CN111852423B - Fireflood leading edge determination method and device - Google Patents
Fireflood leading edge determination method and device Download PDFInfo
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- CN111852423B CN111852423B CN201910297775.2A CN201910297775A CN111852423B CN 111852423 B CN111852423 B CN 111852423B CN 201910297775 A CN201910297775 A CN 201910297775A CN 111852423 B CN111852423 B CN 111852423B
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 claims abstract description 212
- 238000002347 injection Methods 0.000 claims abstract description 133
- 239000007924 injection Substances 0.000 claims abstract description 133
- 238000002485 combustion reaction Methods 0.000 claims abstract description 126
- 239000010779 crude oil Substances 0.000 claims abstract description 93
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 89
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 89
- 239000003921 oil Substances 0.000 claims abstract description 57
- 239000007789 gas Substances 0.000 claims description 122
- 229930195733 hydrocarbon Natural products 0.000 claims description 60
- 150000002430 hydrocarbons Chemical class 0.000 claims description 60
- 239000004215 Carbon black (E152) Substances 0.000 claims description 47
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 38
- 229910052760 oxygen Inorganic materials 0.000 claims description 38
- 239000001301 oxygen Substances 0.000 claims description 38
- 238000006243 chemical reaction Methods 0.000 claims description 21
- 238000004590 computer program Methods 0.000 claims description 16
- 238000003860 storage Methods 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 abstract description 11
- 238000010276 construction Methods 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000006870 function Effects 0.000 description 4
- 238000011065 in-situ storage Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
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- 239000000243 solution Substances 0.000 description 3
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- 238000006073 displacement reaction Methods 0.000 description 2
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- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000012407 engineering method Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
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- 230000003287 optical effect Effects 0.000 description 1
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- 239000003208 petroleum Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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Abstract
The invention provides a method and a device for determining a fire flooding front edge, wherein the method comprises the following steps: obtaining the thickness of a gas injection layer, the porosity of the gas injection layer and the oil saturation of the fireflood gas injection well; obtaining the carbon content participating in the combustion reaction during the production of the fireflood production well; determining the amount of crude oil participating in the combustion reaction during the production of the fireflood production well according to the carbon content participating in the combustion reaction during the production of the fireflood production well; and determining the fire flooding front edge according to the thickness of the gas injection layer, the porosity of the gas injection layer and the oil saturation of the fire flooding gas injection well and the quantity of crude oil participating in combustion reaction during production of the fire flooding production well. According to the technical scheme, monitoring wells are not needed to be arranged, the method is easy to implement, simple, quick and economical, the construction cost and the construction time are saved, and the fire flooding front edge can be quickly and simply calculated.
Description
Technical Field
The invention relates to the technical field of petroleum logging, in particular to a fireflood front determination method and a fireflood front determination device.
Background
Fire flooding exploitation is used as a replacing technology for thick oil steam injection exploitation, has higher thermal efficiency, is suitable for wider oil reservoir conditions, and can play a role in modifying crude oil. The fire flooding oil production technology needs to have an injection well and a production well at the same time, and the injection well and the production well are combined according to a certain proportion and an arrangement mode. The process is that firstly, the injection well injects combustion-supporting gas such as air or oxygen, and simultaneously ensures that the oil layer has enough relative permeability to the injection well, so as to provide oxygen required by combustion for the oil layer and discharge waste gas generated in the combustion process, then the ignition is carried out underground, and the gas injection is continued to maintain the combustion of the oil layer, thus a narrow high-temperature combustion zone is formed in the oil layer, and the combustion zone is continuously combusted along with the supply of the injected oxygen and is propelled to the production well by the injection well.
Crude oil is distilled and cracked under the action of high temperature, wherein lighter oil flows along an oil layer to a production well under the action of steam, and is condensed due to heat exchange when encountering rocks and fluid of the oil layer with lower temperature relative to the crude oil, heavy hydrocarbon components remained due to distillation and cracking in the combustion process are used as fuel to provide energy for maintaining combustion, exhaust gas generated after combustion is pushed forward under the pressure of a gas injection well, the rocks and the fluid of the oil layer are heated in the pushing process, and the crude oil is well displaced. Meanwhile, the water in the combustion products and the water vapor in the oil layer evaporated due to high temperature can be condensed in the propelling process, so that a hot water belt capable of displacing crude oil is formed, and the effect of hot water displacement is achieved.
