A method and device for constructing a horizontal well heterogeneous formation interpretation model

Abstract

The present invention provides a method and device for constructing a horizontal well heterogeneous formation interpretation model, the method comprising: obtaining multi-well data of a work area where the horizontal well is located; selecting a target layer, and selecting a reservoir logging parameter value corresponding to the target layer from the multi-well data of the work area where the horizontal well is located; determining the same-layer interpolation grid size according to the reservoir logging parameter value; determining the interpolation range according to the multi-well data of the work area where the horizontal well is located; interpolating the multi-well data of the work area where the horizontal well is located according to the same-layer interpolation grid size, the interpolation range and the selected target layer, and determining a three-dimensional formation attribute body; segmenting the three-dimensional formation attribute body to determine a three-dimensional formation section; unfolding the three-dimensional formation section along the well trajectory to determine a two-dimensional anisotropic formation model; adjusting the two-dimensional anisotropic formation model according to the logging response characteristics to determine the horizontal well heterogeneous formation interpretation model. The present invention improves the construction and interpretation accuracy of the horizontal well formation model.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum well logging, and in particular to a method and device for constructing a horizontal well heterogeneous formation interpretation model. Background Art

[0002] This section is intended to provide a background or context to embodiments of the invention that are recited in the claims. No description herein is admitted to be prior art by inclusion in this section.

[0003] In the process of horizontal well interpretation, the first thing to do is to build a formation interpretation model based on the logging response characteristics and comparison with adjacent wells.

[0004] At present, for the construction of such formation interpretation models, existing software and technologies for horizontal well interpretation all assume that the formation is a uniform model, that is, it is believed that the formation attribute values ​​in the same formation are uniform and unchanged. This assumption is applicable to most horizontal well interpretation formations, but in clastic rock reservoirs, shale reservoirs and other formations, the constructed model is inconsistent with the actual formation, resulting in reduced interpretation accuracy.

[0005] Therefore, how to provide a new solution that can solve the above technical problems is a technical problem that needs to be solved urgently in this field. Summary of the invention

[0006] The embodiment of the present invention provides a method for constructing a horizontal well heterogeneous formation interpretation model, which improves the construction and interpretation accuracy of the horizontal well formation model. The method includes:

[0007] Obtain multi-well data in the work area where the horizontal well is located;

[0008] Select the target layer, and select the reservoir logging parameter value corresponding to the target layer from the multi-well data in the work area where the horizontal well is located;

[0009] According to the reservoir logging parameter values, determine the interpolation grid size of the same layer;

[0010] Determine the interpolation range based on the multi-well data in the work area where the horizontal well is located;

[0011] According to the same-layer interpolation grid size, interpolation range and selected target layer, multi-well data in the work area where the horizontal well is located are interpolated to determine the three-dimensional attribute volume of the formation;

[0012] Slice the three-dimensional stratigraphic attribute body to determine the three-dimensional stratigraphic section;

[0013] Expand the three-dimensional stratigraphic section along the well trajectory to determine the two-dimensional anisotropic stratigraphic model;

[0014] The two-dimensional anisotropic formation model is adjusted according to the logging response characteristics to determine the heterogeneous formation interpretation model for horizontal wells.

[0015] The embodiment of the present invention further provides a device for constructing a horizontal well heterogeneous formation interpretation model, comprising:

[0016] A data acquisition module, used to acquire multi-well data in the work area where the horizontal well is located;

[0017] The reservoir logging parameter numerical module is used to select the target layer and select the reservoir logging parameter value corresponding to the target layer from the multi-well data in the work area where the horizontal well is located;

[0018] The same-layer interpolation grid size determination module is used to determine the same-layer interpolation grid size according to the reservoir logging parameter value;

[0019] An interpolation range determination module is used to determine the interpolation range based on multi-well data in the work area where the horizontal well is located;

[0020] The three-dimensional formation attribute body determination module is used to interpolate the multi-well data of the work area where the horizontal well is located according to the same-layer interpolation grid size, interpolation range and selected target layer to determine the three-dimensional formation attribute body;

[0021] A three-dimensional stratigraphic section determination module is used to segment the three-dimensional stratigraphic attribute body and determine the three-dimensional stratigraphic section;

[0022] A two-dimensional anisotropic formation model determination module is used to expand the three-dimensional formation section along the well trajectory to determine the two-dimensional anisotropic formation model;

[0023] The module for determining the interpretation model of the heterogeneous formation of the horizontal well is used to adjust the two-dimensional anisotropic formation model according to the logging response characteristics and determine the interpretation model of the heterogeneous formation of the horizontal well.

[0024] An embodiment of the present invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above-mentioned method for constructing a horizontal well heterogeneous formation interpretation model when executing the computer program.

[0025] An embodiment of the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for executing the above-mentioned method for constructing a horizontal well heterogeneous formation interpretation model.

