Method and device for determining single-well production reserves in straight-flat combined development well area

Abstract

The invention discloses a method and a device for determining single-well production reserves in a straight-flat combined development well area. The method comprises the following steps: constructing virtual well points of a horizontal well in a corresponding small layer according to well trajectory data, perforation data and fracturing data of the horizontal well in a well area; for each small layer, determining a control range of a virtual well point and a vertical well point in the small layer, performing correction by using a fault line and a well region boundary line, and determining production reserves in the small layer according to the area of the well point control range; splitting the production reserves of the well points of the water wells in the small layer to the production reserves of the well points of the adjacent communicated oil wells; and the sum of the production reserves of the virtual well points of the horizontal well in the corresponding small layers is determined as the single-well production reserves of the horizontal well, and the sum of the production reserves of the vertical well in the drilling encountering small layers is determined as the single-well production reserves of the vertical well. The method has the advantages of simple required parameters, automatic calculation, no need of relying on experiences of engineers, wide application range and high determination accuracy, and can quickly determine the single-well production reserves in the straight-flat combined development well area.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas field development, and in particular to a method and device for determining the producing reserves of a single well in a straight and horizontal combined development well area. Background Art

[0002] The abundance and thickness of the grape flower oil layer outside the oil field are low. With the continuous development of the oil field, the grade of unused reserves has deteriorated year by year, and the difficulty of effective use has increased year by year. Under the condition of certain production capacity, the investment recovery period of horizontal well-vertical well joint development is shorter than that of vertical well development. According to the distribution of oil layers, conventional or stepped horizontal wells are mostly used. There are also problems such as small scale of oil layer sand body development, complex fault distribution, and uneven distribution of well network density outside the oil field, which makes it difficult to evaluate the used reserves.

[0003] Accurately evaluating the reserves produced by a single well is the basis for subsequent evaluation of the degree of reserve production and the potential of remaining oil. At present, the main methods for calculating the reserves produced by a single well include the water drive characteristic curve method, the production decline method, the numerical simulation method and the volumetric method. Summary of the invention

[0004] The inventors found that the current calculation methods of single well production reserves have certain limitations. The water drive characteristic curve method only uses dynamic data, does not consider the static parameters of the reservoir, and cannot effectively calculate the rolling development block; the production decline method is suitable for oil and gas fields that have entered the decline stage and have a long decline history, but not for blocks with a short production time; the parameters required by the numerical simulation method are uncertain and the historical matching has multiple solutions, so the applicability is poor; the traditional volumetric method has problems such as relying on the experience of engineers, slow speed, and low accuracy when calculating the single well production reserves in the straight and flat joint development well area. Therefore, it is urgent to establish a more effective method for calculating the single well production reserves in the straight and flat joint development well area to quickly evaluate the reserve production status of vertical and horizontal wells in the straight and flat joint development well area, and lay the foundation for the next step of potential analysis and countermeasure adjustment.

[0005] In order to at least partially solve the technical problems existing in the prior art, the inventors have made the present invention, and through a specific implementation method, provide a method and device for determining the reserves of a single well in a straight-horizontal combined development well area, which can quickly and reasonably determine the reserves of a single well in a straight-horizontal combined development well area.

[0006] In a first aspect, an embodiment of the present invention provides a method for determining the producing reserves of a single well in a vertical and horizontal joint development well area, comprising:

[0007] According to the well trajectory data and perforation data of the horizontal wells in the vertical and horizontal joint development well area, the virtual well points of the horizontal wells in the corresponding small layers are constructed;

[0008] For each sub-layer, determine the control range of virtual well points and vertical well points in the sub-layer, and determine the produced reserves in the sub-layer according to the area of ​​the well point control range;

[0009] The sum of the producing reserves of each virtual well point of the horizontal well in the corresponding sub-layer is determined as the producing reserves of the single well of the horizontal well, and the sum of the producing reserves of the vertical well in the drilled sub-layer is determined as the producing reserves of the single well of the vertical well.