The fire wire can generate local miscible phases among other components such as gas-phase hydrocarbons, condensate oil, water vapor and the like generated in the combustion propulsion process, and the miscible-phase flooding effect is achieved for the displacement of crude oil. Therefore, in order to maintain the normal combustion of the combustion front, fuel, temperature and oxygen for maintaining combustion are required in the oil layer, and the position of a firing line is continuously pushed towards the direction of a production well under certain gas injection pressure, so that a larger swept range is realized.
Accurate definition of the in situ combustion front location is very 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 propulsion speed of a live wire, the position of the live wire, the physicochemical reaction in a stratum caused by combustion, the development dynamics of a well and the like are main controlled parameters in the in-situ combustion process, and the gas injection strength in different stages can be timely and reasonably adjusted and corresponding control measures can be taken only according to the grasped radial distance advanced by the front edge of the fireflood, so that the live wire is uniformly and stably advanced, and the optimal fireflood effect is achieved. The conventional method is obtained by reasonably arranging monitoring wells between a production well and a gas injection well and analyzing according to the thermodynamic rule of the monitoring wells.
However, the fire flooding front edge is determined by adopting a monitoring well arrangement mode, the investment is needed again, the monitoring well arrangement also needs construction time, and the existing calculation method is complex and has low efficiency, so that the time for determining the fire flooding front edge is long, and the position of the fire flooding front edge cannot be simply and quickly calculated.
Disclosure of Invention
The embodiment of the invention provides a fire flooding front edge determining method, which is used for simply, quickly and economically determining a fire flooding front edge and comprises the following steps:
obtaining the thickness of a gas injection layer, the porosity of the gas injection layer and the oil saturation of the fireflood gas injection well;
obtaining the carbon content participating in the combustion reaction during the production of the fireflood production well;
determining the amount of crude oil participating in the combustion reaction during the production of the fireflood production well according to the carbon content participating in the combustion reaction during the production of the fireflood production well;
determining a fireflood front edge according to the thickness of a gas injection layer, the porosity of the gas injection layer and the oil saturation of the fireflood gas injection well and the amount of crude oil participating in a combustion reaction during production of a fireflood production well;
wherein, obtaining the carbon content participating in the combustion reaction during the production of the fireflood production well comprises:
obtaining the oxygen amount injected by the fireflood gas injection well;
obtaining the oxygen amount output by the fireflood production well;
according to the amount of oxygen injected into the fireflood gas injection well and the amount of oxygen produced by the fireflood production well, the carbon content participating in the combustion reaction during the production of the fireflood production well is obtained;
wherein, according to the carbon content participating in the combustion reaction during the production of the fireflood production well, the crude oil amount participating in the combustion reaction during the production of the fireflood production well is determined, and the method comprises the following steps:
obtaining the heavy hydrocarbon content in the crude oil;
obtaining the carbon content in the heavy hydrocarbon;
determining the amount of crude oil participating in the combustion reaction during the production of the fireflood production well according to the content of heavy hydrocarbon in the crude oil, the content of carbon in the heavy hydrocarbon and the content of carbon participating in the combustion reaction during the production of the fireflood production well;
wherein, the crude oil amount participating in the combustion reaction during the production of the fireflood production well is determined according to the following formula:
wherein, VCrude oilRepresenting the amount of crude oil participating in a combustion reaction during production of the fireflood production well; sHCRepresents the percentage of carbon content in the heavy hydrocarbon; sHRepresents the percentage of heavy hydrocarbons in the crude oil; vC reactionRepresenting the carbon content participating in the combustion reaction when the fireflood production well is producing;
wherein the fireflood front is determined according to the following formula:
wherein L represents the fireflood front; vC reactionRepresenting the carbon content participating in the combustion reaction when the fireflood production well is producing; sHCRepresents the percentage of carbon content in the heavy hydrocarbon; sHRepresents the percentage of heavy hydrocarbons in the crude oil; h represents the thickness of a gas injection layer of the fireflood gas injection well; phi represents the porosity of a gas injection layer of the fireflooding gas injection well; sOIndicating the oil saturation of the fireflood gas injection well.
