CN106934084A - Phase state fitting method for condensate gas reservoir with bottom oil - Google Patents
Phase state fitting method for condensate gas reservoir with bottom oil Download PDFInfo
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- CN106934084A CN106934084A CN201511021318.9A CN201511021318A CN106934084A CN 106934084 A CN106934084 A CN 106934084A CN 201511021318 A CN201511021318 A CN 201511021318A CN 106934084 A CN106934084 A CN 106934084A
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- 238000000034 method Methods 0.000 title claims abstract description 45
- 239000002199 base oil Substances 0.000 claims abstract description 125
- 230000005494 condensation Effects 0.000 claims description 5
- 238000009833 condensation Methods 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000003921 oil Substances 0.000 abstract description 33
- 230000008859 change Effects 0.000 abstract description 11
- 239000007788 liquid Substances 0.000 description 6
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 241000208340 Araliaceae Species 0.000 description 2
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 235000008434 ginseng Nutrition 0.000 description 2
- NNPPMTNAJDCUHE-UHFFFAOYSA-N isobutane Chemical compound CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 description 2
- QWTDNUCVQCZILF-UHFFFAOYSA-N isopentane Chemical compound CCC(C)C QWTDNUCVQCZILF-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- AFABGHUZZDYHJO-UHFFFAOYSA-N dimethyl butane Natural products CCCC(C)C AFABGHUZZDYHJO-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000001282 iso-butane Substances 0.000 description 1
- 235000013847 iso-butane Nutrition 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000341 volatile oil Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
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Abstract
The invention provides a phase state fitting method for a condensate gas reservoir with bottom oil, which comprises the following steps: respectively obtaining bottom oil and condensate gas from a gas reservoir, and respectively determining N in the bottom oil and the condensate gas2、CO2、C1、C2、C3、C4、C5、C6And C7+The molar content of (a); dividing quasi components according to each component of the bottom oil and the condensate gas, and determining N in the quasi components corresponding to the bottom oil2、CO2、C1O、C2O、C34O、C56O、C7O+Determining N in the pseudo-component corresponding to the condensate gas2、CO2、C1Q、C2Q、C34Q、C56Q、C7Q+According to the quasi-components, the quasi-components corresponding to the base oil and the condensate gasThe method provided by the invention solves the technical problem that the existing phase fitting method cannot accurately describe the phase change of the condensate gas reservoir with the bottom oil.
Description
Technical field
The present invention relates to a kind of oil gas field inter-state research technical field, more particularly to a kind of band base oil condensation
The phase state matching method of gas reservoir.
Background technology
Gas condensate reservoir is a kind of special, complicated gas reservoir, and Gas Condensate is on stratum in recovery process
In seepage flow along with complicated phase-state change, therefore, the phase Characteristics research of gas condensate reservoir is to efficient
Exploitation is significant with exploitation gas condensate field, and the phase Characteristics typically according to condensate gas can determine whether oil
The type of gas reservoir, the stratum retrograde condensation for calculating oil gas field reserves size and exhaustion formula exploitation gas condensate field
Oily loss amount, so as to provide foundation to determine reasonable development mode, improving condensation oil recovery.
At present, in the development process of gas condensate field, the survey of Oil and Gas System PVT phaseexperiments is relied primarily on
Examination, by phase state matching, the phase behavior for describing state equation matches with experimental data, Ran Houjie
Close etc. composition expansion, etc. hold exhaustion, separator test and dew-point pressure test etc. experimentation carry out respectively
Item PVT phase behavior simulations are calculated, and Hydrocarbon body is described eventually through P-T (pressure-temperature) phasors
The phase of system, but for band base oil gas condensate reservoir, existing PVT approximating methods condensate gas
PVT (pressure-volume-temperature) equation describes the phase-state change of whole gas reservoir, so causes condensate gas
The very big error (as Figure 1-Figure 2) of the phase state matching appearance of base oil in Tibetan, and the mistake of phase state matching
It is serious inclined that difference can cause the important results such as the base oil viscosity for calculating, density, gas-oil ratio and reserves all to occur
Difference, is that this correlative study is proposed with two sets of PVT equations so as to influence the accuracy of numerical simulation calculation
The gentle fluid phase state of oil is described respectively.
