CN105678473B - Identification method for oil reservoir water displacement efficiency of water injection development oil reservoir - Google Patents
Identification method for oil reservoir water displacement efficiency of water injection development oil reservoir Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 79
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000011161 development Methods 0.000 title abstract description 15
- 238000002347 injection Methods 0.000 title abstract 4
- 239000007924 injection Substances 0.000 title abstract 4
- 239000011435 rock Substances 0.000 claims abstract description 71
- 238000005259 measurement Methods 0.000 claims abstract description 23
- 238000005481 NMR spectroscopy Methods 0.000 claims abstract description 20
- 238000012937 correction Methods 0.000 claims abstract description 14
- 238000012545 processing Methods 0.000 claims abstract description 4
- 238000002360 preparation method Methods 0.000 claims abstract 2
- 239000003921 oil Substances 0.000 claims description 109
- 238000012360 testing method Methods 0.000 claims description 41
- 230000035699 permeability Effects 0.000 claims description 19
- 239000010779 crude oil Substances 0.000 claims description 7
- 230000005311 nuclear magnetism Effects 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- WAEMQWOKJMHJLA-UHFFFAOYSA-N Manganese(2+) Chemical compound [Mn+2] WAEMQWOKJMHJLA-UHFFFAOYSA-N 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 229910001437 manganese ion Inorganic materials 0.000 claims description 5
- 238000004164 analytical calibration Methods 0.000 claims description 4
- 230000003750 conditioning effect Effects 0.000 claims description 4
- 238000002474 experimental method Methods 0.000 claims description 4
- 238000005213 imbibition Methods 0.000 claims description 4
- 238000010835 comparative analysis Methods 0.000 claims description 3
- 238000012790 confirmation Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 3
- 239000002352 surface water Substances 0.000 claims description 3
- 239000008398 formation water Substances 0.000 claims description 2
- 229910021380 Manganese Chloride Inorganic materials 0.000 claims 2
- GLFNIEUTAYBVOC-UHFFFAOYSA-L Manganese chloride Chemical compound Cl[Mn]Cl GLFNIEUTAYBVOC-UHFFFAOYSA-L 0.000 claims 2
- 239000011565 manganese chloride Substances 0.000 claims 2
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000004458 analytical method Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 4
- 238000000197 pyrolysis Methods 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract description 2
- 239000007787 solid Substances 0.000 abstract description 2
- 238000009412 basement excavation Methods 0.000 abstract 1
- 238000004364 calculation method Methods 0.000 abstract 1
- 238000005406 washing Methods 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 4
- VQLYBLABXAHUDN-UHFFFAOYSA-N bis(4-fluorophenyl)-methyl-(1,2,4-triazol-1-ylmethyl)silane;methyl n-(1h-benzimidazol-2-yl)carbamate Chemical compound C1=CC=C2NC(NC(=O)OC)=NC2=C1.C=1C=C(F)C=CC=1[Si](C=1C=CC(F)=CC=1)(C)CN1C=NC=N1 VQLYBLABXAHUDN-UHFFFAOYSA-N 0.000 description 3
- 238000009738 saturating Methods 0.000 description 3
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000002332 oil field water Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000004451 qualitative analysis Methods 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000004457 water analysis Methods 0.000 description 1
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Abstract
The invention relates to an identification method for the oil reservoir water displacement efficiency of a water injection development oil reservoir, which comprises rock sample processing, instrument preparation, rock sample original state nuclear magnetic resonance measurement, data measurement and correction, and calculation of the oil reservoir water displacement efficiency of a tested core, wherein the average value of the oil reservoir water displacement efficiency values calculated by a plurality of cores is the oil reservoir water displacement efficiency of the oil reservoir. The identification method for the oil reservoir water displacement efficiency of the water injection development oil reservoir can provide a method for evaluating the oil displacement water efficiency for improving the oil displacement water effect and further improving the oil reservoir water displacement recovery rate after the oil reservoir is developed by low-permeability water injection and enters a high-water-content development period in an oil field; the pyrolysis analysis result and the core analysis result of the oil saturation of the oil layer are consistent, the reality of the analyzed oil layer can be reflected, the phenomenon of multiple interpretations of the same oil layer is avoided, the water flooding development effect of a water flooding development oil field can be preliminarily evaluated, the residual oil distribution of the oil layer is determined, and a solid foundation is laid for determining the main excavation and submergence direction and the technical method for oil field development and adjustment.
