CN110894782B - Method and device for determining gas storage capacity of oil reservoir and storage medium - Google Patents
Method and device for determining gas storage capacity of oil reservoir and storage medium Download PDFInfo
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Abstract
The invention discloses a method and a device for determining oil reservoir gas storage capacity and a storage medium, and belongs to the technical field of natural gas flooding. The method comprises the following steps: the method comprises the steps of obtaining the gas volume multiple and the ground crude oil density of a target oil reservoir, and the oil production, the water production and the dissolved gas production of a target production cycle of a target natural gas flooding project, and determining the oil reservoir gas storage of the target production cycle according to the gas volume multiple, the ground crude oil density, the oil production, the water production and the dissolved gas production of the target production cycle. The oil reservoir gas storage amount in the target natural gas drive project determined by the method is more in line with the actual change condition of oil reservoir development, the problem that the oil reservoir gas storage amount in the target natural gas drive project is determined inaccurately according to the gas storage rate with a fixed proportion in the prior art is solved, and the determined oil reservoir gas storage amount in the target natural gas drive project can provide data support for subsequently and accurately determining the economic benefit of the target natural gas drive project.
Description
Technical Field
The invention relates to the technical field of natural gas flooding, in particular to a method and a device for determining oil reservoir gas storage capacity and a storage medium.
Background
When natural gas flooding development is performed on an oil reservoir, natural gas can be injected into the oil reservoir in a circulating gas injection mode to supplement the energy of the oil reservoir and improve the oil displacement efficiency of the oil reservoir. During circulating gas injection, in order to realize the stabilization and balance of the energy of the oil deposit, the gas volume of the natural gas injected into the oil deposit is usually larger than the gas volume of the natural gas extracted from the oil deposit, namely, a certain volume of the injected natural gas forms residual gas to be reserved in the oil deposit, and the volume of the residual gas in the oil deposit can be called as the oil deposit gas volume. In a natural gas flooding project, the oil reservoir gas storage amount can be calculated as the production cost in the economic benefit of the natural gas flooding project, so that the determination of the oil reservoir gas storage amount of the natural gas flooding project has an important significance on the economic evaluation of the natural gas flooding project.
At present, when determining the oil reservoir gas storage capacity of a target natural gas flooding project, a technician usually obtains the accumulated oil reservoir gas storage capacity and the accumulated gas injection capacity of the same type of natural gas flooding project, then sets a fixed proportion for the target natural gas flooding project by referring to the obtained proportion of the accumulated oil reservoir gas storage capacity and the accumulated gas injection capacity, and then determines the product of the gas injection capacity of the production cycle and the fixed proportion as the oil reservoir gas storage capacity of the production cycle for each production cycle of the target natural gas flooding project.
However, since the ratio between the gas storage capacity of the oil reservoir and the gas injection capacity of each production cycle may vary due to various production factors during the implementation of the natural gas flooding project, the determined gas storage capacity of the oil reservoir is not accurate enough when the gas storage capacity of the oil reservoir is determined according to the gas injection capacity of each production cycle and the set fixed ratio sum.
Disclosure of Invention
The embodiment of the invention provides a method, a device and a storage medium for determining the gas storage capacity of an oil reservoir, which can solve the problem that the gas storage capacity of the oil reservoir determined according to the prior art is not accurate enough. The technical scheme is as follows:
in a first aspect, there is provided a method of determining reservoir gas reserves, the method comprising:
acquiring the gas volume multiple and the ground crude oil density of a target oil reservoir;
acquiring oil production, water production and dissolved gas production of a target production cycle of a target natural gas flooding project, wherein the target natural gas flooding project is a natural gas flooding project implemented in the target oil reservoir;
and determining the oil deposit gas storage capacity of the target production period according to the gas volume multiple, the ground crude oil density, and the oil production, the water production and the dissolved gas production of the target production period.
Optionally, the determining the reservoir gas reserve of the target production period according to the gas volume multiple and the ground crude oil density, and the oil production, the water production and the dissolved gas production of the target production period comprises:
determining the oil deposit gas storage capacity of the target production period according to the gas volume multiple, the ground crude oil density, and the oil production, the water production and the dissolved gas production of the target production period by the following formula:
wherein, Q issThe reserve gas volume for the target production cycle, said QoFor the oil production of the target production cycle, QgdThe amount of dissolved gas produced for the target production cycle, said QwThe water production amount of the target production cycle, the poAs the density of the crude oil on the ground, thegIs the gas volume multiple.
Optionally, the obtaining the water production of the target production cycle of the target natural gas drive project comprises:
acquiring the average water content of the oil reservoir of the target production period of the target natural gas flooding project;
determining the average oil content of the oil reservoir of the target production period of the target natural gas flooding project according to the average oil reservoir water content of the target production period of the target natural gas flooding project;
determining a ratio of oil production to average oil cut for the target production cycle for the target natural gas flooding project;
and determining the product of the ratio and the average water content of the target production period of the target natural gas flooding project as the water yield of the target production period of the target natural gas flooding project.
Optionally, the obtaining the amount of dissolved gas produced in the target production cycle of the target natural gas flooding project includes:
acquiring the original gas-oil ratio of the target oil reservoir;
and determining the product of the oil production of the target production period of the target natural gas flooding project and the original gas-oil ratio as the dissolved gas production of the target production period of the target natural gas flooding project.
Optionally, after determining the reservoir gas capacity of the target production period according to the gas volume multiple and the ground crude oil density, and the oil production, the water production and the dissolved gas production of the target production period, the method further includes:
determining reservoir gas reserves for a plurality of production cycles of the target natural gas flooding project;
and accumulating the oil deposit gas storage quantities of the plurality of production periods to obtain the accumulated oil deposit gas storage quantity of the target natural gas drive project.
Optionally, after the step of accumulating the oil reservoir gas storage volumes of the multiple production cycles to obtain the accumulated oil reservoir gas storage volume of the target natural gas flooding project, the method further includes:
acquiring the gas injection amount of each production period in the plurality of production periods;
accumulating the gas injection quantities of the plurality of production periods to obtain the accumulated gas injection quantity of the target natural gas flooding project;
and determining the ratio of the accumulated oil reservoir gas storage amount of the target natural gas flooding project to the accumulated gas injection amount of the target natural gas flooding project as the oil reservoir gas storage rate of the target natural gas flooding project.
