National oil and gas resource condition investigation and evaluation method based on public welfare data

Abstract

The invention provides a national oil and gas resource condition investigation and evaluation method based on public welfare data. The method comprises the following steps: (1) collecting resource quantity, reserves, yield, quality, structure and spatial distribution data of oil and gas resources; (2) establishing a quantity index feature assignment template; (3) establishing a quality index feature assignment template; (4) establishing a structure index feature assignment template; (5) establishing a spatial index feature assignment template; and (6) determining a national oil and gas resource favorable potential area. The method is reasonable in conception, can meet the assignment requirements of oil and gas resource quantity indexes, the assignment requirements of oil and gas resource quality indexes, the value requirements of oil and gas resource structure indexes and the value requirements of different types of oil and gas resource space indexes, and is suitable for popularization and application.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil and gas resource exploration, and particularly relates to a nationwide oil and gas resource national condition investigation and evaluation method based on public welfare data. BACKGROUND

[0002] The Oil and Gas Resource Investigation Center of China Geological Survey is carrying out the first nationwide oil and gas resource national condition investigation and evaluation. At present, the nationwide oil and gas resource national condition investigation and evaluation is carried out based on the Technical Requirements for Mineral Resources National Condition Investigation (Oil and Gas) 2020, which only stipulates the report writing related content, and fails to determine the next main exploration direction based on the results of the nationwide oil and gas resource national condition investigation and evaluation.

[0003] In addition, if the nationwide oil and gas resource national condition investigation is carried out according to the Technical Requirements for Mineral Resources National Condition Investigation (Oil and Gas) 2020, there are many limitations, only oil companies such as China Petroleum, China Petrochemical, China Offshore Oil, China United Coal and Yanchang Petroleum which have exploration rights and registered blocks can carry out the investigation. However, there is a lack of effective communication of data among oil companies, and it is difficult to form the results of the nationwide oil and gas resource national condition investigation and evaluation.

[0004] In order to effectively carry out the nationwide oil and gas resource national condition investigation and evaluation work, efficiently utilize the resource quantity and reserve evaluation data, and break down the data barriers among oil companies, the project team proposes a nationwide oil and gas resource national condition investigation and evaluation technical method based on the quantity index, quality index, structure index and spatial index of oil and gas resource quantity and reserve data. SUMMARY

[0005] In view of the technical problems in the above background art, the present application provides a nationwide oil and gas resource national condition investigation and evaluation method based on public welfare data, which has reasonable concept and can meet the value assignment requirements of oil and gas resource quantity index, the value assignment requirements of oil and gas resource quality index, the value taking requirements of oil and gas resource structure index and the value taking requirements of spatial index of different types of oil and gas resources, and is suitable for popularization and application.

[0006] To solve the above technical problems, the present application provides a nationwide oil and gas resource national condition investigation and evaluation method based on public welfare data, which comprises the following steps:

[0007] (1) Collecting the quantity, quality, structure and spatial distribution data of oil and gas resources;

[0008] (2) Establishing a quantity index characteristic value assignment template of a basin or an oil and gas field based on public welfare oil and gas investigation data;

[0009] (3) Establishing a quality index characteristic value assignment template of a basin or an oil and gas field based on public welfare oil and gas investigation data;

[0010] (4) Establish a structural index characteristic assignment template of a basin or an oil and gas field based on the public welfare oil and gas survey data;

[0011] (5) Establish a spatial index characteristic assignment template of a basin or an oil and gas field based on the public welfare oil and gas survey data;

[0012] (6) Determine the favorable potential area of the national oil and gas resources.

[0013] The method for evaluating the national oil and gas resources based on the public welfare data, wherein the step (2) is specifically a process of mastering the geological resources to be explored of the oil and gas resources, determining the proven recoverable reserves of the proven oil and gas field, determining different scales of the oil and gas field according to the resource and reserve division standards and referring to the standards for dividing the oil and gas fields into extra-large, large, medium, small and extra-small types, and giving the assignment scores to different scales of the oil and gas field.

[0014] The method for evaluating the national oil and gas resources based on the public welfare data, wherein the step (3) is specifically a process of mastering the structural index characteristics of the oil and gas resources, including the porosity, the permeability, the gas saturation and the relative density, determining the average value or the median of the porosity, the gas saturation, the permeability and the relative density of different oil and gas fields, and giving the assignment scores according to the values of the porosity, the gas saturation, the permeability and the relative density.

