CN113704950B - Method and device for standardized evaluation of reservoir gas content through gas logging of all-hydrocarbon - Google Patents
Method and device for standardized evaluation of reservoir gas content through gas logging of all-hydrocarbon Download PDFInfo
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Abstract
The invention relates to a method and a device for standardized evaluation of reservoir gas content in a gas logging full hydrocarbon, belonging to the technical field of natural gas exploration and development. The method comprises the following steps: 1) acquiring actual measurement while-drilling gas measurement total hydrocarbon values of all depths of a target area, and layering the target area according to the actual measurement while-drilling gas measurement total hydrocarbon values; 2) determining the influence relationship of the drilling time standard value, the drilling fluid discharge standard value and the total desorption analysis value of each layer on the gas measurement total hydrocarbon value, and respectively establishing a gas measurement total hydrocarbon influence model of the drilling time, a gas measurement total hydrocarbon influence model of the drilling fluid discharge and a gas measurement total hydrocarbon influence model of the total desorption analysis value of each layer; 3) and correcting the actually measured gas-logging-while-drilling all hydrocarbon values of each layer according to the established model. The method can select the gas-measuring total hydrocarbon influence model of the corresponding layer during drilling, the gas-measuring total hydrocarbon influence model of the well drilling liquid discharge quantity and the gas-measuring total hydrocarbon influence model of the total desorption analysis value to carry out targeted correction, so that the correction result is more accurate, and the evaluation result is more accurate.
Description
Technical Field
The invention relates to a method and a device for standardized evaluation of reservoir gas content in a gas logging full hydrocarbon, belonging to the technical field of natural gas exploration and development.
Background
With the continuous promotion of development degree, the reserve utilization degree is higher and higher, old well dredging and submerging become an important means for gas reservoir stable yield, gas logging of whole hydrocarbon during old well dredging and submerging is an important reference material which is one of important parameters for judging the physical properties and gas content of a reservoir, but in the actual drilling process, actually measured gas logging while drilling of whole hydrocarbon data is often influenced by multiple parameters, so that a certain deviation exists between the actually measured gas logging while drilling of whole hydrocarbon value and the actually measured gas logging of whole hydrocarbon, in order to realize accurate evaluation of the gas logging while drilling of the reservoir based on the gas logging of whole hydrocarbon data, the deviation of the response of the gas logging while drilling of whole hydrocarbon data to the physical properties and the fluid properties of the reservoir is avoided, the requirement of old well dredging and submerging is met, and the actually measured gas logging while drilling of whole hydrocarbon data needs to be corrected.
However, the existing gas logging total hydrocarbon correction method considers a few factors, for example, chinese patent application with application publication No. CN108194077A discloses a gas logging total hydrocarbon correction method, which realizes gas logging total hydrocarbon correction by considering three engineering parameters of bit size, drilling fluid displacement, and drilling time, and because the method only considers three engineering parameters of bit size, drilling fluid displacement, and drilling time, neglects the influence of total desorption analysis values on gas logging total hydrocarbons, and does not distinguish the influence of three engineering parameters of bit size, drilling fluid displacement, and drilling time on gas logging total hydrocarbons at different levels, the correction model adopted for the whole target area is the same, and the layered consideration is not performed when the correction model is established, so that the accurate correction of the gas logging total hydrocarbon value cannot be realized, and the accurate evaluation of reservoir and fluid properties is not facilitated.
Disclosure of Invention
The invention aims to provide a method and a device for evaluating reservoir gas content in a gas logging full hydrocarbon standardization manner, and the method and the device are used for solving the problem that the existing reservoir gas content evaluation method cannot realize accurate evaluation on the reservoir gas content.
