Engineering investigation method for inclined drilling in combination with live-action three dimensions

Abstract

The invention provides an engineering investigation method for inclined drilling in combination with live-action three dimensions, which comprises the following steps of: searching a construction area meeting a construction condition in an exploration target area fusing underground structures and exploration target area information and a calibrated live-action three-dimensional model around the exploration target area; according to the position relation between the exploration target area and the construction area, an inclined drilling scheme is determined, the positions of a hole opening and an exploration point are designed, an inclined drill hole meeting the requirement for a safe distance from the underground structure is designed, the drilling direction, the drilling inclination angle and the drilling footage are calculated, inclined drilling is carried out, geological exploration testing is carried out in the hole, and a map is formed. According to the method, the geological condition of the working position where conventional vertical drilling cannot be carried out can be more accurately found out by utilizing the live-action three-dimensional model, and the construction risk caused by the complex geological condition is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of geological exploration, and particularly to an engineering exploration method for inclined drilling combined with real scene three - dimension. Background Technique

[0002] With the continuous development of cities, the scope of urban built - up areas is constantly expanding. Affected by above - ground and underground structures, conventional vertical drilling work cannot be carried out at the established surface drilling positions within the built - up areas. Therefore, a method of appropriately adjusting the surface drilling positions and combining geophysical prospecting tests is usually adopted to infer the geological conditions of the exploration target area. If the geological conditions of the exploration target area are complex and the regularity of stratum development is poor, the inference results of the above method will have a relatively large error and it is difficult to reveal the geological conditions of the exploration target area. At the same time, in recent years, as a new type of infrastructure, real - scene three - dimensional models are becoming increasingly perfect, and can truly, stereoscopically and time - sequentially reflect the surface space state, with characteristics such as convenience, readability and operability. At present, they are gradually assisting in the work of the traditional exploration industry.

[0003] Therefore, in order to obtain the geological conditions of the exploration target area, for the surface drilling positions where conventional vertical drilling work cannot be carried out, an engineering exploration method for inclined drilling combined with real - scene three - dimension needs to be established. Summary of the Invention

[0004] To solve the problems existing in the prior art, the present invention provides an engineering exploration method for inclined drilling combined with real - scene three - dimension, including:

[0005] S1, obtaining the calibrated real - scene three - dimensional model of the target area and its surrounding areas, and fusing the information of underground structures and the exploration target area;

[0006] S2, based on the fused three - dimensional model, finding the construction area that meets the construction conditions;

[0007] S3, determining the inclined drilling plan according to the positional relationship between the exploration target area and the construction area;

[0008] S4, establishing a three - dimensional coordinate, designing the orifice in the construction area according to the inclined drilling plan and evenly distributing exploration points in the exploration target area at intervals;

[0009] S5, connecting the orifice and the exploration points, designing the inclined drilling ZK n-n’ , calculating the distance between the inclined drilling ZK n-n’ and the underground structure to see if it meets the safety distance. If it does not meet the safety distance, go to step S3;

[0010] S6, calculating the drilling direction α n and the drilling dip angle β n, convert the drilling direction into the drilling direction in geographical azimuth;

[0011] S7, calculate the drilling footage L of each inclined borehole ZK n-n’ ; n ;

[0012] S8, conduct inclined drilling;

[0013] S9, after the drilling is completed, conduct geological exploration tests;

[0014] S10, according to the type of inclined borehole implementation plan, form maps of the geological information in the exploration area.

[0015] Specifically, in the above steps, there is also step S11, forming a 3D geological model of the geological conditions in the exploration target area and integrating the 3D geological model into the real-scene 3D model.

[0016] Specifically, the inclined borehole plan includes any one or any combination of end-point co-point type, lateral multi-point type, and lateral co-point type;

[0017] The end-point co-point type means that there is a construction area set at the end-point of the exploration target area, and one construction area corresponds to multiple exploration points;

[0018] The lateral multi-point type means that there is a construction area set on one side of the exploration target area, and each construction area corresponds to one exploration point;

[0019] The lateral co-point type means that there is a construction area set on one side of the exploration target area, and one construction area corresponds to multiple exploration points.

