CN106907136A - A kind of method of construction building well - Google Patents
A kind of method of construction building well Download PDFInfo
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- CN106907136A CN106907136A CN201510968226.5A CN201510968226A CN106907136A CN 106907136 A CN106907136 A CN 106907136A CN 201510968226 A CN201510968226 A CN 201510968226A CN 106907136 A CN106907136 A CN 106907136A
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- 238000000034 method Methods 0.000 title claims abstract description 48
- 238000010276 construction Methods 0.000 title claims abstract description 25
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 40
- 230000035699 permeability Effects 0.000 claims description 17
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 230000009466 transformation Effects 0.000 abstract description 14
- 230000008901 benefit Effects 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 230000011218 segmentation Effects 0.000 description 5
- 230000018109 developmental process Effects 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Earth Drilling (AREA)
Abstract
The present invention relates to a kind of method of construction building well, including：First level face is built in formation at target locations；Multiple first level Multilateral Wells spaced apart are circumferentially set in the first level face；The second horizontal plane set in compartment in the vertical with the first level face is built in the formation at target locations；Multiple second horizontal branch wells spaced apart are circumferentially set in second horizontal plane, and cause that projection of each second horizontal branch well in the first level face forms the first angle between the adjacent first level Multilateral Wells respectively.The method of the construction building well has the advantages that oil pump capacity is more, oil yield efficiency is high and increases the transformation volume of formation at target locations.
Description
Technical field
The present invention relates to exploration of oil and gas field and development technique field, more particularly to a kind of construction building well method.
Background technology
At present, the exploitation hidden for unconventionaloil pool, is generally effectively developed by the way of volume fracturing,
The mode of volume fracturing is mainly using staged fracturing of horizontal well technology to complete.However, due to reservoir in itself
The restriction of characterisitic parameter and the requirement of fracturing technology parameter, even if the reservoir characterisitic parameter in itself and pressure break work
Skill parameter reaches capacity level, but be also still difficult to ensure that the branch fractures being connected with major fracture generation and
Effective support to the branch fractures.In other words, to the oil-gas reservoir of the Chinese generally existing such as hypotonic, many thin layers of spy
For type, existing horizontal well volume fracturing method is not met by the demand of Efficient Exploration Development and Production.
Based on the analysis to above-mentioned prior art, there is reservoir and go out in horizontal well volume fracturing method of the prior art
The low technical problem of oil mass.
The content of the invention
Regarding to the issue above, the method that a kind of construction building well is proposed according to the present invention, including：In formation at target locations
Middle structure first level face；Multiple first level branches spaced apart are circumferentially set in the first level face
Well；The second level set in compartment in the vertical with the first level face is built in the formation at target locations
Face；Multiple second horizontal branch wells spaced apart are circumferentially set in second horizontal plane, and cause each institute
State the second horizontal branch well in the first level face projection respectively with the adjacent first level branch
The first angle is formed between well.As can be seen here, the building well being configured to is significantly more than due to the quantity of horizontal branch well
The quantity of existing single horizontal well, therefore, considerably increase the transformation volume of formation at target locations, improve out
Oil mass, can well meet the demand of Efficient Development reservoir.Further, using the construction building well of the application
Method be applicable to the exploitation of the oil-gas reservoirs of type such as or many thin layers hypotonic to spy.
In embodiments herein, by causing projection of each second horizontal branch well in first level face point
Do not form the first angle between adjacent first level Multilateral Wells, just can avoid each first level Multilateral Wells and with
Its second horizontal branch well for being set in compartment in the vertical is connected.So, fuel-displaced body is just increased
Product, improves the oil pump capacity of formation at target locations.
In one embodiment, the formation at target locations is low permeability reservoir or Thief zone reservoir.
In one embodiment, the formation at target locations is low permeability reservoir, and methods described also includes respectively to each institute
Stating first level Multilateral Wells carries out staged fracturing, to construct multiple being spaced apart in each first level Multilateral Wells
The first crack.So, just considerably increase the transformation volume of formation at target locations, improve oil pump capacity.
In one embodiment, the formation at target locations is low permeability reservoir, and methods described also includes respectively to each institute
Stating the second horizontal branch well carries out staged fracturing, to construct multiple being spaced apart on each second horizontal branch well
The second crack.So, just considerably increase the transformation volume of formation at target locations, improve oil pump capacity.
