CN108872294B - Method and device for determining ignition parameters of crude oil - Google Patents
Method and device for determining ignition parameters of crude oil Download PDFInfo
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Abstract
The application provides a method and a device for determining crude oil ignition parameters, wherein the method comprises the following steps of distilling crude oil according to temperature to obtain crude oil fractions in different temperature intervals after distillation; acquiring data of crude oil fraction content in different temperature intervals; and obtaining crude oil ignition parameters according to a first preset rule based on the crude oil fraction content data in different temperature intervals. By using the method and the device for determining the crude oil ignition parameter, the fraction contents of different temperature intervals can be determined by using a simple distillation range test, and the crude oil ignition parameter is calculated by using a formula with higher accuracy. Compared with the ignition parameters of the crude oil determined by the conventional spontaneous combustion test, the ignition parameters of the crude oil are higher in safety performance, short in time and low in cost, and under the normal condition, an oil field has a set of ready-made database for the fraction content of the crude oil, and the ignition parameters of the crude oil can be obtained without performing a distillation range test by substituting the data in the database into a formula.
Description
Technical Field
The application belongs to the technical field of oil exploitation, and particularly relates to a method and a device for determining an ignition parameter of crude oil.
Background
The key link of the fire flooding oil extraction process is ignition of an oil layer, and because the components of crude oil are very complex, some active components can react with oxygen more strongly at a lower temperature, and absorb oxygen molecules to generate substances such as alcohol, acid, ketone, aldehyde and the like at a lower temperature to form coke substances. The oxidation heat generation increases the temperature, which increases the oxidation more vigorously and generates more heat, which accelerates the oxidation reaction and may promote a rapid increase in temperature. Before the temperature is increased to reach the threshold temperature, the oxidation belongs to low-temperature oxidation, coking is generated in the oil reservoir, and after the temperature reaches the threshold temperature, the coking materials are combusted to finish the ignition process.
But the ignition success rate of the fireflood is greatly influenced because the ignition parameters of the crude oil are uncertain in the ignition process. Therefore, before the oil reservoir is ignited, it is necessary to determine the ignition parameters of the crude oil so that the oil reservoir can be successfully ignited for the fire flooding of the crude oil.
At present, the conventional method is to obtain ignition parameters of crude oil by using an auto-ignition combustion test, but the auto-ignition combustion test is usually carried out at high temperature and high pressure, and has high risk factor, long time and high cost, so a new method for obtaining the ignition parameters of crude oil is needed.
Disclosure of Invention
In order to overcome the above-mentioned drawbacks of the prior art, the present invention provides a method and an apparatus for determining crude oil ignition parameters, which can simply determine crude oil ignition parameters by using a formula.
The specific technical scheme of the invention is as follows:
the invention provides a method for determining crude oil ignition parameters, which comprises the following steps:
distilling crude oil according to the temperature to obtain crude oil fractions in different temperature intervals after distillation;
acquiring data of crude oil fraction content in different temperature intervals;
and obtaining crude oil ignition parameters according to a first preset rule based on the crude oil fraction content data in different temperature intervals.
In one embodiment, distilling crude oil according to temperature comprises:
according to the temperature of less than 250 ℃;
250℃-300℃；
300-350 ℃; and
and the crude oil is distilled in four temperature intervals at the temperature of more than 350 ℃.
In one embodiment, the first predetermined rule is that the crude oil ignition parameter is calculated according to the following formula:
wherein t is a crude oil ignition parameter; sigma is a crude oil ignition empirical value; a. theiAnd (4) taking positive integers from 1 to n as the data of the crude oil fraction content in the ith temperature interval.
In one embodiment, the crude oil ignition empirical values are obtained according to the following method:
picking up a plurality of groups of crude oil samples;
respectively burning each group of crude oil samples to obtain crude oil ignition parameters of each group of crude oil samples in different temperature intervals after burning;
and calculating the average value of the crude oil ignition parameters of the crude oil samples in the same temperature interval, wherein the average value is the crude oil ignition empirical value.
In one embodiment, the crude oil ignition parameters include an ignition delay time of the crude oil and/or an ignition temperature of the crude oil.
