CN104632158A - Oil well response stage dividing and distinguishing method under carbon dioxide miscible displacement condition - Google Patents
Oil well response stage dividing and distinguishing method under carbon dioxide miscible displacement condition Download PDFInfo
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- CN104632158A CN104632158A CN201310571568.4A CN201310571568A CN104632158A CN 104632158 A CN104632158 A CN 104632158A CN 201310571568 A CN201310571568 A CN 201310571568A CN 104632158 A CN104632158 A CN 104632158A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/164—Injecting CO2 or carbonated water
Abstract
The invention provides an oil well response stage dividing and distinguishing method under a carbon dioxide miscible displacement condition. The method comprises the steps that original carbon dioxide content Ci and original solution gas-oil ratio Rt of an oil reservoir and carbon dioxide solubility Ri under different pressure P conditions are obtained; the static pressure Px of the stratum where an oil well is located is obtained through a pressure recovery curve; the production gas oil ratio Rx and the well mouth carbon dioxide content Cx recently are monitored; the changing situation of daily output recently is analyzed; an oil well response stage dividing standard under the condition of the static pressure Px of the stratum where the oil well is located is established; the well mouth carbon dioxide content Cx, the production gas oil ratio Rx and the output changing situation are compared with the oil well response stage dividing standard to judge the current response stage of the oil well. The method is closely combined with production practice, emphasizes the objectivity and overcomes subjectivity, the scientificity is enhanced remarkably, operation procedures are clear and reasonable, and a firm theoretical basis is laid for reservoir engineering analysis and site dynamic regulation.
Description
Technical field
The present invention relates to reservoir performance analysis research field, particularly relate to a kind of carbon dioxide mixed phase and to drive under condition oil well by effect divided stages and method of discrimination.
Background technology
Current carbon dioxide mixed phase drives technology and has obviously advantage as in the extra-low permeability oil reservoirs exploitation improving one of recovery efficiency technique and to be particularly difficult at low-permeability oil deposit waterflooding extraction, a large amount of indoor theory research and the practice of Water Alternate Gas mining site are carried out to the carbon dioxide mixed phase technology of driving both at home and abroad, but for oil well under driving effect at carbon dioxide mixed phase by effect feature and how to divide by the effect stage and also do not carry out systematic research, and the reservoir engineering method of routine and experience strong for the oil well production feature subjectivity under gas drive condition, lack clear and definite, reliably, the operating procedure of science, in daily production management process, there is no a set of effective method of discrimination to see clearly that oil well is subject to effect feature and residing by effect stage and Production trend simultaneously yet, this just causes hiding blindness in engineering research and production management process and not scientific carrying out the carbon dioxide miscible displacement of reservoir.We have invented a kind of new carbon dioxide mixed phase to drive oil well under condition and, by effect divided stages and method of discrimination, solve above technical problem for this reason.
Summary of the invention
The object of this invention is to provide a kind of carbon dioxide mixed phase and to drive under condition oil well by effect divided stages and sentence method for distinguishing PCCGP, effectively identify any a bite carbon dioxide mixed phase drive condition under oil well by the new method of imitating residing stage and following Production development trend.
Object of the present invention realizes by following technical measures: under carbon dioxide mixed phase drives condition, oil well is by effect divided stages and method of discrimination, under this carbon dioxide mixed phase drives condition, oil well comprises by effect divided stages and method of discrimination: step 1, asks for the original carbon dioxide content C of oil reservoir
iwith original dissolved gas oil ratio R
t, and the Solubilities of Carbon Dioxide R under different pressures P-condition
i; Step 2, asks for stratum, oil well place static pressure Px by pressure build-up curve; Step 3, monitors nearly a period of time production gas-oil ratio Rx and well head carbon dioxide content Cx; Step 4, analyzes the day degree change of production situation of nearly a period of time; Step 5, sets up stratum, oil well place static pressure P
xoil well under condition is by effect divided stages standard; And step 6, by well head carbon dioxide content C
x, production gas-oil ratio R
xand change of production situation and oil well are by imitate divided stages Comparison of standards, judge to be subject to the effect stage residing for oil well at present.
Object of the present invention also realizes by following technical measures:
In step 1, original dissolved gas oil ratio R
tdesign formulas be:
R
t=V
gρo/W
o
Wherein, V
gfor deviating from the volume of gas under the status of criterion from crude oil, ρ
ofor degassed rear oil density, W
ofor degassed rear crude quality.
