CN109577966A - Using the method for tracer monitoring individual well residual oil saturation - Google Patents
Using the method for tracer monitoring individual well residual oil saturation Download PDFInfo
- Publication number
- CN109577966A CN109577966A CN201811444533.3A CN201811444533A CN109577966A CN 109577966 A CN109577966 A CN 109577966A CN 201811444533 A CN201811444533 A CN 201811444533A CN 109577966 A CN109577966 A CN 109577966A
- Authority
- CN
- China
- Prior art keywords
- tracer
- well
- reservoir
- oil
- concentration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000700 radioactive tracer Substances 0.000 title claims abstract description 147
- 238000000034 method Methods 0.000 title claims abstract description 53
- 238000012544 monitoring process Methods 0.000 title claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 claims abstract description 45
- 238000012360 testing method Methods 0.000 claims abstract description 40
- 239000007788 liquid Substances 0.000 claims abstract description 27
- 239000000243 solution Substances 0.000 claims abstract description 26
- 239000012530 fluid Substances 0.000 claims abstract description 25
- 238000005259 measurement Methods 0.000 claims abstract description 21
- 238000002347 injection Methods 0.000 claims abstract description 18
- 239000007924 injection Substances 0.000 claims abstract description 18
- 238000005070 sampling Methods 0.000 claims abstract description 17
- 239000011435 rock Substances 0.000 claims abstract description 16
- 238000001514 detection method Methods 0.000 claims abstract description 15
- 230000036632 reaction speed Effects 0.000 claims abstract description 14
- 238000013461 design Methods 0.000 claims abstract description 12
- 230000001141 propulsive effect Effects 0.000 claims abstract description 11
- 238000012216 screening Methods 0.000 claims abstract description 7
- 230000035945 sensitivity Effects 0.000 claims abstract description 6
- 239000003921 oil Substances 0.000 claims description 91
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 42
- 238000009826 distribution Methods 0.000 claims description 27
- 239000010410 layer Substances 0.000 claims description 18
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- 238000011084 recovery Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 239000010779 crude oil Substances 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000000605 extraction Methods 0.000 claims description 6
- 230000007062 hydrolysis Effects 0.000 claims description 6
- 238000006460 hydrolysis reaction Methods 0.000 claims description 6
- 239000011229 interlayer Substances 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 claims description 5
- 230000003068 static effect Effects 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 4
- 238000009825 accumulation Methods 0.000 claims description 3
- 238000013019 agitation Methods 0.000 claims description 3
- 238000011156 evaluation Methods 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 239000004519 grease Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 239000012263 liquid product Substances 0.000 claims description 3
- 230000009972 noncorrosive effect Effects 0.000 claims description 3
- 239000010865 sewage Substances 0.000 claims description 3
- 238000001228 spectrum Methods 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 238000004364 calculation method Methods 0.000 claims description 2
- 238000001179 sorption measurement Methods 0.000 claims description 2
- 238000005057 refrigeration Methods 0.000 claims 1
- 238000007405 data analysis Methods 0.000 abstract description 3
- 238000010206 sensitivity analysis Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 10
- 238000004088 simulation Methods 0.000 description 8
- 238000011161 development Methods 0.000 description 7
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 5
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 5
- 238000012856 packing Methods 0.000 description 5
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 5
- 230000009977 dual effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- LRHPLDYGYMQRHN-UHFFFAOYSA-N Butanol Natural products CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 3
- 239000008398 formation water Substances 0.000 description 3
- 239000003129 oil well Substances 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004817 gas chromatography Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000005481 NMR spectroscopy Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 125000005587 carbonate group Chemical group 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010931 ester hydrolysis Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000005417 food ingredient Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000005251 gamma ray Effects 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000005311 nuclear magnetism Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 235000013324 preserved food Nutrition 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000013139 quantization Methods 0.000 description 1
- 238000003904 radioactive pollution Methods 0.000 description 1
- 238000011160 research 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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/008—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by injection test; by analysing pressure variations in an injection or production test, e.g. for estimating the skin factor
-
- 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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
- E21B49/087—Well testing, e.g. testing for reservoir productivity or formation parameters
- E21B49/088—Well testing, e.g. testing for reservoir productivity or formation parameters combined with sampling
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
Using the method for tracer monitoring individual well residual oil saturation, comprising the following steps: (1) select preferably wait log well and layer to be measured；(2) tracer screening and indoor measurement are carried out according to single-well reservoir condition, wherein primary tracer is lipophilic, is not adsorbed by reservoir rock surface, stable secondary tracer can be generated according to the reaction speed of design；(3) measurement scope and closed-in time are designed；(4) on-the-spot test prepares；(5) successively injection reactor solution and rear propulsive liquid after start closing well, (6) drive a well back production when production fluid sampling, detection and record；(7) each tracer concentration and production fluid relation curve are made, foundation meets actual single-well reservoir characteristic model, explained with proprietary software to tracer output concentration, obtains individual well residual oil saturation.Monitoring range of the invention is wider, short implementation cycle, and simple process, tracer is environmental-friendly, parameter detecting high sensitivity, and data analysis is reliable, and Explanation Accuracy is high.
Description
Technical field
The invention belongs to oil field development fields, and in particular to a kind of side using tracer monitoring individual well residual oil saturation
Method.
