CN105006113A - Ultra-high-water-content oil field exploitation early-warning method - Google Patents
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Abstract
The invention provides an ultra-high-water-content oil field exploitation early-warning method. The method comprises: step 1, screening indexes affecting production decline in at a relatively large degree and taking the indexes as early-warning indexes according to analysis of influence factors consisting of the yield; step 2, establishing an early-warning index standard, determining an abnormal fluctuation range of the indexes with consideration of influence of change of the early-warning indexes on the yield, and taking a dividing value of normal fluctuation and abnormal fluctuation as an early warning threshold value; and step 3, analyzing influence of the early-warning indexes on an oil field development yield through mine field statistics and theory calculation, and determining different syntagmatic relations of early-warning indexes with three early-warning levels of red, yellow, and green by utilizing matching relations among the indexes. By using the method, early-warning of a development condition of an old ultra-high-water-content oil field well in the next year can be realized through the matching relations among the early-warning indexes.
Description
Technical field
The present invention relates to oil-field development technical field, particularly relate to a kind of ultra-high water-containing oil-field development method for early warning.
Background technology
Arrears alert theory technique functions comes from economic development, all has application at present at the industry-by-industry of economy, national defence, agricultural etc.Ultra-high water-containing is developed oil fields, oil-field development is subject to the many factors impacts such as policy, input, development effectiveness change, easily there is large fluctuation in output, it is passive to bring whole field output operation, carries out anticipation in advance just seem especially important to oil-field development situation.The current analysis for ultra-high water-containing oil-field development situation is all the qualitative analysis in the situation to current present situation and generation, does not have ripe method to realize the various early warning that may occur situation in oil field.We have invented a kind of new ultra-high water-containing oil-field development method for early warning for this reason, solve above technical matters.
Summary of the invention
The object of this invention is to provide and be a kind ofly mainly used in ultra-high water-containing oil-field development method for early warning when fluctuation appears in ultra-high water-containing development late stage field output, oil-field development situation being carried out to the situation of anticipation.
Object of the present invention realizes by following technical measures: ultra-high water-containing oil-field development method for early warning, this ultra-high water-containing oil-field development method for early warning comprises: step 1, start with from the analysis of Influential Factors of yield forming, screen and larger index is affected as warning index to production rate decline; Step 2, sets up warning index standard, considers the influence degree of warning index change to output, the scope of the unusual fluctuations of agriculture products, and the cut off value of normal fluctuation and unusual fluctuations is as the threshold values of early warning; And step 3, added up and theory calculate by mining site, analyze the degree of warning index change to oil-field development yield effect, utilize the matching relationship between index, determine the different syntagmatic of the warning index of red, yellow, and green three kinds of warning levels.
Object of the present invention also realizes by following technical measures:
In step 1, warning index comprises yield forming index, stable yields base values, water status index.
In step 1, what reflect yield forming index be the efficient and strengthening time measure ratio of new well production rate ratio, oil increment from stimulation ratio, measure and measurement shoutage; The index of reflection stable yields basal status is voidage replacement ratio, well drives a well number and working fluid level; Reflect that the index of moisture changing condition is water_bearing escalating rate.
In step 3, as when yield forming situation and water filling, water status are respectively red early warning, total early warning result is red; When yield forming early warning result be yellow early warning, water filling and water status early warning result be red early warning time, total early warning result is red; When yield forming be green, water filling and water status for time red, total early warning result be yellow.
In step 3, for yield forming red early warning, the first situation is when the increase of n-2 new well ratio, the new well ratio of n-1 decline, n-1 measure ratio increases, simultaneously n-1 strengthening property measure ratio increases, total measure efficient decline time, n-1 Developing status worsens, and the old well production rate of 1 year forms red early warning; The second situation is when the decline of n-2 new well ratio, the new well ratio of n-1 decline, n-1 measure ratio increases, simultaneously n-1 strengthening property measure ratio increases, total measure efficient declines time, n-1 Developing status worsens, the old well production rate formation red early warning of 1 year; The third situation is when the increase of n-2 new well ratio, the new well ratio of n-1 decline, n-1 measure ratio declines, simultaneously n-1 strengthening property measure ratio increases, total measure efficient declines time, n-1 Developing status worsens, the old well production rate formation red early warning of 1 year.
