CN110295895A - Utilize the method for macroscopical flow coefficient dynamic evaluation sandy gravel materials physical property - Google Patents
Utilize the method for macroscopical flow coefficient dynamic evaluation sandy gravel materials physical property Download PDFInfo
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- 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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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Abstract
The present invention relates to oil/gas well formation testing pilot production technical fields, are a kind of method using macroscopical flow coefficient dynamic evaluation reservoir properties, including S1: flowing pressure data daily according to formation testing stage individual well and calculate pressure loss ratio；S2: according to tired yield data and the pressure loss than calculating macroscopical flow coefficient；S3: according to fluctuation situation, the stable macroscopical flow coefficient of each well is chosen；S4: the well testing flow coefficient kh/ μ in statistical regions in well test data；S5: using the macroscopical flow coefficient and well testing flow coefficient of Pressure Curve in Oil Testing Well establish correlation in region；S6: for the layer of non-well testing, macroscopical flow coefficient, inverting well testing flow coefficient are calculated；S7: reservoir thickness, viscosity of crude are searched, the permeability of reservoir is calculated.The present invention realizes only can be understood the fluid ability of fluid in the earth formation, shorten the activity duration, save well testing expense, realize the purpose of evaluation reservoir by the means of production in the hope of formation flow coefficient.
Description
Technical field
The present invention relates to a kind of oil/gas well formation testing pilot production technical fields, are a kind of macroscopical flow coefficient dynamic evaluation sand of utilization
The method of Conglomerate Reservoir physical property.
Background technique
In oil/gas well formation testing production testing operation, the production capacity of dynamic evaluation reservoir is an important process, is generally passed through
Well testing or formation testing operation seek the formation flow coefficient k h/ μ for being able to reflect the complexity that fluid flows in hole
Value is evaluated.It generally needs fracturing reform that could obtain production capacity without natural production capacity after hypotonic sandy gravel materials perforation, but is moving back
During liquid test manufacture, production decline is fast, the parameter accuracy affected that well testing is sought, and well testing, test long construction period, cost
Height, well testing test are unable to all standing, and sandy gravel materials evaluation of physical property is difficult, influences to produce on oil field.It proposes to utilize oil/gas well formation testing
The creation data of production testing operation is sought tiring out and moves back liquid and enter the ratio of well fracturing fluid total amount, pressure loss ratio, this ratio is defined
For macroscopical flow coefficient, it has good correlation with stratum well testing flow coefficient, is able to reflect fluid and flows in hole
Complexity, realize the dynamic evaluation to all well layer physical property.
Summary of the invention
The present invention provides a kind of methods using macroscopical flow coefficient dynamic evaluation sandy gravel materials physical property, overcome
The deficiency for stating the prior art can effectively solve existing sandy gravel materials well testing test long construction period, at high cost and sand
Conglomerate Reservoir evaluation of physical property is difficult, influences the problem of producing on oil field.
The technical scheme is that realized by following measures: it is a kind of to utilize macroscopical flow coefficient dynamic evaluation sand
The method of Conglomerate Reservoir physical property, comprising the following steps:
S1: it flows pressure data daily according to formation testing stage individual well and calculates pressure loss ratio；The calculation formula of pressure loss ratio is such as
Under:
S=(PGround-PStream)/PGround (1)
Wherein, PGroundFor strata pressure, unit are as follows: MPa；PStreamFor stream pressure, unit MPa；
S2: according to tired yield data and the pressure loss than calculating macroscopical flow coefficient, macroscopic view flowing coefficient formulas is such as
Under:
FH=QIt is tired/(QThe total liquid of pressure break*S) (2)
Wherein, QIt is tiredTo tire out yield, unit are as follows: m3；QThe total liquid of pressure breakTo enter well fracturing fluid total amount, unit are as follows: m3；S is the pressure loss
Than；
S3: search research area's well testing stationary phase macroscopical flow coefficient: count and calculate research area in each well testing it is macro
Flow coefficient is seen, if output per day fluctuation is respectively less than 10% in certain well section period, the macroscopical flow coefficient being calculated at this time
Macroscopical flow coefficient as the well stationary phase；
S4: in collection research area in well test data well test analysis permeability ks, reservoir thickness HsWith viscosity of crude μs, will
Permeability ks, reservoir thickness HsWith viscosity of crude μsFormula kh/ μ is substituted into, the well testing flow coefficient is calculated；
S5: carrying out correlation analysis to the macroscopical flow coefficient and well testing flow coefficient of the stationary phase of well testing in research area,
Seek the relationship of macroscopical flow coefficient Yu well testing flow coefficient；
S6: creation data is utilized for the A well of non-well testing, is flowed by the macroscopic view that formula (1) and formula (2) seek A well
Coefficient substitutes into the relationship of macroscopic view flow coefficient obtained in S5 and well testing flow coefficient, reversely calculates the stream of A well again
Dynamic coefficient；
S7: the flow coefficient calculated according to S6 searches the reservoir thickness H of A wellAWith viscosity of crude μAAnd substitute into flow coefficient
In calculation formula kh/ μ, the permeability K of reservoir is soughtAValue.