Background technique
By for the first time and after second of oil recovery, being stranded in deep under ground there are also a large amount of petroleum cannot effectively be produced.
With the development of petroleum exploration and development, annual newfound petroleum-in-place is constantly being reduced, and the difficulty of exploration and development is increasingly
Greatly, newfound oil field is not enough to make up the old filed for taking over yield increasingly failure in other words, this just has research residual oil full
With the needs of degree, residual oil is no longer the end point values of WATER DISPLACEMENT CURVES at a kind of recovery ratio target.In failure oil reservoir
It carries out in secondary, tertiary oil recovery Potential Evaluation, residual oil saturation is a vital parameter.It measures and studies remnants
Oily saturation degree and its distribution are the bases for developing high water cut oil field.Remain in ground for still remaining after first and second time is recovered the oil
Under a considerable number of resource that does not produce, use technology and all feasible raising recovery ratio method of economy as early as possible, be one and have
The project of strategic importance.Whether the reserves size and distribution situation of residual oil carry out the screening of EOR method for an oil reservoir and have
The economic exploitation value has great importance, and embodies more practical reality for the measurement of residual oil within the scope of individual well and anticipates
Justice.The technology is grasped by external a few countries for a long time, and introduction implementation cost is high, and the present invention enters exploitation in Chinese a large amount of oil fields
It comes into being when water ratio in oil well is higher than 95% or more after middle and later periods, has filled up sky for the site technology application in China field
It is white, have a vast market application prospect.
The method of existing measurement residual oil mainly includes core sample method, log method, Interwell tracer method and well testing method
Deng.
It for core sample method, is widely used in oil field, mainly by carrying out coring in formation at target locations, in laboratory to rock
Residual oil in core is detected, detected value only representation rock core the case where, for oil reservoir core volume be it is very small
A part, representative poor, and the production middle and later periods can not carry out coring, residual oil is unknown.
It for log method, is widely used in oil field, sub-resistance, nuclear-magnetism, electromagnetism, neutron lifetime, C/O ratio, gamma
Ray, gravity etc..Wherein, resistivity logging is widely used, detection radius 0.61-15.85m, but poor accuracy；Nuclear magnetic resonance log
Oil saturation, detection radius 0.61m can be directly measured, and is only applicable to heavy oil；Electromagnetic logging then detects thickness only
0.05m；Neutron life time log then needs to inject different fluids several times and is tested, complex process, and detects depth and only have
0.18-0.61m；C/O ratio detection depth is increased slightly, and is 0.23m, but detection accuracy degree still in the industry cycle has dispute；Gamma is penetrated
Though clarity is good in the longitudinal direction for collimation method, detection depth is 0.05-0.1m, and precision is disputable, is surveyed especially in the presence of second
The radioactive pollution of pit shaft before well；Then there is the problems such as poor accuracy in gravity logging.
For Interwell tracer method, this method monitoring cycle is long, and the result of monitoring is mostly after some months or 1 year
As a result, poor in timeliness, explanation results often represent the feature between well, rather than near individual well, specific aim is poor.
It for well testing method, is widely used in oil field, but this method is mainly used for calculating the drainage area of single oil well, over the ground
Matter understanding requires height, there is a problem of Explanation Accuracy difference.
In conclusion at present with method detection range, range is fairly limited for entire individual well or oil reservoir, usually
< 0.61m is not able to satisfy nearly requirement of the well with true residual oil saturation degree of monitoring individual well, poor in timeliness completely, while detecting essence
Exactness is poor, and these methods are usually used in oil field development early stage, and the later period rarely has for individual well residual oil saturation scene in exploitation
The effective ways of test.
Summary of the invention
In view of the problems of the existing technology, tracer monitoring individual well residual oil saturation is used the present invention provides a kind of
Method, monitoring range is wider, short implementation cycle, simple process, and the chemical tracer screened is environmental-friendly, and environmental protection is without dirt
Dye, parameter detecting high sensitivity, data analysis is reliable, and Explanation Accuracy is high.
