A method, system, and storage medium for obtaining a fire front advance velocity

Abstract

The present application belongs to the technical field of heavy oil reservoir engineering, and particularly relates to a method and system for obtaining a fire flooding front advancing speed and a storage medium. The method for obtaining the fire flooding front advancing speed obtains the advancing distance of the fire flooding front according to the altitude change caused by the high temperature generated by combustion, thereby obtaining the fire flooding front advancing speed. The present application can obtain the horizontal direction distribution of the fire flooding front and the fire flooding front advancing speed, provide reliable data support for planning a gas injection scheme, better adjust the gas injection intensity and the gas injection direction at different stages, make the combustion zone uniformly and stably advance, and achieve the best effect of fire flooding.

Description

BACKGROUND

[0001] The present application belongs to the technical field of heavy oil reservoir engineering, and particularly relates to a method and system for obtaining a fire flooding front advancing speed and a storage medium. TECHNICAL FIELD

[0002] Fire flooding is a thermal recovery method that generates heat inside the oil layer, and there is no heat loss along the wellbore, which can be used as an effective follow-up technology after steam huff and puff in deep stratified heavy oil reservoirs. As one of the important methods for improving heavy oil recovery, fire flooding has the advantages of high recovery efficiency, low cost and wide application range. Under the same conditions, the thermal energy loss is only 25% of that of steam flooding. Compared with steam flooding and SAGD technology, fire flooding has a wider application range. Prediction and control of the fire flooding front advancing speed is the key to the success of fire flooding development. In the process of oil layer combustion, the fire flooding front advancing speed needs to be grasped at any time, so as to better adjust the gas injection intensity and direction at different stages, and make the combustion zone uniformly and stably advance, so as to achieve the best effect of fire flooding.

[0003] In view of this, the present application is proposed. SUMMARY

[0004] In order to solve the technical problems existing in the prior art, the present application provides a method and system for obtaining a fire flooding front advancing speed and a storage medium. The present application can obtain the horizontal direction distribution of the fire flooding front and the fire flooding front advancing speed, provide reliable data support for planning a gas injection scheme, better adjust the gas injection intensity and direction at different stages, make the combustion zone uniformly and stably advance, and achieve the best effect of fire flooding.

[0005] The present application includes the following technical solutions:

[0006] The present application provides a method for obtaining a fire flooding front advancing speed in the first aspect. The advancing distance of the fire flooding front is obtained according to the altitude change caused by high temperature generated by combustion, so as to obtain the fire flooding front advancing speed.

[0007] Further, the method comprises the following steps:

[0008] Obtaining first altitude data of a research area before fire flooding;

[0009] Obtaining second altitude data of the research area at a preset time after the start of fire flooding;

[0010] Determining ground surface altitude gradient data of the research area based on the first altitude data and the second altitude data;

[0011] Calculating the altitude change of the fire flooding front according to the predicted temperature;

[0012] Determining the horizontal distribution of the fire drive front through the altitude change of the fire drive front and the altitude gradient data;

[0013] The advancement distance of the fire driving front is obtained based on the horizontal distribution of the fire driving front;

[0014] The fire drive front edge advancement speed is obtained by calculating the fire drive front edge advancement distance and the preset time;

[0015] The altitude gradient data include altitude change data of each location in the study area.

[0016] Further, the steps include:

[0017] Obtain the first elevation data of the study area before fire flooding;

[0018] Obtain the second altitude data of the study area at a preset time after the start of fire flooding;

[0019] Determine the surface altitude gradient data of the study area based on the first altitude data and the second altitude data;

[0020] According to the predicted temperature, the altitude changes of the fire flooding front, the burned area, the coking zone, the oil wall and the remaining oil area are calculated.

[0021] Determine the horizontal distribution of the fire flooding front through the altitude change of the fire flooding front, the altitude change of the burned area, the altitude change of the coking zone, the altitude change of the oil wall, the altitude change of the remaining oil area and the altitude gradient data;

[0022] The advancement distance of the fire driving front is obtained based on the horizontal distribution of the fire driving front;

[0023] The fire drive front edge advancement speed is obtained by calculating the fire drive front edge advancement distance and the preset time;

[0024] The altitude gradient data include altitude change data of each location in the study area.

