CN109899054A - Wellbore trace determines method and V-type well - Google Patents
Wellbore trace determines method and V-type well Download PDFInfo
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- CN109899054A CN109899054A CN201910134003.7A CN201910134003A CN109899054A CN 109899054 A CN109899054 A CN 109899054A CN 201910134003 A CN201910134003 A CN 201910134003A CN 109899054 A CN109899054 A CN 109899054A
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Abstract
The embodiment of the present invention provides a kind of wellbore trace and determines method and V-type well, belongs to drilling technology field.The wellbore trace determines that method includes: to carry out fine reservoir geology research to target reservoir, to obtain the geologic parameter of target reservoir；And according to the geologic parameter, determine wellbore trace, wherein, the position of the drill point of the wellbore trace is higher than the position of the wellbore trace drilled out a little, the drill point and it is described drill out the top for being a little respectively positioned on the target zone of the target reservoir, and at least two o'clock of the wellbore trace is located at the bottom of the target zone of the target reservoir.Drilling well is gone using the wellbore trace that the technical solution provided according to embodiments of the present invention determines, low, the drilling well small investment needed is required to technical equipment, and single well productivity can also be improved, expands the individual well drainage area of oil reservoir with multiple series of strata.
Description
Technical field
The present invention relates to drilling technology fields, determine method and V-type well more particularly to a kind of wellbore trace.
Background technique
Complex structural well is a kind of technology for having broad prospect of application, is that exploitation low-permeability oil deposit, difficulty adopt difficulty and employ storage
Amount and a kind of effective means for excavating remaining oil, the development of complex structural well bring huge effect to oil field development
Benefit is also brought to exploitation design completely new over the years.Complex structural well can be improved well yield, reduce manipulation cost, be significant
Improve the comprehensive benefit of oilfield prospecting developing.Current complex structural well mainly includes horizontal well, high angle hole and Multilateral Wells
Deng.
Horizontal well is that maximum hole angle reaches or approaches 90 ° (typically no less than 86 °), and remains certain in target zone
The complex structural well of the net horizontal section of length.Horizontal well has well completion interval longer than straight well, can generate and biggish rush down oil
Area, can be transformed the connectivity of oil reservoir, and horizontal well is primarily adapted for use in thin oil-gas Layer or fractured reservoirs.
Big inclined shaft is that the ratio between drilling well plagioclase and vertical depth are greater than 2, complex structural well of the hole angle at 60 ° to 86 °.Big inclined shaft is
The double targets of a well may be implemented using high-inclination directional well technology in a kind of Special Drilling Operation technology to grow up on the basis of directional well
Or more targets, drill longer oil reservoir well section, to a wide range controlled oil-bearing area, high angle hole primarily directed to longitudinal oil reservoir compared with
Single oil reservoir.
Multilateral Wells refer to that from main hole sidetracking goes out the well of two or more branch well cylinder.Multilateral Wells are suitable
Oil reservoir wider with oil reservoir range, relatively thin for oil-gas Layer, fractured reservoir, oil reservoir with multiple series of strata, the non-mean value oil reservoir of hyposmosis
Deng applicable.
Although well yield can be improved in horizontal well and high angle hole, it is primarily adapted for use in that oil reservoir is relatively thin and oil reservoir is opposite collects
In oil reservoir, for the oil reservoir of multilayer system, horizontal well or big deviated well drilling then have that oil reservoir utilization rate is low, oil reservoir development degree
Low disadvantage.Although Multilateral Wells comparison is suitble to oil reservoir with multiple series of strata, there are production capacities to interfere for branch hole drilling, drilling well investment greatly with
And to drilling well, complete well and the high disadvantage of production technology equipment requirement.
Summary of the invention
The purpose of the embodiment of the present invention is that providing a kind of wellbore trace determines method and V-type well, for solving above-mentioned technology
One or more of problem.
