Horizontal well single sand body configuration method and system

Abstract

The invention discloses a horizontal well single sand body configuration method and system. The method comprises the steps that a coring vertical well single sand body vertical configuration mode is determined; identifying a vertical configuration interface of the single sand body of the non-coring vertical well; quantitatively identifying a horizontal well single sand body vertical configuration interface; a vertical well-horizontal well connection configuration comparison framework reflecting the structure trend is built; according to the horizontal well vertical configuration interface, the stratum change trend and the well trajectory trend, the horizontal well trajectory longitudinal drilling meeting single sand body period is comprehensively divided; judging the type of a single sand body configuration unit of the horizontal well; and the lateral contact relation of the horizontal well single sand body is judged, and configuration of the horizontal well single sand body is completed. According to the method, single sand body configuration is carried out in the low-density vertical well-horizontal well mixed development area, plane single sand body distribution trend analysis and boundary determination are carried out through the horizontal well, the uncertainty of inter-well sand body connectivity analysis and plane sand body distribution prediction is reduced to a large extent, and the limitation that research is carried out only through a vertical well in the past is overcome.

Description

Technical Field

[0001] The invention belongs to the technical field of petroleum geological exploration and development analysis methods, and relates to a single sand body configuration method and system for a horizontal well. Background Art

[0002] The study of single sand body configuration is an important basic work in the reconstruction of underground knowledge system by high-precision reservoir description. The core elements of single sand body configuration are the identification of vertical configuration interface and lateral connectivity. At present, the single sand body configuration method for the vertical well mode of dense well network has been relatively mature: the vertical configuration interface of vertical well is identified by characterizing interlayers, the unit type of configuration element is determined by core calibration and logging curve morphology, and the lateral connectivity is determined by comparing the thickness of single sand body, top and bottom elevation difference and curve response characteristics, and finally the configuration results are verified according to dynamic production characteristics.

[0003] However, it is difficult to study the single sand body configuration in blocks with low well density or mixed well pattern development, especially the single sand body configuration of horizontal wells is still relatively weak. At present, the research on the single sand body configuration of horizontal wells is limited to the lateral connectivity judgment of single sand bodies of the same sedimentary period encountered by the horizontal well itself; there is still a research gap in the connectivity relationship between the sand bodies of horizontal wells and adjacent wells, and the reservoirs encountered by horizontal wells may be single sand bodies of different sedimentary periods. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a single sand body configuration method and system for a horizontal well, thereby solving the technical problem of fine characterization of reservoir sedimentary phases and sand body distribution under sparse well network or horizontal well development conditions in the prior art.

[0005] The present invention is achieved through the following technical solutions:

[0006] A method for configuring a single sand body in a horizontal well comprises the following steps:

[0007] S1: Based on the detailed description of the core, combined with the electrical characteristics of the logging curve, the sedimentary cycle theory is used to determine the development characteristics of the interlayers in the target layer, and the sedimentary, lithological, vertical superposition relationship of single sand bodies of different periods and their combinations corresponding to the single microfacies genetic sand body in the target layer are carefully described to determine the vertical configuration mode of the single sand body in the coring vertical well;

[0008] S2: Quantitatively identify the vertical configuration interface of a single sand body in a non-cored vertical well based on the return rate of logging sensitive parameters;

[0009] S3: Quantitatively identify the vertical configuration interface of single sand body in horizontal well based on the identified vertical configuration interface of single sand body in non-cored vertical well;

[0010] S4: Based on the top structural surface trend interpreted by seismic interpretation, a vertical well-horizontal well connection configuration comparison framework reflecting the structural trend is established;

[0011] S5: Based on the vertical configuration interface of the horizontal well, the formation change trend and the well trajectory trend, the vertical drilling encounter of the horizontal well trajectory is comprehensively divided into single sand body stages;

[0012] S6: Determine the type of single sand body configuration unit of horizontal well configuration based on seismic interpretation;

[0013] S7: According to the guidance of the deposition model, the lateral contact relationship of the single sand body of the horizontal well is determined, and the configuration of the single sand body of the horizontal well is completed.

[0014] Preferably, the step S2 is specifically:

[0015] S21: According to the configuration interface characteristics of the coring well, determine the configuration interface interlayer type and logging sensitivity parameters;

[0016] S22: Calculate the return rate of the sensitive parameter. If the return rate of the sensitive parameter is greater than a set threshold, it is determined to be a configuration interface.