[0026] A method and device for constructing a horizontal well heterogeneous formation interpretation model provided by an embodiment of the present invention include: first, obtaining multi-well data of a work area where the horizontal well is located; then selecting a target layer, and selecting a reservoir logging parameter value corresponding to the target layer from the multi-well data of the work area where the horizontal well is located; then, determining the same-layer interpolation grid size according to the reservoir logging parameter value; continuing to determine the interpolation range according to the multi-well data of the work area where the horizontal well is located; next, interpolating the multi-well data of the work area where the horizontal well is located according to the same-layer interpolation grid size, the interpolation range and the selected target layer, and determining a three-dimensional formation attribute body; next, segmenting the three-dimensional formation attribute body and determining a three-dimensional formation section; next, unfolding the three-dimensional formation section along the well trajectory to determine a two-dimensional anisotropic formation model; finally, adjusting the two-dimensional anisotropic formation model according to the logging response characteristics to determine the horizontal well heterogeneous formation interpretation model. An embodiment of the present invention provides a method for constructing a horizontal well heterogeneous formation interpretation model for a heterogeneous formation. The method utilizes multi-well curve data, formation comparison and other information in a work area to construct a heterogeneous formation model through spatial three-dimensional interpolation, so that the interpretation model is more in line with the actual geological conditions. By using the embodiment of the present invention, a heterogeneous formation model can be constructed in clastic rock formations and shale reservoirs based on the differences in the response characteristics of the curves, thereby improving the construction and interpretation accuracy of the horizontal well formation model. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0028] Figure 1 It is a schematic diagram of a method for constructing a horizontal well heterogeneous formation interpretation model according to an embodiment of the present invention.

[0029] Figure 2 The present invention is a flowchart of a method for constructing a horizontal well heterogeneous formation interpretation model according to an embodiment of the present invention.

[0030] Figure 3 A schematic diagram of horizontal well and multi-well data in a method for constructing a horizontal well heterogeneous formation interpretation model according to an embodiment of the present invention.

[0031] Figure 4 This is a comparison diagram of the anisotropy differences of a histogram of a method for building a horizontal well heterogeneous formation interpretation model according to an embodiment of the present invention.

[0032] Figure 5A schematic diagram of anisotropy difference scale discrimination in a method for constructing a horizontal well heterogeneous formation interpretation model according to an embodiment of the present invention.

[0033] Figure 6 This is a schematic diagram of a three-dimensional formation attribute body formed by three-dimensional attribute interpolation in a method for constructing a horizontal well heterogeneous formation interpretation model according to an embodiment of the present invention.

[0034] Figure 7 A schematic diagram of a well trajectory of a method for constructing a horizontal well heterogeneous formation interpretation model according to an embodiment of the present invention.

[0035] Figure 8 A schematic diagram of a three-dimensional formation slice of a method for constructing a horizontal well heterogeneous formation interpretation model according to an embodiment of the present invention.

[0036] Fig. 9 A schematic diagram of a stratigraphic cross section of a two-dimensional anisotropic stratigraphic model of a method for constructing a horizontal well heterogeneous stratigraphic interpretation model according to an embodiment of the present invention.

[0037] Fig.10 It is a schematic diagram of a horizontal well heterogeneous formation interpretation model output after adjustment according to a method for constructing a horizontal well heterogeneous formation interpretation model in an embodiment of the present invention.

[0038] Fig.11 A schematic diagram of a computer device for running a method for constructing a horizontal well heterogeneous formation interpretation model implemented by the present invention.

[0039] Fig.12 The present invention is a schematic diagram of a device for constructing a horizontal well heterogeneous formation interpretation model according to an embodiment of the present invention. DETAILED DESCRIPTION

[0040] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0041] Figure 1 FIG. 1 is a schematic diagram of a method for constructing a horizontal well heterogeneous formation interpretation model according to an embodiment of the present invention. Figure 1 As shown, an embodiment of the present invention provides a method for constructing a horizontal well heterogeneous formation interpretation model, which improves the construction and interpretation accuracy of the horizontal well formation model. The method includes:

[0042] Step 101: Acquire multi-well data of the work area where the horizontal well is located;

[0043] Step 102: Select a target layer, and select a reservoir logging parameter value corresponding to the target layer from the multi-well data in the work area where the horizontal well is located;

[0044] Step 103: Determine the size of the same-layer interpolation grid according to the reservoir logging parameter value;

[0045] Step 104: determining an interpolation range according to multi-well data of the work area where the horizontal well is located;

[0046] Step 105: interpolating the multi-well data of the work area where the horizontal well is located according to the same-layer interpolation grid size, interpolation range and selected target layer to determine the three-dimensional attribute body of the formation;

[0047] Step 106: Segment the three-dimensional stratigraphic attribute body to determine a three-dimensional stratigraphic section;

[0048] Step 107: Expand the three-dimensional stratigraphic section along the well trajectory to determine a two-dimensional anisotropic stratigraphic model;

[0049] Step 108: The two-dimensional anisotropic formation model is adjusted according to the logging response characteristics to determine the horizontal well heterogeneous formation interpretation model.