[0010] In a second aspect, an embodiment of the present invention provides a device for determining the producing reserves of a single well in a vertical and horizontal joint development well area, comprising:

[0011] The module for constructing virtual well points of horizontal wells is used to construct virtual well points of horizontal wells in corresponding sublayers according to the well trajectory data and perforation data of horizontal wells in the vertical and horizontal joint development well area;

[0012] The module for determining the produced reserves of well points in the sub-layer is used to determine the control range of virtual well points and vertical well points in the sub-layer for each sub-layer, and determine the produced reserves in the sub-layer according to the area of ​​the well point control range;

[0013] The producing reserves determination module is used to determine the sum of the producing reserves of each virtual well point of the horizontal well in the corresponding sub-layer as the single well producing reserves of the horizontal well, and to determine the sum of the producing reserves of the vertical well in the drilled sub-layer as the single well producing reserves of the vertical well.

[0014] In a third aspect, an embodiment of the present invention provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and when the computer executable instructions are executed by a processor, the above-mentioned method for determining the reserves of a single well in a vertical and horizontal joint development well area is implemented.

[0015] In a fourth aspect, an embodiment of the present disclosure provides a server, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method for determining the reserves of a single well in a vertical-horizontal joint development well area is implemented.

[0016] The beneficial effects of the above technical solution provided by the embodiment of the present invention include at least:

[0017] The method for determining the produced reserves of a single well in a straight-horizontal joint development well area provided by the embodiment of the present invention constructs a virtual well point of the horizontal well in the corresponding sublayer according to the well trajectory data of the horizontal well in the straight-horizontal joint development well area and the perforation data in the production dynamic data; for each sublayer, the control range of the virtual well point and the vertical well point in the sublayer is determined, and the produced reserves in the sublayer are determined according to the area of ​​the well point control range; finally, the produced reserves of a single well are obtained by the summation method. Both static data and dynamic data are considered in the determination process, and no fitting is required, which has good applicability; at the same time, this method overcomes the limitations of other methods such as relying on engineer experience and taking a long time, and can quickly and reasonably calculate the produced reserves of a single well in a straight-horizontal joint development well area, providing a basis for the formulation of subsequent development adjustment plans and the potential of remaining oil.

[0018] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings.

[0019] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 It is a flow chart of a method for determining the producing reserves of a single well in a straight-horizontal joint development well area in Embodiment 1 of the present invention;

[0022] Figure 2 This is a schematic diagram of the perforation section and fracturing position of a conventional horizontal well in Example 1 of the present invention;

[0023] Figure 3 A schematic diagram of virtual well points of a conventional horizontal well that is perforated and fractured for production in the first embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of perforation and fracturing of a stepped horizontal well in Example 1 of the present invention;

[0025] Figure 5 A schematic diagram of virtual well points of a stepped horizontal well put into production by perforation and fracturing in the first embodiment of the present invention;

[0026] Figure 6 This is a specific implementation flow chart of determining the control range of a well point using the Delaunay triangulation method in the first embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of processing a fault line as a boundary line of a single well control area in Embodiment 1 of the present invention;

[0028] Figure 8 It is a schematic diagram of the well point control range and the oil and water well inter-well producing reserve splitting of the straight and horizontal joint development well area in the first embodiment of the present invention;

[0029] Fig. 9 It is a schematic diagram of the structure of a device for determining the producing reserves of a single well in a straight-horizontal joint development well area in an embodiment of the present invention. DETAILED DESCRIPTION

[0030] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0031] It should be understood that the terms described in the present invention are only for describing special embodiments and are not intended to limit the present invention. In addition, for the numerical range in the present invention, it should be understood that each intermediate value between the upper and lower limits of the scope is also specifically disclosed. Each smaller range between the intermediate value in any stated value or stated range and any other stated value or intermediate value in the described range is also included in the present invention. The upper and lower limits of these smaller ranges can be independently included or excluded in the scope.

[0032] Unless otherwise indicated, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which the invention belongs. Although the present invention describes only preferred methods and materials, any methods and materials similar or equivalent to those described herein may also be used in the implementation or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and / or materials related to the documents. In the event of a conflict with any incorporated document, the content of this specification shall prevail.