[0015] The method for evaluating the national oil and gas resources based on the public welfare data, wherein the step (4) is specifically a process of mastering two types of qualitative indexes of the development state and the reserve type of the oil and gas resources, dividing the development state into unexplored and explored, dividing the reserve type into expansion, new gas field, new block and new layer, and giving the assignment scores according to the development state and the reserve type of each oil and gas field.

[0016] The method for evaluating the national oil and gas resources based on the public welfare data, wherein the step (5) is specifically a process of mastering the spatial index characteristics of the oil and gas resources, including the effective thickness, the gas-bearing area, the gas reservoir type and the burial depth, determining the average value or the median of the effective thickness, the gas-bearing area, the gas reservoir type and the burial depth of different oil and gas fields, and giving the assignment scores to the average value or the median of the effective thickness, the gas-bearing area, the gas reservoir type and the burial depth of different oil and gas fields.

[0017] The method for evaluating the national oil and gas resources based on the public welfare data, wherein the step (6) is specifically a process of one-dimensionally scoring and queuing the oil and gas fields and two-dimensionally optimizing the oil and gas fields according to the assignment score results of the quantity index, the quality index, the structural index and the spatial index of the basin or the oil and gas field based on the public welfare oil and gas survey data, evaluating the exploration potential of the unit oil and gas according to the optimization results, and finally determining the favorable potential area of the national oil and gas resources.

[0018] The nationwide oil and gas resource national condition investigation evaluation method based on public welfare data, wherein the one-dimensional scoring queuing refers to scoring any one of the quantity index, the quality index, the structure index and the space index, and queuing any one of the quantity index, the quality index, the structure index and the space index according to the scoring results from large to small; the two-dimensional optimization refers to scoring any two or more indexes of the quantity index, the quality index, the structure index and the space index, and optimizing any two or more indexes according to the scoring results from large to small.

[0019] The nationwide oil and gas resource national condition investigation evaluation method based on public welfare data, wherein the exploration potential of the evaluation unit oil and gas in the step (6) is determined by the average value of the scores of the quantity index, the quality index, the structure index and the space index; the sum of the weight values of the four indexes is equal to 1.

[0020]

[0021] In the formula, P is the exploration potential of the unit oil and gas; q i , q j , q f and q k are the scores of the quantity index, the quality index, the structure index and the space index respectively; p i , p j , p f and p k are the weight values of the quantity index, the quality index, the structure index and the space index respectively.

[0022] By adopting the technical scheme, the present application has the following beneficial effects:

[0023] The application is based on the reasonable concept of the nationwide oil and gas resource national condition investigation and evaluation method of public welfare data, through analyzing the quantity index characteristics of the nationwide oil and gas resource quantity and reserve, the resource quantity, the to-be-proved geological resource quantity, the newly-added proved geological reserve, the cumulative proved geological reserve of different types of oil and gas resources (reserve) are mastered, and the regions with great oil and gas resource potential in the whole country are analyzed; through analyzing the quality index characteristics of the nationwide oil and gas resource quantity and reserve, the porosity, the gas saturation, the permeability and the relative density of different types of oil and gas resources (reserve) are mastered, and the oil and gas quality characteristics of the replacement area (potential area) of the nationwide oil and gas resources are analyzed, so as to lay a data foundation for further optimizing the favorable replacement area (potential area) of the nationwide oil and gas resources; through analyzing the structure index characteristics of the nationwide oil and gas resource quantity and reserve, two types of qualitative indexes, i.e., the development state and the reserve type of different types of oil and gas resources (reserve) are mastered, and the structure characteristics of the replacement area (potential area) of the nationwide oil and gas resources are analyzed, so as to lay a data foundation for further optimizing the favorable replacement area (potential area) of the nationwide oil and gas resources; through analyzing the spatial index characteristics of the nationwide oil and gas resource quantity and reserve, the layer, the effective thickness, the gas-bearing area, the gas reservoir type and the burial depth of different types of oil and gas resources (reserve) are mastered, and the oil and gas spatial characteristics of the replacement area (potential area) of the nationwide oil and gas resources are analyzed, so as to lay a data foundation for further optimizing the favorable replacement area (potential area) of the nationwide oil and gas resources; based on the quantization results of the quantity index, the quality index, the structure index and the spatial index, one-dimensional scoring and queuing and two-dimensional optimization are carried out, and the favorable replacement area (potential area) of the nationwide oil and gas resources is determined according to the optimization results.

