Method, device, medium and equipment for dividing oil and gas migration and accumulation dividing grooves influenced by sand bodies

Abstract

The invention discloses a sand body influenced oil and gas migration and accumulation segmentation groove division method, which comprises the following steps of: setting model parameters based on a seismic section and a drilling permeability parameter, and establishing a first laboratory model with a sand body on one side and a second laboratory model without a sand body on one side; petroleum filling observation is carried out based on the first laboratory model and the second laboratory model, and the oil outlet amount of the first laboratory model and the oil outlet amount of the second laboratory model are recorded; according to the oil outlet quantity of the first laboratory model and the second laboratory model, the proportion of the oil outlet quantity of the first laboratory model and the second laboratory model in the total oil injection quantity is calculated, the volume of the hydrocarbon source rock is divided according to the proportion, and the volume boundary is the position of the dividing groove. According to the method, the oil-gas migration-accumulation segmentation groove is predicted from the perspective of laboratory petroleum filling physical simulation, the method is more accurate than a method for dividing the oil-gas migration-accumulation segmentation groove by adopting the structure height trend, then the oil-gas migration-accumulation unit is accurately divided, the oil-gas resource quantity in the migration-accumulation unit is implemented, and service is provided for exploration selection decision making.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas exploration and development, and in particular to a method, device, medium and equipment for dividing oil and gas migration and accumulation grooves influenced by sand bodies. Background Art

[0002] The oil and gas migration and accumulation process follows the fluid potential theory. Oil and gas migrate from high potential areas to low potential areas. The greater the fluid potential difference, the more favorable it is for oil and gas to migrate in the direction of the large potential difference. At the same time, they accumulate in low potential areas with reservoir formation conditions. Among them, the line connecting the highest values ​​of fluid potential is the dividing groove. On both sides of the dividing groove, oil and gas migrate radially in opposite directions. The dividing groove is the boundary that controls the direction of oil and gas migration and accumulation. Therefore, the dividing groove is crucial in the study of oil and gas migration and accumulation units.

[0003] At present, the existing method of dividing the oil and gas migration and accumulation troughs is based on the structural high and low trends. The highest value of fluid potential can be automatically identified by computer, and the line connecting the highest values ​​is the dividing trough. However, the above-mentioned dividing trough division method only considers the influence of structural high and low on the dividing trough. When there are other geological factors that affect the change of fluid potential, this method cannot correctly identify the position of the dividing trough, thereby affecting the division of oil and gas migration and accumulation units. (Fan) delta sand bodies are common in oil and gas basins. Compared with other lithologies, sandstone has the characteristics of high porosity and high permeability, which has a significant impact on the change of fluid potential, thereby affecting the division of oil and gas migration and accumulation troughs, resulting in the existing oil and gas migration and accumulation dividing trough division method is not accurate enough. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a method for dividing oil and gas migration and accumulation grooves influenced by sand bodies, aiming to solve the problem that the current method of dividing oil and gas migration and accumulation grooves using structural high and low trends is not accurate enough.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] In a first aspect, the present invention provides a method for dividing oil and gas migration and accumulation grooves affected by sand bodies, comprising the following steps:

[0007] The model parameters are set based on the seismic profile and the drilling permeability parameters, and a first laboratory model containing sand bodies on one side and a second laboratory model containing no sand bodies on the other side are established;

[0008] Conduct oil filling observation based on the first laboratory model and the second laboratory model, and record the oil output of the first laboratory model and the second laboratory model;

[0009] According to the oil output of the first laboratory model and the second laboratory model, the proportion of the oil output of the first laboratory model and the second laboratory model to the total oil injection is calculated respectively, and the volume of the source rock is divided according to the proportion, and the volume boundary is the location of the dividing groove.

[0010] As a preferred embodiment, the “setting model parameters based on seismic profiles and drilling permeability parameters to establish a first laboratory model containing sand bodies on one side and a second laboratory model containing no sand bodies on one side” is specifically:

[0011] Select the seismic profile and convert it into a geological profile, and measure the length and height of the geological profile;

[0012] Measure the length and height of the laboratory model mold, and determine the conversion ratio coefficient between the geological section and the laboratory model based on the length and height of the geological section;

[0013] Statistical permeability parameters of each formation encountered by drilling;

[0014] The geological profile is converted into a laboratory model according to a determined conversion ratio coefficient, and the formation permeability of the laboratory model is set according to the statistical permeability parameters of each formation. Then, the volume of the source rock of the laboratory model is measured, and a first laboratory model with sand body on one side and a second laboratory model without sand body on one side are established, and an oil outlet is set on both sides above the first laboratory model and the second laboratory model.