In one embodiment, during multiple second cracks spaced apart of construction, each of construction is made
Projection of second crack in the first level face is formed between adjacent first crack respectively
Second angle.The formation of second angle, just can avoid the drawbacks of reducing oil pump capacity.
In one embodiment, methods described is also included respectively to injection support in each first level Multilateral Wells
Agent, with by causing that the proppant flow reduces the frictional resistance of first intersection part through the first intersection part,
Wherein, the position that each first crack crosses with the first level Multilateral Wells respectively is defined as described first
Intersection part.
In one embodiment, methods described is also included respectively to each first level Multilateral Wells and each described the
Two horizontal branch wells are cemented the well.So, just can play prevent first crack and the second crack of upper and lower layer by
In linking up each other, so as to cause the drawbacks of reducing the transformation volume of formation at target locations.
In one embodiment, methods described also includes respectively to injecting the branch in second horizontal branch well
Support agent, with by causing that the proppant flow reduces rubbing for second intersection part through the second intersection part
Resistance, wherein, the position that each second crack crosses with second horizontal branch well respectively is defined as described
Second intersection part.
In one embodiment, the magnitude range of first angle and second angle be more than 0 degree and
Less than or equal to 45 degree.
In one embodiment, each first level Multilateral Wells are placed equidistant in the first level face, respectively
Second horizontal branch well is placed equidistant in second horizontal plane.So, not only facilitate to formation at target locations
Fracturing reform is carried out, meanwhile, also greatly increase oil pump capacity.
According to the application, the method for the construction building well has that oil pump capacity is more, oil yield efficiency is high and increases target
The advantage of the transformation volume on stratum.
In addition, the present processes have increases each first crack in first level face and positioned at the
The advantage of the expanded range in each second crack in two horizontal planes, so that the oil production potential of formation at target locations is obtained
Fully play.
The present processes also have fracture pattern complicated, i.e. in first level face and be first water
The first crack and the second crack are configured with respectively in plane the second horizontal plane in the vertical in compartment setting, from
And the rate of regression of yield is controlled effectively after alloing to press.
Brief description of the drawings
The invention will be described in more detail below based on embodiments and refering to the accompanying drawings.In figure
In：
Fig. 1 is the schematic flow sheet of the method for the construction building well of embodiments herein.
Fig. 2 constructs first level point for the method for the construction building well of embodiments herein in first level face
The structural representation of Zhi Jing.
Fig. 3 is the schematic diagram that each first level Multilateral Wells are carried out with pressure break of Fig. 2.
Fig. 4 is the interior structural representation for constructing the second horizontal branch well respectively of second horizontal plane in the vertical of Fig. 2
Figure.
Fig. 5 is projection of second horizontal branch well in the first level face in Fig. 3 and adjacent described the
The schematic diagram of the first angle is formed between one horizontal branch well.
Fig. 6 is the schematic diagram that pressure break is carried out to the second horizontal branch well in the second horizontal plane of Fig. 4.
Projections and adjacent described first of the Fig. 7 for second crack in Fig. 6 in the first level face
The schematic diagram of the second angle is formed between crack.
Fig. 8 is the schematic diagram of the first intersection part.
Fig. 9 is the schematic diagram of the second intersection part.
In the accompanying drawings, identical part uses identical reference.Accompanying drawing is not retouched according to actual ratio
Paint.
Specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, Figure 4 and Figure 5, wherein, Fig. 1 schematically shows the method for the construction building well
Step.
In embodiments herein, the method comprising the steps of S410 builds first level in formation at target locations 1
Face 11.Wherein, the formation at target locations 1 is reservoir that can be fuel-displaced.
Step S420, circumferentially sets multiple first level Multilateral Wells spaced apart in first level face 11
111.So, increasing due to the quantity of first level Multilateral Wells 111 in same level, so as to improve
Oil pump capacity in first level face 11.
Step S430, builds with first level face 11 in the vertical in compartment setting in formation at target locations 1
Second horizontal plane 12.Preferably, the first level face 11 can be in the vertical relative type motor with the second horizontal plane 12
Set.