But when describing the gentle fluid phase state of oil respectively with two sets of PVT equations, under reset condition,
The description of the gentle two-phase of oil is all very accurate, but in actual production, is influenceed by Development and Production, base oil
Invade condensate gas area or condensate gas scurry into base oil area phenomenon it is very universal, at this moment, two sets of PVT
After the region of condensate gas is entered into regard to generating very big problem, i.e. base oil, the viscosity of base oil, density,
Bubble point pressure etc. there occurs violent change, the result accuracy reduction for finally calculating, therefore, two
Set PVT equations can not simultaneously accurately describe the phase-state change of base oil and condensate gas.
The content of the invention
The present invention provides a kind of phase state matching method with base oil gas condensate reservoir, solves existing phase state matching
Method cannot phase-state change of the accurate description with base oil gas condensate reservoir technical problem.
The present invention provides a kind of phase state matching method with base oil gas condensate reservoir, and methods described includes：
Obtain base oil and condensate gas respectively from gas reservoir, and determine the base oil and the condensate gas respectively
The molar content of each component, wherein, each component in the base oil and the condensate gas includes：N2、CO2、
C1、C2、C3、C4、C5、C6And C7+；
Each component according to the base oil and the condensate gas divides pseudocomponent, and the pseudocomponent includes：N2、
CO2、C1Q、C2Q、C34Q、C56Q、C7Q+、C1O、C2O、C34O、C56O、C7O+, and according to institute
The molar content for stating each component in base oil determines N in the corresponding pseudocomponent of the base oil2、CO2、C1O、C2O、
C34O、C56O、C7O+Molar content, wherein, C in the corresponding pseudocomponent of the base oil1Q、C2Q、C34Q、
C56Q、C7Q+Molar content be zero；Molar content according to each component in the condensate gas determines described solidifying
N in the corresponding pseudocomponent of gassing2、CO2、C1Q、C2Q、C34Q、C56Q、C7Q+Molar content, its
In, C in the corresponding pseudocomponent of the condensate gas1O、C2O、C34O、C56O、C7O+Molar content be zero；
Molar content according to the pseudocomponent and the base oil and the corresponding pseudocomponent of the condensate gas is to institute
Stating base oil and the condensate gas carries out phase state matching.
It is described to be obtained according to each component of the base oil and the condensate gas in the specific embodiment of the invention
Pseudocomponent, including：
Each component according to the base oil divides corresponding first pseudocomponent of the base oil, wherein described first
Pseudocomponent includes：N2、CO2、C1O、C2O、C3O、C4O、C5O、C6O、C7O+；
Each component according to the condensate gas divides corresponding second pseudocomponent of the condensate gas, wherein, institute
Stating the second pseudocomponent includes：N2、CO2、C1Q、C2Q、C3Q、C4Q、C5Q、C6Q、C7Q+；
3rd pseudocomponent, the 3rd plan group are obtained according to first pseudocomponent and second pseudocomponent
Dividing includes：N2、CO2、C1O、C2O、C3O、C4O、C5O、C6O、C7O+、C1Q、C2Q、C3Q、
C4Q、C5Q、C6Q、C7Q+；
3rd pseudocomponent is merged into the acquisition pseudocomponent：N2、CO2、C1Q、C2Q、C34Q、
C56Q、C7Q+、C1O、C2O、C34O、C56O、C7O+。
In the specific embodiment of the invention, the molar content according to each component in the base oil determines institute
State N in the corresponding pseudocomponent of base oil2、CO2、C1O、C2O、C34O、C56O、C7O+Molar content,
Including：
Molar content according to each component in base oil obtains first pseudocomponent：N2、CO2、C1O、C2O、
C3O、C4O、C5O、C6O、C7O+Molar content；
Molar content according to first pseudocomponent determines N in the corresponding pseudocomponent of the base oil2、CO2、
C1O、C2O、C34O、C56O、C7O+Molar content, wherein, the C34OMolar content be equal to institute
State C3OAnd C4OMolar content sum, the C56OMolar content be equal to the C5OAnd C6ORub
That content sum.
In the specific embodiment of the invention, described in the molar content determination according to each component in the condensate gas
N in the corresponding pseudocomponent of condensate gas2、CO2、C1Q、C2Q、C34Q、C56Q、C7Q+Molar content,
Including：
Molar content according to each component in condensate gas obtains second pseudocomponent：N2、CO2、C1Q、
C2Q、C3Q、C4Q、C5Q、C6Q、C7Q+Molar content；
Molar content according to second pseudocomponent determines N in the corresponding pseudocomponent of the condensate gas2、
CO2、C1Q、C2Q、C34Q、C56Q、C7Q+Molar content, wherein, the C34QMolar content
Equal to the C3QAnd C4QMolar content sum, the C56QMolar content be equal to the C5QWith
C6QMolar content sum.