[0033] Example

[0034] An embodiment of the present invention provides a method for determining the producing reserves of a single well in a vertical and horizontal joint development well area. First, the small layer data of a single well in the vertical and horizontal joint development wells, the perforation length and number of layer sections of the vertical wells, the well trajectory of the horizontal wells, the well type of the horizontal wells, the length of the oil layer encountered by the horizontal wells, the perforation length of the horizontal wells, the top and bottom depths of the perforation sections of the horizontal wells, the fracturing position and time and other data are collected, and the relevant data of the horizontal wells are sorted out as shown in Table 1.

[0035] Table 1 Basic data collection table required for determining the production reserves

[0036]

[0037] Based on the above data, the process of determining the single well producing reserves is as follows: Figure 1 As shown, the following steps are included:

[0038] Step S11: construct virtual well points of the horizontal wells in the corresponding sublayers according to the well trajectory data and perforation data of the horizontal wells in the straight-horizontal joint development well area.

[0039] Horizontal wells generally include conventional horizontal wells and stepped horizontal wells. Stepped horizontal wells are step-drilled, and different horizontal sections encounter different sublayers. The embodiments of the present invention use different virtual well point construction methods according to the different perforation production or fracturing production. Horizontal wells generally adopt perforation production measures, and on this basis, fracturing production measures may be further implemented. Constructing virtual well points of conventional horizontal wells and stepped horizontal wells with perforation production may include, according to the well trajectory data of the horizontal well, converting the top and bottom depths of each perforation section in the perforation data into corresponding coordinate points in the drilled sublayer, and using each coordinate point as a virtual well point of the horizontal well in the drilled sublayer.

[0040] Specifically, according to the well trajectory data and the top depth of the perforation section, the coordinates of the top of the perforation section can be located, and then its projection point on the drilled small layer is taken as a virtual well point; according to the well trajectory data and the bottom depth of the perforation section, the coordinates of the bottom of the perforation section can be located, and then its projection point on the drilled small layer is taken as another virtual well point.

[0041] If the distance between the coordinate points corresponding to the top and bottom depths of the same perforation section is not less than twice the average producing radius of the well points in the straight-horizontal joint development well area, a virtual well point is added on the line connecting the corresponding two virtual well points.

[0042] Furthermore, a virtual well point may be added at the midpoint between two virtual well points.

[0043] The average utilization radius of the well point can be calculated based on the average oil leakage area of ​​the straight and flat joint development well area, or it can be set manually.

[0044] In some embodiments, if the horizontal well is put into production by fracturing, in addition to establishing the corresponding virtual well points based on its perforation data as described above, it also includes judging whether the perforation section has a position overlapping with the fracturing position based on its fracturing data and perforation data; if so, there is no need to add any more virtual well points; if not, it is equivalent to fracturing the open hole section of the horizontal well, and adding a virtual well point at the fracturing position of this sublayer.

[0045] The local sublayer here refers to the sublayer encountered in the horizontal section. According to the well trajectory data and the fracturing position, the coordinates of the fracturing position can be located, and then its projection point in the local sublayer (drilled sublayer) is taken as a virtual well point.

[0046] The cracks produced by fracturing often have a large range, connecting multiple adjacent sublayers. Therefore, in some embodiments, it can also include: if it is determined based on the height of the cracks produced by fracturing that in addition to the sublayer in question, the non-sublayer is also penetrated, that is, the reserves of the non-sublayer are actively used, determining the corresponding position of the fracturing position in the non-sublayer; judging whether the perforation positions of other horizontal wells in the non-sublayer coincide with the corresponding position; if so, there is no need to add a virtual well point in the non-sublayer; if not, adding a virtual well point at the corresponding position in the non-sublayer. Specifically, based on the well trajectory data and the fracturing position, the coordinates of the projection point of the fracturing position in the non-sublayer can be located as a virtual well point.

[0047] See also Figure 2 Schematic diagram of the perforation section and fracturing position of a conventional horizontal well; Figure 3 Schematic diagram of virtual well points for a conventional horizontal well that is perforated and fractured and put into production; Figure 4 Schematic diagram of perforation and fracturing of stepped horizontal wells; Figure 5 Schematic diagram of virtual well points for perforated and fractured stepped horizontal wells.