[0024] The application also meets the following four aspects of value requirements of the quantity index, the quality index, the structure index and the spatial index:

[0025] (1) meets the value assignment requirements of the quantity index of oil and gas resources

[0026] ① resource quantity: meets the value assignment requirements of the resource quantity and the to-be-proved geological resource quantity of oil and gas;

[0027] ② reserve: meets the value assignment requirements of the proved technically recoverable reserve of oil and gas;

[0028] (2) meets the value assignment requirements of the quality index of oil and gas resources

[0029] ① porosity: meets the value assignment requirements of the extra-high, high, medium, low and extra-low porosity of oil and gas resources;

[0030] ② permeability: meets the value assignment requirements of the extra-high, high, medium, low, extra-low and dense permeability of oil and gas resources;

[0031] ③ oil (gas) saturation: meets the value assignment requirements of the extra-high, high, medium and low oil saturation of oil resources; meets the value assignment requirements of the high, medium and low gas saturation of gas resources;

[0032] (4) Density: meet the value requirements of ground crude oil density resources light, medium, heavy, super heavy density of assignment; meet the value requirements of natural gas relative density resources dry gas, wet gas.

[0033] (3) meet the value requirements of oil and gas resource structure index

[0034] ① Development state: meet the value requirements of oil and gas resource development state of undeveloped / developed;

[0035] ② Reserve type: meet the value requirements of oil and gas resource extension / new gas field / new block / new layer of four reserve types.

[0036] (4) meet the value requirements of different types of oil and gas resource space index

[0037] ① Effective thickness: meet the value requirements of oil and gas resource effective thickness of ≤2m, 2-10m(including 10m), 10-30m(including 30m), 30-50m(including 50m), >50m;

[0038] ② Gas-bearing area: meet the value requirements of oil and gas resource ≤5km 2 , 5-50km 2 (including 50km 2 ), 50-100km 2 (including 100km 2 ), 100-200km 2 (including 200km 2 ), >200km 2 ;

[0039] ③ Gas reservoir type: meet the value requirements of oil and gas resource lithology, structure-lithology, lithology-structure, structure, faulted anticline, anticline structure, structure-stratum, structural fault block, stratum-lithology, fault block-lithology, paleo-buried hill;

[0040] ④ Burial depth: meet the value requirements of oil and gas resource shallow, medium-shallow, medium-deep, deep, super-deep. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the description of the specific embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0042] Figure 1 It is the principle diagram of the present application based on the national oil and gas resource national conditions investigation and evaluation method of public welfare data. DETAILED DESCRIPTION

[0043] The technical solutions of the present application will be described clearly and completely below in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0044] The present application will be further explained and described below in combination with specific embodiments.

[0045] As shown in the figure, the present embodiment provides a nationwide oil and gas resource national condition investigation and evaluation method based on public welfare data, which specifically includes the following steps: Figure 1

[0046] (1) Collecting the quantity, quality, structure and spatial distribution data of oil and gas resources

[0047] Through channels such as authoritative websites, journals, government management departments, oil companies, academic associations, business trips, seminars or symposiums, etc., relevant information is collected, including quantity, quality, structure and spatial distribution data such as resource quantity, reserve quantity, production quantity, etc. Mainly including the following aspects:

[0048] ① Ministry of Natural Resources, “National Mineral Resources Reserve Bulletin”, “National Oil and Gas Mineral Reserve Bulletin”, “National Oil and Gas Resources Exploration and Development Bulletin”, “National Geological Exploration Bulletin”, “Natural Resources Report”, “Geological Exploration Guide”;

[0049] ② Annual plan table of geological survey projects of China Geological Survey Bureau, annual report and semi-annual report of geological survey;

[0050] ③ Information Center of Ministry of Natural Resources, “China Mineral Resources Annual Report”, “World Mineral Annual Review” and the like;

[0051] ④ Oil and Gas Information Briefing of Oil and Gas Resources Strategic Research Center of Ministry of Natural Resources;

[0052] ⑤ Websites of Ministry of Natural Resources, National Bureau of Statistics, State Oceanic Administration, China Petroleum and Natural Gas Group Corporation, China Petroleum Chemical Group Corporation, China Offshore Oil General Corporation and China Shenhua Group;

[0053] ⑥ Officially published maps (books) in China and abroad, information published or provided by major oil companies and oil institutions, and commercial databases purchased.

