CN109239106A - Formation water salinity measuring device and method in a kind of well - Google Patents
Formation water salinity measuring device and method in a kind of well Download PDFInfo
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- CN109239106A CN109239106A CN201811329251.9A CN201811329251A CN109239106A CN 109239106 A CN109239106 A CN 109239106A CN 201811329251 A CN201811329251 A CN 201811329251A CN 109239106 A CN109239106 A CN 109239106A
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention discloses formation water salinity measuring devices in a kind of well, it is related to oil-gas exploration equipment technical field, including the Stainless Steel Shell being vertically placed in wellbore, remote He-3 pipe, BGO gamma detector, nearly He-3 pipe, tungsten ferronickel shield and D-T controllable neutron source are arranged at intervals with the inside of the Stainless Steel Shell is top-down, also discloses formation water salinity measurement method in well.The present invention utilizes controllable D-T controllable neutron source, two He-3 pipes and a BGO gamma detector, complete capture gamma spectra and nearly remote source away from the measurement for hankering sub-count, chemical neutron source is avoided to operator, overcomes the influence of thermal neutron flux and formation porosity to chlorine element gamma yield during underground survey；The formation water salinity that can provide continuous depth, the oil saturation being beneficial in water flooding property identification and oil-gas exploration calculate.
Description
Technical field
The present invention relates to formation water salinity measuring device in oil-gas exploration equipment technical field more particularly to a kind of well and
Method.
Background technique
Currently, mainly including to stratum core data experimental analysis and well water sample to the measurement method of formation water salinity
Analysis, so that it is determined that formation water salinity, understands water flooding mineralising property using this method, be conducive to water flooding property analysis and oil
Oil saturation in gas resource exploration calculates.
Formation water salinity is determined by the analysis to rock sample and well water sample, the influence vulnerable to wellbore aqueous nature
While being limited by sampling, difference obtains the formation water salinitys in continuous depth, when formation fluid property has in different depth
When large change, meet actual demand using sampling and analyzing method progress formation water salinity calculating is different.
Stratum element content analysis based on controllable neutron source, is commonly applied to formation rock Minerals and rocks, in utilization
Son excitation stratum element generates characteristic gamma ray, carries out capture or non-ballistic gamma spectrometry using gamma detector, passes through
Least square power spectrum analytical Calculation obtains each element gamma yield, so that it is determined that stratum element and mineral content.
Formation water salinity is defined as the content of inorganic salts in water flooding, therefore content of Cl element and formation water salinity are close
Cut phase is closed, since thermal neutron is easy the features gal such as radiation capture nuclear reaction to occur with chlorine element and generates 6.11MeV and 7.42MeV
Horse ray can obtain chlorine element gamma yield by obtaining capture Analysis of Gamma Energy Spectrum to measurement, the chlorine member that borehole measurement obtains
Plain gamma yield is not only related with formation water salinity, while the flux phase with the thermal neutron in formation porosity and investigative range
It closes.Nearly He-3 pipe measurement obtains hankering the thermal neutron flux that sub-count can reflect in investigative range, and closely far hankering sub-count ratio can
Reflect formation porosity.
Summary of the invention
In order to solve the above technical problems, the invention discloses a kind of capture gammas by borehole measurement different depth
Power spectrum and closely far hanker sub-count, and chlorine element gamma yield, formation porosity and nearly He-3 pipe thermal neutron is combined to count to get
Formation water salinity measuring device and method in the well of formation water salinity.
To achieve the above object, the present invention adopts the following technical solutions:
Formation water salinity measuring device in a kind of well, including the Stainless Steel Shell being vertically placed in wellbore, in institute
State Stainless Steel Shell inside it is top-down be arranged at intervals with remote He-3 pipe, BGO gamma detector, nearly He-3 pipe, tungsten ferronickel
Shield and D-T controllable neutron source.