[0017] The return rate of the sensitive parameter is obtained by the following formula:

[0018]

[0019] Where: F is the return rate of sensitive parameters;

[0020] H1 is the characteristic value of the surrounding rock curve on the upper part of the configuration interface;

[0021] H2 is the characteristic value of the surrounding rock curve at the lower part of the configuration interface;

[0022] B is the characteristic value of the curve at the configuration interface.

[0023] Preferably, the step S4 is specifically:

[0024] S41: Select the pilot well of the horizontal well and the vertical well in the target end direction parallel to the horizontal section to build a comparison grid;

[0025] S42: Based on the top structural surface trend interpreted by seismic interpretation and the single well top elevation data, a horizontal well pilot well-horizontal well-horizontal well end nearest vertical well configuration framework is constructed to reflect the real structural trend.

[0026] Preferably, the types of the well trajectory trends in step S5 include "I" type, "V" type or "small well deviation" type.

[0027] Preferably, the step S6 is specifically:

[0028] S61: Read the vertical thickness of single sand body in each period of horizontal well;

[0029] S62: For meandering river deposits, the type of architectural unit is judged as point bar or abandoned channel based on the results of stratigraphic slicing of seismic interpretation attributes; for non-meaning river deposits, according to the same characteristics of the sedimentary characteristics of adjacent wells along the provenance direction, if the thickness of the horizontal well is consistent with that of the adjacent well in the same provenance direction, then the horizontal well is judged to be the same type of architectural unit.

[0030] Preferably, the lateral contact relationship of a single sand body in the horizontal well in step S7 includes three types: connected, weakly connected and unconnected.

[0031] Preferably, step S7 also includes analyzing the connectivity of sand bodies between wells based on oil test and production dynamic data to verify the configuration results, specifically: combining the dynamic data of the production wells and the injection-production response relationship to compare whether there is any influence between adjacent wells. If interference occurs, it means connectivity, otherwise, it means no connectivity.

[0032] A single sand body configuration system for a horizontal well, comprising:

[0033] Single sand body vertical configuration mode determination module for coring vertical wells: The single sand body vertical configuration mode determination module for coring vertical wells is used to determine the interlayer development characteristics in the target layer based on the detailed description of the core, combined with the electrical characteristics of the logging curve, and the comprehensive sedimentary cycle theory, and to finely characterize the sedimentation, lithology, and vertical superposition relationship of single sand bodies of different periods and their combinations corresponding to the single microfacies genetic sand body in the target layer, and determine the vertical configuration mode of the single sand body in the coring vertical well;

[0034] Non-coring vertical well single sand body vertical configuration interface recognition module: the non-coring vertical well single sand body vertical configuration interface recognition module is used to quantitatively identify the non-coring vertical well single sand body vertical configuration interface according to the return rate of the well logging sensitive parameter;

[0035] Horizontal well single sand body vertical configuration interface recognition module: The horizontal well single sand body vertical configuration interface recognition module is used to quantitatively identify the horizontal well single sand body vertical configuration interface according to the recognized non-coring vertical well single sand body vertical configuration interface;

[0036] Vertical well-horizontal well connection configuration comparison grid building module: the vertical well-horizontal well connection configuration comparison grid building module is used to build a vertical well-horizontal well connection configuration comparison grid reflecting the structural trend according to the top structural surface trend interpreted by seismic;

[0037] Module for dividing the single sand body phases encountered by the horizontal well trajectory in the vertical drilling: The module for dividing the single sand body phases encountered by the horizontal well trajectory in the vertical drilling is used to comprehensively divide the single sand body phases encountered by the horizontal well trajectory in the vertical drilling according to the vertical configuration interface of the horizontal well, the formation change trend and the well trajectory trend;

[0038] Horizontal well configuration single sand body configuration unit type judgment module: the horizontal well configuration single sand body configuration unit type judgment module is used to judge the horizontal well configuration single sand body configuration unit type in combination with seismic interpretation;

[0039] Horizontal well single sand body lateral contact relationship judgment module: The horizontal well single sand body lateral contact relationship judgment module is used to judge the horizontal well single sand body lateral contact relationship according to the guidance of the deposition model, and complete the configuration of the horizontal well single sand body.

[0040] A terminal device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above method when executing the computer program.

[0041] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the above method are implemented.