Step S440, circumferentially sets multiple second horizontal branch wells spaced apart in the second horizontal plane 12
121, and cause each second horizontal branch well in first level face 11 projection respectively with adjacent first level
The first angle theta is formed between Multilateral Wells1。So, increasing due to the quantity of the second horizontal branch well 121, so that
Improve the oil pump capacity in the second horizontal plane 12.
Further, since the horizontal plane 12 of first level face 11 and second is set in compartment in the vertical, thus,
Just realizing can be respectively provided with multiple horizontal branch wells on the different layers position of longitudinal direction, so as to complete the structure of building well
Make.As can be seen here, the building well being configured to existing single branch horizontal well because the quantity of horizontal branch well is significantly more than
Quantity, therefore, considerably increase the transformation volume of formation at target locations 1, improve oil pump capacity, can be fine
Ground meets the demand of Efficient Development reservoir.Further, it is applicable to using the method for the construction building well of the application
Exploitation to the oil-gas reservoir of the types such as special hypotonic or many thin layers.
In embodiments herein, by causing each second horizontal branch well 121 in first level face 11
Projection form the first angle theta between adjacent first level Multilateral Wells 111 respectively1, just can avoid each first
Horizontal branch well 111 and the second horizontal branch well 121 set in compartment in the vertical with it are connected.
So, fuel-displaced volume is just increased, the oil pump capacity of formation at target locations 1 is improve.Thus, it is possible to greatest extent
Ground excavates the potentiality of reservoir stimulation, to meet the volume increase of the volume fracturing of fine and close oil-gas reservoir and shale oil-gas reservoir
Need.
As shown in Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, in a preferred embodiment, the mesh
Mark stratum 1 is low permeability reservoir or Thief zone reservoir.Specifically, if the horizontal permeability of the formation at target locations 1 connects
Closely or equal to longitudinal permeability, then the formation at target locations 1 is Thief zone reservoir.So, due to Thief zone reservoir
Permeability is big, i.e. fluid (for example can be oil or natural gas etc.) is in above-mentioned each first level Multilateral Wells 111
It is stronger with fluid ability in each second horizontal branch well 121, such that it is able to meet the demand of oil pump capacity high.By
This, it is not necessary to staged fracturing is carried out to above-mentioned each first level Multilateral Wells 111 and each second horizontal branch well 121,
Just the demand to oil pump capacity can be met.
If the formation at target locations 1 is due to the influence of depositional environment, the vertical permeability for causing the formation at target locations 1 is remote
During far below horizontal permeability, then the formation at target locations 1 is low permeability reservoir.So, due to low permeability reservoir
Permeability is relatively low, i.e. fluid is in above-mentioned each first level Multilateral Wells 111 and each second horizontal branch well 121
Fluid ability it is weaker.Now, it is the mobility of raising fluid, then needs respectively to each first level Multilateral Wells 111
Staged fracturing is carried out with each second horizontal branch well 121.Further, it is ensured that in formation at target locations 1 and vertical
Upwards in each first level Multilateral Wells 111 in the first level face 11 of compartment setting and in the second level
The effective of each second horizontal branch well 121 in face 12 employs.
As shown in figure 3, in a preferred embodiment, the formation at target locations 1 is low permeability reservoir, the method
Also include carrying out staged fracturing to each first level Multilateral Wells 111 respectively, with each first level Multilateral Wells 111
Upper multiple first cracks 2 spaced apart of construction.So, just considerably increase formation at target locations 1 transformation volume,
Improve oil pump capacity.
As shown in fig. 6, in a preferred embodiment, the formation at target locations 1 is low permeability reservoir, the party
Method also includes carrying out staged fracturing to each well of second horizontal branch 121 respectively, with each second horizontal branch 121
Upper multiple second cracks 3 spaced apart of construction.So, just considerably increase formation at target locations 1 transformation volume,
Improve oil pump capacity.
As shown in fig. 7, in a preferred embodiment, in the mistake in multiple second cracks 3 spaced apart of construction
Cheng Zhong, make each second crack 3 of construction in first level face 11 projection respectively with the first adjacent crack 2
Between form the second angle theta2.So, the first level branch set in compartment on to longitudinal direction can just be avoided
When the horizontal branch well 121 of well 111 and second carries out pressure break, first be located in the first level face 11 is caused
The phenomenon that crack 2 and the second crack 3 in second horizontal plane 12 are communicated with each other.Further,
Avoid the drawbacks of reducing out oil yield.