In step 1, the original carbon dioxide content C of oil reservoir
idesign formulas be:
C
i=V
c1/V
g
Wherein, V
c1for at V
gin the CO that detects
2volume content.
In step 1, CO is passed through
2test with crude oil system saturation pressure and ask for CO under different pressures condition
2maxima solubility R in crude oil
i.
In step 2, the straightway of pressure build-up curve also referred to as He Nuo is extended to
intersect, intersection point corresponding pressure is stratum, oil well place static pressure Px, wherein, and t
pfor the oil well constant rate of production production time, Δ t is the closed-in time.
In step 3, when monitoring production gas-oil ratio Rx, after crude oil is flowed out by well head, crude oil is separated with solution gas, the solution gas gas volume deviate from by every day in flow meter metering oil tank and the crude oil volume produced, ratio between two is the production gas-oil ratio Rx of every day.
In step 3, when monitoring well head carbon dioxide content Cx, being got the solution gas sample volume Vx deviate from by sampler, utilizing gas chromatograph to detect sample in laboratory, the CO detected
2volume content Vcx, well head carbon dioxide content Cx=Vcx/Vx.
In step 4, effect divided stages is subject to by oil well to be not by the effect stage, by the effect elasticity section of driving, mixed phase section stage, nearly has channeling stage and has channeling stage.
Be not that oil well is not by CO by the effect stage
2drive impact to be still in pure elasticity and to drive state, C
x≈ C
i, R
x≈ R
t, production gas-oil ratio Rx and well head carbon dioxide content Cx two parametric characteristics are all stable, and output shows as elasticity and successively decreases.
The effect elasticity section of driving is subject to be that oil well is by CO
2drive impact, show as energy and recover, gas displacement front not yet arrives shaft bottom; C
x≈ C
i, R
x≈ R
t, production gas-oil ratio Rx and well head carbon dioxide content Cx two parametric characteristics are all stable, and output shows as to successively decrease and slows down or start to occur the surely section of increasing;
The mixed phase section stage is that miscible bank leading edge starts to arrive shaft bottom; C
i" C
x" R
i/ (R
t+ R
i)/2, R
t" R
i" (R
t+ R
i)/2, production gas-oil ratio Rx and well head carbon dioxide content Cx two parametric characteristics are all very fast increasing, and output shows as significantly the surely section of increasing.
The nearly has channeling stage is that miscible bank trailing edge is close to shaft bottom; R
i/ R
i/ (R
t+ R
i)/2 " C
i" R
x/ (R
t+ R
i), (R
t+ R
i)/2 " R
t" R
i" (R
t+ R
i)/2, production gas-oil ratio Rx and well head carbon dioxide content Cx two parametric characteristics are all increase fast, and output shows as significantly successively decreases or fluctuate.
The has channeling stage is supercritical CO
2band arrives shaft bottom, R
i/ (R
t+ R
i) <C
i, (R
t+ R
i) <R
t, production gas-oil ratio Rx and well head carbon dioxide content Cx two parametric characteristics show as and maintain high level (level) fluctuation; Yield characteristics shows as higher than successively decreasing or fluctuating not by the effect stage.
Under carbon dioxide mixed phase in the present invention drives condition, oil well is by effect divided stages and method of discrimination, under driving condition to oil field carbon dioxide mixed phase, oil well is by effect status analysis, provides a kind of oil well by imitating divided stages and sentencing method for distinguishing PCCGP comprehensive distinguishing method (Pressure-CO
2content-GOR-Production), under effectively any a bite carbon dioxide mixed phase of identification drives condition, oil well is imitated residing stage and following Production development trend.Compared with empirical method in the past, new method closely combines and produces reality, emphasizes objectivity, overcomes subjectivity, and science obviously strengthens, and operating procedure clear and rational.Apply during of the present invention one oil well specifically implemented is analyzed by effect and obtain remarkable result, according to the above criteria for classifying, in 19 mouthfuls of producing wells, 8 mouthfuls of wells (containing peripheral 5 mouthfuls of wells) are not imitated, 9 mouthfuls of wells are in and drive the stage by effect elasticity, drive stage or nearly has channeling stage by effect mixed phase, 2 mouthfuls of wells are gassed-out well, but degree is lighter.Thus established solid theoretical foundation for the dynamic adaptation at reservoir engineering analysis and scene.