[0050] A method for constructing a horizontal well heterogeneous formation interpretation model provided by an embodiment of the present invention comprises: firstly obtaining multi-well data of a work area where the horizontal well is located; then selecting a target layer, and selecting a reservoir logging parameter value corresponding to the target layer from the multi-well data of the work area where the horizontal well is located; then determining the same-layer interpolation grid size according to the reservoir logging parameter value; continuing to determine the interpolation range according to the multi-well data of the work area where the horizontal well is located; next, interpolating the multi-well data of the work area where the horizontal well is located according to the same-layer interpolation grid size, the interpolation range and the selected target layer, and determining a three-dimensional formation attribute body; next, segmenting the three-dimensional formation attribute body and determining a three-dimensional formation section; next, unfolding the three-dimensional formation section along the well trajectory and determining a two-dimensional anisotropic formation model; finally, adjusting the two-dimensional anisotropic formation model according to the logging response characteristics, and determining the horizontal well heterogeneous formation interpretation model. An embodiment of the present invention provides a method for constructing a horizontal well heterogeneous formation interpretation model for a heterogeneous formation. The method utilizes multi-well curve data, formation comparison and other information in a work area to construct a heterogeneous formation model through spatial three-dimensional interpolation, so that the interpretation model is more in line with the actual geological conditions. By using the embodiment of the present invention, a heterogeneous formation model can be constructed in clastic rock formations and shale reservoirs based on the differences in the response characteristics of the curves, thereby improving the construction and interpretation accuracy of the horizontal well formation model.

[0051] Figure 2 FIG. 1 is a flow chart of a method for constructing a horizontal well heterogeneous formation interpretation model according to an embodiment of the present invention. Figure 2As shown, when a method for constructing a horizontal well heterogeneous formation interpretation model provided by an embodiment of the present invention is specifically implemented, the specific implementation may include: obtaining multi-well data of the work area where the horizontal well is located; selecting a target layer, and selecting a reservoir logging parameter value corresponding to the target layer from the multi-well data of the work area where the horizontal well is located; determining the same-layer interpolation grid size according to the reservoir logging parameter value; determining the interpolation range according to the multi-well data of the work area where the horizontal well is located; interpolating the multi-well data of the work area where the horizontal well is located according to the same-layer interpolation grid size, the interpolation range and the selected target layer to determine a three-dimensional formation attribute body; segmenting the three-dimensional formation attribute body to determine a three-dimensional formation section; unfolding the three-dimensional formation section along the well trajectory to determine a two-dimensional anisotropic formation model; adjusting the two-dimensional anisotropic formation model according to the logging response characteristics to determine a horizontal well heterogeneous formation interpretation model.

[0052] When implementing a method for constructing a horizontal well heterogeneous formation interpretation model provided by an embodiment of the present invention, in one embodiment, the aforementioned acquisition of multi-well data in a work area where the horizontal well is located includes:

[0053] Through the three-dimensional distribution map, the positional relationship between each adjacent well and the horizontal well is measured, and the wells whose distance to the horizontal well is within the set threshold range are selected;

[0054] Load logging data, formation data and seismic plane data as multi-well data for the work area where the horizontal well is located.

[0055] In an embodiment, in order to obtain multi-well data of the work area where the horizontal well is located, it can specifically include: measuring the positional relationship between each adjacent well and the horizontal well through a three-dimensional distribution map, and selecting wells whose distance from the horizontal well is within a set threshold range; loading logging data, formation data and seismic layer data as multi-well data of the work area where the horizontal well is located.

[0056] Figure 3 Schematic diagram of horizontal well and multi-well data of a method for constructing a horizontal well heterogeneous formation interpretation model according to an embodiment of the present invention, as shown in FIG. Figure 3 As shown, in order to select the interpolation object, it is necessary to obtain the multi-well data of the work area where the horizontal well is located. Through the three-dimensional distribution map, the positional relationship between each adjacent well and the horizontal well is observed, and the well that is closer to the horizontal well is selected. Next, the logging data, formation data and seismic layer data are loaded as the multi-well data of the work area where the horizontal well is located. The formation data can be geological stratification data or stratification data after stratum comparison. The selection of formation data depends on the characteristics of the target layer where the horizontal well is located. In this method, a heterogeneous formation model identified from geology is selected. In this embodiment, 9 vertical wells and 1 horizontal well are selected in the work area. The formation is geological stratification, such as Figure 3As shown. Well logging data and formation data are the first data to be obtained. Well logging data mainly uses conventional measurement data or reservoir parameter data, and formation data is divided into different comparisons according to different interpretation tasks. The granularity of the division layer is related to the interpretation object, for example, division according to reservoir distribution, division according to geological stratification, division according to target layer and marker layer, etc. After obtaining well logging data and formation data, seismic layer data must also be loaded; among them, seismic layer data is the result data of seismic interpretation obtained through software or other seismic methods.