The embodiment of the invention also provides a fire flooding front edge determining device, which is used for simply, quickly and economically determining the fire flooding front edge and comprises the following components:
the gas injection well parameter obtaining module is used for obtaining the thickness of a gas injection layer, the porosity of the gas injection layer and the oil saturation of the fireflood gas injection well;
the production well reaction carbon content obtaining module is used for obtaining the carbon content participating in the combustion reaction during production of the fireflood production well;
the raw oil quantity determining module is used for determining the raw oil quantity participating in the combustion reaction during the production of the fireflood production well according to the carbon content participating in the combustion reaction during the production of the fireflood production well;
the fireflood front determining module is used for determining a fireflood front according to the thickness of a gas injection layer, the porosity of the gas injection layer and the oil saturation of the fireflood gas injection well and the quantity of crude oil participating in a combustion reaction during production of the fireflood production well;
wherein the production well reaction carbon content obtaining module is specifically configured to:
obtaining the oxygen amount injected by the fireflood gas injection well;
obtaining the oxygen amount output by the fireflood production well;
according to the amount of oxygen injected into the fireflood gas injection well and the amount of oxygen produced by the fireflood production well, the carbon content participating in the combustion reaction during the production of the fireflood production well is obtained;
wherein, the crude oil amount determining module is specifically used for:
obtaining the heavy hydrocarbon content in the crude oil;
obtaining the carbon content in the heavy hydrocarbon;
determining the amount of crude oil participating in the combustion reaction during the production of the fireflood production well according to the content of heavy hydrocarbon in the crude oil, the content of carbon in the heavy hydrocarbon and the content of carbon participating in the combustion reaction during the production of the fireflood production well;
wherein, the crude oil quantity determination module is specifically configured to:
determining the amount of crude oil participating in a combustion reaction during production of the fireflood production well according to the following formula:
wherein, VCrude oilRepresenting the amount of crude oil participating in a combustion reaction during production of the fireflood production well; sHCRepresents the percentage of carbon content in the heavy hydrocarbon; sHRepresents the percentage of heavy hydrocarbons in the crude oil; vC reactionRepresenting the carbon content participating in the combustion reaction when the fireflood production well is producing;
the fireflood leading edge determination module is specifically configured to:
the fireflood front is determined as follows:
wherein L represents the fireflood front; vC reactionRepresenting the carbon content participating in the combustion reaction when the fireflood production well is producing; sHCRepresents the percentage of carbon content in the heavy hydrocarbon; sHRepresents the percentage of heavy hydrocarbons in the crude oil; h represents the thickness of a gas injection layer of the fireflood gas injection well; phi represents the porosity of a gas injection layer of the fireflooding gas injection well; sOIndicating the oil saturation of the fireflood gas injection well.
Embodiments of the present invention further provide a computer device for simply, quickly and economically predicting a fire front, the computer device including a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the fire front determination method when executing the computer program.
Embodiments of the present invention also provide a computer-readable storage medium for simply, quickly and economically predicting a fire front, the computer-readable storage medium storing a computer program for executing the fire front determination method.
In the embodiment of the invention, the thickness of a gas injection layer, the porosity of the gas injection layer and the oil saturation of the fireflood gas injection well are obtained, the carbon content participating in the combustion reaction during the production of the fireflood production well is obtained, and the crude oil amount participating in the combustion reaction during the production of the fireflood production well is determined according to the carbon content participating in the combustion reaction during the production of the fireflood production well; and determining the fire flooding front edge according to the thickness of the gas injection layer, the porosity of the gas injection layer and the oil saturation of the fire flooding gas injection well and the quantity of crude oil participating in combustion reaction during production of the fire flooding production well. The method does not need to arrange a monitoring well, is easy to implement, simple, quick and economical, saves the construction cost and the construction time, and can quickly and simply calculate to obtain the fireflood front edge.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts. In the drawings:
FIG. 1 is a schematic diagram of the fire flooding principle in an embodiment of the present invention;
FIG. 2 is a schematic diagram of a fireflood front determination method in an embodiment of the present invention;
FIG. 3 is a schematic diagram of a fireflood front determination device in 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 apparent, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
Aiming at the problem that a monitoring well needs to be arranged to predict the fire flooding front edge in the prior art, the embodiment of the invention provides a fire flooding front edge determining method and device, aiming at saving construction cost and construction time and simply, quickly and economically calculating the fire flooding front edge by not arranging the monitoring well.
