CN105569640A - Tracer-related traffic logging method - Google Patents
Tracer-related traffic logging method Download PDFInfo
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- CN105569640A CN105569640A CN201610070804.8A CN201610070804A CN105569640A CN 105569640 A CN105569640 A CN 105569640A CN 201610070804 A CN201610070804 A CN 201610070804A CN 105569640 A CN105569640 A CN 105569640A
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- 239000000700 radioactive tracer Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000002347 injection Methods 0.000 claims abstract description 32
- 239000007924 injection Substances 0.000 claims abstract description 32
- 239000007788 liquid Substances 0.000 claims abstract description 30
- 230000005855 radiation Effects 0.000 claims abstract description 5
- 238000005259 measurement Methods 0.000 claims description 22
- 238000010521 absorption reaction Methods 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000011109 contamination Methods 0.000 abstract description 4
- 230000000149 penetrating effect Effects 0.000 abstract description 2
- 239000011148 porous material Substances 0.000 abstract description 2
- 230000005465 channeling Effects 0.000 abstract 1
- 238000001730 gamma-ray spectroscopy Methods 0.000 description 11
- 239000010410 layer Substances 0.000 description 8
- 230000002285 radioactive effect Effects 0.000 description 6
- 238000011161 development Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000000155 isotopic effect Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 239000000941 radioactive substance Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/04—Measuring depth or liquid level
- E21B47/053—Measuring depth or liquid level using radioactive markers
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/14—Obtaining from a multiple-zone well
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V5/00—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity
- G01V5/04—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging
- G01V5/08—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays
- G01V5/12—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays using gamma or X-ray sources
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- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geophysics (AREA)
- Geochemistry & Mineralogy (AREA)
- High Energy & Nuclear Physics (AREA)
- General Physics & Mathematics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention discloses a tracer-related traffic logging method. The tracer-related traffic logging method includes the following steps that tracers are released above a water distributor; when the tracers enter liquid injected from the water distributor to a well, tracing peaks are repeatedly traced up and down through a gamma detector to continuously measure the depth positions of the tracing peaks at different moments; when the gamma detector moves upwards and the tracing peaks are measured, the gamma detector returns downwards, and when the gamma detector moves downwards and the tracing peaks are measured, the gamma detector returns upwards till the radiation conditions detected by the gamma detector are not changed along with time any more. The tracer-related traffic logging method is a continuous measuring method, and has high measuring accuracy and the low measuring lower limit, and the water sucking capacity of all small layers can be accurately measured; the tracer-related traffic logging method has the obvious advantages for a well with the low injection volume, logging time is shortened, logging cost is reduced, and the influences of large pore paths, deep penetrating holes, contamination, channeling and leakage can be further avoided.
Description
Technical field
The present invention relates to oil field development field, particularly relate to the measurement of the water absorption of each water accepting layer in multi-zone flow regulating well.
Background technology
On stream, more than 90% is utilize infusion and the difference in specific gravity of oil, by techniques such as water filling, gas injection, polymer injections, fluid is floated, is convenient to exploitation, realize produce oil in oil field.In the oil field that multilayer is exploited simultaneously, be the significant data that oil reservoir expert grasps development behavior situation to the understanding of the water absorption of each layer of Injection Well, Chinese onshore oil field, about has more than 30,000 mouthfuls of Injection Wells, Injection Well is based on water filling, and thus the present invention is described for water filling.By development technique requirement, at least to measure once every year.For general Injection Well, available various Conventional meters is measured, but for multi-zone flow regulating well, the screen due to oil reservoir worn-out effect is the water absorption that cannot measure each water accepting layer with Conventional meters.
For the measurement of multi-zone flow regulating well water absorption, the method generally adopted at present is radiolabel method.The principle of the method is: carry measuring apparatus with cable, in G.I.H oil pipe, discharges radio isotope particle as tracer in appropriate depth from measuring apparatus.Tracer suspends in water, and is migrated by current, represents water velocity with the migration velocity of tracer.These particles enter in each water accepting layer with water, and filter is amassed in preforation tunnel.Measure with the gamma-spectrometry instrument of down-hole.Tracer is in the form of assembling with flow, and gamma-spectrometry instrument detects peak value at tracer through out-of-date.By recording time and the position at spike peak, the flow velocity of fluid between two peak values can be calculated, and then calculate the flow of this place's fluid, the water absorption on stratum.Radiolabel method, at the wide model of field use, but the method also also exists the shortcoming that cannot overcome.
