CN111749685A - A method and device for determining data of oil and gas reservoir exploitation degree - Google Patents

Abstract

The invention provides a method and a device for determining exploitation degree data of an oil and gas reservoir, and relates to the technical field of oil and gas exploitation. The method and the device for determining the exploitation degree data of the oil and gas reservoir comprise the following steps: s1, acquiring historical data, acquiring oil-gas samples, oil-water ratios and water-gas ratios of sampling points in different periods, S2, generating hydrogen isotope values, performing hydrogen isotope measurement on the oil-gas samples acquired in S1, and generating corresponding hydrogen isotope values according to the hydrogen isotope measurement results of the sampling points in different periods. According to the method and the device for determining the oil and gas reservoir exploitation degree data, the historical data acquisition method is adopted, data can be rapidly acquired, the accuracy of determining the target single-well exploitation stage can be improved through the model relation among the hydrogen isotope value, the oil-water ratio and the water-gas ratio, data support is provided for determining a reasonable oil and gas reservoir exploitation method, the oil and gas recovery rate can be further improved, the service life of an oil and gas well is prolonged, and the economic benefit is enlarged.

Description

A method and device for determining data of oil and gas reservoir exploitation degree

technical field

The invention relates to the technical field of oil and gas exploitation, in particular to a method and a device for determining the exploitation degree data of oil and gas reservoirs.

Background technique

Oil and gas extraction is the process of extracting oil and natural gas buried in underground reservoirs from the ground. Oil and gas reservoir: It is the basic unit of oil and gas accumulation on the crust. It is the accumulation of oil and gas in a single trap, with an independent pressure system and a unified oil-water interface. In recent years, as the world's oil and gas exploration has begun to enter the era of both conventional and unconventional oil and gas, especially due to the continuous discovery of unconventional oil and gas and the deepening of research and exploration, traditional petroleum geology mainly based on conventional oil and gas reservoir research has gradually been discovered. It has become increasingly difficult for scientific theories to meet the needs of the new situation of oil and gas exploration and development, and many important concepts and theories of petroleum geology need to be re-understood and improved. Determining the extent of oil and gas reservoir exploitation is essential.

In the prior art, the current degree of shale gas exploitation is usually estimated according to the variation range of gas production. When the gas production drops significantly, it can be inferred that the free gas in the shale gas begins to deplete, and the adsorbed gas begins to be gradually released. The methods in the prior art cannot accurately determine the node at which the free gas collection is exhausted, and can only roughly determine whether the free gas begins to deplete. Especially for complex and small oil and gas reservoirs, the internal connectivity of the oil and gas reservoirs is poor, and the oil and gas reservoir exploitation degree data such as single-well oil and gas reservoir production performance data and pressure data can only reflect the oil and gas reservoir exploitation degree data of some oil and gas reservoirs, resulting in large errors in the exploitation degree data. When the data on the exploitation degree of the oil and gas reservoir changes, it cannot be processed, which can easily cause the water to fill a single well, resulting in the failure of exploitation in a single entry, and the waste of remaining oil and gas in a single well, which cannot meet the market demand.

SUMMARY OF THE INVENTION

The purpose of the invention provided by the present invention is to provide a method and a device for determining the data of the degree of exploitation of oil and gas reservoirs, so as to solve the above-mentioned problems in the background technology.

In order to achieve the above purpose, the present invention is achieved through the following technical solutions: a method and device for determining the degree of exploitation of oil and gas reservoirs, comprising the following steps:

S1. Obtain historical data: obtain oil and gas samples, oil-water ratio and water-gas ratio of sampling points in different periods.

S2. Generate hydrogen isotope values: perform hydrogen isotope determination on the oil and gas samples obtained in S1, and generate corresponding hydrogen isotope values according to the hydrogen isotope determination results at different periods of sampling points.

S3. Establish the relevant model relationship: analyze the hydrogen isotope values, oil-water ratio and water-gas ratio of the sampling points in different periods, and establish the model data relationship between the three.

S4. Determine the hydrogen isotope value of the target single well: collect the oil-water ratio and the water-gas ratio of the target single well, and determine the exploitation degree of the collected target single well according to the model data relationship established in S3.

Further, in the operation steps in S4, the following steps are also included:

S101. Compare the threshold interval according to the collection degree.

S102. Determine the mining stage according to the threshold interval.

Further, in the operation step in S101, the threshold interval includes a first production interval, a second production interval, a third production interval and a fourth production interval.

Further, in the operation step in S102, the production stage includes a preliminary production stage, a stable production production stage, a production reduction production stage, and a low production production stage.

Further, in the operation step in S4, when the hydrogen isotope value is in the first production stage, it is determined that the target single well is in the preliminary production stage, and when the hydrogen isotope value is in the second production stage, the target single well is determined. In the third production stage, when the hydrogen isotope value is in the initial production reduction stage, it is determined that the target single well is in the production reduction stage, and when the hydrogen isotope value is in the fourth production stage, it is determined that the target single well is in the low production production stage.

