CN117927216A - Drilling-level extraction effect evaluation and disaster prediction method and system - Google Patents
Drilling-level extraction effect evaluation and disaster prediction method and system Download PDFInfo
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- 238000000605 extraction Methods 0.000 title claims abstract description 420
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Abstract
The invention discloses a drilling-level extraction effect evaluation and disaster prediction method and system, wherein the drilling-level extraction effect evaluation method comprises the following steps: and (3) for drilling holes in the extraction area, determining the corresponding gas extraction total amount C ZZ, extraction radius and original gas total amount W KY. Determining the residual gas quantity C ZC corresponding to the drilling hole through the original gas total quantity W KY and the gas extraction total quantity C ZZ; comparing and analyzing the residual gas quantity C ZC with the residual gas quantity requirement standard to judge whether the extraction of the drill hole reaches the standard; or determining the drill hole extraction rate B Z through the total gas extraction amount C ZZ and the total original gas amount W KY; and comparing and analyzing the drilling extraction rate B Z with the drilling extraction rate requirement standard to judge whether the drilling extraction reaches the standard. According to the invention, based on mass data monitored by drilling of the extraction area and a corresponding data processing method, extraction effect evaluation and disaster prediction of the extraction area are performed, so that the effect of finely controlling the drilling level of the extraction area is achieved, and the occurrence of gas disaster accidents is reduced.
Description
Technical Field
The invention relates to the field of gas extraction, in particular to a drilling-level extraction effect evaluation and disaster prediction method and system.
Background
At present, the extraction effect evaluation of the extraction area is generally carried out by installing a gas extraction metering device on the total converging pipeline of the extraction drilling holes of the extraction area or the converging pipeline of the extraction drilling holes of each unit (about 200 m), metering the total extraction amount of the whole extraction area or the total extraction amount of each unit, and calculating the residual gas amount of the gas of the whole extraction area or each unit by combining the original gas occurrence condition so as to judge the extraction effect of the extraction area.
The overall evaluation or unit evaluation mode can only play a part in fuzzy reference of the overall extraction effect of the extraction area, and the situation that the overall or unit extraction effect reaches the standard and the local extraction effect does not reach the standard often occurs, so that the reliability of the evaluation result is lower. In the process of mining, local gas emission is overlarge, gas is overrun, even coal and gas outburst accidents occur, and the phenomenon is quite often related to the refined evaluation degree of the extraction effect in the extraction area.
Based on this, there is a need in the art for a drainage effect evaluation and disaster prediction scheme for a drainage area with high reliability and high definition.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a drilling-level extraction effect evaluation and disaster prediction method and system, which can evaluate the extraction effect and predict the disaster of an extraction area, achieve the fine management and control effect on the drilling level of the extraction area and reduce the occurrence of gas disaster accidents.
The invention discloses a drilling-level extraction effect evaluation method, which comprises the following steps:
S11: determining a drilling gas extraction pure quantity C Z corresponding to a drilling hole based on monitoring information of the drilling hole in the extraction area, and determining a gas extraction total quantity C ZZ corresponding to the drilling hole according to the drilling gas extraction pure quantity C Z;
s12: determining the extraction radius of the drill hole;
S13: determining the volume V of a drilling gas extraction evaluation section based on the extraction radius, and further calculating the original gas total amount W KY of the drilling gas extraction evaluation section according to the original gas content H of the average unit volume; wherein the borehole gas extraction evaluation section in the extraction area comprises one borehole;
S14: determining residual gas quantity C ZC corresponding to the drilling hole through the original gas total quantity W KY and the gas extraction total quantity C ZZ; comparing and analyzing the residual gas quantity C ZC with a residual gas quantity requirement standard to judge whether the extraction of the drill hole reaches the standard;
Or determining a borehole extraction rate B Z through the total gas extraction amount C ZZ and the total original gas amount W KY; and comparing and analyzing the drilling extraction rate B Z with a drilling extraction rate requirement standard to judge whether the drilling extraction reaches the standard.
