CN104929594B - Oil well measure effect evaluation method - Google Patents
Oil well measure effect evaluation method Download PDFInfo
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Abstract
The present invention provides a kind of oil well measure effect evaluation method, and the oil well measure effect evaluation method includes：Step 1, oil well economic limit oil production is determined；Step 2, the change of production trend of prediction oil well not in the case of implementing measure；Step 3, judge whether measure is effective；Step 4, the measure term of validity of oil well is calculated；And step 5, calculate the oil increment from stimulation of oil well.The oil well measure effect evaluation method more meets objective law, and measure effect contrast a reference value is not definite value, is not implemented by measure to be limited in year, so that the effect of increasing production after accurate evaluation oil well implementing measure, instructs oil field development production practices.
Description
Technical field
The present invention relates to oil field development technical field, a kind of oil well measure effect evaluation method is especially related to.
Background technology
Existing oil well measure effect evaluation method is on the mining site of current oil field：The oily ability of individual well day and measure after measure
It is the effective Rule of judgment of measure that the difference of the oily ability of preceding individual well day, which is more than 1,；In the case of measure is effective, calculating measure has then
Accumulative oil increment in the effect phase, the leading indicator evaluated as measure effect.Wherein, the moon, oil increment was equal to the individual well day after measure
The difference and the product of calendar number of days of the oily ability of individual well day before oily ability and measure, it is in the measure phase good for the year of issue only to add up oil increment
Moon oil increment sum.
Current methods are clearly disadvantageous in the presence of 2 points on mining site：One is that the oily ability of individual well before traditional algorithm measure day is usual
The day oily ability of last month or some month before measure are taken, is a fixed numerical value, is contrasted as measure effect
A reference value.And in the actual development production process of oil field, in the case of the not upper measure of oil well, the oily ability of individual well day follows certain
Production decline law changes, and is not a definite value.Therefore, the oily ability of fixation individual well day of certain month before measure is contrasted as measure effect
A reference value do not meet the objective law of oil well production.Two be that the calculating of the measure term of validity is confined to the current year of measure implementation
It is interior, the calculating that straddles over year is not carried out to measure effect of increasing production, in fact only oil increment straddled over year and random time section
Interior calculating could truly reflect the actual effect and economic benefit of measure volume increase.For this, we have invented a kind of new oil well
Measure effect evaluation method, solves above technical problem.
The content of the invention
It is an object of the invention to provide it is a kind of can be with the evaluation method of the effect of increasing production after accurate evaluation oil well implementing measure.
The purpose of the present invention can be achieved by the following technical measures：Oil well measure effect evaluation method, the oil well measure
Effect evaluation method includes：Step 1, oil well economic limit oil production is determined；Step 2, predict oil well not in the case of implementing measure
Change of production trend；Step 3, judge whether measure is effective；Step 4, the measure term of validity of oil well is calculated；And step 5, meter
Calculate the oil increment from stimulation of oil well.
The purpose of the present invention can be also achieved by the following technical measures：
In step 1, according to Profit and loss balance principle, individual well daily fluid production rate and economic limit implication Core analysis are set up, really
Economic limit oil production of the stand oil well under certain oil price, certain individual well daily fluid production rate.
Economic limit implication refers to when oil field or oil development to certain phase, and its is aqueous when reaching a certain numerical value, then
The after-tax output value of well oil output is equal to running cost, if aqueous be further continued for rise, not only without profit, there is also thanks to
Damage, now oil field or the aqueous of oil well are referred to as economic limit implication.
In step 2, according to the exploitation rule before oil well implementing measure, when predicting the oil well production to economic limit implication
Change of production trend；When it is aqueous be higher than economic limit implication after, oil well individual well day oil productive capacity value is 0.
In step 3, the oily ability of measure individual well actual after implementing day is more than economic limit oil production, and more than oil well not
The oily ability of individual well day predicted in the case of implementing measure, is used as the effective Rule of judgment of measure.
In step 4, to measure failure from implementing from measure, the time undergone is that the measure of oil well is effective
Phase.
In steps of 5, oil-producing and the accumulative oil-producing of not implementing measure prediction are actually added up in the measure term of validity, after implementing measure
Difference, as oil well oil increment from stimulation.
The present invention proposes a kind of oil well measure dynamic effect evaluation method for more meeting objective law, opens according to oil well is objective
Hair rule determines a reference value of measure effect contrast, considers the oil increasing effect in the actually active phase after measure is implemented, and is not arranged
Apply the limitation of implementation year.It therefore, it can judge the implementation result of mining site oil well measure exactly, instruct oil field development production real
Trample.
Brief description of the drawings
Fig. 1 is the flow chart of a specific embodiment of the oil well measure effect evaluation method of the present invention；
Fig. 2 is the individual well daily fluid production rate and economic limit implication graph of a relation in the specific embodiment of the present invention；
Fig. 3 is oil well output prediction curve in the case of the not implementing measure in the specific embodiment of the present invention；
Actual production data and not implementing measure before and after Fig. 4 is implemented for the oil well measure in the specific embodiment of the present invention
Oil well output anticipation trend comparison diagram.
Embodiment
For enable the present invention above and other objects, features and advantages become apparent, it is cited below particularly go out preferable implementation
Example, and coordinate institute's accompanying drawings, it is described in detail below.
As shown in figure 1, flow charts of the Fig. 1 for a specific embodiment of the oil well measure effect evaluation method of the present invention.
In a step 101, oil well economic limit oil production is determined.According to Profit and loss balance principle, individual well daily fluid production rate is set up
With economic limit implication Core analysis, economic limit oil production of the oil well under certain oil price, certain individual well daily fluid production rate is determined.