In step 3, for the yellow early warning of yield forming, the first situation is when the increase of n-2 new well ratio, the new well ratio of n-1 decline, n-1 measure ratio increases, simultaneously n-1 strengthening property measure ratio increase or total measure efficient decline time, it is large that difficulty taken over by the new well of (n-1)th year, it is main by measure is produced or stable yields, but measure is taken over space and is reduced, but is also less than situation about not taking over completely by measure, and the n-th annual production forms yellow early warning; If (n-1)th year measurement shoutage exists abnormal bigger than normal when yellow early warning, early warning result will transfer redness to; The second situation is when the decline of n-2 new well ratio, the new well ratio of n-1 decline, n-1 measure ratio increases, simultaneously n-1 strengthening property measure ratio increase or total measure efficient decline time, it is large that difficulty taken over by the new well of (n-1)th year, it is main by measure is produced or stable yields, but measure is taken over space and is reduced, but is also less than situation about not taking over completely by measure, and the n-th annual production forms yellow early warning; If (n-1)th year measurement shoutage exists abnormal bigger than normal when yellow early warning, early warning result will transfer redness to; The third situation is when the increase of n-2 new well ratio, the new well ratio of n-1 increase, n-1 measure ratio declines, simultaneously n-1 strengthening property measure ratio increase or total measure efficient decline time, (n-1)th annual production is mainly by measure is produced or stable yields, but measure is taken over space and is reduced, but be also less than situation about not taking over completely by measure, the n-th annual production forms yellow early warning; 4th kind of situation is when the decline of n-2 new well ratio, the new well ratio of n-1 increase, n-1 measure ratio declines, simultaneously n-1 strengthening property measure ratio increase or total measure efficient decline time, (n-1)th annual production is mainly by measure is produced or stable yields, but measure is taken over space and is reduced, but be also less than situation about not taking over completely by measure, the n-th annual production forms yellow early warning.
In step 3, removing red early warning and yellow early warning 7 kinds combination, other indicator combination represent the n-th old well production rate and are configured to green.
In step 3, for water filling and water status early warning, when voidage replacement ratio declines or water_bearing escalating rate rising, the number that drives a well reduces or working fluid level declines, and water filling and water status are red early warning; Voidage replacement ratio or water_bearing escalating rate exception or the well number that drives a well reduces or working fluid level declines, and wherein 2 Indexes Abnormalities, be yellow early warning, other are combined as green.
Ultra-high water-containing oil-field development method for early warning in the present invention, be mainly used in the situation of when fluctuation appears in ultra-high water-containing development late stage field output, oil-field development situation being carried out to anticipation, the early warning to next year ultra-high water-containing oilfield old well Developing status can be realized by the various matching relationships between warning index.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of a specific embodiment of ultra-high water-containing oil-field development method for early warning of the present invention;
Fig. 2 is first class index early warning pie graph of the present invention;
Fig. 3 is yield forming red early warning indicator combination figure of the present invention;
Fig. 4 is the yellow warning index constitutional diagram of yield forming of the present invention;
Fig. 5 is water filling of the present invention and water status warning index constitutional diagram.
Embodiment
For making above and other object of the present invention, feature and advantage can become apparent, cited below particularly go out preferred embodiment, and coordinate institute's accompanying drawings, be described in detail below.
As shown in Figure 1, Fig. 1 is the process flow diagram of a specific embodiment of ultra-high water-containing oil-field development method for early warning of the present invention.
In step 101, determine ultra-high water-containing oil field warning index, mainly start with from the analysis of Influential Factors of yield forming, screen the index larger on production rate decline impact, as warning index.In order to make early warning system simple to operate, farthest reduce warning index, warning index is divided into first class index: yield forming index, stable yields base values, water status index.Two-level index is subdivided into again: reflection yield forming index is mainly new well production rate ratio, oil increment from stimulation ratio, measure is efficient and strengthen lower measure ratio and measurement shoutage below first class index; The index of reflection stable yields basal status is mainly voidage replacement ratio, well drives a well number and working fluid level; Reflect that the index of moisture changing condition is mainly water_bearing escalating rate.Flow process enters into step 102.
In step 102, be set up warning index standard.The influence degree of main consideration warning index change to output, the scope of the unusual fluctuations of agriculture products, the cut off value of normal fluctuation and unusual fluctuations is as the threshold values of early warning.Flow process enters into step 103.
In step 103, be determine to develop method for early warning.Added up and theory calculate by a large amount of mining site, analyze the degree of warning index change to oil-field development yield effect, utilize the matching relationship between index, determine the different syntagmatic of the warning index of red, yellow, and green three kinds of warning levels.
First be the combination early warning between first class index:
Mainly be divided into nine kinds of situations, see accompanying drawing 2, as when yield forming situation and water filling, water status are respectively red early warning, total early warning result is red; When yield forming early warning result be yellow early warning, water filling and water status early warning result be red early warning time, total early warning result is red; When yield forming be green, water filling and water status for time red, total early warning result be yellow.