Further, the step S11 includes:
Calculating the borehole gas extraction pure quantity C Z corresponding to the borehole based on the gas concentration, flow, temperature and negative pressure data monitored by the borehole; calculating or fitting calculation is carried out on the basis of the drilling gas extraction pure quantity C Z to obtain the gas extraction total quantity C ZZ corresponding to the drilling;
the step S12 includes:
Calculating and determining the extraction radius of the drilling hole according to the monitoring information and an extraction radius extraction quantity method;
Or taking the effective gas extraction radius of the drill hole as the extraction radius of the drill hole according to the pre-determined effective gas extraction radius of the drill hole; the effective gas extraction radius of the drill hole is a value when the extraction radius of the drill hole increases with time until the effective gas extraction radius of the drill hole tends to be stable;
Or taking half of the interval between adjacent drilling holes in the extraction area as the extraction radius of the drilling holes.
Further, in the step S14, the residual gas amount C ZC is calculated by performing a difference calculation between the original gas total amount W KY and the gas extraction total amount C ZZ;
The borehole extraction rate B Z is calculated by comparing the total gas extraction amount C ZZ with the original total gas amount W KY.
The invention also discloses another drilling-level extraction effect evaluation method, which comprises the following steps:
S21: defining a plurality of fine evaluation intervals L in the extraction area, wherein the fine evaluation intervals L comprise a plurality of drill holes;
S22: determining a drilling gas extraction pure quantity C Z corresponding to a drilling hole based on monitoring information of the drilling hole in the extraction area, and determining a gas extraction total quantity C ZZ corresponding to the drilling hole according to the drilling gas extraction pure quantity C Z; summing the total gas extraction amount C ZZ corresponding to each drilling hole in the refined evaluation interval L to obtain total gas extraction amount C ZL;
s23: determining the extraction radius of the drill hole;
S24: calculating the coal bed volume V L of the fine evaluation interval L based on the extraction radius, and further calculating the original gas total amount W LY of the fine evaluation interval L according to the original gas content H of the average unit volume;
S25: determining residual gas quantity C LC corresponding to the drilling hole through the original gas total quantity W LY and the gas extraction total quantity C ZL; comparing and analyzing the residual gas quantity C LC with a section residual gas quantity requirement standard to judge whether the extraction of the refined evaluation section L reaches the standard;
Or determining a borehole extraction rate B L through the total gas extraction amount C ZL and the total original gas amount W LY; and comparing and analyzing the drilling extraction rate B L with the interval drilling extraction rate requirement standard to judge whether the extraction of the refined evaluation interval L reaches the standard.
Further, the step S1 includes: in the extraction area, a range of X meters towards the coal seam is defined as an interval L, wherein X is greater than 0.
Further, the step S22 includes:
Calculating the borehole gas extraction pure quantity C Z corresponding to the borehole based on the gas concentration, flow, temperature and negative pressure data monitored by the borehole; calculating or fitting calculation is carried out on the basis of the drilling gas extraction pure quantity C Z to obtain the gas extraction total quantity C ZZ corresponding to the drilling; summing the total gas extraction amount C ZZ corresponding to each drilling hole in the refined evaluation interval L to obtain total gas extraction amount C ZL;
the step S23 includes:
Calculating and determining the extraction radius of the drilling hole according to the monitoring information and an extraction radius extraction quantity method;
Or taking the effective gas extraction radius of the drill hole as the extraction radius of the drill hole according to the pre-determined effective gas extraction radius of the drill hole; the effective gas extraction radius of the drill hole is a value when the extraction radius of the drill hole increases with time until the effective gas extraction radius of the drill hole tends to be stable;
Or taking half of the interval between adjacent drilling holes in the extraction area as the extraction radius of the drilling holes.
Further, in S25, the residual gas amount C LC corresponding to the borehole is obtained by performing a difference calculation between the original total gas amount W LY and the total gas extraction amount C ZL;
The borehole extraction rate B L is calculated by comparing the total gas extraction amount C ZL with the original total gas amount W LY.