The technical solution adopted by the present invention is that:
Using the method for tracer monitoring individual well residual oil saturation, comprising the following steps:
(1) it selects preferably wait log well and layer to be measured
The oil reservoir to be measured selected is waterflooded reservoir, i.e., oily mobility is close to zero, and cementing quality will be got well, upper and lower interlayer
Packing work well, avoid infusing into reactor solution alter layer；It selects not carry out water injection test and water wait log well
Force the well split；It chooses wait log well and after layer to be measured, collect well section, thickness, porosity, temperature, static pressure, Liquid output, aqueous
The parameter data of amount, formation water salinity；
(2) tracer screening is measured with room parameter
1. the primary tracer screened is lipophilic tracer, in the distribution coefficient in grease between 2-11, according to oil
Hide temperature, pressure condition, using Oil Field degassed crude and water flooding, the Accurate Determining tracer in distribution coefficient measurement device
The distribution coefficient in crude oil and water flooding, calculation formula are as follows at the scene for agent:
In formula: Ki: tracer is in oily distribution coefficient mutually and in water phase；
Co: the tracer concentration being allocated in oily phase；
Cw: the tracer concentration being allocated in water phase；
2. primary tracer has not by the adsorbed characteristic in reservoir rock surface, and chemistry does not occur instead with rock surface
It answers；It is main that static and dynamic adsorption assessment is carried out in laboratory by live rock core or landwaste, it obtains and shows in a period of time
The variation of tracer concentration, the tracer concentration pre-post difference met the requirements before and after track agent is flowed or impregnated in rock core or landwaste
It is different to be no more than 5%；
3. primary tracer can generate expected stable secondary show according to the reaction speed of design under reservoir condition
Track agent, the secondary tracer must have the characteristic of hydrophilic not oleophylic, and distribution coefficient in the oil is 0, to guarantee in back production
The secondary tracer of this in journey can be separated with remaining primary tracer；Wherein, reaction speed is according to reservoir condition, by special
It is obtained with the reaction speed in Instrument measuring tracer at the scene water flooding；
4. need there are it is other than secondary tracer, in underground do not generate the tracer of absorption and reaction as balance tracer
Agent, for judging the progress and integrality of on-the-spot test, the stability for balancing tracer is consistent with primary tracer evaluation method；
5. primary tracer and the secondary tracer of generation are non-corrosive in output, without table in crude oil-sewage system
Face effect；
6. the detection sensitivity of primary tracer and secondary tracer in crude oil and water flooding reaches ppm (10-6) grade；
(3) measurement scope and closed-in time are designed
A, measurement scope, and then showing according to selection are determined according to the testing radius of equipment performance, appropriation budget and needs
The individual well residual oil saturation measurement range of track agent and determination is based on reservoir formation physical parameter, using material balance principle
Design reactor solution volume；Pusher liquid product is designed according still further to 2-4 times of reactor solution volume；
B, the closed-in time
Closing well after reactor solution and rear propulsive liquid is infused, the closed-in time calculates as follows:
In formula: βA: it is detained coefficient, is calculated by following formula:
Sor: the estimated value of oil reservoir residual oil saturation to be measured；
Ki: tracer is in oily distribution coefficient mutually and in water phase；
E: reaction speed；
ηA: the degree of hydrolysis of primary tracer used；
(4) on-the-spot test prepares
A, preparation to be logged well: well-flushing insulates layer to be measured, and guarantees that packer does not leak；
B, on-the-spot test equipment prepare: ground installation is reequiped, and to pump truck, Agitation Tank, waterwheel, high pressure line into
Row connection；
C, reactor solution and rear propulsive liquid are prepared according to component design；
(5) closing well since successively injecting after reactor solution and rear propulsive liquid oil pipe, pump pressure when injection are consistently lower than
Formation fracture pressure, injection rate are calculated by following formula:
(6) drive a well back production when production fluid sampling, detection and record
A, it is sampled after driving a well, sample point samples in working fluid close to well head, is sealed at once after sampling cold
Hiding, not less than the time required for 1% reactor solution volume of injection, the duration is 2-5 days for sampling interval；
B, drive a well the record of the synchronous measurement for carrying out Liquid output and relevant information when sampling, comprising: chromatograph analysis
Each tracer concentration, well opening time, sample time, sample number into spectrum, sampling interval time, Produced Liquid volume, rate of withdrawal, back production
Total time in stage, extraction the liquid percentage of moisture, fluid temperature, pH value, salinity, the appearance of sample；
(7) tracer concentration and accumulation production fluid relation curve are made, according to monitoring reservoir geologic character, foundation meets reality
The geological model on border, and tracer production curve is simulated with numerical simulation software, it is remaining to calculate individual well finally by fitting result
Oily saturation degree Sor, wherein residual oil saturation and tracer concentration relationship are as follows:
In formula: QaFor corresponding production fluid volume at the complete primary tracer concentration maximum value of unreacted；
QbFor corresponding production fluid volume at secondary tracer concentration maximum value；
Ki: tracer is in oily distribution coefficient mutually and in water phase.
Beneficial effects of the present invention:
Monitoring technology of the invention is detailed to the crude oil, water flooding and the source water progress component that monitor oil field or oil well
On analysis foundation, one or more chemical tracing agent materials are found out, test distribution coefficient of the tracer in crude oil and water flooding,
Reaction speed of the tracer under reservoir condition is tested, according to single-well reservoir geological conditions, the test half of equipment, funds, needs
Diameter designs tracer dosage, after carrying out reactor solution preparation at the scene, is injected by special equipment from well head or mining site injects, used
Afterwards propulsive liquid by tracer be pushed into stratum after, closing well after a certain period of time opening well and making production and from well head simultaneously carry out fluid continuous sampling,
By in time to sample treatment, purification after, in high resolution detection equipment to processing after sample carry out tracer concentration height
Speed detection, obtains dynamic tracer agent concentration curve, finally establishes single-well reservoir geological model, by proprietary computer software to inspection
It surveys dynamic tracer agent concentration parameter and carries out analysis interpretation, individual well residual oil saturation parameter is provided, is had the advantage that
(1) this monitoring technology can monitor the residual oil saturation near producing well within the scope of 3-30m, than routine monitoring technology
Monitoring range improve nearly 50 times；
(2) this monitoring technology on-the-spot test time only needs several days time, improves efficiency than Interwell tracer monitoring technology
10 times or more；
(3) this monitoring technology reduces by 50% or more compared to foreign same type technical costs, remarkable in economical benefits；
(4) tracer of this monitoring method screening is environmental-friendly, pollution-free, carries out Concentration Testing, speed using chromatography
Fastly, high sensitivity；
(5) data analysis is reliable, and the individual well numerical model of foundation utmostly reduces underground true form, Explanation Accuracy
Height can especially provide residual oil saturation variation before and after tertiary oil recovery reliable quantization comparison index in time and to High water cut
Rate producing well, which is administered, provides reliable data foundation in time.
