CN108180007A - Old filed economic limit drilling well potentiality and recovery ratio measuring and calculating new method - Google Patents
Old filed economic limit drilling well potentiality and recovery ratio measuring and calculating new method Download PDFInfo
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- CN108180007A CN108180007A CN201711438545.0A CN201711438545A CN108180007A CN 108180007 A CN108180007 A CN 108180007A CN 201711438545 A CN201711438545 A CN 201711438545A CN 108180007 A CN108180007 A CN 108180007A
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- 238000011084 recovery Methods 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000005553 drilling Methods 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000011161 development Methods 0.000 claims abstract description 28
- 238000004364 calculation method Methods 0.000 claims description 12
- 235000020681 well water Nutrition 0.000 claims description 3
- 239000002349 well water Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 238000011156 evaluation Methods 0.000 abstract description 6
- 238000007796 conventional method Methods 0.000 abstract description 4
- 238000006073 displacement reaction Methods 0.000 description 5
- 238000005065 mining Methods 0.000 description 4
- 239000003129 oil well Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
Classifications
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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
- E21B47/00—Survey of boreholes or wells
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Abstract
The present invention provides a kind of old filed economic limit drilling well potentiality and recovery ratio measuring and calculating new method, and the old filed economic limit drilling well potentiality and recovery ratio measuring and calculating new method include：Step 1, stepout well Single Well Economic limited recoverable reserves are determined；Step 2, stepout well recovery ratio is determined；Step 3, stepout well single well-controlled economic limit oil in place is determined；Step 4, economic limit stepout well potentiality are calculated；Step 5, economic ultimate recovery is calculated.The old filed economic limit drilling well potentiality and recovery ratio measuring and calculating new method overcome contradiction of the conventional method in the application of ultra-high water-containing development late stage, can meet the economic limit stepout well potentiality of ultra-high water cut stage oil reservoir and the needs of economic ultimate recovery calculating.Therefore, can more objective evaluation oil reservoir development potentiality, instruct oil field development production practices.
Description
Technical field
The present invention relates to oil-gas field development technical field, especially relate to a kind of old filed economic limit drilling well potentiality and
Recovery ratio calculates new method.
Background technology
At present, oil field stepout well potentiality general on mining site are generally surveyed using " well spacing density and recovery ratio relational expression "
It calculates.The development block that the relational expression is some simple structures such as Yi Shengtuo, isolated island, oil area is big, permeability is high is sample point
Obtained empirical equation is returned, i.e.,
Wherein：
ER- recovery ratio, decimal；
Ke- effective permeability, μm2；
μo- oil viscosity, mPas；
N-well spacing density, mouth/km2；
This method has preferable directive function for the infilling adjustment of aqueous development period low in oil field, but contains into height
After water development period, this method and the gap that development and production are put into practice are increasing.It is mainly reflected in three aspects：First, from formula sheet
Body is seen, with the increase of well spacing density, swept volume increase, oil displacement efficiency are constant.And laboratory test and mining site practice prove,
Input stepout well infilled well pattern, which reduces injector producer distance, can increase displacement pressure difference between well, and then improve oil displacement efficiency；And with
The increasing of well spacing density, the influence to oil displacement efficiency is more and more apparent, this factor is not reflected in former formula.Second is that it passes
The calculation formula of system method only relates to reservoir geology, development parameters, does not account for the influence of economic factor, to mining site practical operation
Directiveness it is not strong.Third, conventional method results of measuring is with actual development production status, there are contradictions, e.g., part ultra-high water cut stage
The well spacing density of oil reservoir has been over maximum excavation depth, but still with development benefit.It can be seen that conventional method can not
Ultra-high water cut stage old filed development and production is effectively instructed to put into practice.We have invented a kind of new old filed economic limit drilling wells thus
Potentiality and recovery ratio measuring and calculating new method, solve more than technical problem.
Invention content
The object of the present invention is to provide one kind to be dived with the cost-effective stepout well of accurate evaluation ultra-high water cut stage old filed
The evaluation method of power and corresponding recovery ratio.
The purpose of the present invention can be achieved by the following technical measures：Old filed economic limit drilling well potentiality and recovery ratio are surveyed
New method is calculated, the old filed economic limit drilling well potentiality and recovery ratio measuring and calculating new method include：Step 1, stepout well individual well is determined
Economic limit recoverable reserves；Step 2, stepout well recovery ratio is determined；Step 3, stepout well single well-controlled economic limit geology is determined
Reserves；Step 4, economic limit stepout well potentiality are calculated；Step 5, economic ultimate recovery is calculated.
