CN105484735A - Method for evaluating coincidence rate of actual drilling borehole trajectory and design track - Google Patents

Abstract

The invention relates to a method for evaluating the coincidence rate of an actual drilling borehole trajectory and a design track, and belongs to the technical field of petroleum and gas drilling. The method comprises the steps that the actual drilling borehole trajectory and the design track are unified to a coordinate system by measuring the well mouth coordinate and altitude of the actual drilling borehole trajectory; then the well depth, well deviation and orientation of the actual drilling borehole trajectory are measured, the vertical depth, east-west coordinate and north-south coordinate of an actual drilling well are figured out and standardized to be fuzzy vectors, the close degrees between the fuzzy vectors of the vertical depth, east-west coordinate and north-south coordinate of the actual drilling well and the fuzzy vectors of the vertical depth, east-west coordinate and north-south coordinate of the corresponding design borehole track is calculated, finally, the average value of the close degrees is figured out, and the average close degree is used for evaluating the coincidence rate of the actual drilling borehole trajectory and the design borehole track. By means of the method, quantitative judgment is achieved, human active factors are overcome, and the coincidence rate of the actual drilling borehole trajectory and the design track is objectively reflected.

Description

The evaluation method of a kind of drilled wellbore trajectories and designed path coincidence rate

Technical field

The present invention relates to the evaluation method of a kind of drilled wellbore trajectories and designed path coincidence rate, belong to oil and gas well drilling technical field.

Background technology

In petroleum gas field, along with the progress of drilling technology, directional well, the drilling hole number of horizontal well and Multilateral Wells is progressively increasing, the design of borehole track is progressively complicated, Chinese patent literature ZL201110303599.2 " a kind of defining method of Mutiple Targets horizontal well borehole track " provides a kind of Mutiple Targets horizontal well borehole track defining method, give according to geological data, the method of geological logging data and geophysical logging data determination Mutiple Targets horizontal well borehole track, achieve the design of Mutiple Targets borehole track, can predict, Hole clean is progressively to complicated in the future, become more meticulous development.

But at present, evaluate directed unit in charge of construction the standard of hole trajectory control is also limited to whether hit, whether straight well section hole deviation exceed standard, lack drilling trajectory " globality " Evaluation.And drilled wellbore trajectories and designed path coincidence rate can reflect this " globality ", can be used as one of appraisal standards, drilled wellbore trajectories and designed path coincidence rate are exactly represent the drilled wellbore trajectories of a bite well and the matching degree of Drilling Design track, are also the ability and the index that characterize the accurate TRAJECTORY CONTROL of directed unit in charge of construction.At present, the correlative study that drilled wellbore trajectories and well-drilling borehole track design coincidence rate is rare, mainly also be in " qualitative " stage, " quantitatively " research is also considerably less, judged by examination personnel " qualitative ", certain mouthful well drilling trajectory is high with designed path coincidence rate, coincidence rate is higher, and coincidence rate is low etc., subjective factor is very large, lacks objectivity.

Summary of the invention

The object of this invention is to provide the evaluation method of a kind of drilled wellbore trajectories and designed path coincidence rate, large to solve existing evaluation method subjective factor, lack the problem of objectivity.

The present invention solves the problems of the technologies described above the evaluation method providing a kind of drilled wellbore trajectories and designed path coincidence rate, and this evaluation method comprises the following steps:

1) according to the well head height above sea level, mouth coordinate and the target coordinate that the provide design borehole track of drilling geology design;

2) measure the mouth coordinate of real drilling well, well head height above sea level and well track and calculate the vertical depth of real well-drilling borehole track, thing coordinate and north and south coordinate;

3) with step 2) in the vertical depth data that obtain be benchmark, corresponding thing coordinate and north and south coordinate in the borehole track designed by calculating;

4) respectively to step 2) and step 3) in the thing coordinate that obtains and north and south coordinate carry out standardization, and set up the fuzzy vector of corresponding thing coordinate and north and south coordinate according to standardization result;

5) calculate the approach degree of vertical depth fuzzy vector and designed path vertical depth fuzzy vector, calculate the real approach degree boring thing coordinate fuzzy vector and designed path thing coordinate fuzzy vector, and the real approach degree boring north and south coordinate fuzzy vector and designed path north and south coordinate fuzzy vector;

6) average of above-mentioned three approach degrees is got, using this average as the coincidence rate of drilled wellbore trajectories and designed path.

Described step 2) in coordinate be cartesian coordinate system, east-west direction is X-axis, and North and South direction is Y-axis, and gravity vertical direction is Z axis.