Formation water salinity measurement method in a kind of well, using formation water salinity measuring device in above-mentioned well, in wellbore
In measurement in continuous depth is carried out to the formation water salinity in stratum, comprising the following steps:
Step 1: D-T controllable neutron source emits fast neutron with impulse form, and nearly He-3 pipe and remote He-3 pipe are entirely detecting
Thermal neutron counting detection, BGO gamma detector measurement capture gamma spectra are carried out in period；
Step 2: power spectrum parsing is carried out to the capture gamma spectra that measurement obtains using least square method, is calculated
Chlorine element gamma yield；
Step 3: sub-count is hankered according to what nearly He-3 pipe and remote He-3 pipe measured, formation porosity is calculated；
Step 4: water flooding mineralising is calculated in conjunction with chlorine element gamma yield, formation porosity and near-thermal neutron
Degree.
Further, the measurement period of the nearly He-3 pipe and remote He-3 pipe in step 1 and D-T controllable neutron source pulse week
Phase is consistent, and detection cycle is 200 μ s.
Further, the BGO gamma detector measurement period in step 1 is consistent with the D-T controllable neutron source pulse period,
Detection cycle is 200 μ s, and in a detection cycle, 0-30 μ s stops detection, 30-200 μ s measurement capture gamma spectra.
Further, the average energy of the D-T controllable neutron source given-ioff neutron in step 1 is about 14MeV, emits pulse
Period is 200 μ s, and in a pulse period, 0-20 μ s given-ioff neutron, 20-200 μ s neutron stops transmitting.
Further, in step 2, Cl element gamma yield can be calculated using least square method, such as formula (1):
Y=(ATA)-1ATX (1)
In formula, Y is comprising the different element gamma yield vectors including Cl element, and A is different elemental standards spectrum composition
Matrix, every column data represent certain element in the Gama Count in different-energy road, X be the obtained capture gamma spectra of measurement to
Amount.
Further, in step 3, formation porosity φ is calculated by formula (2):
Wherein, Nn2Sub-count, a are hankered for remote source position1、a2And a3For porosity calibration factor.
Further, in step 4, it can be calculated formation water salinity using formula (3):
Wherein, SAL is the formation water salinity being calculated, yClFor Cl element gamma yield, φ is formation porosity,
Nn1Sub-count, K are hankered for nearly source position1And K2For calibration factor.
The invention has the advantages that using controllable D-T controllable neutron source, two He-3 pipes and a BGO gamma detection
Device, complete capture gamma spectra and nearly remote source away from the measurement for hankering sub-count, avoid chemical neutron source to operator,
Overcome the influence of thermal neutron flux and formation porosity to chlorine element gamma yield during underground survey；It can provide continuous depth
The formation water salinity of degree, the oil saturation being beneficial in water flooding property identification and oil-gas exploration calculate.
Detailed description of the invention
Fig. 1 is the measuring device structural schematic diagram in the present invention；
Capture gamma spectra when Fig. 2 Different Strata water salinity；
Fig. 3 is salinity measured value and actual comparison figure under the conditions of Different Strata；
Fig. 4 is formation water salinity borehole measurement effect picture.
Wherein, 1, remote He-3 pipe；2, BGO gamma detector；3, nearly He-3 pipe；4, tungsten ferronickel shield；5, D-T it is controllable in
Component；6, Stainless Steel Shell；7, wellbore；8, stratum.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that the described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.Based on this
Embodiment in invention, every other reality obtained by those of ordinary skill in the art without making creative efforts
Example is applied, shall fall within the protection scope of the present invention.
Formation water salinity measuring device in a kind of well, as shown in Figure 1, include vertically be placed in it is stainless in wellbore 7
Steel sheel 6, the inside of the Stainless Steel Shell 6 it is top-down be arranged at intervals with remote He-3 pipe 1, BGO gamma detector 2,
Nearly He-3 pipe 3, tungsten ferronickel shield 4 and D-T controllable neutron source 5.
Formation water salinity measurement method in a kind of well, using above-mentioned 8 water salinity borehole measurement device of stratum, in wellbore
The measurement in continuous depth is carried out to the formation water salinity in stratum 8 in 7, comprising the following steps:
Step 1: D-T controllable neutron source 5 emits fast neutron with impulse form, and nearly He-3 pipe 3 measures the heat at nearly source position
Neutron counting hankers sub-count at the remote source position in remote 1 measurement source of He-3 pipe, and nearly He-3 pipe 3 and remote He-3 pipe 1 are entirely detecting
Thermal neutron counting detection, the measurement capture gamma spectra of BGO gamma detector 2 are carried out in period；
Step 2: power spectrum parsing is carried out to the capture gamma spectra that measurement obtains using least square method, is calculated
Chlorine element gamma yield；
Step 3: sub-count is hankered according to what nearly He-3 pipe 3 and remote He-3 pipe 1 measured, formation porosity is calculated；
Step 4: it is counted in conjunction with chlorine element gamma yield, formation porosity and near-thermal neutron, water flooding mineralising is calculated
Degree.
