Quantitative analysis method and system for relation between stratigraphic dip angle and oil and gas transportation and confluence amount

Abstract

The invention relates to a quantitative analysis method and system for the relation between a stratigraphic dip angle and oil and gas transportation and confluence amount. The method comprises the steps that a multi-angle laboratory model is established through seismic section conversion; carrying out oil filling observation on the multi-angle laboratory model to obtain oil outlet quantity data; according to the oil outlet quantity data, the oil outlet quantity proportion of the multi-angle laboratory model is calculated, and the oil outlet quantity proportion is obtained; and constructing a quantitative plate based on the ratio of the oil outlet quantity and the ratio of the stratigraphic dip angles of the multi-angle laboratory model to obtain a quantitative plate of the influence of the stratigraphic dip angles on the oil and gas transportation and confluence quantity. The quantitative research on the influence of the stratigraphic dip angle on the oil and gas transportation and confluence quantity is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas exploration and development, and in particular to a quantitative analysis method and system for the relationship between formation dip and oil and gas transport and convergence volume. Background Art

[0002] The process of oil and gas migration and accumulation follows the theory of fluid potential. Oil and gas migrate from areas of high to low potential. A greater fluid potential gradient favors oil and gas migration in the direction of the greater potential gradient, and oil and gas accumulate in areas of low potential that have the conditions for accumulation. Typically, the fluid potential for secondary oil and gas migration is primarily composed of buoyancy, hydrodynamic forces, and capillary resistance. These three forces determine the direction of the fluid potential gradient, and therefore the direction and accumulation locations of secondary oil and gas migration. Ignoring the effects of hydrodynamic forces, it is assumed that the driving force for secondary oil and gas migration is primarily buoyancy overcoming capillary resistance. Furthermore, when formation porosity and permeability remain constant, the direction and accumulation of oil and gas migration are controlled solely by formation dip. A greater dip results in greater oil and gas migration and accumulation.

[0003] Currently, the understanding of the impact of formation dip on the direction and convergence of oil and gas is still at the qualitative stage. It is believed that the greater the formation dip, the greater the impact of the formation on the migration and convergence of oil and gas. However, the impact of formation dip on the migration and convergence of oil and gas cannot be quantified. At the same time, formation dip varies greatly in different parts of the same oil and gas basin or depression, and the impact on the migration and convergence of oil and gas is also different. Therefore, it is impossible to determine the migration and convergence of oil and gas to formations with different formation dips in the same oil and gas basin or depression. Summary of the Invention

[0004] The present invention provides a quantitative analysis method and system for the relationship between formation dip and oil and gas transport and convergence volume, in order to solve the defects of the prior art.

[0005] The present invention provides a quantitative analysis method for the relationship between formation dip and oil and gas transport and confluence, comprising:

[0006] S1: Establishing a multi-angle laboratory model through seismic profile transformation;

[0007] S2: Conduct oil filling observations on the multi-angle laboratory model to obtain oil yield data;

[0008] S3: Calculating the oil yield ratio of the multi-angle laboratory model according to the oil yield data to obtain the oil yield ratio;

[0009] S4: A quantitative chart is constructed based on the oil production ratio and the formation dip ratio of the multi-angle laboratory model to obtain a quantitative chart of the impact of formation dip on oil and gas migration and convergence.

[0010] According to a quantitative analysis method for the relationship between formation dip and oil and gas migration and convergence provided by the present invention, step S1 further includes:

[0011] S11: converting the seismic profile into a geological profile to obtain geological profile parameters;

[0012] S12: determining a proportional coefficient according to the laboratory model mold size and the geological profile parameters to obtain a conversion proportional coefficient between the geological profile and the laboratory model;

[0013] S13: constructing a laboratory model based on the conversion ratio coefficient to obtain a multi-angle laboratory model.

[0014] According to a quantitative analysis method for the relationship between formation dip and oil and gas transport and collection volume provided by the present invention, the address profile parameters in step S11 include: length parameters and height parameters of the geological profile, and the conversion ratio coefficients in step S12 include: length conversion ratio coefficient and height conversion ratio coefficient.