[0048] Step S12: for each sub-layer, determine the control range of the virtual well points and the vertical well points in the sub-layer, and determine the producing reserves in the sub-layer according to the area of ​​the well point control range.

[0049] According to the average producing radius of the well point, the control range of the virtual well point and the vertical well point in the small layer is determined by using the Delaunay triangulation method. Figure 6 As shown, the following steps are included:

[0050] Step S61: Input data file.

[0051] Step S62: Determine the data format.

[0052] Step S63: Automatic matching, unit checking and dimension unification.

[0053] Step S64: Construct a super triangle that includes all well points and put them into the triangle linked list.

[0054] Step S65: Insert the well points into the Delaunay triangle in sequence.

[0055] Find the triangle whose circumcircle contains the insertion point in the triangle list, delete the common edges of the affected triangles, and connect all the vertices of the triangles affected by the insertion, thus completing the insertion of a point in the Delaunay triangle list.

[0056] Step S66: Optimize the newly formed triangle and put it into the triangle linked list.

[0057] The newly formed local triangles are optimized according to the optimization criteria, and the formed triangles are placed in the Delaunay triangle list.

[0058] Step S67: Determine whether all well points are completed.

[0059] If yes, execute step S68; if no, return to execute step S65.

[0060] Step S68: Calculate the centroid of each triangle obtained by the triangulation method.

[0061] Step S69: Connect the centroids of the triangles connected to each well point to form a polygon corresponding to the control range of each well point.

[0062] In some embodiments, after the control range of virtual well points and vertical well points in the sub-layer is determined by using the Delaunay triangulation method, it can also include correcting the well point control range using the fault lines and well area boundary lines in the sub-layer.

[0063] If the distance between the well point and the fault line or the well area boundary line is less than the average production radius, the fault and the well area boundary line are used as the boundary line of the well point control range; if the distance between the well point and the fault line or the well area boundary line is greater than the average production radius, the average production radius distance is extrapolated as the control boundary. Figure 7 shown.

[0064] In some embodiments, based on the area of ​​the well point control range, the produced reserves in the small layer can be determined by the following formula:

[0065] N c =100AhφS o ρ o / B oi

[0066] In the above formula, N c To use reserves, 10 4 t; A is the area of ​​the well point control range, km 2 ; h is the effective thickness, m; φ is the effective porosity, %; S o is the original oil saturation, %; ρ o is the density of ground degassed crude oil, t / m 3 ; B oi is the volume coefficient of formation crude oil and is dimensionless.

[0067] Since horizontal wells are usually oil wells, vertical wells may be oil wells or water injection wells, the vertical well points are oil well points or water well points, and the virtual well points are oil well points. In some embodiments, after determining the produced reserves in the sub-layer according to the area of ​​the well point control range, it can also include splitting the produced reserves of the water well points in the sub-layer into the produced reserves of the adjacent connected oil well points.

[0068] Specifically, two well points are adjacent and connected, which means that there is an overlapping portion between the boundaries of the control ranges of the two well points.

[0069] The method for splitting the produced reserves of a water well point may include determining the produced reserves splitting amount based on the control range of the water well point in the sub-layer and the control range of the adjacent connected oil well point; splitting the splitting amount of the produced reserves of the water well point into the produced reserves of the adjacent connected oil well point.

[0070] See also Figure 8 As shown in the figure, it is a well point distribution map of a certain layer. In addition to the marked water well points, B1 is also a water well point, and other virtual well points are oil well points. The water well point B1 is connected with the surrounding virtual well points A1, A2, A3, A4 and A5, so the corresponding part of the produced reserves of B1 in this layer is split into the produced reserves of A1, A2, A3, A4 and A5 respectively. Taking the virtual well point A3 as an example, the produced reserves of B1 corresponding to the overlapping part of the control range of well point A3 and the control range of well point B1 (the produced reserves corresponding to the shaded part) are determined as the produced reserves splitting amount, and split into the produced reserves of well point A3.