The invention discloses a disaster prediction method, which comprises the following steps: determining a drilling gas extraction pure quantity C Z corresponding to a drilling hole based on monitoring information of the drilling hole in the extraction area, and determining a gas extraction total quantity C ZZ corresponding to the drilling hole according to the drilling gas extraction pure quantity C Z;
predicting risk is done in any one or several ways:
Firstly, obtaining residual gas quantity C ZC by the first drilling-level extraction effect evaluation method; determining a residual gas quantity average value based on the residual gas quantity C ZC of each of the boreholes in the extraction area; judging whether the higher amount of the residual gas amount C ZC of each drilling hole in the extraction area compared with the average value of the residual gas amount reaches a preset critical value a 1 or whether the lower amount reaches a preset critical value a 2, if so, judging that the extraction area is at risk;
secondly, selecting a time period gas extraction total amount C ZZD reflecting the extraction amount of the designated time period based on the gas extraction total amount C ZZ of the drill hole; determining a time period gas extraction total average value based on the time period gas extraction total amount C ZZD in the extraction area; judging whether the higher amount of the total gas extraction amount C ZZD of each drilling hole in the extraction area compared with the average value of the total gas extraction amount in the time period reaches a preset critical value b 1 or whether the lower amount reaches a preset critical value b 2, if so, judging that the corresponding drilling hole has risk;
thirdly, based on the monitoring information of each drilling hole, judging whether the number of fluctuation anomalies changing along with time exceeds a corresponding preset parameter fluctuation critical value, if so, judging that the corresponding drilling hole has risks; wherein the monitoring information includes one or more of the following: and (3) gas concentration, flow, temperature, negative pressure data and the borehole gas extraction pure quantity C Z.
The invention also discloses another disaster prediction method, which comprises the following steps: defining a plurality of fine evaluation intervals L in the extraction area, wherein the fine evaluation intervals L comprise a plurality of drill holes; determining a drilling gas extraction pure quantity C Z corresponding to a drilling hole based on monitoring information of the drilling hole in the extraction area, and determining a gas extraction total quantity C ZZ corresponding to the drilling hole according to the drilling gas extraction pure quantity C Z; summing the total gas extraction amount C ZZ corresponding to each drilling hole in the refined evaluation interval L to obtain total gas extraction amount C ZL;
predicting risk is done in any one or several ways:
Firstly, obtaining residual gas quantity C LC by the second drilling-level extraction effect evaluation method; determining a residual gas quantity average value based on the residual gas quantity C LC of each section L in the extraction area; judging whether the higher amount of the residual gas amount C LC of each drilling hole in the extraction area compared with the average value of the residual gas amount reaches a preset critical value a, if so, judging that the extraction area is at risk;
Secondly, selecting a time period gas extraction total amount C ZLD reflecting the extraction amount of the designated time period based on the gas extraction total amount C ZL of the interval L; determining a time period gas extraction total average value based on the time period gas extraction total amount C ZLD in the extraction area; judging whether the higher amount of the time period gas extraction total amount C ZLD of each interval L of the extraction area compared with the time period gas extraction total amount average value reaches a preset critical value b or not, if so, judging that the corresponding interval L has risks;
thirdly, based on the monitoring information of each drilling hole, judging whether the number of fluctuation anomalies changing along with time exceeds a corresponding preset parameter fluctuation critical value, if so, judging that the corresponding drilling hole has risks; wherein the monitoring information includes one or more of the following: and (3) gas concentration, flow, temperature, negative pressure data and the drilling gas extraction pure CZ.
10. The drilling-level extraction effect evaluation and disaster prediction matching system is characterized by comprising: the system comprises a data acquisition layer, a database, a data processing layer and a display interface;
the data acquisition layer comprises: the automatic monitoring device or the automatic inspection device for the drilling is used for automatically collecting the gas extraction parameters of each drilling at each time point in real time or at high frequency; or further comprises a converging pipeline monitoring device;
the database comprises: the database industrial personal computer or the database server is used for classifying and storing the uploaded data acquired by the data acquisition layer or manually input data;
The data processing layer comprises: the data processing layer industrial personal computer or the data processing layer server is internally provided with an algorithm model built by using any drilling-level extraction effect evaluation method or any disaster prediction method, and performs calculation, analysis and judgment based on the data of the database;
The interface display layer comprises: the display screen is used for intuitively displaying gas parameter data such as gas concentration, flow, negative pressure, temperature and the like of each drilling hole and the processing result of the data processing layer in a chart or visual model mode; or the monitoring data and the processing result of the converging pipeline monitoring device are displayed.