In addition, the invention also provides a device for determining the ignition parameters of crude oil, which comprises:
the distillation module is configured to distill crude oil according to temperature to obtain crude oil fractions with different temperature intervals after distillation;
the acquisition module is configured to acquire data of the crude oil fraction content in different temperature intervals;
and the ignition module is configured to obtain the ignition parameters of the crude oil according to a first preset rule based on the data of the crude oil fraction content of different temperature intervals.
In one embodiment, the distillation module configured to distill crude oil by temperature comprises:
according to the temperature of less than 250 ℃;
250℃-300℃；
300-350 ℃; and
and the crude oil is distilled in four temperature intervals at the temperature of more than 350 ℃.
In one embodiment, the ignition module is specifically configured to calculate the crude oil ignition parameter according to the following formula:
wherein t is a crude oil ignition parameter; sigma is a crude oil ignition empirical value; a. theiAnd (4) taking positive integers from 1 to n as the data of the crude oil fraction content in the ith temperature interval.
In one embodiment, the crude oil ignition empirical values are specifically configured to include:
a pick-up unit configured to pick up a plurality of sets of crude oil samples;
the combustion unit is configured to respectively combust each group of crude oil samples to obtain crude oil ignition parameters of each group of crude oil samples in different temperature intervals after combustion;
and the calculating unit is configured to calculate an average value of the crude oil ignition parameters of the same temperature interval of each group of crude oil samples, wherein the average value is the crude oil ignition empirical value.
In one embodiment, the crude oil ignition parameters include an ignition delay time of the crude oil and/or an ignition temperature of the crude oil.
An apparatus for determining crude oil ignition parameters comprising a memory and a processor, the memory having stored therein a computer program which, when executed by the processor, carries out the steps of a method of determining crude oil ignition parameters described below.
Borrow by above technical scheme, the beneficial effect of this application lies in: by using the method and the device for determining the crude oil ignition parameters, the fraction content of different temperature intervals can be determined by using a simple distillation range test, and the crude oil ignition parameters (crude oil ignition delay time and crude oil ignition temperature) can be calculated by using a formula with higher accuracy. Compared with the ignition parameters of the crude oil determined by the conventional spontaneous combustion test, the ignition parameters of the crude oil are higher in safety performance, short in time and low in cost, and under the normal condition, an oil field has a set of ready-made database for the fraction content of the crude oil, and the ignition parameters of the crude oil can be obtained without performing a distillation range test by substituting the data in the database into a formula.
Specific embodiments of the present application are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the application may be employed. It should be understood that the embodiments of the present application are not so limited in scope. The embodiments of the application include many variations, modifications and equivalents within the spirit and scope of the appended claims.
Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.
It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for assisting the understanding of the present application, and are not particularly limited to the shapes, the proportional sizes, and the like of the respective members in the present application. Those skilled in the art, having the benefit of the teachings of this application, may select various possible shapes and proportional sizes to implement the present application, depending on the particular situation. In the drawings:
FIG. 1 is a flow chart of a method of determining crude oil ignition parameters according to an embodiment of the present application;
FIG. 2 is a block diagram of an apparatus for determining crude oil ignition parameters according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, the present application provides a method of determining crude oil ignition parameters, the method comprising the steps of:
s1: distilling crude oil according to the temperature to obtain crude oil fractions in different temperature intervals after distillation;
s2: acquiring data of crude oil fraction content in different temperature intervals;
s3: and obtaining crude oil ignition parameters according to a first preset rule based on the crude oil fraction content data in different temperature intervals.
In the above embodiment, to determine the crude oil ignition parameters, the crude oil is first distilled according to temperature using a distillation range test. It should be noted that the crude oil ignition parameter may be the ignition delay time of the crude oil, or may be the ignition temperature of the crude oil.
Specifically, crude oil can be cut by using a distillation range test, the crude oil is divided into four temperature sections which are less than 250 ℃, 250-300 ℃, 300-350 ℃ and more than 350 ℃, then the data of the crude oil fraction content of the four temperature sections are obtained, and finally the crude oil ignition parameter is calculated according to a formula based on the data of the crude oil fraction content of the four temperature sections. Wherein the formula for determining the crude oil ignition parameters is:
wherein t is a crude oil ignition parameter; sigma is a crude oil ignition empirical value; a. theiThe data of the crude oil fraction content in the ith temperature interval are shown, wherein i is a positive integer from 1 to n.