In radiolabel method, after release tracer, the degree of depth that being transferred to rapidly by gamma-spectrometry instrument needs to measure waits for spike peak, and after measuring spike peak, row is transferred to the degree of depth needing to measure and waited for spike peak again, so repeatedly measures.That is, gamma-spectrometry instrument right place waits for the arrival at spike peak, gamma-spectrometry instrument at a time T1 is arranged on a certain depth H 1 and measures, then be arranged on next depth H 2 at subsequent time T2 to measure ... because measurement moment and the degree of depth are discrete, in depth interval △ H=H2-H1, the situation on stratum is not measured, and thus can not reflect water suction or other relevant circumstances on stratum in the depth interval △ H between adjacent two degree of depth; It is improper to arrange if fathomed, and also possibly cannot obtain significant measurement result.And, depth H 1 set during usual operation, depth H 2, its depth interval △ H is much larger than the size of gamma-spectrometry instrument, thus for the situation that adjacent water-absorbing layers depth interval △ H is less, especially the situation of gamma-spectrometry instrument length is less than, can not track the peak value of interlayer in time, radiolabel method is difficult to the requirement meeting certainty of measurement, and it is limited to the size of gamma-spectrometry instrument.
In actual use, also there is following shortcoming in radiolabel method:
1, stain: owing to adopting solid-state radioactive grain as tracer, when oil reservoir and internal surface of sleeve pipe have greasy dirt or radioactive grain proportion be greater than water more time, the serious pickup of oil jacket tube wall and box cupling instrument can be caused, it can adhere to a large amount of radioactive grains, affect certainty of measurement thus.
2, macropore: when the stratum preforation tunnel degree of depth is larger (40cm-80cm), or when formation pore is greater than radioactive grain, it is comparatively dark that it enters stratum, or in eyelet skewness.Cause the investigative range that exceeds gamma-spectrometry instrument and do not detect radiation intensity data, the data of measurement affect by itself and instrument horizontal range, cause error serious, so that data cannot use.
If 3 existence pipes are outer alter groove, isotopic carrier can enter non-perforating stratum along outside tube water mud ring passage, and data often shows curve has larger amplitude abnormal at non-perforated interval, but this curvilinear characteristic is similar to contamination.
Summary of the invention
The object of the present invention is to provide a kind of spike correlative flow well logging method, it can improve certainty of measurement.
Spike correlative flow well logging method of the present invention, it comprises the following steps: above injection well downhole flow regulator, discharge tracer; When tracer enters after the liquid injected in well by injection well downhole flow regulator, gamma detector is made repeatedly to follow the trail of spike peak up and down, with continuous measurement spike peak at not depth location in the same time, up record spike peak after namely return downwards, descending record spike peak after namely return upwards, until the radiation situation that gamma detector detects changes no longer in time.
Wherein, also comprise: the radioactivity pulse according to the expression spike peak measuring gained calculates in order as follows at not depth location in the same time: calculate the time interval △ T between adjacent two pulses
i=t
i+1-t
iwith depth interval △ P
i=h
i+1-h
i, described adjacent two pulses are only for the spike peak of upstream or downstream for one of them; Calculate the flow Q of the liquid of this depth interval place depth
i=k △ P
i/ △ T
i, wherein, k is the cross-sectional area of oil pipe or sleeve pipe; Calculate the water absorption Q on each stratum
fi=Q
u-Q
d, wherein, Q
fifor the water absorption of stratum Fi, Q
ufor the flow of stratum Fi upper surface depth, Q
dfor the flow of stratum Fi soffit depth, Q
u, Q
dby calculated flow rate Q
iobtain, Q
uvalue is the flow Q that on the Fi upper surface of stratum, distance stratum Fi upper surface is nearest
i, Q
dvalue is the flow Q that under the Fi soffit of stratum, distance stratum Fi soffit is nearest
i.