[0071] Step S13: The sum of the producing reserves of each virtual well point of the horizontal well in the corresponding sub-layer is determined as the producing reserves of the single well of the horizontal well, and the sum of the producing reserves of the vertical well in the drilled sub-layer is determined as the producing reserves of the single well of the vertical well.

[0072] The main factors affecting the production of perforated wells are the position and length of the perforation section, and only the reserves produced by the perforated layer are considered. The main factors affecting the production of fracturing wells are the fracturing position and fracturing layer, and the reserves produced by all fracturing layers must be considered. See Table 2 for the calculation results of the reserves produced by a single well in a well area.

[0073] Table 2 Calculation results of single well production reserves in the Zhiping joint development well area

[0074]

[0075] In some embodiments, it may also include determining the sum of the single well producing reserves of each horizontal well and vertical well in the vertical and horizontal joint development well area as the block producing reserves of the vertical and horizontal joint development well area.

[0076] The method for determining the produced reserves of a single well in a straight-horizontal joint development well area provided by the embodiment of the present invention constructs a virtual well point of the horizontal well in the corresponding sublayer according to the well trajectory data of the horizontal well in the straight-horizontal joint development well area and the perforation data in the production dynamic data; for each sublayer, the control range of the virtual well point and the vertical well point in the sublayer is determined, and the produced reserves in the sublayer are determined according to the area of ​​the well point control range; finally, the produced reserves of a single well are obtained by the summation method. Both static data and dynamic data are considered in the determination process, and no fitting is required, which has good applicability; at the same time, this method overcomes the limitations of other methods such as relying on engineer experience and taking a long time, and can quickly and reasonably calculate the produced reserves of a single well in a straight-horizontal joint development well area, providing a basis for the formulation of subsequent development adjustment plans and the potential of remaining oil.

[0077] In some embodiments, if a perforation section is plugged or a horizontal well is subjected to new perforation measures or fracturing measures at a certain point in time, the above steps are re-executed in response to the updated perforation data and / or fracturing data received, and the single well production reserves of each well and the production reserves of the entire block are re-determined.

[0078] Based on the inventive concept of the present invention, an embodiment of the present invention further provides a device for determining the producing reserves of a single well in a straight-horizontal joint development well area. The structure of the device is as follows: Fig. 9 As shown, including:

[0079] A horizontal well virtual well point construction module 91 is used to construct a virtual well point of a horizontal well in a corresponding sublayer according to the well trajectory data and perforation data of the horizontal well in the straight-horizontal joint development well area;

[0080] The module 92 for determining the produced reserves of well points in the sub-layer is used to determine the control range of the virtual well points and the vertical well points in the sub-layer for each sub-layer, and to determine the produced reserves in the sub-layer according to the area of ​​the well point control range;

[0081] The producing reserves determination module 93 is used to determine the sum of the producing reserves of each virtual well point of the horizontal well in the corresponding sublayer as the producing reserves of the single well of the horizontal well, and to determine the sum of the producing reserves of the vertical well in the drilled sublayer as the producing reserves of the single well of the vertical well.

[0082] In some embodiments, the horizontal well virtual well point construction module 91, according to the well trajectory data and perforation data of the horizontal well in the straight-horizontal joint development well area, constructs the virtual well point of the horizontal well in the corresponding sublayer, for:

[0083] According to the well trajectory data of the horizontal wells in the vertical and horizontal joint development well area, the top and bottom depths of each perforation section in the perforation data are converted into corresponding coordinate points in the drilled small layer, and each coordinate point is used as a virtual well point of the horizontal well in the drilled small layer.

[0084] In some embodiments, the horizontal well virtual well point construction module 91 is further used for:

[0085] If the distance between the coordinate points corresponding to the top and bottom depths of the same perforation section is not less than twice the average producing radius of the well points in the straight-horizontal joint development well area, a virtual well point is added on the line connecting the corresponding two virtual well points.

