CN113294133B - Method and system for determining fire flooding front edge in fire flooding well pattern - Google Patents
Method and system for determining fire flooding front edge in fire flooding well pattern Download PDFInfo
- Publication number
- CN113294133B CN113294133B CN202010835341.6A CN202010835341A CN113294133B CN 113294133 B CN113294133 B CN 113294133B CN 202010835341 A CN202010835341 A CN 202010835341A CN 113294133 B CN113294133 B CN 113294133B
- Authority
- CN
- China
- Prior art keywords
- production well
- control unit
- fire
- well
- crude oil
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 65
- 238000004519 manufacturing process Methods 0.000 claims abstract description 360
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 109
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 109
- 238000002347 injection Methods 0.000 claims abstract description 102
- 239000007924 injection Substances 0.000 claims abstract description 102
- 239000010779 crude oil Substances 0.000 claims description 209
- 229930195733 hydrocarbon Natural products 0.000 claims description 85
- 150000002430 hydrocarbons Chemical class 0.000 claims description 85
- 239000003921 oil Substances 0.000 claims description 83
- 239000004215 Carbon black (E152) Substances 0.000 claims description 71
- 238000002485 combustion reaction Methods 0.000 claims description 65
- 238000006243 chemical reaction Methods 0.000 claims description 15
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 14
- 238000004590 computer program Methods 0.000 claims description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 7
- 238000003860 storage Methods 0.000 claims description 7
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 6
- 239000001569 carbon dioxide Substances 0.000 claims description 6
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 6
- 229910002090 carbon oxide Inorganic materials 0.000 claims description 3
- 230000001788 irregular Effects 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 141
- 238000010586 diagram Methods 0.000 description 14
- 230000035699 permeability Effects 0.000 description 14
- 230000015572 biosynthetic process Effects 0.000 description 12
- 230000006870 function Effects 0.000 description 6
- 238000009826 distribution Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000010304 firing Methods 0.000 description 4
- 238000011065 in-situ storage Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 150000001720 carbohydrates Chemical class 0.000 description 3
- 235000014633 carbohydrates Nutrition 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Images
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
- 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
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
- E21B43/243—Combustion in situ
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/30—Specific pattern of wells, e.g. optimising the spacing of wells
-
- 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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/40—Controlling or monitoring, e.g. of flood or hurricane; Forecasting, e.g. risk assessment or mapping
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- Geometry (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention provides a method and a system for determining a fire flooding front in a fire flooding well pattern. The method comprises the following steps: dividing a fire drive control unit of each production well in the target well group by taking the gas injection well as a reference; wherein the target well group comprises a gas injection well and at least one production well; acquiring the quantity of carbon elements in the produced gas of each production well in the target well group and the oil reservoir parameters of a fireflood control unit of each production well in the target well group; and determining the position of a fire flooding front in the fire flooding control unit of each production well based on the amount of carbon elements in the produced gas of each production well and the oil reservoir parameters of the fire flooding control unit of each production well. The method can be used for determining the irregular fireflood front edge in different fireflood well patterns of the heterogeneous oil reservoir.
Description
Technical Field
The invention belongs to the technical field of petroleum well logging, and particularly relates to a method, a system, a device and a storage medium for determining irregular fireflood front edges in a heterogeneous oil reservoir different types of fireflood well patterns by utilizing the carbon element quantity in the produced gas of a fireflood production well.
Background
The fireflood technique requires the simultaneous presence of gas injection wells and production wells, and the combination of the wells in a certain proportion and arrangement. The process is that firstly, combustion-supporting gas such as air or oxygen is injected into the gas injection well, and meanwhile, the oil layer is ensured to have enough relative permeability, so that oxygen required by combustion can be provided for the oil layer, waste gas generated in the combustion process can be discharged, and then the oil layer is ignited in the pit, and gas injection is continued to maintain the combustion of the oil layer, so that a narrow high-temperature combustion zone is formed in the oil layer, and the combustion zone is continuously combusted along with the replenishment of the injected oxygen and is propelled to the production well by the gas injection well.
Accurate definition of in-situ combustion front position is important to determine and select reasonable development parameters and to adjust operating parameters in real time during in-situ combustion. In the process of developing thick oil and extra thick oil by adopting an in-situ combustion method, the propelling speed of the fire wire, the position of the fire wire, the physical and chemical reaction in the stratum caused by combustion, the development dynamics of a well and the like are all main controlled parameters in the in-situ combustion process, and the gas injection intensity of different stages can be timely and reasonably regulated and corresponding control measures can be adopted only according to the mastered radial distance of the forward edge of the fire wire, so that the fire wire is uniformly and stably propelled forward, and the optimal fire flooding effect is achieved.
Disclosure of Invention
The invention aims to provide a method for determining a fireflood front in fireflood well patterns; the method can be used for determining the irregular fireflood front edge in different fireflood well patterns of the heterogeneous oil reservoir.
In order to achieve the above purpose, the invention provides a method for determining a fireflood front in a fireflood well pattern, wherein the method comprises the following steps:
dividing a fire drive control unit of each production well in the target well group by taking the gas injection well as a reference; wherein the target well group comprises a gas injection well and at least one production well;
acquiring the quantity of carbon elements in the produced gas of each production well in the target well group and the oil reservoir parameters of a fireflood control unit of each production well in the target well group;
and determining the position of a fire flooding front in the fire flooding control unit of each production well based on the amount of carbon elements in the produced gas of each production well and the oil reservoir parameters of the fire flooding control unit of each production well.
In the method for determining a fireflood front in a fireflood well pattern, preferably, the oil reservoir parameters include crude oil parameters and stratum parameters; more preferably, the crude oil parameters include the content of heavy hydrocarbon components in crude oil in the target well group and the content of carbon elements in the heavy hydrocarbon components in crude oil in the target well group, and the stratum parameters include the thickness of a gas injection layer in a fire flooding control unit of each production well, the porosity, the saturation of oil content and the included angle corresponding to the position of the fire flooding control unit of each production well at the gas injection well (namely, the distribution angle of the gas injection well in the target well group along the direction of each production well).
In the method for determining a fireflood front in a fireflood well pattern, preferably, the determining the position of the fireflood front in the fireflood control unit of each production well based on the amount of carbon element in the produced gas of each production well and the oil reservoir parameter of the fireflood control unit of each production well includes:
determining the internal reference of the fireflood control unit of each production well and the volume of the burnt crude oil based on the quantity of carbon element in the produced gas of each production well and the crude oil parameters of the fireflood control unit of each production well;
and determining the radius of the crude oil which is involved in combustion in the fire-flooding control unit of each production well based on the volume of the crude oil which is involved in combustion and the stratum parameters of the fire-flooding control unit of each production well, thereby determining the position of the fire-flooding front in the fire-flooding control unit of each production well.
