CN106837273A - The double solution cavity Reservoir Body water injection indication curve interpretation models of Carbonate Reservoir - Google Patents

The double solution cavity Reservoir Body water injection indication curve interpretation models of Carbonate Reservoir Download PDF

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Publication number
CN106837273A
CN106837273A CN201710019917.XA CN201710019917A CN106837273A CN 106837273 A CN106837273 A CN 106837273A CN 201710019917 A CN201710019917 A CN 201710019917A CN 106837273 A CN106837273 A CN 106837273A
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water
solution cavity
reservoir
oil
volume
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乐平
刘东晨
杜志敏
陈小凡
郭忠良
唐潮
陈文刚
丰妍
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Southwest Petroleum University
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Southwest Petroleum University
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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
    • E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
    • E21B43/20—Displacing by water
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/06—Measuring temperature or pressure

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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)
  • Geophysics (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)

Abstract

The present invention provides a kind of Carbonate Reservoir double solution cavity Reservoir Body water injection indication curve interpretation models, i.e., when oil reservoir injects certain water NWWhen, pressure is with the function model of cumulative water injected：The model can calculate water filling for the mutual profit supply exchange situation of two sets of solution cavity Reservoir Bodies during oil.Improved new model primary condition more meets the truth of many Reservoir Bodies of Carbonate Reservoir discrete type, water filling is actually closer with mining site for injection water retaining in reservoir change during oil, can tentatively judge Reservoir Body type using theoretical model, more accurately determine two sets of volumes of solution cavity Reservoir Body volume, crude oil and stratum water, and analyze many round water fillings for profit exchange situation between two sets of solution cavity Reservoir Bodies during oil.