Preferably, the test speed of gamma detector is 1000m/h-4000m/h.
Preferably, the liquid tracer of proportion identical with liquid in well selected by tracer.
Preferably, discharge tracer above injection well downhole flow regulator after, before tracer enters the liquid injected in well by injection well downhole flow regulator, gamma detector is made repeatedly to follow the trail of spike peak up and down, with continuous measurement spike peak at not depth location in the same time.
Preferably, also measure packer and whether there is tracer outward, and judge: as existed, then this packer sealing is bad; If do not existed, then this packer sealing is good.
Beneficial effect of the present invention is:
In spike correlative flow well logging method of the present invention, gamma-spectrometry instrument is repeatedly upper and lower, to follow the trail of spike peak.Gamma-spectrometry instrument always ceaselessly measuring continuously, can calculate water velocity more accurately, thus determining total flow in upper and lower process, if there is water accepting layer underground in water suction, flow will reduce, thus can better calculate the water absorption of each water accepting layer.
Relative to radiolabel method in the past, because spike correlative flow well logging method of the present invention is that continous way is measured, do not deposit the depth interval △ H not carrying out measuring, also can Measurement accuracy even if adjacent water-absorbing layers depth interval △ H is less.Thus, the present invention has higher certainty of measurement, lower measurement lower limit, and can measure the water absorbing capacity of each substratum more exactly, the well tools for low injection rate has obvious advantage.
In the present invention, by discharge tracer above injection well downhole flow regulator after, before tracer enters injection well downhole flow regulator, follow the trail of spike peak with gamma detector, the oil pipe flow above this injection well downhole flow regulator can be calculated more accurately.
Whether the present invention exists tracer outward by measuring packer, can also measure the packer sealing situation that this injection well downhole flow regulator is upper and lower, judge whether packer has leakage.
Employing of the present invention proportion identical with liquid in well, there is radioactive liquid tracer, the attachment of tracer can not be produced, avoid the problem of contamination.Further, compare isotope particle, liquid tracer has certain viscosity, is not easy to go deep into stratum, can also avoid the problem of macropore.
Groove problem is altered for outside macropore and pipe, because the present invention is that continous way is measured, measure flow velocity, the flow of each degree of depth in depth bounds to be measured incessantly, be thus easier to the situation and the generation position thereof that find data exception, for problem diagnosis and subsequent treatment provide data foundation accurately.
The present invention can adopt single gamma detection instrument to carry out continous way measurement, and for an injection well downhole flow regulator, only release tracer just can be measured clear the water swelling elastomer on the stratum of this injection well downhole flow regulator institute injection allocation.It not only increases certainty of measurement, also shortens log-time, reduces logging cost, and can overcome macropore, deep penetrating perforating, stains, alters the impact of groove, leakage.
Accompanying drawing explanation
Fig. 1 is the principle schematic of spike correlative flow well logging method of the present invention.
Detailed description of the invention
With reference to the accompanying drawings embodiments of the present invention are described.
Measuring principle: the tracer discharged and the liquid injected into well (water, polymer or ternary liquid) Homogeneous phase mixing and thereupon together with flow, the two flow velocity is identical.Utilize gamma detector can the flow direction of tracking and testing tracer and flow velocity, thus obtain the flow velocity injecting liquid.The liquid injected into well is for inject by injection well downhole flow regulator (water nozzle).After tracer release, with the liquid injected from water nozzle to external diffusion, like this, at a time, centered by water nozzle, respectively will form a spike peak up and down, spike peak is different in the position in different moment, extends in time and constantly away from water nozzle.When gamma detector has the heels of the front diffuse of tracer, measured gamma curve just there will be spike peak (being shown as radioactivity pulse).By gamma detector up and down repeatedly, several spike peaks can be recorded following correlation computations is carried out to different spike peaks, the flow velocity of liquid in certain degree of depth can be calculated, and then converse flow, then obtain zonal flow rate.