To achieve the goals above, the embodiment of the invention provides a kind of wellbore traces to determine method, which comprises
Fine reservoir geology research is carried out to target reservoir, to obtain the geologic parameter of target reservoir；And according to the geologic parameter,
Determine wellbore trace, wherein the position of the drill point of the wellbore trace is higher than the position of the wellbore trace drilled out a little, institute
It states drill point and described drills out the top for being a little respectively positioned on the target zone of the target reservoir, and at least the two of the wellbore trace
Point is located at the bottom of the target zone of the target reservoir.
Optionally, the geologic parameter includes: the purpose of horizon of target reservoir, stratigraphic dip, core intersection.
Optionally, the wellbore trace is determined by A target spot, B target spot, C target spot and D target spot, wherein the A target spot and institute
The top for the target zone that D target spot is located in the target reservoir is stated, the B target spot and C target spot are located in the target reservoir
The bottom of target zone, the B target spot and the C target spot between the A target spot and the D target spot, and the C target spot with
Row is level with the ground in straight line where the connecting line of the D target spot.
Optionally, the method also includes: the brill between the B target spot and the C target spot is determined according to drilling tool build angle rate
Well track.
Optionally, the D target spot is that wellbore trace level after the C target spot drills out the target zone, and with
Intersection point at the top of the target zone.
Optionally, the B target spot drills out the bottom of the target zone of the target reservoir.
Optionally, straight line where the connecting line of the A target spot and B target spot and the angular range between earth plumb line are
30 ° to 40 °.
Correspondingly, the embodiment of the present invention also provides a kind of V-type well, the wellbore trace of the V-type well is by any one of above-mentioned
The wellbore trace determines that method determines.
Through the above technical solutions, the geologic structure using target reservoir sets wellbore trace, and provided by the invention
Wellbore trace can expand individual well drainage area for oil reservoir with multiple series of strata, effectively improve single well productivity.
The other feature and advantage of the embodiment of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Attached drawing is to further understand for providing to the embodiment of the present invention, and constitute part of specification, under
The specific embodiment in face is used to explain the present invention embodiment together, but does not constitute the limitation to the embodiment of the present invention.Attached
In figure:
Fig. 1 is the flow chart that wellbore trace provided in an embodiment of the present invention determines method；
Fig. 2 is wellbore trace provided in an embodiment of the present invention；
Fig. 3 is wellbore trace provided in an embodiment of the present invention.
Specific embodiment
It is described in detail below in conjunction with specific embodiment of the attached drawing to the embodiment of the present invention.It should be understood that this
Locate described specific embodiment and be merely to illustrate and explain the present invention embodiment, is not intended to restrict the invention embodiment.
Fig. 1 is the flow chart that wellbore trace provided in an embodiment of the present invention determines method.As shown in Figure 1, described kind of drilling well
Track determines that method includes: to carry out fine reservoir geology research to target reservoir, to obtain the geologic parameter of target reservoir；And
According to the geologic parameter, wellbore trace is determined.Wherein, the position of the drill point of the wellbore trace is higher than wellbore trace
Drill out position a little, the drill point and it is described drill out the top for being a little respectively positioned on the target zone of the target reservoir, and it is described
At least two o'clock of wellbore trace should be located at the bottom of the target zone of the target reservoir.
Wherein, described that fine reservoir sites geological research is carried out to target reservoir, related Oil Reservoir Types, sand body can be obtained
The various geologic parameters in relation to target reservoir such as geometric shape, energy storage parameter, gap structure.And for technology provided by the present application
For scheme, mainly determine that the purpose of horizon in relation to target reservoir, stratigraphic dip and core intersection can determine wellbore trace.
Wellbore trace provided in an embodiment of the present invention determines method, can use stratigraphic dip, can be oil reservoir with multiple series of strata
Expand individual well and rush down pasta product, improves recovery ratio.
In technical solution provided in an embodiment of the present invention, wellbore trace, two of them point are mainly determined by four points
Drill point and to drill out a little, and drill point and the top for a little being located at the target zone of target reservoir is drilled out, in addition two o'clock is located at target
The bottom of the target zone of oil reservoir, it is a wellbore trace that this 4 points are connected with smooth curve.
