CN104405284B - A kind of three-dimensional horizontal well leads a rail design method - Google Patents

Abstract

The present invention relates to a kind of three-dimensional horizontal well and lead a rail design method, belong to oil and gas well drilling technical field.First the present invention determines A target spot, B target spot according to geology logging data and geophysical logging data and leads coordinate and the vertical depth of a target spot, and determine horizontal segment drift azimuth successively and lead a target spot north and south coordinate and thing coordinate, then a target spot hole angle is led according to borehole track parameter with leading a target spot parameter calculating, and determine other the required parameter leading a track, finally according to determined by lead orbit parameter and realize three-dimensional horizontal well is led the design of a track.The present invention takes full advantage of main borehole well section when realizing and leading a track Quantitative design, it is to avoid waste drilling depth, simultaneously facilitates on-the-spot drilling well and orientation construction, reduces drilling engineering and claim cost.

Description

A kind of three-dimensional horizontal well leads a rail design method

Technical field

The present invention relates to a kind of three-dimensional horizontal well and lead a rail design method, belong to oil and gas well drilling technology neck Territory.

Background technology

In oil and gas well drilling technical field, in order to the environment that economizes the land resource, protects, reduction are drilled well This, meanwhile, in regions with complex terrain, in order to preferably realize well site deployment and select well site, former two-dimensional level Well does not the most adapt to requirement, needs to carry out three-dimensional horizontal well drilling.But for as Ordos Basin big NIUDI gas The oil gas fields such as field, Jing He oil field, Luo He oil field, its oil reservoir belongs to road, river deposition, and reservoir heterogeneity is strong, Typically implement three-dimensional horizontal well in the wellblock that well control degree is low, first need first to carry out leading a drilling well, determine that reservoir hangs down Deep position.

From oilfield drilling practices such as North China branch company exploitation DaNiuDi gas field, Jing He oil field, Luo He oil fields See, implement to lead eye and be conducive to the quasi-target zone of card, create favorable conditions for horizontal segment construction.But three-dimensional Horizontal Well Eye track is complicated, if it is the most increasingly complex to implement to lead a track, it is considered to factor is the most, and design and implementation gets up all More difficulty, there is presently no a kind of based on permanent tool-face model, designs simply, facilitates again the three-dimensional water implemented Horizontal well leads the method for designing of a track.

Summary of the invention

It is an object of the invention to provide a kind of three-dimensional horizontal well and lead a rail design method, to realize three-dimensional water The design leading a track of horizontal well.

The present invention solves that above-mentioned technical problem provides a kind of three-dimensional horizontal well to lead a rail design method, this sets Meter method comprises the following steps:

1) determine A target spot, B target spot according to geology logging data and geophysical logging data and lead a target spot Coordinate and vertical depth；

2) the drift azimuth φ of three-dimensional horizontal well horizontal segment is determined according to the coordinate of A target spot and B target spot₂, and root According to three-dimensional horizontal well mouth coordinate and lead a target coordinate and determine that horizontal well leads north and south coordinate Δ N and the east of a target spot Western coordinate Δ E；

3) according to main borehole orbit Design, determine from kickoff point (KOP) first two-dimentional lower curved section north and south coordinate Δ N₁And east Western coordinate Δ E₁, three-dimensional turn round north and south, orientation Jing Duan coordinate Δ N₂With thing coordinate Δ E₂And three-dimensional torsion orientation end point Hole angle α₂；

4) determine lead the two-dimentional steady tilted section segment length Δ L of eye backfill section, according to step 2) and step 3) in determine The two-dimentional steady tilted section segment length Δ L of parameter and backfill section calculates and leads a target spot hole angle α₃；

5) according to step 2)-4) in determined by lead each phase parameter three-dimensional horizontal well of design of a track and lead a rail Road.

Described the track of leading uses a straight well section to add two dimension lower curved section to add three-dimensional orientation well section of turning round and add two dimension steady tilted section and add Two dimension lower curved section, described straight well section, two dimension lower curved section and three-dimensional orientation well section of turning round are main boreholes and lead eye and share well Section, two dimension steady tilted section and two dimension steady tilted section are to lead eye backfill well section.