[0025] Furthermore, the preset time is 24 hours to 72 hours.

[0026] Furthermore, the preset time is 48 hours.

[0027] Furthermore, obtaining the first altitude data includes the following steps:

[0028] The two-dimensional orthophoto images of the study area before fire flooding were taken by drone;

[0029] Performing three-dimensional high-precision modeling on the two-dimensional orthophoto to obtain a first model;

[0030] Obtaining first altitude data by the first model.

[0031] Further, the obtaining of the second altitude data comprises the following steps:

[0032] Obtaining a two-dimensional orthographic image of the study area by a UAV at a preset time after the fire drive;

[0033] Obtaining a second model by three-dimensional high-precision modeling based on the two-dimensional orthographic image;

[0034] Obtaining second altitude data by the second model.

[0035] The second aspect of the present application provides a system for obtaining the fire drive front edge advancing speed, which is used to execute the method described above.

[0036] The third aspect of the present application provides a computer readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the method described above is realized.

[0037] By adopting the technical scheme, the present application has the following advantages:

[0038] 1. The present application can obtain the horizontal distribution of the fire drive front edge and the advancing speed of the fire drive front edge, and provide reliable data support for planning the gas injection scheme.

[0039] 2. The present application uses the altitude gradient to determine the horizontal distribution of the fire drive front edge; compared with the traditional temperature monitoring method, the present application is not affected by other heat dissipation factors of the formation, and the data acquisition is fast and reliable; and the advancing speed of the fire drive combustion front edge obtained by the present application is more accurate, and the present application can provide reliable data support for planning the next gas injection scheme.

[0040] 3. The present application has the advantages of low cost and high precision. DETAILED DESCRIPTION

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

[0042] Figure 1 The flow of the method for obtaining the advancing speed of the fire drive front edge in an embodiment of the present application Figure One ;

[0043] Figure 2 The flow of the method for obtaining the advancing speed of the fire drive front edge in an embodiment of the present application Figure Two. DETAILED DESCRIPTION

[0044] The following description provides many different embodiments, or examples, for implementing different features of the application. Some embodiments of the application can be implemented only in one particular example, while other embodiments of the application can be implemented in multiple examples. The descriptions of the embodiments of the application are not meant to limit the application to a single embodiment, but rather to illustrate the many possible embodiments of the application.

[0045] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0046] The embodiment provides a method for obtaining a fire flooding front advancing speed,

[0047] The advancing distance of the fire flooding front is obtained according to the altitude change caused by the high temperature generated by combustion, so that the fire flooding front advancing speed is obtained.

[0048] In the fire flooding development process, the fire flooding front generates high temperature, so that the formation is expanded, and the current fire flooding combustion front position can be effectively judged through the altitude change. The advancing distance of the fire flooding front is obtained by comparing the position of the fire flooding front with the position before the fire flooding, and the advancing speed of the fire flooding front is obtained.

[0049] In some embodiments, as shown in Figure 1 The method comprises the following steps:

[0050] obtaining first altitude data of a study area before fire flooding;

[0051] obtaining second altitude data of the study area at a preset time after the fire flooding starts;

[0052] determining ground surface altitude gradient data of the study area based on the first altitude data and the second altitude data;

[0053] calculating the fire flooding front altitude change according to the predicted temperature;

[0054] determining the horizontal direction distribution of the fire flooding front through the fire flooding front altitude change and the altitude gradient data;

[0055] obtaining the advancing distance of the fire flooding front based on the horizontal direction distribution of the fire flooding front;

[0056] calculating the advancing speed of the fire flooding front through the advancing distance of the fire flooding front and the preset time;

[0057] The elevation gradient data includes the elevation change data of each position in the study area, i.e. the elevation change data of any position or point in the study area.

