Method and system for obtaining fireflooding leading edge propulsion speed and storage medium

Abstract

The invention belongs to the technical field of heavy oil reservoir engineering, and particularly relates to a method and system for obtaining the fireflooding leading edge propelling speed and a storage medium. According to the method for obtaining the propelling speed of the fireflood front edge, the propelling distance of the fireflood front edge is obtained according to altitude change caused by high temperature generated by combustion, and therefore the propelling speed of the fireflood front edge is obtained. According to the method, the fireflooding front horizontal direction distribution and the fireflooding front advancing speed can be obtained, reliable data support is provided for planning a gas injection scheme, the gas injection strength and the gas injection direction of different stages can be better adjusted, a combustion zone is evenly and stably propelled, and the optimal fireflooding effect is achieved.

Description

Background Art

[0001] The invention belongs to the technical field of heavy oil reservoir engineering, and in particular relates to a method, a system and a storage medium for obtaining a fire drive front advancement speed. Technical Field

[0002] Fire drive is a thermal oil recovery method that generates heat inside the oil layer. There is no heat loss along the wellbore. It can be used as an effective replacement technology after steam stimulation in deep layered heavy oil reservoirs. As one of the important methods to improve the recovery rate of heavy oil, fire drive has the advantages of high recovery rate, low cost and wide application range. Under the same conditions, the heat energy loss is only 25% of steam drive. Compared with steam drive and SAGD technology, fire drive has a wider range of applications. The prediction and control of the advancement speed of the fire drive front is the key to the successful development of fire drive. During the combustion process of the oil layer, the advancement speed of the fire drive front must be mastered at all times to better adjust the gas injection intensity and direction at different stages, so that the combustion zone can be advanced evenly and stably to achieve the best effect of fire drive.

[0003] In view of this, the present invention is proposed. Summary of the invention

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

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

[0006] A first aspect of the present invention provides a method for obtaining a fire driving front edge propulsion speed, wherein the propulsion distance of the fire driving front edge is obtained according to the change in altitude caused by the high temperature generated by combustion, thereby obtaining the fire driving front edge propulsion speed.

[0007] Further, the following steps are included:

[0008] Obtain the first elevation data of the study area before fire flooding;

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

[0010] Based on the first altitude data and the second altitude data, determine the altitude gradient data of the surface of the study area;

[0011] The change in the altitude of the fire front edge is calculated based on the predicted temperature;

[0012] Determine the horizontal distribution of the fire drive front through the change in the altitude 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] Wherein: the altitude gradient data includes altitude change data of each location in the study area.

[0016] Further, the following steps are included:

[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] Based on the first altitude data and the second altitude data, determine the altitude gradient data of the surface of the study area;

[0020] According to the predicted temperature, the altitude changes of the fire drive 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 drive front through the changes in the altitude of the fire drive front, the altitude of the burned area, the altitude of the coking zone, the altitude of the oil wall, the altitude 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] Wherein: the altitude gradient data includes altitude change data of each location in the study area.

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

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

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

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

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

[0030] First altitude data is obtained through a first model.

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

[0032] A two-dimensional orthophoto of the study area at a preset time after fire flooding is taken by drone;

[0033] Performing three-dimensional high-precision modeling through the two-dimensional orthophoto to obtain a second model;

[0034] The second altitude data is obtained through the second model.

[0035] A second aspect of the present invention provides a system for obtaining a fire drive front edge propulsion speed, which is used to execute the above-mentioned method.

[0036] A third aspect of the present invention provides a computer-readable storage medium, wherein the storage medium stores a computer program, and when the computer program is executed by a processor, the above-described method is implemented.

[0037] By adopting the above technical solution, the present invention has the following advantages:

[0038] 1. The present invention can obtain the horizontal distribution of the fire drive front and the advancement speed of the fire drive front, providing reliable data support for planning gas injection schemes.