[0015] According to a quantitative analysis method for the relationship between formation dip and oil and gas migration and convergence volume provided by the present invention, the length conversion ratio coefficient is 1 / 30000, and the height conversion ratio coefficient is 1 / 12000.

[0016] According to a quantitative analysis method for the relationship between formation dip and oil and gas transport and collection provided by the present invention, the multi-angle laboratory model in step S13 includes:

[0017] A first laboratory model, wherein the dip angle of the formation on the left side of the first laboratory model is 10° and the dip angle of the formation on the right side is 25°;

[0018] A second laboratory model, wherein the dip angle of the formation on the left side of the second laboratory model is 15° and the dip angle of the formation on the right side is 25°;

[0019] A third laboratory model, wherein the left formation dip angle of the third laboratory model is 25°, and the right formation dip angle is 25°;

[0020] A fourth laboratory model, wherein the dip angle of the formation on the left side of the fourth laboratory model is 35°, and the dip angle of the formation on the right side is 25°;

[0021] The fifth laboratory model has a formation dip angle of 40° on the left and a formation dip angle of 25° on the right.

[0022] According to a quantitative analysis method for the relationship between formation dip and oil and gas migration and convergence provided by the present invention, step S2 further includes:

[0023] S21: Performing oil saturation filling treatment into the source rocks of the multi-angle laboratory model until the source rocks are saturated;

[0024] S22: Based on the saturation state of the source rock, continue to inject oil and obtain the real-time oil output from the oil outlets on the left and right sides;

[0025] S23: When the sum of the oil outputs of the left and right oil outlets corresponding to the real-time oil output is equal to the total oil injection volume, the filling is stopped to obtain the oil output data.

[0026] According to a quantitative analysis method for the relationship between formation dip and oil and gas transport and collection provided by the present invention, the expression for the oil yield ratio in step S3 is:

[0027]

[0028] Where, i (i=1,2) is the oil outlet index of the laboratory model, a i is the ratio of the oil output of the ith oil outlet of the laboratory model to the total oil injection volume, A i is the oil output of the ith oil outlet of the laboratory model, and B is the current total oil injection volume.

[0029] According to a quantitative analysis method for the relationship between formation dip and oil and gas transport and collection provided by the present invention, step S4 further includes:

[0030] S41: Calculate the ratio of the formation dip angles on the left and right sides of the laboratory model to obtain the formation dip angle ratio;

[0031] S42: Correlating and mapping the oil production ratio with the formation dip ratio to obtain quantitative relationship data on the impact of the formation dip on the oil and gas transport and collection volume;

[0032] S43: Drawing a chart based on the quantitative relationship data to obtain a quantitative chart of the effect of formation dip on oil and gas migration and collection.

[0033] According to a quantitative analysis method for the relationship between formation dip and oil and gas transport and collection provided by the present invention, the expression of the formation dip ratio in step S41 is:

[0034]

[0035] Where β is the calculated formation dip ratio, C is the formation dip on the left side of the laboratory model, and D is the formation dip on the right side of the laboratory model.

[0036] The present invention further provides a quantitative analysis system for the relationship between formation dip and oil and gas transport and convergence, which is used to execute the quantitative analysis method for the relationship between formation dip and oil and gas transport and convergence as described in any one of the above items, comprising:

[0037] Building module: used to build multi-angle laboratory models through seismic profile conversion;

[0038] Acquisition module: used to collect the oil output during oil filling observation in the multi-angle laboratory model and obtain the oil output data;

[0039] Calculation module: used for calculating the oil yield ratio of the multi-angle laboratory model according to the oil yield data to obtain the oil yield ratio;

[0040] Construction module: used to construct a quantitative chart based on the oil production ratio and the formation dip ratio of the multi-angle laboratory model, and obtain a quantitative chart of the impact of formation dip on oil and gas migration and convergence.