[0057] When implementing a method for constructing a horizontal well heterogeneous formation interpretation model provided by an embodiment of the present invention, in one embodiment, the aforementioned selecting a target layer includes: selecting a marker layer as the target layer according to a logging response characteristic.

[0058] When implementing a method for constructing a horizontal well heterogeneous formation interpretation model provided by an embodiment of the present invention, in one embodiment, the aforementioned selection of a target layer further includes: selecting the target layer according to the purpose of drilling.

[0059] In the embodiment, the selection of the target layer mainly includes two aspects: one is to select the marker layer as the target layer according to the logging response characteristics, and the other is to select the target layer according to the drilling purpose. For a horizontal well, according to the drilling purpose, the target layer is a relatively clear layer or layers, and in some cases where the logging response characteristics are relatively obvious, the marker layer is also used as the target layer for executing the method.

[0060] When specifically implementing a method for constructing a horizontal well heterogeneous formation interpretation model provided by an embodiment of the present invention, in one embodiment, after selecting the target layer, the reservoir logging parameter value corresponding to the target layer is selected from the multi-well data in the work area where the horizontal well is located, wherein the method for selecting the reservoir logging parameter value corresponding to the target layer includes the average value, the half-width point method value, the maximum value, etc.

[0061] When implementing a method for constructing a horizontal well heterogeneous formation interpretation model provided by an embodiment of the present invention, in one embodiment, the aforementioned determination of the same-layer interpolation grid size according to the reservoir logging parameter value includes:

[0062] According to the reservoir logging parameter values, horizontal well data on the same layer are obtained, and histogram analysis is performed to determine the range of reservoir anisotropy;

[0063] The minimum distance of anisotropy change is selected from the reservoir anisotropy variation range as the same-layer interpolation grid size.

[0064] In the embodiment, the interpolation grid size of the same layer depends on the precision of the anisotropic modeling. It mainly includes: according to the reservoir logging parameter value, the horizontal well data on the same layer is obtained, and the histogram analysis is performed to establish the reservoir anisotropic reservoir variation range; the minimum distance in the reservoir anisotropic reservoir variation range is found by using the curve as the interpolation grid size of the same layer.

[0065] Figure 4 This is a histogram anisotropy difference comparison diagram of a method for constructing a horizontal well heterogeneous formation interpretation model in an embodiment of the present invention. Generally, for a target layer, if the formation has various anisotropies or heterogeneity, the values ​​in the same formation may be inconsistent. For example, in the embodiment, the acoustic anisotropy size of the well is 8. Figure 4 shown. Figure 5 This is a schematic diagram of the anisotropy difference scale discrimination of a method for constructing a horizontal well heterogeneous formation interpretation model according to an embodiment of the present invention. From the curve, the range of variation in the same formation is about 100m. This value is an approximate value, which is mainly consistent with the grid scale in terms of scale. Figure 5 shown.

[0066] When implementing a method for constructing a horizontal well heterogeneous formation interpretation model provided by an embodiment of the present invention, in one embodiment, the interpolation range is determined based on the multi-well data of the work area where the horizontal well is located, including:

[0067] According to the multi-well data of the work area where the horizontal well is located, the minimum coordinate and the maximum coordinate of each well are obtained as the interpolation range.

[0068] In the embodiment, the interpolation range is determined based on the multi-well data in the work area where the horizontal well is located, mainly including:

[0069] According to the multi-well data of the work area where the horizontal well is located, the minimum coordinate (x, y) and the maximum coordinate (X, Y) of each well are obtained as the interpolation range.

[0070] When implementing a method for constructing a horizontal well heterogeneous formation interpretation model provided by an embodiment of the present invention, in one embodiment, the multi-well data of the work area where the horizontal well is located are interpolated according to the same-layer interpolation grid size, interpolation range and selected target layer to determine the three-dimensional formation attribute body, including:

[0071] According to the interpolation grid size, interpolation range and selected target layer of the same layer, the interpolation method is used to perform layer-by-layer interpolation on the multi-well data in the work area where the horizontal well is located to determine the three-dimensional attribute body of the formation; wherein, during interpolation, when there is seismic layer data, the attributes within the seismic layer are interpolated.

[0072] Figure 6The present invention is a schematic diagram of a three-dimensional attribute interpolation method for constructing a heterogeneous formation interpretation model for a horizontal well in an embodiment of the present invention to form a three-dimensional formation attribute body. In the embodiment, in order to establish a three-dimensional formation attribute body, the main process includes: according to the same-layer interpolation grid size, the interpolation range and the selected target layer, the multi-well data in the work area where the horizontal well is located are interpolated layer by layer using interpolation methods such as Kriging and minimum curvature radius to determine the three-dimensional formation attribute body; wherein, during interpolation, when there is seismic layer data, the attributes in the seismic layer are interpolated without the need for layer interpolation. wherein, interpolation includes attribute interpolation and layer interpolation; during interpolation, the logging curves interpolated in the multi-well data in the work area where the horizontal well is located are natural gamma curves and resistivity curves. In this embodiment, the Kriging interpolation method is selected, and the interpolation range is the maximum and minimum values ​​of all wells. The three-dimensional formation attribute body is formed through interpolation as shown in FIG. Figure 6 shown.