In a specific embodiment, the determining the location of the fire front in the fire control unit of each production well based on the amount of carbon element in the produced gas of each production well and the oil reservoir parameter of the fire control unit of each production well includes:
determining the volumes of the internal reference and the combusted crude oil of the fireflood control units of the production wells based on the amounts of carbon elements in the produced gas of the production wells and the contents of heavy hydrocarbon components in the crude oil in the target well group;
And determining the radius of the internal parameter of the fire flooding control unit of each production well and the burnt crude oil based on the volume of the crude oil involved in combustion, the thickness, the porosity and the oil saturation of the gas injection layer in the fire flooding control unit of each production well and the included angle corresponding to the position of the fire flooding control unit of each production well in the gas injection well.
In the method for determining the fire flooding front in the fire flooding well pattern, preferably, in the process of determining the content of the crude oil which is considered to be combusted by the fire flooding control unit of each production well based on the amount of carbon element in the produced gas of each production well and the crude oil parameters of the fire flooding control unit of each production well, it is assumed that the components of the formation crude oil in the target well group are consistent. More preferably, the volume of crude oil that is involved in combustion in the fireflood control unit for each production well is calculated by the following equation:
wherein V is i For i the internal reference of the fireflood control unit of the production well to the volume of the burnt crude oil, m 3 ；V C reaction i For i producing wellsThe amount of carbon element in the produced gas is kg; v (V) Heavy hydrocarbon C The content of carbon element in the heavy hydrocarbon component of the crude oil in the target well group is calculated by taking the total mass of the heavy hydrocarbon component of the crude oil in the target well group as 100 percent; v (V) Heavy hydrocarbons The content of heavy hydrocarbon components in crude oil in a target well group is calculated by taking the total mass of the crude oil as 100 percent; ρ Crude oil Kg/m for the density of crude oil in the target well group 3 。
In a specific embodiment, the amount of elemental carbon in the i production well effluent is determined by the amount of carbohydrates; preferably, the amount of elemental carbon in the i production well gas comprises the amount of elemental carbon in carbon monoxide and the amount of elemental carbon in carbon dioxide in the i production well gas.
In the above method for determining a fireflood front in a fireflood pattern, it is preferable that, in determining the radius of the fireflood control unit of each production well and the parameter of the combustion crude oil based on the volume of the crude oil involved in combustion and the formation parameters of the fireflood control unit of each production well, it is assumed that the thickness of the gas injection layer in the fireflood control unit of each production well is consistent, the porosity is consistent, the permeability is consistent, and the saturation of oil content is consistent (i.e., the thickness of the gas injection layer, the porosity, the permeability, and the saturation of oil content in the fireflood control unit of each production well are considered to be homogeneous). More preferably, the radius of the crude oil as the internal parameters of the fireflood control unit for each production well and as the combustion is calculated by the following formula:
wherein V is i For i the internal reference of the fireflood control unit of the production well to the volume of the burnt crude oil, m 3 ；R i The radius m of the crude oil which is internally related to combustion is i the fire drive control unit of the production well; alpha i I, the included angle, degree, corresponding to the position of the gas injection well of the fire driving control unit of the production well is defined as the included angle, degree; h i The thickness of the gas injection layer in the fireflood control unit of the production well is i, m;
fireflood for i production wellsControlling the porosity in the unit,%; s is S Oi Oil saturation,%, is included in the fireflood control unit of the production well. />
In the method for determining a fireflood front in a fireflood well pattern, preferably, the determining the position of the fireflood front in the fireflood control unit of each production well based on the amount of carbon element in the produced gas of each production well and the oil reservoir parameters of the fireflood control unit of each production well is performed by: and obtaining the radius of the crude oil which is internally referred to and burnt by the fire flooding control unit of each production well according to a preset fire flooding front model based on the quantity of carbon elements in the produced gas of each production well and the oil reservoir parameters of the fire flooding control unit of each production well, so as to determine the position of the fire flooding front in the fire flooding control unit of each production well. More preferably, the preset fire front model is the corresponding relation between the radius of the crude oil involved in combustion and the content of carbon elements and the oil reservoir parameters of the fire control unit of each production well. Further preferably, the preset fireflood front model is:
Wherein R is i The radius m of the crude oil which is internally related to combustion is i the fire drive control unit of the production well; alpha i I, the included angle, degree, corresponding to the position of the gas injection well of the fire driving control unit of the production well is defined as the included angle, degree; h i The thickness of the gas injection layer in the fireflood control unit of the production well is i, m;
porosity in the fireflood control unit of the production well,%; s is S Oi Oil saturation is included in a fireflood control unit of the production well,%; v (V) C reaction i The amount of carbon element in the produced gas of the production well is i; v (V) Heavy hydrocarbon C Carbon element content in the heavy hydrocarbon component of crude oil in the target well group,%; v (V) Heavy hydrocarbons The content of heavy hydrocarbon components in crude oil in a target well group is percent; ρ Crude oil Kg/m for the density of crude oil in the target well group 3 。
The invention also provides a system for determining the fire flooding front edge in the fire flooding well pattern, wherein the system comprises:
a first dividing unit: a fire drive control unit for dividing each production well in the target well group by taking the gas injection well as a reference; wherein the target well group comprises a gas injection well and at least one production well;
a first acquisition unit: the method comprises the steps of obtaining the quantity of carbon elements in the produced gas of each production well in a target well group and the oil reservoir parameters of a fireflood control unit of each production well in the target well group;
A first processing unit: and the fire driving front edge in the fire driving control unit of each production well is respectively determined based on the amount of carbon element in the produced gas of each production well and the oil reservoir parameters of the fire driving control unit of each production well.
In the system for determining a fireflood front in a fireflood well network, preferably, the oil reservoir parameters comprise crude oil parameters and stratum parameters; more preferably, the crude oil parameters include the content of heavy hydrocarbon components in crude oil in the target well group and the content of carbon elements in the heavy hydrocarbon components in crude oil in the target well group, and the stratum parameters include the thickness of a gas injection layer in a fire flooding control unit of each production well, the porosity, the saturation of oil content and the included angle corresponding to the position of the fire flooding control unit of each production well at the gas injection well (namely, the distribution angle of the gas injection well in the target well group along the direction of each production well).
In the system for determining a fireflood front in a fireflood well network, preferably, the first processing unit includes:
a first processing module: the method comprises the steps of determining the internal reference of a fire control unit of each production well and the volume of combusted crude oil based on the quantity of carbon elements in the produced gas of each production well and the crude oil parameters of the fire control unit of each production well;
And a second processing module: the method is used for determining the radius of the crude oil which is internally involved in combustion of the fire control unit of each production well based on the volume of the crude oil which is involved in combustion and the stratum parameters of the fire control unit of each production well, so as to determine the position of the fire front in the fire control unit of each production well.