A device for determining data on the degree of exploitation of oil and gas reservoirs, comprising:

The data acquisition module is used to acquire the historical data of oil and gas samples, oil-water ratio and water-gas ratio of the sampling points in different periods.

The numerical value generation module is used to perform hydrogen isotope determination on the obtained oil and gas samples and generate corresponding hydrogen isotope values.

The model relationship module is used to establish the hydrogen isotope value, oil-water ratio and water-gas ratio of sampling points in different periods, and establish the model data relationship between the three.

The exploitation degree generation module determines the exploitation degree of the acquisition target single well according to the model data relationship.

Further, the output terminal of the data acquisition module is electrically connected to the input terminal of the numerical value generation module, and the output terminal of the model relationship module is electrically connected to the input terminal of the mining degree generation module.

Further, the exploitation degree generation module includes a target single well data import module, a processor module and a formal generation module, and the output end of the target single well data import module is electrically connected to the input end of the processor module, so The output end of the processor module is electrically connected to the input pad of the formal generation module.

The present invention provides a method and a device for determining the data of the exploitation degree of oil and gas reservoirs. Has the following beneficial effects:

The method and device for determining the exploitation degree data of oil and gas reservoirs can quickly and accurately determine the oil and gas reservoir exploitation degree data of the target oil and gas reservoir by acquiring historical data, based on the model relationship and the acquired data of the target oil and gas reservoir, and using the historical data The acquisition method can quickly collect data, and through the model relationship between the hydrogen isotope value, oil-water ratio and water-gas ratio, it can improve the accuracy of determining the production stage of the target single well, and provide data for determining a reasonable oil production method for oil and gas reservoirs Support, and then can improve oil and gas recovery, prolong the life of oil and gas wells, and expand economic benefits.

Description of drawings

Fig. 1 is the flow chart of the present invention;

Fig. 2 is the schematic diagram of the device of the present invention;

Fig. 3 is a schematic diagram of a mining degree generating module of the present invention.

Description of drawings: 1. Data acquisition module; 2. Numerical value generation module; 3. Model relationship module; 4. Production degree generation module; 401. Target single well data import module; 402, Processor module; 403, Formal generation module .

Detailed ways

Embodiment 1: Referring to Figures 1-3: The present invention provides a method and device for determining the degree of exploitation of oil and gas reservoirs, including the following steps:

Step 1. Obtain historical data: Obtain oil and gas samples, oil-water ratio and water-gas ratio of sampling points in different periods.

Step 2: Generate hydrogen isotope values: perform hydrogen isotope determination on the oil and gas samples obtained in step 1, and generate corresponding hydrogen isotope values according to the hydrogen isotope determination results at different periods of sampling points.

Step 3: Establish the relevant model relationship: analyze the hydrogen isotope values, oil-water ratio and water-gas ratio of the sampling points in different periods, and establish the model data relationship between the three.

Step 4: Determine the hydrogen isotope value of the target single well: collect the oil-water ratio and water-gas ratio of the target single well, and determine the exploitation degree of the collected target single well according to the model data relationship established in S3.

Specifically, in the operation steps in step 4, the following steps are also included:

S101. Compare the threshold interval according to the collection degree.

S102. Determine the mining stage according to the threshold interval.

Specifically, in the operation step in S101, the threshold interval includes a first mining interval, a second mining interval, a third mining interval, and a fourth mining interval.

Specifically, in the operation step in S102, the mining stage includes a preliminary mining stage, a stable production mining stage, a reduced production mining stage, and a low-yield mining stage.

Specifically, in the operation step in step 4, when the hydrogen isotope value is in the first production stage, it is determined that the target single well is in the preliminary production stage, and when the hydrogen isotope value is in the second production stage, it is determined that the target single well is in the third production stage In the production stage, when the hydrogen isotope value is in the initial production reduction stage, it is determined that the target single well is in the production reduction stage, and when the hydrogen isotope value is in the fourth production stage, it is determined that the target single well is in the low production production stage.

A device for determining data on the degree of exploitation of oil and gas reservoirs, comprising:

The data acquisition module 1 is used to acquire the historical data of oil and gas samples, oil-water ratio and water-gas ratio of the sampling points in different periods.

The numerical value generation module 2 is used to perform hydrogen isotope determination on the obtained oil and gas samples, and generate corresponding hydrogen isotope values.

The model relationship module 3 is used to establish the hydrogen isotope value, oil-water ratio and water-gas ratio of the sampling point in different periods, and establish the model data relationship between the three.

The exploitation degree generation module 4 determines the exploitation degree of the acquisition target single well according to the model data relationship.

Specifically, the output terminal of the data acquisition module 1 is electrically connected to the input terminal of the numerical value generation module 2 , the output terminal of the model relationship module 3 is electrically connected to the input terminal of the mining degree generation module 4 , and the data acquisition module 1 performs historical data analysis. Acquire, send the acquired data to the numerical generation module 2, the numerical generation module 2 generates the corresponding hydrogen isotope value, and transmits the hydrogen isotope value to the model relationship module 3, and the model relationship module 3 analyzes the hydrogen isotope value, oil and water value of the sampling point in different periods Compare the water-gas ratio, establish the model data relationship between the three, and send the model data relationship to the exploitation degree generation module 4. The exploitation degree generation module 4 combines the oil-water ratio and water-gas ratio of the acquisition target single well to generate the corresponding acquisition The degree of recovery of the target single well.