[0042] Compared with the prior art, the present invention has the following beneficial technical effects:

[0043] The present invention provides a single sand body configuration method for horizontal wells. Through vertical well-horizontal well linkage single sand body configuration analysis, the horizontal well vertical drilling encounter single sand body period and the single sand body lateral extension trend are determined, and combined with seismic attributes, core data, logging data, and production dynamic data analysis. The method realizes single sand body configuration in low-density vertical well-horizontal well mixed development areas, uses horizontal wells to perform planar single sand body distribution trend analysis and boundary determination, greatly reduces the uncertainty of inter-well sand body connectivity analysis and planar sand body distribution prediction, and solves the limitation of previous research relying solely on vertical wells; the division of single sand body periods encountered by horizontal wells in vertical drilling lays the foundation for oil reservoir production splitting, and solves the limitation of previous production splitting by simply relying on pilot well formation thickness to divide the single sand body boundary of horizontal wells. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0045] Figure 1 It is a schematic diagram of a process of a single sand body configuration method for a horizontal well in the present invention;

[0046] Figure 2 It is a structural schematic diagram of a single sand body configuration system for a horizontal well in the present invention;

[0047] Figure 3 This is a schematic diagram of a single sand body configuration in a vertical well in Example 2 of the present invention;

[0048] Figure 4 This is a schematic diagram of the interface characteristics of a single sand body configuration in a vertical well in Example 2 of the present invention, wherein a represents an interlayer with a certain thickness, and a return rate f>50%, b represents an extremely thin interlayer, and a return rate f>30%, and c represents no obvious interlayer, and a return rate f>20%.

[0049] Figure 5 This is a single sand body configuration interface identification diagram of the J1 horizontal well in Example 2 of the present invention;

[0050] Figure 6 This is a schematic diagram of the vertical single sand body stage division of a horizontal well in Example 2 of the present invention;

[0051] Figure 7 This is a vertical single sand body phase division diagram of the J1 horizontal well in Example 2 of the present invention;

[0052] Figure 8 Schematic diagram of determining lateral connectivity between wells in Example 2 of the present invention, where a represents connectivity, b represents weak connectivity, and c represents non-connectivity;

[0053] Fig. 9 This is a diagram of the single sand body configuration results of a horizontal well in Example 2 of the present invention. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0055] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0057] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0058] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0059] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0061] Example 1

[0062] like Figure 1 As shown, the present invention discloses a method for configuring a single sand body in a horizontal well, which is characterized by comprising the following steps:

[0063] S1: Determine the vertical configuration mode of a single sand body in a coring vertical well. Specifically, based on the detailed description of the core, combined with the electrical characteristics of the well logging curve, the sedimentary cycle theory is used to determine the development characteristics of the interlayers in the target layer, and the sedimentary, lithological, vertical superposition relationship of single sand bodies of different periods and their combinations corresponding to the single microfacies genetic sand body in the target layer are carefully described to determine the vertical configuration mode of a single sand body in a coring vertical well.

[0064] S2: Quantitatively identify the vertical configuration interface of a single sand body in a non-cored vertical well based on the return rate of logging sensitive parameters, specifically: S21: Determine the type of interlayers and logging sensitive parameters of the configuration interface based on the configuration interface characteristics of the coring well;

[0065] S22: Calculate the return rate of the sensitive parameter. If the return rate of the sensitive parameter is greater than a set threshold, it is determined to be a configuration interface. The threshold set here is the minimum return rate calculated by the logging curve corresponding to the interlayer of the vertical well.

[0066] The return rate of the sensitive parameter is obtained by the following formula:

[0067]

[0068] Where: F is the return rate of sensitive parameters;

[0069] H1 is the characteristic value of the surrounding rock curve on the upper part of the configuration interface;

[0070] H2 is the characteristic value of the surrounding rock curve at the lower part of the configuration interface;

[0071] B is the characteristic value of the curve at the configuration interface.

[0072] S3: Quantitatively identify the vertical configuration interface of single sand body in horizontal well based on the identified vertical configuration interface of single sand body in non-cored vertical well;

[0073] S4: According to the top structural surface trend of seismic interpretation, a vertical well-horizontal well connection configuration comparison framework reflecting the structural trend is established. Specifically:

[0074] S41: Select the pilot well of the horizontal well and the vertical well in the target end direction parallel to the horizontal section to build a comparison grid;

[0075] S42: Based on the top structural surface trend interpreted by seismic interpretation and the single well top elevation data, a horizontal well pilot well-horizontal well-horizontal well end nearest vertical well configuration framework is constructed to reflect the real structural trend.