The purpose of the present invention can be also achieved by the following technical measures：
In step 1, using dynamic cash flow method, Single Well Economic limited recoverable reserves and oil price relationship plate are established, from
And determine economic limit recoverable reserves of the stepout well under the conditions of certain oil price, certain drilling well well depth.
In step 2, calculating development block in recent years or oil field stepout well increases recoverable reserves；Utilize virgin charter water-driven
With reserves formula, the water drive mining-employed reserves of stepout well reality are calculated；According to the practical water drive reserves development degree meter of unit or oil field
Calculate the corresponding oil in place of stepout well；According to the corresponding recoverable reserves of stepout well and oil in place, stepout well recovery ratio is asked for.
In step 2, for the virgin charter water drive mining-employed reserves formula used for Nd=7.5/B, coefficient B is A type Water-flooding characteristics
Slope of a curve；The calculation formula of stepout well oil in place is：Stepout well oil in place=stepout well water drive mining-employed reserves/reality
Water drive reserves development degree；The calculation formula of stepout well recovery ratio is：Stepout well recovery ratio=corresponding the recoverable reserves of stepout well/
Oil in place * 100.
In step 3, the new well that the stepout well Single Well Economic limited recoverable reserves and step 2 obtained according to step 1 obtain
Stepout well single well-controlled economic limit oil in place is calculated in recovery ratio.
In step 3, the calculation formula of single well-controlled economic limit oil in place is：Single well-controlled economic limit geology is stored up
Amount=Single Well Economic limited recoverable reserves/recovery ratio.
In step 4, it is obtained according to the single well-controlled remaining geologic reserves of current development block or oil field reality with step 3
Stepout well single well-controlled economic limit oil in place gap, calculate economic limit stepout well workload.
In step 4, the calculation formula of stepout well workload is：Stepout well workload=remaining geologic reserves/individual well control
Economic limit oil in place-remaining geologic reserves/practical single well-controlled remaining geologic reserves processed.
In steps of 5, recoverable reserves scale, computing unit or oilfield economic ultimate recovery are increased according to stepout well.
In steps of 5, the calculation formula of economic ultimate recovery is：Economic ultimate recovery=(recoverable reserves+stepout well
Increase recoverable reserves)/oil in place * 100%.
Old filed economic limit drilling well potentiality and recovery ratio measuring and calculating new method in the present invention, introduce economic factor, will
Economical and effective calculates constraints as potentiality；Stepout well recovery ratio is determined according to the objective exploitation rule of mining site, is embodied note and is adopted
Well spacing changes the influence to oil displacement efficiency, overcomes contradiction of the conventional method in the application of ultra-high water-containing development late stage, Ke Yiman
The needs that the economic limit stepout well potentiality and economic ultimate recovery of sufficient ultra-high water cut stage oil reservoir calculate.It therefore, can be more
Objective evaluation oil reservoir development potentiality, instruct oil field development production practices.
Description of the drawings
Fig. 1 is the specific embodiment that the old filed economic limit drilling well potentiality of the present invention and recovery ratio calculate new method
Flow chart；
Fig. 2 is that the Single Well Economic limited recoverable reserves in the specific embodiment of the present invention are calculated with well depth, oil price relationship
Plate；
Fig. 3 is the stepout well economically recoverable prediction graph in the specific embodiment of the present invention；
Fig. 4 is the stepout well A type WATER FLOODING CHARACTERISTIC CURVE figure in the specific embodiment of the present invention.
Specific embodiment
For enable the present invention above and other objects, features and advantages be clearer and more comprehensible, it is cited below particularly go out preferable implementation
Example, and coordinate shown in attached drawing, it is described in detail below.
Step 1, stepout well Single Well Economic limited recoverable reserves are determined.Using dynamic cash flow method, Single Well Economic pole is established
Recoverable reserves and oil price relationship plate are limited, so as to can determine economy of the stepout well under the conditions of certain oil price, certain drilling well well depth
Limited recoverable reserves.
Step 2, stepout well recovery ratio is determined.Calculating development block in recent years or oil field stepout well increases recoverable reserves；Profit
With virgin charter water drive mining-employed reserves formula Nd=7.5/B (coefficient B is the slope of A type WATER FLOODING CHARACTERISTIC CURVE), it is real to calculate stepout well
The water drive mining-employed reserves on border；The corresponding oil in place of stepout well is calculated according to the practical water drive reserves development degree of unit or oil field,
Stepout well oil in place=stepout well water drive mining-employed reserves/practical water drive reserves development degree；It is adopted according to stepout well is corresponding
Reserves and oil in place ask for stepout well recovery ratio, the corresponding recoverable reserves of stepout well recovery ratio=stepout well/oil in place *
100%.