Technical solution provided in an embodiment of the present invention is explained in detail in conjunction with Fig. 2.As shown in Fig. 2, this embodiment of the invention mentions
There are three oil reservoir, top oil reservoir, middle part oil reservoir and bottom oil layers for the target reservoir of confession.For the brill of target reservoir shown in Fig. 2
Well track is from A target spot to the smooth curve of D target spot, and specific determination process is as follows.
Firstly, it is necessary to first determine that drill point A target spot is located in the well pattern region of target reservoir, specific location can arbitrarily be set
It is fixed, but A target spot is needed positioned at the top of top oil reservoir.
Next the position for drilling out point D target spot is determined.Firstly, D target spot is located at the top of top oil reservoir, and the position of A target spot
Set the position for being higher than D target spot.Wherein, the distance between the A target spot and D target spot can be by those skilled in the art according to mesh
Mark the geological research result and actual needs sets itself of oil reservoir.
In drill point A target spot and drills out and also need that two target spots, respectively B target spot and C target spot are arranged between point D target spot.
Wherein, straight line where the connecting line of C target spot and D target spot needs parallel to the ground or less parallel, and C target spot needs are located at
The bottom of bottom oil layer can accurately determine the position of C target spot on this basis.That is, the D target spot is described
Wellbore trace level after the C target spot drills out target zone, and the intersection point with the top of the top oil reservoir in target zone.
Wherein, B target spot can any position between A target spot and C target spot, it is only necessary to meet B target spot and be located at bottom
The bottom of oil reservoir.
Further, it is contemplated that if the arc curvature of a curve between B target spot and C target spot is excessive, it will increase difficulty of construction, and
And in construction, different drilling tools can also have different build angle rates, therefore should be on the basis of meeting drilling tool build angle rate, root
The position of B target spot is rationally set according to the position of A target spot and the position of C target spot.
The wellbore trace finally designed can be with as shown in Fig. 2, the wellbore trace approximation be V-shaped, but brill shown in Fig. 2
Well track is not that uniquely, last wellbore trace is by A target spot, B target spot, C target spot and D target spot, this four target spots are comprehensive
It determines.
Further, Strata Comparison is carried out for the ease of the later period, it should be ensured that B target spot drills out the bottom of bottom oil layer.
Optionally, straight line where the connecting line of A target spot and B target spot and the angular range between earth perpendicular be 30 ° extremely
40 °, in order to improve oil productivity.
In addition, the position for determining A target spot, B target spot, C target spot and D target spot and its between the positional relationships such as angular relationship
After, in drilling process, therefore, to assure that the smooth excessive and hole curvature in track is uniform.
Method is determined using wellbore trace provided in an embodiment of the present invention, can effectively improve single well productivity, expands multilayer
It is the individual well drainage area of oil reservoir.In addition, the drilling well investment that wellbore trace provided by the invention determines that method needs is little, to life
It is of less demanding at technical equipment, it is proved by experimental study, control reserve cost (development cost/control reserve) can be made to compare
Conventional well low 25% to 50%.
In addition, the present invention also provides a specific embodiments to explain technical solution provided by the invention, as shown in Figure 3.
In certain oil field, wellbore trace provided by the invention is determined that method is applied, can effectively improve the oil
The single well productivity of the Y21 block in field, moreover it is possible to expand individual well drainage area.
Specifically, determining after carrying out fine reservoir geology research to Y21 block, the main oil-bearing layer position of the block is E1k2 2、
E1k2 3Oily group, 25 ° of stratigraphic dip or so, formation thickness range 200m-350m, sandstone thickness range 40m-120m.
