Gas logging total hydrocarbon standardization method and device considering drilling fluid density influence, medium and equipment

Abstract

The invention relates to a gas logging total hydrocarbon standardization method and device considering drilling fluid density influence, a medium and equipment. The method comprises the following steps: collecting gas logging total hydrocarbon data of a drilled well and corresponding actual drilling parameters; selecting a standard layer of the work area, and setting standard parameters of the work area based on the standard layer; calculating a drilling time correction coefficient, a displacement correction coefficient, a drill bit correction coefficient and a drilling fluid density correction coefficient based on the actual drilling parameters and the standard parameters; and based on the drilling time correction coefficient, the displacement correction coefficient, the drill bit correction coefficient and the drilling fluid density correction coefficient, correcting the gas logging total hydrocarbon data of the drilled well to obtain a gas logging total hydrocarbon standardization result considering the drilling fluid density influence. According to the method, gas logging total hydrocarbon data can be corrected more accurately, and the influence of the drilling fluid density on a gas logging result is eliminated, so that the content of formation gas is reflected more truly.

Description

Technical Field

[0001] The invention relates to a gas detection full hydrocarbon standardization method, device, medium and equipment taking into account the influence of drilling fluid density, belonging to the technical field of petroleum exploration and drilling. Background Art

[0002] Total hydrocarbons in gas logging refers to the total content of all hydrocarbon gases in the drilling mud detected by gas logging technology during the oil exploration drilling process. It includes methane, ethane, propane, butane and alkane gases with higher carbon numbers. The value of total hydrocarbons in gas logging can reflect the abundance of hydrocarbon substances in the formation, and is usually used to determine the existence of oil and gas layers and the strength of oil and gas displays. In the drilling process, total hydrocarbons in gas logging is an important parameter for evaluating underground oil and gas reservoirs. Standardization of total hydrocarbons in gas logging refers to the standardization of total hydrocarbons in gas logging so that the gas measurement results under different drilling conditions can be analyzed for comparability. The core concept is to eliminate the influence of changes in drilling parameters (such as drilling time, drill bit, displacement, etc.) on the results of total hydrocarbons in gas logging through standardization, so that the total hydrocarbon data in gas logging can reflect the relatively true gas content in the formation.

[0003] The existing gas logging total hydrocarbon standardization method usually corrects the gas logging total hydrocarbon data by removing the influence of drilling parameters such as drilling time, displacement, and drill bit diameter, so that it can more truly reflect the content of formation gas. The specific approach is as follows: first, select standard parameters (standard drilling time, standard drill bit diameter, standard displacement), and then correct the drilling gas logging total hydrocarbons. However, the conventional method does not consider the influence of drilling fluid density on gas logging total hydrocarbons. The higher the drilling fluid density, the smaller the gas logging total hydrocarbon value; the lower the drilling fluid density, the larger the gas logging total hydrocarbon value. Therefore, the existing gas logging total hydrocarbon standardization method has certain limitations, and the gas logging total hydrocarbon standardization results that do not consider the influence of drilling fluid density cannot fully reflect the actual formation gas content. Summary of the invention

[0004] In response to the above technical problems, the present invention provides a gas logging total hydrocarbon standardization method, device, medium and equipment that takes into account the influence of drilling fluid density. This method can more accurately correct the gas logging total hydrocarbon data, eliminate the influence of drilling fluid density on gas logging results, and thus more truly reflect the content of formation gas.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A gas logging total hydrocarbon standardization method considering the influence of drilling fluid density, comprising: Collect the full hydrocarbon data of the drilled wells and the corresponding actual drilling parameters; Select the standard layer of this work area and set the standard parameters of this work area based on the standard layer; Based on the actual drilling parameters and standard parameters, calculate the drilling time correction factor, displacement correction factor, drill bit correction factor and drilling fluid density correction factor; Based on the drilling time correction factor, displacement correction factor, drill bit correction factor and drilling fluid density correction factor, the gas logging total hydrocarbon data of the drilled wells are corrected to obtain the gas logging total hydrocarbon standardized result considering the influence of drilling fluid density.