Description

The double solution cavity Reservoir Body water injection indication curve interpretation models of Carbonate Reservoir
Technical field
The present invention relates to reservoir geology and development technique field, more particularly to a kind of double solution cavity Reservoir Bodies of Carbonate Reservoir Water injection indication curve interpretation model.
Background technology
Water injection indication curve theoretical research traditional at present focuses mostly on linearly elevated with accumulative injection rate in injection pressure Linear pattern indicative curve model, and scene in practice water injection indication curve often occur curve turnover after slope reduction situation, Such situation represents the well floood conformance and employs to two sets or cover more Reservoir Body, it is necessary to the intension meaning represented to the indicative curve Justice is furtherd investigate.
The content of the invention
It is an object of the invention to solve the defect that above-mentioned prior art is present, there is provided a kind of double solution cavities of Carbonate Reservoir Reservoir Body water injection indication curve interpretation model.
The double solution cavity Reservoir Body water injection indication curve interpretation models of a kind of Carbonate Reservoir, when oil reservoir injects certain water NW When, pressure is with the function model of cumulative water injected：
Wherein,
N1It is the crude oil volume of solution cavity 1, m3；
N2It is the crude oil volume of solution cavity 2, m3；
NW0Accumulative water injection rate during second set of Reservoir Body, m are fed through to for injection water during oil for water filling3；
BwIt is the volume factor of water, decimal；
BoiIt is the volume factor of crude oil under reset pressure, decimal；
R1It is the water oil volume ratio of solution cavity 1, decimal；
CoIt is the compressed coefficient of crude oil, MPa-1；
p0It is that strata pressure before oil, MPa are replaced in water filling；
CwIt is the compressed coefficient of stratum water, MPa-1。
By the change of many rounds (more than 3 rounds) water injection indication curve slope, and each water filling that creation data is counted Oil production, aquifer yield data between round, can solve above-mentioned equation and calculate：The volume N of solution cavity Reservoir Body 1,21、N2With water oil Volume ratio R1And R2。
Further, the double solution cavity Reservoir Body water injection indication curve interpretation models of Carbonate Reservoir as described above, when not When considering the elastic energy of solution cavity reclaimed water, that is, the volume factor perseverance for thinking water is 1, then the function model of pressure and cumulative water injected It is reduced to：
The application successively employs two sets of solution cavities and preserves with double solution cavity reservoir models as goal in research, in research the injecting process Body is to water injection indication curve morphology influence.New model can be used to calculate two sets of solution cavity Reservoir Bodies ratio each shared by volume, So as to calculate each self-corresponding volume, new model is contemplated that influence of the water phase elastic energy to water injection indication curve form in addition, Therefore it is applied below to the calculating of Reservoir Body profit volume in the case of two kinds：1. initial situation is pure oil in two sets of solution cavity Reservoir Bodies Or oil-water coexistence, wherein oil-water coexistence include any of which solution cavity Reservoir Body or the two all for oil-water coexistence situation；2. later stage Water filling is changed stepwise situation for injection water retaining in reservoir in any solution cavity Reservoir Body during oil.Therefore this model can calculate water filling and replace oily mistake The mutual profit supply exchange situation of two sets of solution cavity Reservoir Bodies in journey.Improved new model primary condition more meets Carbonate Oil The truth of many Reservoir Bodies of discrete type is hidden, water filling is actually closer with mining site for injection water retaining in reservoir change during oil, using theory Model can tentatively judge Reservoir Body type, more accurately determine two sets of volumes of solution cavity Reservoir Body volume, crude oil and stratum water, And many round water fillings are analyzed for profit exchange situation between two sets of solution cavity Reservoir Bodies during oil.
Brief description of the drawings
Water injection indication curve (second different solution cavity volume N of the double solution cavity Reservoir Bodies of Fig. 12)；
Water injection indication curve (first different solution cavity volume N of the double solution cavity Reservoir Bodies of Fig. 21)。
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below the present invention in technical scheme carry out clearly Chu, it is fully described by, it is clear that described embodiment is a part of embodiment of the invention, rather than whole embodiments.It is based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made Embodiment, belongs to the scope of protection of the invention.
For double solution cavity models, it is assumed that guide functions are only played in the crack between two solution cavities, solution cavity is main Reservoir Body, suddenly Omit the storage and collection performance in crack.Assuming that the initial volume of solution cavity 1 and 2 is respectively Vp1,Vp2.The Central Plains oil volume of solution cavity 1 is Voi1, stratum Water volume is Vwi1, the Central Plains oil volume of solution cavity 2 is Voi2, stratum water volume is Vwi2, and original water oil in each solution cavity is defined respectively Volume ratio is
R1=Vwi1/Voi1 (1)
R2=Vwi2/Voi2 (2)
Then：
Vp1=Voi1+Vwi1 (3)
Vp2=Voi2+Vwi2 (4)
Vp1It is the initial total measurement (volume) of solution cavity 1, m3；
Vp2It is the initial total measurement (volume) of solution cavity 2, m3；