Here is the further optimization and/or improvements to invention technology described above scheme:
It is above-mentioned that correlation analysis is carried out to macroscopical flow coefficient and well testing flow coefficient in S5, it obtains linearly related
Straight line and exponential form or logarithmic correlation curve.
The present invention seeks macroscopic view flowing factor evaluation in the case where not increasing extra work using daily creation data
The permeability for having taken reservoir realizes the evaluation to each well reservoir properties, and realizing only can be in the hope of by the means of production
Formation flow coefficient understands the fluid ability of fluid in the earth formation, shortens the activity duration, save well testing expense, realizes evaluation
The purpose of reservoir.
Detailed description of the invention
Attached drawing 1 is the method flow diagram of the embodiment of the present invention 1.
The line chart that attached drawing 2 fluctuates at any time for the oil pressure of S2 layers of 013 well of Ma lake of the embodiment of the present invention 2, yield.
The line chart that attached drawing 3 fluctuates at any time for the oil pressure of S2 layers of 16 well of Ma lake of the embodiment of the present invention 2, yield.
The line chart that attached drawing 4 fluctuates at any time for the oil pressure of S1 layers of 24 well of Ma lake of the embodiment of the present invention 2, yield.
The line chart that attached drawing 5 fluctuates at any time for the oil pressure of S1 layers of 29 well of Ma lake of the embodiment of the present invention 2, yield.
Attached drawing 6 is macroscopical flow coefficient of the embodiment of the present invention 2 and the exponential dependence curve graph of well testing flow coefficient.
Specific embodiment
The present invention is not limited by the following examples, can determine according to the technique and scheme of the present invention with actual conditions specific
Embodiment.
Below with reference to examples and drawings, the invention will be further described:
Embodiment 1: as shown in Fig. 1, this utilizes the method for macroscopical flow coefficient dynamic evaluation sandy gravel materials physical property, packet
Include following steps:
S1: it flows pressure data daily according to formation testing stage individual well and calculates pressure loss ratio；The calculation formula of pressure loss ratio is such as
Under:
S=(PGround-PStream)/PGround (1)
Wherein, PGroundFor strata pressure, unit are as follows: MPa；PStreamFor stream pressure, unit are as follows: MPa；
S2: according to tired yield data and the pressure loss than calculating macroscopical flow coefficient；Macroscopic view flowing coefficient formulas is such as
Under:
FH=QIt is tired/(QThe total liquid of pressure break*S) (2)
Wherein, QIt is tiredTo tire out yield, unit are as follows: m3；QThe total liquid of pressure breakTo enter well fracturing fluid total amount, unit are as follows: m3；S is the pressure loss
Than；
S3: search research area's well testing stationary phase macroscopical flow coefficient: count and calculate research area in each well testing it is macro
Flow coefficient is seen, if output per day fluctuation is respectively less than 10% in certain well section period, the macroscopical flow coefficient being calculated at this time
Macroscopical flow coefficient as the well stationary phase；
In the step 3, when statistical query studies macroscopical flow coefficient of the stationary phase of area's well testing, need in obtained number
It is respectively less than 10% according to the output per day in middle certain well section period of lookup, certain period at this refers to two days at least continuous
Interior, the odd-numbered day output fluctuation of the well is less than 10%.