In one embodiment, above-mentioned multiple first cracks 2 can carry out structure after above-mentioned steps S420 is completed
Make, above-mentioned multiple second cracks 3 can be constructed after above-mentioned steps S440 is completed.
In another embodiment, above-mentioned multiple first cracks 2 and multiple second cracks 3 can complete step
Constructed respectively again after S440, or construction simultaneously is carried out after above-mentioned steps S440 has been constructed.As can be seen here,
The present processes have the advantages that to facilitate fracturing reform formation at target locations 1, and also flexible with pressing crack construction
The good advantage of property.
In embodiments herein, the setting in above-mentioned multiple first cracks 2 and multiple second cracks 3, it is to avoid
Because the form in crack is single, the drawbacks of cause the rate of regression of oil pump capacity to be difficult to control to.
As shown in figure 8, in a preferred embodiment, the method also includes respectively to each first level branch
Injection proppant in well 111, with by causing that proppant flow reduces the first intersection through the first intersection part 4
The frictional resistance of position 4, wherein, the position definition that each first crack 2 is crossed with first level Multilateral Wells 111 respectively
It is first intersection part 4.Specifically, if the direction in the first crack 2 gone out by pressure break and first level branch
When the direction of well 111 is inconsistent, by the bending section of the first level Multilateral Wells 111 of pressure break, (this first crosses
Position 4) frictional resistance can increase, so as to the flow velocity for causing the fluid for flowing through first intersection part 4 can be greatly
Reduce.Thus, by injection proppant is segmented in the first level Multilateral Wells 111, such that it is able to reach drop
The purpose of the frictional resistance of low first intersection part 4.
In embodiments herein, the proppant can be the liquid containing sand.By the continuous of the liquid containing sand
Sand washing and first intersection part 4 of polishing, just can play the bore of the runner expanded in first intersection part 4
Effect, so as to be conducive to the flowing of fluid.
In addition, the concentration of the proppant and segmentation quantity can according to the height of the pressure on current goal stratum 1 come
It is determined that.That is, if the pressure on current goal stratum 1 is high, the quantity of segmentation can suitably be increased, to reduce the target
The pressure on stratum 1.Meanwhile, by reducing the concentration of proppant, such that it is able to improve the mobility of proppant,
To accelerate the polishing to first intersection part 4.Wherein, the segmentation refers to be injected into the first level Multilateral Wells
One section of proppant in 111 plus sand were not added with sand with that should add the adjacent segment of sand section.The quantity of segmentation can be according to target ground
Layer 1 current pressure values come specifically determine segmentation quantity.
In a preferred embodiment, the method also includes respectively to each first level Multilateral Wells 111 and Ge
Two horizontal branch wells 121 are cemented the well.So, just can play prevents the first crack 2 and second of upper and lower layer
Crack 3 due to linking up each other, so as to cause reduce formation at target locations 1 transformation volume the drawbacks of.
The cementing method be in well to formation at target locations 1 under enter sleeve pipe, after sleeve pipe is lowered into precalculated position, to
Injection cement in the annular space formed between the borehole wall and the sleeve pipe, so as to the annular space sealing of sleeve pipe and the borehole wall be got up,
To insulate oil-gas-water layer, the passage for making sleeve pipe lead in well as oil gas.
As shown in figure 9, in a preferred embodiment, the method also includes respectively to the second horizontal branch well
Injection proppant in 121, with by causing that proppant flow reduces by second intersection through the second intersection part 5
The frictional resistance of position 5, wherein, the position definition that each second crack 3 is crossed with the second horizontal branch well 121 respectively
It is the second intersection part 5.Specifically, if the direction in the second crack 3 gone out by pressure break and the second horizontal branch well
When 121 direction is inconsistent, by bending section (second intersection of second horizontal branch well 121 of pressure break
Position frictional resistance 5) can increase, so as to the flow velocity for causing the fluid for flowing through second intersection part 5 can be substantially reduced.
Thus, by being segmented injection proppant in second horizontal branch well 121, such that it is able to reach reduce this
The purpose of the frictional resistance of two intersection parts 5.