[0058] In some embodiments, as shown in Figure 2 The method comprises the following steps:

[0059] acquiring first elevation data of the study area before the fire flooding;

[0060] acquiring second elevation data of the study area at a preset time after the start of the fire flooding;

[0061] determining the ground elevation gradient data of the study area based on the first elevation data and the second elevation data;

[0062] calculating the elevation change of the fire front, the elevation change of the burned zone, the elevation change of the coking zone, the elevation change of the oil wall and the elevation change of the remaining oil zone according to the predicted temperature;

[0063] determining the horizontal distribution of the fire front based on the elevation change of the fire front, the elevation change of the burned zone, the elevation change of the coking zone, the elevation change of the oil wall, the elevation change of the remaining oil zone and the elevation gradient data;

[0064] obtaining the advancing distance of the fire front based on the horizontal distribution of the fire front;

[0065] calculating the advancing speed of the fire front based on the advancing distance of the fire front and the preset time;

[0066] The elevation gradient data includes the elevation change data of each position in the study area.

[0067] Since the fire front, the burned zone, the coking zone, the oil wall and the remaining oil zone all have elevation changes, and because of the different temperatures, there are different elevation changes, but for the height change, there is a fixed elevation change sequence, i.e. the elevation change of the fire front > the elevation change of the burned zone > the elevation change of the coking zone > the elevation change of the oil wall > the elevation change of the remaining oil zone. Therefore, the horizontal distribution of the fire front determined by simultaneously considering the elevation change of the fire front, the elevation change of the burned zone, the elevation change of the coking zone, the elevation change of the oil wall and the elevation change of the remaining oil zone is more accurate.

[0068] In some embodiments, the preset time is 24h-72h.

[0069] In some embodiments, the preset time is 48 hours. If the preset time is too short, the advancing distance of the fire-flood front is too short, and the measurement accuracy is low. If the preset time is too long, time and cost are increased. Therefore, the preset time is set to 48 hours to ensure accuracy and reduce cost.

[0070] In some embodiments, the obtaining of the first altitude data comprises the following steps:

[0071] The two-dimensional orthographic image of the research area before the fire-flood front is obtained by aerial photography of a UAV.

[0072] The first model is obtained by three-dimensional high-precision modeling based on the two-dimensional orthographic image.

[0073] The first altitude data is obtained by the first model.

[0074] In some embodiments, the obtaining of the second altitude data comprises the following steps:

[0075] The two-dimensional orthographic image of the research area at the preset time after the fire-flood front is obtained by aerial photography of a UAV.

[0076] The second model is obtained by three-dimensional high-precision modeling based on the two-dimensional orthographic image.

[0077] The second altitude data is obtained by the second model.

[0078] The first altitude data and the second altitude data are obtained by aerial photography modeling, which has the advantages of high efficiency and low cost. It should be noted that the first altitude data and the second altitude data can also be obtained by measurement, which has the defects of low efficiency and high cost.

[0079] Preferably, the UAV adopts a cross flight or a five-direction flight during the flight, which is determined according to the shape of the specific research area.

[0080] The embodiment also provides a system for obtaining the advancing speed of the fire-flood front, which is used to execute the method described in any one of the above embodiments.

[0081] The embodiment also provides a computer readable storage medium, which stores a computer program. When the computer program is executed by a processor, the method described above is realized.

[0082] The computer readable storage medium of the embodiments of the present application can adopt any combination of one or more computer readable media. The computer readable medium can be a computer readable signal medium or a computer storage medium. The computer storage medium can be, for example but not limited to, an electrical, a magnetic, an optical, an electromagnetic, an infrared, or a semiconductor system, device or apparatus, or any combination of the above. More specific examples (a non-exhaustive list) of the computer storage medium include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this document, the computer storage medium can be any tangible medium that contains or stores a program in a form that can be used by or in connection with an instruction execution system, apparatus or device.