[0041] The present invention provides a quantitative analysis method and system for the relationship between formation dip and oil and gas transport and collection volume. The technical feature of establishing a multi-angle experimental model through seismic profile conversion processing can accurately scale the actual geological structure to the laboratory scale, avoiding the problem that traditional qualitative analysis methods cannot quantify the degree of influence of formation dip, making the research results more operational and practical, providing a reliable physical simulation basis for oil and gas exploration, greatly reducing the blindness and risk of field exploration, and saving a lot of exploration costs and time investment.

[0042] The present invention has the technical feature of establishing five laboratory models containing different left-side formation dips, which can systematically compare and analyze the differences in oil and gas migration under different dip conditions, overcome the limitations of previous single-model research, provide more comprehensive and accurate data support, make the research conclusions more convincing and universal, provide an important reference for understanding the laws of oil and gas migration under different geological conditions, and significantly improve the scientific nature and accuracy of oil and gas exploration decisions; subsequently, oil filling observations and processing are carried out on multiple laboratory models to obtain oil output data from the oil outlets on the left and right sides of each laboratory model, realizing intuitive and visual monitoring of the oil and gas migration process, solving the technical problem that traditional theoretical analysis is difficult to obtain accurate data, providing a detailed experimental data basis for the study of oil and gas migration mechanism, greatly enhancing the credibility and application value of the research results, and effectively guiding the layer selection and drilling deployment in actual oil and gas exploration work; and subsequently, this invention The invention calculates and processes the oil production ratio based on the oil production data, and transforms complex geological phenomena into calculable and predictable numerical relationships through quantitative mathematical expressions, which completely changes the limitations of traditional qualitative judgments and lays a solid foundation for the accurate description of oil and gas migration laws, so that the oil and gas distribution ratio under different geological conditions can be accurately predicted, greatly improving the success rate and economic benefits of oil and gas exploration; finally, the invention constructs and processes quantitative maps based on the oil production ratio and the formation dip ratio, establishes an intuitive correspondence between the formation dip and the oil and gas migration volume, provides a simple and easy-to-use map-checking tool for exploration operations, significantly improves the convenience and practicality of field applications, reduces the workload of complex calculations, speeds up exploration decision-making, and ensures the accuracy of decisions, providing scientific and reliable technical support for oil and gas exploration area selection, and promoting the standardization and normalization of oil and gas exploration technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0044] Figure 1 A schematic flow chart of a quantitative analysis method for the relationship between formation dip and oil and gas transport and confluence provided by an embodiment of the present invention;

[0045] Figure 2 A schematic diagram of the structure of a quantitative analysis system for the relationship between formation dip and oil and gas transport and convergence provided by an embodiment of the present invention;

[0046] Figure 3 A quantitative diagram illustrating the effect of formation dip on oil and gas migration and recovery provided by an embodiment of the present invention.

[0047] Description of the drawings: 100, establishment module; 200, acquisition module; 300, calculation module; 400, construction module. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments, and they should not be understood as limitations on the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. In the description of the present invention, it should be understood that the terms used are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0049] The following describes embodiments of the present invention with reference to the accompanying drawings.

[0050] like Figure 1 As shown, the present invention provides a quantitative analysis method for the relationship between formation dip and oil and gas transport and confluence, comprising:

[0051] S1: Establish a multi-angle laboratory model through seismic profile transformation.

[0052] Wherein, step S1 further includes:

[0053] S11: converting the seismic profile into a geological profile to obtain geological profile parameters.

[0054] The address profile parameters in step S11 include: length parameters and height parameters of the geological profile.

[0055] Furthermore, the seismic profile, as a reflection wave data record of the underground geological structure, contains the depth information, dip information and rock type change characteristics of the stratum interface. The geological profile conversion process requires converting the seismic data in the time domain into geological structure data in the depth domain. The conversion algorithm adopts the velocity model interpolation method to multiply the seismic wave propagation time by the seismic wave velocity of the corresponding layer to obtain the true stratum depth. In the process of geological profile parameter extraction, the length parameter is obtained by measuring the horizontal distance of the seismic survey line, and the height parameter is calculated by the depth difference between the top and bottom interfaces of the stratum.