Detailed description of the invention
Fig. 1 is single well chemical tracer test tracer concentration and production fluid magnitude relation schematic diagram；
Fig. 2 is reaction speed regression curve of tracer under the conditions of different salinity；
Fig. 3 is the back production curve profile comparison diagram (dual media simulation) of primary tracer and secondary tracer；
Fig. 4 is the back production curve profile figure (dual media simulation) for injecting water gauge injecting；
Fig. 5 is the back production curve profile figure (dual media simulation) for balancing tracer 1；
Fig. 6 is the back production curve profile figure (dual media simulation) for balancing tracer 2；
Fig. 7 is the back production curve profile figure (single medium drift simulation) of primary tracer；
Fig. 8 is the back production curve profile figure (single medium drift simulation) of secondary tracer；
Fig. 9 is material balance method sectional view；
Figure 10 is Interwell tracer method sectional view.
Specific embodiment
The invention will be further described with reference to embodiments.
Laboratory and field test by many years, we have investigated and are adapted on the basis of external similar technique
A set of method using tracer monitoring individual well residual oil saturation of Chinese oil field feature and site application conditions, including it is following
Step:
(1) it selects preferably wait log well and layer to be measured
1. selecting from lithology, unrestricted, sandstone, mud stone, limestone, carbonate rock can be with, but back production curve shape
It is different.
2. oil reservoir to be measured must be waterflooded reservoir, oily mobility is close to zero.
3. the cementing quality of layer to be measured will be got well, avoid infusing into reactor solution alter layer.
4. the packing of interlayer is critically important above and below layer to be measured.Firstly, interlayer is mud stone or limestone etc., packing effect is good
It is good, guarantee that the reactor solution of note oil inlet layer necessarily flows into layer to be measured；Secondly, interlayer will have certain thickness, if interlayer is very
Thin, packing effect cannot ensure.
5. cannot select to carry out the well of water injection test after a period of time wait log well, a large amount of water fillings can make the remnants of near wellbore
Fry dried food ingredients gives birth to irreversible variation, and soluble component is dissolved and takes away in the cleaning and crude oil due to water filling, all will lead to residual oil
Saturation degree reduces.
6. the well for selecting those Jing Guo hydraulic fracturing should be avoided.In the oil reservoir that pressure break is crossed, tracer liquid cannot be according to
Radial flowing, and the packing in vertical direction may also be destroyed, and these factors become the explanation of test result very
Difficulty, or even at all without method interpretation.
7. in addition to above-mentioned factors, it is also contemplated that test water water source, suitable oil production method, the hand for measuring back production liquid
Section, the method for processing Produced Liquid, the place for placing injection device etc., if it is at sea testing, these are all at essential condition.
After layer position to be measured is selected, to collect below in connection with parameter: well section, porosity, temperature, static pressure, produces liquid at thickness
Amount, water content, formation water salinity, these parameters will be applied when designing on-the-spot test and explaining test result.
(2) tracer screening is measured with room parameter
1. primary tracer is lipophilic tracer, in the distribution coefficient in grease between 2-11；
2. primary tracer has not by the adsorbed characteristic in reservoir rock surface, and chemistry does not occur instead with rock surface
It answers；
3. primary tracer can generate expected stable secondary show according to the reaction speed of design under reservoir condition
Track agent, the secondary tracer must have the characteristic of hydrophilic not oleophylic, and distribution coefficient in the oil is 0, to guarantee in back production
The secondary tracer of this in journey can be separated with remaining primary tracer；Wherein, reaction speed is according to reservoir condition, by special
It is obtained with the reaction speed in Instrument measuring tracer at the scene water flooding；
4. progress and tracer in order to judge on-the-spot test situations such as whether there is or not leakage or losses, need to there is secondary tracer
Material balance tracer in addition commonly uses two kinds of balance tracers for the sake of insurance；
5. primary tracer and the secondary tracer of generation are non-corrosive, without surface action in crude oil-sewage system；
(3) measurement scope and closed-in time are designed
A, measurement scope is determined according to the testing radius of equipment performance, appropriation budget and needs, and then combines showing for selection
The individual well residual oil saturation measurement range of track agent and determination is based on reservoir formation physical parameter, using material balance principle
Design reactor solution volume；Pusher liquid product is designed according still further to 2-4 times of reactor solution volume, sensitivity is best at this time；
B, the closed-in time
Closing well after reactor solution and rear propulsive liquid is infused, the length of closed-in time is calculated with the formula for calculating hydrolysis constant；
(4) on-the-spot test prepares
A, preparation to be logged well: well-flushing insulates layer to be measured, and guarantees that packer does not leak；
B, on-the-spot test equipment prepare: ground installation is reequiped, and to pump truck, Agitation Tank, waterwheel, high pressure line into
Row connection；