[0076] S5: Based on the vertical configuration interface of the horizontal well, the formation change trend and the well trajectory trend, the horizontal well trajectory is comprehensively divided into the single sand body period encountered vertically; among them, the types of well trajectory trends include "I" type, "V" type or small well deviation type. If it is "I" type, the vertical drilling encounters a single sand body of the same period; if it is "small well deviation" type, the vertical drilling encounters several sets of configuration interfaces, that is, several sets of single sand bodies; if it is "V" type, the vertical drilling encounters several sets of configuration interfaces when the well trajectory encounters the deepest formation, that is, several sets of single sand bodies; multiple configuration interfaces encountered in a short distance during the advancement of the well trajectory are actually the same configuration interface.

[0077] S6: Determine the type of single sand body configuration unit of horizontal well configuration based on seismic interpretation, specifically:

[0078] S61: Read the vertical thickness of single sand body in each period of horizontal well;

[0079] S62: For meandering river deposits, the type of architectural unit is judged as point bar or abandoned channel based on the result of stratigraphic slice of seismic interpretation attribute; for non-meaning river deposits, according to the same characteristics of sedimentary characteristics of adjacent wells along the provenance direction, if the thickness of the horizontal well is consistent with that of the adjacent well in the same provenance direction, then the horizontal well is judged to be the same type of architectural unit;

[0080] S7: Based on the guidance of the sedimentary model, determine the lateral contact relationship of the single sand body in the horizontal well, and complete the configuration of the single sand body in the horizontal well, wherein the lateral contact relationship includes three types: connected, weakly connected and disconnected. This step is specifically as follows: the lateral contact relationship of the single sand body is divided into three types: connected, weakly connected and disconnected according to the thickness of the single sand body and the difference in top and bottom elevations. When the horizontal well does not encounter a stable interlayer in the horizontal direction, if the corresponding logging interpretation of the single sand body in the same period as the adjacent well has the same or similar specific characteristics, and the top and bottom elevations and sand body thickness of the single sand body in the same period differ by 0.0 to 1.5m, it is preliminarily determined that the single sand bodies between the two wells are connected in the lateral direction; when the horizontal well does not encounter a stable interlayer in the horizontal direction, if the corresponding logging interpretation of the single sand body in the same period as the adjacent well When the two wells have the same or similar specific characteristics, and the difference in the top and bottom elevations and the thickness of the single sand bodies of the same period is greater than or equal to 1.5m, and less than 1 / 2 of the thickness of the smaller single sand body, it is preliminarily determined that the single sand bodies between the two wells are partially connected in the lateral direction; when the horizontal well encounters a stable interlayer laterally, or the corresponding logging interpretation of the single sand body of the same period in the adjacent well is obviously inconsistent, and the difference in the top elevation or the thickness of the single sand body of the same period is greater than half of the thickness of the smaller single sand body, it is preliminarily determined that the single sand bodies between the two wells are not connected in the lateral direction.

[0081] S8: Analyze the connectivity of sand bodies between wells based on oil test and production dynamic data to verify the configuration results. Specifically, combine the dynamic data of the production wells and the injection-production response relationship to compare whether there is any influence between adjacent wells. If interference occurs, it means connectivity, otherwise, it means no connectivity.

[0082] The present invention determines the single sand body configuration period and the lateral extension trend of the single sand body encountered by the horizontal well through the vertical well-horizontal well linkage single sand body configuration analysis, combines seismic attributes, core data, logging data, and production dynamic data analysis, and verifies the single sand body configuration of the horizontal well through dynamic production data. The method of single sand body configuration of a horizontal well provided by the present invention realizes the single sand body configuration in a low-density vertical well-horizontal well mixed development area, uses horizontal wells to analyze the distribution trend and boundary of a single sand body in a plane, greatly reduces the uncertainty of the sand body connectivity analysis between wells and the prediction of the distribution of the sand body in a plane, and solves the limitation of previous research relying solely on vertical wells; the division of the single sand body period encountered by the horizontal well in the vertical drilling lays the foundation for the splitting of the oil reservoir production, and solves the limitation of previous production splitting by simply relying on the formation thickness of the pilot well to divide the single sand body boundary of the horizontal well. Among the existing technologies, the research methods for single sand body configuration of horizontal wells are not mature and systematic. They are mainly based on a specific single sedimentary background, and for horizontal wells with a "I" trajectory, when drilling a single sand body of the same period, it is judged whether the horizontal well trajectory has drilled a single sand body boundary. In areas where sedimentation and structure change rapidly, the single sand body configuration of horizontal wells drilling through different formations and different sedimentary phases has not yet been involved. The method involved in the patent of this invention will have a certain reference significance for the fine characterization of reservoir sedimentary sand bodies and the spatial distribution research of configuration units under the conditions of horizontal well patterns in oil fields.

