CN1094599C - Inter-well tracing determination technology using chemical tracer - Google Patents
Inter-well tracing determination technology using chemical tracer Download PDFInfo
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- CN1094599C CN1094599C CN 98114214 CN98114214A CN1094599C CN 1094599 C CN1094599 C CN 1094599C CN 98114214 CN98114214 CN 98114214 CN 98114214 A CN98114214 A CN 98114214A CN 1094599 C CN1094599 C CN 1094599C
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Abstract
The present invention relates to a technique for carrying out interwell tracing determination by chemical tracers in the development of oilfields, particularly to a chemical tracer monitoring technique which is used in tertiary oil production and achieves good effect with multiple field tests of eight years. A complete set of method for using the technique of monitoring chemical tracers with own characteristics is studied out on the basis of similar techniques at home and abroad. The developed tracers have the advantages of high biological stability and chemical stability. Concentration detection carried out by a flow injection analyzing method has the advantages of high speed, high sensitivity, good data reproduction and high accuracy.
Description
The present invention relates to utilize in the oil-field development chemical tracer to carry out the technology of tracer determination between well, the especially application in polymer flooding, alkali/polymer flooding and non-phase-mixing driving.
Between well the chemical tracing technology be development in recent years get up oil reservoir is carried out a new monitoring technology of fine description, present employed chemical tracer technology is because the sensitivity of its detection is low, poor reproducibility, cause Monitoring Data inaccurate, thereby cause oil reservoir is communicated with the understanding of degree and heterogeneous body mistake, influence the effect of oil-field development.
The object of the present invention is to provide a kind of chemical tracer inter-well test technology, use this technical method, the tracer agent of developing satisfies the needs of alkali/polymer flooding engineering and immiscible flood engineering.。Adopt flow injection analysis to carry out the detection of tracer agent output concentration, speed is fast, and is highly sensitive, and data reappearance is good, and accuracy improves greatly.Adopt analytical method that the tracer agent production curve is carried out The Fitting Calculation, can be familiar with the effect relationship that is subjected to of well pattern in conjunction with the oil reservoir dynamic and static data, displacement of reservoir oil liquid involve degree, oil reservoir in the plane and the nonuniformity vertically, alkali/polymer flooding and immiscible flood effect are carried out objective appraisal.
The object of the present invention is achieved like this:
1, in water injection well (or injecting well), injects chemical tracer;
2, in producing well, take a sample, after filtration, decolouring, make peace and quiet water sample, with the ion concentration of chemical tracer in the flow injection analysis analytic sample, the FIA technology fast, analysis speed can reach 50～120 samples/hour; Improved the sensitivity of spectrophotometric method, detected lower limit and reduce to 0.1mg/l by 1mg/l; Adopt auto injection, eliminated the manual operation error, favorable reproducibility, improved accuracy,, therefore avoided the volatilization of medicine and sample in pipeline because reaction is all carried out, reagent and amount of samples are all at micro updating, greatly reduce analysis cost, easy and simple to handle, saved a large amount of operations that moves liquid and cleaning glass apparatus, reduced consumption, alleviate analyst's labour intensity, solved the problem that the dynamic color reaction is faded easily, the problem of the unstable products that promptly develops the color; The research of FIA technology in the tracer agent monitoring is looked into newly through main office's information with application and shown: domestic and foreign literature there is no report.This method has realized analysis automated;
3, (there are several mouthfuls of wells to see tracer agent with some the tracer agent production curves that draw of the variation between very little concentration, several tracer agent production curves are just arranged), carry out The Fitting Calculation by several tracer agent output concentration values to actual measurement, can obtain the formation parameter of needs, be the thickness that tracer agent arrives Water Flooding Layer, permeability and duct radius, swept volume, understanding displacement of reservoir oil fluid is the speed and the direction of streamline in the plane, the fingering situation of connection degree and interflow between injection-production well, V-factor, the lorentz coefficient, the plane parameter of expression such as speed interlayer heterogeneity of advancing by leaps and bounds, thus alkali/polymer flooding and immiscible flood effect are carried out objective appraisal.
