CN1243959A - Isotopic profile well-logging method by water-absorbing - Google Patents
Isotopic profile well-logging method by water-absorbing Download PDFInfo
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Abstract
An isotopic well-logging method with water-sucking profile can measure the highest peak value of curve when isotope just comes into high water-absorption stratus. A simple calculation method is used to correctly find out water-sucking profile. Its advantages include no influence from big hole and pollution, high correctness and accuracy, and simple operation.
Description
The invention belongs to technical field of radioactive measurement for wells, particularly a kind of isotopic profile well-logging method by water-absorbing.
Present isotope injection profile well logging construction technology: survey a gamma ray curve earlier---be the baseline of isotope stable state curve.Then downhole cartridge is mentioned more than the perforation interval, discharged isotope, the isotope particle is written into the stratum by water filling, when in well, not having movable isotope, isotopic curves amplitude on each water accepting layer basicly stable, survey two isotope stable state curves, unanimity is guaranteed in verification mutually.Curve interpretation is: an isotope stable state curve and gamma ray curve is superimposed, and the area of the amplitude difference of the master curve of formation is the intake profile area of this layer.The ratio of the intake profile area of each water accepting layer of same well is the relative intake profile of this well.But entered high water accepting layer depths for macropore well or pickup well overwhelming majority isotopes, make downhole cartridge not detect or the curve that measures on the low side.Simultaneously, there are the isotope pickup in pairing sleeve pipe of water accepting layer or oil pipe, also make the water accepting layer border be difficult for differentiating, and can't accurately calculate suction area (as Fig. 1).
The object of the present invention is to provide a kind of isotopic profile well-logging method by water-absorbing, can measure the curve peak-peak of isotope when just having advanced high water accepting layer, only use simple computing method, can accurately calculate intake profile, elimination makes the influence that isotopic curves does not detect or pickup brought because of macropore.
The object of the present invention is achieved like this, in order accurately to measure the high-amplitude of high water accepting layer isotopic curves in macropore well or the pickup well, adopts the method for surveying many performance graphs, and construction technology is as follows:
1, measures gamma ray curve routinely;
2, water injection well was by fluence water filling in normal day, and downhole cartridge is above perforation interval, and input log heading data discharge isotope;
3, survey down for the first time: catch up with isotope fast with well logger, have the heels of isotope and stop before arriving perforation interval and survey, when first batch of isotope arrived well logger, the start time drove well logging;
4, survey for the second time down: when amplitude maximum or particle is the most concentrated, area is maximum bulk isotope during by downhole cartridge, stand-by time drives well logging, begins to survey down, and downhole cartridge is followed the tracks of at the isotopic afterbody of bulk, and remains to the shaft bottom always;
5, survey on the first time: after measuring the shaft bottom down, go up fast at once and survey, beginning all curves from this all takes at the uniform velocity to measure, measure more than the perforation interval, and will go up for the first time and survey curve and survey curve ratio down for the second time, find pervious course upper curve amplitude that obvious reduction is arranged, may be the interval of " high water accepting layer ";
6, to " high water accepting layer ", be repeatedly go up survey, survey down each twice, measure more than the perforation interval from the shaft bottom with same speed again, measure many complete performance graphs;
7, measure two complete stable state curves at last according to a conventional method;
8, to the explanation of above-mentioned logging trace, calculate with the method for calculating intake profile
Relative intake profile.
The present invention is by adopting this isotopic profile well-logging method by water-absorbing, the accuracy and the precision of isotope injection profile logging trace are improved greatly, especially the well that has high water accepting layer and " pickup layer ", eliminated the influence that they cause, its construction technology is simple, easy operating is particularly suitable for field popularization application.
Fig. 1 records " water uptake section well logging result map " with present logging method.
Fig. 2 is a dynamic logging curve composite diagram.
The present invention is further described below in conjunction with accompanying drawing.
