CN103321636A - Non-radioactive tracing flow logging method and flow based on pulse neutron technology - Google Patents
Non-radioactive tracing flow logging method and flow based on pulse neutron technology Download PDFInfo
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- CN103321636A CN103321636A CN2013102902918A CN201310290291A CN103321636A CN 103321636 A CN103321636 A CN 103321636A CN 2013102902918 A CN2013102902918 A CN 2013102902918A CN 201310290291 A CN201310290291 A CN 201310290291A CN 103321636 A CN103321636 A CN 103321636A
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- 238000000034 method Methods 0.000 title claims abstract description 47
- 239000000700 radioactive tracer Substances 0.000 claims abstract description 50
- 239000012530 fluid Substances 0.000 claims abstract description 24
- 238000001228 spectrum Methods 0.000 claims abstract description 12
- 229910052688 Gadolinium Inorganic materials 0.000 claims abstract description 11
- 150000001639 boron compounds Chemical class 0.000 claims abstract description 11
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 claims abstract description 11
- 230000008569 process Effects 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 238000001514 detection method Methods 0.000 claims description 23
- 238000009434 installation Methods 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 7
- 230000004044 response Effects 0.000 claims description 7
- 239000000725 suspension Substances 0.000 claims description 7
- 230000005251 gamma ray Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 11
- 238000002347 injection Methods 0.000 abstract description 10
- 239000007924 injection Substances 0.000 abstract description 10
- 239000000243 solution Substances 0.000 abstract description 10
- 238000005259 measurement Methods 0.000 abstract description 7
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 230000002285 radioactive effect Effects 0.000 abstract 3
- 239000000941 radioactive substance Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000002547 anomalous effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000000155 isotopic effect Effects 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000003904 radioactive pollution Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The invention relates to a non-radioactive tracing flow logging method and a non-radioactive tracing flow logging process based on a pulse neutron technology, which are used in an oil field production injection profile logging technology. The non-radioactive tracing flow logging method and the flow based on the pulse neutron technology adopt a high-heat neutron capture cross section and a non-radioactive substance gadolinium or boron compound solution as a tracer, measure a macroscopic capture cross section of fluid in a well by adopting a neutron life mode, namely, the tracer is bombarded by high-intensity pulse neutrons emitted by a pulse neutron generator, the tracer captures thermal neutrons, records thermal neutron time spectrum or thermal neutron counting rate of a fixed source distance detector by adopting different logging processes, and can calculate the flow rate of the fluid in the well and the use condition of a thin difference layer by analyzing logging data. The method has no radioactivity risk, meets the environmental protection requirement, has lower measurement lower limit, effectively solves the problem of low flow rate of the current stratified injection well and large monitoring error, and has wider field adaptability.
Description
Technical field
The present invention relates to a kind of on-radiation tracer flow survey method and flow process based on pulsed neutron technique used in the field produces injection profile logging technology.
Background technology
Along with deepening continuously of oil field development, environmental protection consciousness further improves, and what the flow monitoring of stratified injection well ran into is difficult increasing.In the existing injection profile logging technology, the radioisotope logging radioactive pollution has a big risk, and has the contamination problem, and unavoidably there are the radioactivity risk in simultaneously isotopic tracer transportation, keeping and use; The well logging of spike correlative flow has solved the contamination problem, still has the radioactivity risk; Oxygen activation logging radioactivity risk is little, but as flow＜10 m
3During/d, measure error is large.
Summary of the invention:
In order to address the above problem, the invention provides a kind of on-radiation tracer flow survey method and flow process based on pulsed neutron technique.The method and flow process are to utilize the pulsed neutron log method, adopt high capture cross-section material to carry out tracer flow survey as tracer, the advantage that possesses the tracer flow survey method, simultaneously "dead" risk, without stain in the well, measurement lower limit is lower, can solve the problem that the flow monitoring of present stratified injection well runs into.