[0054] (2) Establishing a quantity index characteristic value assignment template of a basin or an oil and gas field based on public welfare oil and gas investigation data

[0055] ​Through the collection, collation and statistics of oil and gas resources (reserves) to be proven geological resources, the proven technical recoverable reserves of oil and gas fields are divided into different scales according to the resource and reserve classification standards, and the large, medium and small oil and gas field classification standards are referred to, to determine different scale oil and gas fields, and to give different scale oil and gas fields a value score. The value standard is shown in Tables 1-3.

[0056] According to the evaluation results of data collection, collation and statistics, the evaluation score is between different intervals, and the value size is between the minimum value and the intermediate value in this interval according to the resource and reserve data results.

[0057] Table 1: Classification table of oil and gas resource scale

[0058]

[0059] Table 2: Classification table of oil and gas proven resource scale

[0060]

[0061]

[0062] Table 3: Classification table of oil and gas reserve scale

[0063]

[0064] (3) Establish a quality index feature value template of basin or oil and gas field based on public welfare oil and gas survey data

[0065] Through the collection, collation and statistics of oil and gas resource (reserve) structure index features, including porosity, permeability, gas saturation and relative density, the average value or median of porosity, gas saturation, permeability and relative density of different oil and gas fields is determined, and the value score is given according to the porosity, gas saturation, permeability and relative density value (Tables 4-7).

[0066] According to the evaluation results of data collection, collation and statistics, the evaluation score is between different intervals, and the value size is between the minimum value and the intermediate value in this interval according to the resource and reserve data results.

[0067] Table 4: Classification table of oil and gas reservoir porosity

[0068]

[0069]

[0070] Table 5: Classification table of oil and gas reservoir permeability

[0071]

[0072] Table 6: Classification table of oil and gas saturation

[0073]

[0074] Table 7: Classification table of oil and gas reservoir density

[0075]

[0076] (4) Establishing a structure index characteristic assignment template of a basin or an oil and gas field based on the public welfare oil and gas survey data

[0077] By collecting, sorting and statistically analyzing the development status and reserve type of two types of qualitative indicators of oil and gas resources (reserves), the data results are assigned and scored (Table 8).

[0078] According to the evaluation results of data collection, sorting and statistical analysis, the evaluation score is between different intervals, and according to the data results of resource and reserve, the value of the assignment size is between the minimum value and the intermediate value in this interval.

[0079] Table 8: Classification table of oil and gas development status

[0080] development status reserve type assignment - new layer 4 - new block 3 developed new gas field 2 undeveloped expansion 1

[0081] (5) Establishing a space index characteristic assignment template of a basin or an oil and gas field based on the public welfare oil and gas survey data

[0082] By collecting, sorting and statistically analyzing the spatial index characteristics of oil and gas resources (reserves), including effective thickness, gas-bearing area, gas reservoir type and burial depth, the average or median of the effective thickness, gas-bearing area, gas reservoir type and burial depth of different oil and gas fields is determined, and the average or median of the effective thickness, gas-bearing area, gas reservoir type and burial depth of different oil and gas fields is assigned and scored (Table 9).

[0083] According to the evaluation results of data collection, sorting and statistical analysis, the evaluation score is between different intervals, and according to the data results of resource and reserve, the value of the assignment size is between the minimum value and the intermediate value in this interval.

[0084] Table 9: Classification table of oil and gas effective thickness, gas-bearing area and burial depth

[0085]

[0086] (6) Determining the favorable replacement area (potential area) of national oil and gas resources

[0087] On the basis of a large amount of statistical analysis, according to the scoring results of the quantity index, quality index, structure index and space index of the basins or oil and gas fields based on the public welfare oil and gas survey data, one-dimensional scoring and two-dimensional optimization are performed on the oil and gas fields, the exploration potential of the unit oil and gas is evaluated according to the optimization results, and finally the favorable potential area (potential area) of the national oil and gas resources is determined. Figure 1 ).

[0088] The one-dimensional scoring above refers to scoring any one of the quantity index, quality index, structure index and space index, and performing queuing from large to small according to the scoring results of any one index;

[0089] The two-dimensional optimization above refers to scoring any two or more indexes of the quantity index, quality index, structure index and space index, and performing score comprehensive queuing, i.e., optimization from large to small according to the scoring results of any two or more indexes.

[0090] The evaluation of the exploration potential of the unit oil and gas is mainly determined by the average value of the scores of the quantity index, quality index, structure index and space index; the sum of the weights of the quantity index, quality index, structure index and space index is equal to 1.