S4: in collection research area in well test data well test analysis permeability ks, reservoir thickness HsWith viscosity of crude μs, will
Permeability ks, reservoir thickness HsWith viscosity of crude μsFormula kh/ μ is substituted into, the well testing flow coefficient is calculated；
S5: carrying out correlation analysis to the macroscopical flow coefficient and well testing flow coefficient of the stationary phase of well testing in research area,
Seek the relationship of macroscopical flow coefficient Yu well testing flow coefficient；
It is related to the progress of well testing flow coefficient to macroscopical flow coefficient of the stationary phase of well testing in research area in above-mentioned S5
Property analysis, macroscopical flow coefficient of stationary phase, which is more advantageous to, accurately reflects the complexity that fluid flows in hole, right
There is preferable guiding significance in other wells not tried in the research area, realize the objective dynamic evaluation to each well layer physical property.
S6: creation data is utilized for the A well of non-well testing, is flowed by the macroscopic view that formula (1) and formula (2) seek A well
Coefficient substitutes into the relationship of macroscopic view flow coefficient obtained in S5 and well testing flow coefficient, reversely calculates the stream of A well again
Dynamic coefficient；
S7: the flow coefficient calculated according to S6 searches the reservoir thickness H of A wellAWith viscosity of crude μAAnd substitute into flow coefficient
In calculation formula kh/ μ, the permeability K of reservoir is soughtAValue.
The reservoir thickness H for the A well searched in the research area's Conventional Logs and S7 collected in above-mentioned S4AIt is viscous with crude oil
Spend μAData belongs to the prior art, therefore can directly extract use.
The present invention seeks macroscopic view flowing factor evaluation in the case where not increasing extra work using daily creation data
The permeability for having taken reservoir realizes the evaluation to each well reservoir properties, and realizing only can be in the hope of by the means of production
Formation flow coefficient understands the fluid ability of fluid in the earth formation, shortens the activity duration, save well testing expense, realizes evaluation
The purpose of reservoir.
As shown in Fig. 1, in S5, correlation analysis is carried out to macroscopical flow coefficient and well testing flow coefficient, obtains line
The relevant straight line of property and exponential form or logarithmic correlation curve.
Embodiment 2: as shown in attached drawing 2 to 6 and table 1,2, macroscopical flow coefficient dynamic evaluation sandy gravel materials object is utilized
Property method be applied to Ma lake region block, comprising the following steps:
The first step collects the means of production in the block of Ma lake region, calculates the daily pressure loss ratio of each well, the meter of pressure loss ratio
It is as follows to calculate formula:
S=(PGround-PStream)/PGround (1)
Wherein, PGroundFor strata pressure, unit are as follows: MPa；PStreamFor stream pressure, unit are as follows: MPa；
Second step, according to tired yield data and the pressure loss macroscopical flow coefficient more daily than calculating, macroscopical flow coefficient
Calculation formula is as follows:
FH=QIt is tired/(QThe total liquid of pressure break*S) (2)
Wherein, QIt is tiredTo tire out yield, unit are as follows: m3；QThe total liquid of pressure breakTo enter well fracturing fluid total amount, unit are as follows: m3；S is the pressure loss
Than；
Third step chooses the value when fluctuation in continuous two days of macroscopical flow coefficient is respectively less than 10% and stablizes macroscopic view as this layer
Flow coefficient；
4th step, as shown in table 1, the statistics Ma lake region block well testing flow coefficient kh/ μ in pressure data again；
5th step utilizes macroscopical flow coefficient of Pressure Curve in Oil Testing Well and well testing flow coefficient opening relationships, Ma lake region in region
The relational expression of block well testing flow coefficient and macroscopical flow coefficient are as follows: y=1.4029e0.1994x, related coefficient reaches 0.8401；
6th step utilizes creation data for the A well of non-well testing as shown in table 2, seeks A by formula (1) and formula (2)
Macroscopical flow coefficient of well substitutes into the relationship of macroscopic view flow coefficient obtained in S5 and well testing flow coefficient, reversely
The flow coefficient of A well is calculated again；
7th step, the flow coefficient calculated as shown in table 2 according to the 6th step search the reservoir thickness H of A wellAIt is viscous with crude oil
Spend μAAnd substitute into flow coefficient calculation formula kh/ μ, seek the permeability K of reservoirAValue.