Technical scheme of the present invention is: a kind of on-radiation tracer flow survey method and flow process based on pulsed neutron technique, implement the method instrument mainly by the liquid tracer release, the steady control circuit of accelerator for neutron production, minor diameter has the target pulsed neutron generator of one's own, short space gamma detection system, long space gamma detection system and Spectrum acquisition are analyzed transmission circuit and are formed, when instrument is gone into the well work, by the ground installation control instrument, it is the pulsed neutron of 14 MeV that the steady control circuit of accelerator for neutron production has target pulsed neutron generator emitted energy of one's own according to surface instruction control minor diameter, the flow through borehole fluid of short space gamma detection system and long space gamma detection system of neutron irradiation, the capture gamma ray of short space and long space detection system record neutron and borehole fluid reaction, Spectrum acquisition is analyzed transmission circuit the ground installation terminal is analyzed and transferred to the time spectrum of short space and the collection of long space detection system, and the Logging Software of ground installation terminal calculates the neutron-capture cross section data according to log response; And when above-mentioned minor diameter has target pulsed neutron generator given-ioff neutron of one's own, open the liquid tracer release, beginning is sprayed the nonradioactive tracer with high thermal-neutron capture cross-section in well, tracer enters in the well and forms suspension with borehole fluid, flow with borehole fluid, when the suspension of tracer and borehole fluid formation is flowed through short space and long space detection system, high capture cross-section value will appear in log response, by analyzing log data, can calculate the situation of employing of flow velocity and the thin poor layer of borehole fluid.
Above-mentioned nonradioactive tracer is gadolinium or boron compound solution.
The invention has the beneficial effects as follows: said method is to utilize the pulsed neutron log method, adopt high thermal-neutron capture cross-section material gadolinium or boron compound solution to carry out tracer flow survey as tracer, the advantage that possesses the tracer flow survey method, adopt simultaneously pulsed neutron technique, utilize gadolinium or boron compound solution as nonradioactive tracer, "dead" risk, satisfy environmental requirement, and measurement lower limit is lower, effectively solve the large problem of flow low monitoring error of present stratified injection well, have widely on-the-spot compliance.
Description of drawings
Fig. 1 is that main group in the used test instrument wanted the member schematic layout pattern;
Fig. 2 is measurement scheme schematic diagram of the present invention;
Fig. 3 is that thin poor layer is employed the condition monitoring flow chart.
1-liquid tracer release among the figure, the steady control circuit of 2-accelerator for neutron production, 3-has the target pulsed neutron generator of one's own, 4-short space gamma detection system, 5-long space gamma detection system, the 6-Spectrum acquisition is analyzed transmission circuit.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing:
By Fig. 1 Fig. 2 and shown in Figure 3, should be to adopt high thermal-neutron capture cross-section based on on-radiation tracer flow survey method and the flow process of pulsed neutron technique, cold material gadolinium or boron compound solution are made tracer, adopt the macroscopic capture cross-section of neutron lifetime mode measuring well inner fluid, namely utilize the high intensity pulses neutron bombardment borehole fluid of pulsed neutron generator emission, flow through tracer and the thermal neutron generation capture reaction of detector system, record is the thermal neutron time spectrum of spacing detector or the ANOMALOUS VARIATIONS peak value of thermal neutron counting rate fixedly, and employing correlative flow calculating method can realize the flow monitoring function.
Implement the instrument of said method mainly by liquid tracer release 1, the steady control circuit 2 of accelerator for neutron production, have target pulsed neutron generator 3 of one's own, short space gamma detection system 4, long space gamma detection system 5 and Spectrum acquisition are analyzed transmission circuit 6 and are formed, as shown in Figure 1, when instrument is gone into the well work, by the ground installation control instrument, it is the pulsed neutron of 14 MeV that the steady control circuit 2 of accelerator for neutron production has target pulsed neutron generator 3 emitted energies of one's own according to surface instruction control minor diameter, the flow through borehole fluid of short space gamma detection system 4 and long space gamma detection system 5 of neutron irradiation, short space and long space detection system (4,5) gamma ray of record neutron and borehole fluid reaction, Spectrum acquisition is analyzed 6 pairs of short spaces of transmission circuit and long space detection system (4,5) the ground installation terminal is analyzed and transferred to the time spectrum that gathers, and the Logging Software of ground installation terminal calculates the neutron-capture cross section data according to log response; When above-mentioned minor diameter has target pulsed neutron generator 3 given-ioff neutron of one's own, open liquid tracer release 1, beginning is sprayed nonradioactive tracer gadolinium or the boron compound solution with high thermal-neutron capture cross-section in well, tracer enters in the well and forms suspension with borehole fluid, flow with borehole fluid, the suspension that forms when tracer and borehole fluid flow through short space and long space detection system (4,5) time, high capture cross-section value will appear in log response, utilize correlative flow calculating method can obtain the situation of employing of flow velocity and the thin poor layer of borehole fluid.