Further, crude oil ignition empirical values may be determined as follows:
first, a plurality of groups of crude oil samples can be picked up, and in order to obtain the accuracy of the crude oil ignition empirical value, the crude oil samples can be picked up as many as possible. But by way of example only 3 sets of crude oil samples were selected in the examples described below.
Then, respectively burning each group of crude oil samples by utilizing an auto-ignition point test to obtain crude oil ignition parameters of each group of crude oil samples in different temperature ranges (less than 250 ℃, 250-300 ℃, 300-350 ℃ and more than 350 ℃) after burning;
and finally, calculating the average value of the crude oil ignition parameters of each group of crude oil samples in the same temperature interval, wherein the average value is the crude oil ignition empirical value.
A specific example is also provided to illustrate the method for determining the ignition parameters of the crude oil. It should be noted, however, that this embodiment is only for better illustration of the present invention and should not be construed as a limitation of the present invention.
In this example, the method comprises:
step 1, selecting 3 groups of crude oil samples, and respectively performing auto-ignition combustion tests on the 3 groups of crude oil samples to obtain crude oil ignition parameters of each group of crude oil samples in different temperature intervals after combustion, wherein the crude oil ignition parameters are shown in table 1:
TABLE 1
And 2, calculating the average value of the crude oil ignition parameters of the 3 groups of crude oil samples in the same temperature interval. Since the crude oil ignition parameters include the ignition delay time and the ignition temperature, the ignition delay time and the ignition temperature are respectively averaged when the crude oil ignition parameters are averaged as described below.
Wherein the average value of the ignition delay time is obtained as follows:
averaging the ignition delay times at a temperature range less than 250 ℃ (<250 ℃) (13.53+13.30)/2 ═ 13.42;
calculating the average value of ignition delay time as (13.63+13.83+ 12.93)/3-13.46 in the temperature range of 250-300 ℃;
calculating the average value of ignition delay time as (14.73+15.20+13.50)/3 as 14.48 in the temperature range of 300-350 ℃;
calculating the average value of ignition delay time as (17.03+16.83+17.17)/3 as 17.01 in the temperature range of more than 350 ℃ (350 ℃);
the average value of the ignition temperature is obtained as follows:
calculating the average value of the ignition temperature to be (215.40+ 215.20)/2-215.30 in a temperature range less than 250 ℃ (<250 ℃);
the average value of the ignition temperature is (220.10+221.50+ 193.60)/3-211.73 in the temperature range of 250-300 ℃;
the average value of the ignition temperature is (238.80+249.80+ 206.60)/3-231.73 in the temperature range of 300-350 ℃;
the average value of the ignition temperature is (274.40+267.30+ 280.20)/3-273.97 in a temperature range larger than 350 ℃ (350 ℃);
the crude oil ignition empirical values (the empirical value of the ignition delay time and the empirical value of the ignition temperature) obtained here are fixed values determined by test samples, and can be directly used when the crude oil ignition parameters are obtained.
And 3, distilling the crude oil according to temperature intervals (less than 250 ℃, 250-300 ℃, 300-350 ℃ and more than 350 ℃) by using a distillation range test, and then obtaining the data of the content of the crude oil fractions.
For example, crude oil has a fractional fraction content of 10.98% at a temperature of less than 250 ℃ (<250 ℃);
the content of the distillate in the temperature range of 250-300 ℃ is 5.84%;
the fraction content is 20.72% in the temperature range of 300-350 ℃;
the fractional content was 62.49% during the temperature interval at greater than 350 ℃ (> 350 ℃).
Step 4, substituting the data of the crude oil ignition empirical value in the step 2 and the crude oil fraction content in the step 3 into a formula
wherein t is a crude oil ignition parameter; sigma is a crude oil ignition empirical value; a. theiAnd (4) taking positive integers from 1 to n as the data of the crude oil fraction content in the ith temperature interval. Because of the division into four temperature intervals (less than 250 ℃, 250 ℃ -300 ℃, 300 ℃ -350 ℃, and more than 350 ℃), n is 4 here; i can take the values 1,2,3, 4.