[0015] As a preferred embodiment, the “carrying out oil filling observation based on the first laboratory model and the second laboratory model, and recording the oil output of the first laboratory model and the second laboratory model” is specifically:

[0016] injecting petroleum into the source rocks of the first laboratory model and the second laboratory model until the source rocks are saturated with petroleum;

[0017] After the source rock is saturated with oil, oil injection continues, and the oil output from the oil outlets on both sides of the first laboratory model and the second laboratory model is recorded. When the sum of the oil output from the oil outlets on both sides is equal to the total oil injection amount, the injection of the first laboratory model and the second laboratory model is stopped.

[0018] As a preferred embodiment, the above-mentioned “according to the oil output of the first laboratory model and the second laboratory model, respectively calculating the proportion of the oil output of the first laboratory model and the second laboratory model to the total oil injection amount, and dividing the volume of the source rock according to the proportion, and the volume boundary is the dividing groove position” is specifically:

[0019] The proportion of the oil output from the oil outlets on both sides of the first laboratory model and the second laboratory model to the total oil injection volume is calculated by the following formula:

[0020] α i =A i / B*100

[0021] In the formula, α is the ratio of the oil output to the total oil injection; A is the oil output of the oil outlet; B is the total oil injection; i is the first side or second side oil outlet;

[0022] According to the proportion of the oil output from the oil outlets on both sides of the first laboratory model and the second laboratory model to the total oil injection, the volume of the source rock on both sides is divided, and the volume boundary between the two is the location of the dividing groove.

[0023] In a second aspect, the present invention provides a device for dividing oil and gas migration and accumulation partition grooves affected by sand bodies, comprising:

[0024] A first processing unit is used to set model parameters based on seismic profiles and drilling permeability parameters to establish a first laboratory model containing sand bodies on one side and a second laboratory model containing no sand bodies on one side;

[0025] A second processing unit is used to carry out oil filling observation based on the first laboratory model and the second laboratory model, and record the oil output of the first laboratory model and the second laboratory model;

[0026] The third processing unit is used to calculate the proportion of the final oil output of the first laboratory model and the second laboratory model to the total oil injection according to the oil output of the first laboratory model and the second laboratory model, and divide the volume of the source rock proportionally, and the volume boundary is the dividing groove position.

[0027] In a third aspect, the present invention provides a computer-readable storage medium storing a computer program, wherein the computer program is executed by a processor to control the device where the processor is located to implement the steps of the method for dividing oil and gas migration and accumulation grooves affected by sand bodies as described in the first aspect of the present invention.

[0028] In a fourth aspect, the present invention provides a computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method for dividing oil and gas migration and accumulation grooves influenced by sand bodies as described in the first aspect of the present invention when executing the computer program.

[0029] The present invention adopts the above technical solution, which has the following advantages:

[0030] The method based on the laboratory model of the present invention optimizes the influence of sand bodies on the division of oil and gas migration and accumulation partition grooves. Therefore, the oil and gas migration and accumulation partition grooves are divided by the present invention, and the oil and gas migration and accumulation partition grooves are predicted from the perspective of laboratory petroleum filling physical simulation. It is more accurate than the method of dividing the oil and gas migration and accumulation partition grooves by structural high and low trends, and then the oil and gas migration and accumulation units are accurately divided, the amount of oil and gas resources in the migration and accumulation units is determined, and the decision-making of exploration area selection is served. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Throughout the accompanying drawings, the same reference numerals are used to represent the same components. In the accompanying drawings:

[0032] Figure 1 A flow chart of a method for dividing oil and gas migration and accumulation partition grooves provided in an embodiment of the present invention;

[0033] Figure 2 It is a schematic diagram of the laboratory model and the position of the dividing groove in the present invention. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the present invention clearer, the specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0035] The method for dividing oil and gas migration and accumulation segmentation grooves affected by sand bodies provided by the present invention includes: setting model parameters based on seismic profiles and drilling permeability parameters, establishing a first laboratory model containing sand bodies on one side and a second laboratory model without sand bodies on one side; conducting oil filling observations based on the first laboratory model and the second laboratory model, and recording the oil output of the first laboratory model and the second laboratory model; according to the oil output of the first laboratory model and the second laboratory model, calculating the proportion of the oil output of the first laboratory model and the second laboratory model to the total oil injection, and dividing the volume of the source rock in proportion, and the volume boundary is the segmentation groove position. The present invention predicts the oil and gas migration and accumulation segmentation groove from the perspective of laboratory oil filling physical simulation, which is more accurate than the method of dividing the oil and gas migration and accumulation segmentation grooves using structural high and low trends, and then accurately divides the oil and gas migration and accumulation units, implements the amount of oil and gas resources in the migration and accumulation units, and serves the exploration area selection decision-making.

