CN106204304B - A kind of poly- determination method for driving permeability saturation curve of Conglomerate Reservoir - Google Patents
A kind of poly- determination method for driving permeability saturation curve of Conglomerate Reservoir Download PDFInfo
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Abstract
The present invention provides a kind of poly- determination methods for driving permeability saturation curve of Conglomerate Reservoir, comprising the following steps: (1) calculates poly- displacement of reservoir oil well composite water cut fw；(2) level-one linear fit relational expression y is established1=ax+b obtains fitting parameter a, b；(3) relative permeability and poly- drive water saturation relational expression are utilizedCalculate different poly- drive water saturation SwUnder poly- drive oil-water relative permeability ratio value(4) second level linear fit relational expression y is established2=k1x1+k2x2+k3, obtain fitting parameter k1、k2And k3；(5) poly- drive different water cut saturation degree S is calculatedwUnder water-oil phase relative permeability Kro、Krw；(6) poly- drive water-oil phase permeability saturation curve is drawn.The poly- determination method for driving permeability saturation curve of Conglomerate Reservoir of the present invention can be quickly obtained the poly- drive permeability saturation curve of more accurate Conglomerate Reservoir, at low cost, high-efficient, greatly reduce workload.
Description
Technical field
The invention belongs to oil development reservoir engineering technical fields, drive opposite infiltration more particularly, to a kind of Conglomerate Reservoir is poly-
The determination method of rate curve.
Background technique
Conglomerate Reservoir have the deposition characteristics different from conventional sandstone reservoir, conventional physical property and complexity pore structure and
Heterogeneous reservoirs in plane and on vertical profile, bring great difficulty to the exploitation of Conglomerate Reservoir.Conglomerate Reservoir infiltration
Rate is one of the important content of oil reservoir development evaluation, and permeability saturation curve reflects the variation of each phase fluid percolation ability in oil reservoir
Rule is the important indicator for predicting oil field development production target and dynamic changes.
During poly- drive, reservoir properties can change Conglomerate Reservoir, and oil-water relative permeability curve is caused to become
Change.Conventional stationarity mainly reflects that rock core mutually seeps relationship with cold store enclosure rock core test measurement rock core permeability saturation curve method,
Whether the Conglomerate Reservoir of strong heterogeneity can be suitably used for it is still necessary to discuss, while permeability saturation curve data is reservoir engineering and oil
The important parameter in numerical simulation engineering calculation work is hidden, well test analysis is studied in the variation of formation rock permeability saturation curve
It influences also very big.
Application No. is 201210276977.7 patents to disclose a kind of side for determining complete oil-water relative permeability curve
Method, this method determine limit oil displacement efficiency and the water phase under different reservoir permeability according to high waterflood flush multiple experimental data
Maximum relative permeability, establish limit oil displacement efficiency, water phase maximum relative permeability with core permeability changing rule and oil
Phase, water phase relative permeability calculation formula.
Application No. is 201020557847.7 patents to disclose a kind of use for laboratory phase permeability curve testing integrated
Device, including container, constant-flux pump, intermediate receptacle, pressure sensor, the core holding unit for being sandwiched between rock core, described device is also
Including data processor, oil water separator and data collector；Container outlet equipped with water connects constant-flux pump, and advection pump discharge is logical
It crosses valve to connect with intermediate receptacle, intermediate receptacle outlet is connect by valve with rock core, and rock core outlet passes through valve and grease point
It is connected from device；Pressure sensor is equipped at core entry and at the top of core holding unit, pressure sensor and data processor connect
It connects, data processor is connect with the data collector for being located at oil water separator top.In the patent energy real-time monitoring experimentation
Pressure trend, fuel-displaced water outlet data and phase percolation curve tendency reduce artificial processing and error in reading.