[0020] Specifically, in step S4, based on the 3D coordinate system, determine the central coordinates and elevations of the wellhead and the exploration points. The wellhead is at least one of O1(x1,y1,z1), ……, wellhead O n (x n ,y n ,z n ), and the exploration points are O1’(x1’,y1’,z1’), ……, exploration point O n ’(x n ’,y n ’,z n ’).

[0021] Specifically, in step S6, the calculation formula for the drilling direction α n is:

[0022] ;

[0023] The calculation formula for the drilling dip angle β n is:

[0024] .

[0025] Specifically, in step S7, the drilling footage is extended to a depth h below the exploration target area, and the drilling footage L n The calculation formula is:

[0026] .

[0027] Specifically, in step S10, the end point common point type inclined drilling holes form a vertical geological fan map; the lateral multi-point type inclined drilling holes form a geological cross-section map and a geological projection longitudinal section map; the lateral common point type inclined drilling holes form an oblique geological fan map and a geological projection longitudinal section map.

[0028] Specifically, the geological exploration test includes in-hole television, inclinometer, cross-hole CT test, wave velocity test, water pressure test, rock test, and geotechnical test.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The present invention uses a real-life 3D model that integrates underground structures and target areas to find construction areas and design inclined drilling holes. According to the positional relationship between the actual construction area and the target area, three types of inclined drilling schemes are proposed. At the same time, corresponding calculation formulas and geological maps are proposed to more accurately identify the geological conditions where conventional vertical drilling cannot be performed, thereby reducing the construction risks caused by complex geological conditions. The design scheme using a 3D model is more efficient and easy to read and communicate, and can better display the exploration results in an integrated 3D manner above and below the ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a flow chart of the present invention;

[0032] Figure 2 A schematic diagram of a realistic three-dimensional model that integrates underground structures and exploration target areas;

[0033] Figure 3 This is the front view of the end point common point inclined drilling plan;

[0034] Figure 4 It is a top view of the end point common point inclined drilling scheme;

[0035] Figure 5 It is a side view of the end point common point inclined drilling scheme;

[0036] Figure 6 This is a front view of the lateral multi-point inclined drilling plan;

[0037] Figure 7 It is a top view of the lateral multi-point inclined drilling plan;

[0038] Figure 8 It is a side view of the lateral multi-point type inclined drilling scheme;

[0039] Figure 9 It is a front view of the lateral common-point type inclined drilling scheme;

[0040] Figure 10 It is a top view of the lateral common-point type inclined drilling scheme;

[0041] Figure 11 It is a side view of the lateral common-point type inclined drilling scheme. Specific implementation manners

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0043] S1. Obtain the calibrated real-scene three-dimensional model of the target area and its surrounding areas, and fuse the information of underground structures and the exploration target area.

[0044] First, obtain the real-scene three-dimensional model of the exploration target area and its surrounding areas, whose coordinates and elevations have been calibrated, and fuse the information such as underground structures and the exploration target area into the real-scene three-dimensional model, as Figure 2 shown.

[0045] S2. Based on the fused three-dimensional model, find the construction area that meets the construction conditions.

[0046] Utilize the information of the fused real-scene three-dimensional model to find the construction area in the target area where inclined drilling construction can be carried out. The terrain of the construction area should be flat, and the long side direction should be consistent with the drilling direction.

[0047] S3. Determine the inclined drilling scheme according to the positional relationship between the exploration target area and the construction area.

[0048] According to the positional relationship between the exploration target area and the construction area, determine the inclined drilling scheme. The inclined drilling can be designed into three types of design schemes: the end-point common-point type, the lateral multi-point type, and the lateral common-point type. It is also possible to design the inclined drilling by arbitrarily combining the above three types.

[0049] Among them, for the end-point common-point type, the construction area is located at the end of the exploration target area, and one construction area corresponds to multiple exploration points. The three-view drawings are as Figure 3 , Figure 4 , Figure 5 shown; for the lateral multi-point type, the construction area is located on the side of the exploration target area, and one construction area corresponds to one exploration point. The three-view drawings are asFigure 6 , Figure 7 , Figure 8 as shown; the lateral concurrent point type means that the construction area is located on the side of the exploration target area, and one construction area corresponds to multiple exploration points. The three views are as shown in Figure 9 , Figure 10 , Figure 11 .