Oil reservoir injects certain water (NW), work as NWLess than NW0Before, injection water only involves Reservoir Body 1, only when tired Product water injection rate is more than NW0, that is, after providing enough pressure differences, injection water just links up second set of Reservoir Body solution cavity 2.Based on above-mentioned it is assumed that When cumulative water injected is less than NW0The pressure of oil reservoir changes identical with single solution cavity model with cumulative water injected before, i.e.,：
NW0Accumulative water injection rate during second set of Reservoir Body, m are fed through to for injection water during oil for water filling3；
BwIt is the volume factor of water, decimal；
BoiIt is the volume factor of crude oil under reset pressure, decimal；
R1It is the water oil volume ratio of solution cavity 1, decimal；
CwIt is the compressed coefficient of stratum water, MPa-1；
p0It is that strata pressure before oil, MPa are replaced in water filling；
CoIt is the compressed coefficient of crude oil, MPa-1；
N1It is the crude oil volume of solution cavity 1, m3；
When injection water volume is more than NW0When：Pressure difference exceedes the minimum differntial pressure that crack is linked up with second set of reservoir system solution cavity When, it is assumed that solution cavity 1,2 is linked up the moment, pressure redistribution, and pressure balance is reached in the short time.
NW0Accumulative water injection rate during second set of Reservoir Body, m are fed through to for injection water during oil for water filling3；
R2It is the water oil volume ratio of solution cavity 2, decimal；
N2It is the crude oil volume of solution cavity 2, m3；
By the change of many rounds (more than 3 rounds) water injection indication curve slope, and each water filling that creation data is counted Oil production, aquifer yield data between round, can solve above-mentioned equation and calculate：The volume N of solution cavity Reservoir Body 1,21、N2With water oil Volume ratio R1And R2。
Obviously link up second set solution cavity Reservoir Body, the functional relation of pressure and cumulative water injected, slope by It is changed intoSlope diminishes, and curve becomes gentle, that is, the pressure pattern of broken line occur.
For above formula (6), when the elastic energy of solution cavity reclaimed water is not considered, that is, the volume factor perseverance for thinking water is 1, then go up Formula can be further simplified as：
Therefore, water injection pressure expression-form can be reduced to following piecewise function：
Water injection indication curve morphological analysis
By taking two fracture hole models as an example, when equal with the volume of first solution cavity Reservoir Body that oil well is linked up, and second appearance Store up collective volume it is unequal when, its slope influence on indicative curve second segment is as shown in Figure 1：
When the initial condition of solution cavity 1 is identical, cumulative injection no more than the value at solution cavity flex point, indicative curve all same, When cumulative injection is more than Nw0, the oil reservoir volume of solution cavity 2 is bigger, then the elastic energy of Part II solution cavity is bigger, then second-order Section, injection water be easier injection, straight line slope reduction become apparent from.
When the volume that second volume Reservoir Body is linked up with oil well is equal, and the volume of first solution cavity Reservoir Body is unequal When, its influence schematic diagram to indicative curve form as shown in Fig. 2 the initial condition of given solution cavity 2 is identical, when each curve accumulation Injection rate causes the pressure of solution cavity to be no more than pLWhen, it is clear that the oil reservoir volume of solution cavity 1 is bigger, and elastic energy is bigger, the first stage Straight slope it is smaller, be increased to up to identical reservoir pressure, it is necessary to inject more water, therefore, NW01<NW02<NW03.When tired Product water filling exceedes corresponding cumulative injection at respective flex point pressure, and solution cavity 1 and 2 plays respective elastic energy simultaneously, therefore Slope diminishes, though it is assumed that the attribute of second solution cavity is identical, but the slope of second stage solution cavity receives the elastic energy of solution cavity 1 and 2 Collective effect influence, therefore still meet when the oil reservoir volume of solution cavity 1 is bigger, the slope of second stage exponential curve is got over It is small.
The application is applied below to the calculating of Reservoir Body profit volume in the case of two kinds：1. it is initial in two sets of solution cavity Reservoir Bodies Situation for it is pure oil or oil-water coexistence, wherein oil-water coexistence include any of which solution cavity Reservoir Body or the two all for oil-water coexistence feelings Condition；2. later stage water filling is changed stepwise situation for injection water retaining in reservoir in any solution cavity Reservoir Body during oil.Therefore this model can be calculated Water filling is for the mutual profit supply exchange situation of two sets of solution cavity Reservoir Bodies during oil.Improved new model primary condition more meets The truth of many Reservoir Bodies of Carbonate Reservoir discrete type, water filling actually more connects for injection water retaining in reservoir change during oil with mining site Closely, Reservoir Body type be can tentatively judge using theoretical model, two sets of solution cavity Reservoir Body volumes, crude oil and ground more accurately determined The volume of layer water, and many round water fillings are analyzed for profit exchange situation between two sets of solution cavity Reservoir Bodies during oil.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although The present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used Modified with to the technical scheme described in foregoing embodiments, or equivalent is carried out to which part technical characteristic； And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and Scope.