A kind of rheological property of polymer solution is disclosed application No. is 201110094678.7 to combine with rock core relative permeability
Test device and method.The device include infuse poly- unit, oiling unit, line rheometer, core holding unit, oil-liquid separator,
Differential pressure pickup, electronic weighing instrument, each section are connected by pipeline with control valve.Its method is that rock core is placed in core holding unit
In, using rock core injection of polymer solution example of the poly- unit into core holding unit is infused, pressure difference and data on flows are acquired, is calculated
The relationship of polymer solution viscosity under different flow, the shear rate and flow that are incorporated in line rheometer show that polymer is molten
The rheological curve of liquid；The polymer solution in rock core is driven away with the oiling of oiling unit, infuses polymerization into rock core with poly- unit is infused
Object solution carries out the displacement of reservoir oil, and oil-liquid separator measures the variation of oil mass in real time in displacement process, electronic weighing instrument measure in real time oil and
The variation of the total liquid measure of polymer；Finally polymer is carried out with the flow, oil production, Liquid output, pressure difference and the time data that obtain
The relative leakage of solution and oil calculates.
The Experimental Method in Laboratory of said determination relative permeability, consuming time is long for test, it is desirable that and it is high, it is expensive, it is artificial to miss
It is poor big, it is difficult to guarantee the representativeness and accuracy of measurement result, while the limitation of rock core test, it is also difficult to really react gravel
Shale oil hides the behavioral characteristics in development process.
Summary of the invention
In view of the above technical problems, permeability saturation curve is driven for description Conglomerate Reservoir is poly-, utilizes the exploitation of Conglomerate Reservoir
Data, the present invention are provided a kind of poly- determination method for driving permeability saturation curve of Conglomerate Reservoir, are accurately calculated using dynamic data
Conglomerate Reservoir is poly- to drive permeability saturation curve, and with accurate characterization Conglomerate Reservoir behavioral characteristics, overcoming experimental determination rock core has
Permeability and the excessive disadvantage of actual formation effective permeability deviation are imitated, the strong heterogeneity feature of Conglomerate Reservoir has been comprehensively considered and has built
Vertical effective permeability computation model provides effective support for oil field development prediction, has important practical significance.
The technical solution adopted by the present invention is that:
A kind of poly- determination method for driving permeability saturation curve of Conglomerate Reservoir, comprising the following steps:
(1) poly- displacement of reservoir oil well composite water cut f is calculatedw
In formula: fwFor poly- displacement of reservoir oil well composite water cut, decimal；qwFor moon water yield, m3/d；ρwFor poly- expelling water phase density, g/
cm3；qoFor monthly oil production, t/d；
(2) level-one linear fit relational expression y is established1=ax+b, the f as obtained in step (1)w, fitting parameter a, b are obtained,
Fitting precision R1, wherein
B in formulaoFor poly- displacement of reservoir oil phase volume coefficient, decimal；μoFor viscosity of crude, mPas；μwFor poly- expelling water phase viscosity,
mPa·s；ρoFor poly- expelling water phase density, g/cm3；NPFor cumulative oil production, × 104t；N is oil in place × 104t；
(3) fitting parameter a and b as obtained in step (2) utilize relative permeability and poly- drive water saturation relational expressionCalculate different poly- drive water saturation SwUnder poly- drive oil-water relative permeability ratio value
(4) second level linear fit relational expression y is established2=k1x1+k2x2+k3, and as obtained in step (3)It obtains
Fitting parameter k1、k2And k3, fitting precision R2, wherein
S in formulaorResidual oil saturation, decimal are driven to be poly-；SwiIrreducible water saturation, decimal are driven to be poly-；
(5) the fitting parameter k as obtained in step (4)1、k2And k3, calculate poly- drive different water cut saturation degree SwUnder grease
Two-phase relative permeability Kro、Krw；
Wherein:
KroOil relative permeability, decimal are driven to be poly-；For the opposite infiltration of the poly- oil driven under irreducible water saturation
Rate, decimal；KrwFor poly- expelling water phase relative permeability, decimal；It is permeated for the poly- water phase driven under residual oil saturation is opposite
Rate, decimal；SwStratum water saturation, decimal are driven to be poly-；
(6) according to the poly- drive oil relative permeability K for calculating acquisition in step (5)ro, poly- expelling water phase relative permeability Krw
Data draw poly- drive water-oil phase permeability saturation curve.