In a specific embodiment, the first processing unit includes:
a first processing module: the method comprises the steps of determining the volumes of the internal reference and the combusted crude oil of a fire flooding control unit of each production well based on the amounts of carbon elements in the produced gas of each production well, the content of heavy hydrocarbon components in the crude oil in the target well group and the content of carbon elements in the heavy hydrocarbon components in the crude oil in the target well group;
and a second processing module: the method is used for determining the radius of the crude oil which is internally involved in combustion of the fire flooding control units of the production wells based on the volume of the crude oil which participates in combustion, the thickness, the porosity and the oil saturation of the gas injection layer in the fire flooding control units of the production wells and the included angle corresponding to the position of the gas injection well in the fire flooding control units of the production wells.
In the system for determining a fireflood front in a fireflood well pattern, preferably, the first processing module assumes that the components of the formation crude oil in the target well group are consistent in determining the content of the combustion crude oil in the fireflood control unit of each production well. More preferably, the first processing module determines the volume of crude oil that is referenced to combustion in the fireflood control unit for each production well by the following equation:
Wherein V is i For i the internal reference of the fireflood control unit of the production well to the volume of the burnt crude oil, m 3 ；V C reaction i Kg of carbon element in the produced gas of the production well; v (V) Heavy hydrocarbon C The content of carbon element in the heavy hydrocarbon component of the crude oil in the target well group is calculated by taking the total mass of the heavy hydrocarbon component of the crude oil in the target well group as 100 percent; v (V) Heavy hydrocarbons The content of heavy hydrocarbon components in crude oil in a target well group is calculated by taking the total mass of the crude oil as 100 percent; ρ Crude oil Kg/m for the density of crude oil in the target well group 3 。
In the system for determining a fireflood front in a fireflood well pattern, preferably, the amount of carbon elements in the produced gas of the production well is determined by the content of carbon oxides; more preferably, the amount of elemental carbon in the i production well gas comprises the amount of elemental carbon in carbon monoxide in the i production well gas and the amount of elemental carbon in carbon dioxide.
In the foregoing system for determining a fireflood front in a fireflood pattern, preferably, the second processing module assumes that the thickness of the gas injection layer in the fireflood control unit of each production well is consistent, the porosity is consistent, the permeability is consistent, and the oil saturation is consistent (i.e., the thickness of the gas injection layer in the fireflood control unit of each production well, the porosity, the permeability, and the oil saturation are considered to be homogeneous) in determining the radius of the crude oil to be burned in the fireflood control unit of each production well. More preferably, the second processing module determines the radius of the crude oil that is being burned by the fireflood control unit for each production well by the following formula:
Wherein V is i For i the internal reference of the fireflood control unit of the production well to the volume of the burnt crude oil, m 3 ；R i The radius m of the crude oil which is internally related to combustion is i the fire drive control unit of the production well; alpha i I, the included angle, degree, corresponding to the position of the gas injection well of the fire driving control unit of the production well is defined as the included angle, degree; h i The thickness of the gas injection layer in the fireflood control unit of the production well is i, m;
porosity in the fireflood control unit of the production well,%; s is S Oi Oil saturation,%, is included in the fireflood control unit of the production well.
In the system for determining a fireflood front in a fireflood well pattern, preferably, the first processing unit determines the position of the fireflood front in the fireflood control unit of each production well by: and obtaining the radius of the crude oil which is internally referred to and burnt by the fire flooding control unit of each production well according to a preset fire flooding front model based on the quantity of carbon elements in the produced gas of each production well and the oil reservoir parameters of the fire flooding control unit of each production well, so as to determine the position of the fire flooding front in the fire flooding control unit of each production well. More preferably, the preset fire front model is the corresponding relation between the radius of the crude oil involved in combustion and the content of carbon elements and the oil reservoir parameters of the fire control unit of each production well. Further preferably, the preset fireflood front model is:
Wherein R is i The radius m of the crude oil which is internally related to combustion is i the fire drive control unit of the production well; alpha i I, the included angle, degree, corresponding to the position of the gas injection well of the fire driving control unit of the production well is defined as the included angle, degree; h i The thickness of the gas injection layer in the fireflood control unit of the production well is i, m;
porosity in the fireflood control unit of the production well,%; s is S Oi Oil saturation is included in a fireflood control unit of the production well,%; v (V) C reaction i The amount of carbon element in the produced gas of the production well is i; v (V) Heavy hydrocarbon C Carbon element content in the heavy hydrocarbon component of crude oil in the target well group,%; v (V) Heavy hydrocarbons The content of heavy hydrocarbon components in crude oil in a target well group is percent; ρ Crude oil Kg/m for the density of crude oil in the target well group 3 。
The invention also provides a device for determining the fire flooding front edge in the fire flooding well pattern, which comprises a processor and a memory; wherein,,
a memory for storing a computer program;
and the processor is used for realizing the steps of the method for determining the fire flooding front in the fire flooding well pattern when executing the program stored in the memory.
The invention also provides a computer readable storage medium storing one or more programs executable by one or more processors to implement the steps of the method for determining a fireflood front in a fireflood well pattern.
According to the technical scheme provided by the invention, the fireflood front leading edge of each production well is determined according to the content of carbon elements in the produced gas of each production well of the fireflood well pattern in the heterogeneous oil reservoir and the oil reservoir parameters, so that the determination of the irregular fireflood front in different types of fireflood well patterns in the heterogeneous oil reservoir is effectively realized.
Drawings
Fig. 1 is a flowchart illustrating a method for determining a fireflood front in a fireflood well network according to an embodiment of the present invention.
Fig. 2 is an optimized schematic diagram of step S13 in a method for determining a fireflood front in a fireflood well network according to an embodiment of the present invention.
Fig. 3A is a schematic cross-sectional view of a principle of fire flooding.
Fig. 3B is a schematic plan view of a principle of fireflood.
FIG. 4 is a schematic diagram of the locations of a gas injection well and a production well in accordance with one embodiment of the present invention.
FIG. 5 is a diagram of the location of a fire front within a fire control unit for each production well, as determined in accordance with one embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a system for determining a fireflood front in a fireflood well network according to an embodiment of the present invention.
FIG. 7 is an optimized schematic diagram of a first processing unit in a system for determining a fireflood front in a fireflood well pattern according to an embodiment of the present invention.
Fig. 8 is a schematic structural diagram of a determining device for a fireflood front in a fireflood well network according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
The principles and spirit of the present invention are described in detail below with reference to several representative embodiments thereof.
Referring to fig. 1, an embodiment of the present invention provides a method for determining a fire front in a fire flooding well pattern, where the method includes:
step S11: dividing a fire drive control unit of each production well in the target well group by taking the gas injection well as a reference; wherein the target well group comprises a gas injection well and at least one production well;
step S12: acquiring the quantity of carbon elements in the produced gas of each production well in the target well group and the oil reservoir parameters of a fireflood control unit of each production well in the target well group;
step S13: and respectively determining the position of the fire front in the fire control unit of each production well based on the amount of carbon element in the produced gas of each production well and the oil reservoir parameters of the fire control unit of each production well.
In the method, the fire driving front edge positions in the fire driving control units of the production wells are connected together, so that the complete fire driving front edge around the gas injection well can be formed.