Description
Technical field
The invention belongs to oil gas development technology fields, and in particular to a kind of waterflooding reservoir oil-reservoir water oil displacement efficiency is sentenced
Knowledge method.
Background technique
Washing degree is the important finger that oil reservoir development water drive oil judges oil field development situation and measure development prospect in the process
Mark.According to China National Petroleum professional standard SY/T5366-2000 " requirement of oil field development well coring data tech ", oil reservoir at present
Washing degree is according to the comprehensive judgements such as the core description of coring well and indoor Analysis of displacement efficiency, the side of combination of qualitative and quantitative analysis
Formula, if oil displacement efficiency less than 5%, contaminates chirality by force, rank of dripping is 4 grades, and the sense of microscopic observation grease is strong, rock particles surface is not done
Only, see oil film, wet sense that other feature is for example amphidromic, bed plane often ooze out oil droplet, then are judged to not washing；If oil displacement efficiency is less than
35%, hand is contaminated, rank of dripping is 3 grades, and microscopic observation rock core is that glassy lustre, rare moisture film, rock particles surface be not clean,
Its feature such as has damp, local color shoals, then is determined as weak washing；If oil displacement efficiency is greater than 35% less than 55%, hand is tinged,
Rank of dripping is 2 grades, and microscopic observation rock core is glassy lustre, particle surface is relatively clean, water breakthrough film, and other feature is if any water-wet
Sense, color change is big, has obvious washing interface, then is determined as middle washing；If oil displacement efficiency is greater than 55%, hand is not contaminated, rank of dripping
It is 1 grade, microscopic observation rock core is that glassy lustre, particle surface be very clean, water breakthrough pearl, other feature such as water-wet sense is strong, between stratification
There is droplet to overflow, have obvious washing interface, is then judged to washing by force.
Oil-water displacement efficiency is the unique quantitative target judged in washing degree, but each used in the calculating of oil-water displacement efficiency
The current oil saturation of block rock core is on-site measurement, block average value when initial oil saturation builds production using block or
The borrow value of neighbouring wellblock oil reservoir, necessarily brings biggish deviation, the oil displacement efficiency being calculated cannot reflect analyzed oil reservoir
Often there is the phenomenon that same oil reservoir a variety of explanations in the reality of rock core, to determining that washing degree, selection improving ecology technology cause
Extreme difficulty and technical risk.
Summary of the invention
The purpose of the invention is to overcome the calculating of existing oil-water displacement efficiency judgement to be easy to bring biggish error, no
Often there is the phenomenon that same oil reservoir a variety of explanations, to judgement washing degree, selects in the reality that can reflect analyze oil reservoir rock core
Improving ecology technology causes the problem of extreme difficulty and technical risk.
For this purpose, sentencing knowledge method the present invention provides a kind of waterflooding reservoir oil-reservoir water oil displacement efficiency, including walk as follows
It is rapid:
Step 1: rock sample processing
It receives standby survey after rock sample product and checks quantity and rock sample label according to rock sample inventory, edit and record test sample after confirmation
Number is ready for nuclear-magnetism test；
Step 2: instrument prepares
1., correctly setting and conditioning instrumentation measurement parameter: by running under test equipment open state, 5 hours progress equipment is pre-
Heat, performance are adjusted and set test parameter with the standard sample of porosity 27% after stablizing；
2., instrument calibration, generate calibration file: with 10 measurement nuclear magnetic signals of standard sample of porosity 1%~27%, giving birth to
File is calibrated at detection.