[0073] When implementing a method for constructing a horizontal well heterogeneous formation interpretation model provided by an embodiment of the present invention, in one embodiment, the aforementioned three-dimensional formation attribute body is segmented to determine a three-dimensional formation section, including:

[0074] The horizontal well trajectory is formed into a curtain surface;

[0075] Each segment of the curtain surface is tangent to the stratum, and the slice is sequentially tangent to each grid of the stratum three-dimensional attribute body to form a three-dimensional stratum slice.

[0076] Figure 7 Schematic diagram of a well trajectory surface of a method for constructing a horizontal well heterogeneous formation interpretation model according to an embodiment of the present invention. In the embodiment, the interpolated three-dimensional formation is segmented along the horizontal well trajectory. Specifically, the horizontal well trajectory is first formed into a curtain surface, such as Figure 7 shown. Figure 8 Schematic diagram of a three-dimensional formation slice of a method for constructing a horizontal well heterogeneous formation interpretation model according to an embodiment of the present invention. After the curtain surface is formed, each segment in the curtain surface is tangent to the formation, and the slice is sequentially tangent to each grid of the formation three-dimensional attribute body to form a three-dimensional formation slice. Figure 8 shown.

[0077] Fig. 9 The following is a schematic diagram of a stratigraphic cross section of a two-dimensional anisotropic stratigraphic model of a method for constructing a horizontal well heterogeneous stratigraphic interpretation model according to an embodiment of the present invention. Fig. 9 As shown in FIG. 1 , after forming a three-dimensional stratigraphic slice, the three-dimensional stratigraphic slice is unfolded along the well trajectory to determine a two-dimensional anisotropic stratigraphic model; the horizontal axis is displacement and the vertical axis is TVD depth. The unfolded two-dimensional anisotropic stratigraphic model is shown in FIG. Fig. 9When implementing a method for constructing a horizontal well heterogeneous formation interpretation model provided by an embodiment of the present invention, in one embodiment, a two-dimensional anisotropic formation model can be determined in the following manner:

[0078]

[0079] Among them, Offset is the offset; x i1 、x i2 is the x coordinate of the endpoint of the current segment; y i1 ,y i2 The y coordinate of the current endpoint segment.

[0080] The above-mentioned expressions for determining the two-dimensional anisotropic formation model are for illustration only. Those skilled in the art will appreciate that, during implementation, the above formula may be deformed in a certain form and other parameters or data may be added, or other specific formulas may be provided as needed. All of these variations should fall within the scope of protection of the present invention.

[0081] Fig.10 FIG. 1 is a schematic diagram of a horizontal well heterogeneous formation interpretation model output after adjustment according to a method for constructing a horizontal well heterogeneous formation interpretation model according to an embodiment of the present invention. Fig.10 As shown, when a method for constructing a horizontal well heterogeneous formation interpretation model provided by an embodiment of the present invention is specifically implemented, in one embodiment, the two-dimensional anisotropic formation model is adjusted according to the logging response characteristics to determine the horizontal well heterogeneous formation interpretation model, including:

[0082] According to the shape of the measured curve in the logging response characteristics, the stratigraphic interval position of the two-dimensional anisotropic stratigraphic model is adjusted, and the adjusted two-dimensional anisotropic stratigraphic model is output as a horizontal well heterogeneous stratigraphic interpretation model.

[0083] In the embodiment, the two-dimensional anisotropic formation model is adjusted according to the logging response characteristics to determine the horizontal well heterogeneous formation interpretation model, which may include:

[0084] According to the shape of the measured curve in the logging response characteristics, the stratigraphic interval position of the two-dimensional anisotropic stratigraphic model is adjusted, and the adjusted two-dimensional anisotropic stratigraphic model is output as a horizontal well heterogeneous stratigraphic interpretation model. The aforementioned adjustment of the stratigraphic interval position of the two-dimensional anisotropic stratigraphic model may include adding, deleting or modifying the stratigraphic interval position. Fig.10 The figure shows the adjusted output of the horizontal well heterogeneous formation interpretation model, which is used to interpret the horizontal well.

[0085] Fig.11 A schematic diagram of a computer device for running a method for constructing a horizontal well heterogeneous formation interpretation model implemented by the present invention, as shown in FIG. Fig.11 As shown, an embodiment of the present invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above-mentioned method for constructing a horizontal well heterogeneous formation interpretation model when executing the computer program.

[0086] An embodiment of the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for executing the above-mentioned method for constructing a horizontal well heterogeneous formation interpretation model.

[0087] The present invention also provides a device for constructing a horizontal well heterogeneous formation interpretation model in an embodiment, as described in the following embodiment. Since the principle of solving the problem by the device is similar to that of constructing a horizontal well heterogeneous formation interpretation model, the implementation of the device can refer to the implementation of a horizontal well heterogeneous formation interpretation model construction method, and the repeated parts will not be repeated.