In order to achieve the purpose, the invention provides a method for evaluating the gas content of a reservoir by gas logging whole hydrocarbon standardization, which comprises the following steps:
1) acquiring actual measurement while-drilling gas measurement total hydrocarbon values of all depths of a target area, and layering the target area according to the actual measurement while-drilling gas measurement total hydrocarbon values;
2) determining the influence relationship of the drilling time standard value, the drilling fluid discharge standard value and the total desorption analysis value of each layer on the gas measurement total hydrocarbon value, establishing a drilling time gas measurement total hydrocarbon influence model of each layer according to the drilling time standard value of each layer, establishing a drilling fluid discharge amount gas measurement total hydrocarbon influence model of each layer according to the drilling fluid discharge standard value of each layer, and establishing a gas measurement total hydrocarbon influence model of the total desorption analysis value of each layer according to the influence relationship of the total desorption analysis value of each layer on the gas measurement total hydrocarbon value;
3) correcting the actual measurement while drilling gas measurement all-hydrocarbon value of each layer according to the established gas measurement all-hydrocarbon influence model during drilling of each layer, the gas measurement all-hydrocarbon influence model of the drilling liquid discharge amount and the gas measurement all-hydrocarbon influence model of the total desorption analysis value;
4) and evaluating the gas content of the reservoir by using the corrected gas measurement total hydrocarbon value.
In addition, the invention also provides a device for evaluating the gas content of the reservoir by gas logging of the whole hydrocarbon standardization, which comprises a processor and a memory, wherein the processor executes a computer program stored by the memory so as to realize the method for evaluating the gas content of the reservoir by gas logging of the whole hydrocarbon standardization.
The beneficial effects are that: firstly, layering a target area according to the size of an actually measured gas-while-drilling total hydrocarbon value, then determining the influence relationship of a drilling time standard value, a drilling fluid discharge standard value and a total desorption analysis value corresponding to each layer on the gas-measured total hydrocarbon value, and establishing a gas-measured total hydrocarbon influence model of the drilling time, a gas-measured total hydrocarbon influence model of the drilling fluid discharge and a gas-measured total hydrocarbon influence model of the total desorption analysis value corresponding to each layer; on the basis, when the actual measurement while drilling gas measurement total hydrocarbon value of a certain layer is verified, a gas measurement total hydrocarbon influence model of the corresponding layer during drilling, a gas measurement total hydrocarbon influence model of the drilling liquid discharge amount and a gas measurement total hydrocarbon influence model of the total desorption analysis value can be selected for targeted correction, so that the correction result is more accurate; in addition, the single-factor gas logging all-hydrocarbon correction model corresponding to the drilling time, the drilling fluid discharge capacity and the all-stripping analysis value is established, the influence of three main factors of the drilling time, the drilling fluid discharge capacity and the all-stripping analysis value on the actually measured gas logging while drilling all-hydrocarbon data is comprehensively considered, the considered factors are comprehensive, the accuracy of the actually measured gas logging while drilling all-hydrocarbon value correction effect is improved, and the accuracy of reservoir gas content evaluation is further improved.
Further, in the above method and apparatus, the method for determining the standard value of each layer during drilling comprises: judging the frequency of each drilling time in each layer, and determining the drilling time standard value of each layer according to the frequency of each drilling time;
the method for determining the standard value of the drilling fluid displacement of each layer comprises the following steps: and judging the frequency of the drilling fluid discharge capacity in each layer, and determining the drilling fluid discharge capacity standard value of each layer according to the frequency of the drilling fluid discharge capacity.
Furthermore, in the method and the device for determining the standard drilling time value of each layer, the average value of the drilling time with high frequency in each layer is used as the standard drilling time value of each layer;
in the method for determining the standard value of the drilling fluid discharge capacity of each layer, the average value of the drilling fluid discharge capacities with high occurrence frequency in each layer is used as the standard value of the drilling fluid discharge capacity of each layer.
Further, in the above method and apparatus, the correction formula adopted in step 3) is:
T g ′＝K tg ′×K Qg ′×T Tg ′
wherein, T g ' gas measurement Total Hydrocarbon value, K, corrected by factors including drilling time, drilling fluid discharge and Total Deanalysis value tg ' is the proportional coefficient of the measured drilling time and the standard value of diamond, K, in the gas-measuring total hydrocarbon influence model of the corresponding layer during drilling Qg ' gas logging for well drainage of corresponding formationThe proportional coefficient of the actually measured drilling liquid discharge and the standard value of the drilling liquid discharge in the all-hydrocarbon influence model; t is Tg ' gas-measured all-hydrocarbon value corrected by using the influence relationship of the full-stripping analysis value on the gas-measured all-hydrocarbon value in a gas-measured all-hydrocarbon influence model of the full-stripping analysis value of the corresponding layer.
