CN104879104A - Oil reservoir water injection method - Google Patents
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- CN104879104A CN104879104A CN201510276011.7A CN201510276011A CN104879104A CN 104879104 A CN104879104 A CN 104879104A CN 201510276011 A CN201510276011 A CN 201510276011A CN 104879104 A CN104879104 A CN 104879104A
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- 238000002347 injection Methods 0.000 title claims abstract description 136
- 239000007924 injection Substances 0.000 title claims abstract description 136
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 131
- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000004069 differentiation Effects 0.000 claims abstract description 71
- 230000005484 gravity Effects 0.000 claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 230000001419 dependent effect Effects 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 241000209094 Oryza Species 0.000 claims description 16
- 235000007164 Oryza sativa Nutrition 0.000 claims description 16
- 235000009566 rice Nutrition 0.000 claims description 16
- 230000035699 permeability Effects 0.000 claims description 8
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000011084 recovery Methods 0.000 description 6
- 239000002356 single layer Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
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Abstract
The invention provides an oil reservoir water injection method, which relates to the technical field of oil reservoir water injection development and comprises the following steps: taking the injection allocation amount of the central water injection well as a dependent variable and the liquid production amount of each production well as an independent variable, establishing a multiple regression model, performing multiple regression calculation, and determining the single-well injection allocation amount of the water injection well; determining a gravity differentiation influence coefficient and a water-oil mobility ratio of an oil reservoir according to geological data and oil reservoir data; determining a gravity differentiation degree value corresponding to the gravity differentiation influence coefficient and the water-oil mobility ratio of the oil reservoir on a preset gravity differentiation chart according to the gravity differentiation influence coefficient and the water-oil mobility ratio of the oil reservoir; determining theoretical minimum perforation thickness according to the water absorption index of a single well of the water injection well, the maximum bottom pressure of the water injection well, the formation pressure and the single well injection allocation amount; and determining the perforation thickness according to the reservoir thickness of the oil reservoir, the theoretical minimum perforation thickness and the gravity differential degree value, and injecting water into the water injection well.
Description
Technical field
The present invention relates to reservoir waterflooding technical field, particularly relate to a kind of reservoir water method.
Background technology
At present, reservoir water is a kind of mode conventional in oilfield exploitation procedure, can stablize reservoir pressure by water filling, improves oil recovery.Generally, large-scale oil reservoir adopts a set of well pattern to develop, and in well pattern, water injection well and producing well are arranged according to certain rule, and carry out injection allocation with certain method to water injection well.And at present because the available water source in many oil fields is limited, how obtaining high recovery ratio as far as possible by existing water source is one of difficult point in waterflooding extraction process, and reasonably allocation method determines that one of water flooding effect is large crucial at present.
The distribution that current prior art normally solves plane water injection rate to the research that water injection rate injection allocation is carried out or the computational methods of to split point for the water injection rate of stratified reservoir.Along with waterflooding extraction proceeds to certain period, to a certain degree declining all appears in oil production and reservoir pressure, at this moment will carry out Water injection rate to keep reservoir pressure and to improve recovery ratio to water injection well in oil fields.But, the research of longitudinally upper water injection rate distribution is not also carried out at present for the oil reservoir that thickness in monolayer is larger.It is a problem urgently to be resolved hurrily at present that the water injection rate how carried out longitudinally for the oil reservoir that thickness in monolayer is larger distributes.
Summary of the invention
The embodiment of the present invention provides a kind of reservoir water method, to solve in prior art the problem being difficult to carry out the water injection rate distribution longitudinally for the oil reservoir that thickness in monolayer is larger.