So-called economic limit implication, refers to when certain phase is arrived in oil field (or oil well) exploitation, and its is aqueous when reaching a certain numerical value, oily then
The after-tax output value of well oil production is equal to running cost, if aqueous be further continued for rise, not only without profit, there is also loss,
Now the aqueous of oil field (or oil well) is referred to as economic limit implication.Now oily well yield is the production of economic limit end.According to
Profit and loss balance principle, carries out integrating gain and loss analysis to yield, cost and profit, determines breakeven point, obtaining oil price is respectively
When 50 $/bbl, 60 $/bbl, 70 $/bbl, the corresponding economic limit implication of different individual well daily fluid production rates, as shown in Figure 2.
Such as, economic limit implication when individual well Liquid output 30t/d, 70 $ before oil well AA measures/bbl is 96.6%, economic pole
Limited production oil mass is 1.0t/d.
In step 103, the change of production trend of prediction oil well not in the case of implementing measure.According to before oil well implementing measure
Exploitation rule, predict the oil well production to change of production trend during economic limit implication；Contain when aqueous higher than economic limit
After water, oil well individual well day oil productive capacity value is 0, as shown in Figure 3.
In step 105, judge whether measure is effective.The oily ability of measure individual well actual after implementing day is more than economic limit
Oil production, and more than the oily ability of individual well day predicted in the case of oil well not implementing measure, it is used as the effective Rule of judgment of measure.
In one embodiment, economic limit implication when oil well AA implements individual well daily fluid production rate 240t/d, 70 $ after extract measure/bbl is
98.9%, economic limit oil production is 2.6t/d, and the 46th monthly output of the well drops to economic limit.Actual development after contrast measure
Data are not with implementing stimulation production predicted value, it is found that actual production, which is more than, after measure does not implement stimulation production predicted value, the extract
Measure is effective, as shown in Figure 4.
In step 107, the measure term of validity of oil well is calculated.To measure failure from implementing from measure, undergone
Time is the measure term of validity of oil well.In one embodiment, measure is come into effect within 14th month, measure in the 46th month is failed,
The measure term of validity of the oil well is 33 months.
In step 109, the oil increment from stimulation of oil well is calculated.In the measure term of validity, actually add up oil-producing after implementing measure
The oil increment from stimulation of the difference, as oil well of accumulative oil-producing is predicted with not implementing measure.In one embodiment, in the measure term of validity
It is 4766t actually to add up oil-producing after implementing measure, not implementing measure prediction accumulative oil-producing 258t, both difference 4508t, is
The oil increment from stimulation of oil well.
Claims (2)
1. oil well measure effect evaluation method, it is characterised in that the oil well measure effect evaluation method includes：
Step 1, oil well economic limit oil production is determined；
Step 2, the change of production trend of prediction oil well not in the case of implementing measure；
Step 3, judge whether measure is effective；
Step 4, the measure term of validity of oil well is calculated；And
Step 5, the oil increment from stimulation of oil well is calculated；
In step 1, according to Profit and loss balance principle, individual well daily fluid production rate and economic limit implication Core analysis are set up, it is determined that oily
Economic limit oil production of the well under certain oil price, certain individual well daily fluid production rate；Economic limit implication refers to work as oil field or oil well
Certain phase is developed, its is aqueous when reaching a certain numerical value, and the after-tax output value of well oil output is equal to running cost then, if
It is aqueous to be further continued for rise, not only without profit, loss is there is also, now the aqueous economic limit that is referred to as of oil field or oil well contains
Water；
In step 3, measure individual well actual after implementing day oil productive capacity is more than economic limit oil production, and unreal more than oil well
The individual well day oil productive capacity predicted in the case of measure is applied, the effective Rule of judgment of measure is used as；
In step 4, to measure failure from implementing from measure, the time undergone is the measure term of validity of oil well；
In steps of 5, the difference of oil-producing and the accumulative oil-producing of not implementing measure prediction is actually added up in the measure term of validity, after implementing measure
Value, the as oil increment from stimulation of oil well.
2. oil well measure effect evaluation method according to claim 1, it is characterised in that in step 2, real according to oil well
The exploitation rule before measure is applied, predicts the oil well production to change of production trend during economic limit implication；When aqueous higher than warp
Help after ultimate water content, oil well individual well day oil productive capacity value is 0.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109816148A (en) * | 2018-12-27 | 2019-05-28 | 成都北方石油勘探开发技术有限公司 | A kind of water controlled field development project discrete optimizing method |
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| CN106761718A (en) * | 2015-11-24 | 2017-05-31 | 中国石油化工股份有限公司 | Determine that mid-deep strata oil reservoir employs the new method of thickness limit |
| CN107292409A (en) * | 2016-03-30 | 2017-10-24 | 中国石油化工股份有限公司 | Extension well economic life time, which is helped, stops stimulation effect prediction method |
| CN107657338A (en) * | 2017-09-18 | 2018-02-02 | 中国石油化工股份有限公司 | The horizontal lower change of production Forecasting Methodology of different liquid measures |
| CN110894783B (en) * | 2018-09-13 | 2022-03-01 | 中国石油天然气股份有限公司 | Method for calculating validity period of oil-gas well production increasing measures |
| CN110284860B (en) * | 2019-07-19 | 2021-07-06 | 中国石油化工股份有限公司 | Interactive artificial dip angle CO is adopted to cubic thick-layer sandstone oil reservoir notes2Oil displacement method |
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