[0056] S12: determining a proportional coefficient according to the mold size of the laboratory model and the geological profile parameters, and obtaining a conversion proportional coefficient between the geological profile and the laboratory model.

[0057] The conversion ratio coefficient in step S12 includes: a length conversion ratio coefficient and a height conversion ratio coefficient.

[0058] Among them, the length conversion ratio coefficient is 1 / 30000, and the height conversion ratio coefficient is 1 / 12000.

[0059] Furthermore, the determination of the mold size of the laboratory model is based on the principle of physical similarity. The above-mentioned length conversion ratio coefficient 1 / 30000 means that 30000 meters in the actual geological profile corresponds to 1 meter in the laboratory model, and the height conversion ratio coefficient 1 / 12000 means that 12000 meters in the actual geological profile corresponds to 1 meter in the laboratory model.

[0060] S13: constructing a laboratory model based on the conversion ratio coefficient to obtain a multi-angle laboratory model.

[0061] The multi-angle laboratory model in step S13 includes:

[0062] The first laboratory model, the left side formation dip angle of the first laboratory model is 10°, and the right side formation dip angle is 25°; the second laboratory model, the left side formation dip angle of the second laboratory model is 15°, and the right side formation dip angle is 25°; the third laboratory model, the left side formation dip angle of the third laboratory model is 25°, and the right side formation dip angle is 25°; the fourth laboratory model, the left side formation dip angle of the fourth laboratory model is 35°, and the right side formation dip angle is 25°; the fifth laboratory model, the left side formation dip angle of the fifth laboratory model is 40°, and the right side formation dip angle is 25°.

[0063] Furthermore, in step S13, the geological profile is converted into a laboratory model according to the conversion ratio coefficient determined in the previous steps, and a first laboratory model with a right formation dip of 25° and a left formation dip of 10°, a second laboratory model with a left formation dip of 15°, a third laboratory model with a left formation dip of 25°, a fourth laboratory model with a left formation dip of 35°, and a fifth laboratory model with a left formation dip of 40° are established, and an oil outlet is set on the left and right sides above each laboratory model.

[0064] S2: Conduct oil filling observations on the multi-angle laboratory model to obtain oil yield data.

[0065] Furthermore, in step S2, the present invention conducts multi-angle laboratory model oil filling observations, aiming to obtain oil and gas migration and distribution data under different formation dip conditions through precisely controlled physical simulation experiments.

[0066] Wherein, step S2 further includes:

[0067] S21: Performing oil saturation filling treatment into the source rocks of the multi-angle laboratory model until the source rocks are saturated.

[0068] Since the source rock is the core part of the model that simulates oil and gas generation and initial migration under real geological conditions, it must first reach a fully saturated state to ensure the accuracy of subsequent experiments. Therefore, in step S21, the present invention first continuously injects oil into the source rock portion of each laboratory model until it can no longer absorb more oil. At this time, the pore space of the source rock is completely filled with oil. The criterion for forming a saturated state is that oil overflow begins to appear on the surface of the source rock when oil injection continues. This ensures that each model starts subsequent oil and gas migration experiments under the same initial conditions, eliminating systematic errors caused by uneven initial filling.

[0069] S22: Based on the saturation state of the source rock, oil injection is continued to obtain the real-time oil output from the oil outlets on the left and right sides.

[0070] In step S22, the present invention continues oil injection based on the saturated state of the source rock, simulating the dynamic process of continuous oil and gas generation and secondary migration under real geological conditions. Real-time oil production data is acquired by accurately measuring the cumulative oil production volume of the left and right outlets at different time points. The left and right outlets represent oil and gas migration pathways at different formation dip angles, respectively. Real-time monitoring and recording of oil production changes at each outlet reflects the migration and distribution patterns of oil and gas in formations with different dip angles.

[0071] S23: When the sum of the oil outputs of the left and right oil outlets corresponding to the real-time oil output is equal to the total oil injection volume, the filling is stopped to obtain the oil output data.