In order to achieve the above object, the present invention adopts following technical scheme:
A kind of reservoir water method, comprising:
Obtain the Liquid output of oil field target well group water injection well injection allocation amount and each producing well, and with described central water flooding well injection allocation amount for dependent variable, the Liquid output of each producing well is independent variable, sets up multivariate regression models;
Carry out multivariate linear equation according to described multivariate regression models, determine the individual well injection allocation amount of water injection well;
By the water-oil mobility ratio of geologic information and oil reservoir data determination gravitational differentiation influence coefficient and oil reservoir;
According to the water-oil mobility ratio of described gravitational differentiation influence coefficient and described oil reservoir, a gravitational differentiation plate pre-set is determined the gravitational differentiation degree value corresponding to water-oil mobility ratio of this gravitational differentiation influence coefficient and oil reservoir;
Obtain the individual well rice injectivity index of water injection well, the maximum bottom pressure of water injection well and strata pressure;
Theoretical minimum perforation thickness is determined according to the individual well rice injectivity index of described water injection well, the maximum bottom pressure of water injection well, strata pressure and individual well injection allocation amount;
Obtain oil reservoir thickness, and according to described oil reservoir thickness, theoretical minimum perforation thickness and gravitational differentiation degree value determination perforation thickness;
Water filling is carried out to described water injection well according to described perforation thickness.
Concrete, the Liquid output of described acquisition oil field target well group water injection well injection allocation amount and each producing well, and with described central water flooding well injection allocation amount for dependent variable, the Liquid output of each producing well is independent variable, sets up multivariate regression models, comprising:
Set up the first multivariate regression models:
Q
iw＝b
0+Q
l1b
1+Q
l2b
2+...+Q
lkb
k+...+Q
lmb
m
Wherein, b
0, b
1..., b
mfor regression coefficient; Q
iwfor the individual well injection allocation amount of water injection well; Q
l1, Q
l2..., Q
lmfor the Liquid output of each producing well be communicated with water injection well;
According to described first multivariate regression models, calculate partial correlation coefficient r
j:
Wherein:
q
jfor the sum of square of deviations of jth mouth well; Q ' is minimum deflection quadratic sum; K=1,2 ... m; M is producing well sum; I=1,2 ... n; N is the group number of historical production data;
To described partial correlation coefficient r
jbe normalized, obtain incidence coefficient γ
k, and build the second multivariate regression models;
Wherein:
described second multivariate regression models is:
Q
iw＝Q
l1γ
1+Q
l2γ
2+...+Q
lkγ
k+...+Q
lmγ
m。
Concrete, describedly carry out multivariate linear equation according to described multivariate regression models, determine the individual well injection allocation amount of water injection well, comprising:
Carry out multivariate linear equation according to described second multivariate regression models, determine the individual well injection allocation amount of water injection well.
Concrete, described by geologic information and oil reservoir data determination gravitational differentiation influence coefficient, comprising:
Oil reservoir horizontal permeability k is obtained by described geologic information
h, vertical permeability k
vand average seepage section amasss
Profit density contrast Δ ρ is obtained, viscosity of crude μ by described oil reservoir data
oand waterflood injection rate q;
Determine gravitational differentiation influence coefficient G:
Concrete, described in the gravitational differentiation plate that pre-sets comprise the water-oil mobility ratio curve of a coordinate system and many oil reservoirs, the value of the corresponding water-oil mobility ratio of water-oil mobility ratio curve of every bar oil reservoir; The abscissa of described coordinate system is gravity influence of different distribution coefficient, and ordinate is gravity differential degree value;
The described water-oil mobility ratio according to described gravitational differentiation influence coefficient and described oil reservoir, a gravitational differentiation plate pre-set is determined the gravitational differentiation degree value corresponding to water-oil mobility ratio of this gravitational differentiation influence coefficient and oil reservoir, comprising:
According to the water-oil mobility ratio of described oil reservoir, the gravitational differentiation plate pre-set is determined the water-oil mobility ratio curve of the oil reservoir that the water-oil mobility ratio of this oil reservoir is corresponding;
Described abscissa is determined described gravitational differentiation influence coefficient, and the impact point on the corresponding water-oil mobility ratio curve obtaining this oil reservoir, determine the abscissa value of described impact point, using this abscissa value as described gravitational differentiation degree value.
Concrete, the described individual well rice injectivity index according to described water injection well, the maximum bottom pressure of water injection well, strata pressure and individual well injection allocation amount determine theoretical minimum perforation thickness, comprising:
According to formula:
determine theoretical minimum perforation thickness h
min; Wherein, Ii is described individual well rice injectivity index; p
fmaxfor the maximum bottom pressure of described water injection well; p
rfor described strata pressure.
Concrete, described according to described oil reservoir thickness, theoretical minimum perforation thickness and gravitational differentiation degree value determination perforation thickness, comprising:
According to formula:
h＝H-(H-h
min)E
Determine described perforation thickness h; Wherein, H is described oil reservoir thickness; E is described gravitational differentiation degree value.