In the target well group, a gas injection layer of the fireflood gas injection well is communicated with production layers of production wells in all directions; anisotropy may exist in the formation within the control reserves of each production well within the well group.
For a heterogeneous oil reservoir fireflood well group, due to the heterogeneity of the stratum, the injected air in the fireflood gas well can be unevenly diffused to the stratum around the well, so that the range of the fireflood gas well Zhou Huo is also irregularly shaped, namely, the irregular change of the position of the fireflood front, namely, the difference of stratum physical properties, can lead to the difference of the volume of the stratum occupied by the heavy hydrocarbon of crude oil involved in combustion in the stratum, the production conditions of all production wells in the fireflood well network taking the gas injection well as the center can be different, and the content of all components in the produced can be different. Due to the anisotropy of the oil layer, the propagation speed of the fire flooding front position in the radial direction is different, and the oil flooding speed is different.
The fireflood process is shown in fig. 3A-3B: the combustion starts from the gas injection well, the combustion front moves from the injection well to the production well, and the combustion front can be divided into a burnt zone, a combustion zone, a coking zone, an evaporation (cracking and distillation) zone, a light oil zone, an oil-rich zone, an unaffected zone and the like from the injection well to the production well. The distance of radial advance of the burned area can be considered as the fire front.
In preferred embodiments, the reservoir parameters include crude oil parameters and formation parameters; further, the crude oil parameters include the content of heavy hydrocarbon components in crude oil in the target well group and the content of carbon elements in the heavy hydrocarbon components in crude oil in the target well group, and the stratum parameters include the thickness of a gas injection layer in a fire flooding control unit of each production well, the porosity, the saturation of oil content and the corresponding included angle of the fire flooding control unit of each production well at the position of the gas injection well (namely the distribution angle of the gas injection well in the target well group along the direction of each production well).
In a preferred embodiment, referring to fig. 2, determining the location of the fire front within the fire control unit of each production well based on the amount of carbon element in the produced gas of each production well, the reservoir parameters of the fire control unit of each production well, respectively, comprises:
s131: determining the volumes of the internal reference and the burnt crude oil of the fire-flooding control units of the production wells based on the amounts of carbon elements in the produced gas of the production wells and the crude oil parameters of the fire-flooding control units of the production wells;
s132: and determining the radius of the crude oil which is involved in combustion in the fire-flooding control unit of each production well based on the volume of the crude oil which is involved in combustion and the stratum parameters of the fire-flooding control unit of each production well, thereby determining the position of the fire-flooding front in the fire-flooding control unit of each production well.
In a preferred embodiment, determining the location of the fire front within the fire control unit of each production well based on the amount of carbon element in the produced gas of each production well, the reservoir parameters of the fire control unit of each production well, respectively, comprises:
determining the volumes of the reference and combusted crude oil in the fireflood control units of the production wells based on the amounts of carbon elements in the produced gas of the production wells, the content of heavy hydrocarbon components in the crude oil in the target well group, and the content of carbon elements in the heavy hydrocarbon components in the crude oil in the target well group;
and determining the radius of the internal parameter of the fire flooding control unit of each production well and the burnt crude oil based on the volume of the crude oil involved in combustion, the thickness, the porosity and the oil saturation of the gas injection layer in the fire flooding control unit of each production well and the included angle corresponding to the position of the fire flooding control unit of each production well in the gas injection well.
In a preferred embodiment, the formation crude oil composition in the target well group is assumed to be consistent in determining the content of crude oil being combusted by the internal parameters of the fireflood control unit of each production well based on the amount of carbon element in the produced gas of each production well and the crude oil parameters of the fireflood control unit of each production well.
Further, the volume of crude oil that is internally referenced to combustion by the fireflood control unit for each production well is calculated by the following equation:
Wherein V is i For i the internal reference of the fireflood control unit of the production well to the volume of the burnt crude oil, m 3 ；V C reaction i Kg of carbon element in the produced gas of the production well; v (V) Heavy hydrocarbon C The content of carbon element in the heavy hydrocarbon component of the crude oil in the target well group is calculated by taking the total mass of the heavy hydrocarbon component of the crude oil in the target well group as 100 percent; v (V) Heavy hydrocarbons The content of heavy hydrocarbon components in crude oil in a target well group is calculated by taking the total mass of the crude oil as 100 percent; ρ Crude oil Kg/m for the density of crude oil in the target well group 3 。
In a preferred embodiment, the amount of elemental carbon in the i production well gas is determined by the amount of carbohydrates; preferably, the amount of elemental carbon in the i production well effluent gas comprises the amount of elemental carbon in carbon monoxide in the i production well effluent gas and the amount of elemental carbon in carbon dioxide.
In a preferred embodiment, in determining the radius of the fired crude oil as a function of the volume of crude oil involved in the firing and the formation parameters of the fireflood control unit for each production well, it is assumed that the gas injection layer thickness, porosity, permeability and oil saturation are consistent within the fireflood control unit for each production well (i.e., the gas injection layer thickness, porosity, permeability and oil saturation within the fireflood control unit for each production well are considered to be homogeneous).
Further, the radius of the crude oil which is internally related to combustion of the fireflood control unit of each production well is calculated by the following formula:
wherein V is i For i the internal reference of the fireflood control unit of the production well to the volume of the burnt crude oil, m 3 ；R i The radius m of the crude oil which is internally related to combustion is i the fire drive control unit of the production well; alpha i I, the included angle, degree, corresponding to the position of the gas injection well of the fire driving control unit of the production well is defined as the included angle, degree; h i The thickness of the gas injection layer in the fireflood control unit of the production well is i, m;
porosity in the fireflood control unit of the production well,%; s is S Oi Oil saturation,%, is included in the fireflood control unit of the production well.
In a preferred embodiment, determining the location of the fire front in the fire control unit of each production well based on the amount of carbon element in the produced gas of each production well, the reservoir parameters of the fire control unit of each production well, respectively, is performed by: and obtaining the radius of the crude oil which is internally related to the combustion of the fire flooding control unit of each production well according to a preset fire flooding front model based on the quantity of carbon elements in the produced gas of each production well and the oil reservoir parameters of the fire flooding control unit of each production well, so as to determine the position of the fire flooding front in the fire flooding control unit of each production well.
Further, the preset fireflood front model is the corresponding relation between the radius of the crude oil involved in combustion and the carbon element content, and the oil reservoir parameters of the fireflood control units of the production wells.