[0006] In the gas logging total hydrocarbon standardization method considering the influence of drilling fluid density, preferably, the actual drilling parameters include actual drilling time, actual displacement, actual drill bit diameter and actual drilling fluid density; the standard parameters include standard drilling time, standard drill bit diameter, standard displacement and standard drilling fluid density.

[0007] The gas logging total hydrocarbon standardization method considering the influence of drilling fluid density preferably calculates the drilling time correction coefficient K T The formula is as follows: K T =T A / T N Where, T A is the actual drilling time; T N Standard drilling time.

[0008] The gas logging total hydrocarbon standardization method considering the influence of drilling fluid density preferably calculates the displacement correction coefficient K Q The formula is as follows: K Q =Q A / Q N In the formula, Q A is the actual displacement; Q N For standard displacement.

[0009] The gas logging total hydrocarbon standardization method considering the influence of drilling fluid density preferably calculates the drill bit correction coefficient K S The formula is as follows: K S =D N 2 / (D A 2 -d A 2 ) Where D A is the actual drill bit outer diameter; d A is the actual inner diameter of the drill bit; D N This is the standard drill bit outer diameter.

[0010] The gas logging total hydrocarbon standardization method considering the influence of drilling fluid density preferably calculates the drilling fluid density correction factor K M The formula is as follows: K M =M A / M N Where M A is the actual drilling fluid density; M N is the standard drilling fluid density.

[0011] The method for normalizing total hydrocarbons in gas logging by considering the influence of drilling fluid density preferably calculates the normalized result C of total hydrocarbons in gas logging by considering the influence of drilling fluid density. N The formula is as follows: C N =C A ×K T ×K Q ×K S ×K M In the formula, C A The actual total hydrocarbons.

[0012] The second aspect of the present invention provides a gas logging full hydrocarbon standardization device taking into account the influence of drilling fluid density, comprising: The first processing unit is used to collect the gas logging full hydrocarbon data of the drilled well and the corresponding actual drilling parameters; The second processing unit is used to select a standard layer of the work area and set standard parameters of the work area based on the standard layer; A third processing unit is used to calculate a drilling time correction factor, a displacement correction factor, a drill bit correction factor and a drilling fluid density correction factor based on actual drilling parameters and standard parameters; The fourth processing unit is used to correct the gas logging total hydrocarbon data of the drilled well based on the drilling time correction coefficient, the displacement correction coefficient, the drill bit correction coefficient and the drilling fluid density correction coefficient to obtain the gas logging total hydrocarbon standardized result considering the influence of the drilling fluid density.

[0013] A third aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any one of the above-mentioned methods for standardizing total hydrocarbon logging in consideration of the influence of drilling fluid density.

[0014] A fourth aspect of the present invention provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the steps of any one of the above-mentioned methods for standardizing total hydrocarbon logging in consideration of the influence of drilling fluid density.

[0015] The present invention adopts the above technical solution, which has the following advantages: 1. The present invention introduces a correction coefficient for the drilling fluid density, thereby making the standardized processing of gas logging total hydrocarbons more accurate and being able to more truly reflect the content of hydrocarbon substances in the formation.

[0016] 2. The method of the present invention is applicable to drilling fluid systems of various densities and can eliminate the influence of drilling fluid density on gas logging total hydrocarbon data, thereby improving the accuracy of oil and gas layer identification.

[0017] 3. The present invention significantly improves the accuracy and reliability of gas detection full hydrocarbon standardization by realizing gas detection full hydrocarbon standardization taking into account the influence of drilling fluid density, and provides a new gas detection full hydrocarbon standardization method for the oil drilling field. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention is described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work are within the scope of protection of the present invention.