The judgement of first class index warning level in fact:
Yield forming red early warning: for yield forming red early warning, the first situation is when the increase of n-2 new well ratio, the new well ratio of n-1 decline, n-1 measure ratio increases, simultaneously n-1 strengthening property measure ratio increases, total measure efficient decline time, n-1 Developing status worsens, and the old well production rate of 1 year forms red early warning; The second situation is when the decline of n-2 new well ratio, the new well ratio of n-1 decline, n-1 measure ratio increases, simultaneously n-1 strengthening property measure ratio increases, total measure efficient declines time, n-1 Developing status worsens, the old well production rate formation red early warning of 1 year; The third situation is when the increase of n-2 new well ratio, the new well ratio of n-1 decline, n-1 measure ratio declines, simultaneously n-1 strengthening property measure ratio increases, total measure efficient declines time, n-1 Developing status worsens, the old well production rate formation red early warning of 1 year.Concrete condition is shown in accompanying drawing 3.
The yellow early warning of yield forming: for the yellow early warning of yield forming, the first situation is when the increase of n-2 new well ratio, the new well ratio of n-1 decline, n-1 measure ratio increases, simultaneously n-1 strengthening property measure ratio increase or total measure efficient decline time, the new well of (n-1)th year takes over difficulty greatly, main by measure is produced or stable yields, but space reduction is taken in measure, but be also less than situation about not taking over completely by measure, the n-th annual production forms yellow early warning; If (n-1)th year measurement shoutage exists abnormal bigger than normal when yellow early warning, early warning result will transfer redness to; The second situation is when the decline of n-2 new well ratio, the new well ratio of n-1 decline, n-1 measure ratio increases, simultaneously n-1 strengthening property measure ratio increase or total measure efficient decline time, it is large that difficulty taken over by the new well of (n-1)th year, it is main by measure is produced or stable yields, but measure is taken over space and is reduced, but is also less than situation about not taking over completely by measure, and the n-th annual production forms yellow early warning; If (n-1)th year measurement shoutage exists abnormal bigger than normal when yellow early warning, early warning result will transfer redness to; The third situation is when the increase of n-2 new well ratio, the new well ratio of n-1 increase, n-1 measure ratio declines, simultaneously n-1 strengthening property measure ratio increase or total measure efficient decline time, (n-1)th annual production is mainly by measure is produced or stable yields, but measure is taken over space and is reduced, but be also less than situation about not taking over completely by measure, the n-th annual production forms yellow early warning; 4th kind of situation is when the decline of n-2 new well ratio, the new well ratio of n-1 increase, n-1 measure ratio declines, simultaneously n-1 strengthening property measure ratio increase or total measure efficient decline time, (n-1)th annual production is mainly by measure is produced or stable yields, but measure is taken over space and is reduced, but be also less than situation about not taking over completely by measure, the n-th annual production forms yellow early warning.Concrete condition is shown in accompanying drawing 4.If what need remarks to illustrate is that (n-1)th year measurement shoutage exists abnormal bigger than normal when yellow early warning, early warning result will transfer redness to.
Removing red early warning and yellow early warning 7 kinds combination, other indicator combination represent the n-th old well production rate and are configured to green.
Water filling and water status early warning: when voidage replacement ratio declines or water_bearing escalating rate rising, the number that drives a well reduces or working fluid level declines, and water filling and water status are red early warning; Voidage replacement ratio or water_bearing escalating rate exception or the well number that drives a well reduces or working fluid level declines, and wherein 2 Indexes Abnormalities, be yellow early warning, other are combined as green.See accompanying drawing 5.Flow process terminates.
In an application specific embodiment of the present invention, the end of the year in 2013, early warning is carried out to A oil recovery factory 2014 old well development situation: A oil recovery factory year in 2012,2013 new well production rate continues ratio and declines, within 2013, stimulation ratio increases, within 2013 simultaneously, strengthening property measure ratio increases, the efficient decline of measure, new well production rate ratio, stimulation production ratio increasing degree in 2013 exceed early warning value (standard of new well production rate ratio, stimulation production ratio) simultaneously, judge that 2014 of A oil recovery factory old well production rates are configured to red early warning; A oil recovery factory working fluid level in 2013 declines simultaneously, and moisture rising, water filling and water status are also red early warning, the old well development trend red early warning in comprehensive descision A oil recovery factory 2014.If A oil recovery factory Xin Jing, measure workload deficiency in 2014, will face the situation of production declining in 2014.
Claims (8)
1. ultra-high water-containing oil-field development method for early warning, is characterized in that, this ultra-high water-containing oil-field development method for early warning comprises:
Step 1, starts with from the analysis of Influential Factors of yield forming, screens and affects larger index as warning index to production rate decline;
Step 2, sets up warning index standard, considers the influence degree of warning index change to output, the scope of the unusual fluctuations of agriculture products, and the cut off value of normal fluctuation and unusual fluctuations is as the threshold values of early warning; And
Step 3, is added up and theory calculate by mining site, analyzes the degree of warning index change to oil-field development yield effect, utilizes the matching relationship between index, determine the different syntagmatic of the warning index of red, yellow, and green three kinds of warning levels.