Still further, the pre-set fireflood front model is:
wherein R is i Fireflood control for i production wellsThe radius of crude oil participating in combustion in the unit, m; alpha i I, the included angle, degree, corresponding to the position of the gas injection well of the fire driving control unit of the production well is defined as the included angle, degree; h i The thickness of the gas injection layer in the fireflood control unit of the production well is i, m;
porosity in the fireflood control unit of the production well,%; s is S Oi Oil saturation is included in a fireflood control unit of the production well,%; v (V) C reaction i The amount of carbon element in the produced gas of the production well is i; v (V) Heavy hydrocarbon C Carbon element content in the heavy hydrocarbon component of crude oil in the target well group,%; v (V) Heavy hydrocarbons The content of heavy hydrocarbon components in crude oil in a target well group is percent; ρ Crude oil Kg/m for the density of crude oil in the target well group 3 。
The invention further provides a method for determining the fire flooding front edge in the fire flooding well pattern; the fireflood well pattern is a nine-point well pattern, as shown in fig. 4: the middle position is a fireflood gas injection well, 8 production wells (i=1, 2,3 … … 8) are arranged around, and the well distance between the production well i and the production well i+1 is 2Li; the method comprises the following steps:
1): dividing a fire drive control unit of each production well in the target well group by taking the gas injection well as a reference;
connecting the well distance midpoint position of each adjacent production well with the gas injection well, wherein the red line is the connecting line between the well distance midpoint and the gas injection well, and the included angle between the two red lines is alpha i The corresponding production well is a production well i, and the area between the two red lines and the black dotted line is the fireflood control unit corresponding to the production well i.
2): obtaining the quantity V of carbon element in the produced gas of each production well in the target well group C reaction i And reservoir parameters of a fireflood control unit of each production well in the target well group; the oil reservoir parameters comprise crude oil parameters and stratum parameters; the crude oil parameters include the content V of heavy hydrocarbon components in crude oil in the target well group Heavy hydrocarbons And the carbon element content V in the heavy hydrocarbon component of the crude oil in the target well group Heavy hydrocarbon C The stratum parameters comprise the thickness H of the gas injection layer in the fireflood control unit of each production well i Porosity of the porous body
Saturation of oil S Oi Included angle alpha corresponding to position of fire driving control unit of each production well in gas injection well i (i.e., the distribution angle of the gas injection wells in the target well group along each production well direction);
wherein the amount of carbon element in the produced gas of the i production well is determined by the amount of the carbon oxide, the amount of carbon element in the produced gas of the i production well comprises the amount of carbon element in carbon monoxide in the produced gas of the i production well and the amount of carbon element in carbon dioxide,
wherein the molar quantity of CO in the produced gas of the production well i is V coi 、CO 2 Molar mass of (2) is
As shown in FIG. 4, the fire control area of each production well i is S i The crude oil control volume reserves corresponding to production well i are due to the anisotropy of the stratum
3): determining the volumes of the reference and combusted crude oil in the fireflood control units of the production wells based on the amounts of carbon elements in the produced gas of the production wells, the content of heavy hydrocarbon components in the crude oil in the target well group, and the content of carbon elements in the heavy hydrocarbon components in the crude oil in the target well group; wherein, assume that the formation crude oil components in the target well group are consistent:
wherein V is i For i the internal reference of the fireflood control unit of the production well to the volume of the burnt crude oil, m 3 ；V C reaction i Kg of carbon element in the produced gas of the production well; v (V) Heavy hydrocarbon C The content of carbon element in the heavy hydrocarbon component of the crude oil in the target well group is calculated by taking the total mass of the heavy hydrocarbon component of the crude oil in the target well group as 100 percent; v (V) Heavy hydrocarbons The content of heavy hydrocarbon components in crude oil in a target well group is calculated by taking the total mass of the crude oil as 100 percent; ρ Crude oil Kg/m for the density of crude oil in the target well group 3 ；
4): determining the radius of the internal reference of the fire flooding control unit of each production well and the burnt crude oil based on the volume of the crude oil involved in combustion, the thickness, the porosity, the permeability of the gas injection layer in the fire flooding control unit of each production well, the saturation of oil content and the corresponding included angle of the fire flooding control unit of each production well at the position of the gas injection well; the method comprises the steps of assuming that a gas injection layer of a fireflood gas injection well is communicated with production layers of production wells in all directions, wherein anisotropy exists in stratum in a control reserve range of each production well in a well group, and the thickness of the gas injection layer in a fireflood control unit of each production well is kept consistent, the porosity is kept consistent, the permeability is kept consistent and the oil saturation is kept consistent (namely, the thickness, the porosity, the permeability and the oil saturation of the gas injection layer in the fireflood control unit of each production well are considered to be homogeneous):
R i The radius m of the crude oil which is internally related to combustion is i the fire drive control unit of the production well;
the fire driving front edge positions in the fire driving control units of all production wells are connected together, so that the complete fire driving front edge around the gas injection well can be formed;
as a result, as shown in fig. 5, during ignition of the gas injection well, the firing line is extended irregularly in all directions around the gas injection well due to the anisotropy of the formation. The arc line position in FIG. 5 is the fire line position in the fire drive control unit of each production well corresponding to the gas injection well, and the length R of the blue arrow line i The length of the firing line corresponding to the production well i is the gas injection well. Because of the anisotropy of the formation, there is a difference in the length of the firing line corresponding to each production well. Connecting the fire wire end points to obtain the fire around the gas injection wellThe driving effect area is the fire driving front edge position.
The embodiment of the invention also provides a system for determining the fire flooding front in the fire flooding well pattern, and the system is preferably used for realizing the method embodiment.
FIG. 6 is a block diagram of a system for determining a fireflood front in a fireflood well network according to an embodiment of the present invention, as shown in FIG. 6, the system comprising:
the first dividing unit 61: a fire drive control unit for dividing each production well in the target well group by taking the gas injection well as a reference; wherein the target well group comprises a gas injection well and at least one production well;
The first acquisition unit 62: the method comprises the steps of obtaining the quantity of carbon elements in the produced gas of each production well in a target well group and the oil reservoir parameters of a fireflood control unit of each production well in the target well group;
the first processing unit 63: and the device is used for respectively determining the fire front in the fire control unit of each production well based on the quantity of carbon elements in the produced gas of each production well and the oil reservoir parameters of the fire control unit of each production well.
In preferred embodiments, the reservoir parameters include crude oil parameters and formation parameters; further, the crude oil parameters include the content of heavy hydrocarbon components in crude oil in the target well group and the content of carbon elements in the heavy hydrocarbon components in crude oil in the target well group, and the stratum parameters include the thickness of gas injection layer, porosity, permeability and oil saturation in the fireflood control unit of each production well and the corresponding included angle of the fireflood control unit of each production well at the position of the gas injection well (namely the distribution angle of the gas injection well in the target well group along the direction of each production well).
In a preferred embodiment, referring to fig. 7, the first processing unit 63 includes:
the first processing module 631: the method comprises the steps of determining the volumes of the internal reference and the burnt crude oil of a fire drive control unit of each production well based on the amounts of carbon elements in the produced gas of each production well and the crude oil parameters of the fire drive control unit of each production well;
The second processing module 632: the method is used for determining the radius of the crude oil which is internally involved in combustion of the fire control unit of each production well based on the volume of the crude oil which is involved in combustion and the stratum parameters of the fire control unit of each production well, so as to determine the position of the fire front in the fire control unit of each production well.