FIG. 1 is a schematic diagram of the principle of fireflooding in the embodiment of the invention, as shown in FIG. 1, combustion starts from a gas injection well, the combustion front moves from an injection well to a production well, and from the injection well to the production well, the combustion front can be divided into a burnt zone, a combustion zone, a coking zone, a steam (cracking, distillation) zone, a light oil zone, an oil-rich zone and several unaffected zones. The radial advance distance of the burnt zone can be regarded as the fire front.
Fig. 2 is a schematic diagram of a fire front determination method in an embodiment of the invention, and as shown in fig. 2, the method may include:
202, obtaining the carbon content participating in combustion reaction during production of the fireflood production well;
and 204, determining the fire flooding front edge according to the thickness of the gas injection layer, the porosity of the gas injection layer and the oil saturation of the fire flooding gas injection well and the quantity of crude oil participating in combustion reaction during production of the fire flooding production well.
As can be seen from the flow shown in fig. 2, in the embodiment of the present invention, the fireflood front is rapidly calculated by obtaining the gas injection layer thickness, the gas injection layer porosity, the oil saturation and the carbon content participating in the combustion reaction during production of the fireflood production well, so that a scheme for determining the fireflood front without arranging a monitoring well is provided, and a method for simply, rapidly and economically determining the fireflood front is realized.
When the method is specifically implemented, the thickness of a gas injection layer, the porosity of the gas injection layer and the oil saturation of the fireflooding gas injection well are obtained firstly. One skilled in the art will readily appreciate that there are many ways to achieve gas injection layer thickness, gas injection layer porosity, and oil saturation for fireflood gas injection wells. For example, when the porosity of a gas injection layer of the fireflood gas injection well is obtained, a conventional geometric measurement method, a wind pulling method, a saturated kerosene method, a mercury method and the like can be adopted; when the oil saturation of the fireflood gas injection well is obtained, methods such as a direct core measurement method, an experimental oil reservoir engineering method or a geophysical logging method can be adopted.
In specific implementation, the carbon content participating in the combustion reaction during the production of the fireflood production well is also required to be obtained. In one embodiment, obtaining the carbon content involved in the combustion reaction in producing the fireflood production well may include: obtaining the oxygen amount injected by the fireflood gas injection well; obtaining the oxygen output by the fireflood production well; and obtaining the carbon content participating in the combustion reaction during the production of the fireflood production well according to the oxygen amount injected into the fireflood gas injection well and the oxygen amount produced by the fireflood production well.
For example, the amount of oxygen injected by the fireflood gas injection well can be obtained by analyzing the composition of the gas injected by the fireflood gas injection well; the oxygen amount produced by the fireflood production well can be obtained by analyzing the components of the gas produced by the fireflood production well. According to the oxygen amount injected by the fireflood gas injection well and the oxygen amount output by the fireflood production well, the oxygen amount participating in the combustion reaction can be obtained. For example, the amount of oxygen injected into a fireflood gas injection well
Indicating the amount of oxygen produced by the fireflood production well
Indicating the amount of oxygen participating in the combustion reaction
Comprises the following steps:
in an embodiment, after obtaining the amount of oxygen participating in the combustion reaction, the amount of oxygen may be calculated according to the chemical reaction equation C + O2＝CO2The carbon content participating in the combustion reaction during the production of the fireflood production well is obtained, so that the carbon content participating in the combustion reaction during the production of the fireflood production wellQuantity VC reactionComprises the following steps:
in specific implementation, the crude oil amount participating in the combustion reaction during the production of the fireflood production well is determined according to the carbon content participating in the combustion reaction during the production of the fireflood production well. In one embodiment, determining the amount of crude oil that participates in the combustion reaction when producing the fireflood production well based on the carbon content that participates in the combustion reaction when producing the fireflood production well may include: obtaining the heavy hydrocarbon content in the crude oil; obtaining the carbon content in the heavy hydrocarbon; and determining the crude oil amount participating in the combustion reaction during the production of the fireflood production well according to the content of heavy hydrocarbon in the crude oil, the content of carbon in the heavy hydrocarbon and the content of carbon participating in the combustion reaction during the production of the fireflood production well.