[0039] 2. The present invention determines the horizontal distribution of the fire drive front by utilizing the altitude gradient. Compared with the traditional temperature monitoring method, this method is not affected by other heat dissipation factors in the formation, and the data acquisition is fast and reliable. Therefore, the obtained fire drive combustion front advancement speed is more accurate, which can provide reliable data support for planning the next gas injection plan.

[0040] 3. The present invention has the advantages of low cost and high precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 A method for obtaining the front edge propulsion speed of a fire drive in an embodiment of the present invention is shown in FIG. Figure 1 ;

[0043] Figure 2 A method for obtaining the front edge propulsion speed of a fire drive in an embodiment of the present invention is shown in FIG. Figure 2. DETAILED DESCRIPTION

[0044] The following description provides many different embodiments or examples for implementing different features of the present invention. The components and arrangements described in the following specific examples are only used to simplify the present invention and are only used as examples, not to limit the present invention.

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] This embodiment provides a method for obtaining the front edge propulsion speed of the fire drive.

[0047] The advancement distance of the fire drive front edge is obtained according to the change in altitude caused by the high temperature generated by the combustion, thereby obtaining the advancement speed of the fire drive front edge.

[0048] During the fire drive development process, high temperature will be generated at the fire drive front, causing the formation to expand. The change in altitude can be used to effectively determine the current location of the fire drive combustion front. By comparing the position of the fire drive front with the position before the fire drive, the advancement distance of the fire drive front can be obtained, and the advancement speed of the fire drive front can be obtained.

[0049] In some embodiments, Figure 1 As shown, the following steps are included:

[0050] Obtain the first elevation data of the study area before fire flooding;

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

[0052] Based on the first altitude data and the second altitude data, determine the altitude gradient data of the surface of the study area;

[0053] The change in the altitude of the fire front edge is calculated based on the predicted temperature;

[0054] Determine the horizontal distribution of the fire drive front through the change in the altitude of the fire drive front and the altitude gradient data;

[0055] The advancement distance of the fire driving front is obtained based on the horizontal distribution of the fire driving front;

[0056] The fire drive front edge advancement speed is obtained by calculating the fire drive front edge advancement distance and the preset time;

[0057] Wherein: the altitude gradient data includes altitude change data of each location in the study area, that is, altitude change data of any location or any point in the study area.

[0058] In some embodiments, Figure 2 As shown, the following steps are included:

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

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

[0061] Based on the first altitude data and the second altitude data, determine the altitude gradient data of the surface of the study area;

[0062] According to the predicted temperature, the altitude changes of the fire drive front, the burned area, the coking zone, the oil wall and the remaining oil area are calculated;

[0063] Determine the horizontal distribution of the fire drive front through the changes in the altitude of the fire drive front, the altitude of the burned area, the altitude of the coking zone, the altitude of the oil wall, the altitude of the remaining oil area and the altitude gradient data;

[0064] The advancement distance of the fire driving front is obtained based on the horizontal distribution of the fire driving front;

[0065] The fire drive front edge advancement speed is obtained by calculating the fire drive front edge advancement distance and the preset time;

[0066] Wherein: the altitude gradient data includes altitude change data of each location in the study area.

[0067] Since the fire front, burned area, coking zone, oil wall and remaining oil area all have altitude changes, and different altitude changes occur due to different temperatures, there is a fixed altitude change order for their altitude changes, i.e., altitude change of fire front> altitude change of burned area> altitude change of coking zone> altitude change of oil wall> altitude change of remaining oil area. Therefore, if the altitude change of fire front, altitude change of burned area, altitude change of coking zone, altitude change of oil wall and altitude change of remaining oil area are considered at the same time, the horizontal distribution of fire front is more accurate.

[0068] In some embodiments, the preset time is 24 hours to 72 hours.

[0069] In some embodiments, the preset time is 48 hours. If the preset time is too short, the advancement distance of the fire drive front is too short, and the measurement accuracy is low; if the preset time is too long, it will increase time and cost; so setting the preset time to 48 hours can both ensure accuracy and reduce costs.