[0072] Furthermore, the aforementioned criterion for stopping injection is based on the principle of mass balance. When the sum of the oil output from the left and right outlets, corresponding to the real-time oil output, equals the total injected oil volume, the experimental system has reached dynamic equilibrium. At this point, any further injected oil flows completely out through both outlets and no longer accumulates within the model. The total injected oil volume refers to the total volume of oil injected after the source rock reaches saturation. The summed oil output refers to the sum of the cumulative oil output from the left and right outlets. The final oil output data includes the final cumulative oil output value for each laboratory model's left and right outlets.

[0073] S3: Calculate the oil yield ratio of the multi-angle laboratory model according to the oil yield data to obtain the oil yield ratio.

[0074] The expression of the oil output ratio in step S3 is:

[0075]

[0076] Where, i (i=1,2) is the oil outlet index of the laboratory model, a i is the ratio of the oil output of the ith oil outlet of the laboratory model to the total oil injection volume, A i is the oil output of the ith oil outlet of the laboratory model, and B is the current total oil injection volume.

[0077] Furthermore, the oil output ratio represents the relative ratio of the oil output of each oil outlet to the current total oil injection volume. The mathematical expression of the oil output ratio is shown above, where the oil outlet index is used to distinguish the left oil outlet from the right oil outlet. When i=1, it represents the left oil outlet, and when i=2, it represents the right oil outlet. i It refers to the total volume of oil outflow recorded at the outlet at the end of the experiment. It is derived from the timed measurement records during the experiment and reflects the absolute amount of oil and gas migrating in this direction under specific inclination conditions. i It is equal to the sum of the oil output from the left outlet and the oil output from the right outlet, representing the total volume of oil that continues to be injected after the source rock is saturated and eventually flows out through the outlet.

[0078] S4: A quantitative chart is constructed based on the oil production ratio and the formation dip ratio of the multi-angle laboratory model to obtain a quantitative chart of the impact of formation dip on oil and gas migration and convergence.

[0079] Wherein, step S4 further includes:

[0080] S41: Calculate the ratio of the formation dip angles on the left and right sides of the laboratory model to obtain the formation dip angle ratio.

[0081] The expression of the formation dip ratio in step S41 is:

[0082]

[0083] Where β is the calculated formation dip ratio, C is the formation dip on the left side of the laboratory model, and D is the formation dip on the right side of the laboratory model.

[0084] Furthermore, the above-mentioned formation dip ratio reflects the relative size difference of the formation dip on both sides of the laboratory model. In this embodiment, the C value is 10°, 15°, 25°, 35°, and 40° in the five laboratory models, respectively, and the D value is fixed at 25° in all models. The present invention realizes the systematic change control of the dip ratio through the experimental design of changing the C value while keeping the D value unchanged.

[0085] For β, when β is less than 1, it means that the dip angle of the left stratum is smaller than that of the right stratum; when β is equal to 1, it means that the dip angles of the strata on both sides are equal; when β is greater than 1, it means that the dip angle of the left stratum is greater than that of the right stratum. The value of β reflects the degree of difference in the dip angles on both sides.

[0086] S42: Correlating and mapping the oil production ratio with the formation dip ratio to obtain quantitative relationship data on the impact of the formation dip on the oil and gas transportation and collection volume.

[0087] Furthermore, the correlation mapping between oil yield ratio and formation dip ratio in step S42 of the present invention is a data analysis process that establishes a quantitative relationship between two independent variables. This correlation mapping uses the formation dip ratio of each laboratory model as the horizontal axis variable and the corresponding left and right oil yield ratios as the vertical axis variables, forming a data point distribution pattern in a two-dimensional coordinate system. Specifically, the data processing logic of the mapping analysis is based on the assumption of a causal relationship between the variables. Specifically, the formation dip ratio, as the independent variable, determines the direction and distribution of oil and gas migration, while the oil yield ratio, as the dependent variable, reflects the quantitative impact of dip changes on oil and gas convergence.

[0088] S43: Drawing a chart based on the quantitative relationship data to obtain a quantitative chart of the effect of formation dip on oil and gas migration and collection.