In addition, to ensure between second crack 3 that each first crack 2 is longitudinally set in compartment with it respectively not
Generation is communicated with each other, and in nearly well section, need to cause that each first crack 2 and the fracture length in each second crack 3 are got over
Come smaller.
As shown in fig. 7, in a preferred embodiment, first angle theta1With the second angle theta2Size model
Enclose and be more than 0 degree and less than or equal to 45 degree.So, difficulty of construction being not only reduced, meanwhile, can also protect
Card longitudinal direction is between the horizontal branch well 121 of first level Multilateral Wells 111 and second of compartment setting and longitudinal direction
Will not be communicated with each other between the first crack 2 set in compartment and the second crack 3, so as to increase mesh
The transformation volume on stratum 1 is marked, oil pump capacity is improve.
If above-mentioned first angle theta1With the second angle theta2Size be all higher than 45 degree, then can exist longitudinal direction in interval
The second folder that the first crack 2 and the second crack 3 that formula is set are formed between the projection on first level face 11
Angle θ2And longitudinal direction in compartment set the horizontal branch of first level Multilateral Wells 111 and second by 121 first
The first angle theta formed between projection on horizontal plane 111It is excessive.So, will reduce positioned at first level
The quantity in the crack 2 of first level Multilateral Wells 111 and first in face 11, and can also reduce positioned at the second water
The quantity of the second horizontal branch well 121 and the second crack 3 in plane 12.Further, transformation is reduced
The transformation volume of formation at target locations 1, so as to reduce oil pump capacity.
If above-mentioned first angle theta1With the second angle theta2Size be equal to zero degree, then will necessarily cause in compartment
What between the horizontal branch well 121 of first level Multilateral Wells 111 and second of setting and longitudinal direction was set in compartment
The phenomenon communicated with each other between first crack 2 and the second crack 3.
Therefore, first angle theta1With the second angle theta2Magnitude range be more than 0 degree and less than or equal to 45
Degree.Preferably, first angle theta1With the second angle theta2Big I for 10 degree, 15 degree, 20 degree, 25
Degree, 30 degree and 45 degree.
In a preferred embodiment, each first level Multilateral Wells 111 are placed equidistant in first level face 11
Interior, each second horizontal branch well 121 is placed equidistant in the second horizontal plane 12.So, not only facilitate to mesh
Mark stratum 1 carries out fracturing reform, meanwhile, also greatly increase oil pump capacity, it is to avoid due to positioned at first level
Each second level point between each first level Multilateral Wells 111 in face 11 and in the second horizontal plane 12
It is not spaced set between branch well 121, causes adjacent first level Multilateral Wells 111 and the second adjacent water
Linked up each other between flat Multilateral Wells 121, so that the drawbacks of reducing oil pump capacity.
In sum, the method for the construction building well has that oil pump capacity is more, oil yield efficiency is high and increases target ground
The advantage of the transformation volume of layer 1.
In addition, the present processes have increase each first crack 111 in first level face 11 with
And the advantage of the expanded range in each second crack 121 in the second horizontal plane 12, so that target ground
The oil production potential of layer 1 has obtained sufficient exploitation.
The present processes also have fracture pattern complicated, i.e. in first level face 11 and be this
One horizontal plane 11 is in the vertical to be configured with the He of the first crack 2 respectively in the second horizontal plane 12 of compartment setting
Second crack 3, so that the rate of regression of yield can be controlled effectively after pressure.
Although by reference to preferred embodiment, invention has been described, is not departing from the scope of the present invention
In the case of, various improvement can be carried out to it and part therein can be replaced with equivalent.Especially, only
Otherwise there is structural hazard, the every technical characteristic being previously mentioned in each embodiment can have been combined in any way
Come.The invention is not limited in specific embodiment disclosed herein, but including falling within the scope of the appended claims
All technical schemes.
Claims (10)
1. the method for a kind of construction building well, including：
First level face is built in formation at target locations；
Multiple first level Multilateral Wells spaced apart are circumferentially set in the first level face；
The second water set in compartment in the vertical with the first level face is built in the formation at target locations
Plane；
Multiple second horizontal branch wells spaced apart are circumferentially set in second horizontal plane, and cause each institute
State the second horizontal branch well in the first level face projection respectively with the adjacent first level branch
The first angle is formed between well.