Further, in the method and the device, the gas logging total hydrocarbon influence model during drilling is established as follows:
wherein, T tg ' is the gas measured total hydrocarbon value, T, corrected on the basis of time on drilling g Measuring the total hydrocarbon data value for the actual measurement while drilling gas, t is the actual measurement drilling time, t b And the standard value of the drilling time is obtained.
Further, in the method and the device, the established gas logging total hydrocarbon influence model of the well drainage capacity is as follows:
wherein, T Qg ' gas measured Total Hydrocarbon value corrected according to well drainage, T g Measuring the total hydrocarbon data value for actual measurement while drilling gas, wherein Q is the measured drilling liquid discharge, Q b And the standard value of the drilling liquid discharge is obtained.
Further, in the method and the device, the influence relationship of the total desorption analysis value of each layer on the gas-measured total hydrocarbon value is obtained through fitting according to the gas-measured total hydrocarbon value and the total desorption analysis value of each layer.
Further, in the method and the device, the gas measurement total hydrocarbon influence model of the total desorption analysis value is established as follows:
T Tg ′＝a×T g +b
wherein, T g The method is characterized in that a is a coefficient and b is a constant for actually measuring the data value of the whole hydrocarbon while drilling gas measurement.
Further, in the above method and apparatus, in the step 1),
if the actual measurement while drilling gas measurement total hydrocarbon value is larger than 10%, dividing the target layer into gas layers;
if the actual measurement is 3% -10% of the total hydrocarbon value measured while drilling, dividing the target layer into a gas difference layer;
and if the actual measurement while drilling gas measurement total hydrocarbon value is less than 3%, dividing the target layer into dry layers.
Drawings
FIG. 1 is a flow chart of a method for standardized evaluation of reservoir gas content by gas logging of all-hydrocarbon according to an embodiment of the method for standardized evaluation of reservoir gas content by gas logging of all-hydrocarbon of the invention;
FIG. 2 is a schematic diagram of intersection of gas-logging total hydrocarbon and gas-water identification in an embodiment of the method for standardized evaluation of reservoir gas-bearing property by gas-logging total hydrocarbon;
FIG. 3 is a schematic diagram showing the correlation between drilling time and frequency in an embodiment of the method for standardized evaluation of reservoir gas content by gas logging of whole hydrocarbons;
FIG. 4 is a schematic diagram showing the correlation between drilling fluid discharge and frequency in an embodiment of the method for standardized evaluation of reservoir gas content by gas logging of whole hydrocarbons;
FIG. 5 is a schematic diagram showing the relationship between the total desorption analysis value and the gas measurement total hydrocarbon of an embodiment of the method for evaluating the gas content of the reservoir by gas measurement total hydrocarbon standardization;
fig. 6 is a schematic diagram of a gas logging all-hydrocarbon data correction device of an embodiment of the device for standardized evaluation of reservoir gas bearing capacity by gas logging all-hydrocarbon according to the invention.
Detailed Description
The following description will further describe embodiments of the present invention with reference to the accompanying drawings.
Method example for standardized evaluation of reservoir gas content by gas logging of all hydrocarbons:
the embodiment provides a method for evaluating reservoir gas content of a gas logging total hydrocarbon standard, which is used for solving the problems that when the existing reservoir gas content evaluation method is used for correcting a gas logging total hydrocarbon value, a correction model adopted by the whole target area is the same, layering consideration is not carried out when the correction model is established, and the accuracy of the reservoir gas content evaluation result is influenced; on the basis, when the actually measured gas-logging-while-drilling total hydrocarbon value of a certain layer is verified, a gas-logging total hydrocarbon influence model of the corresponding layer during drilling, a gas-logging total hydrocarbon influence model of the well drilling liquid discharge amount and a gas-logging total hydrocarbon influence model of the total desorption analysis value can be selected for targeted correction, and the purpose of improving the accuracy of the gas-logging total hydrocarbon correction result is achieved; the corrected gas logging total hydrocarbon value is used for evaluating the gas content of the reservoir, so that the accuracy of evaluating the gas content of the reservoir can be improved.