[0083] In addition, if Figure 2 As shown, the present invention also discloses a horizontal well single sand body configuration system, comprising:

[0084] Single sand body vertical configuration mode determination module for coring vertical wells: The single sand body vertical configuration mode determination module for coring vertical wells is used to determine the interlayer development characteristics in the target layer based on the detailed description of the core, combined with the electrical characteristics of the logging curve, and the comprehensive sedimentary cycle theory, and to finely characterize the sedimentation, lithology, and vertical superposition relationship of single sand bodies of different periods and their combinations corresponding to the single microfacies genetic sand body in the target layer, and determine the vertical configuration mode of the single sand body in the coring vertical well;

[0085] Non-coring vertical well single sand body vertical configuration interface recognition module: the non-coring vertical well single sand body vertical configuration interface recognition module is used to quantitatively identify the non-coring vertical well single sand body vertical configuration interface according to the return rate of the well logging sensitive parameter;

[0086] Horizontal well single sand body vertical configuration interface recognition module: The horizontal well single sand body vertical configuration interface recognition module is used to quantitatively identify the horizontal well single sand body vertical configuration interface according to the recognized non-coring vertical well single sand body vertical configuration interface;

[0087] Vertical well-horizontal well connection configuration comparison grid building module: the vertical well-horizontal well connection configuration comparison grid building module is used to build a vertical well-horizontal well connection configuration comparison grid reflecting the structural trend according to the top structural surface trend interpreted by seismic;

[0088] Module for dividing the single sand body phases encountered by the horizontal well trajectory in the vertical drilling: The module for dividing the single sand body phases encountered by the horizontal well trajectory in the vertical drilling is used to comprehensively divide the single sand body phases encountered by the horizontal well trajectory in the vertical drilling according to the vertical configuration interface of the horizontal well, the formation change trend and the well trajectory trend;

[0089] Horizontal well configuration single sand body configuration unit type judgment module: the horizontal well configuration single sand body configuration unit type judgment module is used to judge the horizontal well configuration single sand body configuration unit type in combination with seismic interpretation;

[0090] Horizontal well single sand body lateral contact relationship judgment module: The horizontal well single sand body lateral contact relationship judgment module is used to judge the horizontal well single sand body lateral contact relationship according to the guidance of the deposition model, and complete the configuration of the horizontal well single sand body.

[0091] Further preferably, the horizontal well single sand body configuration system also includes a verification module, which is used to analyze the connectivity of sand bodies between wells based on oil testing and production dynamic data, and verify the configuration results. The specific verification process is to combine the dynamic data of the production well and the injection-production response relationship to compare whether there is an impact between adjacent wells. If interference occurs, it means connectivity, otherwise, it means disconnection.

[0092] Example 2

[0093] In order to further explain the technical solution of the present invention, L oilfield J block is used as an example for specific analysis and explanation. The target layer in the study area mainly develops two subfacies: braided river delta front and meandering river. The main provenance direction of the meandering river is east-west, and the point-bar single sand body is the main reservoir sand body; the main provenance direction of the delta front is northeast-southwest, and the underwater distributary channel single sand body is the main reservoir sand body. It should be pointed out here that the embodiments described here are only used to explain the present invention, not to limit the present invention. Any modifications, replacements and improvements made within the principles of the present invention are within the protection scope of the present invention.

[0094] S1: Determine the vertical configuration pattern of a single sand body in a vertical well

[0095] Under the guidance of the sedimentary model, the vertical configuration mode of each single sand body is determined according to the core rhythmic characteristics and the logging curve cycle, and the sedimentary cycle characteristics, configuration unit type, microstructure, corresponding depth and thickness data of the single sand body, and the vertical superposition relationship between each single sand body and its combination are clarified.