[0019] Unless otherwise defined, the technical or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second", "third", "fourth" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0021] The existing gas logging total hydrocarbon standardization method usually corrects the gas logging total hydrocarbon data by removing the influence of drilling parameters such as drilling time, displacement, and drill bit diameter, so that it can more truly reflect the content of formation gas. The specific approach is as follows: first, select standard parameters (standard drilling time, standard drill bit diameter, standard displacement), and then correct the drilling gas logging total hydrocarbons. However, the conventional method does not consider the influence of drilling fluid density on gas logging total hydrocarbons. The higher the drilling fluid density, the smaller the gas logging total hydrocarbon value; the lower the drilling fluid density, the larger the gas logging total hydrocarbon value. Therefore, the existing gas logging total hydrocarbon standardization method has certain limitations, and the gas logging total hydrocarbon standardization results that do not consider the influence of drilling fluid density cannot fully reflect the actual formation gas content.

[0022] Based on the above technical problems, the present invention provides a gas logging total hydrocarbon standardization method, device, medium and equipment that takes into account the influence of drilling fluid density. This method can more accurately correct the gas logging total hydrocarbon data, eliminate the influence of drilling fluid density on gas logging results, and thus more truly reflect the content of formation gas.

[0023] The gas detection total hydrocarbon standardization method considering the influence of drilling fluid density provided by the present invention comprises the following specific steps: Step S1: Collect the gas logging full hydrocarbon data of the drilled well and the corresponding drilling parameters, including the actual drilling time T A 、Actual displacement Q A , actual drill bit diameter and actual drilling fluid density M A ; Step S2: Select the standard layer of the work area and set the standard parameters of the work area based on the standard layer (including standard drilling time T N , Standard drill diameter D N 、Standard displacement Q N and standard drilling fluid density M N ); Step S3: Calculate the drilling time correction coefficient K T ; Among them, the calculation of the drilling time correction coefficient K T The formula expression is: K T =T A / T N (Formula 1) Where, T A is the actual drilling time; T N Standard drilling time.

[0024] Step S4: Calculate the displacement correction coefficient K Q ; Among them, the displacement correction factor K is calculated Q The formula expression is: K Q =Q A / Q N (Formula 2) In the formula, Q A is the actual displacement; Q N For standard displacement.

[0025] Step S5: Calculate the drill correction coefficient K S ; Among them, calculate the drill correction coefficient K S The formula expression is: K S =D N 2 / (D A 2 -d A 2 ) (Formula 3) Where D A is the actual drill bit outer diameter; d A is the actual inner diameter of the drill bit; D NThis is the standard drill bit outer diameter.

[0026] Step S6: Calculate the drilling fluid density correction factor K M ; Among them, the calculation of drilling fluid density correction factor K M The formula expression is: K M =M A / M N (Formula 4) Where M A is the actual drilling fluid density; M N is the standard drilling fluid density.

[0027] Step S7: using the gas logging total hydrocarbon standardization method considering the influence of drilling fluid density proposed in the present invention, the gas logging total hydrocarbon data of the drilled well is corrected to obtain the gas logging total hydrocarbon standardization result C considering the influence of drilling fluid density. N .

[0028] Among them, the calculation of the normalized result of gas logging total hydrocarbon considering the influence of drilling fluid density is C N The formula expression is: C N =C A ×K T ×K Q ×K S ×K M (Formula 5) In the formula, C A is the actual total hydrocarbon; K T K is the drilling correction factor; Q is the displacement correction factor; K S is the drill correction factor; K M is the drilling fluid density correction factor.

[0029] The second aspect of the present invention provides a gas logging full hydrocarbon standardization device taking into account the influence of drilling fluid density, comprising: The first processing unit is used to collect the gas logging full hydrocarbon data of the drilled well and the corresponding actual drilling parameters; The second processing unit is used to select a standard layer of the work area and set standard parameters of the work area based on the standard layer; A third processing unit is used to calculate a drilling time correction factor, a displacement correction factor, a drill bit correction factor and a drilling fluid density correction factor based on actual drilling parameters and standard parameters; The fourth processing unit is used to correct the gas logging total hydrocarbon data of the drilled well based on the drilling time correction coefficient, the displacement correction coefficient, the drill bit correction coefficient and the drilling fluid density correction coefficient to obtain the gas logging total hydrocarbon standardized result considering the influence of the drilling fluid density.