The specific process of the method for standardized evaluation of reservoir gas content by gas logging of all hydrocarbons in this embodiment is as follows, as shown in fig. 1:
1) and acquiring the actual measurement while-drilling gas measurement total hydrocarbon value of each depth of the target area, and layering the target area according to the actual measurement while-drilling gas measurement total hydrocarbon value.
Combining the gas test results of the same layer of the target area, establishing a corresponding relationship between the gas test results and the actual measurement while drilling gas measurement total hydrocarbon value, as shown in fig. 2, in this embodiment, the target area is divided into three layers, which are a gas layer, a gas difference layer and a dry layer, respectively, and the corresponding relationship between each layer and the actual measurement while drilling gas measurement total hydrocarbon value is established as follows: the actual measurement while drilling gas measurement total hydrocarbon value of the gas layer is more than 10%, the actual measurement while drilling gas measurement total hydrocarbon value of the gas difference layer is 3% -10%, and the actual measurement while drilling gas measurement total hydrocarbon value of the dry layer is less than 3%.
In this embodiment, the target area is divided into three layers, namely, an air layer, a differential air layer and a dry layer, and as other embodiments, the division result of the target area may be adjusted, for example, the number of layers and the range of the measured while-drilling total hydrocarbon value on which each layer is based may be adjusted according to actual conditions.
2) The main non-geological factors affecting the gas survey of all hydrocarbon values at different horizons of the target area are: the drilling time, the drilling fluid discharge capacity and the total desorption analysis value are considered, and a gas measurement total hydrocarbon influence model of the drilling time and the drilling fluid discharge capacity and a gas measurement total hydrocarbon influence model of the drilling liquid discharge capacity are established by adopting a proportional function; before establishing a gas measurement total hydrocarbon influence model of each layer during drilling and a gas measurement total hydrocarbon influence model of drilling liquid discharge, a drilling time standard value and a drilling liquid discharge standard value corresponding to each layer need to be determined.
In this embodiment, the method for determining the drilling standard value of each layer includes: judging the frequency of each drilling time in each layer, and determining the drilling time standard value of each layer according to the frequency of each drilling time; specifically, the average value of the drilling times at which the frequency of occurrence of each layer is large may be used as the drilling time standard value of each layer. The higher frequency is a relative quantity, which refers to a frequency value higher than other frequencies, and does not refer to a specific frequency range.
In this embodiment, the method for determining the standard value of the drilling fluid displacement of each layer includes: judging the frequency of the drilling fluid discharge capacity in each layer, and determining the standard value of the drilling fluid discharge capacity of each layer according to the frequency of the drilling fluid discharge capacity; specifically, the average value of the drilling fluid discharge amount with a high occurrence frequency in each layer may be used as the standard value of the drilling fluid discharge amount in each layer. The higher frequency is a relative quantity, which refers to a frequency value higher than other frequencies, and does not refer to a specific frequency range.
After the drilling time standard value and the drilling fluid discharge capacity standard value of each layer are determined, a gas measurement total hydrocarbon influence model of each layer during drilling can be established according to the drilling time standard value of each layer, and a gas measurement total hydrocarbon influence model of the drilling fluid discharge capacity of each layer is established according to the drilling fluid discharge capacity standard value of each layer.
In this example, the gas logging total hydrocarbon influence model during drilling is established as follows:
wherein, T tg ' is the gas-measured Total Hydrocarbon value, K, corrected on the basis of time on bit tg ' is the ratio coefficient of actual measured drilling time and standard diamond in the gas-measuring total hydrocarbon influence model during drilling time, T g Measuring the total hydrocarbon data value for actual measurement while drilling gas, and t is the measured drilling time and t b The standard value during drilling is the corresponding t b The values also differ.
The gas logging total hydrocarbon influence model of the well drainage volume established in the embodiment is as follows:
wherein, T Qg ' gas measured Total Hydrocarbon value corrected according to well drainage, K Qg ' is the proportionality coefficient of the measured drilling fluid discharge and the standard drilling fluid discharge in the gas logging total hydrocarbon influence model of the drilling fluid discharge, T g Measuring the data value of all hydrocarbons for actual measurement while drilling gas, Q is the measured drilling liquid discharge, Q b For standard value of well drainage, different layers correspond to Q b The values also differ.