It is described according to the pseudocomponent and the corresponding pseudocomponent of the base oil in the specific embodiment of the invention
Molar content phase state matching is carried out to the base oil, including：
Molar content according to the corresponding pseudocomponent of the base oil is calculated and obtains the corresponding pseudocomponent of the base oil
Critical parameters；
Critical parameters and molar content according to the corresponding pseudocomponent of the base oil carry out phase state matching.
It is described according to the pseudocomponent and the corresponding plan group of the condensate gas in the specific embodiment of the invention
The molar content divided carries out phase state matching to the condensate gas, including：
Molar content according to the corresponding pseudocomponent of the condensate gas is calculated and obtains the corresponding plan of the condensate gas
The critical parameters of component；
Critical parameters and molar content according to the corresponding pseudocomponent of the condensate gas carry out phase state matching.
In the specific embodiment of the invention, the critical parameters include：Critical-temperature, critical pressure, face
Boundary's compressibility factor, dissymmetry factor and critical size.
In the specific embodiment of the invention, the critical parameters of the pseudocomponent are calculated by mole method of average.
In the specific embodiment of the invention, the critical ginseng of the base oil or the corresponding pseudocomponent of the condensate gas
Number and molar content carry out pressure-volume-temperature PVT phase state matchings.
The phase state matching method with base oil gas condensate reservoir that the present invention is provided, by the base oil and described solidifying
The each component of gassing divides pseudocomponent, and the pseudocomponent includes：N2、CO2、C1Q、C2Q、C34Q、C56Q、
C7Q+、C1O、C2O、C34O、C56O、C7O+, and it is true according to the molar content of each component in the base oil
Determine N in the corresponding pseudocomponent of the base oil2、CO2、C1O、C2O、C34O、C56O、C7O+Mole contain
Amount, wherein, C in the corresponding pseudocomponent of the base oil1Q、C2Q、C34Q、C56Q、C7Q+Molar content
It is zero；Molar content according to each component in the condensate gas is determined in the corresponding pseudocomponent of the condensate gas
N2、CO2、C1Q、C2Q、C34Q、C56Q、C7Q+Molar content, wherein, condensate gas correspondence
Pseudocomponent in C1O、C2O、C34O、C56O、C7O+Molar content be zero, according to the pseudocomponent and
The molar content of the base oil and the corresponding pseudocomponent of the condensate gas is entered to the base oil and the condensate gas
Row phase state matching, improves the accuracy of base oil and Phase Behavior of Gas Condensate description, and the present invention changes existing plan
Component division methods, realize being fitted simultaneously with a set of PVT equations the phase-state change of base oil and condensate gas, this
The approximating method degree of accuracy for inventing offer is high, and error, being capable of accurate description base oil and condensate gas within 5%
Phase-state change.
Brief description of the drawings
Fig. 1 is the matched curve between the oil viscosity and pressure of existing method fitting；
Fig. 2 is the matched curve between the oil density and pressure of existing method fitting；
Fig. 3 is the matched curve between the oil density and pressure of present invention fitting；
Fig. 4 is the matched curve between the oil viscosity and pressure of present invention fitting；
Fig. 5 is the matched curve between the retrograde condensate liquid volume and pressure of present invention fitting.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with this hair
Accompanying drawing in bright embodiment, is clearly and completely described to the technical scheme in the embodiment of the present invention,
Obviously, described embodiment is a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained under the premise of creative work is not made
The every other embodiment for obtaining, belongs to the scope of protection of the invention.
In the present embodiment by taking certain gas reservoir as an example, the gas reservoir 3240~3340m of buried depth, oily well section is long
75.8~97.0m, sound state Information integration analysis confirms it is a gas condensate reservoir with base oil, original oil gas
Interface height above sea level is -1440m, and oil-water interfaces height above sea level is -1480m, reset pressure 39.4MPa.