[0091]

[0092] In the formula, P is the exploration potential of the unit oil and gas; q i , q j , q f and q k are the scores of the quantity index, quality index, structure index and space index; p i , p j , p f and p k are the weights of the quantity index, quality index, structure index and space index.

[0093] The present application has reasonable concept, can meet the value assignment requirements of the quantity index of oil and gas resources, the value assignment requirements of the quality index of oil and gas resources, the value requirements of the structure index of oil and gas resources and the value requirements of the space index of different types of oil and gas resources, and is suitable for promotion and application.

[0094] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A national oil and gas resource survey and evaluation method based on public interest data, characterized in that, Includes the following steps: (1) Collect data on the quantity, quality, structure and spatial distribution of oil and gas resources; (2) Establish a quantitative indicator feature assignment template for basins or oil and gas fields based on public oil and gas survey data; (3) Establish a quality indicator feature assignment template for basins or oil and gas fields based on public oil and gas survey data; (4) Establish a structural index feature assignment template for basins or oil and gas fields based on public oil and gas survey data; (5) Establish a spatial index feature assignment template for basins or oil and gas fields based on public oil and gas survey data; (6) Identify the favorable potential areas for oil and gas resources nationwide.

2. The national oil and gas resource survey and evaluation method based on public interest data as described in claim 1, characterized in that, The specific process of step (2) is as follows: grasp the amount of unexplored geological resources of oil and gas resources, and determine the technically recoverable reserves of proven oil and gas fields according to the resource quantity and reserve classification standards, referring to the classification standards of extra-large, large, medium, small and extra-small oil and gas fields, and assign scores to oil and gas fields of different sizes.

3. The national oil and gas resource survey and evaluation method based on public interest data as described in claim 1, characterized in that, The specific process of step (3) is as follows: master the structural index characteristics of oil and gas resources, including porosity, permeability, gas saturation and relative density, determine the average or median values ​​of porosity, gas saturation, permeability and relative density of different oil and gas fields, and assign scores based on the values ​​of porosity, gas saturation, permeability and relative density.

4. The national oil and gas resource survey and evaluation method based on public interest data as described in claim 1, characterized in that, The specific process of step (4) is as follows: grasp the two qualitative indicators of oil and gas resource development status and reserve type. The development status is divided into undeveloped and developed, and the reserve type is divided into expansion, new gas field, new block and new layer. According to the development status and reserve type of each oil and gas field, assign a score.

5. The national oil and gas resource survey and evaluation method based on public interest data as described in claim 1, characterized in that, The specific process of step (5) is as follows: master the spatial index characteristics of oil and gas resources, including effective thickness, gas-bearing area, gas reservoir type and burial depth, determine the average or median of effective thickness, gas-bearing area, gas reservoir type and burial depth of different oil and gas fields, and assign scores to the average or median of effective thickness, gas-bearing area, gas reservoir type and burial depth of different oil and gas fields.

6. The national oil and gas resource survey and evaluation method based on public interest data as described in claim 1, characterized in that: The specific step (6) is to score the oil and gas fields in one dimension and rank them in two dimensions based on the quantitative, qualitative, structural and spatial indicators of the basin or oil and gas field based on the public oil and gas survey data, evaluate the exploration potential of the unit oil and gas based on the optimization results, and finally determine the favorable potential area of ​​oil and gas resources in the country.

7. The national oil and gas resource survey and evaluation method based on public interest data as described in claim 6, characterized in that: The one-dimensional scoring and ranking refers to scoring any one of the quantity, quality, structural and spatial indicators, and then ranking any one of the indicators from largest to smallest according to the scoring results. The two-dimensional optimization refers to scoring any two or more indicators among quantity indicators, quality indicators, structural indicators, and spatial indicators, and then ranking any two or more indicators based on the scoring results, i.e., optimizing from largest to smallest based on the scoring results.

8. The national oil and gas resource survey and evaluation method based on public interest data as described in claim 6, characterized in that: In step (6), the exploration potential of oil and gas in the evaluation unit is determined by the average of the scores assigned to four indicators: quantity, quality, structure, and space. The sum of the weights of these four indicators is equal to 1. In the above formula, P represents the exploration potential of a unit's oil and gas; q i q j q f and q k The scores are assigned to the quantitative, qualitative, structural, and spatial indicators, respectively; p i p j p f and p k These are the weights for quantity indicators, quality indicators, structural indicators, and spatial indicators, respectively.

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