Specifically, the production degree generation module 4 includes a target single well data import module 401 , a processor module 402 and a formal generation module 403 . The output end of the target single well data import module 401 is electrically connected to the input end of the processor module 402 , the output end of the processor module 402 is electrically connected to the input pad of the formal generation module 403, and the target single well data import module 401 is used to import and collect the data of the oil-water ratio and water-gas ratio of the target single well, and transmit the data to the processing The processor module 402, the processor module 402 determines the exploitation degree of the acquisition target single well by combining the generated model data relationship, and transmits the exploitation degree to the formal generation module 403, and the formal generation module 403 generates a formal table.

In the present invention, the method and device for determining the degree of exploitation of oil and gas reservoirs can quickly and accurately determine the degree of exploitation data of the oil and gas reservoirs of the target oil and gas reservoirs by acquiring historical data, based on the model relationship and the acquired data of the target oil and gas reservoirs , using the acquisition method of historical data, can quickly collect data, through the model relationship between the hydrogen isotope value, oil-water ratio and water-gas ratio, can improve the accuracy of determining the development stage of the target single well, in order to determine the reasonable oil and gas reservoirs The oil recovery method provides data support, which in turn can improve oil and gas recovery, prolong the life of oil and gas wells, and expand economic benefits.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, some modifications and improvements can be made without departing from the inventive concept of the present invention, which all belong to the present invention. protected range.

Claims (8)

1. a method and device for determining oil and gas reservoir exploitation degree data, is characterized in that, comprises the following steps: S1. Obtain historical data: obtain oil and gas samples, oil-water ratio and water-gas ratio of sampling points in different periods; S2. Generate hydrogen isotope values: perform hydrogen isotope determination on the oil and gas samples obtained in S1, and generate corresponding hydrogen isotope values according to the hydrogen isotope determination results at different periods of sampling points; S3. Establish the relevant model relationship: analyze the hydrogen isotope values, oil-water ratio and water-gas ratio of the sampling points in different periods, and establish the model data relationship between the three; S4. Determine the hydrogen isotope value of the target single well: collect the oil-water ratio and the water-gas ratio of the target single well, and determine the exploitation degree of the collected target single well according to the model data relationship established in S3. 2. A method and device for determining oil and gas reservoir exploitation degree data according to claim 1, characterized in that, in the operation steps in S4, further comprising the following steps: S101. Compare the threshold interval according to the collection degree; S102. Determine the mining stage according to the threshold interval. 3. The method and device for determining the exploitation degree data of oil and gas reservoirs according to claim 2, wherein in the operation step in S101, the threshold interval comprises a first exploitation interval, a second exploitation interval, The third mining interval and the fourth mining interval. 4. A method and device for determining oil and gas reservoir exploitation degree data according to claim 3, wherein in the operation steps in S102, the exploitation stage comprises a preliminary exploitation stage, a stable production exploitation stage, and a production reduction exploitation stage and low-yield mining. 5 . The method and device for determining the degree of exploitation of oil and gas reservoirs according to claim 4 , wherein, in the operation step in S4 , when the hydrogen isotope value is in the first exploitation stage, the target unit is determined 5 . The well is in the preliminary production stage. When the hydrogen isotope value is in the second production stage, it is determined that the target single well is in the third production stage. When the hydrogen isotope value is in the initial production reduction stage, it is determined that the target single well is in the production reduction stage. When the hydrogen isotope value is in the fourth production stage, it is determined that the target single well is in the low-yield production stage. 6. A device for determining oil and gas reservoir exploitation degree data, characterized in that, comprising: The data acquisition module (1) is used to acquire the historical data of oil and gas samples, oil-water ratio and water-gas ratio of the sampling points in different periods; The numerical value generation module (2) is used to perform hydrogen isotope determination on the obtained oil and gas samples, and generate corresponding hydrogen isotope values; The model relationship module (3) is used to establish the hydrogen isotope value, oil-water ratio and water-gas ratio of the sampling point in different periods, and establish the model data relationship among the three; The exploitation degree generating module (4) determines the exploitation degree of the acquisition target single well according to the model data relationship. 7. The method and device for determining the degree of exploitation of oil and gas reservoirs according to claim 6, wherein the output end of the data acquisition module (1) is electrically connected to the input end of the numerical value generation module (2) , the output end of the model relationship module (3) is electrically connected with the input end of the mining degree generation module (4). 8. A method and device for determining oil and gas reservoir exploitation degree data according to claim 6, wherein the exploitation degree generating module (4) comprises a target single well data import module (401), a processor module (402) and a formal generation module (403), the output end of the single-well data import module (401) of the target is electrically connected with the input end of the processor module (402), and the output end of the processor module (402) The terminal is electrically connected to the input terminal of the formal generation module (403).

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