A kind of reservoir water method that the embodiment of the present invention provides, by setting up multivariate regression models, determines the individual well injection allocation amount of water injection well; By the water-oil mobility ratio of geologic information and oil reservoir data determination gravitational differentiation influence coefficient and oil reservoir, and determine the gravitational differentiation degree value corresponding to water-oil mobility ratio of this gravitational differentiation influence coefficient and oil reservoir; Theoretical minimum perforation thickness is determined afterwards according to the individual well rice injectivity index of water injection well, the maximum bottom pressure of water injection well, strata pressure and individual well injection allocation amount; Thus determine required perforation thickness according to oil reservoir thickness, theoretical minimum perforation thickness and gravitational differentiation degree value; Water filling can be carried out to this water injection well like this according to this perforation thickness.Visible, the invention solves in prior art the problem being difficult to carry out the water injection rate distribution longitudinally for the oil reservoir that thickness in monolayer is larger, Water injection rate has been carried out to water injection well in oil fields, thus can reservoir pressure have been kept, and then improved recovery ratio.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The flow chart one of the reservoir water method that Fig. 1 provides for the embodiment of the present invention;
The flowchart 2 of the reservoir water method that Fig. 2 provides for the embodiment of the present invention;
Fig. 3 is the gravitational differentiation plate schematic diagram in the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, a kind of reservoir water method that the embodiment of the present invention provides, comprising:
The Liquid output of step 101, acquisition oil field target well group water injection well injection allocation amount and each producing well, and with central water flooding well injection allocation amount for dependent variable, the Liquid output of each producing well is independent variable, sets up multivariate regression models.
Step 102, carry out multivariate linear equation according to multivariate regression models, determine the individual well injection allocation amount of water injection well.
Step 103, water-oil mobility ratio by geologic information and oil reservoir data determination gravitational differentiation influence coefficient and oil reservoir.
Step 104, water-oil mobility ratio according to this gravitational differentiation influence coefficient and oil reservoir, a gravitational differentiation plate pre-set is determined the gravitational differentiation degree value corresponding to water-oil mobility ratio of this gravitational differentiation influence coefficient and oil reservoir.
Step 105, the individual well rice injectivity index obtaining water injection well, the maximum bottom pressure of water injection well and strata pressure.
Step 106, individual well rice injectivity index, the maximum bottom pressure of water injection well, strata pressure and individual well injection allocation amount according to water injection well determine theoretical minimum perforation thickness.
Step 107, acquisition oil reservoir thickness, and according to oil reservoir thickness, theoretical minimum perforation thickness and gravitational differentiation degree value determination perforation thickness.
Step 108, carry out water filling according to perforation thickness to water injection well.
A kind of reservoir water method that the embodiment of the present invention provides, by setting up multivariate regression models, determines the individual well injection allocation amount of water injection well; By the water-oil mobility ratio of geologic information and oil reservoir data determination gravitational differentiation influence coefficient and oil reservoir, and determine the gravitational differentiation degree value corresponding to water-oil mobility ratio of this gravitational differentiation influence coefficient and oil reservoir; Theoretical minimum perforation thickness is determined afterwards according to the individual well rice injectivity index of water injection well, the maximum bottom pressure of water injection well, strata pressure and individual well injection allocation amount; Thus determine required perforation thickness according to oil reservoir thickness, theoretical minimum perforation thickness and gravitational differentiation degree value; Water filling can be carried out to this water injection well like this according to this perforation thickness.Visible, the invention solves in prior art the problem being difficult to carry out the water injection rate distribution longitudinally for the oil reservoir that thickness in monolayer is larger, Water injection rate has been carried out to water injection well in oil fields, thus can reservoir pressure have been kept, and then improved recovery ratio.
Better understand the present invention for the ease of those skilled in the art, enumerate a more specifically embodiment below, as shown in Figure 2, a kind of reservoir water method that the embodiment of the present invention provides, comprising:
The Liquid output of step 201, acquisition oil field target well group water injection well injection allocation amount and each producing well, and with central water flooding well injection allocation amount for dependent variable, the Liquid output of each producing well is independent variable, sets up the first multivariate regression models.