3., the measurement of crude oil correction factor: measure nuclear magnetic signal with the dewatered oil of tested core sample block, convert crude oil
Correction factor；
Step 3: rock sample reset condition Nuclear Magnetic Resonance Measurement
1., with micro- wet filter paper remove rock sample surface water；
2., Nuclear Magnetic Resonance Measurement, measure porosity, permeability, mobile water saturation, irreducible water saturation quadrinomial parameter；
Step 4: doing rock core flood pot test under formation temperature, pressure condition, obtains irreducible water saturation, original contains
Three oily saturation degree, residual oil saturation parameters, and corresponding oil saturation is tested with nuclear magnetic resonance rock analyzer simultaneously；
Step 5: correction oil saturation
According to the measurement result in step 3, the core sample of different permeabilities and porosity, comparative analysis step are tested
The oil saturation of initial oil saturation and the test of nuclear magnetic resonance rock analyzer in four, loses reservoir oil saturation
Amount is restored, and correction imbibition acts on the influence tested oil saturation, the oil-containing saturation of institute's testing rock core after being corrected
Degree；
Step 6: by the oil saturation of institute's testing rock core, the irreducible water saturation of saturation state, the original of rock core after correcting
The oil-water displacement efficiency of beginning oil saturation calculating institute's testing rock core；
Step 7: it according to permeability obtained in step 3, chooses different permeability and its mean permeability and oil reservoir seeps
Saturating five pieces or more equal rock cores of rate test respective oil-water displacement efficiency respectively, and taking the average value of measured result is the oil reservoir
Oil-water displacement efficiency.
Standby survey rock sample product weight demands core sample > 25g in the step one, landwaste sample > 5g are processed into diameter 3-
The rock sample particle of 10mm carries out nuclear-magnetism test；
Three parameters of irreducible water saturation, initial oil saturation, residual oil saturation in the step four pass through
Following procedure obtains,
1., the saturation MnCl that is first 20000mg/l with manganese ion concentration2Water does oily expelling water experiment, it is full to obtain irreducible water
And degree, initial oil saturation, while the oil saturation is tested with nuclear magnetic resonance rock analyzer；
2. and then the MnCl for being 20000mg/l with manganese ion concentration2Water does water drive oil displacement test, obtains residual oil saturation
Degree, while the oil saturation is tested with nuclear magnetic resonance rock analyzer.
The oil-water displacement efficiency of rock core is calculate by the following formula in the step six,
Beneficial effects of the present invention: this waterflooding reservoir oil-reservoir water oil displacement efficiency provided by the invention sentences knowledge side
Method can be improving ecology oil effect, further in hyposmosis waterflooding reservoir, into after high water-cut development period in oil field
It improves reservoir water drive recovery ratio and the method for evaluation oil-water displacement efficiency is provided.Suitable for the low-permeability oil deposit of waterflooding extraction, oil reservoir seeps
Saturating rate 1~50 × 10-3Um2, reservoir temperature are not higher than 70 DEG C, and formation water salinity is lower than 100000mg/L, oil viscosity
Oil reservoir lower than 10mPa.s.
The present invention passes through the nuclear magnetic resonance rock analysis of sandstone reservoirs rock core different conditions, movable fluid cutoff value, imbibition
The correction tested oil saturation is acted on, the oil-water displacement efficiency of rock core is calculated, for the washing degree for determining oil-bearing stratum flooding
Accurate quantitative analysis data are provided.The analysis result of this method and pyrolysis analysis result, the result of core analysis of oil reservoir oil saturation
Unanimously, the reality that can reflect analyzed oil reservoir, the phenomenon that avoiding a variety of explanations of same oil reservoir, can be with preliminary assessment waterflooding extraction
Oilfield water flooding development effectiveness determines the remaining oil distribution of oil reservoir, for mainly tap the latent power direction and the technology of clear oil field development adjustment
Method establishes solid foundation.
Specific embodiment
Embodiment 1:
A kind of waterflooding reservoir oil-reservoir water oil displacement efficiency sentences knowledge method, includes the following steps:
Step 1: rock sample processing
It receives standby survey after rock sample product and checks quantity and rock sample label according to rock sample inventory, edit and record test sample after confirmation
Number is ready for nuclear-magnetism test；
Step 2: instrument prepares
1., correctly setting and conditioning instrumentation measurement parameter: by running under test equipment open state, 5 hours progress equipment is pre-
Heat, performance are adjusted and set test parameter with the standard sample of porosity 27% after stablizing；
2., instrument calibration, generate calibration file: with 10 measurement nuclear magnetic signals of standard sample of porosity 1%~27%, giving birth to
File is calibrated at detection.