For example, the percentage of heavy hydrocarbons in the crude oil can be obtained by analyzing the crude oil components, among others; the percentage of carbon in the heavy hydrocarbon can be obtained by analyzing the composition of the heavy hydrocarbon.
In one embodiment, assuming the composition of crude oil in the formation is balanced, the heavy hydrocarbon component in the crude oil is fully combusted, the carbon in the heavy hydrocarbon component is fully combusted, the carbon participating in the combustion reaction during the production of the fireflood production well is all derived from the carbon in the heavy hydrocarbon component, and the carbon participating in the combustion reaction during the production of the fireflood production well is expressed as VC reactionExpressed as the percentage of carbon content in the heavy hydrocarbon is expressed as SHCDenotes the heavy hydrocarbon content V in the crude oilHeavy hydrocarbonsComprises the following steps:
after the content of the heavy hydrocarbon in the crude oil is obtained, the amount of the crude oil participating in the combustion reaction during the production of the fireflood production well can be determined according to the content of the heavy hydrocarbon in the crude oil, the carbon content in the heavy hydrocarbon and the carbon content participating in the combustion reaction during the production of the fireflood production well. For example, the percentage of heavy hydrocarbons in the crude oil is expressed as SHExpressed as the percentage of carbon content in the heavy hydrocarbon is expressed as SHCExpressed as V represents the heavy hydrocarbon content of the crude oilHeavy hydrocarbonsIndicating that the fireflood production well is producingThe carbon content participating in the combustion reaction is represented by VC reactionIndicating the amount of crude oil V that participates in the combustion reaction when producing the fireflood production wellCrude oilComprises the following steps:
in specific implementation, the fireflood front edge is determined according to the thickness of a gas injection layer, the porosity of the gas injection layer and the oil saturation of the fireflood gas injection well and the amount of crude oil participating in a combustion reaction during production of a fireflood production well.
The amount of crude oil participating in combustion reaction during production of the fireflood production well can be obtained according to the radial distance of the crude oil participating in combustion, the thickness of a gas injection layer of the fireflood gas injection well, the porosity of the gas injection layer and the oil saturation. For example, the radial distance of crude oil participating in combustion is represented by L, the thickness of an air injection layer of a fireflood gas injection well is represented by H, the porosity of the air injection layer of the fireflood gas injection well is represented by phi, and the oil saturation of the fireflood gas injection well is represented by SOIndicating the amount of crude oil V that participates in the combustion reaction when producing the fireflood production wellCrude oilComprises the following steps: vCrude oil＝πL2HφSO。
In an embodiment, then
Then the radial distance L of the crude oil participating in combustion is:
the radial distance of the crude oil participating in combustion can be regarded as a fire flooding front edge, so that the fire flooding front edge is determined simply, quickly and economically.
Based on the same inventive concept, the embodiment of the present invention further provides a fire front determination device, as described in the following embodiments. Because the principle of solving the problems of the device is similar to that of the fireflood leading edge determination method, the implementation of the device can refer to the implementation of the fireflood leading edge determination method, and repeated details are not repeated.
Fig. 3 is a schematic diagram of a fireflood leading edge determination device in an embodiment of the present invention, as shown in fig. 3, the device may include:
the gas injection well parameter obtaining module 301 is used for obtaining the thickness of a gas injection layer, the porosity of the gas injection layer and the oil saturation of the fireflood gas injection well;
a production well reaction carbon content obtaining module 302 for obtaining the carbon content of the combustion reaction in the production of the fireflood production well;
the raw oil quantity determining module 303 is used for determining the raw oil quantity participating in the combustion reaction during the production of the fireflood production well according to the carbon content participating in the combustion reaction during the production of the fireflood production well;
and the fireflood front determining module 304 is used for determining the fireflood front according to the thickness of the gas injection layer, the porosity of the gas injection layer and the oil saturation of the fireflood gas injection well and the quantity of crude oil participating in combustion reaction during production of the fireflood production well.