Wherein, this first multivariate regression models is:
Q
iw＝b
0+Q
l1b
1+Q
l2b
2+...+Q
lkb
k+...+Q
lmb
m
Wherein, b
0, b
1..., b
mfor regression coefficient; Q
iwfor the individual well injection allocation amount of water injection well; Q
l1, Q
l2..., Q
lmfor the Liquid output of each producing well be communicated with water injection well; M is the quantity of this producing well.
Step 202, according to this first multivariate regression models, calculate partial correlation coefficient.
This partial correlation coefficient is r
j:
Wherein:
q
jfor the sum of square of deviations of jth mouth well; Q ' is minimum deflection quadratic sum; K=1,2 ... m; M is producing well sum; I=1,2 ... n; N is the group number of historical production data.
Step 203, partial correlation coefficient to be normalized, to obtain incidence coefficient, and build the second multivariate regression models.
Wherein, this incidence coefficient is γ
k:
This second multivariate regression models is:
Q
iw＝Q
l1γ
1+Q
l2γ
2+...+Q
lkγ
k+...+Q
lmγ
m。
Step 204, carry out multivariate linear equation according to the second multivariate regression models, determine the individual well injection allocation amount of water injection well.
What deserves to be explained is, now the individual well injection allocation amount Q of water injection well
iwunit be m
3/ mon.
Step 205, obtain oil reservoir horizontal permeability, vertical permeability and average seepage section by geologic information and amass.
Herein, oil reservoir horizontal permeability is k
h, unit is md, vertical permeability is k
v, unit is md, this average seepage section amasss and is
Step 206, obtain profit density contrast by oil reservoir data, the water-oil mobility ratio of viscosity of crude, waterflood injection rate and oil reservoir.
Herein, profit density contrast is Δ ρ, and unit is g/cm
3, viscosity of crude is μ
o, unit is mPas, waterflood injection rate is q, and unit is m
3/ d; The water-oil mobility ratio of oil reservoir is M.
Step 207, determine gravitational differentiation influence coefficient.
Herein, gravitational differentiation influence coefficient is:
Step 208, water-oil mobility ratio according to oil reservoir, the gravitational differentiation plate pre-set is determined the water-oil mobility ratio curve of the oil reservoir that the water-oil mobility ratio of this oil reservoir is corresponding; Determine gravitational differentiation influence coefficient on the horizontal scale, and the impact point on the corresponding water-oil mobility ratio curve obtaining this oil reservoir, determine the abscissa value of impact point, using this abscissa value as gravitational differentiation degree value.
What deserves to be explained is, as shown in Figure 3, the gravitational differentiation plate that this pre-sets comprises the water-oil mobility ratio curve of a coordinate system and many oil reservoirs, the value of the corresponding water-oil mobility ratio of water-oil mobility ratio curve of every bar oil reservoir, as the M in Fig. 3 is respectively 20,10,5,2,1,0.2, then the water-oil mobility ratio curve of corresponding 6 oil reservoirs; The abscissa of described coordinate system is gravity influence of different distribution coefficient G, and ordinate is gravity differential degree value E.
Generally, the expression formula of this gravitational differentiation degree value E is:
Wherein, V
e (no-gravity)for volumetric sweep efficiency during water breakthrough during agravic impact, volumetric sweep efficiency during water breakthrough namely during G=0; V
e (gravity)volumetric sweep efficiency during water breakthrough during for there being a gravity effect.
By this gravitational differentiation degree value E, can know the influence power of gravity in oil reservoir, the excursion of gravitational differentiation degree value E is that 0 to 1, E value is higher, shows that Action of Gravity Field is more remarkable.The situation of E=1 is there will not be in the oil reservoir situation of reality; And as E=0, represent that gravity is without impact, can adopt conventional commingled water injection; As 0<E<1, according to gravity effect size, the bottom perforating degree of water injection well can be reduced.
Step 209, obtain the individual well rice injectivity index of water injection well, the maximum bottom pressure of water injection well and strata pressure, and determine theoretical minimum perforation thickness according to the individual well rice injectivity index of water injection well, the maximum bottom pressure of water injection well, strata pressure and individual well injection allocation amount.