Accompanying drawing explanation
Fig. 1 is that carbon dioxide mixed phase of the present invention drives the flow chart by a specific embodiment of effect divided stages and method of discrimination of oil well under condition;
Fig. 2 is pure 17-1 block Solubilities of Carbon Dioxide and pressure dependence figure in a specific embodiment of the present invention;
Fig. 3 is that in a specific embodiment of the present invention, pure 17-1 block representative center is subject to effect oil well day degree production curve.
Detailed description of the invention
For making above and other object of the present invention, feature and advantage can become apparent, cited below particularly go out preferred embodiment, and coordinate institute's accompanying drawings, be described in detail below.
Laboratory test shows, carbon dioxide solubility in crude oil raises along with pressure and raises, in a certain pressure P
xthe solubility of condition carbon dioxide in crude oil is R
x.Under theoretical condition, when reservoir pressure remains on certain level (higher than oil reservoir saturation pressure), the production gas-oil ratio of oil well and carbon dioxide content are certain: before at the bottom of carbon dioxide miscible bank leading edge breakthrough well, well head carbon dioxide content equals carbon dioxide content C in prime stratum
i, production gas-oil ratio equals primary Korean pine forest R
tgas displacement front enters mixed phase after breaking through and drives the stage, shaft bottom carbon dioxide content progressively increases, gas-oil ratio also progressively increases, along with miscible bank progressively terminates, oil well reaches the nearly has channeling stage, when not continuing to dissolve more carbon dioxide in crude oil again, carbon dioxide exists with free state form, will arrive shaft bottom fast and form has channeling.Production practices show, oil well is following several by change of production feature main manifestations when imitating: ascending-type, stable type, repeatedly lifting type (owing to adopting the impact of the factors such as correspondence, reservoir heterogeneity, well spacing otherness by has channeling, multidirectional note, output presents the feature that multisection type is by a small margin elevated repeatedly more).By analyze above formulate as shown in table 1 under carbon dioxide mixed phase drives condition when a certain pressure oil well by effect divided stages standard.
Under table 1 carbon dioxide mixed phase drives condition, oil well is imitated and is seen gas divided stages standard (P
xunder condition)
The oil well of this divided stages standard---i.e. our invention, by effect stage discretion method PCCGP comprehensive distinguishing method-" pressure-carbon dioxide content-production gas-oil ratio-output " method, can to drive under condition to any a bite carbon dioxide mixed phase that oil well is arbitrary to be differentiated by the effect stage.
As shown in Figure 1, Fig. 1 is that carbon dioxide mixed phase of the present invention drives the flow chart by a specific embodiment of effect divided stages and method of discrimination of oil well under condition.
In step 101, ask for the original carbon dioxide content C of oil reservoir
iwith original dissolved gas oil ratio R
t, and be determined by experiment the Solubilities of Carbon Dioxide R under different pressures P-condition
i.
Reservoir fluid high pressure property research bottom-hole sampling method: choose normal production well of just going into operation (in well well killing fluid and miscella drained), crude oil water containing is less than 2%.Sampling before measurement flowing pressure gradient, more than oil reservoir every 200, stop a bit, at least survey 3-5 point, according to barometric gradient conversion sample point place stream pressure, sample point pressure above bubble point pressure must be kept, be 1000-1200ml sampler with volume, sample number is no less than 4, sampler is put to sample point (in the middle part of oil reservoir) and fills crude oil to sampler, laboratory is sent in time after sealing sampler, in-place oil in sampler is proceeded in the PVT cylinder of laboratory, again reservoir pressure is pressurized to, in pressure process, constantly shake PVT cylinder or move up and down by magnetic stirrer in cylinder, gas is all evenly dissolved in oil, stable a period of time treats that pressure and temperature reaches equilibrium state, keep reservoir temperature, pressure condition, slightly open PVT cylinder valve, slowly enter pump, in PVT cylinder, release a small amount of oil sample enter eliminator separation, before draining the oil, in rear PVT cylinder, the difference of reading of oil sample volume is the subsurface volume Δ V releasing oil
f.The oil reservoir of releasing is separated through eliminator, gas volume V
g(status of criterion lower volume, m
3) measured by gas gauge; The volume of degassed rear crude oil is by degassed rear crude quality W
odivided by degassed crude density p
o(under 20 DEG C of conditions, t/m
3) obtain.Primary Korean pine forest Rt:
R
t=V
gρo/W
o
Utilize gas chromatograph to be V to volume in laboratory
gsolution gas detect, the CO that can detect
2volume content V
c1content in solution gas, the original carbon dioxide content C of oil reservoir
i=V
c1/ V
g
Pass through CO
2test with crude oil system saturation pressure and can ask for CO under different pressures condition
2maxima solubility R in crude oil
i: by the in-place oil sample prepared, (quality is W
o) keep single-phase and forward in high pressure P VT analyzer, at the formation temperature, inject CO
2gas, is forced into P
1, in pressure process, constantly shake PVT cylinder or move up and down by magnetic stirrer in cylinder, gas is all evenly dissolved in oil, until can not continue to dissolve CO
2till, injection rate is V1, stablizes a period of time arrival phase stable without free CO
2exist, CO under this pressure
2in crude oil, maxima solubility is R
1=V
1/ W
o, same method is forced into P
2, P
3p
8, maximum CO under measuring each pressure
2injection rate V
2, V
3v
8, calculate CO under each pressure
2in crude oil, maxima solubility is R
2, R
3r
8, R
ibe plotted on rectangular axes with corresponding pressure P and obtain CO
2the graph of a relation of solubility and pressure.Flow process enters into step 102.