C, reactor solution and rear propulsive liquid are prepared according to component design, and reactor solution concentration is analyzed, guaranteed
There is enough concentration；
(5) closing well since successively injecting after reactor solution and rear propulsive liquid oil pipe, pump pressure when injection are consistently lower than
Formation fracture pressure；
(6) drive a well back production when production fluid sampling, detection and record
A, it is sampled after driving a well, sample point samples in working fluid close to well head, is sealed at once after sampling cold
Hiding, not less than the time required for 1% reactor solution volume of injection, the duration is 2-5 days for sampling interval；
B, drive a well the record of the synchronous measurement for carrying out Liquid output and relevant information when sampling, comprising: chromatograph analysis
Each tracer concentration, well opening time, sample time, sample number into spectrum, sampling interval time, Produced Liquid volume, rate of withdrawal, back production
Total time in stage, extraction the liquid percentage of moisture, fluid temperature, pH value, salinity, the appearance of sample；
(7) tracer concentration and accumulation production fluid magnitude relation curve (as shown in Figure 1) are made, in conjunction with live practical geology and
Characteristic parameter is produced, foundation meets actual individual well numerical model, and simulates tracer production curve with proprietary software, finally leads to
Over-fitting result calculates individual well residual oil saturation Sor。
According to the above method, certain oil field is selected to carry out field test, specific test process is as follows:
(1) oil field development background introduction
Certain oil field is porous carbonate reservoir, overall thickness 45m, average pore 4%, reserves 3270 × 104m3.Later period adopts
It is developed with water flooding regime, remaining oil 57%.Since, also there are a large amount of petroleum, plan conducts an experiment in reservoir, with assessment
The potentiality of further waterflooding development.Therefore it needs to residual oil saturation (Sor) there is accurate understanding, since porosity is low, well logging
Method cannot accurately measure residual oil saturation.Method of the invention is big with test scope, limitation is small, the period is short, accuracy
High feature selects this method to carry out the measurement of residual oil saturation, the well reservoir condition are as follows: reservoir temperature to oil field D2-A well
65 DEG C, pressure 12MPa, formation water salinity 177000ppm, porosity 4.9%.
(2) tracer is preferably measured with laboratory parameters
1) tracer is preferred
Screening criteria:
A, it is substantially soluble in water
B, low environment security risk
C, concentration in water can easily be measured with gas chromatography
D, to the minimum adsorbance of rock matrix
E, suitable hydrolysis rate (depending on reservoir temperature)
F, suitable distribution reaction (depending on residual oil saturation)
According to the reservoir temperature of D2-A well, each ester hydrolysis rate and distribution coefficient select methyl acetate to show as primary
Track agent, into stratum after hydrolysis generate secondary tracer methanol, selecting the n- propyl alcohol of non-distribution is balance tracer 1, distribution
I- butanol is balance tracer 2, and injection fluid is marked using i- propyl alcohol.
2) distribution coefficient and reaction rate of experimental determination methyl acetate
In laboratory using the reservoir condition of scene oil simulation D2-A well living, the distribution coefficient Ki of methyl acetate is determined,
The hydrolytic rate constant E under reservoir temperature is calculated using ester concentration as the function of time, measurement data is as shown in table 1:
The E and Ki of tracer measure table under 1 laboratory simulation D2-A well reservoir condition of table
(3) on-site parameters design and injection
1) test scope: about 6.2m.
2) injection slug design: being previously implanted the i- propyl alcohol that concentration is 0.49%, be blended in water pot, passes through annular space essence
The primary tracer methyl acetate 14.9m that the close accurate implantation concentration of pump is 2.36%3, 0.67% balance tracer 1n- propyl alcohol,
0.63% balance tracer 2i- butanol, total injection rate 52.3m3.Aqueous solution heating will be injected with steam truck at well head
To 65-68 DEG C, to avoid the variation of trial zone temperature.
3) live injection rate: 3.83m3/h。
4) closed-in time: 9.3d.
(4) opening well and making production and concentration monitor
After closing well 9.3d, the well is with 22m3The speed of/d produces 10d, adds up production 219m3Water extends manufacture cycle, to the greatest extent
It may voluminous tracer out.Concentration Testing is carried out to the tracer in back production liquid, the rate of extraction of tracer is 70% or so, such as
Table 2, testing result show that the quality of data is good, are successfully tested.
The rate of extraction tables of data of 2 on-site test tracer of table
| Fluid type | Tracer | The rate of extraction, % |
| Secondary tracer | Methanol | - |
| Primary tracer | Methyl acetate | 68.9 |
| Mark agent | I- propyl alcohol | 66.7 |
| Balance tracer 1 | N- propyl alcohol | 75.7 |
| Balance tracer 2 | I- butanol | 70.3 |
(5) monitoring result is explained
Oil reservoir is Carbonate Reservoir, in order to further clarify influence of each reservoir geologic character to explanation results, using 3
Kind method, uses special-purpose software to carry out the explanation of detectable concentration curve.
Double medium model method is fitted tracer back production concentration with production fluid volume relation curve such as Fig. 3-Fig. 6.
Single medium drift model method fitting tracer back production concentration is with production fluid volume relation curve such as Fig. 7, Fig. 8.