Described two dimension steady tilted section uses straight line model, two dimension lower curved section to use arc model, three-dimensional to turn round orientation well section Use permanent tool-face model.

Described step 4) in lead a target spot hole angle α₃Computing formula as follows:

$\mathrm{\Δ}L\sin {\mathrm{\α}}_2\cos {\mathrm{\φ}}_2+\frac{\cos {\mathrm{\α}}_2-\cos {\mathrm{\α}}_3}{K}\cos {\mathrm{\φ}}_2+\mathrm{\Δ}{N}_1+\mathrm{\Δ}{N}_2-\mathrm{\ΔN}=0$

$K=\frac{\mathrm{\ΔE}-\mathrm{\Δ}{E}_1-\mathrm{\Δ}{E}_2-\mathrm{\Δ}L\sin {\mathrm{\α}}_2\sin {\mathrm{\φ}}_2}{(\cos {\mathrm{\α}}_2-\cos {\mathrm{\α}}_3)\sin {\mathrm{\φ}}_2}$

Wherein Δ L is the two-dimentional steady tilted section segment length of backfill section, α₂Orientation end point hole angle, α is turned round for three-dimensional₃For Lead a target spot hole angle, Δ N₁For two dimension lower curved section north and south coordinate, Δ E₁For two dimension lower curved section thing coordinate, Δ N₂ North and south, orientation Jing Duan coordinate, Δ E is turned round for three-dimensional₂Orientation well section thing coordinate Δ E is turned round for three-dimensional₂, Δ N is horizontal well Leading the north and south coordinate of a target spot, Δ E is that horizontal well leads a target spot thing coordinate, φ₂Direction of deflection for horizontal segment Angle, K is for leading a hole curvature.

Described step 3) in lead a target spot the computing formula of thing coordinate Δ E and north and south coordinate Δ N as follows:

Δ E=Y_D-Y_o

Δ N=X_D-X_o

Wherein Δ E is the thing coordinate leading a target spot, and Δ N is the north and south coordinate leading a target spot, X_oIt is that well head X sits Mark, Y_oIt is well head Y coordinate, X_DIt is to lead a target spot X-coordinate, Y_DIt is to lead a target spot Y coordinate.

A described hole curvature K value of leading should be less than deflecting tool build angle rate and formation natural deflecting rate sum, otherwise The design of main borehole track need to be adjusted.

The drift azimuth φ of described three-dimensional horizontal well horizontal segment₂Computing formula as follows:

${\mathrm{\φ}}_2=\left\{\begin{array}{cc}\arctan \frac{Y_B-Y_A}{X_B-X_A}& (\frac{Y_B-Y_A}{X_B-X_A}>0)\\ \arctan \frac{Y_B-Y_A}{X_B-X_A}+2\mathrm{\π}& (\frac{Y_B-Y_A}{X_B-X_A}\≤0)\end{array}\right.$

Wherein X_AFor the X-axis coordinate of A target spot, Y_AFor the Y-axis coordinate of A target spot, X_BFor the X-axis coordinate of B target spot, Y_BFor B target spot Y-axis coordinate, arctan is arctan function.

The invention has the beneficial effects as follows: the present invention is first according to geology logging data and geophysical logging data Determine A target spot, B target spot and lead coordinate and the vertical depth of a target spot, and determining horizontal segment drift azimuth successively With lead a target spot north and south coordinate and thing coordinate, then according to borehole track parameter with lead a target spot parameter and calculate Lead a target spot hole angle, determine other parameter leading a track, finally according to determined by lead an orbit parameter Realize three-dimensional horizontal well is led the design of a track.Present invention achieves and three-dimensional horizontal well is led a track calmly Quantitative design, takes full advantage of main borehole well section in the design process, it is to avoid waste drilling depth, simultaneously facilitates existing Field drilling well and orientation construction, reduce drilling engineering and claim cost.

Accompanying drawing explanation

Fig. 1 is offset well log data in the embodiment of the present invention；

Fig. 2 is wellblock, embodiment of the present invention place sand thickness isogram；

Fig. 3 is to lead a borehole track vertical cross section in the embodiment of the present invention；

Fig. 4 is embodiment of the present invention Zhong Daoyan borehole track horizontal projection；

Fig. 5 is to lead well borehole track three coordinate diagram in the embodiment of the present invention.