In an embodiment, the production well reaction carbon content obtaining module 302 may be specifically configured to: obtaining the oxygen amount injected by the fireflood gas injection well; obtaining the oxygen amount output by the fireflood production well; and obtaining the carbon content participating in the combustion reaction during the production of the fireflood production well according to the oxygen amount injected into the fireflood gas injection well and the oxygen amount produced by the fireflood production well.
In one embodiment, the crude oil quantity determination module 303 may be specifically configured to: obtaining the heavy hydrocarbon content in the crude oil; obtaining the carbon content in the heavy hydrocarbon; and determining the crude oil amount participating in the combustion reaction during the production of the fireflood production well according to the content of heavy hydrocarbon in the crude oil, the content of carbon in the heavy hydrocarbon and the content of carbon participating in the combustion reaction during the production of the fireflood production well.
In one embodiment, the crude oil quantity determination module 303 may be specifically configured to:
determining the amount of crude oil participating in a combustion reaction during production of the fireflood production well according to the following formula:
wherein, VCrude oilRepresenting the amount of crude oil participating in a combustion reaction during production of the fireflood production well; sHCRepresents the percentage of carbon content in the heavy hydrocarbon; sHRepresents the percentage of heavy hydrocarbons in the crude oil; vC reactionRepresenting the carbon content participating in the combustion reaction when the fireflood production well is producing.
In an embodiment, the fireflood front determination module 304 may be specifically configured to:
the fireflood front is determined as follows:
wherein L represents the fireflood front; vC reactionRepresenting the carbon content participating in the combustion reaction when the fireflood production well is producing; sHCRepresents the percentage of carbon content in the heavy hydrocarbon; sHRepresents the percentage of heavy hydrocarbons in the crude oil; h represents the thickness of a gas injection layer of the fireflood gas injection well; phi represents the porosity of a gas injection layer of the fireflooding gas injection well; sOIndicating the oil saturation of the fireflood gas injection well.
An embodiment of the present invention further provides a computer device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor executes the computer program to implement the method for determining a fire front.
The embodiment of the invention also provides a computer readable storage medium, which stores a computer program for executing the fire front determination method.
In summary, in the embodiment of the present invention, the gas injection layer thickness, the gas injection layer porosity and the oil saturation of the fireflood gas injection well are obtained, the carbon content participating in the combustion reaction during the production of the fireflood production well is obtained, the raw oil amount participating in the combustion reaction during the production of the fireflood production well is determined according to the carbon content participating in the combustion reaction during the production of the fireflood production well, and the fireflood front is determined according to the gas injection layer thickness, the gas injection layer porosity and the oil saturation of the fireflood gas injection well and the raw oil amount participating in the combustion reaction during the production of the fireflood production well, so that the fireflood front is simply, quickly and economically predicted, and the problems that the fireflood front needs to be invested again and the arrangement of the monitoring wells needs to be constructed in the prior art by adopting the monitoring well arrangement manner are solved.
As will be appreciated by one skilled in the art, 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 has been 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 flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams 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 above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (4)
1. A method of fireflood lead determination, comprising:
obtaining the thickness of a gas injection layer, the porosity of the gas injection layer and the oil saturation of the fireflood gas injection well;
obtaining the carbon content participating in the combustion reaction during the production of the fireflood production well;
determining the amount of crude oil participating in the combustion reaction during the production of the fireflood production well according to the carbon content participating in the combustion reaction during the production of the fireflood production well;
determining a fire flooding front edge according to the thickness of a gas injection layer, the porosity of the gas injection layer and the oil saturation of the fire flooding gas injection well and the quantity of crude oil participating in combustion reaction during production of the fire flooding production well;
wherein, obtaining the carbon content participating in the combustion reaction during the production of the fireflood production well comprises:
obtaining the oxygen amount injected by the fireflood gas injection well;
obtaining the oxygen amount output by the fireflood production well;
according to the amount of oxygen injected into the fireflood gas injection well and the amount of oxygen produced by the fireflood production well, the carbon content participating in the combustion reaction during the production of the fireflood production well is obtained;