The poly- determination method for driving permeability saturation curve of Conglomerate Reservoir of the present invention, wherein in step (3)
The invention has the advantages that:
The poly- determination method for driving permeability saturation curve of Conglomerate Reservoir of the present invention, Method And Principle is clear, quantification,
Strong operability is easy to use, and the construction operation for reservoir numerical simulation, subsequent development program prediction and scene provides more
Add reliable reference frame.The present invention can be quickly obtained the poly- drive permeability saturation curve of more accurate Conglomerate Reservoir, at low cost,
It is high-efficient, greatly reduce workload.For the block there are rock core displacement test data, can be driven by comparison amendment laboratory core
For test result, effectively reduces experimental error and save experimental period.Meanwhile the method achieve reservoir engineering methods and oil reservoir
The combination of Physical Experiment, it is other similar with stronger reference function to solving the problems, such as.
Detailed description of the invention
Fig. 1 is the poly- drive water-oil phase permeability saturation curve figure in the present invention.
Below in conjunction with specific embodiments and the drawings, the invention will be further described.
Specific embodiment
The poly- determination method for driving permeability saturation curve of a kind of Conglomerate Reservoir of the present embodiment, with Karamay, Xinjiang A1 well gravel
For the poly- drive in shale oil hiding, comprising the following steps:
(1) poly- displacement of reservoir oil well composite water cut f is calculatedw
In formula: fwFor poly- displacement of reservoir oil well composite water cut, decimal；qwFor moon water yield, m3/d；ρwFor poly- expelling water phase density, g/
cm3；qoFor monthly oil production, t/d；
(2) level-one linear fit relational expression y is established1=ax+b, the f as obtained in step (2)w, fitting parameter a, b are obtained,
Fitting precision R1, wherein
B in formulaoFor poly- displacement of reservoir oil phase volume coefficient, decimal；μoFor viscosity of crude, mPas；μwFor poly- expelling water phase viscosity,
mPa·s；ρoFor poly- expelling water phase density, g/cm3；NPFor cumulative oil production, × 104t；N is oil in place × 104T, polymer flooding parameters
Basic data and poly- drive creation data difference are as shown in Table 1 and Table 2；
(3) fitting parameter a and b as obtained in step (2) utilize relative permeability and poly- drive water saturation relational expressionCalculate different poly- drive water saturation SwUnder poly- drive oil-water relative permeability ratio valueWhereinCalculated result is as shown in table 3；
(4) second level linear fit relational expression y is established2=k1x1+k2x2+k3, and as obtained in step (3)It obtains
Fitting parameter k1、k2And k3, fitting precision R2, wherein
S in formulaorResidual oil saturation, decimal are driven to be poly-；SwiIrreducible water saturation, decimal are driven to be poly-；
(5) the fitting parameter k as obtained in step (4)1、k2And k3, calculate poly- drive different water cut saturation degree SwUnder grease
Two-phase relative permeability Kro、Krw；
Wherein:
KroOil relative permeability, decimal are driven to be poly-；For the opposite infiltration of the poly- oil driven under irreducible water saturation
Rate, decimal；KrwFor poly- expelling water phase relative permeability, decimal；It is permeated for the poly- water phase driven under residual oil saturation is opposite
Rate, decimal；SwStratum water saturation, decimal are driven to be poly-；
(6) according to calculating in step (5), the calculating obtained acquisition is poly- to drive oil relative permeability Kro, poly- expelling water is opposite seeps
Saturating rate KrwData, calculated result is as shown in table 3, draws poly- drive water-oil phase permeability saturation curve, the poly- displacement of reservoir oil water two of drafting
Phase permeability saturation curve is as shown in Figure 1.