The invention provides a kind of chemical tracer monitoring technology,, obtained effect preferably through the site test more than 8 years.We are at home and abroad on the basis of similar technology, work out the using method that a whole set of has own characteristics chemical tracer monitoring technology, the tracer agent of developing, biological stability and chemical stability are good, adopt flow injection analysis to carry out the detection of the ion concentration of chemical tracer in the sample, have characteristics quick, accurate, highly sensitive, easy and simple to handle, reduced consumption, alleviated analyst's labour intensity, realized analysis automated.
Embodiment one:
1, the preparation implantation concentration is the chemical tracer sodium bromide solution of 600mg/L in the tracer agent Agitation Tank at non-phase-mixing driving engineering injecting station, is injected into high pressure pipe joint with micro pump, and high pressure pipe joint is injected into well head, injects well from well head.
2,, after filtration, decolouring, adopt the concentration of bromide ion in the flow injection spectrophotometric method test sample product at wellhead sampling.
3, monitoring result is carried out The Fitting Calculation with tracer agent production curve numerical analysis software, can calculate thickness, permeability, the duct radius of Water Flooding Layer, can calculate V-factor with this, the Lorentg coefficient, the individual layer parameters such as coefficient of advancing by leaps and bounds, also can calculate injection fluid flowing velocity in the plane, flow direction and swept volume from monitoring result.
Embodiment two:
When 1, in alkali/polymer engineering, having three mouthfuls of adjacent water injection wells (injecting well) to annotate tracer agent simultaneously, select 3 kinds of chemical tracers not of the same race for use, method for implanting adopts preparation at the scene and injects well head with injection pump, at emerging 1-6 well implantation concentration 5% sodium bromide 1t, at emerging inspection 1-06 well implantation concentration 8% ammonium thiocyanate 1.5t, at emerging more 1-2 well implantation concentration is 10% ammonium nitrate 2t, has annotated normal water filling behind the tracer agent.
2, to 3 mouthfuls of Jing Zhujijing at monitor well with one deck position, obtained sample all carries out 3 kinds of tracer concentration analyses, determines to be subjected to effect relationship between injection-production well with this.
But 3, monitoring result is carried out the flow tendency that the computational analysis quantitative description injects fluid, the nonuniformity of oil reservoir, and swept volume.
Embodiment three:
1, in polymer injection displacement of reservoir oil engineering, in the injecting well, inject first kind of tracer agent sodium nitrite 2t before the polymer injection, implantation concentration is 5%, in with a bite injecting well, inject second kind of tracer agent potassium iodide 0.3t after the polymer injection, implantation concentration is 200mg/L, adopts on the station preparation and injects well head with injection pump three.
2, the front and back secondary can obtain the two groups of tracer agent production curves in polymer injection front and back in the identical monitoring well pattern sampling and the output concentration of analysis tracer agent.
3, these two groups of tracer agent production curves are carried out The Fitting Calculation, calculate parameters such as two groups of flow tendency of describing to inject fluid, oil reservoir nonuniformity respectively, contrast the difference of two groups of parameters, estimate the effect of polymer flooding engineering.