[0086] In some embodiments, the horizontal well virtual well point construction module 91 is further used for:

[0087] If the horizontal well is put into production by fracturing, it is determined whether the perforation section has a position that overlaps with the fracturing position based on the fracturing data and the perforation data; if not, a virtual well point is added at the fracturing position of the sublayer.

[0088] In some embodiments, the horizontal well virtual well point construction module 91 is further used for:

[0089] If it is determined according to the height of the fractures generated by fracturing that in addition to the current sublayer, a non-sublayer is also penetrated, the fracturing position is determined at the corresponding position of the non-sublayer; determine whether the perforation positions of other horizontal wells in the non-sublayer coincide with the corresponding position; if not, add a virtual well point at the corresponding position of the non-sublayer.

[0090] In some embodiments, the module 92 for determining the reserves produced by well points in a small layer, the control range of determining the virtual well points and the vertical well points in the small layer, is used to:

[0091] According to the average producing radius of the well points in the vertical and horizontal joint development well area, the control range of the virtual well points and the vertical well points in the small layer is determined by using the Delaunay triangulation method.

[0092] In some embodiments, the module 92 for determining the reserves produced by well points in the sub-layer, after determining the control range of the virtual well points and the vertical well points in the sub-layer by using the Delaunay triangulation method, is also used to:

[0093] The well point control range is corrected using the fault lines within the sublayer and the well area boundary lines.

[0094] The vertical well point is an oil well point or a water well point, and the virtual well point is an oil well point. In some embodiments, the well point producing reserve determination module 92 in the small layer, after determining the producing reserve in the small layer according to the area of ​​the well point control range, is also used to:

[0095] The producing reserves of the water well points in the small layer are split into the producing reserves of the adjacent connected oil well points.

[0096] In some embodiments, the producing reserves determination module 92 of the well point in the sub-layer, which splits the producing reserves of the water well point in the sub-layer into the producing reserves of the adjacent connected oil well points, is used to:

[0097] The produced reserves splitting component is determined according to the control range of the water well point in the small layer and the control range of the adjacent connected oil well point; the splitting component of the produced reserves of the water well point is split into the produced reserves of the adjacent connected oil well point.

[0098] In some embodiments, the module 92 for determining the produced reserves of the well points in the sub-layer, which determines the produced reserves in the sub-layer according to the area of ​​the well point control range, is used to:

[0099] According to the area of ​​the well point control range, the producing reserves in the small layer are determined by the following formula:

[0100] N c =100AhφS o ρ o / B oi

[0101] In the above formula, N c is the produced reserves, A is the area of ​​the well point control range, h is the effective thickness, φ is the effective porosity, S o is the initial oil saturation, ρ o is the density of ground degassed crude oil, B oi is the volume coefficient of formation crude oil.

[0102] In some embodiments, the reserve utilization determination module 93 is further configured to:

[0103] The sum of the single well producing reserves of each horizontal well and vertical well in the vertical and horizontal combined development well area is determined as the block producing reserves of the vertical and horizontal combined development well area.

[0104] In some embodiments, the horizontal well virtual well point construction module 91 is further used for:

[0105] In response to the received updated perforation data and / or fracturing data, the process returns to execute the process of constructing virtual well points of the horizontal wells in the corresponding sublayers according to the well trajectory data and perforation data of the horizontal wells in the straight-horizontal joint development well area.

[0106] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0107] Based on the inventive concept of the present invention, an embodiment of the present invention further provides a computer storage medium, in which computer executable instructions are stored. When the computer executable instructions are executed by a processor, the above-mentioned method for determining the reserves of a single well in a straight-horizontal joint development well area is implemented.

[0108] Based on the inventive concept of the present invention, an embodiment of the present invention also provides a server, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method for determining the producing reserves of a single well in a straight-horizontal joint development well area is implemented.

[0109] Unless otherwise specifically stated, terms such as processing, computing, calculating, determining, displaying, etc. may refer to the actions and / or processes of one or more processing or computing systems, or similar devices, which operate and convert data represented as physical (e.g., electronic) quantities within registers or memories of a processing system into other data similarly represented as physical quantities within memories, registers, or other such information storage, transmission, or display devices of the processing system. Information and signals may be represented using any of a variety of different techniques and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips mentioned throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, light fields or particles, or any combination thereof.