[0036] The following is a detailed description of the method and device for dividing oil and gas migration and accumulation grooves affected by sand bodies provided by the embodiments of the present invention in conjunction with the accompanying drawings.

[0037] Embodiment 1:

[0038] See also Figure 1 The present embodiment provides a method for dividing oil and gas migration and accumulation grooves affected by sand bodies, comprising the following steps:

[0039] S100. Setting model parameters based on seismic profiles and drilling permeability parameters, establishing a first laboratory model containing sand bodies on the right side and a second laboratory model without sand bodies on the right side, specifically:

[0040] S101. Select a seismic profile and convert it into a geological profile, and measure the length and height of the geological profile;

[0041] Taking a two-dimensional seismic profile of a basin as an example, the seismic profile is converted into a geological profile, and the length and height of the geological profile are measured to be 24000m and 6000m respectively.

[0042] S102. Measure the length and height of the mold for establishing the laboratory model, and determine the conversion ratio coefficient between the geological profile and the laboratory model in combination with the length and height of the geological profile in step S101;

[0043] The length and height of the laboratory model mold used in this experiment are 80 cm and 50 cm respectively. The length and height of the geological section in step S101 are 24,000 m and 6,000 m respectively. The proportional coefficients of the length and height of the geological section converted into the length and height of the laboratory model are determined to be 1 / 30,000 and 1 / 12,000 respectively.

[0044] S103. Count the permeability parameters of each formation encountered during drilling (see Table 1 below).

[0045] Table 1 Permeability parameters of various strata

[0046]

[0047]

[0048] S104. The geological profile is converted into a laboratory model according to the conversion ratio coefficient determined in step S102, and the formation permeability of the laboratory model is set according to the permeability parameters of each formation statistically calculated in step S103, and then the volume of the source rock of the laboratory model is measured, and a first laboratory model containing sand bodies on the right side and a second laboratory model without sand bodies on the right side are established, and an oil outlet is set on the left and right sides above each laboratory model;

[0049] The length and height of the geological section were converted into a laboratory model with a length of 80 cm, a height of 50 cm, and a thickness of 3 cm according to the conversion ratio coefficients of 1 / 30000 and 1 / 12000. The formation permeability of the laboratory model was set according to Table 1, and the volume of the source rock of the laboratory model was measured to be 150 cm. 3 , respectively establish a first laboratory model containing sand bodies on the right side and a second laboratory model without sand bodies on the right side, and set an oil outlet on the left and right sides above each laboratory model.

[0050] S200. Carry out oil filling observation based on the first laboratory model and the second laboratory model, and record the oil output of the first laboratory model and the second laboratory model, specifically:

[0051] S201. Filling the source rocks of the first laboratory model and the second laboratory model with oil until the source rocks are saturated with oil;

[0052] S202. After the source rock is saturated with oil, continue to inject oil, record the oil output from the oil outlets on the left and right sides of the first laboratory model and the second laboratory model, and stop injecting oil into the first laboratory model and the second laboratory model when the sum of the oil output from the oil outlets on both sides is equal to the total amount of oil injected;

[0053] After the source rock is saturated with oil, the oil output from the left and right oil outlets of the first and second laboratory models is recorded. At 5733 min, the sum of the oil output from the oil outlets on both sides is equal to the total oil injection volume of 195 ml, and the injection of the first and second laboratory models is stopped. The oil output from the left and right oil outlets of the first and second experimental models is shown in Table 2 below.

[0054] Table 2 Statistics of oil output from the left and right oil outlets of the first and second experimental models

[0055]

[0056]

[0057] S300. According to the oil yields of the first laboratory model and the second laboratory model, the proportion of the oil yields of the first laboratory model and the second laboratory model to the total oil injection volume is calculated respectively, and the volume of the source rock is divided according to the proportion. The volume boundary between the two is the location of the dividing groove, specifically:

[0058] S301. Calculate the proportion of the oil output from the oil outlets on the left and right sides of the first laboratory model and the second laboratory model to the total oil injection volume by the following formula:

[0059] α i =A i / B*100

[0060] In the formula, α is the ratio of the oil output to the total oil injection; A is the oil output of the oil outlet; B is the total oil injection; i is the left or right oil outlet;

[0061] At 5733 min, the total oil output of the first laboratory model was equal to the total oil injection. The oil output A1 of the left oil outlet was 18 ml, the oil output A2 of the right oil outlet was 177 ml, and the total oil injection B was 195 ml. According to the formula, the oil output ratio α1 of the left oil outlet was 9%, and the oil output ratio α2 of the right oil outlet was 91%.