Treat separate injection well and commingled water injection borehole logging tool method basically identical, its method is as follows:
1, measures gamma ray curve routinely;
2, water injection well is by fluence water filling in normal day, downhole cartridge above perforation interval 100 meters to 200 meters, and input log heading data discharge isotope;
3, survey down for the first time: catch up with isotope fast with well logger, have the heels of isotope before 50 meters and stop more than arriving perforation interval and survey, when first batch of isotope arrived downhole cartridge, the start time drove well logging;
4, survey for the second time down: when amplitude maximum or particle is the most concentrated, area is maximum bulk isotope during by downhole cartridge, stand-by time drives well logging, begins to survey down, and downhole cartridge is followed the tracks of at the isotopic afterbody of bulk, and remains to the shaft bottom always;
5, survey on the first time: after measuring the shaft bottom down, go up fast at once and survey, begin all curves from this all to take at the uniform velocity to measure, measure more than the perforation interval, and will go up for the first time and survey curve and survey curve ratio down for the second time, find pervious course upper curve amplitude that obvious reduction is arranged, may be " high water accepting layer ";
6, several " high water accepting layers " will be repeatedly gone up survey, survey down each twice, measure more than the perforation interval with testing the speed equally again from the shaft bottom, measure many complete performance graphs;
7, measure two complete stable state curves at last according to a conventional method;
8, figure two is gloss oil pipe wells, and the performance graph that records by above-mentioned logging method, and is as follows to curve interpretation: (1), hole structure: measuring well section 1679-1836 rice, perforated interval 1724-1820 rice.Hydraucone is in the perforation interval bottom, and isotope is to advance to the zone of interest of top from the shaft bottom.(2), the differentiation of water accepting layer: the method for selecting performance graph be certain one deck potential drop low the fastest, amplitude is the highest, layering one-Q the most clearly
n, with this curve Q
nDeduct adjacent thereafter going up and survey performance graph Q
N+1, i.e. Q
n-Q
N+1=S (S is certain one deck intake profile), S＞0 is high water accepting layer, S＜0 is low water accepting layer or " pickup layer "; Q1, Q2 survey performance graph on article one, the second, and Q3 is article one stable state curve.Through judging: get Qn=Q1, Qn+1=Q2,26 layers of bottom (26 times) are high water accepting layer; 27 layers is high water accepting layer; 28 layers is " macropore "; 26 layers of top (on 26) are low water accepting layer; 24 layers are low water accepting layer; The HB layer is the pickup layer.(3), the differentiation and the processing of pickup layer: through judging that the HB layer is the sleeve pipe pickup, it causes owing to there is water accepting layer (24 layers) in the downstream, so will convert this pickup amplitude area on each layer by the suction relation of each layer of downstream.24 layers, HB pickup layer, 26 upper stratas, these three layers all are (Q1-Q2)＜0, that is to say that isotope is also unstable in well during surveying these two curves, also have interlayer to move, have only 26 lower floors unstable all over seeing whole well, its feature is as follows: the isotope amplitude boundaries that really enters in the layer is very precipitous, and peak value summit and bottom layer border are straight line, as 26 times " dotted line DN in the figure.(4), calculate relative intake profile, it has two kinds of computing method: first method: be that end product with the dynamic calibration area calculates relative intake profile (being B kind method), 1., dynamic difference area computation process is as follows:, be exactly result's (dash area area) of (Q1-Q2).2., dynamic calibration area, pickup layer (HB) is on average converted on each water accepting layer of downstream, the water accepting layer total area of pickup is cut the area (under the situation that the plain interlayer of other place's No Parity moves in well) that downstream layer increases, obtain clean difference (Q1-Q2) area (promptly really entering the deep isotope in stratum) of this layer.3., directly calculate the relative intake profile (%) of whole well with result 2..Second method: calculate relative intake profile (being A kind method) with the stable state area, calculate the maximum suction area of each water accepting layer exactly, 1., determine that each water accepting layer baseline, its baseline are the lines (straight dashed line AB, BC, Dq, qF) of each layer bottom step is as follows:.2., the calculating of maximum suction area, 24 layers of maximum area are that Q3 produces, add bottom pickup and the whole pickup layer of HB (being above all areas of baseline AB), 26 upper stratas are exactly maximal value when Q2,26 lower floors are net areas that the Q2 area adds Q1-Q2,27 layers with 26 times " a layer separatrix make vertical line Eq for mid point E, 27 layers of maximum area also are that Q1 produces; its value is 11.3, then 28 layers of S
28=11.3*n=26.0 is the clean difference area of the high water accepting layer of the n=/clean difference area of time high water accepting layer=2.3 wherein.3., calculate the relative intake profile long-pending (%) of whole well with result 2..