[0110] It should be understood that the specific order or hierarchy of steps in the disclosed process is an example of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of steps in the process can be rearranged without departing from the scope of protection of the present disclosure. The attached method claims present the elements of the various steps in an exemplary order and are not intended to be limited to the specific order or hierarchy described.

[0111] In the above detailed description, various features are grouped together in a single embodiment to simplify the disclosure. This method of disclosure should not be interpreted as reflecting an intention that an embodiment of the claimed subject matter requires more features than those set forth in each claim. On the contrary, as reflected in the appended claims, the invention is in a state of having less than all the features of the disclosed individual embodiments. Therefore, the appended claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.

[0112] Those skilled in the art will also appreciate that the various illustrative logic blocks, modules, circuits, and algorithmic steps described in conjunction with the embodiments herein can all be implemented as electronic hardware, computer software, or a combination thereof. In order to clearly illustrate the interchangeability between hardware and software, various illustrative components, blocks, modules, circuits, and steps are generally described above around their functions. Whether such functions are implemented as hardware or software depends on specific applications and the design constraints imposed on the entire system. A skilled person can implement the described functions in an alternative manner for each specific application, but such implementation decisions should not be interpreted as departing from the scope of protection of the present disclosure.

[0113] The steps of the method or algorithm described in conjunction with the embodiments herein may be directly embodied as hardware, a software module executed by a processor, or a combination thereof. The software module may be located in a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, a register, a hard disk, a mobile disk, a CD-ROM, or any other form of storage medium well known in the art. An exemplary storage medium is connected to the processor so that the processor can read information from the storage medium and can write information to the storage medium. Of course, the storage medium may also be an integral part of the processor. The processor and the storage medium may be located in an ASIC. The ASIC may be located in a user terminal. Of course, the processor and the storage medium may also be present in a user terminal as discrete components.

[0114] For software implementation, the techniques described in this application can be implemented with modules (e.g., procedures, functions, etc.) that perform the functions described in this application. These software codes can be stored in a memory unit and executed by a processor. The memory unit can be implemented within the processor or outside the processor. In the latter case, it is coupled to the processor in a communication manner via various means, which are well known in the art.

[0115] The above description includes examples of one or more embodiments. Of course, it is impossible to describe all possible combinations of components or methods for the purpose of describing the above embodiments, but it should be recognized by those skilled in the art that the various embodiments may be further combined and arranged. Therefore, the embodiments described herein are intended to cover all such changes, modifications and variations that fall within the scope of protection of the appended claims. In addition, with respect to the term "comprising" used in the specification or claims, the word is covered in a manner similar to the term "including", just as "including," is explained as a transitional word in the claims. In addition, any term "or" used in the specification of the claims is intended to mean "non-exclusive or".

Claims

1. A method for determining the producing reserves of a single well in a vertical and horizontal joint development well area, characterized in that: include: According to the well trajectory data and perforation data of the horizontal wells in the vertical and horizontal joint development well area, the virtual well points of the horizontal wells in the corresponding small layers are constructed; For each sub-layer, determine the control range of virtual well points and vertical well points in the sub-layer, and determine the produced reserves in the sub-layer according to the area of ​​the well point control range; The sum of the producing reserves of each virtual well point of the horizontal well in the corresponding sub-layer is determined as the producing reserves of the single well of the horizontal well, and the sum of the producing reserves of the vertical well in the drilled sub-layer is determined as the producing reserves of the single well of the vertical well.

2. The method according to claim 1, characterized in that The method of constructing virtual well points of horizontal wells in corresponding sublayers according to the well trajectory data and perforation data of horizontal wells in the vertical and horizontal joint development well area includes: According to the well trajectory data of the horizontal wells in the vertical and horizontal joint development well area, the top and bottom depths of each perforation section in the perforation data are converted into corresponding coordinate points in the drilled small layer, and each coordinate point is used as a virtual well point of the horizontal well in the drilled small layer.