[0088] Fig.12 FIG. 1 is a schematic diagram of a device for constructing a horizontal well heterogeneous formation interpretation model according to an embodiment of the present invention. Fig.12 As shown, the embodiment of the present invention also provides a device for constructing a horizontal well heterogeneous formation interpretation model, which may include:

[0089] The data acquisition module 1201 is used to acquire multi-well data of the work area where the horizontal well is located;

[0090] The reservoir logging parameter value module 1202 is used to select the target layer and select the reservoir logging parameter value corresponding to the target layer from the multi-well data in the work area where the horizontal well is located;

[0091] The same-layer interpolation grid size determination module 1203 is used to determine the same-layer interpolation grid size according to the reservoir logging parameter value;

[0092] The interpolation range determination module 1204 is used to determine the interpolation range according to the multi-well data of the work area where the horizontal well is located;

[0093] The three-dimensional formation attribute body determination module 1205 is used to interpolate the multi-well data of the work area where the horizontal well is located according to the same-layer interpolation grid size, interpolation range and selected target layer to determine the three-dimensional formation attribute body;

[0094] The three-dimensional stratigraphic section determination module 1206 is used to segment the three-dimensional stratigraphic attribute body and determine the three-dimensional stratigraphic section;

[0095] A two-dimensional anisotropic formation model determination module 1207 is used to expand the three-dimensional formation section along the well trajectory to determine the two-dimensional anisotropic formation model;

[0096] The horizontal well heterogeneous formation interpretation model determination module 1208 is used to adjust the two-dimensional anisotropic formation model according to the logging response characteristics to determine the horizontal well heterogeneous formation interpretation model.

[0097] When implementing a device for constructing a horizontal well heterogeneous formation interpretation model provided by an embodiment of the present invention, in one embodiment, the aforementioned data acquisition module is specifically used to:

[0098] Through the three-dimensional distribution map, the positional relationship between each adjacent well and the horizontal well is measured, and the wells whose distance to the horizontal well is within the set threshold range are selected;

[0099] Load logging data, formation data and seismic plane data as multi-well data for the work area where the horizontal well is located.

[0100] When implementing a device for constructing a horizontal well heterogeneous formation interpretation model provided by an embodiment of the present invention, in one embodiment, the aforementioned reservoir logging parameter numerical module is specifically used to select a marker layer as a target layer according to the logging response characteristics.

[0101] When implementing a device for constructing a horizontal well heterogeneous formation interpretation model provided by an embodiment of the present invention, in one embodiment, the aforementioned reservoir logging parameter numerical module is also used to: select a target layer according to the purpose of drilling.

[0102] When implementing a device for constructing a horizontal well heterogeneous formation interpretation model provided by an embodiment of the present invention, in one embodiment, the aforementioned same-layer interpolation grid size determination module is specifically used to:

[0103] According to the reservoir logging parameter values, horizontal well data on the same layer are obtained, and histogram analysis is performed to determine the range of reservoir anisotropy;

[0104] The minimum distance of anisotropy change is selected from the reservoir anisotropy variation range as the same-layer interpolation grid size.

[0105] When implementing a device for constructing a horizontal well heterogeneous formation interpretation model provided by an embodiment of the present invention, in one embodiment, the interpolation range determination module is specifically used to:

[0106] According to the multi-well data of the work area where the horizontal well is located, the minimum coordinate and the maximum coordinate of each well are obtained as the interpolation range.

[0107] When implementing a device for constructing a horizontal well heterogeneous formation interpretation model provided by an embodiment of the present invention, in one embodiment, the aforementioned formation three-dimensional attribute body determination module is specifically used to:

[0108] According to the interpolation grid size, interpolation range and selected target layer of the same layer, the interpolation method is used to perform layer-by-layer interpolation on the multi-well data in the work area where the horizontal well is located to determine the three-dimensional attribute body of the formation; wherein, during interpolation, when there is seismic layer data, the attributes within the seismic layer are interpolated.

[0109] When implementing a device for constructing a horizontal well heterogeneous formation interpretation model provided by an embodiment of the present invention, in one embodiment, the aforementioned three-dimensional formation section determination module is specifically used to:

[0110] The horizontal well trajectory is formed into a curtain surface;

[0111] Each segment of the curtain surface is tangent to the stratum, and the slice is sequentially tangent to each grid of the stratum three-dimensional attribute body to form a three-dimensional stratum slice.

[0112] When implementing a device for constructing a horizontal well heterogeneous formation interpretation model provided by an embodiment of the present invention, in one embodiment, the aforementioned two-dimensional anisotropic formation model determination module is specifically used to determine the two-dimensional anisotropic formation model in the following manner:

[0113]

[0114] Among them, Offset is the offset; x i1 、x i2 is the x coordinate of the endpoint of the current segment; y i1 ,y i2 The y coordinate of the current endpoint segment.