[0096] like Figure 3As shown in the figure, there are 6 sets of single sand bodies from bottom to top in the target layer of Well J3, which are represented by codes 1-6 respectively. The thickness of each set of single sand bodies varies, and the main thickness variation range is 2-5m. For example, the single sand body of code 2 point bar corresponds to the "box-type" feature of electrical properties, with a thickness of 3.5m; the single sand body of code 3 underwater distributary channel corresponds to the "box-type" feature of electrical properties, with a thickness of 3m; the single sand body of code 4 underwater distributary channel corresponds to the "bell-shaped" feature of electrical properties, with a thickness of 2.2m. There is a 2m mud interlayer between code 3 and code 2 single sand bodies, and a 1.1m mud interlayer between code 3 and code 4 single sand bodies. The corresponding single sand body of code 3 is isolated vertically and is not connected above or below.

[0097] S2: Figure 4 As shown, quantitative identification of the vertical configuration interface of a single sand body: According to the configuration interface characteristics of the coring well, it is determined that the configuration interface is mainly muddy and calcareous interlayers, and the logging sensitive parameter curves are mainly gamma, sonic, density, and flushing zone resistivity. When the return rate F of each sensitive parameter is greater than 20% (for this block a = 20%), it is judged to be a configuration interface.

[0098] S3: Identify the vertical configuration interface of a single sand body in a horizontal well according to S2: A total of 9 configuration interfaces of the J1 horizontal well were identified, such as Figure 5 shown.

[0099] S4: Build a vertical well-horizontal well configuration comparison framework that reflects the structural trend;

[0100] According to the configuration analysis of the J1 horizontal well, a single sand body configuration comparison framework of J2-J1 horizontal well-J1 pilot well was established. Combining the seismic structural interpretation results and the single well elevation data, the structure from J2 to J1 first increased and then decreased, and the structure from J1 horizontal well to J1 pilot well gradually decreased.

[0101] S5: Based on the vertical configuration interface of the horizontal well, the formation change trend and the well trajectory trend, the vertical single sand body stages encountered by the horizontal well trajectory are comprehensively divided;

[0102] According to the five configuration interfaces, after the J1 horizontal well entered the target at point A, it encountered three phases of single sand bodies, AB was the first phase (3 configuration interfaces were encountered), BC was the second phase (1 configuration interface was encountered), CD was the third phase (3 configuration interfaces were encountered, very thin), and the calcium mud mixed interlayer encountered near point D was the bottom of the single sand body of the third phase underwater distributary channel (one configuration interface was encountered, very thin). Subsequently, due to the upward trajectory and the uplift of the stratum structure, the mud interlayer was not drilled through and returned to the third single sand body, as shown in Figure 2. Figure 6 shown.

[0103] S6: Based on the sedimentary model, the type of single sand body configuration unit in the horizontal well is determined according to the thickness of the single sand body and the seismic interpretation attribute slice:

[0104] The first phase single sand body is a meandering river deposit, which can be directly judged as a point bar based on the seismic interpretation attribute stratigraphic slice; the second phase single sand body is a network river deposit, with a sand body thickness of 3.5m, which is consistent with the sand thickness of the distributary channel of the vertical well, and is judged to be a distributary channel; the third phase sand body is a delta deposit, with a sand body thickness of 4m, which is consistent with the thickness of the third phase single sand body of the adjacent J3 well in the direction of the source, and is judged to be an underwater distributary channel deposit like the J3 well. Figure 7 shown.

[0105] S7: Based on the sedimentation pattern, determine the lateral contact relationship of a single sand body in a horizontal well:

[0106] The lateral contact relationship of a single sand body can be divided into three types: connected, weakly connected and disconnected. Figure 8 shown.

[0107] For the first phase single sand body: under the guidance of the meandering river deposition model, the well logging curves of J1 horizontal well and J2 well are both bell-shaped, the vertical thickness of the single sand body in J1 horizontal well is about 2m, and the height of the sand body from the top is about 0m; the thickness of the single sand body in J2 well is 2m, and the height of the sand body from the top is about 1m; the pilot well of J1 is an abandoned river channel with a sand thickness of 0m. The top and bottom elevations and vertical thickness of the single sand bodies in the same period of J1 horizontal well and J2 well differ by 0.0-1.5m. It is preliminarily determined that the first phase single sand body of J1 horizontal well is connected with J2 well, but not with J1 pilot well;

[0108] For the second-stage single sand body: under the guidance of the meander network river deposition model, the logging curves of the single sand bodies in the distributary channel are all box-shaped. The thickness of the single sand bodies in J2 well, J1 horizontal well, and J1 pilot well are 3m, 3.5m, and 2.5m respectively. The height of the sand bodies from the top and bottom is 0m. The top and bottom elevations and vertical thickness of the single sand bodies in the same period differ by 0.0-1.5m. It is preliminarily determined that the second-stage single sand body of J1 horizontal well is connected with both J2 well and J1 pilot well.