3. The method according to claim 2, characterized in that Also includes: If the distance between the coordinate points corresponding to the top and bottom depths of the same perforation section is not less than twice the average producing radius of the well points in the straight-horizontal joint development well area, a virtual well point is added on the line connecting the corresponding two virtual well points.

4. The method according to claim 2, characterized in that: Also includes: If the horizontal well is put into production by fracturing, judging whether there is a position of the perforation section that overlaps with the fracturing position according to the fracturing data and the perforation data; If not, add a virtual well point at the fracturing position of this sublayer.

5. The method according to claim 4, characterized in that Also includes: If it is determined according to the height of the cracks generated by the hydraulic fracturing that in addition to the current sub-layer, a non-current sub-layer is also penetrated, the hydraulic fracturing position is determined to be at the corresponding position of the non-current sub-layer; Determine whether the perforation positions of other horizontal wells not in the sublayer coincide with the corresponding position; If not, add a virtual well point at the corresponding position of the non-sublayer.

6. The method according to claim 1, characterized in that The control range of determining the virtual well points and the vertical well points in the small layer includes: According to the average producing radius of the well points in the vertical and horizontal joint development well area, the control range of the virtual well points and the vertical well points in the small layer is determined by using the Delaunay triangulation method.

7. The method according to claim 6, characterized in that After the control range of the virtual well points and the vertical well points in the small layer is determined by the Delaunay triangulation method, the method further includes: The well point control range is corrected using the fault lines within the sublayer and the well area boundary lines.

8. The method according to claim 1, characterized in that The vertical well point is an oil well point or a water well point, the virtual well point is an oil well point, and after determining the producing reserves in the small layer according to the area of ​​the well point control range, the method further includes: The producing reserves of the water well points in the small layer are split into the producing reserves of the adjacent connected oil well points.

9. The method according to claim 8, characterized in that The method of splitting the producing reserves of the water well points in the small layer into the producing reserves of the adjacent connected oil well points includes: Determine the splitting amount of produced reserves according to the control range of the water well points in the small layer and the control range of the adjacent connected oil well points; The split amount of the produced reserves of the water well point is split into the produced reserves of the adjacent connected oil well points.

10. The method according to claim 1, characterized in that Determining the producing reserves in the small layer according to the area of ​​the well point control range includes: According to the area of ​​the well point control range, the producing reserves in the small layer are determined by the following formula: N c =100AhφS o r o / B oi In the above formula, N c is the produced reserves, A is the area of ​​the well point control range, h is the effective thickness, φ is the effective porosity, S o is the initial oil saturation, ρ o is the density of ground degassed crude oil, B oi is the volume coefficient of formation crude oil.

11. The method according to any one of claims 1 to 10, characterized in that: Also includes: The sum of the single well producing reserves of each horizontal well and vertical well in the vertical and horizontal combined development well area is determined as the block producing reserves of the vertical and horizontal combined development well area.

12. A device for determining the producing reserves of a single well in a vertical and horizontal joint development well area, characterized in that: The device comprises: The module for constructing virtual well points of horizontal wells is used to construct virtual well points of horizontal wells in corresponding sublayers according to the well trajectory data and perforation data of horizontal wells in the vertical and horizontal joint development well area; The module for determining the produced reserves of well points in the sub-layer is used to determine the control range of virtual well points and vertical well points in the sub-layer for each sub-layer, and determine the produced reserves in the sub-layer according to the area of ​​the well point control range; The producing reserves determination module is used to determine the sum of the producing reserves of each virtual well point of the horizontal well in the corresponding sub-layer as the single well producing reserves of the horizontal well, and to determine the sum of the producing reserves of the vertical well in the drilled sub-layer as the single well producing reserves of the vertical well.

13. A computer storage medium, characterized in that: The computer storage medium stores computer executable instructions, which, when executed by a processor, implement the method for determining the producing reserves of a single well in a vertical-horizontal joint development well area as claimed in any one of claims 1 to 11.

14. A server, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method for determining the producing reserves of a single well in a vertical-horizontal joint development well area as described in any one of claims 1 to 11 is implemented.

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