In a second aspect, there is provided an apparatus for determining reservoir gas reserves, the apparatus comprising:
the first acquisition module is used for acquiring the gas volume multiple and the ground crude oil density of a target oil reservoir;
the second acquisition module is used for acquiring the oil production, the water production and the dissolved gas production of a target production cycle of a target natural gas flooding project, wherein the target natural gas flooding project is a natural gas flooding project implemented in the target oil reservoir;
and the first determining module is used for determining the oil deposit gas storage capacity of the target production period according to the gas volume multiple, the ground crude oil density, the oil production amount, the water production amount and the dissolved gas production amount of the target production period.
Optionally, the first determining module is specifically configured to:
determining the oil deposit gas storage capacity of the target production period according to the gas volume multiple, the ground crude oil density, and the oil production, the water production and the dissolved gas production of the target production period by the following formula:
wherein, Q issThe reserve gas volume for the target production cycle, said QoFor the oil production of the target production cycle, QgdThe amount of dissolved gas produced for the target production cycle, said QwThe water production amount of the target production cycle, the poAs the density of the crude oil on the ground, thegIs the gas volume multiple.
Optionally, the second obtaining module includes:
the first acquisition unit is used for acquiring the average water content of the oil reservoir in the target production period of the target natural gas flooding project;
the first determination unit is used for determining the average oil content of the oil reservoir in the target production period of the target natural gas flooding project according to the average oil reservoir water content in the target production period of the target natural gas flooding project;
a second determination unit for determining a ratio of oil production to average oil content of the target production cycle of the target natural gas flooding project;
and a third determination unit, configured to determine a product of the ratio and the average water content of the target production cycle of the target natural gas flooding project as the water yield of the target production cycle of the target natural gas flooding project.
Optionally, the second obtaining module includes:
the second acquisition unit is used for acquiring the original gas-oil ratio of the target oil reservoir;
and the fourth determination unit is used for determining the product of the oil production of the target production period of the target natural gas flooding project and the original gas-oil ratio as the dissolved gas production of the target production period of the target natural gas flooding project.
Optionally, the apparatus further comprises:
the second determination module is used for determining the oil deposit gas storage amount of a plurality of production periods of the target natural gas flooding project;
and the first calculation module is used for accumulating the oil deposit gas storage quantities in the multiple production periods to obtain the accumulated oil deposit gas storage quantity of the target natural gas drive project.
Optionally, the apparatus further comprises:
the third acquisition module is used for acquiring the gas injection amount of each production cycle in the plurality of production cycles;
the second calculation module is used for accumulating the gas injection quantities in the multiple production periods to obtain the accumulated gas injection quantity of the target natural gas flooding project;
and the third determining module is used for determining the ratio of the accumulated oil reservoir gas storage amount of the target natural gas flooding project to the accumulated gas injection amount of the target natural gas flooding project as the oil reservoir gas storage rate of the target natural gas flooding project.
In a third aspect, there is provided an apparatus for determining reservoir gas reserves, the apparatus comprising:
a processor and a memory for storing processor-executable instructions;
wherein the processor is configured to perform any of the methods of the first aspect above.
In a fourth aspect, a computer-readable storage medium is provided, in which a computer program is stored, which, when executed by a processor, implements any of the methods provided in the first aspect above.
The technical scheme provided by the embodiment of the invention at least has the following beneficial effects: in the embodiment of the invention, the oil reservoir gas storage capacity of the target production period can be determined according to the gas volume multiple, the original gas-oil ratio and the ground crude oil density of the target oil reservoir and the oil production, water production and dissolved gas production of the target production period of the target natural gas flooding project implemented in the target oil reservoir, namely, the oil reservoir gas storage capacity of each production period can be calculated according to the change conditions of oil reservoir parameters, oil production and the like in the actual production process, so that the calculated oil reservoir gas storage capacity is more consistent with the actual change condition of oil reservoir development, the accuracy is higher, and the problem that the oil reservoir gas storage capacity of each production period is inaccurate when a technician determines the oil reservoir gas storage capacity of each production period according to the gas storage capacity of a fixed proportion is solved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method for determining the gas storage capacity of a reservoir according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of another method for determining reservoir gas storage according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an apparatus for determining the gas storage capacity of a reservoir according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a terminal 400 according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Before explaining the embodiments of the present invention in detail, terms related to the embodiments of the present invention will be explained.
Volume multiple of gas
The volume multiple of gas is 1m3The ratio of the volume of the natural gas under the reservoir conditions to the volume of the natural gas in the ground standard state (20 ℃, 0.1 MPa).
Density of crude oil on ground
The surface crude density refers to the crude mass per cubic meter under standard conditions (20 ℃, 0.1 MPa).
Dissolved gas
Dissolved gas refers to natural gas present in dissolved state in crude oil or water.
Average water content of oil reservoir
The average water cut of a reservoir refers to the ratio of the total water production to the total liquid production in the reservoir over a production cycle.
Average oil content of oil reservoir
The average oil content of the oil reservoir refers to the ratio of the total oil production to the total liquid production in the oil reservoir in one production cycle.
Original gas-oil ratio
The original gas-oil ratio is the ratio of the volume of the separated gas to the volume of the degassed crude oil after the primary degassing of the produced crude oil on the ground.
FIG. 1 is a schematic flow chart of a method for determining the gas storage capacity of a reservoir according to an embodiment of the present invention. Referring to fig. 1, the method comprises the steps of:
step 101: and acquiring the gas volume multiple and the ground crude oil density of the target oil reservoir.
Step 102: and acquiring the oil production, the water production and the dissolved gas production of a target production cycle of a target natural gas flooding project, wherein the target natural gas flooding project is a natural gas flooding project implemented in a target oil reservoir.
Step 103: and determining the oil deposit gas storage capacity of the target production period according to the gas volume multiple, the ground crude oil density, and the oil production, the water production and the dissolved gas production of the target production period.
In the embodiment of the invention, the oil reservoir gas storage capacity of the target production period can be determined according to the gas volume multiple, the original gas-oil ratio and the ground crude oil density of the target oil reservoir and the oil production, water production and dissolved gas production of the target production period of the target natural gas flooding project implemented in the target oil reservoir, namely, the oil reservoir gas storage capacity of each production period can be calculated according to the change conditions of oil reservoir parameters, oil production and the like in the actual production process, so that the calculated oil reservoir gas storage capacity is more consistent with the actual change condition of oil reservoir development, the accuracy is higher, and the problem that the oil reservoir gas storage capacity of each production period is inaccurate when a technician determines the oil reservoir gas storage capacity of each production period according to the gas storage capacity of a fixed proportion is solved.