In a preferred embodiment, the first processing unit 63 comprises:
the first processing module 631: the method comprises the steps of determining the volumes of the crude oil which are involved in and combusted in the fireflood control unit of each production well based on the amount of carbon elements in the produced gas of each production well, the content of heavy hydrocarbon components in the crude oil in the target well group and the content of carbon elements in the heavy hydrocarbon components in the crude oil in the target well group;
the second processing module 632: the method is used for determining the radius of the crude oil which is internally related to combustion of the fire flooding control units of the production wells based on the volume of the crude oil which participates in combustion, the thickness, the porosity, the permeability and the oil saturation of the gas injection layer in the fire flooding control units of the production wells and the included angle corresponding to the position of the gas injection well in the fire flooding control units of the production wells.
In a preferred embodiment, the first processing module 631 assumes that the formation crude oil composition within the target well group is consistent in determining the crude oil content of the combustion within the fireflood control unit of each production well.
Further, the first processing module 631 determines the volume of crude oil being burned as referenced by the fireflood control unit for each production well by the following equation:
wherein V is i For i the internal reference of the fireflood control unit of the production well to the volume of the burnt crude oil, m 3 ；V C reaction i Kg of carbon element in the produced gas of the production well; v (V) Heavy hydrocarbon C The content of carbon element in the heavy hydrocarbon component of the crude oil in the target well group is calculated by taking the total mass of the heavy hydrocarbon component of the crude oil in the target well group as 100 percent; v (V) Heavy hydrocarbons The content of heavy hydrocarbon components in crude oil in a target well group is calculated by taking the total mass of the crude oil as 100 percent; ρ Crude oil Kg/m for the density of crude oil in the target well group 3 。
In a preferred embodiment, the amount of elemental carbon in the i production well gas is determined by the amount of carbohydrates; further, the amount of elemental carbon in the i production well effluent gas includes the amount of elemental carbon in carbon monoxide in the i production well effluent gas and the amount of elemental carbon in carbon dioxide.
In a preferred embodiment, the second processing module 632, in determining the radius of the crude oil being burned within the fireflood control unit of each production well, assumes that the gas injection layer thickness is consistent, the porosity is consistent, the permeability is consistent, and the oil saturation is consistent within the fireflood control unit of each production well (i.e., the gas injection layer thickness, the porosity, the permeability, the oil saturation within the fireflood control unit of each production well are considered to be homogeneous).
Further, the second processing module 632 determines the radius of the crude oil being burned as a function of the internal fireflood control unit for each production well by the following equation:
wherein V is i For i the internal reference of the fireflood control unit of the production well to the volume of the burnt crude oil, m 3 ；R i The radius m of the crude oil which is internally related to combustion is i the fire drive control unit of the production well; alpha i I, the included angle, degree, corresponding to the position of the gas injection well of the fire driving control unit of the production well is defined as the included angle, degree; h i The thickness of the gas injection layer in the fireflood control unit of the production well is i, m;
porosity in the fireflood control unit of the production well,%; s is S Oi Oil saturation,%, is included in the fireflood control unit of the production well.
In a preferred embodiment, the first processing unit 63 determines the location of the fire front within the fire control unit of each production well by: and obtaining the radius of the crude oil which is internally related to the combustion of the fire flooding control unit of each production well according to a preset fire flooding front model based on the quantity of carbon elements in the produced gas of each production well and the oil reservoir parameters of the fire flooding control unit of each production well, so as to determine the position of the fire flooding front in the fire flooding control unit of each production well.
Further, the preset fireflood front model is the corresponding relation between the radius of the crude oil involved in combustion and the carbon element content, and the oil reservoir parameters of the fireflood control units of the production wells.
Still further, the pre-set fireflood front model is:
wherein R is i The radius m of the crude oil which is internally related to combustion is i the fire drive control unit of the production well; alpha i I, the included angle, degree, corresponding to the position of the gas injection well of the fire driving control unit of the production well is defined as the included angle, degree; h i The thickness of the gas injection layer in the fireflood control unit of the production well is i, m;
porosity in the fireflood control unit of the production well,%; s is S Oi Oil saturation is included in a fireflood control unit of the production well,%; v (V) C reaction i The amount of carbon element in the produced gas of the production well is i; v (V) Heavy hydrocarbon C Carbon element content in the heavy hydrocarbon component of crude oil in the target well group,%; v (V) Heavy hydrocarbons The content of heavy hydrocarbon components in crude oil in a target well group is percent; ρ Crude oil Kg/m for the density of crude oil in the target well group 3 。
FIG. 8 is a schematic diagram of a device for determining a fireflood front in a fireflood well network according to an embodiment of the present invention. The determining device of the fireflood front in the fireflood well pattern shown in fig. 8 is a general data processing device, which comprises a general computer hardware structure, and at least comprises a processor 1000 and a memory 1111; the processor 1000 is configured to execute a determining procedure of the fire flooding front in the fire flooding well pattern stored in the memory, so as to implement the method for determining the fire flooding front in the fire flooding well pattern according to the method embodiments (the specific method is referred to the description of the method embodiments and is not repeated here).
The embodiment of the invention also provides a computer readable storage medium, which stores one or more programs, and the one or more programs can be executed by one or more processors to implement the method for determining a fire flooding front in a fire flooding well network according to each method embodiment (the specific method refers to the description of the method embodiment and is not repeated here).
Preferred embodiments of the present invention are described above with reference to the accompanying drawings. The many features and advantages of the embodiments are apparent from the detailed specification, and thus, it is intended by the appended claims to cover all such features and advantages of the embodiments which fall within the true spirit and scope thereof. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the embodiments of the invention to the exact construction and operation illustrated and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope thereof.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.