[0115] When implementing a device for constructing a horizontal well heterogeneous formation interpretation model provided by an embodiment of the present invention, in one embodiment, the aforementioned horizontal well heterogeneous formation interpretation model determination module is specifically used to:

[0116] According to the shape of the measured curve in the logging response characteristics, the stratigraphic interval position of the two-dimensional anisotropic stratigraphic model is adjusted, and the adjusted two-dimensional anisotropic stratigraphic model is output as a horizontal well heterogeneous stratigraphic interpretation model.

[0117] In summary, an embodiment of the present invention provides a method and device for constructing a heterogeneous formation interpretation model for a horizontal well, comprising: first, obtaining multi-well data of a work area where the horizontal well is located; then selecting a target layer, and selecting a reservoir logging parameter value corresponding to the target layer from the multi-well data of the work area where the horizontal well is located; then, determining the same-layer interpolation grid size according to the reservoir logging parameter value; continuing to determine the interpolation range according to the multi-well data of the work area where the horizontal well is located; next, interpolating the multi-well data of the work area where the horizontal well is located according to the same-layer interpolation grid size, the interpolation range and the selected target layer, and determining a three-dimensional formation attribute body; next, segmenting the three-dimensional formation attribute body to determine a three-dimensional formation section; next, unfolding the three-dimensional formation section along the well trajectory to determine a two-dimensional anisotropic formation model; finally, adjusting the two-dimensional anisotropic formation model according to the logging response characteristics to determine the heterogeneous formation interpretation model for the horizontal well. An embodiment of the present invention provides a method for constructing a horizontal well heterogeneous formation interpretation model for a heterogeneous formation. The method utilizes multi-well curve data, formation comparison and other information in a work area to construct a heterogeneous formation model through spatial three-dimensional interpolation, so that the interpretation model is more in line with the actual geological conditions. By using the embodiment of the present invention, a heterogeneous formation model can be constructed in clastic rock formations and shale reservoirs based on the differences in the response characteristics of the curves, thereby improving the construction and interpretation accuracy of the horizontal well formation model.

[0118] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0119] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0120] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0121] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0122] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for constructing a horizontal well heterogeneous formation interpretation model, characterized in that: include: Obtain multi-well data in the work area where the horizontal well is located; Select the target layer, and select the reservoir logging parameter value corresponding to the target layer from the multi-well data in the work area where the horizontal well is located; According to the reservoir logging parameter values, determine the interpolation grid size of the same layer; Determine the interpolation range based on the multi-well data in the work area where the horizontal well is located; According to the same-layer interpolation grid size, interpolation range and selected target layer, multi-well data in the work area where the horizontal well is located are interpolated to determine the three-dimensional attribute volume of the formation; Slice the three-dimensional stratigraphic attribute body to determine the three-dimensional stratigraphic section; Expand the three-dimensional stratigraphic section along the well trajectory to determine the two-dimensional anisotropic stratigraphic model; The two-dimensional anisotropic formation model is adjusted according to the logging response characteristics to determine the heterogeneous formation interpretation model for horizontal wells.

2. The method according to claim 1, characterized in that Obtain multi-well data for the work area where the horizontal well is located, including: Through the three-dimensional distribution map, the positional relationship between each adjacent well and the horizontal well is measured, and the wells whose distance to the horizontal well is within the set threshold range are selected; Load logging data, formation data and seismic plane data as multi-well data for the work area where the horizontal well is located.

3. The method according to claim 1, characterized in that Selecting the target layer includes: selecting the marker layer as the target layer according to the logging response characteristics.

4. The method according to claim 3, characterized in that Selecting the target layer also includes: selecting the target layer according to the purpose of drilling the well.

5. The method according to claim 1, characterized in that According to the reservoir logging parameter values, determine the interpolation grid size of the same layer, including: According to the reservoir logging parameter values, horizontal well data on the same layer are obtained, and histogram analysis is performed to determine the range of reservoir anisotropy; The minimum distance of anisotropy change is selected from the reservoir anisotropy variation range as the same-layer interpolation grid size.

6. The method according to claim 1, characterized in that According to the multi-well data in the work area where the horizontal well is located, the interpolation range is determined, including: According to the multi-well data of the work area where the horizontal well is located, the minimum coordinate and the maximum coordinate of each well are obtained as the interpolation range.

7. The method according to claim 1, characterized in that According to the interpolation grid size, interpolation range and selected target layer of the same layer, the multi-well data of the horizontal well work area are interpolated to determine the three-dimensional attribute volume of the formation, including: According to the interpolation grid size, interpolation range and selected target layer of the same layer, the interpolation method is used to perform layer-by-layer interpolation on the multi-well data in the work area where the horizontal well is located to determine the three-dimensional attribute body of the formation; wherein, during interpolation, when there is seismic layer data, the attributes within the seismic layer are interpolated.