Claims (2)

1. double solution cavity Reservoir Body water injection indication curve interpretation models of a kind of Carbonate Reservoir, it is characterised in that when oil reservoir injection Certain water NWWhen, pressure is with the function model of cumulative water injected：
p = N w B w N 1 B o i ( R 1 C w + C o ) + p 0 , N w &le; N w 0 ( N w - N w 0 ) B w N 1 B o i ( R 1 C w + C o ) + N 2 B o i ( R 2 C w + C o ) + N w 0 B w N 1 B o i ( R 1 C w + C o ) + p 0 , N w > N w 0
Wherein,
N1It is the crude oil volume of solution cavity 1, m3；
N2It is the crude oil volume of solution cavity 2, m3；
NW0Accumulative water injection rate during second set of Reservoir Body, m are fed through to for injection water during oil for water filling3；
BwIt is the volume factor of water, decimal；
BoiIt is the volume factor of crude oil under reset pressure, decimal；
R1It is the water oil volume ratio of solution cavity 1, decimal；
CoIt is the compressed coefficient of crude oil, MPa-1；
p0It is that strata pressure before oil, MPa are replaced in water filling；
CwIt is the compressed coefficient of stratum water, MPa-1
By the oil-producing between the change of 3 round above water injection indication curve slopes, and each water filling round of creation data statistics Amount, aquifer yield data, can solve above-mentioned equation and calculate：The volume N of solution cavity Reservoir Body 1,21、N2Compare R with water oil volume1And R2。
2. the double solution cavity Reservoir Body water injection indication curve interpretation models of Carbonate Reservoir according to claim 1, its feature It is,
When the elastic energy of solution cavity reclaimed water is not considered, that is, the volume factor perseverance for thinking water is 1, then pressure and cumulative water injected Function model is reduced to：
p = N w N 1 B o i C o + p 0 , N w &le; N w 0 ( N w - N w 0 ) N 1 B o i C o + N 2 B o i C o + N w 0 N 1 B o i C o + p 0 , N w > N w 0 .
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CN108386170A (en) * 2018-02-01 2018-08-10 中国石油化工股份有限公司 Underground energy consumption characterizing method during a kind of oil reservoir development
CN108446511A (en) * 2018-03-28 2018-08-24 中国石油化工股份有限公司 The reserve forecasting method of fracture-pore reservoir oil, water
CN108756873A (en) * 2018-06-22 2018-11-06 中国海洋石油集团有限公司 A kind of determination method reducing fluid neuron network resistance based on nanotechnology
CN109424354A (en) * 2017-08-29 2019-03-05 中国石油化工股份有限公司 The calculation method and system of bottom water reservoir single well-controlled water oil volume ratio
CN109697538A (en) * 2017-10-22 2019-04-30 哈尔滨石油学院 Carbonate Reservoir Caves-constant volume physical efficiency amount indicative curve interpretation model
CN109944584A (en) * 2017-12-19 2019-06-28 中国石油天然气股份有限公司 The reserves acquisition methods and device of Reservoir Body in carbonate rock oil well
CN109978303A (en) * 2017-12-28 2019-07-05 中国石油天然气股份有限公司 The determination method, apparatus and storage medium of the exploitation measure of heavy crude reservoir
CN111191183A (en) * 2020-01-09 2020-05-22 中国石油大学(北京) Reservoir parameter calculation method, device and equipment
CN112196527A (en) * 2020-11-02 2021-01-08 西南石油大学 Method for determining water body size of fracture-cavity type oil reservoir
CN112761602A (en) * 2021-02-05 2021-05-07 西南石油大学 Far well reserve potential excavating method for fracture-cavity oil reservoir
CN112761582A (en) * 2021-02-05 2021-05-07 西南石油大学 Fracture-cavity type oil reservoir parameter calculation method
CN112814653A (en) * 2021-02-05 2021-05-18 西南石油大学 Fracture-cavity type oil reservoir structure judgment method
CN112901145A (en) * 2021-03-19 2021-06-04 大庆油田有限责任公司 Volume energy method for analyzing injection-production relation between oil-water wells
RU2789784C1 (en) * 2021-02-05 2023-02-09 Саусвест Петролеум Юниверсити Method for calculating the parameters of fractured-cavernous reservoirs

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CN109697538A (en) * 2017-10-22 2019-04-30 哈尔滨石油学院 Carbonate Reservoir Caves-constant volume physical efficiency amount indicative curve interpretation model
CN109944584A (en) * 2017-12-19 2019-06-28 中国石油天然气股份有限公司 The reserves acquisition methods and device of Reservoir Body in carbonate rock oil well
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CN109978303A (en) * 2017-12-28 2019-07-05 中国石油天然气股份有限公司 The determination method, apparatus and storage medium of the exploitation measure of heavy crude reservoir
CN108386170A (en) * 2018-02-01 2018-08-10 中国石油化工股份有限公司 Underground energy consumption characterizing method during a kind of oil reservoir development
CN108446511A (en) * 2018-03-28 2018-08-24 中国石油化工股份有限公司 The reserve forecasting method of fracture-pore reservoir oil, water
CN108756873B (en) * 2018-06-22 2021-06-22 中国海洋石油集团有限公司 Determination method for reducing fluid seepage resistance based on nanotechnology
CN108756873A (en) * 2018-06-22 2018-11-06 中国海洋石油集团有限公司 A kind of determination method reducing fluid neuron network resistance based on nanotechnology
CN111191183A (en) * 2020-01-09 2020-05-22 中国石油大学(北京) Reservoir parameter calculation method, device and equipment
CN112196527A (en) * 2020-11-02 2021-01-08 西南石油大学 Method for determining water body size of fracture-cavity type oil reservoir
CN112196527B (en) * 2020-11-02 2022-02-15 西南石油大学 Method for determining water body size of fracture-cavity type oil reservoir
CN112814653A (en) * 2021-02-05 2021-05-18 西南石油大学 Fracture-cavity type oil reservoir structure judgment method
CN112761582A (en) * 2021-02-05 2021-05-07 西南石油大学 Fracture-cavity type oil reservoir parameter calculation method
CN112761602A (en) * 2021-02-05 2021-05-07 西南石油大学 Far well reserve potential excavating method for fracture-cavity oil reservoir
RU2789784C1 (en) * 2021-02-05 2023-02-09 Саусвест Петролеум Юниверсити Method for calculating the parameters of fractured-cavernous reservoirs
CN112901145A (en) * 2021-03-19 2021-06-04 大庆油田有限责任公司 Volume energy method for analyzing injection-production relation between oil-water wells

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