[0089] Furthermore, the drawing in step S43 converts the abstract numerical relationship into an intuitive visual graphical representation, which specifically includes coordinate system construction, data point drawing, and curve fitting. In a specific embodiment, during the coordinate system construction process, the horizontal axis represents the range of the formation dip angle ratio, and the vertical axis represents the range of the oil production ratio. During the data point drawing process, the dip angle ratios of the five laboratory models and the corresponding left and right oil production ratio data are marked in the coordinate system to form a discrete data point distribution. Each data point represents the oil and gas distribution state under specific dip angle conditions, and the curve fitting connects the discrete data points through mathematical interpolation methods to form a continuous relationship curve. The obtained curve reflects the continuous influence of the change in the formation dip angle ratio on the oil and gas transport and distribution.

[0090] like Figure 2 As shown, the present invention further provides a quantitative analysis system for the relationship between formation dip and oil and gas transport and convergence, which is used to perform a quantitative analysis method for the relationship between formation dip and oil and gas transport and convergence as described in any one of the above items, comprising:

[0091] Establishment module 100: used for establishing a multi-angle laboratory model through seismic profile transformation;

[0092] Acquisition module 200: used to collect the oil output during oil filling observation in a multi-angle laboratory model to obtain oil output data;

[0093] Calculation module 300: used to calculate the oil yield ratio of the multi-angle laboratory model based on the oil yield data to obtain the oil yield ratio;

[0094] Construction module 400: for constructing a quantitative chart based on the oil production ratio and the formation dip ratio of the multi-angle laboratory model, and obtaining a quantitative chart of the influence of formation dip on oil and gas migration and convergence.

[0095] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0096] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus the necessary general hardware platform, or of course, by hardware. Based on this understanding, the above technical solution, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute a quantitative analysis method for the relationship between formation dip and oil and gas transport and return volume as described in various embodiments or certain parts of the embodiments.

[0097] The following describes a quantitative analysis method and system for the relationship between formation dip and oil and gas transport and return volume according to the present invention in conjunction with specific embodiments.

[0098] Taking a two-dimensional seismic profile of a certain basin as an example, the seismic profile is first converted into a geological profile. The length and height of the geological profile are measured to be 24,000 m and 6,000 m, respectively. For the laboratory model developed in this embodiment, the length and height of the model mold are 80 cm and 50 cm, respectively. Based on the aforementioned length and height of the geological profile of 24,000 m and 6,000 m, the proportional coefficients of the length and height of the geological profile converted into the length and height of the laboratory model are determined to be 1 / 30,000 and 1 / 12,000, respectively.

[0099] Subsequently, the length and height of the geological profile were converted into laboratory models 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 first laboratory model with a left stratum dip of 10°, the second laboratory model with a left stratum dip of 15°, the third laboratory model with a left stratum dip of 25°, the fourth laboratory model with a left stratum dip of 35°, and the fifth laboratory model with a left stratum dip of 40° were established respectively. An oil outlet was set on the left and right sides above each laboratory model.

[0100] Subsequently, oil filling was carried out according to the process of the aforementioned step S2. After the source rock was saturated with oil, the oil output from the left and right oil outlets of the first laboratory model, the second laboratory model, the third laboratory model, the fourth laboratory model, and the fifth laboratory model was recorded. When the sum of the oil output from the oil outlets on both sides equaled the total oil injection at that moment, the filling was stopped. The oil output from the left and right oil outlets of the first laboratory model, the second laboratory model, the third laboratory model, the fourth laboratory model, and the fifth laboratory model are shown in Table 1 below.