In the present embodiment, when carrying out phase state matching to the band base oil gas condensate reservoir, comprise the following steps：
Step 1)：Obtain base oil and condensate gas respectively from gas reservoir, and determine the base oil and described respectively
The molar content of each component in condensate gas, wherein, each component in the base oil and the condensate gas includes：
N2、CO2、C1、C2、C3、C4、C5、C6And C7+；
In the present embodiment, especially by being sampled acquisition base oil and condensate gas at the top and bottom of gas reservoir
Sample, wherein, sampling result shows, top is condensate gas, and bottom is volatile oil, then respectively to solidifying
Gassing sample and base oil sample carry out the measure of component, in the present embodiment, the component in condensate gas and base oil
It is N2、CO2、C1、C2、C3、C4、C5、C6And C7+, wherein, C1、C2、C3、C4、
C5、C6Respectively methane, ethane, propane, butane, pentane, hexane, C7+For carbon number more than etc.
In 7 alkane, wherein, the measurement result such as table of the mole percent level of base oil and condensate gas each component
Shown in 1：
The molar content of each component in the condensate gas of the present invention of table 1 and base oil
As it can be seen from table 1 C4Including IC4(iso-butane) and NC4(normal butane), C5Including IC5
(isopentane) and NC5(pentane).
Step 2)：Each component according to the base oil and the condensate gas divides pseudocomponent, the pseudocomponent
Including：N2、CO2、C1Q、C2Q、C34Q、C56Q、C7Q+、C1O、C2O、C34O、C56O、C7O+。
In the present embodiment, the component according to base oil and condensate gas obtains pseudocomponent and is specially：
Each component according to the base oil divides corresponding first pseudocomponent of the base oil, wherein described first
Pseudocomponent includes：N2、CO2、C1O、C2O、C3O、C4O、C5O、C6O、C7O+；
Each component according to the condensate gas divides corresponding second pseudocomponent of the condensate gas, wherein, institute
Stating the second pseudocomponent includes：N2、CO2、C1Q、C2Q、C3Q、C4Q、C5Q、C6Q、C7Q+；
3rd pseudocomponent, the 3rd plan group are obtained according to first pseudocomponent and second pseudocomponent
Dividing includes：N2、CO2、C1O、C2O、C3O、C4O、C5O、C6O、C7O+、C1Q、C2Q、C3Q、
C4Q、C5Q、C6Q、C7Q+；
3rd pseudocomponent is merged into the acquisition pseudocomponent：N2、CO2、C1Q、C2Q、C34Q、
C56Q、C7Q+、C1O、C2O、C34O、C56O、C7O+。
In the present embodiment, the molar content according to the midsole oil ingredient of table 1 determine the pseudocomponent of base oil mole
Content and determine that the pseudocomponent of condensate gas mole contains according to the molar content of condensate gas component in table 1
Amount, specifically, for base oil, the molar content first according to each component in base oil obtains first and intends
Molar content (the i.e. N of component2、CO2、C1O、C2O、C3O、C4O、C5O、C6O、C7O+Mole
Content), in the present embodiment, molar content (the i.e. N of the first pseudocomponent2、CO2、C1O、C2O、C3O、
C4O、C5O、C6O、C7O+Molar content) molar content (N with each component of base oil2、CO2、
C1、C2、C3、C4、C5、C6、C7+Molar content) correspondent equal, therefore, base oil the 3rd plan
N in component2、CO2、C1O、C2O、C3O、C4O、C5O、C6O、C7O+Molar content it has been determined that
And remaining C in the 3rd pseudocomponent of base oil1Q、C2Q、C3Q、C4Q、C5Q、C6Q、C7Q+Component
Molar content is set to 0.
