of moving from the depression zone to the basin edge, and the maturity gradually decreases from the depression center to the edge. Therefore, the migration path of oil and gas can be traced by using the maturity parameter of the biomarker and combining the oil source identification result and the geological characteristics of the research area.
From the maturity parameter of the high-gamma waxy crude oil, the low-maturity oil crude oil and the mature crude oil exist, such as the low-maturity oil and the mature oil in the Wangjiagang region coexist, which indicates that the hydrocarbon is the hydrocarbon discharged from the hydrocarbon source rock at different maturity stages. Regarding the low maturity crude oil alone, it can be seen that the low maturity crude oil of the Wangjiagang region is rather lower than the crude oil of the octahedral river region far from the depressed portion of the cattle farm (FIG. 5), which illustrates Es4On the upper partThe initial migration scale and range of crude oil generated by hydrocarbon source rocks do not reach the range of current oil-gas distribution, but along with the increase of hydrocarbon generation and expulsion scale of the hydrocarbon source rocks, the wave type is gradually extrapolated to form reservoirs in the octahedral river region, and the view of near-source reservoir formation is provided.
The medium gamma-waxy crude oil is mainly mature oil and is mainly distributed in Es3 of the depressed zones and the North river fracture zone and the upper reservoir thereof (figure 6), the crude oil maturity of the depressed zones is high, the peripheral maturity is relatively low, and the mature crude oil of the depressed zones is shown to move to the periphery; meanwhile, the crude oil maturity near the fracture zone is relatively low, which indicates that the current river fault plays a vertical dredging role in oil and gas migration and is an effective dredging system for the vertical migration of the depressed oil and gas in the Niuzhuang.
From the north-south section of the over-depressed zone (figure 7), a series of pot-inclined faults from the depressed zone to the south to the wide-surrounded bulge have poor vertical diverting capability and only play a role in the lateral butt joint of the hydrocarbon source rock and the reservoir stratum due to Es3 lower part and Es4 lower partOn the upper partCapping of the top mudstone forces Es4On the upper partOil gas generated by hydrocarbon source rocks in sections (particularly high-gamma paraffin) is subjected to step-shaped lateral migration, mainly deposits in an Es4 reservoir, an Ek reservoir and a front third series reservoir, and enters a new Ed trap for depositing due to thinning or pinch-out of the stratum after reaching the edge of a basin.
The medium-high gamma waxy alkane crude oil is mainly distributed between the current river fault and the south officer 126 fault, and the fault between the two faults (due to small fault distance) does not play a role in the vertical migration of oil gas, so that the oil gas is mainly distributed in an Es3 section of lithologic oil reservoir, and the oil gas of the reservoir above Es3 is rarely distributed. The current river fault is an effective transportation and conduction system for vertical migration of oil and gas, so that oil and gas are distributed in reservoirs above Es3 near the current river fault.
Crude oil from an Es3 section of hydrocarbon source rock is limited in distribution and is only distributed in a lithologic oil reservoir of a depressed area Es3 reservoir, mixed source oil from Es4 and an Es3 source develops near a fracture area of the river, and medium-high gamma-paraffin crude oil is located between two faults represented by pink triangles.
In another aspect of the present application, there is provided a source rock hydrocarbon migration and path tracing apparatus comprising:
the evaluation module is used for carrying out heterogeneity evaluation on the hydrocarbon source rock according to the macroscopic characteristics and the microscopic indexes;
the partitioning module is used for finely partitioning the crude oil types generated by the hydrocarbon source rocks and comparing the oil sources based on the heterogeneity evaluation result so as to determine the sources and the spatial distribution of different crude oil types;
and the tracing module is used for carrying out oil and gas migration and path tracing on crude oil from the same source.
In another aspect of the present application, there is provided a storage medium having a computer program stored therein, the computer program, when executed by a processor, is capable of implementing a hydrocarbon source rock hydrocarbon migration and path tracing method comprising:
carrying out heterogeneity evaluation on the hydrocarbon source rock according to the macroscopic characteristics and the microscopic indexes;
based on the heterogeneity evaluation result, finely dividing the crude oil types generated by the hydrocarbon source rocks and comparing the oil sources to determine the sources and spatial distribution of different crude oil types;
and carrying out oil and gas migration and path tracing on crude oil from the same source based on the spatial distribution.
In another aspect of the present application, there is also provided a computer device, including: a processor and a storage medium having a computer program stored therein, the computer program when executed by the processor being capable of implementing a hydrocarbon source rock hydrocarbon migration and path tracing method comprising:
carrying out heterogeneity evaluation on the hydrocarbon source rock according to the macroscopic characteristics and the microscopic indexes;
based on the heterogeneity evaluation result, finely dividing the crude oil types generated by the hydrocarbon source rocks and comparing the oil sources to determine the sources and spatial distribution of different crude oil types;
and carrying out oil and gas migration and path tracing on crude oil from the same source based on the spatial distribution.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (11)
1. A hydrocarbon source rock hydrocarbon migration and path tracing method is characterized by comprising the following steps:
carrying out heterogeneity evaluation on the hydrocarbon source rock according to the macroscopic characteristics and the microscopic indexes;
based on the heterogeneity evaluation result, finely dividing the crude oil types generated by the hydrocarbon source rocks and comparing the oil sources to determine the sources and spatial distribution of different crude oil types;
and carrying out oil and gas migration and path tracing on crude oil from the same source based on the spatial distribution.
2. The method of claim 1, wherein the source rock is an active source rock development interval.
3. The method of claim 2, wherein the effective hydrocarbon source rock development interval is determined by: and determining the hydrocarbon source rock layer section with better hydrocarbon generation potential as an effective hydrocarbon source rock development layer section according to the development condition and/or the development type of the organic matter of the hydrocarbon source rock.
4. The method of claim 1 or 2, wherein the macro features comprise at least one of: the development thickness characteristic, the phase zone characteristic, the electrical characteristic and the organic matter abundance characteristic of the hydrocarbon source rock.
5. The method of claim 4, wherein the microscopic indicators comprise parameters of molecular biomarkers associated with migration.
6. The method of claim 5, wherein performing hydrocarbon migration and path tracing on crude oil from the same source based on the spatial distribution comprises: and carrying out oil and gas migration and path tracing on crude oil from the same source by using the parameters of the molecular biomarkers related to migration based on the spatial distribution.
7. The method of claim 6, wherein after determining the source and spatial distribution of the different crude oil types, the method further comprises:
and presenting the crude oil types from the same source on the same plan view, and marking the strata of the crude oil types in the spatial distribution.
8. The method of claim 5, wherein the species of molecular biomarkers comprise at least: galaraffins, stanols and hopane.
9. A source rock hydrocarbon migration and path tracing apparatus, comprising:
the evaluation module is used for carrying out heterogeneity evaluation on the hydrocarbon source rock according to the macroscopic characteristics and the microscopic indexes;
the partitioning module is used for finely partitioning the crude oil types generated by the hydrocarbon source rocks and comparing the oil sources based on the heterogeneity evaluation result so as to determine the sources and the spatial distribution of different crude oil types;
and the tracing module is used for carrying out oil and gas migration and path tracing on crude oil from the same source.
10. A storage medium having stored thereon a computer program which, when executed by a processor, is capable of implementing a source rock hydrocarbon migration and path tracing method as claimed in any one of claims 1 to 8.
11. A computer device, comprising: a processor and a storage medium having stored thereon a computer program which, when executed by the processor, is capable of implementing the source rock hydrocarbon migration and path tracing method of any one of claims 1 to 8.
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