[0101] Table 1 Statistics of oil output from the oil outlets on the left and right sides of each experimental model

[0102]

[0103]

[0104] After obtaining the oil output data of the oil outlets on the left and right sides of the laboratory model, calculate the oil output ratio. For example, in the first laboratory model, the oil output A1 of the left oil outlet is 0ml, and the oil output A2 of the right oil outlet is 94ml. At this moment, the total oil output B is 94ml. According to the formula, the oil output ratio a1 of the left oil outlet is 0%, and the oil output ratio a2 of the right oil outlet is 100%; in the second laboratory model, the oil output of the left oil outlet is 0ml, and the oil output of the right oil outlet is 102ml. At this moment, the total oil output is 102ml. According to the formula, the oil output ratio of the left oil outlet is 0%, and the oil output ratio of the right oil outlet is 100%; in the third laboratory model, the oil output of the left oil outlet is 35m 1. The oil output of the right oil outlet is 37ml. At this moment, the total oil output is 72ml. According to the formula, the oil output ratio of the left oil outlet is 49%, and the oil output ratio of the right oil outlet is 51%; in the fourth laboratory model, the oil output of the left oil outlet is 55ml, and the oil output of the right oil outlet is 0ml. At this moment, the total oil output is 55ml. According to the formula, the oil output ratio of the left oil outlet is 100%, and the oil output ratio of the right oil outlet is 0%; in the fifth laboratory model, the oil output of the left oil outlet is 56ml, and the oil output of the right oil outlet is 0ml. At this moment, the total oil output is 56ml. According to the formula, the oil output ratio of the left oil outlet is 100%, and the oil output ratio of the right oil outlet is 0%.

[0105] Subsequently, the ratio of the left and right stratum dips was calculated. According to the dip of the experimental model, the right stratum dip remained unchanged at 25°, and the left stratum dips of the first laboratory model, the second laboratory model, the third laboratory model, the fourth laboratory model, and the fifth laboratory model were 10°, 15°, 25°, 35°, and 40°, respectively. The dip ratio of the stratum was calculated according to the formula. The dip ratios of the left and right stratums of the first laboratory model, the second laboratory model, the third laboratory model, the fourth laboratory model, and the fifth laboratory model were 0.4, 0.6, 1.0, 1.4, and 1.6, respectively.

[0106] Finally, based on the oil production ratio and formation dip ratio, the data are shown in Table 2, and a quantitative chart of the influence of formation dip on oil and gas transport and return is established. Figure 3 As shown, the horizontal axis is the ratio of the formation inclination angle, and the vertical axis is the proportion of oil production. According to the chart, we can quantitatively study the amount of oil and gas transported to the formations with different inclination angles on both sides.

[0107] Table 2 Statistics of oil production ratio and formation dip ratio

[0108] Formation dip ratio Left side oil output ratio Right side oil output ratio 0.4 0 1 0.6 0 1 1 0.49 0.51 1.4 1 0 1.6 1 0

[0109] The present invention provides a quantitative analysis method and system for the relationship between formation dip and oil and gas transport and convergence volume, and proposes a research method for the influence of formation dip on oil and gas transport and convergence volume, which solves the problem that the understanding of the influence of formation dip on oil and gas migration direction and convergence volume is basically at the qualitative judgment stage, and it is impossible to judge the amount of oil and gas transported and converged to strata with different formation dips in the same oil and gas basin or depression. The research method for the influence of formation dip on oil and gas transport and convergence volume disclosed by the present invention is based on a laboratory model method, which quantitatively studies the influence of formation dip on oil and gas transport and convergence volume, and then quantitatively studies the transport and convergence volume of oil and gas to strata with different dips, serving the decision-making of exploration area selection.

[0110] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. 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 replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A quantitative analysis method for the relationship between formation dip and oil and gas transport and confluence, characterized in that: include: S1: Establishing a multi-angle laboratory model through seismic profile transformation; S2: Conduct oil filling observations on the multi-angle laboratory model to obtain oil yield data; S3: Calculating the oil yield ratio of the multi-angle laboratory model according to the oil yield data to obtain the oil yield ratio; S4: A quantitative chart is constructed based on the oil production ratio and the formation dip ratio of the multi-angle laboratory model to obtain a quantitative chart of the impact of formation dip on oil and gas migration and convergence.

2. The quantitative analysis method for the relationship between formation dip and oil and gas transport and return according to claim 1, characterized in that: Step S1 further comprises: S11: converting the seismic profile into a geological profile to obtain geological profile parameters; S12: determining a proportional coefficient according to the laboratory model mold size and the geological profile parameters to obtain a conversion proportional coefficient between the geological profile and the laboratory model; S13: constructing a laboratory model based on the conversion ratio coefficient to obtain a multi-angle laboratory model.