Accordingly, for condensate gas, the molar content first according to each component in condensate gas obtains the
Molar content (the i.e. N of two pseudocomponents2、CO2、C1Q、C2Q、C3Q、C4Q、C5Q、C6Q、C7Q+
Molar content), in the present embodiment, molar content (the i.e. N of the second pseudocomponent2、CO2、C1Q、C2Q、
C3Q、C4Q、C5Q、C6Q、C7Q+Molar content) molar content (condensation with each component of condensate gas
The N of gas2、CO2、C1、C2、C3、C4、C5、C6、C7+Molar content) correspondent equal, therefore,
N in 3rd pseudocomponent of condensate gas2、CO2、C1Q、C2Q、C3Q、C4Q、C5Q、C6Q、C7Q+
Molar content it has been determined that and remaining C in the pseudocomponent of condensate gas1O、C2O、C3O、C4O、C5O、
C6O、C7O+The molar content of component is set to 0, the molar content and condensate gas of the 3rd pseudocomponent of base oil
The 3rd pseudocomponent molar content it is as shown in table 2：
The pseudocomponent of the gas reservoir base oil of table 2 and condensate gas divides outcome table
Then, the pseudocomponent (i.e. the 3rd pseudocomponent) in table 2 is merged into acquisition pseudocomponent：N2、
CO2、C1Q、C2Q、C34Q、C56Q、C7Q+、C1O、C2O、C34O、C56O、C7O+, wherein, close
And when, C34OMolar content be equal to C3OAnd C4OMolar content sum, C56OMolar content be equal to
C5OAnd C6OMolar content sum, C34QMolar content be equal to C3QAnd C4QMolar content sum,
C56QMolar content be equal to C5QAnd C6QMolar content sum, the N in pseudocomponent2、CO2、C1Q、
C2Q、C7Q+、C1O、C2O、C7O+Molar content and table 2 in N2、CO2、C1Q、C2Q、C7Q+、
C1O、C2O、C7O+Molar content it is identical, wherein, the pseudocomponent and pseudocomponent of base oil are corresponding to rub
That percentage composition and molecular weight are as shown in table 3, corresponding mole hundred of the pseudocomponent and pseudocomponent of condensate gas
Divide content and molecular weight as shown in table 4.
From table 3 and table 4 as can be seen that C in base oil and condensate gas1、C2、C3、C4、C5、C6's
Mass difference is little, but C7+Mass difference in base oil and condensate gas is larger, C7+In base oil
In molecular weight be 225.3, C7+Molecular weight in condensate gas is 159.78.
The parameter list of the pseudocomponent of the base oil of table 3
The parameter list of the pseudocomponent of the condensate gas of table 4
Step 3)：According to the pseudocomponent and the base oil and the corresponding pseudocomponent of the condensate gas mole
Content carries out phase state matching to the base oil and the condensate gas.
In the present embodiment, during fitting base oil, first according to the molar content of the corresponding pseudocomponent of the base oil
The critical parameters for obtaining the corresponding pseudocomponent of the base oil are calculated, wherein the critical parameters of the base oil for calculating
As shown in table 5.During fitting condensate gas, first according to the molar content of the corresponding pseudocomponent of the condensate gas
The critical parameters for obtaining the corresponding pseudocomponent of the condensate gas are calculated, wherein the condensate gas for calculating is critical
Parameter is as shown in table 6, specific using a mole critical ginseng for the method for average each pseudocomponent of calculating in the present embodiment
Number.
The critical parameters table of the base oil of table 5
The critical parameters table of the condensate gas of table 6
Critical parameters and molar content according to being calculated in above-mentioned table 5 and table 6 carry out pressure-volume-temperature
(PVT) phase state matching, specifically in fitting, has been formed using phase behavior simulation analysis software Winprop
Whole PVT fitting data.
Wherein, for the ease of fitting Combination is contrasted with the result of measure in actual experiment, this implementation
In example, the base oil that gets and the sample of condensate gas are tested by differential separation, etc. appearance depletion experiments,
It is measured etc. related experiments such as component swells, wherein the experimental data of base oil as shown in table 7, is coagulated
The experimental result of gassing is as shown in table 8, the fitting result obtained when being fitted to base oil using the present invention
As shown in table 9 and Fig. 3-4, the fitting result obtained when being fitted to condensate gas using the present invention such as table
Shown in 10 and Fig. 5, Fig. 3 is the matched curve between the oil density and pressure of present invention fitting；Fig. 4 is
Matched curve between the oil viscosity and pressure of present invention fitting, Fig. 5 is the retrograde condensed liquid of present invention fitting
Matched curve between amount and pressure.
The base oil experimental data table of table 7
The condensate gas experimental data table of table 8
The fitting result table of the base oil Central Plains oil density of the present invention of table 9 and viscosity of crude
The fitting result table of retrograde condensed liquid volume in the condensate gas of the present invention of table 10
Find out from table 9 and Fig. 3-4, the error between the oil density fitting data and experimental data of base oil
Within 2%, the error between the oil viscosity fitting data and experimental data of base oil within 5%, from table
10 and Fig. 5 finds out that the error in condensate gas between the fitting data and experimental data of retrograde condensed liquid volume exists
Within 5%, the retrograde condensate liquid volume in wherein Fig. 5 is retrograde condensed liquid volume.
In the present embodiment, it is fitted using a set of PVT equations, it is necessary to illustrate, PVT equations are
Well known to a person skilled in the art state description equation, prior art is specifically may refer to, in the present embodiment
Repeat no more.