[0109] For the third-phase single sand body: under the guidance of the delta front depositional model, the J1 horizontal well logging curve is bell-shaped, with a single sand body thickness of about 4m and a height of about 1m from the top; the J2 well single sand body logging curve is funnel-shaped, with a single sand body thickness of 1.3m and a height of about 1.6m from the top; the J1 pilot well single sand body logging curve is funnel-shaped, with a single sand body thickness of 1.5m and a height of about 2.2m from the top; when the logging curve response characteristics of the single sand bodies in the same period in the two wells are obviously inconsistent, and the top surface elevation difference or the vertical thickness difference of the single sand body in the same period is greater than half of the thickness of the smaller single sand body, it is preliminarily determined that the single sand bodies between the two wells are not connected in the lateral direction. It is preliminarily determined that the third-phase single sand body of the J1 horizontal well is not connected to both the J2 well and the J1 pilot well. Fig. 9 shown.

[0110] S8: Analyze the connectivity of sand bodies between wells based on oil test and production performance data to verify the configuration results.

[0111] According to the verification of oil test, trial production and production dynamic data, the neutron lifetime test of J2 well located in the high position in 2008 showed that the 4th phase single sand body was highly flooded, and the water content of J2 and J3 wells had reached 100%. In the case of good connectivity of the 4th phase single sand body in this area, the water content of J1 horizontal well in the same period was only 40%, which also proved that J1 horizontal well did not encounter the 4th phase single sand body and the 3rd phase single sand body was not connected.

[0112] A schematic diagram of a terminal device provided in an embodiment of the present invention. The terminal device of this embodiment includes: a processor, a memory, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps in the above-mentioned method embodiments are implemented. Alternatively, when the processor executes the computer program, the functions of the modules / units in the above-mentioned device embodiments are implemented.

[0113] The computer program may be divided into one or more modules / units, and the one or more modules / units are stored in the memory and executed by the processor to accomplish the present invention.

[0114] The terminal device may be a computing device such as a desktop computer, a notebook, a PDA, a cloud server, etc. The terminal device may include, but is not limited to, a processor and a memory.

[0115] The processor can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0116] The memory may be used to store the computer programs and / or modules, and the processor implements various functions of the terminal device by running or executing the computer programs and / or modules stored in the memory and calling the data stored in the memory.

[0117] If the module / unit integrated in the terminal device is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0118] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for configuring a single sand body in a horizontal well, characterized in that: The following steps are involved: S1: Based on the detailed description of the core, combined with the electrical characteristics of the logging curve, the sedimentary cycle theory is used to determine the development characteristics of the interlayers in the target layer, and the sedimentary, lithological, vertical superposition relationship of single sand bodies of different periods and their combinations corresponding to the single microfacies genetic sand body in the target layer are carefully described to determine the vertical configuration mode of the single sand body in the coring vertical well; S2: Quantitatively identify the vertical configuration interface of a single sand body in a non-cored vertical well based on the return rate of logging sensitive parameters; S3: Quantitatively identify the vertical configuration interface of single sand body in horizontal well based on the identified vertical configuration interface of single sand body in non-cored vertical well; S4: Based on the top structural surface trend interpreted by seismic interpretation, a vertical well-horizontal well connection configuration comparison framework reflecting the structural trend is established; S5: Based on the vertical configuration interface of the horizontal well, the formation change trend and the well trajectory trend, the vertical drilling encounter of the horizontal well trajectory is comprehensively divided into single sand body stages; S6: Determine the type of single sand body structural unit in horizontal wells based on seismic interpretation; S7: According to the guidance of the deposition model, the lateral contact relationship of the single sand body of the horizontal well is determined, and the configuration of the single sand body of the horizontal well is completed.