The meaning of two kinds of computing method: first kind is the variable quantity of each water accepting layer intake profile in the time interval that equates.Second kind is to ask relative intake profile with " stable state area ", and it and the time interval have nothing to do, and only asks " filter is long-pending fully ", but it and former logging method have difference in essence, its baseline is being not gamma ray curve, and it has eliminated the various pickups on oil, the sleeve pipe, and high water accepting layer is restored.Can both use " first method B " to most water injection wells and ask relative intake profile, the complicated well in only a few pickup serious layer position is just used " second method A ".
Fig. 1 is the stable state curve " emerging 230 intake profile result maps " of the same well that records with present technology, and it does not almost measure 28 floor height water accepting layers, do not lay down a definition, and Fig. 1 accounts for 34.6% of total suction with 28 layers of relative injectivity of B kind algorithm computation.Above-mentioned two kinds of computing method (A, B) individual layers (26 lower floor) maximum error is that the above-mentioned interpretation procedure of 8.3% explanation is correct, and it improves greatly than present logging method precision.
Claims (4)
1, a kind of isotopic profile well-logging method by water-absorbing, it is characterized in that: construction technology is as follows:
1., measure a gamma ray curve according to a conventional method;
2., water injection well is by fluence water filling in normal day, downhole cartridge is above perforation interval, input log heading data discharge the isotope particle that is contained in the downhole cartridge;
3., survey down for the first time: catch up with the isotope particle fast with downhole cartridge, have the heels of before arriving perforation interval, and stop surveying, when first batch of isotope arrived downhole cartridge, the start time drove well logging;
4., survey for the second time down: when amplitude maximum or particle is the most concentrated, area is maximum bulk isotope during by downhole cartridge, stand-by time drives well logging, begins to survey down, and downhole cartridge is followed the tracks of the afterbody at bulk isotope particle, and remains to the shaft bottom always;
5., survey on the first time: after measuring the shaft bottom down, go up fast at once and survey, beginning all curves from this all takes at the uniform velocity to measure, measure more than the perforation interval, and will go up for the first time and survey curve and survey curve ratio down for the second time, find pervious course upper curve amplitude that obvious reduction is arranged, may be the interval of " high water accepting layer ";
6., to several " high water accepting layers ", to go up repeatedly simultaneously survey, survey down each twice, measure more than the perforation interval with testing the speed equally again from the shaft bottom, measure many complete performance graphs;
7., measure two complete stable state curves at last according to a conventional method;
8., the explanation of above-mentioned logging trace is calculated relative intake profile with calculating the long-pending method of water-absorption surface;
2, according to claims 1 described a kind of isotopic profile well-logging method by water-absorbing, it is characterized in that: 8. step is to adopt performance graph calculating and explain relative intake profile.
1., the highest, the layering of the amplitude that is chosen on the high water accepting layer clearly two go up that to survey performance graphs synthetic, and calculated difference area;
2., differentiate and calculate the pickup area, the isotopic curves amplitude boundaries that really enters in the layer is very precipitous, peak of curve summit and bottom layer border are straight line;
3., the difference area is 1. proofreaied and correct, remove the pickup area, promptly get " dynamic calibration area ", method is: the pickup area on pickup layer or the water accepting layer is converted on each layer by the suction proportionate relationship of each layer of downstream;
4., the end product of " dynamic calibration area " calculates each layer intake profile (%) relatively in using 3..