As a comparison, in the present embodiment, to step 1) determine base oil and condensate gas each component mole
Content is fitted according to the method for prior art, wherein, existing method is to base oil and condensate gas pseudocomponent
Division result is as shown in table 11：
The existing gas reservoir base oil of table 11 and condensate gas pseudocomponent divide outcome table
Existing pseudocomponent division is can be seen that from table 11 and table 2-3 to be deposited with pseudocomponent of the invention division
It is exactly by changing the method that existing components are divided, creating one kind and be directed in larger difference, the present invention
Phase state matching method with base oil gas condensate reservoir.
Pseudocomponent and corresponding molar content in table 11 are fitted to base oil and condensate gas, its
As shown in table 12 and Fig. 1-2, Fig. 1 is existing for the oil density of middle base oil and the fitting result of viscosity of crude
Matched curve between the oil viscosity and pressure of method fitting；Fig. 2 be existing method fitting oil density with
Matched curve between pressure.
The existing method of table 12 is to base oil Central Plains oil density and viscosity of crude fitting result table
From shown in table 12 and Fig. 1-2, existing method utilizes a set of PVT equation models base oil and condensate gas
Phase-state change when, the error between the oil density and viscosity of crude and experimental data of base oil exists
Between 18.01%~86.11%, and in the present invention, error is all within 5%, and the degree of accuracy is higher, no matter
There is has channeling or oil invaded, can accurate description its fluid properties, to fluid phase state accurate description,
It is of great significance for the distribution of prediction Remaining Oil And Gas and development plan establishment all tools, specifically, adopting
When being fitted with existing approximating method, when base oil or condensate gas is fitted, due in calculating process, C7+'s
Molecular weight can only be using a value, but C7+Mass difference in base oil and condensate gas is larger, therefore
In fit procedure, fitting data occurs in that larger error, and in the present invention, when pseudocomponent is divided,
Include C7Q+And C7O+, when base oil is fitted, C7Q+Molar content be set to zero, during calculating, adopt
Use C7O+Molar content and molecular weight (225.3), be fitted condensate gas when, C7O+Molar content set
It is zero, during calculating, using C7Q+Molar content and molecular weight (159.78), so, in fit procedure,
Use different molecular weight so that fitting result is more accurate.
The phase state matching method with base oil gas condensate reservoir that the present invention is provided, is drawn by changing existing pseudocomponent
Divide method, realize being fitted simultaneously with a set of PVT equations the phase-state change of base oil and condensate gas, and this hair
The approximating method degree of accuracy of bright offer is high, and error is capable of accurate description base oil and condensate gas within 5%
Identical change.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than right
Its limitation；Although being described in detail to the present invention with reference to foregoing embodiments, this area it is common
Technical staff should be understood：It can still modify to the technical scheme described in foregoing embodiments,
Or equivalent is carried out to which part or all technical characteristic；And these modifications or replacement, and
The scope of the essence disengaging various embodiments of the present invention technical scheme of appropriate technical solution is not made.
Claims (9)
1. a kind of phase state matching method with base oil gas condensate reservoir, it is characterised in that methods described includes：
Obtain base oil and condensate gas respectively from gas reservoir, and determine the base oil and the condensate gas respectively
The molar content of each component, wherein, each component in the base oil and the condensate gas includes：N2、CO2、
C1、C2、C3、C4、C5、C6And C7+；
Each component according to the base oil and the condensate gas divides pseudocomponent, and the pseudocomponent includes：N2、
CO2、C1Q、C2Q、C34Q、C56Q、C7Q+、C1O、C2O、C34O、C56O、C7O+, and according to institute
The molar content for stating each component in base oil determines N in the corresponding pseudocomponent of the base oil2、CO2、C1O、C2O、
C34O、C56O、C7O+Molar content, wherein, C in the corresponding pseudocomponent of the base oil1Q、C2Q、C34Q、
C56Q、C7Q+Molar content be zero；Molar content according to each component in the condensate gas determines described solidifying
N in the corresponding pseudocomponent of gassing2、CO2、C1Q、C2Q、C34Q、C56Q、C7Q+Molar content, its
In, C in the corresponding pseudocomponent of the condensate gas1O、C2O、C34O、C56O、C7O+Molar content be zero；
Molar content according to the pseudocomponent and the base oil and the corresponding pseudocomponent of the condensate gas is to institute
Stating base oil and the condensate gas carries out phase state matching.