Optionally, determining the oil deposit gas storage capacity of the target production period according to the gas volume multiple and the ground crude oil density, and the oil production, the water production and the dissolved gas production of the target production period, and comprises:
determining the oil deposit gas storage capacity of the target production period according to the gas volume multiple, the ground crude oil density, the oil production, the water production and the dissolved gas production of the target production period by the following formula:
wherein Q issReservoir gas reserve, Q, for a target production cycleoOil production for a target production cycle, QgdAmount of dissolved gas produced for target production cycle, QwWater production for a target production cycle, poIs the density of the crude oil at the surface, BgIs a gas volume multiple.
Optionally, obtaining a target production cycle water production for the target natural gas drive project comprises:
acquiring the average water content of an oil reservoir in a target production period of a target natural gas flooding project;
determining the average oil content of the oil reservoir in the target production period of the target natural gas flooding project according to the average oil reservoir water content in the target production period of the target natural gas flooding project;
determining the ratio of the oil production and the average oil content of a target production period of a target natural gas flooding project;
and determining the product of the ratio and the average water content of the target production period of the target natural gas flooding project as the water yield of the target production period of the target natural gas flooding project.
Optionally, obtaining a dissolved gas production amount of a target production cycle of a target natural gas flooding project comprises:
acquiring an original gas-oil ratio of a target oil reservoir;
and determining the product of the oil yield of the target production period of the target natural gas flooding project and the original gas-oil ratio as the dissolved gas yield of the target production period of the target natural gas flooding project.
Optionally, after determining the oil deposit gas storage capacity of the target production period according to the gas volume multiple and the ground crude oil density, and the oil production, the water production and the dissolved gas production of the target production period, the method further includes:
determining oil reservoir gas storage volumes of a plurality of production periods of a target natural gas flooding project;
and accumulating the oil reservoir gas storage capacity of a plurality of production periods to obtain the accumulated oil reservoir gas storage capacity of the target natural gas flooding project.
Optionally, after the oil reservoir gas storage amounts of a plurality of production cycles are accumulated to obtain the accumulated oil reservoir gas storage amount of the target natural gas flooding project, the method further includes:
acquiring the gas injection amount of each production period in a plurality of production periods;
accumulating the gas injection quantities in a plurality of production periods to obtain the accumulated gas injection quantity of the target natural gas flooding project;
and determining the ratio of the accumulated oil reservoir gas storage amount of the target natural gas flooding project to the accumulated gas injection amount of the target natural gas flooding project as the oil reservoir gas storage rate of the target natural gas flooding project.
All the above optional technical solutions can be combined arbitrarily to form an optional embodiment of the present invention, which is not described in detail herein.
Fig. 2 is a schematic flowchart of another method for determining the gas storage capacity of an oil reservoir according to an embodiment of the present invention, where the method may be applied to a terminal, and the terminal may be a mobile phone, a tablet computer, a computer, or the like. Referring to fig. 2, the method comprises the steps of:
step 201: and acquiring the gas volume multiple and the ground crude oil density of the target oil reservoir.
The target oil deposit is the oil deposit where the target natural gas flooding project is located, and the target natural gas flooding project is the natural gas flooding project of the oil deposit gas storage amount to be detected.
Wherein the gas volume multiple is 1m3The ratio of the volume of the natural gas under the reservoir conditions to the volume of the natural gas in the ground standard state (20 ℃, 0.1 MPa). In practical application, the gas volume multiple can be obtained by user input, can also be obtained by sending of other equipment, and can also be obtained by analyzing experimental data of the gas volume multiple. For example, in a gas volume multiple experiment, 1m is obtained3According to a volume of 1m of natural gas under reservoir conditions and a gas volume under an experimental environment of 0.1MPa at 20 DEG C3The ratio of the volume of the natural gas under the oil reservoir condition to the volume of the natural gas under the experimental environment is used for determining the gas volume multiple.
Wherein the surface crude oil density refers to the crude oil mass per cubic meter under standard conditions (20 ℃, 0.1 MPa). In practical application, the density of the crude oil on the ground can be obtained by inputting by a user, can be obtained by transmitting by other equipment, and can also be obtained by analyzing experimental data of the density of the crude oil on the ground. For example, the crude oil mass per cubic meter at an experimental environment of 20 ℃ and 0.1MPa is obtained, and the ground crude oil density is determined from the obtained crude oil mass per cubic meter.
Alternatively, the gas volume multiple and the surface crude oil density of the target reservoir at the beginning of the natural gas drive project may be used as the gas volume multiple and the surface crude oil density of the target reservoir per production cycle of the natural gas drive project, since the gas volume multiple and the surface crude oil density of the target reservoir do not change with the production cycle of the natural gas drive project.
After the gas volume multiple and the ground crude oil density of the target oil reservoir are obtained, the oil yield, the water yield and the dissolved gas yield of the target production cycle of the target natural gas flooding project can be further obtained, so that the oil reservoir gas yield of the target production cycle can be determined according to the gas volume multiple and the ground crude oil density of the target oil reservoir and the oil yield, the water yield and the dissolved gas yield of the target production cycle of the target natural gas flooding project.
Step 202: and acquiring the oil production, the water production and the dissolved gas production of a target production cycle of a target natural gas flooding project, wherein the target natural gas flooding project is a natural gas flooding project implemented in a target oil reservoir.
It should be noted that the target production cycle is a production cycle of the oil reservoir gas storage amount to be determined, and specifically may be any production cycle of the target natural gas flooding project, and the duration of each production cycle may be one day, one week, one month, one year, or the like, which is not limited in the embodiment of the present invention. Moreover, the target production cycle may be a production cycle in which the target natural gas flooding project is produced, or may be a production cycle in which production is not produced. When the production cycle is a production cycle in which production is performed, the oil production amount, the water production amount, and the dissolved gas production amount of the target production cycle can be obtained according to the actual production process of the target production cycle, and when the production cycle is a production cycle in which production is not performed, the oil production amount, the water production amount, and the dissolved gas production amount of the target production cycle can be obtained by predicting the production process of the target production cycle.
Alternatively, before the oil yield, the water yield and the dissolved gas yield of the target production cycle of the target natural gas flooding project are obtained, the physical property parameter of the oil deposit of the target oil deposit, the fluid property parameter, the target production cycle of the target natural gas flooding project and the ground gas injection quantity of the target production cycle may be obtained, and then the oil yield, the water yield and the dissolved gas yield of the target production cycle of the target natural gas flooding project may be determined according to the physical property parameter of the oil deposit of the target oil deposit, the fluid property parameter, the target production cycle of the target natural gas flooding project and the ground gas injection quantity of the target production cycle.