As shown in connection with fig. 3, the position of tetra- target spots of A, B, C, D is devised, drill point A target spot is E1k2 2You Zuding circle, D target
Point is also E1k2 2You Zuding circle, B target spot are E1k2 3You Zudi circle, wellbore trace drill out E by B target spot1k2 3Oily group, meeting drilling tool
In the case that build angle rate requires, target spot C is again from E1k2 3You Zudi circle enters stratum, utilizes stratigraphic dip, level of approximation later
Well drilling well, drills out E1k2 2You Zuding circle.Dotted line in Fig. 3 is determining wellbore trace.
Test proves that the technical know-how and practical combine achieve extraordinary application effect.
Correspondingly, one embodiment of the invention also provides a kind of V-type well, the track of the V-type well is by the drilling well described among the above
Track determines that method determines, and the V-type well also has big, the high advantage of oil productivity of rushing down pasta product.
The optional embodiment of the embodiment of the present invention is described in detail in conjunction with attached drawing above, still, the embodiment of the present invention is simultaneously
The detail being not limited in above embodiment can be to of the invention real in the range of the technology design of the embodiment of the present invention
The technical solution for applying example carries out a variety of simple variants, these simple variants belong to the protection scope of the embodiment of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, the embodiment of the present invention pair
No further explanation will be given for various combinations of possible ways.
It will be appreciated by those skilled in the art that implementing the method for the above embodiments is that can pass through
Program is completed to instruct relevant hardware, which is stored in a storage medium, including some instructions are used so that single
Piece machine, chip or processor (processor) execute all or part of the steps of each embodiment the method for the application.And it is preceding
The storage medium stated includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory
The various media that can store program code such as (RAM, Random Access Memory), magnetic or disk.
In addition, any combination can also be carried out between a variety of different embodiments of the embodiment of the present invention, as long as it is not
The thought of the embodiment of the present invention is violated, equally should be considered as disclosure of that of the embodiment of the present invention.
Claims (8)
1. a kind of wellbore trace determines method, which is characterized in that the described method includes:
Fine reservoir geology research is carried out to target reservoir, to obtain the geologic parameter of target reservoir；And
According to the geologic parameter, wellbore trace is determined,
Wherein, the position of the drill point of the wellbore trace is higher than the position of the wellbore trace drilled out a little, the drill point
It is a little respectively positioned on the top of the target zone of the target reservoir with described drill out, and at least two o'clock of the wellbore trace is located at institute
State the bottom of the target zone of target reservoir.
2. wellbore trace according to claim 1 determines method, which is characterized in that the geologic parameter includes: target oil
The purpose of horizon of hiding, stratigraphic dip, core intersection.
3. wellbore trace according to claim 1 determines method, which is characterized in that the wellbore trace is by A target spot, B target
Point, C target spot and D target spot are determining,
Wherein, the A target spot and the D target spot are located at the top of the target zone in the target reservoir, the B target spot and C target
Point is located at the bottom of the target zone in the target reservoir, and the B target spot and the C target spot are located at the A target spot and the D target
Between point, and row is level with the ground in straight line where the connecting line of the C target spot and the D target spot.
4. wellbore trace according to claim 3 determines method, which is characterized in that the method also includes:
The wellbore trace between the B target spot and the C target spot is determined according to drilling tool build angle rate.
5. wellbore trace according to claim 3 determines method, which is characterized in that the D target spot is the wellbore trace
Level drills out the target zone after the C target spot, and with the intersection point at the top of the target zone.
6. wellbore trace according to claim 3 determines method, which is characterized in that the B target spot drills out the target oil
The bottom of the target zone of hiding.
7. wellbore trace according to claim 3 determines method, which is characterized in that the connecting line of the A target spot and B target spot
Angular range between place straight line and earth plumb line is 30 ° to 40 °.
8. a kind of V-type well, which is characterized in that the wellbore trace of the V-type well is by drilling well of any of claims 1-7
Track determines that method determines.
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| CN201910134003.7A CN109899054A (en) | 2019-02-22 | 2019-02-22 | Wellbore trace determines method and V-type well |
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| CN201910134003.7A CN109899054A (en) | 2019-02-22 | 2019-02-22 | Wellbore trace determines method and V-type well |
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