2. ultra-high water-containing oil-field development method for early warning according to claim 1, is characterized in that, in step 1, warning index comprises yield forming index, stable yields base values, water status index.
3. ultra-high water-containing oil-field development method for early warning according to claim 2, is characterized in that, in step 1, reflection yield forming index be the efficient and strengthening time measure ratio of new well production rate ratio, oil increment from stimulation ratio, measure and measurement shoutage; The index of reflection stable yields basal status is voidage replacement ratio, well drives a well number and working fluid level; Reflect that the index of moisture changing condition is water_bearing escalating rate.
4. ultra-high water-containing oil-field development method for early warning according to claim 2, is characterized in that, in step 3, as when yield forming situation and water filling, water status are respectively red early warning, total early warning result is red; When yield forming early warning result be yellow early warning, water filling and water status early warning result be red early warning time, total early warning result is red; When yield forming be green, water filling and water status for time red, total early warning result be yellow.
5. ultra-high water-containing oil-field development method for early warning according to claim 4, it is characterized in that, in step 3, for yield forming red early warning, the first situation be when n-2 new well ratio increase, the new well ratio of n-1 declines, n-1 measure ratio increases, the property measure of n-1 strengthening simultaneously ratio increases, total measure efficient decline time, n-1 Developing status worsens, and the old well production rate of 1 year forms red early warning; The second situation is when the decline of n-2 new well ratio, the new well ratio of n-1 decline, n-1 measure ratio increases, simultaneously n-1 strengthening property measure ratio increases, total measure efficient declines time, n-1 Developing status worsens, the old well production rate formation red early warning of 1 year; The third situation is when the increase of n-2 new well ratio, the new well ratio of n-1 decline, n-1 measure ratio declines, simultaneously n-1 strengthening property measure ratio increases, total measure efficient declines time, n-1 Developing status worsens, the old well production rate formation red early warning of 1 year.
6. ultra-high water-containing oil-field development method for early warning according to claim 4, it is characterized in that, in step 3, for the yellow early warning of yield forming, the first situation is when the increase of n-2 new well ratio, the new well ratio of n-1 decline, n-1 measure ratio increases, simultaneously n-1 strengthening property measure ratio increase or total measure efficient decline time, it is large that difficulty taken over by the new well of (n-1)th year, it is main by measure is produced or stable yields, but measure is taken over space and is reduced, but is also less than situation about not taking over completely by measure, and the n-th annual production forms yellow early warning; If (n-1)th year measurement shoutage exists abnormal bigger than normal when yellow early warning, early warning result will transfer redness to; The second situation is when the decline of n-2 new well ratio, the new well ratio of n-1 decline, n-1 measure ratio increases, simultaneously n-1 strengthening property measure ratio increase or total measure efficient decline time, it is large that difficulty taken over by the new well of (n-1)th year, it is main by measure is produced or stable yields, but measure is taken over space and is reduced, but is also less than situation about not taking over completely by measure, and the n-th annual production forms yellow early warning; If (n-1)th year measurement shoutage exists abnormal bigger than normal when yellow early warning, early warning result will transfer redness to; The third situation is when the increase of n-2 new well ratio, the new well ratio of n-1 increase, n-1 measure ratio declines, simultaneously n-1 strengthening property measure ratio increase or total measure efficient decline time, (n-1)th annual production is mainly by measure is produced or stable yields, but measure is taken over space and is reduced, but be also less than situation about not taking over completely by measure, the n-th annual production forms yellow early warning; 4th kind of situation is when the decline of n-2 new well ratio, the new well ratio of n-1 increase, n-1 measure ratio declines, simultaneously n-1 strengthening property measure ratio increase or total measure efficient decline time, (n-1)th annual production is mainly by measure is produced or stable yields, but measure is taken over space and is reduced, but be also less than situation about not taking over completely by measure, the n-th annual production forms yellow early warning.
7. ultra-high water-containing oil-field development method for early warning according to claim 4, is characterized in that, in step 3, removing red early warning and yellow early warning 7 kinds combination, other indicator combination represent the n-th old well production rate and are configured to green.
8. ultra-high water-containing oil-field development method for early warning according to claim 4, is characterized in that, in step 3, for water filling and water status early warning, when voidage replacement ratio declines or water_bearing escalating rate rising, the number that drives a well reduces or working fluid level declines, and water filling and water status are red early warning; Voidage replacement ratio or water_bearing escalating rate exception or the well number that drives a well reduces or working fluid level declines, and wherein 2 Indexes Abnormalities, be yellow early warning, other are combined as green.
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| CN106408138A (en) * | 2016-11-24 | 2017-02-15 | 成都北方石油勘探开发技术有限公司 | Oil well short-term production index abnormity early warning method |
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