Detailed description of the invention

Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is further described.

Below as a example by a bite three-dimensional horizontal well LH1-2-7P16 well leading-hole design of Ordos Basin Luo He oil field Illustrate that three-dimensional horizontal well of the present invention leads the detailed process of an orbit Design.The present embodiment is led an orbit Design adopt With " straight well section two dimension lower curved section three-dimensional turns round orientation well section two dimension steady tilted section+two dimension lower curved section " track, " straight Well section two dimension lower curved section three-dimensional turns round orientation well section " it is main borehole and leads eye and share well section, " two dimension steady tilted section+ Two dimension lower curved section " it is to lead eye backfill well section；

1. determine A target respectively according to LH1-2-7P16 well offset well geophysical logging data and geological logging data The coordinate of point and vertical depth, the coordinate of B target spot and vertical depth, the coordinate leading a target spot and vertical depth.Wherein A target spot is The first object point of three-dimensional horizontal well is also the starting point of net horizontal section, and B target spot is the second mesh of three-dimensional horizontal well Punctuate, geophysical logging data in the present embodiment is as it is shown in figure 1, geological logging data are as in figure 2 it is shown, root According to A target spot, B target spot determined by above-mentioned concrete data and the coordinate such as table 1 leading a target spot.

Table 1

Project	X	Y	Vertical depth (m)
				Well head	4002638.3	19340213.87	/
Lead a target spot	4002978.51	19339808.26	1152.8
				A target spot	4003028	19339801.13	1153.3
B target spot	4003720.84	19339701.29	1157.8

2. according to LH1-2-7P16 well A target coordinate, B target coordinate, calculate three-dimensional horizontal well horizontal segment Drift azimuth φ₂,

${\mathrm{\φ}}_2=\left\{\begin{array}{cc}\arctan \frac{Y_B-Y_A}{X_B-X_A}& (\frac{Y_B-Y_A}{X_B-X_A}>0)\\ \arctan \frac{Y_B-Y_A}{X_B-X_A}+2\mathrm{\π}& (\frac{Y_B-Y_A}{X_B-X_A}\≤0)\end{array}\right.$

Wherein X_AFor the X-axis coordinate of A target spot, Y_AFor the Y-axis coordinate of A target spot, X_BX for B target spot Axial coordinate, Y_BFor B target spot Y-axis coordinate, arctan is arctan function.The present embodiment is by A target spot and B The concrete coordinate of target spot is brought above-mentioned formula into and is calculated the drift azimuth φ of horizontal segment₂It it is 351.80 °.

3. according to the coordinate of LH1-2-7P16 well head, lead the coordinate of a target spot, determine that the south of a target spot led by this well North coordinate Δ N is 340.21m and thing coordinate Δ E is-405.61m；

Δ E=Y_D-Y_o

Δ N=X_D-X_o

Wherein Δ E is to lead a target spot thing coordinate, and unit is rice；Δ N is to lead a target spot north and south coordinate, and unit is Rice；X_oIt it is well head X-coordinate；Y_oIt it is well head Y coordinate；X_DIt is to lead a target spot X-coordinate；Y_DIt is to lead a target Point Y coordinate.

4., according to main borehole orbit Design, determine first two-dimentional lower curved section north and south coordinate Δ N₁With thing coordinate ΔE₁, three-dimensional turn round north and south, orientation Jing Duan coordinate Δ N₂With thing coordinate Δ E₂, three-dimensional turn round orientation end point hole angle α₂。

First two-dimentional lower curved section north and south coordinate Δ N of three-dimensional horizontal well LH1-2-7P16 well in the present embodiment₁For 2.25m, thing coordinate Δ E₁For-114.88, three-dimensional torsion north and south, orientation Jing Duan coordinate Δ N₂For 293.87m, thing Coordinate Δ E₂-398.93m, three-dimensional torsion orientation end point hole angle α₂It it is 75.50 °.