Described step 2) in real drilling measuring time the survey tool used comprise single-shot inclinometer, multiple shot tool, MWD and well logging inclinometer.

Described step 4) in accepted standard be treated to standard deviation standardization, standardization with extreme difference, extreme difference standardization and maximum value normalization in any one.

Described step 5) in approach degree be any one in lattice close-degree, Hamming approach degree, Euclid's approach degree, Measure Close Degree, minimax approach degree and minimum average B configuration approach degree.

Described step 5) in the design formulas of three approach degrees be:

$\mathrm{\σ}(H_0,H_1)=1-\frac{1}{n}\underset{i=1}{\overset{n}{\Σ}}|H_0\left(u_i\right)-H_1\left(u_i\right)|$

$\mathrm{\σ}(E_0,E_1)=1-\frac{1}{n}\underset{i=1}{\overset{n}{\Σ}}|E_0\left(u_i\right)-E_1\left(u_i\right)|$

$\mathrm{\σ}(N_0,N_1)=1-\frac{1}{n}\underset{i=1}{\overset{n}{\Σ}}|N_0\left(u_i\right)-N_1\left(u_i\right)|$

Wherein H ₀vertical depth fuzzy vector is bored, H for real ₁for designing the vertical depth fuzzy vector of borehole track, E ₀thing coordinate fuzzy vector is bored, E for real ₁for designing the thing coordinate fuzzy vector of borehole track, N ₀north and south coordinate fuzzy vector is bored, N for real ₁for designing the north and south coordinate fuzzy vector of borehole track, n is the phasor length of each fuzzy vector.

The invention has the beneficial effects as follows: the present invention by measuring the mouth coordinate of real wellbore trace and height above sea level, by drilled wellbore trajectories with the unification of design borehole track under a coordinate system; Then drilled wellbore trajectories well depth, hole deviation and orientation is measured, calculate the vertical depth of real drilling well, thing coordinate and north and south coordinate, and be standardized as fuzzy vector, calculate the approach degree with corresponding design borehole track vertical depth, thing coordinate and north and south coordinate fuzzy vector again, finally obtain the average of each approach degree, using this average approach degree as evaluating the coincidence rate of drilled wellbore trajectories with design borehole track.Present invention achieves the judgement of quantification, overcome artificial subjective factor, objectively respond the matching degree of drilling trajectory and designed path.

Accompanying drawing explanation

Fig. 1 is the flow chart of drilled wellbore trajectories and designed path coincidence rate evaluation method in the embodiment of the present invention;

Fig. 2 is drilled wellbore trajectories and the contrast schematic diagram designing borehole track in the embodiment of the present invention.

Detailed description of the invention

Below in conjunction with accompanying drawing, the specific embodiment of the present invention is further described.

The present invention is by measuring mouth coordinate and the height above sea level of drilled wellbore trajectories, by drilled wellbore trajectories with design borehole track unification under a coordinate system, by measuring drilled wellbore trajectories well depth, hole deviation and orientation, calculate vertical depth, thing coordinate and north and south coordinate, and be standardized as fuzzy vector, ask approach degree with corresponding designed path vertical depth, thing coordinate and north and south coordinate fuzzy vector, evaluate drilled wellbore trajectories and the coincidence rate designing borehole track with this.

The whole flow process of above-mentioned evaluation method as shown in Figure 1, is described in detail for the specific implementation process of HH74P11 well to the method in certain oil field below.

1. according to well head height above sea level, mouth coordinate, target spot seat design borehole track that drilling geology design provides.The design of borehole track can with reference to the patent document mentioned in background technology, and well head height above sea level, mouth coordinate and target coordinate that in the present embodiment, the design of HH74P11 drilling geology provides, in table 1.

The coordinate that table 1HH74P11 well geological design provides and height above sea level

Project	Well head	A target spot	B target spot
				X-coordinate	3930552.23	3930842	3931614.74
Y-coordinate	36423102.29	36423024.65	36422817.59
				Height above sea level/m	1402.71	-964.8	-967.2
Vertical depth/m	0	2367.51	2369.91

Carry out Hole clean according to the data in table 1, the parameter of the borehole track designed is as shown in table 2.