According to the actual measurement while drilling gas measurement total hydrocarbon value and the total desorption analysis value of each layer, the influence relation of the total desorption analysis value of each layer on the gas measurement total hydrocarbon value can be obtained through fitting, and a gas measurement total hydrocarbon influence model of the total desorption analysis value of each layer is established according to the influence relation of the total desorption analysis value of each layer on the gas measurement total hydrocarbon value. For a certain reservoir, the measured gas-while-drilling total hydrocarbon value and the total desorption value are basically in a linear relation.
The gas measurement total hydrocarbon influence model of the total desorption analysis value established in the embodiment is as follows:
T Tg ′＝f(T g )＝a×T g +b
wherein, T Tg ' gas-measured Total Hydrocarbon value, T, corrected in accordance with the influence relationship of Total Deanalysis values on gas-measured Total Hydrocarbon values in gas-measured Total Hydrocarbon influence model for Total Deanalysis values g The method is characterized in that the method is used for actually measuring the all-hydrocarbon data value while drilling gas, wherein a is a coefficient, b is a constant, the layering is different, and the corresponding a value and the b value are different. The total desorption analysis value is the gas-measuring total hydrocarbon data value after the gas-measuring total hydrocarbon data value is corrected by utilizing the gas-measuring total hydrocarbon influence model of the total desorption analysis value.
3) And correcting the actual measurement while drilling gas measurement all-hydrocarbon value of each layer according to the established gas measurement all-hydrocarbon influence model during drilling of each layer, the gas measurement all-hydrocarbon influence model of the drilling liquid discharge amount and the gas measurement all-hydrocarbon influence model of the total desorption analysis value.
Three influence factors of drilling time, drilling fluid discharge and total desorption analysis value are integrated to form a gas measurement total hydrocarbon correction calculation formula comprising the parameters of drilling time, drilling fluid discharge and total desorption analysis value:
wherein, T g ' is the gas-logging total hydrocarbon value corrected by factors of drilling time, drilling fluid discharge and total desorption analysis value.
4) And evaluating the gas content of the reservoir by using the corrected gas measurement total hydrocarbon value.
The following description will take specific establishment of a gas-logging total hydrocarbon influence model during drilling, a gas-logging total hydrocarbon influence model of drilling drainage volume, and a gas-logging total hydrocarbon influence model of total desorption analysis value corresponding to a certain layer as an example:
as shown in figure 3, the sandstone drilling time with higher frequency of the too 2 gas reservoir is concentrated in a region of 2.5-8.5, so that the average value of 5.99min/m can be used as the standard value of the too 2 gas reservoir drilling time, namely t b And 5.99min/m, the gas logging total hydrocarbon influence model of the layer corresponding to the drilling time is specifically as follows:
as shown in FIG. 4, the higher frequency drilling fluid displacement for the too 2 reservoir is concentrated in the 0.75-1.25 region, thus averaging 1.12m 3 Permin can be used as the standard drilling fluid discharge capacity of the Tai 2 gas reservoir, namely Q b ＝1.12m 3 And/min, then the gas logging total hydrocarbon influence model of the layer corresponding to the drilling time is specifically as follows:
as shown in fig. 5, fitting the relationship between the total desorption analysis value of the gas reservoir 2 and the gas measured total hydrocarbon, where a is 1.411 and b is 0.5406, the gas measured total hydrocarbon influence model of the total desorption analysis value corresponding to the layer is specifically:
T Tg ′＝f(T g )＝1.411T g +0.5406。
when the measured while-drilling data of the layer is corrected, the measured while-drilling data of the layer is corrected
And T Tg ′＝1.411T g Substituting +0.5406 into the correction formula can obtain:
in order to verify the effectiveness of the method, relevant data of 31 wells in a certain area are used as an example for verification, relevant experimental data are shown in table 1, and it can be seen from the data in table 1 that 31 wells can be optimized by the method for evaluating the reservoir gas content in a standardized manner by using the gas logging total hydrocarbons, the average daily increase of natural gas per well is 0.7805 ten thousand square/day, the preferable conformance rate of a potential layer is up to 97%, and the accuracy and the reliability of the method for evaluating the reservoir gas content in a standardized manner by using the gas logging total hydrocarbons are fully verified.