The invention has at least the following beneficial effects:
According to the invention, based on the mass data of automatic monitoring or automatic inspection of the gas extraction drilling and the corresponding data processing method, extraction effect evaluation and disaster prediction of the extraction area are carried out, so that the fine management and control effect on the drilling level of the extraction area is achieved, and the occurrence of gas disaster accidents is reduced.
Other advantageous effects of the present invention will be described in detail in the detailed description section.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a construction arrangement and an effect evaluation structure of a gas extraction borehole in an extraction area according to an embodiment of the present invention.
Fig. 2 is a flowchart of a method for evaluating a drilling-level extraction effect according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a construction arrangement and an effect evaluation structure of a gas extraction borehole in an extraction area according to a second embodiment of the present invention.
Fig. 4 is a flowchart of a drilling-level extraction effect evaluation method according to a second embodiment of the present invention.
Fig. 5 is a system for evaluating the extraction effect and predicting disasters of a drilling grade according to a third embodiment of the present invention.
The system comprises a 1-extraction area, a 2-roadway, a 3-gas extraction drill hole, a 4-extraction pipeline system and a 5-drill hole gas extraction evaluation section.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, based on the examples herein, which are within the scope of the invention as defined by the claims, will be within the scope of the invention as defined by the claims.
Example 1
As shown in fig. 1, in the extraction area applied in this embodiment, a gas extraction drill hole 3 is constructed and arranged from a roadway 2 into a coal seam of the extraction area 1, the gas extraction drill hole 3 is extracted through an extraction pipeline system 4, the extraction area includes a plurality of drilling gas extraction evaluation sections 5, and each drilling gas extraction evaluation section 5 includes a drilling hole.
As shown in fig. 2, the invention discloses a drilling-level extraction effect evaluation method, which comprises the following steps:
S11: and determining a drilling gas extraction pure quantity C Z corresponding to the drilling based on monitoring information of the drilling in the extraction area, and determining a gas extraction total quantity C ZZ corresponding to the drilling according to the drilling gas extraction pure quantity C Z.
S12: determining the extraction radius of the drill hole;
S13: determining the volume V of a drilling gas extraction evaluation section based on the extraction radius, and further calculating the original gas total amount W KY of the drilling gas extraction evaluation section according to the original gas content H of the average unit volume; wherein the borehole gas extraction evaluation section in the extraction area comprises one borehole;
S14: determining residual gas quantity C ZC corresponding to the drilling hole through the original gas total quantity W KY and the gas extraction total quantity C ZZ; comparing and analyzing the residual gas quantity C ZC with a residual gas quantity requirement standard to judge whether the extraction of the drill hole reaches the standard;
Or determining a borehole extraction rate B Z through the total gas extraction amount C ZZ and the total original gas amount W KY; and comparing and analyzing the drilling extraction rate B Z with a drilling extraction rate requirement standard to judge whether the drilling extraction reaches the standard.
In some preferred embodiments of the present invention, the step S11 includes:
Calculating the borehole gas extraction pure quantity C Z corresponding to the borehole based on the gas concentration, flow, temperature and negative pressure data monitored by the borehole; calculating or fitting calculation is carried out on the basis of the drilling gas extraction pure quantity C Z to obtain the gas extraction total quantity C ZZ corresponding to the drilling;
in some preferred embodiments of the present invention, for the step S12, the extraction radius may be determined in three ways:
(1) And calculating and determining the extraction radius of the drilling hole according to the monitoring information and an extraction radius extraction quantity method.
(2) And taking the effective gas extraction radius of the drill hole as the extraction radius of the drill hole according to the pre-determined effective gas extraction radius of the drill hole. The effective gas extraction radius of the drill hole is a value when the extraction radius of the drill hole increases with time until the effective gas extraction radius of the drill hole tends to be stable.