Table 2HH74P11 well design borehole track

2. utilize measuring apparatus to measure the mouth coordinate of real drilling well, height above sea level and well track.This enforcement is by going out handhold GPS measuring apparatus, record the real mouth coordinate of boring of HH74P11 as follows: X-coordinate is 3930552.23, Y-coordinate is 3642310.29, height above sea level is 1402.71m, the coordinate system adopted in this enforcement is cartesian coordinate system, east-west direction is X-axis, and North and South direction is Y-axis, and gravity vertical direction is Z axis; Survey tool comprises single-shot inclinometer, multiple shot tool, MWD, well logging inclinometer.By measuring hole deviation with brill MWD, the concrete survey data of the HH74P11 drilled wellbore trajectories obtained is as shown in table 3.

Table 3HH74P11 well WMD drilled wellbore trajectories

3. calculate according to obtaining real drilling parameter in step 2, utilize average angle method to obtain vertical depth, thing coordinate and north and south coordinate, concrete computational methods belong to very ripe prior art, no longer describe its computational process in detail here.

In the present embodiment, the result of calculation of HH74P11 well is as shown in table 4.

Show the vertical depth of 4HH74P11 well drilled wellbore trajectories, thing coordinate and north and south coordinate

4. pair reality is bored vertical depth, thing coordinate and north and south coordinate and is carried out standardization, and sets up the fuzzy vector of vertical depth, thing coordinate and north and south coordinate.Here standardization can adopt standard deviation standardization, standardization with extreme difference, extreme difference standardization and maximum value normalization in any one, this enforcements employing gradation standard, obtain result after standardization as shown in table 5.

Show the vertical depth of 5HH74P11 well drilled wellbore trajectories, thing coordinate and north and south standardization of coordinates

5. to bore vertical depth in fact for benchmark, calculate the design corresponding thing coordinate of borehole track and north and south coordinate, and carry out standardization to it, set up corresponding fuzzy vector, standardization means are with reference to step 4.Result in this enforcement after the thing coordinate of the design borehole track of HH74P11 well and north and south standardization of coordinates is as shown in table 6.Concrete design formulas is adopted to be:

Show the vertical depth of 6HH74P11 design borehole track, thing coordinate and north and south standardization of coordinates

6. calculating is bored vertical depth fuzzy vector in fact and is designed the approach degree of borehole track vertical depth fuzzy vector, bores approach degree, the real approach degree boring north and south coordinate fuzzy vector and design borehole track north and south coordinate fuzzy vector of thing coordinate fuzzy vector and design borehole track thing coordinate fuzzy vector in fact respectively.The calculating of approach degree can adopt in lattice close-degree, Hamming approach degree, Euclid's approach degree, Measure Close Degree, minimax approach degree and minimum average B configuration approach degree any one.This enforcement selects Hamming approach degree to calculate, and the real vertical depth fuzzy vector that bores is designated as H ₀, the vertical depth fuzzy vector of design borehole track is designated as H ₁; The real thing coordinate fuzzy vector that bores is designated as E ₀, the thing coordinate fuzzy vector of design borehole track is designated as E ₁; The real north and south coordinate fuzzy vector that bores is designated as N ₀, the north and south coordinate fuzzy vector of design borehole track is designated as N ₁.Approach degree computational engineering between each corresponding vector is as follows, and wherein, n is phasor length, and the vector length chosen in the present embodiment is 206.

$\mathrm{\σ}(H_0,H_1)=1-\frac{1}{n}\underset{i=1}{\overset{n}{\Σ}}|H_0\left(u_i\right)-H_1\left(u_i\right)|=1.0000$

$\mathrm{\σ}(E_0,E_1)=1-\frac{1}{n}\underset{i=1}{\overset{n}{\Σ}}|E_0\left(u_i\right)-E_1\left(u_i\right)|=0.9981$

$\mathrm{\σ}(N_0,N_1)=1-\frac{1}{n}\underset{i=1}{\overset{n}{\Σ}}|N_0\left(x\right)-N_1\left(u_i\right)|=0.9802$

Owing to being be benchmark with real vertical depth data of boring when the thing coordinate calculated in design borehole track and north and south coordinate, therefore real brill vertical depth fuzzy vector is equal with design borehole track vertical depth fuzzy vector, its approach degree is also perseverance is 1, calculates the real approach degree that bore vertical depth fuzzy vector and design borehole track vertical depth fuzzy vector so can not be used in here.

7. pair real bore vertical depth fuzzy vector and design vertical depth fuzzy vector approach degree, real bores thing coordinate fuzzy vector and design thing coordinate fuzzy vector approach degree and the real approach degree boring north and south coordinate fuzzy vector and design north and south coordinate fuzzy vector average, as the coincidence rate of drilled wellbore trajectories and designed path.Result of calculation is 0.9928, and namely drilled wellbore trajectories is 99.28% with design borehole track coincidence rate.Also can direct vision from Fig. 2, drilled wellbore trajectories is also very high with design coincidence rate, almost coincides together.