[0083] The computer readable signal medium can include a computer readable program code in a baseband or propagated as a carrier wave in a propagation medium. The propagated data signal can take any of a variety of forms, including but not limited to electro-magnetic, optical, or any suitable combination thereof. The computer readable signal medium can be any computer readable medium that is not a computer storage medium and that can communicate, propagate or transport a program for use by or in connection with an instruction execution system, apparatus, or device.

[0084] Program code embodied on a computer readable medium can be transmitted using any appropriate medium, including but not limited to wireless, wire line, optical fiber cable, RF, etc., or any suitable combination of the above.

[0085] Computer program code for carrying out operations of the present application can be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider). In an embodiment of the application, the remote computer can be a server or another desktop computer.

[0086] Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood that modifications can be made to the foregoing embodiments, or additional implementations of the present application can be implemented, without departing from the spirit or scope of the application. Accordingly, the present application is not limited except as by the appended claims.

Claims

1. A method for obtaining the propulsion speed of a fire drive front, characterized in that: The advancement distance of the fire drive front is obtained based on the change in altitude caused by the expansion of the stratum due to the high temperature generated by the combustion, thereby obtaining the advancement speed of the fire drive front, including the following steps: Obtain the first elevation data of the study area before fire flooding; Obtain the second altitude data of the study area at a preset time after the start of fire flooding; Determine the surface altitude gradient data of the study area based on the first altitude data and the second altitude data; The change in altitude of the fire front is calculated based on the predicted temperature; Determining the horizontal distribution of the fire drive front through the altitude change of the fire drive front and the altitude gradient data; The advancement distance of the fire driving front is obtained based on the horizontal distribution of the fire driving front; The fire drive front edge advancement speed is obtained by calculating the fire drive front edge advancement distance and the preset time; Wherein: the altitude gradient data includes altitude change data of each location in the study area; Alternatively, the advancement distance of the fire drive front is obtained based on the change in altitude caused by the expansion of the stratum due to the high temperature generated by the combustion, thereby obtaining the advancement speed of the fire drive front, including the following steps: Obtain the first elevation data of the study area before fire flooding; Obtain the second altitude data of the study area at a preset time after the start of fire flooding; Determine the surface altitude gradient data of the study area based on the first altitude data and the second altitude data; According to the predicted temperature, the altitude changes of the fire flooding front, the burned area, the coking zone, the oil wall and the remaining oil area are calculated. Determine the horizontal distribution of the fire flooding front through the altitude change of the fire flooding front, the altitude change of the burned area, the altitude change of the coking zone, the altitude change of the oil wall, the altitude change of the remaining oil area and the altitude gradient data; The advancement distance of the fire driving front is obtained based on the horizontal distribution of the fire driving front; The fire drive front edge advancement speed is obtained by calculating the fire drive front edge advancement distance and the preset time; The altitude gradient data include altitude change data of each location in the study area.

2. The method for obtaining the fire drive front edge propulsion speed according to claim 1, characterized in that: The preset time is 24 hours to 72 hours.

3. The method for obtaining the fire drive front edge propulsion speed according to claim 2, characterized in that: The preset time is 48 hours.

4. The method for obtaining the fire drive front edge propulsion speed according to claim 1, characterized in that: The acquisition of the first altitude data comprises the following steps: The two-dimensional orthophoto images of the study area before fire flooding were taken by drone; Performing three-dimensional high-precision modeling on the two-dimensional orthophoto to obtain a first model; First altitude data is obtained through a first model.

5. The method for obtaining the fire drive front edge propulsion speed according to claim 4, characterized in that: The obtaining of the second altitude data comprises the following steps: A two-dimensional orthophoto of the study area at a preset time after fire flooding is taken by drone; Performing three-dimensional high-precision modeling on the two-dimensional orthophoto to obtain a second model; Second altitude data is obtained through a second model.

6. A system for obtaining the propulsion speed of a fire drive leading edge, characterized in that: Used to perform the method according to any one of claims 1 to 5.

7. A computer-readable storage medium, characterized in that The storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 5 is implemented.

Images