Specifically, the oil deposit physical property parameters, the fluid property parameters, the target production period of the target natural gas flooding project and the ground gas injection quantity of the target production period of the target natural gas flooding project can be subjected to simulation operation through oil deposit numerical simulation software, so that the oil yield, the water yield and the dissolved gas yield of the target production period of the target natural gas flooding project are obtained. The numerical reservoir simulation software can be Eclipse and the like, the reservoir physical parameters of the target reservoir can include reservoir temperature, reservoir pressure and the like, and the fluid property parameters of the target reservoir can include crude oil-gas ratio, ground crude oil density, relative density, gas volume multiple, gas compression factor and the like.
Table 1 shows a plurality of specific parameters included in the petrophysical and fluid property parameters of the target reservoir, wherein a first column shows the name of each parameter, a second column shows the symbol characterizing each parameter, a third column shows the units of each parameter, and a fourth column shows an exemplary parameter value of each parameter.
TABLE 1
The target production period and the ground gas injection amount of the target natural gas flooding project as well as the oil deposit physical property parameter and the fluid property parameter of the target oil deposit shown in the table 1 are input into the oil deposit numerical simulation software, the oil deposit numerical simulation software can perform simulation operation on the input parameters, and the oil production amount, the water content and the total gas production amount of the determined target natural gas flooding project in the target production period are shown in the table 2. The first column of table 2 shows a plurality of target production cycles of the target natural gas flooding project, the second column shows gas injection quantities of the target natural gas flooding project input by the reservoir numerical simulation software in the plurality of target production cycles, the third column shows oil production quantities of the target natural gas flooding project determined by the reservoir numerical simulation software in the plurality of target production cycles, the fourth column shows average reservoir water content of the target natural gas flooding project determined by the reservoir numerical simulation software in the plurality of target production cycles, and the fifth column shows total gas production quantity of the target natural gas flooding project determined by the reservoir numerical simulation software in the plurality of target production cycles.
TABLE 2
As can be seen from table 2, the reservoir numerical simulation software can determine the gas injection amount, the oil production amount, the average water content of the reservoir and the total gas production amount of the target natural gas flooding project within 25 production cycles according to the reservoir physical parameters and the fluid property parameters of the target reservoir shown in table 1.
It should be noted that the parameter values of the petrophysical parameters and the fluid property parameters of the target oil reservoir shown in tables 1 and 2, and the gas injection rate, the oil production rate, the average water cut of the oil reservoir, and the total gas production rate of the target natural gas flooding project output by the reservoir numerical simulation software according to the parameters shown in table 1 in 25 production cycles are exemplary data given by the embodiment of the present invention, and do not constitute the parameter values of the petrophysical parameters and the fluid property parameters of the target oil reservoir, and specific limitations on the gas injection rate, the oil production rate, the average water cut of the oil reservoir, and the total gas production rate in a plurality of production cycles.
In addition, the oil deposit numerical simulation software can be set to directly determine the oil yield, the water yield and the dissolved gas yield of the target production period of the target natural gas flooding project according to the oil deposit physical property parameter and the parameter value of the fluid property parameter of the target oil deposit, the annual gas injection quantity parameter on the ground and the target production period parameter of the target natural gas flooding project, or the oil deposit numerical simulation software can determine the oil yield and the average water content of the oil deposit first and then determine the oil yield, the water yield and the dissolved gas yield of the target production period of the target natural gas flooding project according to the oil yield, the average water content of the oil deposit and the original gas-oil ratio.
Alternatively, when the output result of the numerical reservoir simulation software is the oil production and the average water content of the reservoir, the water production and the dissolved gas production of the target production period of the target natural gas flooding project can be determined according to the following steps.
Specifically, when the water yield of the target production cycle of the target natural gas flooding project is determined, the average water content of the oil reservoir of the target production cycle of the target natural gas flooding project can be obtained; determining the average oil content of the oil reservoir in the target production period of the target natural gas flooding project according to the average oil reservoir water content in the target production period of the target natural gas flooding project; determining the ratio of the oil production and the average oil content of a target production period of a target natural gas flooding project; and determining the product of the ratio and the average water content of the target production period of the target natural gas flooding project as the water yield of the target production period of the target natural gas flooding project.
Wherein, the average water content of the oil reservoir refers to the percentage of the ratio of the total water production to the total liquid production in the oil reservoir in one production period. In practical application, the average water content of the oil reservoir can be obtained by user input, can also be obtained by sending of other terminals, and can also be obtained by analyzing of numerical reservoir simulation software by the terminals. For example, the parameter values of the reservoir physical property parameter and the fluid property parameter of the target reservoir, the annual surface gas injection quantity parameter and the target production cycle parameter of the target natural gas flooding project can be input into the reservoir numerical simulation software, and the average water content of the reservoir can be determined by obtaining the simulation result of the reservoir numerical simulation software.
Wherein, the average oil content of the oil reservoir refers to the percentage of the ratio of the total oil production to the total liquid production in the oil reservoir in one production period. In practical application, the average oil content of the oil reservoir can be obtained by user input, can also be obtained by sending of other terminals, and can also be obtained by the terminals according to analysis of the average oil content of the oil reservoir. For example, after the terminal obtains the average moisture content of the oil reservoir, the difference between 1 and the average moisture content of the oil reservoir may be determined as the average oil content of the oil reservoir.
It should be noted that the liquid production amount in the target production period of the target natural gas flooding project is composed of the oil production amount and the water production amount when the degassing is not performed, so that after the terminal acquires the average water content and the oil production amount of the oil reservoir in the target production period of the target natural gas flooding project, the water production amount in the target production period of the target natural gas flooding project can be determined through the following formula (2).
Qw＝Qofw/(1-fw) (2)
Wherein Q iswWater production for a target production cycle for a target natural gas flooding project, fwAverage water cut, Q, of reservoir for target production cycle for target natural gas drive projectoThe oil production for the target production cycle for the target natural gas flooding project.
Specifically, when the dissolved gas production rate of the target production cycle of the target natural gas flooding project is determined, the original gas-oil ratio of the target oil reservoir may be obtained, and the product of the oil production rate of the target production cycle of the target natural gas flooding project and the original gas-oil ratio is determined as the dissolved gas production rate of the target production cycle of the target natural gas flooding project.
The original gas-oil ratio refers to the ratio of the volume of the separated gas to the volume of the degassed crude oil after the primary degassing of the produced crude oil on the ground. In practical application, the original gas-oil ratio may be obtained by user input or may be obtained by sending from other terminals, which is not specifically limited in the embodiment of the present invention.