[0050] S4. Establish a three-dimensional coordinate system, design the orifice in the construction area according to the inclined drilling plan, and evenly distribute the exploration points in the exploration target area at intervals.

[0051] Preferably, the three-dimensional coordinate system takes the east-west direction of the geographical direction as the X-axis with the eastward direction as the positive direction, the north-south direction of the geographical direction as the Y-axis with the northward direction as the positive direction, and the vertical direction as the Z-axis with the upward direction as the positive direction.

[0052] Determine the coordinates and elevations of the orifices where inclined drilling can be implemented, and define them as orifice O1(x1, y1, z1), ……, orifice O n (x n , y n , z n ). According to the relevant exploration specifications, determine the spacing between the exploration points in the exploration target area, evenly distribute the exploration points at intervals, and determine their central coordinates and elevations, and define them as exploration point O1’(x1’, y1’, z1’), exploration point O2’(x2’, y2’, z2’), ……, exploration point O n ’(x n ’, y n ’, z n ’).

[0053] S5. Connect the orifice and the exploration points, design the inclined drilling ZK n-n’ , and calculate whether the distance between the inclined drilling ZK n-n’ and the underground structure meets the safety distance. If it does not meet the safety distance, go to step S2.

[0054] Design the inclined drilling ZK n with the connection lines of O1O1’, …… O n O n-n’ ’ points. As shown in Figures 3 - 5 , taking the end-point concurrent point type inclined drilling plan as an example, orifice O1 and orifice O2 are set at both ends of the exploration target area, and exploration points O1’, O2’, O3’, O4’, O5’, O6’ are set in the exploration target area. Connect O1O1’, O1O2’, O1O3’, O2O4’, O2O5’, O2O6’ to obtain six inclined drillings ZK 1-1’ , ZK 1-2’ , ZK 1-3’ , ZK 2-4’ , ZK2-5’ , ZK 2-6’ . Calculate the distances between the inclined boreholes ZK 1-1’ , ZK 1-2’ , ZK 1-3’ , ZK 2-4’ , ZK 2-5’ , ZK 2-6’ and the underground structures in sequence, and judge whether the safety distance of the distance between the inclined borehole ZK n-n’ and the underground structures is sufficient. If it is sufficient, the position of the hole mouth O n is suitable. If the safety distance is not met, repeat steps S3 and S4 to adjust the construction area or the inclined borehole plan.

[0055] S6. Calculate the drilling direction α n and the drilling dip angle β n of each designed inclined borehole, and convert the drilling direction into the drilling direction in geographical azimuth;

[0056] Drilling direction α n Calculation formula:

[0057] ;

[0058] Drilling dip angle β n Calculation formula:

[0059] .

[0060] S7. Calculate the drilling footage L n-n’ of each inclined borehole ZK n .

[0061] According to the relevant exploration specifications, extend the drilling footage to a certain depth h below the exploration target area, and calculate the drilling footage L n of each borehole to form the inclined boreholes ZK 1-1’ ~ ZK n-n’ .

[0062] Drilling footage L n Calculation formula:

[0063] .

[0064] S8. Conduct inclined drilling.

[0065] During the drilling process of the inclined borehole, it is necessary to calibrate the drilling dip angle by using an inclinometer or an in-hole TV device with inclinometer function.

[0066] S9. After the drilling is completed, conduct geological exploration tests.

[0067] After the drilling is completed, tests such as borehole television, inclinometry, cross-hole CT testing, wave velocity testing, water pressure testing, rock testing, and geotechnical testing can be carried out.

[0068] S10. According to the type of inclined borehole implementation plan, form maps of the geological information in the exploration area.

[0069] According to the type of inclined borehole implementation, form maps of the geological information in the exploration area. Among them, the end-point co-point type inclined borehole can form a vertical geological fan-shaped map, the lateral multi-point type inclined borehole can form a geological cross-section map and a geological projection longitudinal section map, and the lateral co-point type inclined borehole can form an oblique geological fan-shaped map and a geological projection longitudinal section map, or can also form a geological map based on a combined form.