3, a kind of isotope injection profile logging trace interpretation procedure according to claim 2 is characterized in that: 8. step is to adopt the stable state area to ask relative intake profile:
1., with the result after 1., 2., 3. the calculating in the right 2, obtain:
N=macropore layer dynamic calibration area/time high water accepting layer dynamic calibration area;
2., determine the baseline of performance graph, the stable state curve in water accepting layer two minimum points and performance graph on the line of corresponding two points, be exactly the baseline of performance graph;
3., calculate each layer maximum " stable state area ", be exactly the maximum suction area of each water accepting layer, be S=n* (inferior high water accepting layer maximum area) to the maximum area of the high water accepting layer of macropore;
4., with 1. calculating the relative intake profile of each layer (%) with 3. result.
4, a kind of isotopic profile well-logging method by water-absorbing according to claim 1 is characterized in that: 8. step is to adopt a kind of division methods of high and low water accepting layer:
With stable state curve and gamma ray curve school dark after, several performance graphs and a gamma ray curve are incorporated on the figure, the pervious course that reduces the variable quantity maximum with amplitude on one deck is high water accepting layer, selects on the high water accepting layer that amplitude is the highest, that is gone up and surveys curve---Q clearly in layering
n, with this curve Q
nDeduct adjacent thereafter going up and survey performance graph Q
N+1, i.e. Q
n-Q
N+1=S (S is certain one deck intake profile), then S＞0 is high water accepting layer, S＜0 is low water accepting layer or " pickup layer ".
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| CNB991130537A CN1154855C (en) | 1999-06-24 | 1999-06-24 | Isotopic profile well-logging method by water-absorbing |
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| CNB991130537A CN1154855C (en) | 1999-06-24 | 1999-06-24 | Isotopic profile well-logging method by water-absorbing |
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| CN1154855C CN1154855C (en) | 2004-06-23 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102094639A (en) * | 2009-12-14 | 2011-06-15 | 西安威尔罗根能源科技有限公司 | Method for correcting natural gamma ray spectral logging of barite mud well |
| CN102758612A (en) * | 2012-08-01 | 2012-10-31 | 张福连 | Multi-parameter layered testing method |
| CN105359144A (en) * | 2013-06-04 | 2016-02-24 | 谷歌公司 | Natural language search results for intent queries |
| CN106054254A (en) * | 2016-08-01 | 2016-10-26 | 中国石油天然气集团公司 | Well logging curve correction method and device |
| CN106150481A (en) * | 2015-04-01 | 2016-11-23 | 中国石油天然气股份有限公司 | Profile-log of water injection measuring method based on natural gamma baseline |
| CN110863807A (en) * | 2019-11-06 | 2020-03-06 | 中国石油天然气股份有限公司 | Method for judging water absorption condition of oil-water well |
-
1999
- 1999-06-24 CN CNB991130537A patent/CN1154855C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102094639A (en) * | 2009-12-14 | 2011-06-15 | 西安威尔罗根能源科技有限公司 | Method for correcting natural gamma ray spectral logging of barite mud well |
| CN102094639B (en) * | 2009-12-14 | 2013-12-04 | 西安威尔罗根能源科技有限公司 | Method for correcting natural gamma ray spectral logging of barite mud well |
| CN102758612A (en) * | 2012-08-01 | 2012-10-31 | 张福连 | Multi-parameter layered testing method |
| CN105359144A (en) * | 2013-06-04 | 2016-02-24 | 谷歌公司 | Natural language search results for intent queries |
| CN106150481A (en) * | 2015-04-01 | 2016-11-23 | 中国石油天然气股份有限公司 | Profile-log of water injection measuring method based on natural gamma baseline |
| CN106054254A (en) * | 2016-08-01 | 2016-10-26 | 中国石油天然气集团公司 | Well logging curve correction method and device |
| CN110863807A (en) * | 2019-11-06 | 2020-03-06 | 中国石油天然气股份有限公司 | Method for judging water absorption condition of oil-water well |
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|---|---|
| CN1154855C (en) | 2004-06-23 |
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