The dissolved gas is natural gas existing in a dissolved state in crude oil or water, and the dissolved gas yield is natural gas yield obtained by degassing crude oil produced in a target production cycle of a target natural gas flooding project. In practical application, the dissolved gas production amount can be obtained by user input, can also be obtained by sending of other terminals, and can also be determined by the terminal according to the original gas-oil ratio of the target oil reservoir and the oil production amount of the target production cycle of the target natural gas drive project. For example, the oil yield and the original gas-oil ratio of the target production cycle of the target natural gas flooding project are obtained, and the product of the oil yield and the original gas-oil ratio of the target production cycle of the target natural gas flooding project is determined as the dissolved gas yield of the target production cycle of the target natural gas flooding project.
Step 203: and determining the oil deposit gas storage capacity of the target production period according to the gas volume multiple, the ground crude oil density, and the oil production, the water production and the dissolved gas production of the target production period.
After the gas volume multiple, the ground crude oil density, and the oil yield, the water yield and the dissolved gas yield of the target production period are obtained, the oil deposit gas storage of the target production period can be determined according to the gas volume multiple, the ground crude oil density, the oil yield, the water yield and the dissolved gas yield of the target production period.
In one possible implementation, after obtaining the gas volume multiple and the ground crude oil density, and the oil production, water production, and dissolved gas production of the target production cycle, the reservoir gas storage of the target production cycle may be determined by the following equation (3):
wherein Q issReservoir gas reserve, Q, for a target production cycleoOil production for a target production cycle, QgdAmount of dissolved gas produced for target production cycle, QwWater production for a target production cycle, poIs the density of the crude oil at the surface, BgIs a gas volume multiple.
Taking a natural gas flooding project as an example, table 3 shows the gas volume multiple and the ground crude oil density obtained from the natural gas flooding project, the oil production, the water production, and the dissolved gas production of a plurality of target production periods, and the reservoir gas storage of a plurality of target production periods of the natural gas flooding project determined by the formula (3). Wherein the first column shows a target production cycle of the natural gas flooding project, the second column shows an oil production amount of each of a plurality of target production cycles of the natural gas flooding project, the third column shows a dissolved gas production amount of each of the plurality of target production cycles of the natural gas flooding project, the fourth column shows a water production amount of each of the plurality of target production cycles of the natural gas flooding project, the fifth column shows a gas volume multiple, the sixth column shows a surface crude oil density, and the seventh column shows a reserve gas amount of the plurality of target production cycles of the natural gas flooding project determined by the formula (3).
TABLE 3
As can be seen from table 3, after the gas volume multiple and the ground crude oil density in each target production cycle in the multiple target production cycles of the natural gas flooding project, and the oil yield, the water yield and the dissolved gas yield in the target production cycle are obtained, the oil deposit gas yield in the target production cycle can be determined according to the formula (3) based on the gas volume multiple and the ground crude oil density in each target production cycle in the multiple target production cycles of the natural gas flooding project, and the oil yield, the water yield and the dissolved gas yield in the target production cycle. And along with the extension of the target production period, the gas reservoir gas storage amount in the natural gas flooding project can be gradually reduced until the gas reservoir gas storage amount becomes a negative number, namely, at the later stage of the natural gas flooding project, the gas amount of the extracted natural gas can be more than that of the injected natural gas, so that when the natural gas flooding is carried out by adopting a circulating gas injection mode, the gas reservoir can not be formed in the oil reservoir.
It should be noted that the target production cycle, oil production, dissolved gas production, water production, gas volume multiple, surface crude oil density, and reservoir gas storage shown in table 3 above are exemplary data given in the embodiment of the present invention, and the given exemplary data do not constitute specific limitations on the target production cycle, oil production, dissolved gas production, water production, gas volume multiple, surface crude oil density, and reservoir gas storage.
And 204, determining the oil reservoir gas storage rate of the target natural gas flooding project according to the ratio of the accumulated oil reservoir gas storage rate of the target natural gas flooding project to the accumulated gas injection rate of the target natural gas flooding project.
The accumulated oil deposit gas storage capacity refers to the sum of the oil deposit gas storage capacities of a plurality of target production periods in the implementation process of the target natural gas flooding project from the beginning to the end. The accumulated gas injection amount refers to the sum of gas injection amounts of a plurality of target production cycles in the process from the beginning to the end of the target natural gas flooding project.
Specifically, when determining the accumulated oil reservoir gas storage capacity, the oil reservoir gas storage capacity of each production cycle in multiple production cycles of the target natural gas flooding project may be determined, and then the oil reservoir gas storage capacities of the multiple production cycles are accumulated to obtain the accumulated oil reservoir gas storage capacity of the target natural gas flooding project. When determining the accumulated gas injection quantity, the gas injection quantity of each production cycle in the multiple production cycles can be obtained first, and then the gas injection quantities of the multiple production cycles are accumulated to obtain the accumulated gas injection quantity of the target natural gas flooding project.
In the prior art, the oil reservoir gas storage rate of each production cycle in a plurality of production cycles is determined according to the product of an artificially set fixed proportion oil reservoir gas storage rate and the gas injection amount of the production cycle, but in the actual production process, the oil reservoir gas storage rate of a target production cycle changes along with the change of the crude oil yield, so that when the gas injection amount of each production cycle in the plurality of production cycles is the same, the oil reservoir gas storage rate of each production cycle in the plurality of production cycles also changes along with the change of the crude oil yield and is not a fixed value, but the invention determines the oil reservoir gas storage rate of each production cycle according to the parameters of oil reservoir parameters, target production cycle, gas injection amount, oil production amount and the like in the actual production process, and determines the oil reservoir gas storage rate of each production cycle and the oil reservoir gas storage rate of a target natural gas drive item according to the oil reservoir gas storage rate and the gas injection amount of each production cycle, the determined result is more in line with the actual change condition of oil reservoir development, and the accuracy is higher.
After the cumulative oil reservoir gas storage amount of the target natural gas flooding project and the cumulative gas injection amount of the target natural gas flooding project are obtained, the ratio of the cumulative oil reservoir gas storage amount of the target natural gas flooding project to the cumulative gas injection amount of the target natural gas flooding project can be determined according to the following formula (4).
η＝Qcum/Qinj (4)
Wherein eta is a target natural gas flooding termTarget reservoir gas storage rate, QcumCumulative reservoir gas reserves, Q, for a target natural gas drive projectinjThe cumulative gas injection quantity for the target natural gas flooding project.