Particularly, the measurement period and D-T controllable neutron source 5 pulse week of the nearly He-3 pipe 3 in step 1 and remote He-3 pipe 1
Phase is consistent, and detection cycle is 200 μ s.
Particularly, 2 measurement period of BGO gamma detector in step 1 is consistent with 5 pulse period of D-T controllable neutron source,
Detection cycle is 200 μ s, and in a detection cycle, 0-30 μ s stops detection, 30-200 μ s measurement capture gamma spectra.
Particularly, the average energy of 5 given-ioff neutron of D-T controllable neutron source in step 1 is about 14MeV, transmitting pulse week
Phase is 200 μ s, and in a pulse period, 0-20 μ s given-ioff neutron, 20-200 μ s neutron stops transmitting.
It particularly, is the capture gamma energy of Different Strata water salinity under the conditions of same formation porosity in step 2
Spectrum, due to the variation of salinity, the Gama Count within the scope of Cl element energy window has difference, using least square method, such as formula
(1) Cl element gamma yield can be calculated:
Y=(ATA)-1ATX (1)
In formula, Y is comprising the different element gamma yield vectors including Cl element, and A is different elemental standards spectrum composition
Matrix, every column data represent certain element in the Gama Count in different-energy road, X be the obtained capture gamma spectra of measurement to
Amount.
Particularly, in step 3, formation porosity φ is calculated by formula (2):
Wherein, Nn2Sub-count, a are hankered for remote source position1、a2And a3For porosity calibration factor.
Particularly, in step 4, it can be calculated formation water salinity using formula (3):
Wherein, SAL is the formation water salinity being calculated, yClFor Cl element gamma yield, φ is formation porosity,
Nn1Sub-count, K are hankered for nearly source position1And K2For calibration factor.
The response relation of above-mentioned chlorine element gamma yield and formation water salinity obtains in test pit, K1 and K2 coefficient needs
To be determined in test pit (known salinity), measure chlorine element yield, the salinity of test pit be it is known, so K1 and K2
Coefficient value can be calculated.
Using the measurement method of above-mentioned formation water salinity underground survey device progress, it is respectively in formation porosity
10%, 15%, 20%, 25% when, formation water salinity measured value and actual comparison are as shown in Figure 3.
Borehole measurement effect picture of the invention is as shown in figure 4, be for first depth；Second is formation lithology section, the
Three be the sub-count of hankering at the remote source position for the nearly source position that measurement obtains, and the 4th is formation porosity theoretical value and meter
Calculation value, the 5th is the Cl element gamma yield being calculated, and the 6th is formation water salinity actual value (solid line) and measurement
It is worth (dotted line).
Certainly, the above description is not a limitation of the present invention, and the present invention is also not limited to the example above, this technology neck
The variations, modifications, additions or substitutions that the technical staff in domain is made within the essential scope of the present invention also should belong to of the invention
Protection scope.
Claims (8)
1. formation water salinity measuring device in a kind of well, which is characterized in that including the stainless steel being vertically placed in wellbore
Shell is arranged at intervals with remote He-3 pipe, BGO gamma detector, nearly He-3 the inside of the Stainless Steel Shell is top-down
Pipe, tungsten ferronickel shield and D-T controllable neutron source.
2. formation water salinity measurement method in a kind of well is measured using formation water salinity in well as described in claim 1
Device, which is characterized in that the measurement in continuous depth, including following step are carried out to the formation water salinity in stratum in the wellbore
It is rapid:
Step 1: D-T controllable neutron source emits fast neutron with impulse form, and nearly He-3 pipe and remote He-3 pipe are in entire detection cycle
Middle progress thermal neutron counting detection, BGO gamma detector measurement capture gamma spectra；
Step 2: power spectrum parsing is carried out to the capture gamma spectra that measurement obtains using least square method, chlorine member is calculated
Plain gamma yield；
Step 3: sub-count is hankered according to what nearly He-3 pipe and remote He-3 pipe measured, formation porosity is calculated；
Step 4: formation water salinity is calculated in conjunction with chlorine element gamma yield, formation porosity and near-thermal neutron.