5. determine the two-dimentional steady tilted section segment length Δ L leading eye backfill section, according to leading target spot vertical depth and a sand thickness (as shown in Figure 2), in the present embodiment, the two-dimentional steady tilted section segment length Δ L of the section of backfill is 70m, calculates according to following formula Lead a target spot hole angle α₃It is 75.50 ° (namely two dimension increasing hole angle section is 0, and track is reduced to four sections of systems)；

$\mathrm{\Δ}L\sin {\mathrm{\α}}_2\cos {\mathrm{\φ}}_2+\frac{\cos {\mathrm{\α}}_2-\cos {\mathrm{\α}}_3}{K}\cos {\mathrm{\φ}}_2+\mathrm{\Δ}{N}_1+\mathrm{\Δ}{N}_2-\mathrm{\ΔN}=0$

$K=\frac{\mathrm{\ΔE}-\mathrm{\Δ}{E}_1-\mathrm{\Δ}{E}_2-\mathrm{\Δ}L\sin {\mathrm{\α}}_2\sin {\mathrm{\φ}}_2}{(\cos {\mathrm{\α}}_2-\cos {\mathrm{\α}}_3)\sin {\mathrm{\φ}}_2}$

Wherein Δ L is the two-dimentional steady tilted section segment length of backfill section, α₂Orientation end point hole angle, α is turned round for three-dimensional₃For Lead a target spot hole angle, Δ N₁For two dimension lower curved section north and south coordinate, Δ E₁For two dimension lower curved section thing coordinate, Δ N₂ North and south, orientation Jing Duan coordinate, Δ E is turned round for three-dimensional₂Orientation well section thing coordinate Δ E is turned round for three-dimensional₂, Δ N is horizontal well Leading the north and south coordinate of a target spot, Δ E is that horizontal well leads a target spot thing coordinate, φ₂Direction of deflection for horizontal segment Angle, K is for leading a hole curvature.

Hole curvature K need to ensure in the range of deflecting tool build angle rate with formation natural deflecting rate sum, otherwise Again main borehole track need to be designed.

The build angle rate of deflecting tool is to obtain according to the BHA deflecting ability prediction being designed to lead eye employing, ground Layer natural deflecting rate is predicted based on offset well data and is obtained, and in this enforcement, eye plan employing led by LH1-2-7P16 well " screw rod+MWD " orientation system, screw rod is 1.5 ° of single bend PDMs, it was predicted that the build angle rate of deflecting tool is 7.5 ° / 30m, bores data according to offset well LH1-2-17 well is real, and formation natural deflecting rate is at 0.6-0.9 °/30m.Visible In the present embodiment, hole curvature K is that 4.38 °/30m is in the range of instrument build angle rate and natural deflecting rate sum.

6. calculate and be designed horizontal well and lead other parameter of a track, be shown in Table 2:

Table 2

7. according to determined by be designed horizontal well and lead the parameter designing of a track and lead a track, in the present embodiment The three-dimensional horizontal well gone out designed by as procedure described above leads a track as it is shown in figure 5, this level leading a track is thrown As shown in Figure 4, vertical section is as shown in Figure 3 for shadow.

It should be noted last that: above example only with illustrate and not to limit technical scheme, Although being described in detail the present invention with reference to above-described embodiment, those of ordinary skill in the art should manage Solve；Still the present invention can be modified or equivalent, without departing from the spirit and scope of the present invention Any modification or partial replacement, it all should be contained in the middle of scope of the presently claimed invention.

Claims (7)

1. a three-dimensional horizontal well leads a rail design method, it is characterised in that this method for designing includes following Step:

1) determine A target spot, B target spot according to geology logging data and geophysical logging data and lead a target spot Coordinate and vertical depth；

2) the drift azimuth φ of three-dimensional horizontal well horizontal segment is determined according to the coordinate of A target spot and B target spot₂, and root According to three-dimensional horizontal well mouth coordinate and lead a target coordinate and determine that horizontal well leads north and south coordinate Δ N and the east of a target spot Western coordinate Δ E；

3) according to main borehole orbit Design, determine from kickoff point (KOP) first two-dimentional lower curved section north and south coordinate Δ N₁And east Western coordinate Δ E₁, three-dimensional turn round north and south, orientation Jing Duan coordinate Δ N₂With thing coordinate Δ E₂And three-dimensional torsion orientation end point Hole angle α₂；

4) determine lead the two-dimentional steady tilted section segment length Δ L of eye backfill section, according to step 2) and step 3) in determine The two-dimentional steady tilted section segment length Δ L of parameter and backfill section calculates and leads a target spot hole angle α₃；

5) according to step 2)-4) in determined by lead each phase parameter three-dimensional horizontal well of design of a track and lead a rail Road.