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

[0071] The two-dimensional orthophoto of the study area before fire flooding was taken by drone;

[0072] Performing three-dimensional high-precision modeling through the two-dimensional orthophoto to obtain a first model;

[0073] First altitude data is obtained through a first model.

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

[0075] A two-dimensional orthophoto of the study area at a preset time after fire flooding is taken by drone;

[0076] Performing three-dimensional high-precision modeling through the two-dimensional orthophoto to obtain a second model;

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

[0078] Obtaining the first altitude data and the second altitude data by aerial photography modeling 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, of course, this method has the defects of low efficiency and high cost.

[0079] Preferably, the UAV adopts tic-tac-toe flight or five-way flight during flight, which is determined according to the shape of the specific research area.

[0080] This embodiment also provides a system for obtaining the propulsion speed of the fire drive front edge, which is used to execute any of the above methods.

[0081] This embodiment further provides a computer-readable storage medium, wherein the storage medium stores a computer program. When the computer program is executed by a processor, the above-described method is implemented.

[0082] The computer-readable storage medium of the embodiment of the present invention 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, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples (non-exhaustive list) of computer storage media include: an electrical connection with one or more wires, a portable computer disk, 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 disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this document, a computer storage medium can be any tangible medium containing or storing a program, which can be used by an instruction execution system, device or device or used in combination with it.

[0083] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, which carry computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than computer storage media, which may send, propagate, or transmit programs for use by or in conjunction with an instruction execution system, apparatus, or device.

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

[0085] Computer program code for performing the operations of the present invention may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or terminal. In the case of a remote computer, the remote computer may 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 may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0086] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for obtaining the front edge propulsion speed of a fire drive, characterized in that: The advancement distance of the fire drive front edge is obtained according to the change in altitude caused by the high temperature generated by the combustion, thereby obtaining the advancement speed of the fire drive front edge.

2. A method for obtaining the front edge propulsion speed of a fire drive according to claim 1, characterized in that: The steps include: 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; Based on the first altitude data and the second altitude data, determine the altitude gradient data of the surface of the study area; The change in the altitude of the fire front edge is calculated based on the predicted temperature; Determine the horizontal distribution of the fire drive front through the change in the altitude 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.

3. A method for obtaining the fire drive front edge propulsion speed according to claim 1, characterized in that: The steps include: 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; Based on the first altitude data and the second altitude data, determine the altitude gradient data of the surface of the study area; According to the predicted temperature, the altitude changes of the fire drive front, the burned area, the coking zone, the oil wall and the remaining oil area are calculated; Determine the horizontal distribution of the fire drive front through the changes in the altitude of the fire drive front, the altitude of the burned area, the altitude of the coking zone, the altitude of the oil wall, the altitude 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; Wherein: the altitude gradient data includes altitude change data of each location in the study area.

4. A method for obtaining the front edge propulsion speed of a fire drive according to claim 2 or 3, characterized in that: The preset time is 24h~72h.

5. A method for obtaining the fire drive front edge propulsion speed as claimed in claim 4, characterized in that: The preset time is 48 hours.

6. A method for obtaining the front edge propulsion speed of a fire drive according to claim 2 or 3, characterized in that: The obtaining of the first altitude data comprises the following steps: The two-dimensional orthophoto of the study area before fire flooding was taken by drone; Performing three-dimensional high-precision modeling through the two-dimensional orthophoto to obtain a first model; First altitude data is obtained through a first model.

7. A method for obtaining the fire drive front edge propulsion speed according to claim 6, 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 through the two-dimensional orthophoto to obtain a second model; The second altitude data is obtained through the second model.

8. A system for obtaining the propulsion speed of the front edge of a fire drive, characterized in that: Used to execute the method according to any one of claims 2 to 7.

9. 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 2 to 7 is implemented.

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