wherein, according to the carbon content participating in the combustion reaction during the production of the fireflood production well, the crude oil amount participating in the combustion reaction during the production of the fireflood production well is determined, and the method comprises the following steps:
obtaining the heavy hydrocarbon content in the crude oil;
obtaining the carbon content in the heavy hydrocarbon;
determining the amount of crude oil participating in the combustion reaction during the production of the fireflood production well according to the content of heavy hydrocarbon in the crude oil, the content of carbon in the heavy hydrocarbon and the content of carbon participating in the combustion reaction during the production of the fireflood production well;
wherein, the crude oil amount participating in the combustion reaction during the production of the fireflood production well is determined according to the following formula:
wherein, VCrude oilRepresenting the amount of crude oil participating in a combustion reaction during production of the fireflood production well; sHCRepresents the percentage of carbon content in the heavy hydrocarbon; sHRepresents the percentage of heavy hydrocarbons in the crude oil; vC reactionRepresenting the carbon content participating in the combustion reaction when the fireflood production well is producing;
wherein the fireflood front is determined according to the following formula:
wherein L represents the fireflood front; vC reactionRepresenting the carbon content participating in the combustion reaction when the fireflood production well produces; sHCRepresents the percentage of carbon content in the heavy hydrocarbon; sHRepresents the percentage of heavy hydrocarbons in the crude oil; h represents the thickness of a gas injection layer of the fireflood gas injection well; phi represents the porosity of a gas injection layer of the fireflooding gas injection well; sOIndicating the oil saturation of the fireflood gas injection well.
2. A fireflood front determination device, comprising:
the gas injection well parameter obtaining module is used for obtaining the gas injection layer thickness, the gas injection layer porosity and the oil saturation of the fireflood gas injection well;
the production well reaction carbon content obtaining module is used for obtaining the carbon content participating in the combustion reaction during production of the fireflood production well;
the raw oil quantity determining module is used for determining the raw oil quantity participating in the combustion reaction during the production of the fireflood production well according to the carbon content participating in the combustion reaction during the production of the fireflood production well;
the fireflood front determining module is used for determining a fireflood front according to the thickness of a gas injection layer, the porosity of the gas injection layer and the oil saturation of the fireflood gas injection well and the quantity of crude oil participating in a combustion reaction during production of the fireflood production well;
wherein the production well reaction carbon content obtaining module is specifically configured to:
obtaining the oxygen amount injected by the fireflood gas injection well;
obtaining the oxygen amount output by the fireflood production well;
according to the amount of oxygen injected into the fireflood gas injection well and the amount of oxygen produced by the fireflood production well, the carbon content participating in the combustion reaction during the production of the fireflood production well is obtained;
wherein, the crude oil amount determining module is specifically used for:
obtaining the heavy hydrocarbon content in the crude oil;
obtaining the carbon content in the heavy hydrocarbon;
determining the amount of crude oil participating in the combustion reaction during the production of the fireflood production well according to the content of heavy hydrocarbon in the crude oil, the content of carbon in the heavy hydrocarbon and the content of carbon participating in the combustion reaction during the production of the fireflood production well;
wherein, the crude oil quantity determination module is specifically configured to:
determining the amount of crude oil participating in a combustion reaction during production of the fireflood production well according to the following formula:
wherein, VCrude oilRepresenting the amount of crude oil participating in a combustion reaction during production of the fireflood production well; sHCRepresents the percentage of carbon content in the heavy hydrocarbon; sHRepresents the percentage of heavy hydrocarbons in the crude oil; vC reactionRepresenting the carbon content participating in the combustion reaction when the fireflood production well is producing;
the fireflood leading edge determination module is specifically configured to:
the fireflood front is determined as follows:
wherein L represents the fireflood front; vC reactionRepresenting the carbon content participating in the combustion reaction when the fireflood production well is producing; sHCRepresents the percentage of carbon content in the heavy hydrocarbon; sHRepresents the percentage of heavy hydrocarbons in the crude oil; h represents the thickness of a gas injection layer of the fireflood gas injection well; phi represents the porosity of a gas injection layer of the fireflooding gas injection well; sOIndicating the oil saturation of the fireflood gas injection well.
3. A computer device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor implements the fireflood front determination method of claim 1 when executing the computer program.
4. A computer-readable storage medium storing a computer program for executing the fireflood front determination method of claim 1.
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