Claims (1)
1. utilize chemical tracer to carry out the technical method of tracer determination between well in an oil-field development, it is characterized in that:
(1) in water injection well, injects chemical tracer; In producing well, take a sample, after filtration, decolouring, with the ion concentration of flow injection analysis analytical chemistry tracer agent; With the concentration tracer agent production curve that draws over time, carry out The Fitting Calculation by several tracer agent output concentration values to actual measurement, try to achieve the formation parameter that needs, promptly tracer agent is through the permeability and the thickness duct radius of Water Flooding Layer;
(2) at three sodium bromides of adopting preparation 600mg/L concentration of volume percent in the tracer agent Agitation Tank at injecting station, be injected into manifold with micro pump, high pressure pipe joint is injected into well head.At wellhead sampling, decolouring after filtration,, survey the weight percent concentration of bromide ion with flow injection analysis, monitoring result is carried out The Fitting Calculation with tracer agent production curve numerical analysis software, can calculate thickness, permeability, the duct radius of Water Flooding Layer, can calculate V-factor with this, the Lorentg coefficient, the individual layer parameters such as coefficient of advancing by leaps and bounds also can calculate from monitoring result and to inject fluid flowing velocity in the plane, flow direction and swept volume;
When (3) having three mouthfuls of adjacent water injection wells to annotate tracer agent simultaneously, select for use 3 kinds of chemical tracers to inject 5% sodium bromide 1t at the well head of emerging 1-6 well, well head at emerging inspection 1-06 well injects 8% ammonium thiocyanate 1.5t, annotates 10% nitric acid at emerging more 1-2 well, has annotated normally water filling behind the tracer agent; Take a sample in the supervision that may be communicated with 3 mouthfuls of well spacings, and carry out 3 kinds of tracer concentration analyses, determine to annotate the relation of being benefited of adopting with this; Monitoring result is carried out the flow tendency that fluid can be quantitatively injected in computational analysis, describe the nonuniformity of oil reservoir, and estimation and volume;
(4) in the tertiary oil recovery as the polymer injection displacement of reservoir oil, before polymer injection, annotate a tracer agent sodium nitrite 2t, implantation concentration 5%, notes are all adopted to join on the station three and are pumped into well head once as potassium iodide 0.3t concentration 10% again polymer injection after; The front and back secondary is in identical monitor well sample analysis tracer concentration.Quantitative Analysis goes out to describe flow tendency, the oil reservoir nonuniformity of injecting fluid, to this secondary difference, estimates the effect of tertiary oil recovery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98114214 CN1094599C (en) | 1998-08-03 | 1998-08-03 | Inter-well tracing determination technology using chemical tracer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98114214 CN1094599C (en) | 1998-08-03 | 1998-08-03 | Inter-well tracing determination technology using chemical tracer |
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| Publication Number | Publication Date |
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| CN1224848A CN1224848A (en) | 1999-08-04 |
| CN1094599C true CN1094599C (en) | 2002-11-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 98114214 Expired - Fee Related CN1094599C (en) | 1998-08-03 | 1998-08-03 | Inter-well tracing determination technology using chemical tracer |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1325942C (en) * | 2002-08-23 | 2007-07-11 | 中国原子能科学研究院 | Perturbation well-to-well tracing test method |
| US20110167896A1 (en) * | 2010-01-11 | 2011-07-14 | General Electric Company | Estimation of reservoir permeability |
| CN104915530B (en) * | 2014-03-10 | 2018-03-13 | 中国石油化工股份有限公司 | The method for building up of oil reservoir interwell communication relation |
| CN104453863A (en) * | 2014-11-14 | 2015-03-25 | 天津大港油田滨港集团博弘石油化工有限公司 | Sulfate tracer agent for tertiary oil recovery and preparation method of sulfate tracer agent |
| CN105672994A (en) * | 2015-12-29 | 2016-06-15 | 核工业北京化工冶金研究院 | Tracing method in in-situ uranium mining |
| CN106526701B (en) * | 2016-11-28 | 2019-03-26 | 河南心连心化肥有限公司 | Ammonium thiocyanate is as the adding set and method of urea for vehicle tracer and application |
| CN106980758B (en) * | 2017-03-17 | 2020-06-26 | 常州大学 | Rapid calculation method for flow field velocity of injection-production well pattern |
| CN110259426B (en) * | 2019-07-02 | 2021-12-07 | 捷贝通石油技术集团股份有限公司 | Method for evaluating pressure channeling degree between unconventional platform wells |
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1998
- 1998-08-03 CN CN 98114214 patent/CN1094599C/en not_active Expired - Fee Related
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