TABLE 1
Gas logging all hydrocarbon standardized evaluation reservoir gas content device example:
the apparatus proposed in this embodiment, as shown in fig. 6, includes a processor and a memory, where a computer program operable on the processor is stored in the memory, and the processor implements the method of the above method embodiment when executing the computer program.
That is, the methods in the above method embodiments should be understood that the flow of the method for gas logging all hydrocarbon standardized assessments of reservoir gas bearing may be implemented by computer program instructions. These computer program instructions may be provided to a processor (e.g., a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus), such that the instructions, which execute via the processor, create means for implementing the functions specified in the method flow.
The processor referred to in this embodiment refers to a processing device such as a microprocessor MCU or a programmable logic device FPGA;
the memory referred to in this embodiment includes a physical device for storing information, and generally, the information is digitized and stored in a medium using an electric, magnetic, optical, or the like. For example: various memories for storing information by using an electric energy mode, such as a RAM, a ROM and the like; various memories for storing information by magnetic energy, such as hard disk, floppy disk, magnetic tape, magnetic core memory, bubble memory, and U disk; various types of memory, CD or DVD, that store information optically. Of course, there are other ways of memory, such as quantum memory, graphene memory, and so forth.
The apparatus comprising the memory, the processor and the computer program is realized by the processor executing corresponding program instructions in the computer, and the processor can be loaded with various operating systems, such as windows operating system, linux system, android, iOS system, and the like.
Claims (10)
1. A method for evaluating reservoir gas content by gas logging full hydrocarbon standardization is characterized by comprising the following steps:
1) acquiring actual measurement while-drilling gas measurement total hydrocarbon values of all depths of a target area, and layering the target area according to the actual measurement while-drilling gas measurement total hydrocarbon values;
2) determining the influence relationship of the drilling time standard value, the drilling fluid discharge standard value and the total desorption analysis value of each layer on the gas measurement total hydrocarbon value, establishing a drilling time gas measurement total hydrocarbon influence model of each layer according to the drilling time standard value of each layer, establishing a drilling fluid discharge amount gas measurement total hydrocarbon influence model of each layer according to the drilling fluid discharge standard value of each layer, and establishing a gas measurement total hydrocarbon influence model of the total desorption analysis value of each layer according to the influence relationship of the total desorption analysis value of each layer on the gas measurement total hydrocarbon value;
3) correcting the actual measurement while drilling gas measurement all-hydrocarbon value of each layer according to the established gas measurement all-hydrocarbon influence model during drilling of each layer, the gas measurement all-hydrocarbon influence model of the drilling liquid discharge amount and the gas measurement all-hydrocarbon influence model of the total desorption analysis value;
4) and evaluating the gas content of the reservoir by using the corrected gas measurement total hydrocarbon value.
2. The method for standardized evaluation of reservoir gas content by gas logging of all hydrocarbons according to claim 1,
the method for determining the standard value of the drilling time of each layer comprises the following steps: judging the frequency of each drilling time in each layer, and determining the drilling time standard value of each layer according to the frequency of each drilling time;
the method for determining the standard value of the drilling fluid displacement of each layer comprises the following steps: and judging the frequency of the drilling fluid discharge capacity in each layer, and determining the drilling fluid discharge capacity standard value of each layer according to the frequency of the drilling fluid discharge capacity.
3. The method for standardized evaluation of reservoir gas content by gas logging of all hydrocarbons according to claim 2,
in the method for determining the drilling time standard value of each layer, the average value of drilling time with high frequency in each layer is used as the drilling time standard value of each layer;
in the method for determining the standard value of the drilling fluid discharge capacity of each layer, the average value of the drilling fluid discharge capacities with high occurrence frequency in each layer is used as the standard value of the drilling fluid discharge capacity of each layer.