[0062] At 5733 min, the total oil output of the second laboratory model was equal to the total oil injection. The oil output A1 of the left oil outlet was 109 ml, the oil output A2 of the right oil outlet was 86 ml, and the total oil injection B was 195 ml. According to the formula, the oil output ratio α1 of the left oil outlet was 56%, and the oil output ratio α2 of the right oil outlet was 44%.

[0063] S302. Divide the volume of the source rocks on the left and right sides according to the ratio of the oil output of the oil outlets on the left and right sides of the first laboratory model and the second laboratory model to the total oil injection, and the volume boundary between the two is the location of the dividing groove;

[0064] The oil output ratio α1 of the left oil outlet of the first laboratory model is 9%, and the oil output ratio α2 of the right oil outlet is 91%. According to the ratio, the volume of the left source rock is 0.09 times of 150, that is, 13.5 cm 3 The volume of the source rock on the right is 0.91 times of 150, or 136.5 cm 3 The volume boundary of the two is the location of the split groove (see Figure 2 ).

[0065] The oil output ratio α1 of the left oil outlet of the second laboratory model is 56%, and the oil output ratio α2 of the right oil outlet is 44%. According to the ratio, the volume of the left source rock is 0.56 times of 150, that is, 84 cm 3 The volume of the source rock on the right is 0.44 times of 150, or 66 cm 3 The volume boundary of the two is the location of the split groove (please continue to refer to Figure 2 ).

[0066] Embodiment 2:

[0067] The above-mentioned embodiment 1 provides a method for dividing oil and gas transport and accumulation segmentation grooves affected by sand bodies. Correspondingly, this embodiment provides a device for dividing oil and gas transport and accumulation segmentation grooves affected by sand bodies. The device for dividing oil and gas transport and accumulation segmentation grooves provided in this embodiment can implement the method for dividing oil and gas transport and accumulation segmentation grooves in embodiment 1. The device for dividing oil and gas transport and accumulation segmentation grooves can be implemented by software, hardware, or a combination of software and hardware. For example, the device for dividing oil and gas transport and accumulation segmentation grooves can include integrated or separate functional modules or functional units to execute the corresponding steps in each method of embodiment 1. Since the device for dividing oil and gas transport and accumulation segmentation grooves in this embodiment is basically similar to the method embodiment, the process described in this embodiment is relatively simple. For relevant matters, please refer to the partial description of embodiment 1. The device for dividing oil and gas transport and accumulation segmentation grooves in this embodiment is merely schematic.

[0068] The oil and gas migration and accumulation segmentation groove dividing device provided in this embodiment includes:

[0069] A first processing unit is used to set model parameters based on seismic profiles and drilling permeability parameters to produce a first laboratory model and a second laboratory model for oil and gas migration and accumulation segmentation trough division;

[0070] A second processing unit is used to carry out oil filling observation based on the first laboratory model and the second laboratory model, and record the oil output of the first laboratory model and the second laboratory model;

[0071] The third processing unit is used to calculate the proportion of the final oil output of the first laboratory model and the second laboratory model to the total oil injection according to the oil output of the first laboratory model and the second laboratory model, and divide the volume of the source rock proportionally, and the volume boundary is the dividing groove position.

[0072] Embodiment 3:

[0073] This embodiment provides a processing device for implementing the method for dividing the oil and gas migration and accumulation segmentation grooves affected by the sand body provided in this embodiment 1. The processing device can be a processing device for a client, such as a mobile phone, a laptop computer, a tablet computer, a desktop computer, etc., to execute the method of embodiment 1.

[0074] The processing device includes a processor, a memory, a communication interface and a bus, and the processor, the memory and the communication interface are connected through the bus to complete mutual communication. The memory stores a computer program that can be run on the processor, and the processor executes the oil and gas migration and accumulation segmentation tank division method provided in this embodiment 1 when running the computer program.

[0075] Preferably, the memory may be a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk memory.

[0076] Preferably, the processor may be a central processing unit (CPU), a digital signal processor (DSP) or other general-purpose processors of various types, which are not limited here.

[0077] Embodiment 4:

[0078] The method for dividing oil and gas migration and accumulation grooves affected by sand bodies in this embodiment 1 can be specifically implemented as a computer program product. The computer program product may include a computer-readable storage medium carrying computer-readable program instructions for executing the method described in this embodiment 1.