According to formula:
determine theoretical minimum perforation thickness h
min; Wherein, Ii is individual well rice injectivity index, and unit is m
3/ dMpam; p
fmaxfor the maximum bottom pressure of water injection well; p
rfor strata pressure.
Minimum perforation thickness need be met when follow-up perforation, to prevent when preferred perforation thickness, the too small requirement that simultaneously can not meet water injection pressure and waterflood injection rate of thickness.Perforating site top can be defaulted as oil reservoir top.
Step 210, acquisition oil reservoir thickness, and according to oil reservoir thickness, theoretical minimum perforation thickness and gravitational differentiation degree value determination perforation thickness, and carry out water filling according to perforation thickness to water injection well.
This oil reservoir thickness can obtain from geologic information.
Herein, can according to formula: h=H-(H-h
min) E, determine perforation thickness h; Wherein, H is oil reservoir thickness, and E is described gravitational differentiation degree value.
A kind of reservoir water method that the embodiment of the present invention provides, by setting up multivariate regression models, determines the individual well injection allocation amount of water injection well; By the water-oil mobility ratio of geologic information and oil reservoir data determination gravitational differentiation influence coefficient and oil reservoir, and determine the gravitational differentiation degree value corresponding to water-oil mobility ratio of this gravitational differentiation influence coefficient and oil reservoir; Theoretical minimum perforation thickness is determined afterwards according to the individual well rice injectivity index of water injection well, the maximum bottom pressure of water injection well, strata pressure and individual well injection allocation amount; Thus determine required perforation thickness according to oil reservoir thickness, theoretical minimum perforation thickness and gravitational differentiation degree value; Water filling can be carried out to this water injection well like this according to this perforation thickness.Visible, the invention solves in prior art the problem being difficult to carry out the water injection rate distribution longitudinally for the oil reservoir that thickness in monolayer is larger, Water injection rate has been carried out to water injection well in oil fields, thus can reservoir pressure have been kept, and then improved recovery ratio.
Apply specific embodiment in the present invention to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (7)
1. a reservoir water method, is characterized in that, comprising:
Obtain the Liquid output of oil field target well group water injection well injection allocation amount and each producing well, and with described central water flooding well injection allocation amount for dependent variable, the Liquid output of each producing well is independent variable, sets up multivariate regression models;
Carry out multivariate linear equation according to described multivariate regression models, determine the individual well injection allocation amount of water injection well;
By the water-oil mobility ratio of geologic information and oil reservoir data determination gravitational differentiation influence coefficient and oil reservoir;
According to the water-oil mobility ratio of described gravitational differentiation influence coefficient and described oil reservoir, a gravitational differentiation plate pre-set is determined the gravitational differentiation degree value corresponding to water-oil mobility ratio of this gravitational differentiation influence coefficient and oil reservoir;
Obtain the individual well rice injectivity index of water injection well, the maximum bottom pressure of water injection well and strata pressure;
Theoretical minimum perforation thickness is determined according to the individual well rice injectivity index of described water injection well, the maximum bottom pressure of water injection well, strata pressure and individual well injection allocation amount;
Obtain oil reservoir thickness, and according to described oil reservoir thickness, theoretical minimum perforation thickness and gravitational differentiation degree value determination perforation thickness;
Water filling is carried out to described water injection well according to described perforation thickness.
2. reservoir water method according to claim 1, is characterized in that, the Liquid output of described acquisition oil field target well group water injection well injection allocation amount and each producing well, and with described central water flooding well injection allocation amount for dependent variable, the Liquid output of each producing well is independent variable, sets up multivariate regression models, comprising:
Set up the first multivariate regression models:
Q
iw＝b
0+Q
l1b
1+Q
l2b
2+...+Q
lkb
k+...+Q
lmb
m
Wherein, b
0, b
1..., b
mfor regression coefficient; Q
iwfor the individual well injection allocation amount of water injection well; Q
l1, Q
l2..., Q
lmfor the Liquid output of each producing well be communicated with water injection well;
According to described first multivariate regression models, calculate partial correlation coefficient r
j:
Wherein:
q
jfor the sum of square of deviations of jth mouth well; Q ' is minimum deflection quadratic sum; K=1,2 ... m; M is producing well sum; I=1,2 ... n; N is the group number of historical production data;
To described partial correlation coefficient r
jbe normalized, obtain incidence coefficient γ
k, and build the second multivariate regression models;
Wherein:
j=1,2...m; Described second multivariate regression models is:
Q
iw＝Q
l1γ
1+Q
l2γ
2+...+Q
lkγ
k+...+Q
lmγ
m。
3. reservoir water method according to claim 2, is characterized in that, describedly carries out multivariate linear equation according to described multivariate regression models, determines the individual well injection allocation amount of water injection well, comprising:
Carry out multivariate linear equation according to described second multivariate regression models, determine the individual well injection allocation amount of water injection well.