Material balance method draws relationship such as Fig. 9 of tracer reaction constant and residual oil saturation.
Tracer data are explained with three of the above modelling, as a result such as table 3.
Table 3D2-A well oil reservoir residual oil saturation interpretation results table
| Serial number | Means of interpretation | Sorw, % |
| 1 | Simulate fitting process -- double medium model | 35±3 |
| 2 | Simulate fitting process -- Dan Jiezhi drift model | 38±3 |
| 3 | Directly calculate -- material balance method | 34±3 |
Therefore 3 kinds of meanss of interpretation are combined, the residual oil saturation Sorw that the method for the present invention measures D2-A well is 34-38%,
The result and offset well core sample method, inter-well tracer test method test result compare (such as table 5), although test depth is different,
But measurement result is almost the same, illustrates the accuracy of test result of the present invention.
Table 5D2-A well oil reservoir residual oil saturation interpretation results contrast table
| Serial number | Test method | Sorw, % |
| 1 | The method of the present invention | 34-38 |
| 2 | Coring (inspection well near D2-A well) | 33 |
| 2 | Inter-well tracer test method (is tested) away from D2-A Jing64mChu | 35±2 |
(6) conclusion
Show that the well Water Flooding Layer residual oil saturation range exists by the monitoring to D2-A well oil reservoir residual oil saturation
Between 34%-38%, the Sorw differently explained is not much different, while the residual oil of offset well is measured with other methods
Saturation degree compares, and as a result unanimously, illustrates that the back production curve data of the present invention is good, the residual oil saturation value tool of monitoring
There is accuracy, obtaining Sorw distribution will be very useful to the reservoir management in oil field and raising recovery ratio aspect.The invention will be accurate
Assessment helps to optimize the maturity of reservoir water exploitation due to not knowing residual oil size bring risk.Single well chemical shows
The residual oil saturation result of track agent method monitoring also will be helpful to preferred, the front and back Contrast on effect that potentially improve recovery ratio method
And difference mentions, the selection in the pilot area of high recovery rate process.
Residual oil saturation of the present invention explains the high reason of accuracy, (see beneficial effect the characteristics of in addition to this method itself
Part) outside, the selection criteria and context of detection to tracer are resulted also from, is such as substantially soluble in water, can be very with gas chromatography
Concentration, the minimum adsorbance to rock matrix, suitable hydrolysis rate and distribution reaction etc. in water is easily determined.
Claims (1)
1. using the method for tracer monitoring individual well residual oil saturation, which comprises the following steps:
(1) it selects preferably wait log well and layer to be measured
The oil reservoir to be measured selected is waterflooded reservoir, i.e., oily mobility is close to zero, and cementing quality will be got well, the envelope of upper and lower interlayer
Every working well, avoid infusing into reactor solution alter layer；It selects not carry out water injection test and waterpower pressure wait log well
The well split；Choose wait log well with after layer to be measured, collect well section, thickness, porosity, temperature, static pressure, Liquid output, water content,
The parameter data of layer water salinity；
(2) tracer screening is measured with room parameter
1. the primary tracer screened is lipophilic tracer, in the distribution coefficient in grease between 2-11, according to oil reservoir temperature
Pressure condition is spent, using Oil Field degassed crude and water flooding, Accurate Determining tracer exists in distribution coefficient measurement device
Distribution coefficient in live crude oil and water flooding, calculation formula are as follows:
In formula: Ki: tracer is in oily distribution coefficient mutually and in water phase；
Co: the tracer concentration being allocated in oily phase；
Cw: the tracer concentration being allocated in water phase；
It is not chemically reacted by the adsorbed characteristic in reservoir rock surface, and with rock surface 2. primary tracer has；
It is main that static and dynamic adsorption assessment is carried out in laboratory by live rock core or landwaste, obtain tracer in a period of time
The variation of tracer concentration before and after flowing or impregnate in rock core or landwaste, the tracer concentration front and back difference met the requirements is not
It should be more than 5%；
3. primary tracer can generate expected stable secondary tracer according to the reaction speed of design under reservoir condition
Agent, the secondary tracer must have the characteristic of hydrophilic not oleophylic, and distribution coefficient in the oil is 0, to guarantee in exploitation process
In the secondary tracer can be separated with remaining primary tracer；Wherein, reaction speed is according to reservoir condition, by dedicated
Reaction speed in water flooding obtains Instrument measuring tracer at the scene；
4. need there are it is other than secondary tracer, in underground do not generate the tracer of absorption and reaction as balance tracer,
For judging the progress and integrality of on-the-spot test, the stability for balancing tracer is consistent with primary tracer evaluation method；
5. primary tracer and the secondary tracer of generation are non-corrosive in output, make in crude oil-sewage system without surface
With；
6. the detection sensitivity of primary tracer and secondary tracer in crude oil and water flooding reaches ppm (10-6) grade.