4. The method for evaluating the gas content of the reservoir through gas measurement and whole hydrocarbon standardization according to the claim 1, the claim 2 or the claim 3, characterized in that the correction formula adopted in the step 3) is as follows:
T′ g ＝K′ tg ×K′ Qg ×T′ Tg
wherein, T' g The gas logging total hydrocarbon value K is corrected by using factors of drilling time, drilling fluid discharge capacity and total desorption analysis value tg ' actual measurement of drilling time and drilling in gas measurement Total Hydrocarbon Effect model for drilling time of corresponding layerCoefficient of proportionality of standard value of stone, K Qg The proportionality coefficient of actually measured drilling liquid discharge and drilling liquid discharge standard value in a gas measurement total hydrocarbon influence model of the drilling liquid discharge of a corresponding layer is' obtained; t is Tg ' gas-measured total hydrocarbon value corrected by using the influence relationship of the total desorption analysis value on the gas-measured total hydrocarbon value in the gas-measured total hydrocarbon influence model of the total desorption analysis value of the corresponding layer.
5. The method for standardized evaluation of reservoir gas content according to the gas logging total hydrocarbon of the claim 1, the 2 or the 3, characterized in that the established gas logging total hydrocarbon influence model when drilling is as follows:
wherein, T tg ' is the gas-measured Total Hydrocarbon value, T, corrected on the basis of time on bit g Measuring the total hydrocarbon data value for the actual measurement while drilling gas, t is the actual measurement drilling time, t b And the standard value is the drilling time standard value.
6. The method for standardized evaluation of reservoir gas content according to the gas logging total hydrocarbon of claim 1, 2 or 3, characterized in that the established gas logging total hydrocarbon influence model of the well drilling liquid discharge is as follows:
wherein, T Qg ' gas Total Hydrocarbon value, T, corrected for well drainage g Measuring the data value of all hydrocarbons for actual measurement while drilling gas, Q is the measured drilling liquid discharge, Q b And the standard value of the drilling liquid discharge is obtained.
7. The method for evaluating the gas content of the reservoir stratum according to the gas measurement total hydrocarbon standardization of the claim 1, the claim 2 or the claim 3 is characterized in that the influence relation of the gas measurement total hydrocarbon value of each layer to the gas measurement total hydrocarbon value is obtained through fitting according to the gas measurement total hydrocarbon value and the total desorption analysis value of each layer.
8. The method for standardized evaluation of reservoir gas content through gas logging of the whole hydrocarbon according to claim 7, wherein the established gas logging whole hydrocarbon influence model of the total desorption analysis value is as follows:
T Tg ′＝a×T g +b
wherein, T g The method is characterized in that a is a coefficient and b is a constant for actually measuring the data value of the whole hydrocarbon while drilling gas measurement.
9. The method for evaluating the gas content of the reservoir by gas logging full hydrocarbon standardization according to claim 1, characterized in that in the step 1),
if the actual measurement while drilling gas measurement total hydrocarbon value is larger than 10%, dividing the target layer into gas layers;
if the actual measurement is 3% -10% of the total hydrocarbon value measured while drilling, dividing the target layer into a gas difference layer;
and if the actual measurement while drilling gas measurement total hydrocarbon value is less than 3%, dividing the target layer into dry layers.
10. An apparatus for standardized evaluation of reservoir gas content by gas logging of whole hydrocarbons, comprising a processor and a memory, wherein the processor executes a computer program stored by the memory to implement the method for standardized evaluation of reservoir gas content by gas logging of whole hydrocarbons as claimed in any one of claims 1 to 9.
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| CN108194077A (en) * | 2017-12-15 | 2018-06-22 | 中国石油集团川庆钻探工程有限公司 | Gas logging total hydrocarbon correction method |
| CN108763751A (en) * | 2018-05-28 | 2018-11-06 | 中石化石油工程技术服务有限公司 | The bearing calibration of total hydrocarbon in gas logging data in a kind of petroleum geology well logging |
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| CN108194077A (en) * | 2017-12-15 | 2018-06-22 | 中国石油集团川庆钻探工程有限公司 | Gas logging total hydrocarbon correction method |
| CN108763751A (en) * | 2018-05-28 | 2018-11-06 | 中石化石油工程技术服务有限公司 | The bearing calibration of total hydrocarbon in gas logging data in a kind of petroleum geology well logging |
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