8. The method according to claim 1, characterized in that The three-dimensional stratigraphic attribute body is segmented to determine the three-dimensional stratigraphic section, including: The horizontal well trajectory is formed into a curtain surface; Each segment of the curtain surface is tangent to the stratum, and the slice is sequentially tangent to each grid of the stratum three-dimensional attribute body to form a three-dimensional stratum slice.

9. The method according to claim 1, characterized in that The two-dimensional anisotropic formation model is determined as follows: Among them, Offset is the offset; x i1 、x i2 is the x coordinate of the endpoint of the current segment; y i1 ,y i2 The y coordinate of the current endpoint segment.

10. The method according to claim 1, characterized in that The two-dimensional anisotropic formation model is adjusted according to the logging response characteristics to determine the heterogeneous formation interpretation model of the horizontal well, including: According to the shape of the measured curve in the logging response characteristics, the stratigraphic interval position of the two-dimensional anisotropic stratigraphic model is adjusted, and the adjusted two-dimensional anisotropic stratigraphic model is output as a horizontal well heterogeneous stratigraphic interpretation model.

11. A device for constructing a horizontal well heterogeneous formation interpretation model, characterized in that: include: A data acquisition module, used to acquire multi-well data in the work area where the horizontal well is located; The reservoir logging parameter numerical module is used to select the target layer and select the reservoir logging parameter value corresponding to the target layer from the multi-well data in the work area where the horizontal well is located; The same-layer interpolation grid size determination module is used to determine the same-layer interpolation grid size according to the reservoir logging parameter value; An interpolation range determination module is used to determine the interpolation range based on multi-well data in the work area where the horizontal well is located; The three-dimensional formation attribute body determination module is used to interpolate the multi-well data of the work area where the horizontal well is located according to the same-layer interpolation grid size, interpolation range and selected target layer to determine the three-dimensional formation attribute body; A three-dimensional stratigraphic section determination module is used to segment the three-dimensional stratigraphic attribute body and determine the three-dimensional stratigraphic section; A two-dimensional anisotropic formation model determination module is used to expand the three-dimensional formation section along the well trajectory to determine the two-dimensional anisotropic formation model; The module for determining the interpretation model of the heterogeneous formation of the horizontal well is used to adjust the two-dimensional anisotropic formation model according to the logging response characteristics and determine the interpretation model of the heterogeneous formation of the horizontal well.

12. The device according to claim 11, characterized in that The data acquisition module is specifically used for: Through the three-dimensional distribution map, the positional relationship between each adjacent well and the horizontal well is measured, and the wells whose distance to the horizontal well is within the set threshold range are selected; Load logging data, formation data and seismic plane data as multi-well data for the work area where the horizontal well is located.

13. The device according to claim 11, characterized in that The reservoir logging parameter numerical module is specifically used to select the marker layer as the target layer according to the logging response characteristics.

14. The device according to claim 13, characterized in that The reservoir logging parameter numerical module is also used to select the target layer according to the purpose of drilling.

15. The device according to claim 11, characterized in that The same-layer interpolation grid size determination module is specifically used for: According to the reservoir logging parameter values, horizontal well data on the same layer are obtained, and histogram analysis is performed to determine the range of reservoir anisotropy; The minimum distance of anisotropy change is selected from the reservoir anisotropy variation range as the same-layer interpolation grid size.

16. The device according to claim 11, characterized in that The interpolation range determination module is specifically used for: According to the multi-well data of the work area where the horizontal well is located, the minimum coordinate and the maximum coordinate of each well are obtained as the interpolation range.

17. The device according to claim 11, characterized in that The module for determining the three-dimensional attributes of the stratum is specifically used for: According to the interpolation grid size, interpolation range and selected target layer of the same layer, the interpolation method is used to perform layer-by-layer interpolation on the multi-well data in the work area where the horizontal well is located to determine the three-dimensional attribute body of the formation; wherein, during interpolation, when there is seismic layer data, the attributes within the seismic layer are interpolated.

18. The device according to claim 11, characterized in that The three-dimensional stratigraphic section determination module is specifically used for: The horizontal well trajectory is formed into a curtain surface; Each segment of the curtain surface is tangent to the stratum, and the slice is sequentially tangent to each grid of the stratum three-dimensional attribute body to form a three-dimensional stratum slice.

19. The device according to claim 11, characterized in that The two-dimensional anisotropic formation model determination module is specifically used to determine the two-dimensional anisotropic formation model in the following manner: Among them, Offset is the offset; x i1 、x i2 is the x coordinate of the endpoint of the current segment; y i1 ,y i2 The y coordinate of the current endpoint segment.

20. The device according to claim 11, characterized in that The module for determining the interpretation model of heterogeneous formations in horizontal wells is specifically used for: According to the shape of the measured curve in the logging response characteristics, the stratigraphic interval position of the two-dimensional anisotropic stratigraphic model is adjusted, and the adjusted two-dimensional anisotropic stratigraphic model is output as a horizontal well heterogeneous stratigraphic interpretation model.

21. A computer 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 method according to any one of claims 1 to 10 is implemented.

22. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program for executing the method according to any one of claims 1 to 10.

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