The present invention the hypotonic sandy gravel materials in Xinjiang Oilfield Ma lake, in turn multiple blocks such as Carboniferous Reservoirs be applied and
Verifying, it is simple and effective, to formation parameter is obtained, cost of exploration & development is reduced, discovery favorable facies belt instructs oil field deployment to have weight
Want meaning.
The above technical characteristic constitutes highly preferred embodiment of the present invention, with stronger adaptability and best implementation effect
Fruit can increase and decrease non-essential technical characteristic, according to actual needs to meet the needs of different situations.
Table 1 studies area's well testing flow coefficient statistical form
Table 2 does not carry out the Pressure Curve in Oil Testing Well computing permeability table of multiple pressure
Claims (2)
1. a kind of method using macroscopical flow coefficient dynamic evaluation sandy gravel materials physical property, it is characterised in that: including following step
It is rapid:
S1: it flows pressure data daily according to formation testing stage individual well and calculates pressure loss ratio；The calculation formula of pressure loss ratio is as follows:
S=(PGround-PStream)/PGround (1)
Wherein, PGroundFor strata pressure, unit are as follows: MPa；PStreamFor stream pressure, unit MPa；
S2: according to tired yield data and the pressure loss than calculating macroscopical flow coefficient, macroscopic view flowing coefficient formulas is as follows:
FH=QIt is tired/(QThe total liquid of pressure break*S) (2)
Wherein, QIt is tiredTo tire out yield, unit are as follows: m3；QThe total liquid of pressure breakTo enter well fracturing fluid total amount, unit are as follows: m3；S is pressure loss ratio；
S3: macroscopical flow coefficient of the stationary phase of research area's well testing is searched: counting and calculate the macroscopic flow of each well testing in research area
Dynamic coefficient, if output per day fluctuation is respectively less than 10% in certain well section period, the macroscopical flow coefficient conduct being calculated at this time
Macroscopical flow coefficient of the well stationary phase；
S4: in collection research area in well test data well test analysis permeability ks, reservoir thickness HsWith viscosity of crude μs, will permeate
Rate ks, reservoir thickness HsWith viscosity of crude μsFormula kh/ μ is substituted into, the well testing flow coefficient is calculated；
S5: correlation analysis is carried out to the macroscopical flow coefficient and well testing flow coefficient of the stationary phase of well testing in research area, is sought
The relationship of macroscopical flow coefficient and well testing flow coefficient；
S6: utilizing creation data for the A well of non-well testing, macroscopical flow coefficient of A well sought by formula (1) and formula (2),
It substitutes into the relationship of macroscopic view flow coefficient obtained in S5 and well testing flow coefficient, reversely calculates the flowing system of A well again
Number；
S7: the flow coefficient calculated according to S6 searches the reservoir thickness H of A wellAWith viscosity of crude μAAnd substitute into flow coefficient calculating
In formula kh/ μ, the permeability K of reservoir is soughtAValue.
2. a kind of method using macroscopical flow coefficient dynamic evaluation sandy gravel materials physical property according to claim 1,
Be characterized in that: in S5, correlation analysis being carried out to macroscopical flow coefficient and well testing flow coefficient, obtain linearly related straight line with
And exponential or logarithmic correlation curve.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112381259A (en) * | 2020-07-20 | 2021-02-19 | 中国石油天然气集团有限公司 | Dynamic capacity prediction calculation method for compact conglomerate reservoir |
| CN112766625A (en) * | 2019-11-01 | 2021-05-07 | 中国石油化工集团有限公司 | Method and system for calculating maximum water yield and acid fracturing construction evaluation indexes of geothermal well |
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| CN112766625A (en) * | 2019-11-01 | 2021-05-07 | 中国石油化工集团有限公司 | Method and system for calculating maximum water yield and acid fracturing construction evaluation indexes of geothermal well |
| CN112381259A (en) * | 2020-07-20 | 2021-02-19 | 中国石油天然气集团有限公司 | Dynamic capacity prediction calculation method for compact conglomerate reservoir |
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