2. method according to claim 1, it is characterised in that the formation at target locations be low permeability reservoir or
Thief zone reservoir.
3. method according to claim 2, it is characterised in that the formation at target locations is low permeability reservoir,
Methods described also includes to each first level Multilateral Wells carrying out staged fracturing respectively, with each described the
Multiple first cracks spaced apart are constructed on one horizontal branch well.
4. method according to claim 3, it is characterised in that the formation at target locations is low permeability reservoir,
Methods described also includes carrying out staged fracturing to each second horizontal branch well respectively, with each second water
Multiple second cracks spaced apart are constructed in flat Multilateral Wells.
5. method according to claim 4, it is characterised in that construction it is multiple be spaced apart described second
During crack, make projection of each described second crack of construction in the first level face respectively with it is adjacent
First crack between form the second angle.
6. method according to claim 4, it is characterised in that methods described also includes respectively to each described
Injection proppant in first level Multilateral Wells, with by causing that the proppant flow is reduced through the first intersection part
The frictional resistance of first intersection part, wherein, by each first crack respectively with the first level Multilateral Wells
The position for crossing is defined as first intersection part.
7. method according to claim 1, it is characterised in that methods described also includes respectively to each described
First level Multilateral Wells and each second horizontal branch well are cemented the well.
8. method according to claim 4, it is characterised in that methods described is also included respectively to described the
The injection proppant in two horizontal branch wells, with by causing that the proppant flow drops through the second intersection part
The frictional resistance of low second intersection part, wherein, by each second crack respectively with second horizontal branch
The position that well crosses is defined as second intersection part.
9. method according to claim 5, it is characterised in that first angle and second angle
Magnitude range be more than 0 degree and less than or equal to 45 degree.
10. method according to any one of claim 1 to 9, it is characterised in that each first water
Flat Multilateral Wells are placed equidistant in the first level face, and each second horizontal branch well is placed equidistant described
In second horizontal plane.
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| CN201510968226.5A CN106907136B (en) | 2015-12-22 | 2015-12-22 | A method of construction building well |
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| CN201510968226.5A CN106907136B (en) | 2015-12-22 | 2015-12-22 | A method of construction building well |
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|---|---|---|---|---|
| US5085275A (en) * | 1990-04-23 | 1992-02-04 | S-Cal Research Corporation | Process for conserving steam quality in deep steam injection wells |
| CN103628848A (en) * | 2013-12-02 | 2014-03-12 | 中国地质大学（武汉） | Multidirectional interlayer water flooding displacement oil extraction method and system |
| CN103924958A (en) * | 2013-05-31 | 2014-07-16 | 华北石油管理局 | Coal bed gas multi-branch horizontal well applicable to syncline structures |
| CN104329023A (en) * | 2014-09-23 | 2015-02-04 | 中国石油集团渤海钻探工程有限公司 | Boring method of coal bed gas cluster well |
| CN104481495A (en) * | 2014-11-05 | 2015-04-01 | 辽宁石油化工大学 | Coalbed methane (CBM) cluster double multi-branch horizontal well and drilling method relative to discharging and mining vertical well system |
-
2015
- 2015-12-22 CN CN201510968226.5A patent/CN106907136B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5085275A (en) * | 1990-04-23 | 1992-02-04 | S-Cal Research Corporation | Process for conserving steam quality in deep steam injection wells |
| CN103924958A (en) * | 2013-05-31 | 2014-07-16 | 华北石油管理局 | Coal bed gas multi-branch horizontal well applicable to syncline structures |
| CN103628848A (en) * | 2013-12-02 | 2014-03-12 | 中国地质大学（武汉） | Multidirectional interlayer water flooding displacement oil extraction method and system |
| CN104329023A (en) * | 2014-09-23 | 2015-02-04 | 中国石油集团渤海钻探工程有限公司 | Boring method of coal bed gas cluster well |
| CN104481495A (en) * | 2014-11-05 | 2015-04-01 | 辽宁石油化工大学 | Coalbed methane (CBM) cluster double multi-branch horizontal well and drilling method relative to discharging and mining vertical well system |
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