Claims (5)
1. A method of determining a fireflood front in a fireflood well pattern, wherein the method comprises:
dividing a fire drive control unit of each production well in the target well group by taking the gas injection well as a reference; wherein the target well group comprises a gas injection well and at least one production well;
acquiring the quantity of carbon elements in the produced gas of each production well in the target well group and the oil reservoir parameters of a fireflood control unit of each production well in the target well group; the oil reservoir parameters comprise crude oil parameters and stratum parameters, wherein the crude oil parameters comprise the content of heavy hydrocarbon components in crude oil in a target well group and the content of carbon elements in the heavy hydrocarbon components in the crude oil in the target well group, and the stratum parameters comprise the thickness of a gas injection layer in a fireflood control unit of each production well, the porosity, the oil saturation and the corresponding included angle of the fireflood control unit of each production well at the position of the gas injection well;
Determining the position of a fire flooding front in the fire flooding control unit of each production well based on the amount of carbon element in the produced gas of each production well and the oil reservoir parameters of the fire flooding control unit of each production well;
the method comprises the steps of determining the position of a fire flooding front edge in a fire flooding control unit of each production well according to the amount of carbon elements in the produced gas of each production well and the oil reservoir parameters of the fire flooding control unit of each production well, wherein the position of the fire flooding front edge in the fire flooding control unit of each production well is performed in a first mode or a second mode;
mode one: the determining the position of the fire front in the fire control unit of each production well based on the carbon element amount in the produced gas of each production well and the oil reservoir parameter of the fire control unit of each production well comprises the following steps:
determining the internal reference of the fireflood control unit of each production well and the volume of the burnt crude oil based on the quantity of carbon element in the produced gas of each production well and the crude oil parameters of the fireflood control unit of each production well;
determining the radius of the crude oil which is involved in combustion in the fire-flooding control unit of each production well based on the volume of the crude oil which is involved in combustion and the stratum parameters of the fire-flooding control unit of each production well, so as to determine the position of the fire-flooding front edge in the fire-flooding control unit of each production well;
wherein, the volume of the crude oil which is internally related to combustion of the fireflood control unit of each production well is determined by the following formula:
Wherein V is i For i the internal reference of the fireflood control unit of the production well to the volume of the burnt crude oil, m 3 ；V C reaction i Kg of carbon element in the produced gas of the production well; v (V) Heavy hydrocarbon C The content of carbon element in the heavy hydrocarbon component of the crude oil in the target well group is calculated by taking the total mass of the heavy hydrocarbon component of the crude oil in the target well group as 100 percent; v (V) Heavy hydrocarbons Based on the total mass of the crude oil of 100%The content of heavy hydrocarbon components in crude oil in a target well group,%; ρ Crude oil Kg/m for the density of crude oil in the target well group 3 ；
Wherein, the radius of the crude oil which is internally related to combustion of the fire control unit of each production well is determined by the following formula:
wherein V is i For i the internal reference of the fireflood control unit of the production well to the volume of the burnt crude oil, m 3 ；R i The radius m of the crude oil which is internally related to combustion is i the fire drive control unit of the production well; alpha i I, the included angle, degree, corresponding to the position of the gas injection well of the fire driving control unit of the production well is defined as the included angle, degree; h i The thickness of the gas injection layer in the fireflood control unit of the production well is i, m;
porosity in the fireflood control unit of the production well,%; s is S Oi Oil saturation is included in a fireflood control unit of the production well,%;
mode two: based on the amount of carbon elements in the produced gas of each production well and the oil reservoir parameters of the fire-flooding control unit of each production well, obtaining the radius of the crude oil which is internally referred to and burned by the fire-flooding control unit of each production well according to a preset fire-flooding front model, so as to determine the position of the fire-flooding front in the fire-flooding control unit of each production well; wherein, the pre-set fireflood front model is:
Wherein R is i The radius m of the crude oil which is internally related to combustion is i the fire drive control unit of the production well; alpha i I, the included angle, degree, corresponding to the position of the gas injection well of the fire driving control unit of the production well is defined as the included angle, degree; h i The thickness of the gas injection layer in the fireflood control unit of the production well is i, m;
porosity in the fireflood control unit of the production well,%; s is S Oi Oil saturation is included in a fireflood control unit of the production well,%; v (V) C reaction i The amount of carbon element in the produced gas of the production well is i; v (V) Heavy hydrocarbon C Carbon element content in the heavy hydrocarbon component of crude oil in the target well group,%; v (V) Heavy hydrocarbons The content of heavy hydrocarbon components in crude oil in a target well group is percent; ρ Crude oil Kg/m for the density of crude oil in the target well group 3 。
2. The determination method according to claim 1, wherein the amount of carbon element in the production well produced gas is determined by the amount of carbon oxide; the amount of elemental carbon in the production well produced gas includes the amount of elemental carbon in carbon monoxide and the amount of elemental carbon in carbon dioxide in the production well produced gas.
3. A system for determining a fireflood front in a fireflood well pattern, wherein the system comprises:
a first dividing unit: a fire drive control unit for dividing each production well in the target well group by taking the gas injection well as a reference; wherein the target well group comprises a gas injection well and at least one production well;
A first acquisition unit: the method comprises the steps of obtaining the quantity of carbon elements in the produced gas of each production well in a target well group and the oil reservoir parameters of a fireflood control unit of each production well in the target well group; the oil reservoir parameters comprise crude oil parameters and stratum parameters, wherein the crude oil parameters comprise the content of heavy hydrocarbon components in crude oil in a target well group and the content of carbon elements in the heavy hydrocarbon components in the crude oil in the target well group, and the stratum parameters comprise the thickness of a gas injection layer in a fireflood control unit of each production well, the porosity, the oil saturation and the corresponding included angle of the fireflood control unit of each production well at the position of the gas injection well;
a first processing unit: the method comprises the steps of determining a fire front in a fire control unit of each production well based on the amount of carbon element in produced gas of each production well and oil reservoir parameters of the fire control unit of each production well;
the first processing unit comprises a first processing module and a second processing module; or alternatively; the first processing unit determines the position of a fire front in a fire control unit of each production well by the following method: based on the amount of carbon elements in the produced gas of each production well and the oil reservoir parameters of the fire-flooding control unit of each production well, obtaining the radius of the crude oil which is internally referred to and burned by the fire-flooding control unit of each production well according to a preset fire-flooding front model, so as to determine the position of the fire-flooding front in the fire-flooding control unit of each production well;
Wherein, the first processing module: the method comprises the steps of determining the internal reference of a fire control unit of each production well and the volume of combusted crude oil based on the quantity of carbon elements in the produced gas of each production well and the crude oil parameters of the fire control unit of each production well; the first processing module determines the volume of the crude oil which is internally related to combustion of the fire control unit of each production well through the following formula:
wherein V is i For i the internal reference of the fireflood control unit of the production well to the volume of the burnt crude oil, m 3 ；V C reaction i Kg of carbon element in the produced gas of the production well; v (V) Heavy hydrocarbon C The content of carbon element in the heavy hydrocarbon component of the crude oil in the target well group is calculated by taking the total mass of the heavy hydrocarbon component of the crude oil in the target well group as 100 percent; v (V) Heavy hydrocarbons The content of heavy hydrocarbon components in crude oil in a target well group is calculated by taking the total mass of the crude oil as 100 percent; ρ Crude oil Kg/m for the density of crude oil in the target well group 3 ；
Wherein, the second processing module: the method comprises the steps of determining the radius of the crude oil which is internally involved in combustion of a fire control unit of each production well based on the volume of the crude oil which is involved in combustion and stratum parameters of the fire control unit of each production well, so as to determine the position of a fire front in the fire control unit of each production well; the second processing module determines the radius of the crude oil which is internally related to combustion of the fire control unit of each production well through the following formula:
Wherein V is i For i the internal reference of the fireflood control unit of the production well to the volume of the burnt crude oil, m 3 ；R i The radius m of the crude oil which is internally related to combustion is i the fire drive control unit of the production well; alpha i I, the included angle, degree, corresponding to the position of the gas injection well of the fire driving control unit of the production well is defined as the included angle, degree; h i The thickness of the gas injection layer in the fireflood control unit of the production well is i, m;
porosity in the fireflood control unit of the production well,%; s is S Oi Oil saturation is included in a fireflood control unit of the production well,%;
wherein, the pre-set fireflood front model is:
wherein R is i The radius m of the crude oil which is internally related to combustion is i the fire drive control unit of the production well; alpha i I, the included angle, degree, corresponding to the position of the gas injection well of the fire driving control unit of the production well is defined as the included angle, degree; h i The thickness of the gas injection layer in the fireflood control unit of the production well is i, m;
porosity in the fireflood control unit of the production well,%; s is S Oi Oil saturation is included in a fireflood control unit of the production well,%; v (V) C reaction i The amount of carbon element in the produced gas of the production well is i; v (V) Heavy hydrocarbon C Carbon element content in the heavy hydrocarbon component of crude oil in the target well group,%; v (V) Heavy hydrocarbons The content of heavy hydrocarbon components in crude oil in a target well group is percent; ρ Crude oil Kg/m for the density of crude oil in the target well group 3 。
4. A device for determining a fireflood front in fireflood well network comprises a processor and a memory; wherein,,
a memory for storing a computer program;
a processor for implementing the steps of the method for determining a fire front in a fire flooding pattern of claim 1 or 2 when executing a program stored on a memory.