Step 3, stepout well single well-controlled economic limit oil in place is determined.It is passed through according to the stepout well individual well that step 1 obtains
The new well recovery that Ji limited recoverable reserves and step 2 obtain, is calculated stepout well single well-controlled economic limit oil in place,
Single well-controlled economic limit oil in place=Single Well Economic limited recoverable reserves/recovery ratio.
Step 4, economic limit stepout well potentiality are calculated.According to the single well-controlled of current development block or oil field reality residue
The gap of stepout well single well-controlled economic limit oil in place that oil in place is obtained with step 3 calculates economic limit stepout well
Workload.Stepout well workload=remaining geologic reserves/single well-controlled economic limit oil in place-remaining geologic reserves/reality
Single well-controlled remaining geologic reserves.
Step 5, economic ultimate recovery is calculated.Recoverable reserves scale, computing unit or oil field warp are increased according to stepout well
Help ultimate recovery, economic ultimate recovery=(recoverable reserves+stepout well increases recoverable reserves)/oil in place * 100%.
To the east of for the pungent pungent Unit 16 in oil field, economic limit stepout well workload and recovery ratio are calculated using this method.Such as
Shown in Fig. 1, Fig. 1 is the stream of the old filed economic limit drilling well potentiality of the present invention and the specific embodiment of recovery ratio measuring and calculating new method
Cheng Tu.
Unit oil area 2.5km2, mining-employed reserves 941 × 104T, recoverable reserves 441 × 104T demarcates recovery ratio
46.9%, 2220~2720m of reservoir buried depth, average well depth 2550m.62 mouthfuls of production well at present, individual well daily oil production 1.8t/d,
Comprehensive water cut 93.9%, unit cumulative oil production 405.46 × 104t。
In a step 101, using dynamic cash flow method, Single Well Economic limited recoverable reserves are calculated.I.e. certain technology,
Under economic condition, income of the oil well within the evaluation phase disclosure satisfy that minimum requirements of the enterprise to investment repayment, tired in the evaluation phase
Product yield is Single Well Economic limited recoverable reserves (as shown in Figure 2).Cell-average well depth 2550m, 40 $ of oil price/bbl,
Single Well Economic limited recoverable reserves when 50 $/bbl, 60 $/bbl, 70 $/bbl, 80 $/bbl are respectively 1.58 × 104t、1.22
×104t、1.03×104t、0.86×104t、0.76×104t。
In step 103, according to the unit 12 fresh oil well development data gone into operation in 2014, this batch of oil well production is predicted extremely
Cumulative oil production when is produced from economic limit end, i.e. stepout well economically recoverable 8.26 × 104T (as shown in Figure 3)；Utilize virgin constitution
Chapter water drive mining-employed reserves formula Nd=7.5/B calculate the practical water drive reserves employed of stepout well for 7.5/0.1352=55.5 ×
104T (coefficient B value is as shown in Figure 4)；According to the practical water-flooding performance 80% of unit, stepout well is calculated correspondingly
Matter reserves are 55.5/0.8=69.3 × 104t；According to the corresponding economically recoverable of stepout well and oil in place, ask for newly boring
Well recovery is 8.26/69.3=11.9%.
Wherein：
Nd- water drive mining-employed reserves, 104t；
B-coefficient, decimal.
In step 105, stepout well Single Well Economic limited recoverable reserves and step under the different oil prices obtained according to step 101
The minimum single well-controlled oil in place under the conditions of stepout well economical and effective is calculated in rapid 103 obtained stepout well recovery ratios.It should
Single well-controlled economic limit oil in place of the unit in 40 $ of oil price/bbl, 50 $/bbl, 60 $/bbl, 70 $/bbl, 80 $/bbl
Respectively 13.26 × 104T/ mouthfuls, 10.24 × 104T/ mouthfuls, 8.64 × 104T/ mouthfuls, 7.22 × 104T/ mouthfuls, 6.38 × 104T/ mouthfuls.
Such as, single well-controlled economic limit oil in place=0.76/0.119=6.38 (ten thousand tons/mouthful) under the conditions of 80 $/bbl.
In step 107, the stepout well single well-controlled economic limit oil in place and unit obtained according to step 105 is current
Practical single well-controlled remaining geologic reserves 8.64 × 104T/ mouthfuls of gap calculates stepout well potentiality.The unit is less than 60 in oil price
Under the conditions of $/bbl, no stepout well potentiality；Under the conditions of oil price is 60 $/bb, 70 $/bbl, 80 $/bbl, stepout well potentiality difference
It is 0 mouthful, 12 mouthfuls and 22 mouthfuls.Such as, stepout well workload=(941-405.46)/6.38- (941- under the conditions of 80 $/bbl
405.46)/8.65=84-62=22 (mouth).