(3) measurement scope and closed-in time are designed
A, measurement scope is determined according to the testing radius of equipment performance, appropriation budget and needs, and then according to the tracer of selection
And the individual well residual oil saturation measurement range determined, it is based on reservoir formation physical parameter, is designed using material balance principle
Reactor solution volume；Pusher liquid product is designed according still further to 2-4 times of reactor solution volume；
B, the closed-in time
Closing well after reactor solution and rear propulsive liquid is infused, the closed-in time calculates as follows:
In formula: βA: it is detained coefficient, is calculated by following formula:
Sor: the estimated value of oil reservoir residual oil saturation to be measured；
Ki: tracer is in oily distribution coefficient mutually and in water phase；
E: reaction speed；
ηA: the degree of hydrolysis of primary tracer used；
(4) on-the-spot test prepares
A, preparation to be logged well: well-flushing insulates layer to be measured, and guarantees that packer does not leak；
B, on-the-spot test equipment prepares: reequiping to ground installation, and connects to pump truck, Agitation Tank, waterwheel, high pressure line
It connects；
C, reactor solution and rear propulsive liquid are prepared according to component design；
(5) closing well since successively injecting after reactor solution and rear propulsive liquid oil pipe, pump pressure when injection are consistently lower than stratum
Fracture pressure, injection rate are calculated by following formula:
(6) drive a well back production when production fluid sampling, detection and record
A, it being sampled after driving a well, sample point samples in working fluid close to well head, refrigeration is sealed after sampling at once,
Not less than the time required for 1% reactor solution volume of injection, the duration is 2-5 days for sampling interval；
B, drive a well the record of the synchronous measurement for carrying out Liquid output and relevant information when sampling, comprising: chromatograph analysis is respectively shown
Track agent concentration, well opening time, sample time, sample number into spectrum, sampling interval time, Produced Liquid volume, rate of withdrawal, recovery phase
Total time, extraction the liquid percentage of moisture, fluid temperature, pH value, salinity, the appearance of sample；
(7) tracer concentration and accumulation production fluid relation curve are made, in conjunction with the practical geology in scene and production characteristic parameter, is established
Individual well numerical model, and tracer production curve is simulated with numerical simulation software, it is remaining to calculate individual well finally by fitting result
Oily saturation degree Sor, wherein residual oil saturation and tracer concentration relationship are as follows:
In formula: QaFor corresponding production fluid volume at the complete primary tracer concentration maximum value of unreacted；
QbFor corresponding production fluid volume at secondary tracer concentration maximum value；
Ki: tracer is in oily distribution coefficient mutually and in water phase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811444533.3A CN109577966A (en) | 2018-11-29 | 2018-11-29 | Using the method for tracer monitoring individual well residual oil saturation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811444533.3A CN109577966A (en) | 2018-11-29 | 2018-11-29 | Using the method for tracer monitoring individual well residual oil saturation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109577966A true CN109577966A (en) | 2019-04-05 |
Family
ID=65925652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811444533.3A Pending CN109577966A (en) | 2018-11-29 | 2018-11-29 | Using the method for tracer monitoring individual well residual oil saturation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109577966A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110749642A (en) * | 2019-10-29 | 2020-02-04 | 中广核工程有限公司 | Tracer element concentration detection method for steam generator humidity measurement test |
| CN112632849A (en) * | 2020-12-12 | 2021-04-09 | 清华大学 | Mechanical seal state analysis method based on numerical model |
| CN114482986A (en) * | 2021-09-24 | 2022-05-13 | 中国海洋石油集团有限公司 | Method for monitoring oil saturation of each fractured section of horizontal well by using tracer |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1210271A (en) * | 1998-07-14 | 1999-03-10 | 辽河石油勘探局钻采工艺研究院 | Technology for isotopic tracing determination in well |
| CN1212319A (en) * | 1997-09-25 | 1999-03-31 | 辽河石油勘探局钻采工艺研究院 | Cross-borehole high-temp tracer technique of viscous crude field |
| CN1427269A (en) * | 2001-12-21 | 2003-07-02 | 中国石油天然气股份有限公司 | Method of detecting residual oil saturation using single well chemical tracer |
| CN1495439A (en) * | 2002-08-23 | 2004-05-12 | 中国原子能科学研究院 | Perturbation well-to-well tracing test method |
| CN101240706A (en) * | 2008-03-13 | 2008-08-13 | 西安石油大学 | Annular space logging process of neutron gamma-ray logging instrument for well gadolinium-injecting labelling |
| CN104514558A (en) * | 2013-10-07 | 2015-04-15 | 天津大港油田圣达科技有限公司 | Trace element detection method among wells |
| CN104514550A (en) * | 2013-10-07 | 2015-04-15 | 天津大港油田圣达科技有限公司 | Inter-well monitoring method for radioactive isotope |