In step 102, ask for stratum, oil well place static pressure Px by pressure build-up curve.
Pressure build-up curve method of testing: assuming that a bite well A is with constant rate of production q(m
3/ d) produce t
ph () time, then closing well carries out pressure buildup test (entering pressure gauge under shaft bottom), bottom pressure P after monitoring closing well
ws(Δ t) is from closing well Δ t(h) to (t
p+ Δ t) the bottom pressure changing value in moment, this value is the loose point value of a nearly straight line.According to theoretical He Nuo (Horner) formula:
P can be drawn on semilog coordinate axle
ws(Δ t) and
relation curve be obtained pressure build-up curve also referred to as He Nuo (Horner) curve, this curve is a straight line.The straightway of He Nuo (Horner) curve is extended to
intersect, intersection point corresponding pressure is called " extrapolated pressure " P
x, just original formation pressure Pi is equaled for undeveloped reserves, representing current stratum static pressure for developing oil reservoir, being striked stratum static pressure Px.Flow process enters into step 103.
In step 103, record nearly a period of time (about three months) production gas-oil ratio Rx and well head carbon dioxide content monitoring Cx.
Monitoring production gas-oil ratio Rx: after crude oil is flowed out by well head, deviate from because pressure reduces solution gas, pass through gravitational differentiation, crude oil is separated with solution gas, the solution gas gas volume deviate from by (under the status of criterion) every day in flow meter metering oil tank and the crude oil volume produced, ratio between two is the production gas-oil ratio Rx of every day;
Monitoring well head carbon dioxide content Cx: got the solution gas sample volume Vx deviate from by sampler, utilize gas chromatograph to detect sample in laboratory, the CO that can detect
2volume content Vcx, well head carbon dioxide content Cx=Vcx/Vx.Flow process enters into step 104.
In step 104, analyze nearly (about three months) day degree change of production situation for a period of time.Flow process enters into step 105.
In step 105, set up P according to table 1
xoil well under condition is by effect divided stages standard.
Not by the effect stage: this stage oil well is not by CO
2drive impact pure elasticity of still coming in and going out and drive state, C
x≈ C
i, R
x≈ R
t, two parametric characteristics are all stable, and output shows as elasticity and successively decreases;
By the effect elasticity section of driving: this stage oil well is by CO
2drive impact, main manifestations is that energy recovers, and gas displacement front not yet arrives shaft bottom; C
x≈ C
i, R
x≈ R
t, two parametric characteristics are all stable, and output shows as to successively decrease and slows down or start to occur the surely section of increasing;
The mixed phase section stage: this stage miscible bank leading edge starts to arrive shaft bottom; C
i" C
x" R
i/ (R
t+ R
i)/2, R
t" R
i" (R
t+ R
i)/2, two parametric characteristics are all very fast increasing, and output shows as significantly the surely section of increasing;
The nearly has channeling stage: this stage miscible bank trailing edge is close to shaft bottom; R
i/ R
i/ (R
t+ R
i)/2 " C
i" R
x/ (R
t+ R
i), (R
t+ R
i)/2 " R
t" R
i" (R
t+ R
i)/2, two parametric characteristics are all increase fast, and output shows as significantly successively decreases or fluctuate;
The has channeling stage: this stage supercritical CO
2band arrives shaft bottom, R
i/ (R
t+ R
i) <C
i, (R
t+ R
i) <R
t, two parametric characteristics show as and maintain high level (level) fluctuation; Yield characteristics shows as higher than successively decreasing or fluctuating not by the effect stage.Flow process enters into step 106.
In step 106, C
x, R
xand change of production situation and Comparison of standards can judge that oil well is residing by the effect stage at present.Flow process terminates.
It should be explicitly made clear at this point, C
i, R
t, P ~ R
irelation curve is all the parameter that oil reservoir Working Out The Scheme is known, C
x, R
xbe general monitoring project in daily manufacturing process, therefore the acquisition ratio of above parameter is easier to, and P
xmonitoring be in the present invention, obtain the larger parameter of difficulty, if can ensure that a season monitors P
x, so judge that the confidence level by the effect stage of oil well is high by the present invention.
Fig. 2 is Solubilities of Carbon Dioxide and pressure dependence figure in a specific embodiment of the present invention.Can find out in Fig. 2, carbon dioxide solubility in crude oil raises along with pressure and increases, under 30MPa condition, and Solubilities of Carbon Dioxide 200m
3/ t.
Table 2 is that under in a specific embodiment of the present invention, carbon dioxide mixed phase drives condition, oil well is subject to effect divided stages standard, under 30MPa condition, and original carbon dioxide content 5%, primary Korean pine forest 50m
3/ t.
Under table 2 carbon dioxide mixed phase drives condition, oil well is by effect divided stages standard
Fig. 3 is that in a specific embodiment of the present invention, oil clot representative center is subject to effect oil well day degree production curve, oil clot representative center is in figure 3 by division effect oil well day degree production curve carried out by the effect stage, the oil well output being in nearly has channeling will be in and successively decrease and fluctuation tendency, obtain higher confidence level, demonstrate reasonability and the correctness in division stage.
Claims (10)
1. under carbon dioxide mixed phase drives condition, oil well is by effect divided stages and method of discrimination, it is characterized in that, under this carbon dioxide mixed phase drives condition, oil well comprises by effect divided stages and method of discrimination:
Step 1, asks for the original carbon dioxide content C of oil reservoir
iwith original dissolved gas oil ratio R
t, and the Solubilities of Carbon Dioxide R under different pressures P-condition
i;
Step 2, asks for stratum, oil well place static pressure Px by pressure build-up curve;
Step 3, monitors nearly a period of time production gas-oil ratio Rx and well head carbon dioxide content Cx;
Step 4, analyzes the day degree change of production situation of nearly a period of time;
Step 5, sets up stratum, oil well place static pressure P
xoil well under condition is by effect divided stages standard; And
Step 6, by well head carbon dioxide content C
x, production gas-oil ratio R
xand change of production situation and oil well are by imitate divided stages Comparison of standards, judge to be subject to the effect stage residing for oil well at present.
2. under carbon dioxide mixed phase according to claim 1 drives condition, oil well is by effect divided stages and method of discrimination, it is characterized in that, in step 1, and original dissolved gas oil ratio R
tdesign formulas be:
R
t=V
gρo/W
o
Wherein, V
gfor deviating from the volume of gas under the status of criterion from crude oil, ρ
ofor degassed rear oil density, W
ofor degassed rear crude quality.
3. under carbon dioxide mixed phase according to claim 2 drives condition, oil well is by effect divided stages and method of discrimination, it is characterized in that, in step 1, and the original carbon dioxide content C of oil reservoir
idesign formulas be:
C
i=V
c1/V
g
Wherein, V
c1for at V
gin the CO that detects
2volume content.
4. under carbon dioxide mixed phase according to claim 1 drives condition, oil well is by effect divided stages and method of discrimination, it is characterized in that, in step 1, passes through CO
2test with crude oil system saturation pressure and ask for CO under different pressures condition
2maxima solubility R in crude oil
i.
5. under carbon dioxide mixed phase according to claim 1 drives condition, oil well is by effect divided stages and method of discrimination, it is characterized in that, in step 2, is extended to by the straightway of pressure build-up curve also referred to as He Nuo
intersect, intersection point corresponding pressure is stratum, oil well place static pressure Px, wherein, and t
pfor the oil well constant rate of production production time, Δ t is the closed-in time.
6. under carbon dioxide mixed phase according to claim 1 drives condition, oil well is by effect divided stages and method of discrimination, it is characterized in that, in step 3, when monitoring production gas-oil ratio Rx, after crude oil is flowed out by well head, crude oil is separated with solution gas, and the solution gas gas volume deviate from by every day in flow meter metering oil tank and the crude oil volume produced, ratio between two is the production gas-oil ratio Rx of every day.
7. under carbon dioxide mixed phase according to claim 1 drives condition, oil well is by effect divided stages and method of discrimination, it is characterized in that, in step 3, when monitoring well head carbon dioxide content Cx, the solution gas sample volume Vx deviate from is got by sampler, gas chromatograph is utilized to detect sample in laboratory, the CO detected
2volume content Vcx, well head carbon dioxide content Cx=Vcx/Vx.
8. under carbon dioxide mixed phase according to claim 1 drives condition, oil well is by effect divided stages and method of discrimination, it is characterized in that, in step 4, effect divided stages is subject to by oil well to be not by the effect stage, by the effect elasticity section of driving, mixed phase section stage, nearly has channeling stage and has channeling stage.
9. wanting the carbon dioxide mixed phase described in 8 to drive oil well under condition according to right, by effect divided stages and method of discrimination, to it is characterized in that, is not that oil well is not subject to CO by the effect stage
2drive impact to be still in pure elasticity and to drive state, C
x≈ C
i, R
x≈ R
t, production gas-oil ratio Rx and well head carbon dioxide content Cx two parametric characteristics are all stable, and output shows as elasticity and successively decreases.
10. under wanting the carbon dioxide mixed phase described in 8 to drive condition according to right, oil well is by effect divided stages and method of discrimination, it is characterized in that, is that oil well is by CO by the effect elasticity section of driving
2drive impact, show as energy and recover, gas displacement front not yet arrives shaft bottom; C
x≈ C
i, R
x≈ R
t, production gas-oil ratio Rx and well head carbon dioxide content Cx two parametric characteristics are all stable, and output shows as to successively decrease and slows down or start to occur the surely section of increasing.
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| CN105116107A (en) * | 2015-07-31 | 2015-12-02 | 中国石油天然气股份有限公司 | Identification method for phase state of CO2 in ultra-low permeable homogeneous core on reservoir condition |
| CN106368673A (en) * | 2016-10-13 | 2017-02-01 | 中国石油化工股份有限公司 | Measuring method for water content and crude output of carbon dioxide flooding high water content oil reservoir producing well |
| CN108131127A (en) * | 2017-11-24 | 2018-06-08 | 中国石油天然气股份有限公司 | A kind of acquisition methods and device of the production gas-oil ratio in foam oil type extra heavy oil oil field |
| CN110778315A (en) * | 2018-07-27 | 2020-02-11 | 中国石油天然气股份有限公司 | Oil well shaft degassing diagnosis method |
| CN110778315B (en) * | 2018-07-27 | 2022-08-30 | 中国石油天然气股份有限公司 | Oil well shaft degassing diagnosis method |
| CN111508564A (en) * | 2020-06-18 | 2020-08-07 | 中国地震局地壳应力研究所 | Quantitative quartz H2O-CO2Theoretical model and method for hydrothermal fluid mineralization process of NaCl system |
| CN111508564B (en) * | 2020-06-18 | 2023-10-03 | 应急管理部国家自然灾害防治研究院 | Quantification of quartz H 2 O-CO 2 System and method for hydrothermal fluid ore-forming process of NaCl system |
| CN111810143A (en) * | 2020-08-19 | 2020-10-23 | 中国石油天然气股份有限公司 | Reservoir ternary combination flooding effect receiving section identification method and single well effect receiving degree discrimination method |
| CN111810143B (en) * | 2020-08-19 | 2023-05-12 | 中国石油天然气股份有限公司 | Reservoir ternary composite flooding effective section identification method and single well effective degree discrimination method |
| CN115247550A (en) * | 2021-04-27 | 2022-10-28 | 中国石油天然气股份有限公司 | Carbon dioxide oil displacement injection-production adjustment method |
| CN115247550B (en) * | 2021-04-27 | 2024-03-15 | 中国石油天然气股份有限公司 | Carbon dioxide flooding injection and production adjustment method |
| CN113863903A (en) * | 2021-09-23 | 2021-12-31 | 西安石油大学 | Quantitative division method for carbon dioxide flooding gas injection stage |
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