For example, for a natural gas flooding project, 25 production target periods are passed from the beginning to the end of the execution, and the reservoir gas storage and injection quantities for each of the 25 production target periods can be as shown in table 4. Where the first column of table 4 shows the production target periods for the natural gas flooding project, the second column shows the reservoir gas storage for each of the 25 production target periods, and the third column shows the gas injection for each of the 25 production target periods.
TABLE 4
| Target production cycle | Amount of gas injected | Oil reservoir gas storage capacity |
| Year of year | ×104m3 | ×104m3 |
| 1 | 3000 | 2734 |
| 2 | 3000 | 2613 |
| 3 | 3000 | 2462 |
| 4 | 3000 | 2593 |
| 5 | 3000 | 2313 |
| 6 | 3000 | 1472 |
| 7 | 3000 | 1480 |
| 8 | 3000 | 1369 |
| 9 | 3000 | 1357 |
| 10 | 3000 | 1283 |
| 11 | 3000 | 1167 |
| 12 | 3000 | 1081 |
| 13 | 3000 | 1001 |
| 14 | 3000 | 1001 |
| 15 | 3000 | 970 |
| 16 | 3000 | 884 |
| 17 | 3000 | 792 |
| 18 | 3000 | 712 |
| 19 | 3000 | 620 |
| 20 | 3000 | 571 |
| 21 | 0 | -2170 |
| 22 | 0 | -2056 |
| 23 | 0 | -1791 |
| 24 | 0 | -1612 |
| 25 | 0 | -1373 |
Adding the gas injection quantity and the oil reservoir gas storage quantity of 25 production cycles shown in the table 4 to obtain the cumulative oil reservoir gas storage quantity of the natural gas flooding project of 19473 multiplied by 104m3Cumulative gas injection amount of 60000X 104m3Therefore, according to the formula (4), the reservoir gas storage rate η of the target natural gas flooding term is determined to be 19473 × 104/60000×104＝0.32455。
In the embodiment of the invention, the oil reservoir gas storage capacity of the target production period can be determined according to the gas volume multiple, the original gas-oil ratio, the ground crude oil density of the target oil reservoir and the oil production, water production and dissolved gas production of the target production period of the target natural gas drive project implemented in the target oil reservoir, that is, the oil reservoir gas storage capacity of each production period can be calculated according to the variation conditions of oil reservoir parameters, oil production and the like in the actual production process, so that the calculated oil reservoir gas storage capacity is more consistent with the actual variation condition of oil reservoir development, the accuracy is higher, and the problem that the oil reservoir gas storage capacity of each production period is inaccurate when a technician determines the oil reservoir gas storage capacity of each production period according to the gas storage capacity of a fixed proportion is solved. And after the oil reservoir gas storage amount of the target production period is determined, the oil reservoir gas storage rate of the natural gas flooding project can be determined according to the oil reservoir gas storage amounts of the target production periods of the natural gas flooding project and the gas injection amounts of the target production periods of the natural gas flooding project, and the determined result is more in line with the actual change condition of oil reservoir development.
Fig. 3 is a schematic structural diagram of an apparatus for determining the gas storage capacity of a reservoir according to an embodiment of the present invention. Referring to fig. 3, the apparatus may include:
the first obtaining module 301 is used for obtaining the gas volume multiple and the ground crude oil density of the target oil reservoir.
A second obtaining module 302, configured to obtain an oil yield, a water yield, and a dissolved gas yield of a target production cycle of a target natural gas flooding project, where the target natural gas flooding project is a natural gas flooding project implemented in a target oil reservoir.
And the first determining module 303 is configured to determine the oil reservoir gas storage capacity of the target production period according to the gas volume multiple, the ground crude oil density, and the oil production, the water production, and the dissolved gas production of the target production period.
Optionally, the first determining module is specifically configured to:
determining the oil deposit gas storage capacity of the target production period according to the gas volume multiple, the ground crude oil density, the oil production, the water production and the dissolved gas production of the target production period by the following formula:
wherein Q issReservoir gas reserve, Q, for a target production cycleoOil production for a target production cycle, QgdAmount of dissolved gas produced for target production cycle, QwWater production for a target production cycle, poIs the density of the crude oil at the surface, BgIs a gas volume multiple.
Optionally, the second obtaining module includes:
the first acquisition unit is used for acquiring the average water content of the oil reservoir in the target production period of the target natural gas flooding project;
the first determination unit is used for determining the average oil content of the oil reservoir in the target production period of the target natural gas flooding project according to the average oil reservoir water content in the target production period of the target natural gas flooding project;
the second determination unit is used for determining the ratio of the oil production and the average oil content of the target production period of the target natural gas flooding project;
and a third determination unit, which is used for determining the product of the ratio and the average water content of the target production period of the target natural gas flooding project as the water yield of the target production period of the target natural gas flooding project.
Optionally, the second obtaining module includes:
the second acquisition unit is used for acquiring the original gas-oil ratio of the target oil reservoir;
and the fourth determination unit is used for determining the product of the oil production of the target production period of the target natural gas flooding project and the original gas-oil ratio as the dissolved gas production of the target production period of the target natural gas flooding project.
Optionally, the apparatus further comprises:
the second determination module is used for determining the oil reservoir gas storage amount of a plurality of production periods of the target natural gas flooding project;
and the first calculation module is used for accumulating the oil deposit gas storage capacity of a plurality of production periods to obtain the accumulated oil deposit gas storage capacity of the target natural gas flooding project.
Optionally, the apparatus further comprises:
the third acquisition module is used for acquiring the gas injection amount of each production cycle in a plurality of production cycles;
the second calculation module is used for accumulating the gas injection quantities in a plurality of production periods to obtain the accumulated gas injection quantity of the target natural gas flooding project;
and the third determining module is used for determining the ratio of the accumulated oil reservoir gas storage amount of the target natural gas flooding project to the accumulated gas injection amount of the target natural gas flooding project as the oil reservoir gas storage rate of the target natural gas flooding project.
The technical scheme provided by the embodiment of the invention at least has the following beneficial effects: in the embodiment of the invention, the oil reservoir gas storage capacity of the target production period can be determined according to the gas volume multiple, the original gas-oil ratio and the ground crude oil density of the target oil reservoir and the oil production, water production and dissolved gas production of the target production period of the target natural gas flooding project implemented in the target oil reservoir, namely, the oil reservoir gas storage capacity of each production period can be calculated according to the change conditions of oil reservoir parameters, oil production and the like in the actual production process, so that the calculated oil reservoir gas storage capacity is more consistent with the actual change condition of oil reservoir development, the accuracy is higher, and the problem that the oil reservoir gas storage capacity of each production period is inaccurate when a technician determines the oil reservoir gas storage capacity of each production period according to the gas storage capacity of a fixed proportion is solved.