| CN104514557A (en) * | 2013-10-07 | 2015-04-15 | 天津大港油田圣达科技有限公司 | Inter-well monitoring method for monitoring water sample |
| CN106996293A (en) * | 2017-05-23 | 2017-08-01 | 濮阳市易发化工有限公司 | Oil field trace matter detection monitoring technology |
| CN107989600A (en) * | 2017-12-13 | 2018-05-04 | 北京捷贝通石油技术有限公司 | A kind of water base trace chemistry tracer and the method for measuring water injection well inter well connectivity |
-
2018
- 2018-11-29 CN CN201811444533.3A patent/CN109577966A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1212319A (en) * | 1997-09-25 | 1999-03-31 | 辽河石油勘探局钻采工艺研究院 | Cross-borehole high-temp tracer technique of viscous crude field |
| CN1210271A (en) * | 1998-07-14 | 1999-03-10 | 辽河石油勘探局钻采工艺研究院 | Technology for isotopic tracing determination in well |
| CN1427269A (en) * | 2001-12-21 | 2003-07-02 | 中国石油天然气股份有限公司 | Method of detecting residual oil saturation using single well chemical tracer |
| CN1495439A (en) * | 2002-08-23 | 2004-05-12 | 中国原子能科学研究院 | Perturbation well-to-well tracing test method |
| CN101240706A (en) * | 2008-03-13 | 2008-08-13 | 西安石油大学 | Annular space logging process of neutron gamma-ray logging instrument for well gadolinium-injecting labelling |
| CN104514558A (en) * | 2013-10-07 | 2015-04-15 | 天津大港油田圣达科技有限公司 | Trace element detection method among wells |
| CN104514550A (en) * | 2013-10-07 | 2015-04-15 | 天津大港油田圣达科技有限公司 | Inter-well monitoring method for radioactive isotope |
| CN104514557A (en) * | 2013-10-07 | 2015-04-15 | 天津大港油田圣达科技有限公司 | Inter-well monitoring method for monitoring water sample |
| CN106996293A (en) * | 2017-05-23 | 2017-08-01 | 濮阳市易发化工有限公司 | Oil field trace matter detection monitoring technology |
| CN107989600A (en) * | 2017-12-13 | 2018-05-04 | 北京捷贝通石油技术有限公司 | A kind of water base trace chemistry tracer and the method for measuring water injection well inter well connectivity |
Non-Patent Citations (2)
| Title |
|---|
| 胡书勇: "单井化学示踪剂法测残余油饱和度数值模拟研究", 《中国优秀博硕士学位论文全文数据库（硕士） 工程科技I辑》 * |
| 裴连君: "单井化学示踪剂测残余油饱和度段塞解释模型", 《新疆石油地质》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110749642A (en) * | 2019-10-29 | 2020-02-04 | 中广核工程有限公司 | Tracer element concentration detection method for steam generator humidity measurement test |
| CN112632849A (en) * | 2020-12-12 | 2021-04-09 | 清华大学 | Mechanical seal state analysis method based on numerical model |
| CN114482986A (en) * | 2021-09-24 | 2022-05-13 | 中国海洋石油集团有限公司 | Method for monitoring oil saturation of each fractured section of horizontal well by using tracer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20200141215A1 (en) | Evaluating far field fracture complexity and optimizing fracture design in multi-well pad development | |
| CN106285646B (en) | Drilling well loss horizon recognition methods based on multi-information fusion | |
| US10253598B2 (en) | Diagnostic lateral wellbores and methods of use | |
| Taotao et al. | Characteristics of shale pores, fractal dimension and their controlling factors determined by nitrogen adsorption and mercury injection methods | |
| CN106522928B (en) | Well testing method for unstable pressure drop of well logging head by stopping pump after acidizing and fracturing | |
| CN104594889B (en) | A kind of Accurate Determining oil well remaining oil preserves the devices and methods therefor of position | |
| CN104379870A (en) | Method for determining a permeability or mobility of a radial flow response of a reservoir | |
| CN109577966A (en) | Using the method for tracer monitoring individual well residual oil saturation | |
| CN109386285A (en) | A kind of ultra-low permeability oil layer slurry compounding degree and its evaluation method of influence | |
| CN107237626A (en) | A kind of well bores the determination method for meeting solution cavity volume | |
| Kurtoglu et al. | Minidrillstem tests to characterize formation deliverability in the Bakken | |
| Kaijun et al. | Sparse well pattern and high-efficient development of metamorphic buried hills reservoirs in Bohai Sea area, China | |
| Jalali et al. | Mechanical, hydraulic and seismological behavior of crystalline rock as a response to hydraulic fracturing at the grimsel test site | |
| CA1069584A (en) | Measuring reservoir oil for saturation | |
| CN109899050A (en) | Form the bed gas reservoir fracturing process of complex fracture network | |
| Lloyd et al. | An integrated study of controls on solute transport in the Lincolnshire limestone | |
| CN109458175A (en) | The prediction technique of reservoir oil saturation under a kind of Overpressure Condition | |
| Zhang et al. | Experimental Investigation of Seepage Mechanism on Oil‐Water Two‐Phase Displacement in Fractured Tight Reservoir | |
| CN109869133A (en) | Exploitation experimental design method based on oil reservoir development difficult point principal contradiction break through direction | |
| RU2792463C1 (en) | Method for determining the proportion of mobile residual oil of mature production field | |
| Zhang et al. | Development, Application and Prospect of Comprehensive Logging Technology in Geothermal Drilling | |
| Andersson et al. | Site characterization in fractured crystalline rock | |
| Helgø | Reservoir simulation of measurements with an innovative tool to detect oil-water-contact | |
| Arseniy | APPLICATION OF TRACER TECHNOLOGY ON THE PRIRAZLOMNOYE OIL FIELD FOR IMPROVING THE FIELD PRODUCTION. | |
| CN116797397A (en) | Method and device for rapidly tracking dynamic oil-water interface of broken solution oil reservoir |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190405 |