Utilize said method to oil gas field belonging to the branch company of North China, the horizontal well of saliva more than 300, the directional wells such as oil field, Red River, DaNiuDi gas field, Wei Bei oil field have carried out coincidence rate evaluation, all obtain the accreditation of Party A (North China branch company), Party B (wellbore construction unit), think that coincidence rate is scientific in evaluation, reasonable, and be a bore, achieve standardization.For specification site operation, carry out drilling engineering design in real earnest and have great importance.

It should be noted last that: above embodiment is the non-limiting technical scheme of the present invention in order to explanation only, although with reference to above-described embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that; Still can modify to the present invention or equivalent replacement, and not depart from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in the middle of right of the present invention.

Claims (6)

1. an evaluation method for drilled wellbore trajectories and designed path coincidence rate, is characterized in that, this evaluation method comprises the following steps:

1) according to the well head height above sea level, mouth coordinate and the target coordinate that the provide design borehole track of drilling geology design;

2) measure the mouth coordinate of real drilling well, well head height above sea level and well track and calculate the vertical depth of real well-drilling borehole track, thing coordinate and north and south coordinate;

3) with step 2) in the vertical depth data that obtain be benchmark, corresponding thing coordinate and north and south coordinate in the borehole track designed by calculating;

4) respectively to step 2) and step 3) in the thing coordinate that obtains and north and south coordinate carry out standardization, and set up the fuzzy vector of corresponding thing coordinate and north and south coordinate according to standardization result;

5) calculate the approach degree of vertical depth fuzzy vector and designed path vertical depth fuzzy vector, calculate the real approach degree boring thing coordinate fuzzy vector and designed path thing coordinate fuzzy vector, and the real approach degree boring north and south coordinate fuzzy vector and designed path north and south coordinate fuzzy vector;

6) average of above-mentioned three approach degrees is got, using this average as the coincidence rate of drilled wellbore trajectories and designed path.

2. the evaluation method of drilled wellbore trajectories according to claim 1 and designed path coincidence rate, is characterized in that, described step 2) in coordinate be cartesian coordinate system, east-west direction is X-axis, and North and South direction is Y-axis, and gravity vertical direction is Z axis.

3. the evaluation method of drilled wellbore trajectories according to claim 2 and designed path coincidence rate, it is characterized in that, described step 2) in real drilling measuring time the survey tool used comprise single-shot inclinometer, multiple shot tool, MWD and well logging inclinometer.

4. the evaluation method of drilled wellbore trajectories according to claim 1 and designed path coincidence rate, it is characterized in that, described step 4) in accepted standard be treated to standard deviation standardization, standardization with extreme difference, extreme difference standardization and maximum value normalization in any one.

5. the evaluation method of drilled wellbore trajectories according to claim 4 and designed path coincidence rate, it is characterized in that, described step 5) in approach degree be any one in lattice close-degree, Hamming approach degree, Euclid's approach degree, Measure Close Degree, minimax approach degree and minimum average B configuration approach degree.

6. the evaluation method of drilled wellbore trajectories according to claim 5 and designed path coincidence rate, is characterized in that, described step 5) in the design formulas of three approach degrees be:

$\mathrm{\σ}(H_0,H_1)=1-\frac{1}{n}\underset{i=1}{\overset{n}{\Σ}}|H_0\left(u_i\right)-H_1\left(u_i\right)|$

$\mathrm{\σ}(E_0,E_1)=1-\frac{1}{n}\underset{i=1}{\overset{n}{\Σ}}|E_0\left(u_i\right)-E_1\left(u_i\right)|$

$\mathrm{\σ}(N_0,N_1)=1-\frac{1}{n}\underset{i=1}{\overset{n}{\Σ}}|N_0\left(u_i\right)-N_1\left(u_i\right)|$

Wherein H ₀vertical depth fuzzy vector is bored, H for real ₁for designing the vertical depth fuzzy vector of borehole track, E ₀thing coordinate fuzzy vector is bored, E for real ₁for designing the thing coordinate fuzzy vector of borehole track, N ₀north and south coordinate fuzzy vector is bored, N for real ₁for designing the north and south coordinate fuzzy vector of borehole track, n is the phasor length of each fuzzy vector.