In step 109, according to what is obtained in the Single Well Economic limited recoverable reserves and step 107 obtained in step 101
Economic limit stepout well workload, computing unit economic ultimate recovery.Under the conditions of 70 $/bbl, newly increased recoverable reserves 0.86*
12=10.32 × 104T, unit economic ultimate recovery are=(441+10.32)/941=48.0%；Under the conditions of 80 $/bbl,
Newly increased recoverable reserves are 0.76*22=16.72 × 104T, unit economic ultimate recovery are=(441+16.72)/941=
48.6%.
Claims (10)
1. old filed economic limit drilling well potentiality and recovery ratio measuring and calculating new method, which is characterized in that the old filed economic limit bores
Well potentiality and recovery ratio measuring and calculating new method include：
Step 1, stepout well Single Well Economic limited recoverable reserves are determined；
Step 2, stepout well recovery ratio is determined；
Step 3, stepout well single well-controlled economic limit oil in place is determined；
Step 4, economic limit stepout well potentiality are calculated；
Step 5, economic ultimate recovery is calculated.
2. old filed economic limit drilling well potentiality according to claim 1 and recovery ratio measuring and calculating new method, which is characterized in that
In step 1, using dynamic cash flow method, Single Well Economic limited recoverable reserves and oil price relationship plate are established, so that it is determined that newly
Economic limit recoverable reserves of the drilling well under the conditions of certain oil price, certain drilling well well depth.
3. old filed economic limit drilling well potentiality according to claim 1 and recovery ratio measuring and calculating new method, which is characterized in that
In step 2, calculating development block in recent years or oil field stepout well increases recoverable reserves；Utilize virgin charter water drive mining-employed reserves public affairs
Formula calculates the water drive mining-employed reserves of stepout well reality；Stepout well is calculated according to the practical water drive reserves development degree of unit or oil field
Corresponding oil in place；According to the corresponding recoverable reserves of stepout well and oil in place, stepout well recovery ratio is asked for.
4. old filed economic limit drilling well potentiality according to claim 3 and recovery ratio measuring and calculating new method, which is characterized in that
In step 2, for the virgin charter water drive mining-employed reserves formula used for Nd=7.5/B, coefficient B is oblique for A type WATER FLOODING CHARACTERISTIC CURVE
Rate；The calculation formula of stepout well oil in place is：Stepout well oil in place=stepout well water drive mining-employed reserves/practical water drive reserves
Development degree；The calculation formula of stepout well recovery ratio is：The corresponding recoverable reserves of stepout well recovery ratio=stepout well/geology storage
Amount * 100.
5. old filed economic limit drilling well potentiality according to claim 1 and recovery ratio measuring and calculating new method, which is characterized in that
In step 3, the new well recovery that the stepout well Single Well Economic limited recoverable reserves and step 2 obtained according to step 1 obtain, meter
Calculation obtains stepout well single well-controlled economic limit oil in place.
6. old filed economic limit drilling well potentiality according to claim 5 and recovery ratio measuring and calculating new method, which is characterized in that
In step 3, the calculation formula of single well-controlled economic limit oil in place is：Single well-controlled economic limit oil in place=individual well
Economic limit recoverable reserves/recovery ratio.
7. old filed economic limit drilling well potentiality according to claim 1 and recovery ratio measuring and calculating new method, which is characterized in that
In step 4, the stepout well obtained according to current development block or the single well-controlled remaining geologic reserves of oil field reality with step 3
The gap of single well-controlled economic limit oil in place calculates economic limit stepout well workload.
8. old filed economic limit drilling well potentiality according to claim 7 and recovery ratio measuring and calculating new method, which is characterized in that
In step 4, the calculation formula of stepout well workload is：Stepout well workload=remaining geologic reserves/single well-controlled economy pole
Limit oil in place-remaining geologic reserves/practical single well-controlled remaining geologic reserves.
9. old filed economic limit drilling well potentiality according to claim 1 and recovery ratio measuring and calculating new method, which is characterized in that
In steps of 5, recoverable reserves scale, computing unit or oilfield economic ultimate recovery are increased according to stepout well.
10. old filed economic limit drilling well potentiality according to claim 1 and recovery ratio measuring and calculating new method, feature exist
In in steps of 5, the calculation formula of economic ultimate recovery is：Economic ultimate recovery=(recoverable reserves+stepout well increases
Recoverable reserves)/oil in place * 100%.
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