The crude oil ignition delay time can be found to be: t is td＝13.42×10.98％+13.46×5.84％+14.48×20.72％+17.01×62.46％＝15.88min
The crude oil ignition temperature can also be obtained as: t is ti＝215.3×10.98％+211.73×5.84％+231.73×20.72％+273.97×62.46％＝255.14℃
To verify the accuracy of the crude oil ignition parameter determination method, the above results can be compared with the actual crude oil ignition delay time td16.23min and ignition temperature tiComparing at 259.40 ℃, and respectively obtaining the accuracy of the ignition delay time of the crude oil as follows: 97.843 percent; the accuracy of the crude oil ignition temperature is as follows: 98.358 percent.
Therefore, the method for determining the crude oil ignition parameters can determine the fraction content of different temperature intervals by using a simple distillation range test, and the crude oil ignition parameters (crude oil ignition delay time and crude oil ignition temperature) calculated by using a formula have higher accuracy and can be implemented on a crude oil fireflood ignition site.
Based on the same inventive concept, the embodiment of the present invention also provides a device for determining the ignition parameters of crude oil, as described in the following embodiments. Because the principle of solving the problems of the device for determining the ignition parameters of the crude oil is similar to that of the method for determining the ignition parameters of the crude oil, the implementation of the device for determining the ignition parameters of the crude oil can refer to the implementation of the method for determining the ignition parameters of the crude oil, and repeated details are omitted. As used hereinafter, the term "unit" or "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.
The present invention also provides, as shown in fig. 2, an apparatus for determining crude oil ignition parameters, the apparatus comprising:
the distillation module 101 is configured to distill crude oil according to temperature to obtain crude oil fractions of different temperature intervals after distillation;
an obtaining module 102 configured to obtain data of crude oil fraction contents of different temperature intervals;
an ignition module 103 configured to obtain crude oil ignition parameters according to a first predetermined rule based on data of crude oil fraction contents of different temperature intervals.
In one embodiment, the distillation module 101 is configured to distill crude oil with temperature comprising:
according to the temperature of less than 250 ℃;
250℃-300℃；
300-350 ℃; and
and the crude oil is distilled in four temperature intervals at the temperature of more than 350 ℃.
In one embodiment, the ignition module 103 is specifically configured to calculate the crude oil ignition parameter according to the following formula:
wherein t is a crude oil ignition parameter; sigma is a crude oil ignition empirical value; a. theiAnd (4) taking positive integers from 1 to n as the data of the crude oil fraction content in the ith temperature interval.
In one embodiment, the crude oil ignition empirical values are specifically configured to include:
a pick-up unit configured to pick up a plurality of sets of crude oil samples;
the combustion unit is configured to respectively combust each group of crude oil samples to obtain crude oil ignition parameters of each group of crude oil samples in different temperature intervals after combustion;
and the calculating unit is configured to calculate an average value of the crude oil ignition parameters of the same temperature interval of each group of crude oil samples, wherein the average value is the crude oil ignition empirical value.
In one embodiment, the crude oil ignition parameters include an ignition delay time of the crude oil and/or an ignition temperature of the crude oil.
In addition, the present invention also provides an apparatus for determining crude oil ignition parameters, comprising a memory and a processor, the memory having stored therein a computer program which, when executed by the processor, carries out the steps of the method for determining crude oil ignition parameters described below.
In this embodiment, the memory may include a physical device for storing information, and typically, the information is digitized and then stored in a medium using an electrical, magnetic, or optical method. The memory according to this embodiment may further include: devices that store information using electrical energy, such as RAM, ROM, etc.; devices that store information using magnetic energy, such as hard disks, floppy disks, tapes, core memories, bubble memories, usb disks; devices for storing information optically, such as CDs or DVDs. Of course, there are other ways of memory, such as quantum memory, graphene memory, and so forth.
In this embodiment, the processor may be implemented in any suitable manner. For example, the processor may take the form of, for example, a microprocessor or processor and a computer-readable medium that stores computer-readable program code (e.g., software or firmware) executable by the (micro) processor, logic gates, switches, an Application Specific Integrated Circuit (ASIC), a programmable logic controller, an embedded microcontroller, and so forth.
The specific functions of the server, the processor and the memory thereof implemented by the embodiments of the present specification can be explained in comparison with the foregoing embodiments of the present specification.
In another embodiment, a software for implementing the technical solutions described in the above embodiments and preferred embodiments is also provided.
In another embodiment, a storage medium is provided, in which the software is stored, and the storage medium includes but is not limited to: optical disks, floppy disks, hard disks, erasable memory, etc.