[0070] S11. Form a three-dimensional geological model of the geological conditions in the exploration target area and integrate the three-dimensional geological model into the real-scene three-dimensional model.

[0071] Form a three-dimensional geological model of the geological conditions in the exploration target area, and then integrate the three-dimensional geological model into the real-scene three-dimensional model, which can realize the integrated three-dimensional display of surface information and underground information above and below the ground.

[0072] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An engineering survey method for inclined drilling combined with real-scene three-dimensional, characterized in that: include: S1, obtain a calibrated real-scene three-dimensional model of the exploration target area and its surroundings, and integrate the information of underground structures and the exploration target area; S2, based on the fused 3D model, find the construction area that meets the construction conditions; S3, determining an inclined drilling plan according to the positional relationship between the exploration target area and the construction area; S4, establishing three-dimensional coordinates, designing boreholes in the construction area according to the inclined drilling plan, and evenly distributing exploration points in the exploration target area according to the spacing; S5, connect the borehole and the exploration point, design the inclined drilling hole ZK n-n’ , calculate the inclined drilling ZK n-n’ Whether the distance to the underground structure meets the safety distance. If not, go to step S3; S6, calculate the drilling direction α of each designed inclined borehole n and drilling inclination angle β n , convert the drilling direction into the drilling direction under the geographical orientation; S7, calculate ZK of each inclined borehole n-n’ Drilling footage L n ; S8, conduct oblique drilling; S9, after drilling is completed, geological exploration and testing are carried out; S10, mapping the geological information of the survey area according to the type of inclined drilling implementation plan.

2. The engineering survey method for inclined drilling combined with real-scene three-dimensional according to claim 1 is characterized in that: The above steps also include step S11, forming a three-dimensional geological model based on the geological conditions of the exploration target area, and integrating the three-dimensional geological model into the real-scene three-dimensional model.

3. The engineering survey method for inclined drilling combined with real-scene three-dimensional according to claim 1 is characterized in that: The inclined drilling scheme includes any one of the end point common point type, lateral multi-point type, lateral common point type or any combination thereof; The endpoint common point type is that a construction area is set at the end point of the exploration target area, and one construction area corresponds to multiple exploration points; The lateral multi-point type is a construction area set on one side of the exploration target area, and each construction area corresponds to an exploration point; The lateral common point type is that a construction area is set on one side of the exploration target area, and one construction area corresponds to multiple exploration points.

4. The engineering survey method for inclined drilling combined with real-scene three-dimensional according to claim 1, characterized in that: In step S4, the center coordinates and elevation of the orifice and the exploration point are determined based on the three-dimensional coordinate system, wherein the orifice is O1 (x1, y1, z1), ..., orifice O n (x n ,y n ,z n ), wherein the exploration point is O1'(x1', y1', z1'), ..., exploration point O n '(x n ',y n ', z n ').

5. The engineering survey method for inclined drilling combined with real-scene three-dimensional according to claim 4 is characterized in that: In step S6, the drilling direction α n The calculation formula is: ； Drilling inclination angle β n The calculation formula is: 。 6. The engineering survey method for inclined drilling combined with real-scene three-dimensional according to claim 4 is characterized in that: In step S7, the drilling footage is extended to a depth h below the exploration target area. The drilling footage L n The calculation formula is: 。 7. The engineering survey method for inclined drilling combined with real-scene three-dimensional according to claim 3 is characterized in that: In step S10, the end point common point type inclined drilling holes form a vertical geological fan map; the lateral multi-point type inclined drilling holes form a geological cross-section map and a geological projection longitudinal section map; the lateral common point type inclined drilling holes form an oblique geological fan map and a geological projection longitudinal section map.

8. The engineering survey method for inclined drilling combined with real-scene three-dimensional according to claim 1, characterized in that: The geological exploration tests include in-hole television, inclinometer, cross-hole CT test, wave velocity test, water pressure test, rock test and geotechnical test.

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