3. formation water salinity measurement method in a kind of well as claimed in claim 2, which is characterized in that close in step 1
He-3 pipe is consistent with the D-T controllable neutron source pulse period with the measurement period of remote He-3 pipe, and detection cycle is 200 μ s.
4. formation water salinity measurement method in a kind of well as claimed in claim 2, which is characterized in that the BGO in step 1
Gamma detector measurement period is consistent with the D-T controllable neutron source pulse period, and detection cycle is 200 μ s, in a detection cycle,
0-30 μ s stops detection, 30-200 μ s measurement capture gamma spectra.
5. formation water salinity measurement method in a kind of well as claimed in claim 4, which is characterized in that the D-T in step 1
The average energy of controllable neutron source given-ioff neutron is about 14MeV, and the transmitting pulse period is 200 μ s, in a pulse period, 0-20
μ s given-ioff neutron, 20-200 μ s neutron stop transmitting.
6. formation water salinity measurement method in a kind of well as claimed in claim 2, which is characterized in that in step 2, utilize
Least square method, as Cl element gamma yield can be calculated in formula (1):
Y=(ATA)-1ATX (1)
In formula, Y is comprising the different element gamma yield vectors including Cl element, and A is the matrix of different elemental standards spectrum composition,
Every column data represents certain element in the Gama Count in different-energy road, and X is the capture gamma spectra vector that measurement obtains.
7. formation water salinity measurement method in a kind of well as claimed in claim 2, which is characterized in that in step 3, stratum
Porosity φ is calculated by formula (2):
Wherein, Nn2Sub-count, a are hankered for remote source position1、a2And a3For porosity calibration factor.
8. formation water salinity measurement method in a kind of well as claimed in claim 2, which is characterized in that in step 4, utilize
Formula (3) can be calculated formation water salinity:
Wherein, SAL is the formation water salinity being calculated, yClFor Cl element gamma yield, φ is formation porosity, Nn1It is close
Hanker sub-count, K in source position1And K2For calibration factor.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110454147A (en) * | 2019-07-31 | 2019-11-15 | 中国石油天然气集团有限公司 | A kind of controllable source integrated nuclear logging instrument and logging method |
| CN110486002A (en) * | 2019-08-26 | 2019-11-22 | 中国石油大学(北京) | Formation bulk density determines method and apparatus in neutron gamma density logging |
| CN112904436A (en) * | 2021-04-14 | 2021-06-04 | 中国石油大学(华东) | Porosity measurement method combining element yield and thermal neutron count ratio |
| CN115653574A (en) * | 2022-10-13 | 2023-01-31 | 安徽中科超安科技有限公司 | Neutron source yield self-adjusting neutron logging system and method |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3532885A (en) * | 1967-05-31 | 1970-10-06 | Dresser Ind | Method and apparatus for neutron lifetime well logging using dual discrimination within one of two intervals |
| US4575260A (en) * | 1984-05-10 | 1986-03-11 | Halliburton Company | Thermal conductivity probe for fluid identification |
| EP1927997A1 (en) * | 2006-12-01 | 2008-06-04 | Studsvik, Inc. | Steam reforming process system for graphite destruction and capture of radionuclides |
| CN102518431A (en) * | 2011-12-26 | 2012-06-27 | 中国石油大学(华东) | Multi-parameter logging method while drilling based on controllable neutron source |
| CN103343687A (en) * | 2013-07-09 | 2013-10-09 | 中国石油化工股份有限公司江汉油田分公司勘探开发研究院 | Method for obtaining degree of mineralization of equivalent sodium chloride of sandstone brine layer through well logging materials |