3. The quantitative analysis method for the relationship between formation dip and oil and gas transport and return according to claim 2, characterized in that: The address profile parameters in step S11 include: a length parameter and a height parameter of the geological profile, and the conversion ratio coefficient in step S12 includes: a length conversion ratio coefficient and a height conversion ratio coefficient.

4. The quantitative analysis method for the relationship between formation dip and oil and gas transport and return according to claim 3, characterized in that: The length conversion ratio coefficient is 1 / 30000, and the height conversion ratio coefficient is 1 / 12000.

5. The quantitative analysis method for the relationship between formation dip and oil and gas transport and return according to claim 2, characterized in that: The multi-angle laboratory model in step S13 includes: A first laboratory model, wherein the dip angle of the formation on the left side of the first laboratory model is 10° and the dip angle of the formation on the right side is 25°; A second laboratory model, wherein the dip angle of the formation on the left side of the second laboratory model is 15° and the dip angle of the formation on the right side is 25°; A third laboratory model, wherein the left formation dip angle of the third laboratory model is 25°, and the right formation dip angle is 25°; A fourth laboratory model, wherein the dip angle of the formation on the left side of the fourth laboratory model is 35°, and the dip angle of the formation on the right side is 25°; The fifth laboratory model has a formation dip angle of 40° on the left and a formation dip angle of 25° on the right.

6. The quantitative analysis method for the relationship between formation dip and oil and gas transport and confluence according to claim 1, characterized in that: Step S2 further comprises: S21: Performing oil saturation filling treatment into the source rocks of the multi-angle laboratory model until the source rocks are saturated; S22: Based on the saturation state of the source rock, continue to inject oil and obtain the real-time oil output from the oil outlets on the left and right sides; S23: When the sum of the oil outputs of the left and right oil outlets corresponding to the real-time oil output is equal to the total oil injection volume, the filling is stopped to obtain the oil output data.

7. The quantitative analysis method for the relationship between formation dip and oil and gas transport and return according to claim 1, characterized in that: The expression of the oil output ratio in step S3 is: Where, i (i=1,2) is the oil outlet index of the laboratory model, a i is the ratio of the oil output of the ith oil outlet of the laboratory model to the total oil injection volume, A i is the oil output of the ith oil outlet of the laboratory model, and B is the current total oil injection volume.

8. The quantitative analysis method for the relationship between formation dip and oil and gas transport and return according to claim 1, characterized in that: Step S4 further comprises: S41: Calculate the ratio of the formation dip angles on the left and right sides of the laboratory model to obtain the formation dip angle ratio; S42: Correlating and mapping the oil production ratio with the formation dip ratio to obtain quantitative relationship data on the impact of the formation dip on the oil and gas transport and collection volume; S43: Drawing a chart based on the quantitative relationship data to obtain a quantitative chart of the effect of formation dip on oil and gas migration and collection.

9. The quantitative analysis method for the relationship between formation dip and oil and gas transport and return according to claim 8, characterized in that: The expression of the formation dip ratio in step S41 is: Where β is the calculated formation dip ratio, C is the formation dip on the left side of the laboratory model, and D is the formation dip on the right side of the laboratory model.

10. A quantitative analysis system for the relationship between formation dip and oil and gas transport and convergence, used to execute the quantitative analysis method for the relationship between formation dip and oil and gas transport and convergence according to any one of claims 1 to 9, characterized in that: include: Building module: used to build multi-angle laboratory models through seismic profile conversion; Acquisition module: used to collect the oil output during oil filling observation in the multi-angle laboratory model and obtain the oil output data; Calculation module: used for calculating the oil yield ratio of the multi-angle laboratory model according to the oil yield data to obtain the oil yield ratio; Construction module: used to construct a quantitative chart based on the oil production ratio and the formation dip ratio of the multi-angle laboratory model, and obtain a quantitative chart of the impact of formation dip on oil and gas migration and convergence.

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