Three-dimensional horizontal well the most according to claim 1 leads a rail design method, it is characterised in that described Lead track to use a straight well section to add two dimension lower curved section to add three-dimensional orientation well section of turning round and add two dimension steady tilted section and add two dimension inclined shaft Section, described straight well section, two dimension lower curved section and three-dimensional orientation well section of turning round be main borehole and lead eye and share well section, two dimension Steady tilted section and two dimension lower curved section are to lead eye backfill well section.

Three-dimensional horizontal well the most according to claim 2 leads a rail design method, it is characterised in that described Two dimension steady tilted section uses straight line model, two dimension lower curved section to use arc model, three-dimensional orientation well section of turning round to use permanent work Tool surface model.

Three-dimensional horizontal well the most according to claim 3 leads a rail design method, it is characterised in that described Step 4) in lead a target spot hole angle α₃Computing formula as follows:

$\mathrm{\Δ}L{\mathrm{sin\α}}_2{\mathrm{cos\φ}}_2+\frac{{\mathrm{cos\α}}_2-{\mathrm{cos\α}}_3}{K}{\mathrm{cos\φ}}_2+{\mathrm{\ΔN}}_1+{\mathrm{\ΔN}}_2-\mathrm{\Δ}N=0$

$K=\frac{\mathrm{\Δ}E-{\mathrm{\ΔE}}_1-{\mathrm{\ΔE}}_2-\mathrm{\Δ}L{\mathrm{sin\α}}_2{\mathrm{sin\φ}}_2}{({\mathrm{cos\α}}_2-{\mathrm{cos\α}}_3){\mathrm{sin\φ}}_2}$

Wherein Δ L is the two-dimentional steady tilted section segment length of backfill section, α₂Orientation end point hole angle, α is turned round for three-dimensional₃For Lead a target spot hole angle, Δ N₁For two dimension lower curved section north and south coordinate, Δ E₁For two dimension lower curved section thing coordinate, Δ N₂ North and south, orientation Jing Duan coordinate, Δ E is turned round for three-dimensional₂Orientation well section thing coordinate Δ E is turned round for three-dimensional₂, Δ N is horizontal well Leading the north and south coordinate of a target spot, Δ E is that horizontal well leads a target spot thing coordinate, φ₂Direction of deflection for horizontal segment Angle, K is for leading a hole curvature.

Three-dimensional horizontal well the most according to claim 4 leads a rail design method, it is characterised in that described Step 3) in lead a target spot the computing formula of thing coordinate Δ E and north and south coordinate Δ N as follows:

Δ E=Y_D-Y_o

Δ N=X_D-X_o

Wherein Δ E is the thing coordinate leading a target spot, and Δ N is the north and south coordinate leading a target spot, X_oIt is that well head X sits Mark, Y_oIt is well head Y coordinate, X_DIt is to lead a target spot X-coordinate, Y_DIt is to lead a target spot Y coordinate.

Three-dimensional horizontal well the most according to claim 4 leads a rail design method, it is characterised in that described Lead a hole curvature K value and should be less than deflecting tool build angle rate and formation natural deflecting rate sum, otherwise need to adjust master The design of borehole track.

Three-dimensional horizontal well the most according to claim 4 leads a rail design method, it is characterised in that described The drift azimuth φ of three-dimensional horizontal well horizontal segment₂Computing formula as follows:

${\mathrm{\φ}}_2=\left\{\begin{array}{cc}arctan\frac{Y_B-Y_A}{X_B-X_A}& (\frac{Y_B-Y_A}{X_B-X_A}>0)\\ \arctan \frac{Y_B-Y_A}{X_B-X_A}+2\mathrm{\π}& (\frac{Y_B-Y_A}{X_B-X_A}\≤0)\end{array}\right.$

Wherein X_AFor the X-axis coordinate of A target spot, Y_AFor the Y-axis coordinate of A target spot, X_BFor the X-axis coordinate of B target spot, Y_BFor B target spot Y-axis coordinate, arctan is arctan function.