2. method according to claim 1, it is characterised in that described according to the base oil and described
The each component of condensate gas obtains pseudocomponent, including：
Each component according to the base oil divides corresponding first pseudocomponent of the base oil, wherein described first
Pseudocomponent includes：N2、CO2、C1O、C2O、C3O、C4O、C5O、C6O、C7O+；
Each component according to the condensate gas divides corresponding second pseudocomponent of the condensate gas, wherein, institute
Stating the second pseudocomponent includes：N2、CO2、C1Q、C2Q、C3Q、C4Q、C5Q、C6Q、C7Q+；
3rd pseudocomponent, the 3rd plan group are obtained according to first pseudocomponent and second pseudocomponent
Dividing includes：N2、CO2、C1O、C2O、C3O、C4O、C5O、C6O、C7O+、C1Q、C2Q、C3Q、
C4Q、C5Q、C6Q、C7Q+；
3rd pseudocomponent is merged into the acquisition pseudocomponent：N2、CO2、C1Q、C2Q、C34Q、
C56Q、C7Q+、C1O、C2O、C34O、C56O、C7O+。
3. method according to claim 2, it is characterised in that described according to each group in the base oil
The molar content divided determines N in the corresponding pseudocomponent of the base oil2、CO2、C1O、C2O、C34O、C56O、
C7O+Molar content, including：
Molar content according to each component in base oil obtains first pseudocomponent：N2、CO2、C1O、C2O、
C3O、C4O、C5O、C6O、C7O+Molar content；
Molar content according to first pseudocomponent determines N in the corresponding pseudocomponent of the base oil2、CO2、
C1O、C2O、C34O、C56O、C7O+Molar content, wherein, the C34OMolar content be equal to institute
State C3OAnd C4OMolar content sum, the C56OMolar content be equal to the C5OAnd C6ORub
That content sum.
4. method according to claim 2, it is characterised in that according to each component in the condensate gas
Molar content determine N in the corresponding pseudocomponent of the condensate gas2、CO2、C1Q、C2Q、C34Q、C56Q、
C7Q+Molar content, including：
Molar content according to each component in condensate gas obtains second pseudocomponent：N2、CO2、C1Q、
C2Q、C3Q、C4Q、C5Q、C6Q、C7Q+Molar content；
Molar content according to second pseudocomponent determines N in the corresponding pseudocomponent of the condensate gas2、
CO2、C1Q、C2Q、C34Q、C56Q、C7Q+Molar content, wherein, the C34QMolar content
Equal to the C3QAnd C4QMolar content sum, the C56QMolar content be equal to the C5QWith
C6QMolar content sum.
5. method according to claim 1, it is characterised in that described according to the pseudocomponent and institute
Stating the molar content of the corresponding pseudocomponent of base oil carries out phase state matching to the base oil, including：
Molar content according to the corresponding pseudocomponent of the base oil is calculated and obtains the corresponding pseudocomponent of the base oil
Critical parameters；
Critical parameters and molar content according to the corresponding pseudocomponent of the base oil carry out phase state matching.
6. method according to claim 1, it is characterised in that described according to the pseudocomponent and institute
Stating the molar content of the corresponding pseudocomponent of condensate gas carries out phase state matching to the condensate gas, including：
Molar content according to the corresponding pseudocomponent of the condensate gas is calculated and obtains the corresponding plan of the condensate gas
The critical parameters of component；
Critical parameters and molar content according to the corresponding pseudocomponent of the condensate gas carry out phase state matching.
7. the method according to claim 5 or 6, it is characterised in that the critical parameters include：
Critical-temperature, critical pressure, critical blank holder force, dissymmetry factor and critical size.
8. the method according to claim 5 or 6, it is characterised in that calculated by mole method of average
The critical parameters of the pseudocomponent.