3., the measurement of crude oil correction factor: measure nuclear magnetic signal with the dewatered oil of tested core sample block, convert crude oil
Correction factor；
Step 3: rock sample reset condition Nuclear Magnetic Resonance Measurement
1., with micro- wet filter paper remove rock sample surface water；
2., Nuclear Magnetic Resonance Measurement, measure porosity, permeability, mobile water saturation, irreducible water saturation quadrinomial parameter；
Step 4: doing rock core flood pot test under formation temperature, pressure condition, obtains irreducible water saturation, original contains
Three oily saturation degree, residual oil saturation parameters, and corresponding oil saturation is tested with nuclear magnetic resonance rock analyzer simultaneously；
Step 5: correction oil saturation
According to the measurement result in step 3, the core sample of different permeabilities and porosity, comparative analysis step are tested
The oil saturation of initial oil saturation and the test of nuclear magnetic resonance rock analyzer in four, loses reservoir oil saturation
Amount is restored, and correction imbibition acts on the influence tested oil saturation, the oil-containing saturation of institute's testing rock core after being corrected
Degree；
Step 6: by the oil saturation of institute's testing rock core, the irreducible water saturation of saturation state, the original of rock core after correcting
The oil-water displacement efficiency of beginning oil saturation calculating institute's testing rock core；
Step 7: it according to permeability obtained in step 3, chooses different permeability and its mean permeability and oil reservoir seeps
Saturating five pieces or more equal rock cores of rate test respective oil-water displacement efficiency respectively, and taking the average value of measured result is the oil reservoir
Oil-water displacement efficiency.
Standby survey rock sample product weight demands core sample > 25g in the step one, landwaste sample > 5g are processed into diameter 3-
The rock sample particle of 10mm carries out nuclear-magnetism test；
Three parameters of irreducible water saturation, initial oil saturation, residual oil saturation in the step four pass through
Following procedure obtains.
Rock core flood pot test is done under formation temperature, pressure condition, test method is referring to People's Republic of China's petroleum
Gas Industry standard " oil-water relative permeability measuring method (cold store enclosure) SY5345-1999 ":
1., the saturation MnCl that is first 20000mg/l with manganese ion concentration2Water does oily expelling water experiment, it is full to obtain irreducible water
And degree, initial oil saturation, while the oil saturation is tested with nuclear magnetic resonance rock analyzer；
2. and then the MnCl for being 20000mg/l with manganese ion concentration2Water does water drive oil displacement test, obtains residual oil saturation
Degree, while the oil saturation is tested with nuclear magnetic resonance rock analyzer.
The oil-water displacement efficiency of rock core is calculate by the following formula in the step six,
This waterflooding reservoir oil-reservoir water oil displacement efficiency of the invention sentences knowledge method, analyzes result and oil reservoir oil-containing is full
Consistent with pyrolysis analysis result, the result of core analysis of degree, scene is according to inspection shaft oil-reservoir water Analysis of displacement efficiency achievement, selection
The low interval of oil-water displacement efficiency has carried out well formation testing pilot production, and perforating and fracturing open flow produces pure oil 15.6t, day oil-producing after bringing in daily
5~6t, aqueous less than 10%, field application result is consistent with indoor judgement result, achieves apparent effect.
The foregoing examples are only illustrative of the present invention, does not constitute the limitation to protection scope of the present invention, all
It is within being all belonged to the scope of protection of the present invention with the same or similar design of the present invention.