It should be noted that: in the device for determining the gas storage capacity of the oil reservoir provided in the above embodiment, when determining the gas storage capacity of the oil reservoir, only the division of the above functional modules is taken as an example, and in practical application, the function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules, so as to complete all or part of the functions described above. In addition, the device for determining the gas storage capacity of the oil reservoir and the method for determining the gas storage capacity of the oil reservoir provided by the embodiment belong to the same concept, and specific implementation processes are detailed in the method embodiment and are not repeated herein.
Fig. 4 is a schematic structural diagram of a terminal 400 according to an embodiment of the present invention. The terminal 400 may be: a smart phone, a tablet computer, an MP3 player (Moving Picture Experts Group Audio Layer III, motion video Experts compression standard Audio Layer 3), an MP4 player (Moving Picture Experts Group Audio Layer IV, motion video Experts compression standard Audio Layer 4), a notebook computer, or a desktop computer. The terminal 400 may also be referred to by other names such as user equipment, portable terminal, laptop terminal, desktop terminal, etc.
Generally, the terminal 400 includes: a processor 401 and a memory 402.
In some embodiments, the terminal 400 may further optionally include: a peripheral interface 403 and at least one peripheral. The processor 401, memory 402 and peripheral interface 403 may be connected by bus or signal lines. Each peripheral may be connected to the peripheral interface 403 via a bus, signal line, or circuit board. Specifically, the peripheral device includes: at least one of a radio frequency circuit 404, a touch screen display 404, a camera 406, an audio circuit 407, a positioning component 408, and a power supply 409.
The peripheral interface 403 may be used to connect at least one peripheral related to I/O (Input/Output) to the processor 401 and the memory 402. In some embodiments, processor 401, memory 402, and peripheral interface 403 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 401, the memory 402 and the peripheral interface 403 may be implemented on a separate chip or circuit board, which is not limited by this embodiment.
The Radio Frequency circuit 404 is used for receiving and transmitting RF (Radio Frequency) signals, also called electromagnetic signals. The radio frequency circuitry 404 communicates with communication networks and other communication devices via electromagnetic signals. The rf circuit 404 converts an electrical signal into an electromagnetic signal to transmit, or converts a received electromagnetic signal into an electrical signal. Optionally, the radio frequency circuit 404 includes: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a subscriber identity module card, and so forth. The radio frequency circuitry 404 may communicate with other terminals via at least one wireless communication protocol. The wireless communication protocols include, but are not limited to: metropolitan area networks, various generation mobile communication networks (2G, 3G, 4G, and 4G), Wireless local area networks, and/or WiFi (Wireless Fidelity) networks. In some embodiments, the rf circuit 404 may further include NFC (Near Field Communication) related circuits, which are not limited in this application.
The display screen 404 is used to display a UI (User Interface). The UI may include graphics, text, icons, video, and any combination thereof. When the display screen 405 is a touch display screen, the display screen 405 also has the ability to capture touch signals on or over the surface of the display screen 405. The touch signal may be input to the processor 401 as a control signal for processing. At this point, the display screen 405 may also be used to provide virtual buttons and/or a virtual keyboard, also referred to as soft buttons and/or a soft keyboard. In some embodiments, the display screen 405 may be one, providing the front panel of the terminal 400; in other embodiments, the display screen 405 may be at least two, respectively disposed on different surfaces of the terminal 400 or in a folded design; in still other embodiments, the display 405 may be a flexible display disposed on a curved surface or a folded surface of the terminal 400. Even further, the display screen 405 may be arranged in a non-rectangular irregular pattern, i.e. a shaped screen. The Display screen 405 may be made of LCD (Liquid Crystal Display), OLED (Organic Light-Emitting Diode), and other materials.
The camera assembly 406 is used to capture images or video. Optionally, camera assembly 406 includes a front camera and a rear camera. Generally, a front camera is disposed at a front panel of the terminal, and a rear camera is disposed at a rear surface of the terminal. In some embodiments, the number of the rear cameras is at least two, and each rear camera is any one of a main camera, a depth-of-field camera, a wide-angle camera and a telephoto camera, so that the main camera and the depth-of-field camera are fused to realize a background blurring function, and the main camera and the wide-angle camera are fused to realize panoramic shooting and VR (Virtual Reality) shooting functions or other fusion shooting functions. In some embodiments, camera assembly 406 may also include a flash. The flash lamp can be a monochrome temperature flash lamp or a bicolor temperature flash lamp. The double-color-temperature flash lamp is a combination of a warm-light flash lamp and a cold-light flash lamp, and can be used for light compensation at different color temperatures.
The audio circuit 407 may include a microphone and a speaker. The microphone is used for collecting sound waves of a user and the environment, converting the sound waves into electric signals, and inputting the electric signals to the processor 401 for processing, or inputting the electric signals to the radio frequency circuit 404 for realizing voice communication. For the purpose of stereo sound collection or noise reduction, a plurality of microphones may be provided at different portions of the terminal 400. The microphone may also be an array microphone or an omni-directional pick-up microphone. The speaker is used to convert electrical signals from the processor 401 or the radio frequency circuit 404 into sound waves. The loudspeaker can be a traditional film loudspeaker or a piezoelectric ceramic loudspeaker. When the speaker is a piezoelectric ceramic speaker, the speaker can be used for purposes such as converting an electric signal into a sound wave audible to a human being, or converting an electric signal into a sound wave inaudible to a human being to measure a distance. In some embodiments, audio circuitry 407 may also include a headphone jack.
The positioning component 408 is used to locate the current geographic position of the terminal 400 for navigation or LBS (Location Based Service). The Positioning component 408 may be a Positioning component based on the GPS (Global Positioning System) of the united states, the beidou System of china, the graves System of russia, or the galileo System of the european union.
The power supply 409 is used to supply power to the various components in the terminal 400. The power source 409 may be alternating current, direct current, disposable or rechargeable. When power source 409 comprises a rechargeable battery, the rechargeable battery may support wired or wireless charging. The rechargeable battery may also be used to support fast charge technology.
That is, not only is an embodiment of the present invention provide a terminal including a processor and a memory for storing processor-executable instructions, where the processor is configured to execute the method in the embodiment shown in fig. 1 or fig. 2, but also an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored in the storage medium, and the computer program, when executed by the processor, can implement the method for determining the oil storage capacity in the embodiment shown in fig. 1 or fig. 2.