[0079] Computer readable storage media can be tangible devices that hold and store instructions used by instruction execution devices. Computer readable storage media can be, for example, but not limited to, electronic storage devices, magnetic storage devices, optical storage devices, electromagnetic storage devices, semiconductor storage devices, or any combination thereof.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application 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 replace some or all of the technical features therein by equivalents; 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, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A method for dividing oil and gas migration and accumulation grooves affected by sand bodies, characterized in that: The following steps are involved: The model parameters are set based on the seismic profile and the drilling permeability parameters, and a first laboratory model containing sand bodies on one side and a second laboratory model containing no sand bodies on the other side are established; Conduct oil filling observation based on the first laboratory model and the second laboratory model, and record the oil output of the first laboratory model and the second laboratory model; According to the oil output of the first laboratory model and the second laboratory model, the proportion of the oil output of the first laboratory model and the second laboratory model to the total oil injection is calculated respectively, and the volume of the source rock is divided according to the proportion, and the volume boundary is the location of the dividing groove.

2. The method for dividing oil and gas migration and accumulation grooves according to claim 1, characterized in that: The "setting of model parameters based on seismic profiles and drilling permeability parameters to establish a first laboratory model containing sand bodies on one side and a second laboratory model containing no sand bodies on one side" is specifically: Select the seismic profile and convert it into a geological profile, and measure the length and height of the geological profile; Measure the length and height of the laboratory model mold, and determine the conversion ratio coefficient between the geological section and the laboratory model based on the length and height of the geological section; Statistical permeability parameters of each formation encountered by drilling; The geological profile is converted into a laboratory model according to a determined conversion ratio coefficient, and the formation permeability of the laboratory model is set according to the statistical permeability parameters of each formation. Then, the volume of the source rock of the laboratory model is measured, and a first laboratory model with sand body on one side and a second laboratory model without sand body on one side are established, and an oil outlet is set on both sides above the first laboratory model and the second laboratory model.

3. The method for dividing oil and gas migration and accumulation grooves according to claim 2, characterized in that: The "carrying out oil filling observation based on the first laboratory model and the second laboratory model, and recording the oil output of the first laboratory model and the second laboratory model" is specifically: injecting petroleum into the source rocks of the first laboratory model and the second laboratory model until the source rocks are saturated with petroleum; After the source rock is saturated with oil, oil injection continues, and the oil output from the oil outlets on both sides of the first laboratory model and the second laboratory model is recorded. When the sum of the oil output from the oil outlets on both sides is equal to the total oil injection amount, the injection of the first laboratory model and the second laboratory model is stopped.

4. The method for dividing oil and gas migration and accumulation grooves according to claim 3, characterized in that: The aforementioned "calculating the proportion of the oil output of the first laboratory model and the second laboratory model to the total oil injection volume according to the oil output of the first laboratory model and the second laboratory model, and dividing the volume of the source rock according to the proportion, and the volume boundary is the location of the dividing groove" is specifically: The proportion of the oil output from the oil outlets on both sides of the first laboratory model and the second laboratory model to the total oil injection volume is calculated by the following formula: a i =A i / B*100 In the formula, α is the ratio of the oil output to the total oil injection; A is the oil output of the oil outlet; B is the total oil injection; i is the first side or second side oil outlet; According to the proportion of the oil output from the oil outlets on both sides of the first laboratory model and the second laboratory model to the total oil injection, the volume of the source rock on both sides is divided, and the volume boundary between the two is the location of the dividing groove.

5. A device for dividing oil and gas migration and accumulation partition grooves under the influence of sand bodies, characterized in that: include: A first processing unit is used to set model parameters based on seismic profiles and drilling permeability parameters to establish a first laboratory model containing sand bodies on one side and a second laboratory model containing no sand bodies on one side; A second processing unit is used to carry out oil filling observation based on the first laboratory model and the second laboratory model, and record the oil output of the first laboratory model and the second laboratory model; The third processing unit is used to calculate the proportion of the final oil output of the first laboratory model and the second laboratory model to the total oil injection according to the oil output of the first laboratory model and the second laboratory model, and divide the volume of the source rock proportionally, and the volume boundary is the dividing groove position.

6. A computer-readable storage medium, characterized in that: A computer program is stored, and the computer program is executed by a processor to control the device where the processor is located to implement the steps of the method for dividing the oil and gas migration and accumulation segmentation grooves affected by the sand body as described in any one of claims 1 to 4.

7. A computer device, characterized in that: The invention comprises a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the method for dividing oil and gas migration and accumulation grooves affected by sand bodies described in any one of claims 1 to 4 are implemented.

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