As can be seen from the above description, the embodiments of the present invention achieve the following technical effects: compared with the ignition parameters of crude oil determined by a conventional spontaneous combustion test, the ignition parameters of crude oil are higher in safety, short in time and low in cost, and under the normal condition, an oil field has a set of ready-made database for the fraction content of the crude oil, and the ignition parameters of the crude oil can be obtained without performing a distillation range test by substituting data in the database into a formula.
It will be apparent to those skilled in the art that the modules or steps of the embodiments of the invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, embodiments of the invention are not limited to any specific combination of hardware and software.
All articles and references disclosed herein, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional.
A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.
It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of subject matter that is disclosed herein is not intended to forego the subject matter and should not be construed as an admission that the applicant does not consider such subject matter to be part of the disclosed subject matter.
Claims (9)
1. A method of determining crude oil ignition parameters, comprising:
distilling crude oil according to the temperature to obtain crude oil fractions in different temperature intervals after distillation;
acquiring data of crude oil fraction content in different temperature intervals;
obtaining crude oil ignition parameters according to a first preset rule based on the crude oil fraction content data in different temperature intervals;
the first predetermined rule is that the crude oil ignition parameter is calculated according to the following formula:
wherein t is a crude oil ignition parameter; sigma is a crude oil ignition empirical value; a. theiAnd (4) taking positive integers from 1 to n as the data of the crude oil fraction content in the ith temperature interval.
2. The method of determining crude oil ignition parameters of claim 1, wherein distilling the crude oil as a function of temperature comprises:
according to the temperature of less than 250 ℃;
250℃-300℃；
300-350 ℃; and
and the crude oil is distilled in four temperature intervals at the temperature of more than 350 ℃.
3. The method of determining crude oil ignition parameters of claim 1, wherein the crude oil ignition empirical values are obtained as follows:
picking up a plurality of groups of crude oil samples;
respectively burning each group of crude oil samples to obtain crude oil ignition parameters of each group of crude oil samples in different temperature intervals after burning;
and calculating the average value of the crude oil ignition parameters of the crude oil samples in the same temperature interval, wherein the average value is the crude oil ignition empirical value.
4. The method of determining crude oil ignition parameters of any one of claims 1 to 3, wherein the crude oil ignition parameters include ignition delay time of the crude oil and/or ignition temperature of the crude oil.
5. An apparatus for determining crude oil ignition parameters, comprising:
the distillation module is configured to distill crude oil according to temperature to obtain crude oil fractions with different temperature intervals after distillation;
the acquisition module is configured to acquire data of the crude oil fraction content in different temperature intervals;
the ignition module is configured to obtain crude oil ignition parameters according to a first preset rule based on the crude oil fraction content data of different temperature intervals;
the ignition module is specifically configured to calculate the crude oil ignition parameter according to the following formula:
wherein t is a crude oil ignition parameter; sigma is a crude oil ignition empirical value; a. theiAnd (4) taking positive integers from 1 to n as the data of the crude oil fraction content in the ith temperature interval.
6. The apparatus of claim 5, wherein the distillation module configured to distill crude oil as a function of temperature comprises:
according to the temperature of less than 250 ℃;
250℃-300℃；
300-350 ℃; and
and the crude oil is distilled in four temperature intervals at the temperature of more than 350 ℃.
7. The apparatus for determining crude oil ignition parameters as claimed in claim 6, wherein the ignition module comprises in particular:
a pick-up unit configured to pick up a plurality of sets of crude oil samples;
the combustion unit is configured to respectively combust each group of crude oil samples to obtain crude oil ignition parameters of each group of crude oil samples in different temperature intervals after combustion;
and the calculating unit is configured to calculate an average value of the crude oil ignition parameters of the same temperature interval of each group of crude oil samples, wherein the average value is the crude oil ignition empirical value.
8. The apparatus for determining crude oil ignition parameters of any one of claims 5 to 7 wherein the crude oil ignition parameters include ignition delay time of the crude oil and/or ignition temperature of the crude oil.
9. An apparatus for determining crude oil ignition parameters, comprising a memory and a processor, the memory having stored therein a computer program which, when executed by the processor, performs the steps of: the method of determining crude oil ignition parameters as claimed in any one of claims 1 to 4.
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