Specifically, as shown in Figure 1, spike peak is different at not residing in the same time depth location.Measured pulse i is at moment t
ibe positioned at degree of depth h
i, measured adjacent next pulse i+1 is at moment t
i+1be positioned at degree of depth h
i+1, according between adjacent two pulses
Time interval △ T
i=t
i+1-t
i, and
Depth interval △ P
i=h
i+1-h
i,
The flow of the liquid on this depth interval can be calculated, be considered as the flow at the depth location place of any point on this depth interval approx, be designated as the flow Q of the liquid of this depth
i.
Wherein, V
ifor the flow velocity of the liquid on this depth interval, k is the cross-sectional area of oil pipe or sleeve pipe.
Described adjacent two pulses are only for the spike peak of upstream or downstream for one of them.
By calculating the flow Q of variant depth liquid
i, and then the water absorption on each stratum can be calculated.
Q
Fi＝Q
U-Q
D
Wherein, Q
fifor the water absorption of stratum Fi, Q
ufor the flow of stratum Fi upper surface depth, Q
dfor the flow of stratum Fi soffit depth, Q
u, Q
dby calculated flow rate Q
iobtain, Q
uvalue is measurement that on the Fi upper surface of stratum, distance stratum Fi upper surface is nearest, the flow Q calculating gained
i, Q
dvalue is measurement that under the Fi soffit of stratum, distance stratum Fi soffit is nearest, the flow Q calculating gained
i.
As mentioned above, only need measure spike peak during measurement at not depth location in the same time, the water absorption on each stratum can be calculated.Measure operation: above injection well downhole flow regulator, discharge tracer, when tracer enters after the liquid injected in well by injection well downhole flow regulator, gamma detector is made repeatedly to follow the trail of spike peak up and down with test the speed (the testing the speed according to the flow velocity of on-the-spot well liquid and determine) of such as 1000-4000m/h, with continuous measurement spike peak at not depth location in the same time, up record spike peak after namely return downwards, descending record spike peak after namely return upwards.So can monitor the flow direction and the flow velocity of tracer constantly, until tracer all enters stratum, till the radiation situation that gamma detector detects changes no longer in time.
Like this, for an injection well downhole flow regulator, only release tracer just can be measured clear the water swelling elastomer on the stratum of this injection well downhole flow regulator institute injection allocation.
Whether there is tracer outward by measuring packer, the packer sealing situation that this injection well downhole flow regulator is upper and lower can also be measured.
Preferably, tracer of the present invention adopts the liquid tracer of proportion identical with liquid in well, the liquid tracer of identical proportion with liquid in well of such as radioactive substance and potassium chloride mixed with polymers., to solve in prior art the contamination problems adopting solid-state radioactive grain to produce as tracer.
Preferably, discharge tracer above water nozzle after, before tracer enters injection well downhole flow regulator, gamma detector follows the trail of the continuous measurement of spike peak, namely transfer fast and have the heels of tracer, and then rapidly on carry, repeatedly record several spike peak curves, the time m-depth data at the spike peak obtained thus may be used for the oil pipe flow calculated above this injection well downhole flow regulator more accurately.
Above-described embodiment, just the present invention's more preferably detailed description of the invention, the usual change that those skilled in the art carries out within the scope of technical solution of the present invention and replacement all should be included in protection scope of the present invention.
Claims (6)
1. a spike correlative flow well logging method, is characterized in that, comprises the following steps:
Tracer is discharged above injection well downhole flow regulator;
When tracer enters after the liquid injected in well by injection well downhole flow regulator, gamma detector is made repeatedly to follow the trail of spike peak up and down, with continuous measurement spike peak at not depth location in the same time, up record spike peak after namely return downwards, descending record spike peak after namely return upwards, until the radiation situation that gamma detector detects changes no longer in time.