| CN103696765A (en) * | 2013-11-06 | 2014-04-02 | 中国石油大学(华东) | Double-LaBr3 detector element energy spectrum logger based on controllable neutron source and logging method |
| CN107505661A (en) * | 2017-07-25 | 2017-12-22 | 中国石油大学(华东) | A kind of detector elements well logging apparatus of controllable neutron three and method |
| US20180058188A1 (en) * | 2016-08-24 | 2018-03-01 | Saudi Arabian Oil Company | Formation water salinity from borehole measurements |
| CN108019204A (en) * | 2016-11-04 | 2018-05-11 | 中国石油天然气股份有限公司 | Neutron-gamma gas layer identification method based on physical property and formation water mineralization correction |
| CN108643890A (en) * | 2018-03-14 | 2018-10-12 | 中国石油大学(北京) | A kind of method of determining formation porosity |
-
2018
- 2018-11-09 CN CN201811329251.9A patent/CN109239106A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3532885A (en) * | 1967-05-31 | 1970-10-06 | Dresser Ind | Method and apparatus for neutron lifetime well logging using dual discrimination within one of two intervals |
| US4575260A (en) * | 1984-05-10 | 1986-03-11 | Halliburton Company | Thermal conductivity probe for fluid identification |
| EP1927997A1 (en) * | 2006-12-01 | 2008-06-04 | Studsvik, Inc. | Steam reforming process system for graphite destruction and capture of radionuclides |
| CN102518431A (en) * | 2011-12-26 | 2012-06-27 | 中国石油大学(华东) | Multi-parameter logging method while drilling based on controllable neutron source |
| CN103343687A (en) * | 2013-07-09 | 2013-10-09 | 中国石油化工股份有限公司江汉油田分公司勘探开发研究院 | Method for obtaining degree of mineralization of equivalent sodium chloride of sandstone brine layer through well logging materials |
| CN103696765A (en) * | 2013-11-06 | 2014-04-02 | 中国石油大学(华东) | Double-LaBr3 detector element energy spectrum logger based on controllable neutron source and logging method |
| US20180058188A1 (en) * | 2016-08-24 | 2018-03-01 | Saudi Arabian Oil Company | Formation water salinity from borehole measurements |
| CN108019204A (en) * | 2016-11-04 | 2018-05-11 | 中国石油天然气股份有限公司 | Neutron-gamma gas layer identification method based on physical property and formation water mineralization correction |
| CN107505661A (en) * | 2017-07-25 | 2017-12-22 | 中国石油大学(华东) | A kind of detector elements well logging apparatus of controllable neutron three and method |
| CN108643890A (en) * | 2018-03-14 | 2018-10-12 | 中国石油大学(北京) | A kind of method of determining formation porosity |
Non-Patent Citations (8)
| Title |
|---|
| A. I. KEDROV等: "Neutron-gamma Well Logging Apparatus with More Sensitivity for Chlorine", 《APPL. RADIAT. ISOT》 * |
| B. YU. BOGDANOVICH等: "POSSIBILITIES OF INCREASING LOGGING EFFICIENCY WITH SIMULTANEOUS ANALYSIS OF NEUTRON AND GAMMA FIELDS FORMED IN OIL WELLS", 《ATOMIC ENERGY》 * |
| LILI TIAN等: "Logging method for formation water salinity determination by PGNAA technology", 《JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY》 * |
| 冯启宁等: "《测井仪器原理》", 31 October 1992, 石油大学出版社 * |
| 周鹏飞: "基于蒙特卡罗方法的脉冲中子地层多元素测井研究", 《中国优秀硕士学位论文全文数据库 基础科学辑》 * |
| 谭廷栋等: "《测井解释基础与数据采集》", 31 January 1992, 石油工业出版社 * |
| 黄华等: "基于地球物理测井参数的深层卤水矿化度方法研究", 《矿床地质》 * |
| 黄隆基等: "脉冲中子非弹性散射和俘获伽玛能谱测井", 《测井技术》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110454147A (en) * | 2019-07-31 | 2019-11-15 | 中国石油天然气集团有限公司 | A kind of controllable source integrated nuclear logging instrument and logging method |
| CN110486002A (en) * | 2019-08-26 | 2019-11-22 | 中国石油大学(北京) | Formation bulk density determines method and apparatus in neutron gamma density logging |
| CN112904436A (en) * | 2021-04-14 | 2021-06-04 | 中国石油大学(华东) | Porosity measurement method combining element yield and thermal neutron count ratio |
| CN115653574A (en) * | 2022-10-13 | 2023-01-31 | 安徽中科超安科技有限公司 | Neutron source yield self-adjusting neutron logging system and method |
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