Concrete flow monitoring method is shown in Fig. 2 (a, b), tracer with certain polymerism is discharged in oil pipe, form suspension with borehole fluid, tracer flows with borehole fluid, when it flows through eccentric injection mandrel, part tracer will flow in the oil jacket space by water nozzle, along with on the current direction or flow downward.Utilizing the pulsed neutron generator emitted energy after tracer discharges is the neutron of 14 MeV, flow media in the irradiation well, peak value appears in measurement parameter thermal neutron macroscopic capture cross-section when having the tracer gadolinium of high thermal-neutron capture cross-section or boron compound solution through probe, can try to achieve flow velocity and then the flow of medium in the well by calculating, thereby realize the monitoring function of flow.
Concrete computational process is as follows:
If the time difference between two peak values be (
t 2-
t 1), the distance, delta between the probe
LKnown, the migration velocity of tracer then
vFor:
v?=?Δ
L?/?(
t 2-
t 1)
The cross-sectional area in oil jacket space is
A, the discharge in oil jacket space herein then
QFor:
Q?=?
A?·?
v
Thin poor layer is employed condition monitoring
Utilize said method to carry out thin poor layer and employ condition monitoring, idiographic flow will have the tracer gadolinium of certain polymerism or boron compound solution and discharge in oil pipe afterwards with media flow in the well as shown in Figure 3, enter the most at last each water filling layer position; Utilize on-radiation tracer flow survey instrument continuously or one-point measurement inject before and after the neutron macroscopic capture cross-section of near wellbore formation, just can judge whether thin poor layer absorb water; The response of the sub-macroscopic capture cross-section of recycling laboratory experiment scale instrument centering, set up log interpretation model, carry out match with injecting the well logging corresponding data that Calibration Experiment obtains in neutron-capture cross section data that fore-and-aft survey obtains and the instrument room, namely can estimate the relative injection rate of each water entry.
Said method is to utilize the pulsed neutron log method, adopt high thermal-neutron capture cross-section material gadolinium or boron compound solution to carry out tracer flow survey as tracer, the advantage that possesses the tracer flow survey method, adopt simultaneously pulsed neutron technique, utilize gadolinium or boron compound solution as nonradioactive tracer, "dead" risk, namely satisfy environmental requirement, and measurement lower limit is lower, effectively solve the large problem of flow low monitoring error of present stratified injection well, have widely on-the-spot compliance.
Claims (2)
1. on-radiation tracer flow survey method and flow process based on a pulsed neutron technique, it is characterized in that: implement the instrument of the method mainly by liquid tracer release (1), the steady control circuit of accelerator for neutron production (2), have target pulsed neutron generator (3) of one's own, short space gamma detection system (4), long space gamma detection system (5) and Spectrum acquisition are analyzed transmission circuit (6) and are formed, when instrument is gone into the well work, by the ground installation control instrument, it is the pulsed neutron of 14 MeV that the steady control circuit of accelerator for neutron production (2) has target pulsed neutron generator (3) emitted energy of one's own according to surface instruction control minor diameter, the flow through borehole fluid of short space gamma detection system (4) and long space gamma detection system (5) of neutron irradiation, short space and long space detection system (4,5) gamma ray of record neutron and borehole fluid reaction, Spectrum acquisition is analyzed transmission circuit (6) to short space and long space detection system (4,5) the ground installation terminal is analyzed and transferred to the time spectrum that gathers, and the Logging Software of ground installation terminal calculates the neutron-capture cross section data according to log response; When above-mentioned minor diameter has target pulsed neutron generator (3) given-ioff neutron of one's own, open liquid tracer release (1), beginning is sprayed the nonradioactive tracer with high thermal-neutron capture cross-section in well, tracer enters in the well and forms suspension with borehole fluid, flow with borehole fluid, the suspension that forms when tracer and borehole fluid flow through short space and long space detection system (4,5) time, high capture cross-section value will appear in log response, by analyzing log data, can calculate the situation of employing of flow velocity and the thin poor layer of borehole fluid.