Those skilled in the art will appreciate that the configuration shown in fig. 4 is not intended to be limiting of terminal 400 and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components may be used.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A method of determining a reservoir gas reserve, the method comprising:
acquiring the gas volume multiple and the ground crude oil density of a target oil reservoir;
acquiring oil production, water production and dissolved gas production of a target production cycle of a target natural gas flooding project, wherein the target natural gas flooding project is a natural gas flooding project implemented in the target oil reservoir;
determining the oil deposit gas storage capacity of the target production period according to the gas volume multiple, the ground crude oil density, and the oil production, the water production and the dissolved gas production of the target production period;
determining the oil deposit gas storage capacity of the target production period according to the gas volume multiple, the ground crude oil density and the oil production, water production and dissolved gas production of the target production period, wherein the determining comprises the following steps:
determining the oil deposit gas storage capacity of the target production period according to the gas volume multiple, the ground crude oil density, and the oil production, the water production and the dissolved gas production of the target production period by the following formula:
said QsThe reserve gas volume for the target production cycle, said QoFor the oil production of the target production cycle, QgdThe amount of dissolved gas produced for the target production cycle, said QwThe water production amount of the target production cycle, the poAs the density of the crude oil on the ground, thegIs the gas volume multiple;
the method for acquiring the water yield of the target production cycle of the target natural gas flooding project comprises the following steps: acquiring the average water content of the oil reservoir of the target production period of the target natural gas flooding project; determining the average oil content of the oil reservoir of the target production period of the target natural gas flooding project according to the average oil reservoir water content of the target production period of the target natural gas flooding project; determining a ratio of oil production to average oil cut for the target production cycle for the target natural gas flooding project; and determining the product of the ratio and the average water content of the target production period of the target natural gas flooding project as the water yield of the target production period of the target natural gas flooding project.
2. The method of claim 1, wherein the obtaining the amount of dissolved gas produced for the target production cycle of the target natural gas drive project comprises:
acquiring the original gas-oil ratio of the target oil reservoir;
and determining the product of the oil production of the target production period of the target natural gas flooding project and the original gas-oil ratio as the dissolved gas production of the target production period of the target natural gas flooding project.
3. The method of claim 1 or 2, wherein after determining the reservoir gas capacity of the target production cycle based on the gas volume multiple and the surface crude oil density, and the oil production, water production, and dissolved gas production of the target production cycle, further comprising:
determining reservoir gas reserves for a plurality of production cycles of the target natural gas flooding project;
and accumulating the oil deposit gas storage quantities of the plurality of production periods to obtain the accumulated oil deposit gas storage quantity of the target natural gas drive project.
4. The method of claim 3, wherein after accumulating the reservoir gas reserves of the plurality of production cycles to obtain the accumulated reservoir gas reserve of the target natural gas drive project, further comprising:
acquiring the gas injection amount of each production period in the plurality of production periods;
accumulating the gas injection quantities of the plurality of production periods to obtain the accumulated gas injection quantity of the target natural gas flooding project;
and determining the ratio of the accumulated oil reservoir gas storage amount of the target natural gas flooding project to the accumulated gas injection amount of the target natural gas flooding project as the oil reservoir gas storage rate of the target natural gas flooding project.
5. An apparatus for determining a reservoir gas reserve, the apparatus comprising:
the first acquisition module is used for acquiring the gas volume multiple and the ground crude oil density of a target oil reservoir;
the second acquisition module is used for acquiring the oil production, the water production and the dissolved gas production of a target production cycle of a target natural gas flooding project, wherein the target natural gas flooding project is a natural gas flooding project implemented in the target oil reservoir;
the determining module is used for determining the oil deposit gas storage capacity of the target production period according to the gas volume multiple, the ground crude oil density, and the oil production, the water production and the dissolved gas production of the target production period;
wherein the determining module is specifically configured to:
determining the oil deposit gas storage capacity of the target production period according to the gas volume multiple, the ground crude oil density, and the oil production, the water production and the dissolved gas production of the target production period by the following formula:
wherein, Q issThe reserve gas volume for the target production cycle, said QoFor the oil production of the target production cycle, QgdThe amount of dissolved gas produced for the target production cycle, said QwThe water production amount of the target production cycle, the poAs the density of the crude oil on the ground, thegIs the gas volume multiple;
the method for acquiring the water yield of the target production cycle of the target natural gas flooding project comprises the following steps: acquiring the average water content of the oil reservoir of the target production period of the target natural gas flooding project; determining the average oil content of the oil reservoir of the target production period of the target natural gas flooding project according to the average oil reservoir water content of the target production period of the target natural gas flooding project; determining a ratio of oil production to average oil cut for the target production cycle for the target natural gas flooding project; and determining the product of the ratio and the average water content of the target production period of the target natural gas flooding project as the water yield of the target production period of the target natural gas flooding project.
6. An apparatus for determining a reservoir gas reserve, the apparatus comprising:
a processor and a memory for storing processor-executable instructions;
wherein the processor is configured to perform the method of any one of claims 1-4.
7. A computer-readable storage medium, characterized in that the storage medium has stored therein a computer program which, when being executed by a processor, carries out the method of any one of claims 1-4.
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| CN104975827B (en) * | 2014-04-03 | 2018-01-19 | 中国石油化工股份有限公司 | Predict the material balance method of carbon dioxide flooding oil reservoir index |
| US9984180B2 (en) * | 2015-05-05 | 2018-05-29 | King Fahd University Of Petroleum And Minerals | Inflow performance relationship for multilateral wells |
| CN106096081B (en) * | 2016-05-30 | 2019-08-06 | 恒泰艾普（北京）能源科技研究院有限公司 | The estimation method of reserve of fracture hole type bottom water reservoir |
| FR3054594B1 (en) * | 2016-07-29 | 2020-07-17 | IFP Energies Nouvelles | PROCESS FOR THE EXPLOITATION OF A HYDROCARBON DEPOSIT BY INJECTION OF A GAS IN THE FORM OF FOAM |
| CN106368673A (en) * | 2016-10-13 | 2017-02-01 | 中国石油化工股份有限公司 | Measuring method for water content and crude output of carbon dioxide flooding high water content oil reservoir producing well |
| CN108756868B (en) * | 2018-05-14 | 2022-01-11 | 中海石油(中国)有限公司 | Evaluation method for recoverable reserves in middle and later periods of gas injection development oil reservoir development |
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2018
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