2. A method for configuring a single sand body in a horizontal well according to claim 1, characterized in that: The step S2 is specifically as follows: S21: According to the configuration interface characteristics of the coring well, determine the configuration interface interlayer type and logging sensitivity parameters; S22: Calculate the return rate of the sensitive parameter. If the return rate of the sensitive parameter is greater than a set threshold, it is determined to be a configuration interface. The return rate of the sensitive parameter is obtained by the following formula: Where: F is the return rate of sensitive parameters; H1 is the characteristic value of the surrounding rock curve on the upper part of the configuration interface; H2 is the characteristic value of the surrounding rock curve at the lower part of the configuration interface; B is the characteristic value of the curve at the configuration interface.

3. A method for configuring a single sand body in a horizontal well according to claim 1, characterized in that: The step S4 is specifically as follows: S41: Select the pilot well of the horizontal well and the vertical well in the target end direction parallel to the horizontal section to build a comparison grid; S42: Based on the top structural surface trend interpreted by seismic interpretation and the single well top elevation data, a horizontal well pilot well-horizontal well-horizontal well end nearest vertical well configuration framework is constructed to reflect the real structural trend.

4. A method for configuring a single sand body in a horizontal well according to claim 1, characterized in that: The types of the well trajectory trends in step S5 include "I" type, "V" type or "small well deviation" type.

5. A method for configuring a single sand body in a horizontal well according to claim 1, characterized in that: The step S6 is specifically as follows: S61: Read the vertical thickness of single sand body in each period of horizontal well; S62: For meandering river deposits, the type of architectural unit is judged as point bar or abandoned channel based on the results of stratigraphic slicing of seismic interpretation attributes; for non-meaning river deposits, according to the same characteristics of the sedimentary characteristics of adjacent wells along the provenance direction, if the thickness of the horizontal well is consistent with that of the adjacent well in the same provenance direction, then the horizontal well is judged to be the same type of architectural unit.

6. A method for configuring a single sand body in a horizontal well according to claim 1, characterized in that: The lateral contact relationship of a single sand body in the horizontal well in step S7 includes three types: connected, weakly connected and disconnected.

7. A method for configuring a single sand body in a horizontal well according to claim 1, characterized in that: The step S7 also includes analyzing the connectivity of the sand bodies between wells based on the oil test and production dynamic data to verify the configuration result, specifically: combining the dynamic data of the production well and the injection-production response relationship to compare whether there is any influence between adjacent wells. If interference occurs, it means connectivity, otherwise, it means no connectivity.

8. A horizontal well single sand body configuration system, characterized in that: include: Single sand body vertical configuration mode determination module for coring vertical wells: The single sand body vertical configuration mode determination module for coring vertical wells is used to determine the interlayer development characteristics in the target layer based on the detailed description of the core, combined with the electrical characteristics of the logging curve, and the comprehensive sedimentary cycle theory, and to finely characterize the sedimentation, lithology, and vertical superposition relationship of single sand bodies of different periods and their combinations corresponding to the single microfacies genetic sand body in the target layer, and determine the vertical configuration mode of the single sand body in the coring vertical well; Non-coring vertical well single sand body vertical configuration interface recognition module: the non-coring vertical well single sand body vertical configuration interface recognition module is used to quantitatively identify the non-coring vertical well single sand body vertical configuration interface according to the return rate of the well logging sensitive parameter; Horizontal well single sand body vertical configuration interface recognition module: The horizontal well single sand body vertical configuration interface recognition module is used to quantitatively identify the horizontal well single sand body vertical configuration interface according to the recognized non-coring vertical well single sand body vertical configuration interface; Vertical well-horizontal well connection configuration comparison grid building module: the vertical well-horizontal well connection configuration comparison grid building module is used to build a vertical well-horizontal well connection configuration comparison grid reflecting the structural trend according to the top structural surface trend interpreted by seismic; Module for dividing the single sand body phases encountered by the horizontal well trajectory in the vertical drilling: The module for dividing the single sand body phases encountered by the horizontal well trajectory in the vertical drilling is used to comprehensively divide the single sand body phases encountered by the horizontal well trajectory in the vertical drilling according to the vertical configuration interface of the horizontal well, the formation change trend and the well trajectory trend; Horizontal well configuration single sand body configuration unit type judgment module: the horizontal well configuration single sand body configuration unit type judgment module is used to judge the horizontal well configuration single sand body configuration unit type in combination with seismic interpretation; Horizontal well single sand body lateral contact relationship judgment module: The horizontal well single sand body lateral contact relationship judgment module is used to judge the horizontal well single sand body lateral contact relationship according to the guidance of the deposition model, and complete the configuration of the horizontal well single sand body.

9. A terminal device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

Images