Claims (1)
1. a kind of waterflooding reservoir oil-reservoir water oil displacement efficiency sentences knowledge method, characterized by the following steps:
Step 1: rock sample processing
It receives standby survey after rock sample product and checks quantity and rock sample label according to rock sample inventory, test sample volume is edited and recorded after confirmation
Number, it is ready for nuclear-magnetism test；
Step 2: instrument prepares
Setting and conditioning instrumentation measurement parameter, instrument calibration generate calibration file, the measurement of crude oil correction factor；
Step 3: rock sample reset condition Nuclear Magnetic Resonance Measurement measures porosity, permeability, mobile water saturation, constraint water saturation
Spend quadrinomial parameter；
Step 4: doing rock core flood pot test under formation temperature, pressure condition, and it is full to obtain irreducible water saturation, initial oil
With three degree, residual oil saturation parameters, and corresponding oil saturation is tested with nuclear magnetic resonance rock analyzer simultaneously；
Step 5: correction oil saturation
According to the measurement result in step 3, the core sample of different permeabilities and porosity is tested, in comparative analysis step 4
Initial oil saturation and nuclear magnetic resonance rock analyzer test oil saturation, to reservoir oil saturation loss amount into
Row restores, and correction imbibition acts on the influence tested oil saturation, the oil saturation of institute's testing rock core after being corrected；
Step 6: contained by the oil saturation of institute's testing rock core, the irreducible water saturation of saturation state, the original of rock core after correcting
The oil-water displacement efficiency of oily saturation computation institute testing rock core；
Step 7: permeability obtained in foundation step 3, selection permeability difference and its mean permeability and reservoir permeability
Five pieces or more equal rock cores test respective oil-water displacement efficiency respectively, take measured result average value be the oil reservoir water drive
Oily efficiency；
Standby survey rock sample product weight demands core sample > 25g in the step one, landwaste sample > 5g are processed into diameter 3-10mm's
Rock sample particle carries out nuclear-magnetism test；
Instrument preparation in the step two mainly comprises the following processes:
1., correctly setting and conditioning instrumentation measurement parameter: progress equipment preheating in 5 hours will be run under test equipment open state,
Performance is adjusted and sets test parameter with the standard sample of porosity 27% after stablizing；
2., instrument calibration, generate calibration file: take standard sample measure nuclear magnetic signal, generate detection calibration file；
3., the measurement of crude oil correction factor: measure nuclear magnetic signal, conversion crude oil amendment with the dewatered oil of tested core sample block
Coefficient；
During the calibration file generated, the porosity of standard sample is 1%~27%, and the quantity of standard sample is 10；
Rock sample reset condition Nuclear Magnetic Resonance Measurement comprises the following processes in the step three:
1., with micro- wet filter paper remove rock sample surface water；
2., Nuclear Magnetic Resonance Measurement, measure porosity, permeability, mobile water saturation, irreducible water saturation quadrinomial parameter；
Three parameters of irreducible water saturation, initial oil saturation, residual oil saturation in the step four pass through following
Process obtains,
1., use MnCl first2 Water does oily expelling water experiment, obtains irreducible water saturation, initial oil saturation, while being total to nuclear-magnetism
Vibration rock sample analyzer tests the oil saturation；
2. and then using MnCl2 Water does water drive oil displacement test, obtains residual oil saturation, while with nuclear magnetic resonance rock analyzer
Test the oil saturation；
The MnCl done in oily expelling water experiment and water drive oil displacement test2 The saturation for being 20000mg/l for manganese ion concentration
MnCl2 Water；
This method is suitable for the low-permeability oil deposit of waterflooding extraction, Reservoir Permeability 1~50 × 10-3 um2, reservoir temperature is not higher than 70
DEG C, formation water salinity is lower than 100000mg/L, and oil viscosity is lower than the oil reservoir of 10mPa .s.
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| CN107656903B (en) * | 2017-08-23 | 2021-04-30 | 中国石油天然气股份有限公司 | Geological exploration method and device |
| CN108827999B (en) * | 2018-06-25 | 2021-03-19 | 成都北方石油勘探开发技术有限公司 | Method for evaluating movable oil proportion and movable oil resource amount of low-pore-permeability sandstone reservoir |
| CN109709131A (en) * | 2018-11-20 | 2019-05-03 | 中国石油天然气股份有限公司 | Compact oil core huff-puff experimental method, device and system |
| CN110231268B (en) * | 2019-05-31 | 2022-07-22 | 大庆油田有限责任公司 | Method for analyzing oil-water occurrence pore size distribution of rock of tight reservoir |
| CN110261274B (en) * | 2019-06-06 | 2021-10-26 | 西安石油大学 | Evaluation method for static contribution rate of spontaneous imbibition effect on water flooding oil displacement efficiency |
| CN111520117B (en) * | 2020-06-24 | 2022-04-22 | 陕西延长石油（集团）有限责任公司 | Bottom water injection method and verification suitable for shallow layer horizontal seam oil reservoir |
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