5. A computer readable storage medium storing one or more programs executable by one or more processors to perform the steps of the method of determining a fire front in a fire flooding pattern of claim 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010835341.6A CN113294133B (en) | 2020-08-19 | 2020-08-19 | Method and system for determining fire flooding front edge in fire flooding well pattern |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010835341.6A CN113294133B (en) | 2020-08-19 | 2020-08-19 | Method and system for determining fire flooding front edge in fire flooding well pattern |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113294133A CN113294133A (en) | 2021-08-24 |
| CN113294133B true CN113294133B (en) | 2023-05-26 |
Family
ID=77318318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010835341.6A Active CN113294133B (en) | 2020-08-19 | 2020-08-19 | Method and system for determining fire flooding front edge in fire flooding well pattern |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113294133B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4552216A (en) * | 1984-06-21 | 1985-11-12 | Atlantic Richfield Company | Method of producing a stratified viscous oil reservoir |
| CN102877835A (en) * | 2012-10-10 | 2013-01-16 | 中国石油天然气股份有限公司 | Well temperature prediction method for horizontal production well in fireflooding process |
| CN106761638A (en) * | 2016-12-15 | 2017-05-31 | 中国石油天然气股份有限公司 | Fire flooding and flue gas reinjection gravity flooding collaborative mining method for high-dip-angle heavy oil reservoir |
| CN109162686A (en) * | 2018-07-23 | 2019-01-08 | 中国石油大学(北京) | For predicting the method and device of fireflood leading edge locus |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4418651A (en) * | 1982-07-02 | 1983-12-06 | Vapor Energy, Inc. | System for heating and utilizing fluids |
| CA2492306A1 (en) * | 2005-01-13 | 2006-07-13 | Encana | In situ combustion following primary recovery processes utilizing horizontal well pairs in oil sands and heavy oil reservoirs |
| CN100560935C (en) * | 2006-12-18 | 2009-11-18 | 辽河石油勘探局 | A kind of oil reservoir fire-flooding thermal-ignition method |
| BR112014027854A2 (en) * | 2012-05-07 | 2017-06-27 | Nexen Energy Ulc | satellite-assisted gravity drainage with oxygen (sagdox) system for remote hydrocarbon recovery |
| CN102758603B (en) * | 2012-07-10 | 2015-02-25 | 中国石油天然气股份有限公司 | Super heavy oil reservoir SAGD exploitation later-period air injection exploitation method |
| CN106894801A (en) * | 2017-04-10 | 2017-06-27 | 中国石油天然气股份有限公司 | Method and device for judging ignition of oil layer |
| CN108457632B (en) * | 2018-02-09 | 2021-03-30 | 中国石油天然气股份有限公司 | Fire flooding oil extraction regulation and control method and device |
| CN108894763B (en) * | 2018-06-22 | 2020-11-24 | 西安石油大学 | Method for burying and utilizing tail gas generated by linear fireflooding |
-
2020
- 2020-08-19 CN CN202010835341.6A patent/CN113294133B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4552216A (en) * | 1984-06-21 | 1985-11-12 | Atlantic Richfield Company | Method of producing a stratified viscous oil reservoir |
| CN102877835A (en) * | 2012-10-10 | 2013-01-16 | 中国石油天然气股份有限公司 | Well temperature prediction method for horizontal production well in fireflooding process |
| CN106761638A (en) * | 2016-12-15 | 2017-05-31 | 中国石油天然气股份有限公司 | Fire flooding and flue gas reinjection gravity flooding collaborative mining method for high-dip-angle heavy oil reservoir |
| CN109162686A (en) * | 2018-07-23 | 2019-01-08 | 中国石油大学(北京) | For predicting the method and device of fireflood leading edge locus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113294133A (en) | 2021-08-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101849088B (en) | Engine system and method for substantially NOx-free combustion of a fuel in a compression ignition engine | |
| CN1256577C (en) | Control apparatus for motor vehicle and storage medium | |
| CN102767356A (en) | Method for using combustion and vapor combination flooding to exploit thick oil | |
| CN101672214B (en) | Combustion system for vehicle | |
| CN113294133B (en) | Method and system for determining fire flooding front edge in fire flooding well pattern | |
| JP6477433B2 (en) | Combustion system estimation device | |
| Castanier et al. | In situ combustion with metallic additives | |
| Mamora | New findings in low-temperature oxidation of crude oil | |
| JP5753142B2 (en) | Combustion control device for internal combustion engine and method for burning homogeneous lean mixture | |
| CN111852423B (en) | Fireflood leading edge determination method and device | |
| CN105697164A (en) | Method and system for control of emissions in exhaust aftertreatment system | |
| KR101284281B1 (en) | Method for measuring contents of hydrogen in hydrogen-compressed natural gas fuel | |
| RU2109133C1 (en) | Method for development of deposit with hard-to-recover oil reserves | |
| CN114060021B (en) | Method and device for determining propelling distance of firing line of each oil layer of thin interbed heavy oil reservoir | |
| RU2756720C2 (en) | Improvement of an installation for cleaning an internal combustion engine | |
| JP2000052817A (en) | Controller for vehicle | |
| CN113137218B (en) | Method and device for determining position of fire flooding front edge of fire flooding gas injection well | |
| CN112443381A (en) | Method for detecting a failure of an exhaust gas catalytic converter | |
| US3048225A (en) | Catalytic in situ combustion | |
| CN107965304A (en) | A kind of method to exploiting multilayer heavy crude reservoir to fireflood | |
| RU2139421C1 (en) | Method for development of oil deposit | |
| Puškár et al. | Possibilities for reducing combustion engine fuel consumption and gas emissions | |
| EP3441595A1 (en) | Method to adjust a control parameter of a fuel combustion engine | |
| Feng et al. | Key technologies for fire flooding in thin interbeded heavy oil reservoirs | |
| CN114059979A (en) | Method and device for determining residual oil of fireflood |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |