CN110005399A - A kind of experimental method of the retrograde gas condensate of condensate gas containing excessive water cubing - Google Patents
A kind of experimental method of the retrograde gas condensate of condensate gas containing excessive water cubing Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 238000002474 experimental method Methods 0.000 title claims abstract description 17
- 239000007791 liquid phase Substances 0.000 claims abstract description 17
- 238000009833 condensation Methods 0.000 claims abstract description 11
- 230000005494 condensation Effects 0.000 claims abstract description 11
- 238000004587 chromatography analysis Methods 0.000 claims description 3
- 229920006395 saturated elastomer Polymers 0.000 claims description 2
- 239000007788 liquid Substances 0.000 description 6
- 239000012071 phase Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
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- 238000012360 testing method Methods 0.000 description 2
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- 238000007670 refining Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention discloses a kind of experimental method of the retrograde gas condensate of condensate gas containing excessive water cubing, experimental result high reliablity.Step: in pressure P1, under temperature T, configure the condensate gas of saturation, and measure its water content xi%；PVT high pressure property analyzer is taken, it is V that volume is first added in the main cylinder of its PVTiwWater, then configured condensate gas is added in the main cylinder of PVT, guarantees that the temperature of condensate gas, pressure are constant, to make to contain excessive water in condensate gas；The condensate gas in the main cylinder of PVT is sufficiently stirred, by PVT high pressure property analyzer, measures the volume V of gas in the main cylinder of PVTgw；Condensate gas is discharged, until the main cylinder of PVT drops to pressure set points P2, read the volume V of liquid phase in the main cylinder of PVTwt, and measure the water content x% of condensate gas；Check in the value C of the water flooding compressed coefficientw, and calculate the volume V of water in liquid phasew；The volume V of water in liquid phase is subtracted with the volume of liquid phase in the main cylinder of PVTw, obtain the volume V for the oil that retrograde condensation goes outo。
Description
Technical field
The present invention relates to oil-gas field development technical fields, more particularly to a kind of retrograde gas condensate volume of condensate gas containing excessive water
The experimental method of measurement.
Background technique
During condensate gas is produced from subsurface to surface, the change of the phase that separate and dissolve from gas with condensate
Phenomena such as change, condensate purity is higher, and coming out from underground mining can simply be refined or even can be come into operation without refining, and is
A kind of classification highly studied；Meanwhile the retrograde condensation phenomenon of condensate gas is studied, guidance can also be generated to the exploitation of oil gas field
Meaning.Currently, researchers by many result of study summaries obtain the phase-state change of gas condensate reservoir containing water flooding rule and
Influence factor.2006, the scholars such as Shi Depei, Sun Lei study discovery: the condensation gas sample retrograde condensate liquid volume rich in aquosity was greater than nothing
Water-setting gassing sample, the recovery percent of reserves of condensed liquid is lower than water-free situation in the condensate gas containing vaporous water, and with pressure reduction, and two
The retrograde condensate liquid volume of group sample and the difference of condensed liquid recovery percent of reserves are increasing.2014, the scholars such as Tang Yong, Du Zhimin hair
Existing: condensation water content is higher and in exponential increase with pressure reduction in the higher gas of temperature.Water flooding, which exists, reveals gas condensate reservoir
Point pressure and maximum retrograde condensate liquid volume increase, this illustrates that water flooding exists and exacerbates retrograde condensation.It can be seen that high temperature and pressure is solidifying
Water flooding, which must be taken into consideration, in gassing hiding exists on phase and the possible influence of development process.However, research condensation containing water flooding
The rule of the phase Characteristics variation of gas reservoir need to be to fluid group typical in oil-gas reservoir when analyzing the content ratio variation of condensate
At and fluid between correlation simulated, and experiments have shown that condensation oil content is few in condensate gas, measure its content ratio
It is more difficult, cause entirely to test increase difficulty, that is, enables successfully to obtain experimental result, but be difficult to comment to its accuracy, reliability
It is fixed.When we accomplish accurately to measure the amount for the condensate being precipitated in condensate gas, we can be accurately obtained by experiment
The content of water flooding is how specifically to influence the exploitation of condensate gas, so that we can be to condensate gas original oil in place, day
Right gas and condensation oil recovery have more accurate budget, to the oil storage in stratum, gas-storing capacity during oil-gas field development
There is more readily apparent budget estimation, this will reduce the manpower waste and economic loss generated by budget error.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of retrograde gas condensate volumes of condensate gas containing excessive water
The experimental method of measurement, experimental result high reliablity.
The object of the present invention is achieved like this:
A kind of experimental method of the retrograde gas condensate of condensate gas containing excessive water cubing, comprising the following steps:
S1, in pressure P1, under temperature T, configure the condensate gas of saturation, and measure its water content xi%；
S2, PVT high pressure property analyzer is taken, water is first added in the main cylinder of its PVT, the volume that water is added is Viw, then will match
The condensate gas set is added in the main cylinder of PVT, and the volume of condensate gas is Vg, to make to contain excessive water in condensate gas, condensate gas is added
During guarantee condensate gas temperature, pressure it is constant；
S3, in pressure P1, under temperature T, the condensate gas in the main cylinder of PVT is sufficiently stirred, by PVT high pressure property analyzer,
Measure the volume V of gas in the main cylinder of PVTgw；
S4, the constancy of volume for keeping the main cylinder of PVT, release condensate gas, until the main cylinder of PVT drops to pressure set points P2, read
Out in the main cylinder of PVT liquid phase volume Vwt, and measure the water content x% of condensate gas；
S5, according to stratum hydraulic pressure contracting coefficient with the change curve of pressure, temperature, obtain the value C of the water flooding compressed coefficientw,
And calculate the volume V of water in liquid phasew, calculation is as follows:
Vgw=Vg× (x%-xi%)
It solves: Vw=[1-Cw(P1-P2)]×{Viw-Vg(x%-xi%)]；
S6, the volume V that water in liquid phase is subtracted with the volume of liquid phase in the main cylinder of PVTw, obtain the volume V for the oil that retrograde condensation goes out0,
Calculation formula are as follows:
V0=Vwt-Vw。
Preferably, in S1, enough water, condensate gas are added in high temperature and pressure sample device, saturation needed for configuration experiment is solidifying
Gassing.
Preferably, in S4, the water content of condensate gas in the main cylinder of PVT is measured by chromatography.
Preferably, temperature T is the temperature of gas condensate reservoir.
By adopting the above-described technical solution, the present invention solves, condensate liquid measure is few, and oil-water interfaces are unobvious, precipitation
The volume of condensate is difficult to the problem of measuring, and considers the compressibility and volatility of water, ensure that reality as far as possible
The reliability of test examination.
Specific embodiment
A kind of experimental method of the retrograde gas condensate of condensate gas containing excessive water cubing, comprising the following steps:
S1, in pressure P1, under temperature T, temperature T is the temperature of gas condensate reservoir.It is added in high temperature and pressure sample device enough
Water, condensate gas, be saturated condensate gas needed for configuration experiment, and measure its water content xi%；
S2, PVT high pressure property analyzer is taken, water is first added in the main cylinder of its PVT, the volume that water is added is Viw, then will match
The condensate gas set is added in the main cylinder of PVT, and the volume of condensate gas is Vg, to make to contain excessive water in condensate gas, condensate gas is added
During guarantee condensate gas temperature, pressure it is constant；
S3, in pressure P1, under temperature T, the condensate gas in the main cylinder of PVT is sufficiently stirred, by PVT high pressure property analyzer,
Measure the volume V of gas in the main cylinder of PVTgw；
S4, the constancy of volume for keeping the main cylinder of PVT, release condensate gas, until the main cylinder of PVT drops to pressure set points P2, read
Out in the main cylinder of PVT liquid phase volume Vwt, the water content x% of condensate gas in the main cylinder of PVT is measured by chromatography；
S5, according to stratum hydraulic pressure contracting coefficient with the change curve of pressure, temperature, obtain the value C of the water flooding compressed coefficientw,
And calculate the volume V of water in liquid phasew, calculation is as follows:
Vgw=Vg× (x%-xi%)
It solves: Vw=[1-Cw(P1-P2)]×[Viw-Vg(x%-xi%)]；
S6, the volume V that water in liquid phase is subtracted with the volume of liquid phase in the main cylinder of PVTw, obtain the volume V for the oil that retrograde condensation goes out0,
Calculation formula are as follows:
V0=Vwt-Vw。
Embodiment:
For Q67-2 well rich in saturation gaseous state aqueous systems phase Characteristics experiment, main cylinder total volume (constant volume) 200ml of PVT is real
Temperature 396.25k is tested, there is following experimental data:
Initial pressure P1The volume V for the water being added in the main cylinder of=47.8MPa, pvtiw=60.52ml, the volume V of gasg=
139.48ml, water content xi%=1.69994%,
When release gas, pressure is down to P2When=36Mpa, it is total to measure liquid phase by the water content x %=1.83321% of gas
Volume Vwt=63.148ml, checks in Cw=4.49 × 10-4,
According to above data, calculate
The volume V of condensate0=Vwt-Vw=63.148-60.014=3.134ml
Finally, it is stated that preferred embodiment above is only used to illustrate the technical scheme of the present invention and not to limit it, although logical
It crosses above preferred embodiment the present invention is described in detail, however, those skilled in the art should understand that, can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (4)
1. a kind of experimental method of the retrograde gas condensate of condensate gas containing excessive water cubing, which comprises the following steps:
S1, in pressure P1, under temperature T, configure the condensate gas of saturation, and measure its water content xi%；
S2, PVT high pressure property analyzer is taken, water is first added in the main cylinder of its PVT, the volume that water is added is Viw, then will be configured
Condensate gas is added in the main cylinder of PVT, and the volume of condensate gas is Vg, to make to contain excessive water in condensate gas, the mistake of condensate gas is added
Guarantee that temperature, the pressure of condensate gas are constant in journey；
S3, in pressure P1, under temperature T, the condensate gas in the main cylinder of PVT is sufficiently stirred, by PVT high pressure property analyzer, measures
The volume V of gas in the main cylinder of PVTgw；
S4, the constancy of volume for keeping the main cylinder of PVT, release condensate gas, until the main cylinder of PVT drops to pressure set points P2, read PVT
The volume V of liquid phase in main cylinderwt, and measure the water content x% of condensate gas；
S5, according to stratum hydraulic pressure contracting coefficient with the change curve of pressure, temperature, obtain the value C of the water flooding compressed coefficientw, and calculate
Out in liquid phase water volume Vw, calculation is as follows:
Vgw=Vg× (x%-xi%)
It solves: Vw=[1-Cw(P1-P2)]×[Viw-Vg(x%-xi%)]；
S6, the volume V that water in liquid phase is subtracted with the volume of liquid phase in the main cylinder of PVTw, obtain the volume V for the oil that retrograde condensation goes out0, calculate
Formula are as follows:
V0=Vwt-Vw。
2. a kind of experimental method of the retrograde gas condensate of condensate gas containing excessive water cubing according to claim 1, feature
It is, in S1, enough water, condensate gas is added in high temperature and pressure sample device, is saturated condensate gas needed for configuration experiment.
3. a kind of experimental method of the retrograde gas condensate of condensate gas containing excessive water cubing according to claim 1, feature
It is, in S4, the water content of condensate gas in the main cylinder of PVT is measured by chromatography.
4. a kind of experimental method of the retrograde gas condensate of condensate gas containing excessive water cubing according to claim 1, feature
It is, temperature T is the temperature of gas condensate reservoir.
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