4. reservoir water method according to claim 3, is characterized in that, described by geologic information and oil reservoir data determination gravitational differentiation influence coefficient, comprising:
Oil reservoir horizontal permeability k is obtained by described geologic information
h, vertical permeability k
vand average seepage section amasss
Profit density contrast Δ ρ is obtained, viscosity of crude μ by described oil reservoir data
oand waterflood injection rate q;
Determine gravitational differentiation influence coefficient G:
5. reservoir water method according to claim 4, is characterized in that, described in the gravitational differentiation plate that pre-sets comprise the water-oil mobility ratio curve of a coordinate system and many oil reservoirs, the value of the corresponding water-oil mobility ratio of water-oil mobility ratio curve of every bar oil reservoir; The abscissa of described coordinate system is gravity influence of different distribution coefficient, and ordinate is gravity differential degree value;
The described water-oil mobility ratio according to described gravitational differentiation influence coefficient and described oil reservoir, a gravitational differentiation plate pre-set is determined the gravitational differentiation degree value corresponding to water-oil mobility ratio of this gravitational differentiation influence coefficient and oil reservoir, comprising:
According to the water-oil mobility ratio of described oil reservoir, the gravitational differentiation plate pre-set is determined the water-oil mobility ratio curve of the oil reservoir that the water-oil mobility ratio of this oil reservoir is corresponding;
Described abscissa is determined described gravitational differentiation influence coefficient, and the impact point on the corresponding water-oil mobility ratio curve obtaining this oil reservoir, determine the abscissa value of described impact point, using this abscissa value as described gravitational differentiation degree value.
6. reservoir water method according to claim 5, is characterized in that, the described individual well rice injectivity index according to described water injection well, the maximum bottom pressure of water injection well, strata pressure and individual well injection allocation amount determine theoretical minimum perforation thickness, comprising:
According to formula:
determine theoretical minimum perforation thickness h
min; Wherein, Ii is described individual well rice injectivity index; p
fmaxfor the maximum bottom pressure of described water injection well; p
rfor described strata pressure.
7. reservoir water method according to claim 6, is characterized in that, described according to described oil reservoir thickness, theoretical minimum perforation thickness and gravitational differentiation degree value determination perforation thickness, comprising:
According to formula:
h＝H-(H-h
min)E
Determine described perforation thickness h; Wherein, H is described oil reservoir thickness; E is described gravitational differentiation degree value.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105888633A (en) * | 2016-06-20 | 2016-08-24 | 中国石油大学(华东) | Determination method for injection allocation volume of separated layer water injection layer sections |
| CN107339087A (en) * | 2017-08-10 | 2017-11-10 | 中国石油天然气股份有限公司 | Water injection splitting method and device |
| CN109630094A (en) * | 2018-07-23 | 2019-04-16 | 中国石油大学(北京) | A kind of unconventional pressure release velocity analysis method, device, system and equipment can be stored |
| CN110469300A (en) * | 2019-09-03 | 2019-11-19 | 西南石油大学 | A kind of fractured-cavernous carbonate reservoir waterflood recovery efficiency factor calculation method |
| CN110965970A (en) * | 2018-09-29 | 2020-04-07 | 北京国双科技有限公司 | Method and device for determining correlation between water injection well and oil production well |
| CN113011772A (en) * | 2021-04-02 | 2021-06-22 | 中国石油天然气股份有限公司 | Calculation method of gas drive reservoir recovery ratio, data processing device, computer equipment and readable storage medium |
| CN113738319A (en) * | 2021-09-07 | 2021-12-03 | 中国石油大学(北京) | Water drive invalid cycle identification method, device and medium based on Lorentz curve |
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