[0030] A third aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any one of the above-mentioned methods for standardizing total hydrocarbon logging in consideration of the influence of drilling fluid density.

[0031] A fourth aspect of the present invention provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the steps of any one of the above-mentioned methods for standardizing total hydrocarbon logging in consideration of the influence of drilling fluid density.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gas logging total hydrocarbon standardization method considering the influence of drilling fluid density, characterized in that: include: Collect the full hydrocarbon data of the drilled wells and the corresponding actual drilling parameters; Select the standard layer of this work area and set the standard parameters of this work area based on the standard layer; Based on the actual drilling parameters and standard parameters, calculate the drilling time correction factor, displacement correction factor, drill bit correction factor and drilling fluid density correction factor; Based on the drilling time correction factor, displacement correction factor, drill bit correction factor and drilling fluid density correction factor, the gas logging total hydrocarbon data of the drilled wells are corrected to obtain the gas logging total hydrocarbon standardized result considering the influence of drilling fluid density.

2. The gas logging total hydrocarbon standardization method considering the influence of drilling fluid density according to claim 1 is characterized in that: The actual drilling parameters include actual drilling time, actual displacement, actual drill bit diameter and actual drilling fluid density; the standard parameters include standard drilling time, standard drill bit diameter, standard displacement and standard drilling fluid density.

3. The gas logging total hydrocarbon standardization method considering the influence of drilling fluid density according to claim 2 is characterized in that: Calculate the drilling correction factor K T The formula is as follows: K T =T A / T N Where, T A is the actual drilling time; T N Standard drilling time.

4. The gas logging total hydrocarbon standardization method considering the influence of drilling fluid density according to claim 3 is characterized in that: Calculate the displacement correction factor K Q The formula is as follows: K Q =Q A / Q N In the formula, Q A is the actual displacement; Q N For standard displacement.

5. The gas logging total hydrocarbon standardization method considering the influence of drilling fluid density according to claim 4 is characterized in that: Calculate the drill correction factor K S The formula is as follows: K S =D N 2 / (D A 2 -d A 2 ) Where D A is the actual drill bit outer diameter; d A is the actual inner diameter of the drill bit; D N This is the standard drill bit outer diameter.

6. The gas logging total hydrocarbon standardization method considering the influence of drilling fluid density according to claim 5, characterized in that: Calculate the drilling fluid density correction factor K M The formula is as follows: K M =M A / M N Where M A is the actual drilling fluid density; M N is the standard drilling fluid density.

7. The gas logging total hydrocarbon standardization method considering the influence of drilling fluid density according to claim 6 is characterized in that: Calculate the normalized result C of gas logging total hydrocarbon considering the influence of drilling fluid density N The formula is as follows: C N =C A ×K T ×K Q ×K S ×K M In the formula, C A The actual total hydrocarbons.

8. A gas logging total hydrocarbon standardization device considering the influence of drilling fluid density, characterized in that: include: The first processing unit is used to collect the gas logging full hydrocarbon data of the drilled well and the corresponding actual drilling parameters; The second processing unit is used to select a standard layer of the work area and set standard parameters of the work area based on the standard layer; A third processing unit is used to calculate a drilling time correction factor, a displacement correction factor, a drill bit correction factor and a drilling fluid density correction factor based on actual drilling parameters and standard parameters; The fourth processing unit is used to correct the gas logging total hydrocarbon data of the drilled well based on the drilling time correction coefficient, the displacement correction coefficient, the drill bit correction coefficient and the drilling fluid density correction coefficient to obtain the gas logging total hydrocarbon standardized result considering the influence of the drilling fluid density.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the gas logging total hydrocarbon standardization method considering the influence of drilling fluid density as described in any one of claims 1 to 7 are implemented.

10. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the gas logging total hydrocarbon standardization method considering the influence of drilling fluid density as described in any one of claims 1-7 are implemented.