2. on-radiation tracer flow survey method and flow process based on pulsed neutron technique according to claim 1, it is characterized in that: above-mentioned nonradioactive tracer is gadolinium or boron compound solution.
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| CN2013102902918A CN103321636A (en) | 2013-07-11 | 2013-07-11 | Non-radioactive tracing flow logging method and flow based on pulse neutron technology |
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| CN2013102902918A CN103321636A (en) | 2013-07-11 | 2013-07-11 | Non-radioactive tracing flow logging method and flow based on pulse neutron technology |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103590808A (en) * | 2013-10-26 | 2014-02-19 | 中国石油化工集团公司 | Heat tracing ejector |
| CN103760182A (en) * | 2014-01-02 | 2014-04-30 | 中国石油天然气股份有限公司 | Method and device for evaluating abundance of organic matter of hydrocarbon source rock |
| CN104265276A (en) * | 2014-09-12 | 2015-01-07 | 中国石油集团长城钻探工程有限公司测井公司 | Specific resistance tracer agent based flow measuring method and flowmeter |
| CN104594887A (en) * | 2014-12-01 | 2015-05-06 | 中国石油天然气股份有限公司 | Reagent for detecting whether oil layer enters high-temperature oxidation stage or not, application and equipment |
| CN108131132A (en) * | 2017-11-27 | 2018-06-08 | 中国石油天然气股份有限公司 | Instrument and method for testing underground gas flow |
| CN108194076A (en) * | 2017-12-27 | 2018-06-22 | 中国石油天然气股份有限公司 | Calibration interpretation method, device and chart for bidirectional pulse neutron oxygen activation logging instrument |
| CN113464130A (en) * | 2021-08-19 | 2021-10-01 | 陕西恒合石油科技有限公司 | Rapid and accurate water finding method for horizontal well |
| CN113638722A (en) * | 2021-02-07 | 2021-11-12 | 中国石油天然气集团有限公司 | Method for testing injection profile of nitrogen injection gas well by using tracing method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103590808A (en) * | 2013-10-26 | 2014-02-19 | 中国石油化工集团公司 | Heat tracing ejector |
| CN103590808B (en) * | 2013-10-26 | 2016-11-16 | 中国石油化工集团公司 | A kind of thermal trace ejector |
| CN103760182A (en) * | 2014-01-02 | 2014-04-30 | 中国石油天然气股份有限公司 | Method and device for evaluating abundance of organic matter of hydrocarbon source rock |
| CN104265276A (en) * | 2014-09-12 | 2015-01-07 | 中国石油集团长城钻探工程有限公司测井公司 | Specific resistance tracer agent based flow measuring method and flowmeter |
| CN104594887A (en) * | 2014-12-01 | 2015-05-06 | 中国石油天然气股份有限公司 | Reagent for detecting whether oil layer enters high-temperature oxidation stage or not, application and equipment |
| CN104594887B (en) * | 2014-12-01 | 2017-10-17 | 中国石油天然气股份有限公司 | Reagent for detecting whether oil layer enters high-temperature oxidation stage or not, application and equipment |
| CN108131132A (en) * | 2017-11-27 | 2018-06-08 | 中国石油天然气股份有限公司 | Instrument and method for testing underground gas flow |
| CN108194076A (en) * | 2017-12-27 | 2018-06-22 | 中国石油天然气股份有限公司 | Calibration interpretation method, device and chart for bidirectional pulse neutron oxygen activation logging instrument |
| CN108194076B (en) * | 2017-12-27 | 2021-03-26 | 中国石油天然气股份有限公司 | Calibration interpretation method, device and chart for bidirectional pulse neutron oxygen activation logging instrument |
| CN113638722A (en) * | 2021-02-07 | 2021-11-12 | 中国石油天然气集团有限公司 | Method for testing injection profile of nitrogen injection gas well by using tracing method |
| CN113464130A (en) * | 2021-08-19 | 2021-10-01 | 陕西恒合石油科技有限公司 | Rapid and accurate water finding method for horizontal well |
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Application publication date: 20130925 |