Table 1 inputs polymer flooding parameters base data table
| N(×104t) | ρo(g/cm3) | μo(mPa·s) | Bo | Swi | Kro(Swi) |
| 200 | 0.833 | 2.41 | 1.16 | 0.29 | 1 |
| ρw(g/cm3) | μw(mPa·s) | Bw | Sor | Krp(Sor) | |
| 1.311 | 3.21 | 1.02 | 0.27 | 0.892 |
Table 2 is poly- to drive creation data table
3 oil of table, water phase relative permeability Kro、KrwCalculated result
| Sw | kro/krw | Kro | Krw |
| 0.29 | 1 | 0 | |
| 0.30 | 13809.1542 | 0.9176 | 0 |
| 0.33 | 4048.5594 | 0.709 | 0 |
| 0.36 | 1186.9542 | 0.5375 | 0.0003 |
| 0.39 | 347.9905 | 0.3985 | 0.0013 |
| 0.41 | 102.0236 | 0.2878 | 0.004 |
| 0.44 | 29.9112 | 0.2016 | 0.0096 |
| 0.47 | 8.7694 | 0.1359 | 0.0201 |
| 0.50 | 2.571 | 0.0875 | 0.0376 |
| 0.53 | 0.7538 | 0.0531 | 0.0651 |
| 0.56 | 0.221 | 0.0299 | 0.1059 |
| 0.59 | 0.0648 | 0.0151 | 0.1639 |
| 0.62 | 0.019 | 0.0066 | 0.2436 |
| 0.64 | 0.0056 | 0.0022 | 0.3502 |
| 0.67 | 0.0016 | 0.0005 | 0.4894 |
| 0.70 | 0.0005 | 0 | 0.6675 |
| 0.73 | 0.0001 | 0 | 0.8917 |
Embodiment described above only describe the preferred embodiments of the invention, not to model of the invention
It encloses and is defined, without departing from the spirit of the design of the present invention, those of ordinary skill in the art are to technical side of the invention
The various changes and improvements that case is made should all be fallen into the protection scope that claims of the present invention determines.
Claims (1)
1. a kind of poly- determination method for driving permeability saturation curve of Conglomerate Reservoir, it is characterised in that: the following steps are included:
(1) poly- displacement of reservoir oil well composite water cut f is calculatedw
In formula: fwFor poly- displacement of reservoir oil well composite water cut, decimal；qwFor moon water yield, m3/d；ρwFor poly- expelling water phase density, g/cm3；
qoFor monthly oil production, t/d；
(2) level-one linear fit relational expression y is established1=ax+b, the f as obtained in step (1)w, fitting parameter a, b are obtained,
In,
B in formulaoFor poly- displacement of reservoir oil phase volume coefficient, decimal；μoFor viscosity of crude, mPas；μwFor poly- expelling water phase viscosity, mPas；
ρoFor poly- expelling water phase density, g/cm3；NPFor cumulative oil production, × 104t；N is oil in place × 104t；
(3) fitting parameter a and b as obtained in step (2) utilize relative permeability and poly- drive water saturation relational expressionCalculate different poly- drive water saturation SwUnder poly- drive oil-water relative permeability ratio value
(4) second level linear fit relational expression y is established2=k1x1+k2x2+k3, and as obtained in step (3)Obtain fitting ginseng
Number k1、k2And k3, wherein
S in formulaorResidual oil saturation, decimal are driven to be poly-；SwiIrreducible water saturation, decimal are driven to be poly-；
(5) the fitting parameter k as obtained in step (4)1、k2And k3, calculate poly- drive different water cut saturation degree SwUnder water-oil phase
Relative permeability Kro、Krw；
Wherein:
KroOil relative permeability, decimal are driven to be poly-；It is small for the poly- oil relative permeability driven under irreducible water saturation
Number；KrwFor poly- expelling water phase relative permeability, decimal；It is small for the poly- water phase relative permeability driven under residual oil saturation
Number；SwStratum water saturation, decimal are driven to be poly-；
(6) according to the poly- drive oil relative permeability K for calculating acquisition in step (5)ro, poly- expelling water phase relative permeability KrwData,
Draw poly- drive water-oil phase permeability saturation curve；
In step (3)
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| US9341557B2 (en) * | 2012-11-14 | 2016-05-17 | Kuwait Oil Company (K.S.C.) | Method and system for permeability calculation using production logs for horizontal wells, using a downhole tool |
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| US9650561B2 (en) * | 2013-06-18 | 2017-05-16 | Titan Oil Recovery, Inc. | Method of biological permeability modification of oil reservoirs using resident microorganisms and nutrient supplementation |
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| CN103573234A (en) * | 2012-08-06 | 2014-02-12 | 中国石油化工股份有限公司 | Method for determining complete oil and water relative permeability curve |
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