9. the method according to claim 5 or 6, it is characterised in that the base oil or the condensation
The critical parameters and molar content of the corresponding pseudocomponent of gas carry out pressure-volume-temperature PVT phase state matchings.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108959767A (en) * | 2018-07-02 | 2018-12-07 | 中国地质大学（北京） | A kind of narrow river channel type gas reservoir difference well type condensate injury method for numerical simulation |
| CN110879196A (en) * | 2019-12-13 | 2020-03-13 | 西南石油大学 | Oil-water phase permeability testing method for oil-rich condensate gas reservoir |
| CN112819035A (en) * | 2021-01-12 | 2021-05-18 | 北京科技大学 | Method and device for judging gas channeling by utilizing PVT (physical vapor transport) experiment and machine learning |
| CN113223635A (en) * | 2021-04-09 | 2021-08-06 | 中国石油大学(北京) | Fluid shear viscosity determining method and device and electronic equipment |
| CN113673142A (en) * | 2020-05-13 | 2021-11-19 | 中国石油化工股份有限公司 | Condensate gas reservoir fluid composition inversion calculation method |
| CN115508903A (en) * | 2021-06-22 | 2022-12-23 | 中国石油化工股份有限公司 | High gas head content of CO 2 Oil and gas reservoir phase state fitting method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2255217C2 (en) * | 2003-09-03 | 2005-06-27 | Общество с ограниченной ответственностью "Научно-исследовательский институт природных газов и газовых технологий - ВНИИГАЗ" | Method for predicting change of fraction composition of bed gas condensate in process of gas-condensate deposit extraction |
| CN102953717A (en) * | 2011-08-26 | 2013-03-06 | 中国石油天然气股份有限公司 | Waste condensate gas reservoir water injection development method |
| CN104234677A (en) * | 2013-06-18 | 2014-12-24 | 中国石油天然气股份有限公司 | Method for improving condensate recovery ratio of condensate gas reservoir through gas injection vertical displacement |
-
2015
- 2015-12-30 CN CN201511021318.9A patent/CN106934084B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2255217C2 (en) * | 2003-09-03 | 2005-06-27 | Общество с ограниченной ответственностью "Научно-исследовательский институт природных газов и газовых технологий - ВНИИГАЗ" | Method for predicting change of fraction composition of bed gas condensate in process of gas-condensate deposit extraction |
| CN102953717A (en) * | 2011-08-26 | 2013-03-06 | 中国石油天然气股份有限公司 | Waste condensate gas reservoir water injection development method |
| CN104234677A (en) * | 2013-06-18 | 2014-12-24 | 中国石油天然气股份有限公司 | Method for improving condensate recovery ratio of condensate gas reservoir through gas injection vertical displacement |
Non-Patent Citations (3)
| Title |
|---|
| HOSSEIN MOHAMMADI，MOHAMMAD HOSSEIN SEDAGHAT, ABBAS KHAKSA: "Parametric investigation of well testing analysis in low permeability", 《JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING》 * |
| 刘长林，张茂林，梅海燕，刘颖: "凝析气藏油气体系相态测试与拟合", 《石油地质与工程》 * |
| 常志强，朱忠谦，陈文龙，阳建平，廖发明，康征，刘加元: "迪那2异常高压凝析气田井筒动态分析方法及软件研制", 《油气田开发技术大会》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108959767A (en) * | 2018-07-02 | 2018-12-07 | 中国地质大学（北京） | A kind of narrow river channel type gas reservoir difference well type condensate injury method for numerical simulation |
| CN108959767B (en) * | 2018-07-02 | 2020-05-22 | 中国地质大学（北京） | Method for simulating damage numerical values of condensate oil in different well types of narrow-river-channel gas reservoir |
| CN110879196A (en) * | 2019-12-13 | 2020-03-13 | 西南石油大学 | Oil-water phase permeability testing method for oil-rich condensate gas reservoir |
| CN110879196B (en) * | 2019-12-13 | 2022-02-11 | 西南石油大学 | Oil-water phase permeability testing method for oil-rich condensate gas reservoir |
| CN113673142A (en) * | 2020-05-13 | 2021-11-19 | 中国石油化工股份有限公司 | Condensate gas reservoir fluid composition inversion calculation method |
| CN112819035A (en) * | 2021-01-12 | 2021-05-18 | 北京科技大学 | Method and device for judging gas channeling by utilizing PVT (physical vapor transport) experiment and machine learning |
| CN112819035B (en) * | 2021-01-12 | 2021-11-09 | 北京科技大学 | Method and device for judging gas channeling by utilizing PVT (physical vapor transport) experiment and machine learning |
| CN113223635A (en) * | 2021-04-09 | 2021-08-06 | 中国石油大学(北京) | Fluid shear viscosity determining method and device and electronic equipment |
| CN115508903A (en) * | 2021-06-22 | 2022-12-23 | 中国石油化工股份有限公司 | High gas head content of CO 2 Oil and gas reservoir phase state fitting method and application thereof |
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