2. spike correlative flow well logging method according to claim 1, is characterized in that, also comprise: the radioactivity pulse according to the expression spike peak measuring gained calculates in order as follows at not depth location in the same time:
Calculate the time interval △ T between adjacent two pulses
i=t
i+1-t
iwith depth interval △ P
i=h
i+1-h
i, described adjacent two pulses are only for the spike peak of upstream or downstream for one of them;
Calculate the flow Q of the liquid of this depth interval place depth
i=k △ P
i/ △ T
i, wherein, k is the cross-sectional area of oil pipe or sleeve pipe;
Calculate the water absorption Q on each stratum
fi=Q
u-Q
d, wherein, Q
fifor the water absorption of stratum Fi, Q
ufor the flow of stratum Fi upper surface depth, Q
dfor the flow of stratum Fi soffit depth, Q
u, Q
dby calculated flow rate Q
iobtain, Q
uvalue is the flow Q that on the Fi upper surface of stratum, distance stratum Fi upper surface is nearest
i, Q
dvalue is the flow Q that under the Fi soffit of stratum, distance stratum Fi soffit is nearest
i.
3. spike correlative flow well logging method according to claim 1, is characterized in that, the test speed of gamma detector is 1000m/h-4000m/h.
4. spike correlative flow well logging method according to claim 1, is characterized in that, the liquid tracer of proportion identical with liquid in well selected by tracer.
5. spike correlative flow well logging method according to claim 1, it is characterized in that, discharge tracer above injection well downhole flow regulator after, before tracer enters the liquid injected in well by injection well downhole flow regulator, gamma detector is made repeatedly to follow the trail of spike peak up and down, with continuous measurement spike peak at not depth location in the same time.
6. spike correlative flow well logging method according to claim 1, is characterized in that, measures packer and whether there is tracer outward, and judge: as existed, then this packer sealing is bad; If do not existed, then this packer sealing is good.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610070804.8A CN105569640A (en) | 2016-02-02 | 2016-02-02 | Tracer-related traffic logging method |
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|---|---|---|---|
| CN201610070804.8A CN105569640A (en) | 2016-02-02 | 2016-02-02 | Tracer-related traffic logging method |
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Family
ID=55880196
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109655930A (en) * | 2019-01-15 | 2019-04-19 | 中国海洋石油集团有限公司 | Gamma-ray detection system and signal calibration and blending agent phase fraction calculation method |
| CN110514568A (en) * | 2018-05-22 | 2019-11-29 | 中国石油化工股份有限公司 | Rock permeability performance anisotropy measurement device and method |
| 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 |
| CN111305828A (en) * | 2018-12-12 | 2020-06-19 | 中国石油化工股份有限公司 | Method for detecting water outlet layer and water direction of oil well by using radioactive hydrophilic particles |
| CN111472760A (en) * | 2020-06-01 | 2020-07-31 | 西南石油大学 | Novel method for extracting related flow well logging tracing peak |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110514568A (en) * | 2018-05-22 | 2019-11-29 | 中国石油化工股份有限公司 | Rock permeability performance anisotropy measurement device and method |
| CN111305828A (en) * | 2018-12-12 | 2020-06-19 | 中国石油化工股份有限公司 | Method for detecting water outlet layer and water direction of oil well by using radioactive hydrophilic particles |
| CN111305828B (en) * | 2018-12-12 | 2022-09-23 | 中国石油化工股份有限公司 | Method for detecting oil well water outlet layer and water inlet direction by using radioactive hydrophilic particles |
| CN109655930A (en) * | 2019-01-15 | 2019-04-19 | 中国海洋石油集团有限公司 | Gamma-ray detection system and signal calibration and blending agent phase fraction calculation method |
| CN109655930B (en) * | 2019-01-15 | 2023-09-22 | 中国海洋石油集团有限公司 | Gamma ray detection system and signal calibration and mixed medium phase fraction calculation method |
| 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 |
| CN110863807B (en) * | 2019-11-06 | 2022-05-10 | 中国石油天然气股份有限公司 | Method for judging water absorption condition of oil-water well |
| CN111472760A (en) * | 2020-06-01 | 2020-07-31 | 西南石油大学 | Novel method for extracting related flow well logging tracing peak |
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Application publication date: 20160511 |