(3) And taking half of the interval between adjacent drilling holes in the extraction area as the extraction radius of the drilling holes.
In some preferred embodiments of the present invention, in the step S14, the residual gas amount C ZC is calculated by subtracting the original total gas amount W KY from the total gas extraction amount C ZZ.
The borehole extraction rate B Z is calculated by comparing the total gas extraction amount C ZZ with the original total gas amount W KY.
The embodiment also discloses a disaster prediction method, which comprises the following steps: determining a drilling gas extraction pure quantity C Z corresponding to a drilling hole based on monitoring information of the drilling hole in the extraction area, and determining a gas extraction total quantity C ZZ corresponding to the drilling hole according to the drilling gas extraction pure quantity C Z;
predicting risk is done in any one or several ways:
in the first mode, the residual gas amount C ZC is obtained by the drilling-level extraction effect evaluation method described in the present embodiment; determining a residual gas quantity average value based on the residual gas quantity C ZC of each of the boreholes in the extraction area; judging whether the higher amount of the residual gas amount C ZC of each drilling hole in the extraction area compared with the average value of the residual gas amount reaches a preset critical value a 1 or whether the lower amount reaches a preset critical value a 2, if so, judging that the extraction area is at risk;
Selecting a time period gas extraction total amount C ZZD reflecting the extraction amount of the designated time period based on the gas extraction total amount C ZZ of the drill hole; determining a time period gas extraction total average value based on the time period gas extraction total amount C ZZD in the extraction area; judging whether the higher amount of the total gas extraction amount C ZZD of each drilling hole in the extraction area compared with the average value of the total gas extraction amount in the time period reaches a preset critical value b 1 or whether the lower amount reaches a preset critical value b 2, if so, judging that the corresponding drilling hole has risk;
Judging whether the number of fluctuation anomalies changing with time exceeds a corresponding preset parameter fluctuation critical value or not based on the monitoring information of each drilling hole, and if so, judging that the corresponding drilling hole has risks; wherein the monitoring information includes one or more of the following: and (3) gas concentration, flow, temperature and negative pressure data, and the borehole gas extraction pure quantity C Z.
Example two
As shown in fig. 3, in the extraction area applied in this embodiment, a gas extraction drill hole 3 is constructed and arranged from a roadway 2 into the coal seam of the extraction area 1, and the gas extraction drill hole 3 is extracted through an extraction pipeline system 4, and the extraction area includes a manually defined domain refinement evaluation interval L, for example, a range of 20m of the trend of the coal seam.
As shown in fig. 4, this embodiment discloses a drilling-level extraction effect evaluation method, which includes:
S21: defining a plurality of fine evaluation intervals L in the extraction area, wherein the fine evaluation intervals L comprise a plurality of drill holes;
S22: determining a drilling gas extraction pure quantity C Z corresponding to a drilling hole based on monitoring information of the drilling hole in the extraction area, and determining a gas extraction total quantity C ZZ corresponding to the drilling hole according to the drilling gas extraction pure quantity C Z; summing the total gas extraction amount C ZZ corresponding to each drilling hole in the refined evaluation interval L to obtain total gas extraction amount C ZL;
s23: determining the extraction radius of the drill hole;
S24: calculating the coal bed volume V L of the fine evaluation interval L based on the extraction radius, and further calculating the original gas total amount W LY of the fine evaluation interval L according to the original gas content H of the average unit volume;
S25: determining residual gas quantity C LC corresponding to the drilling hole through the original gas total quantity W LY and the gas extraction total quantity C ZL; comparing and analyzing the residual gas quantity C LC with a section residual gas quantity requirement standard to judge whether the extraction of the refined evaluation section L reaches the standard;
Or determining a borehole extraction rate B L through the total gas extraction amount C ZL and the total original gas amount W LY; and comparing and analyzing the drilling extraction rate B L with the interval drilling extraction rate requirement standard to judge whether the extraction of the refined evaluation interval L reaches the standard.
In some preferred embodiments of the present invention, the step S1 includes: in the extraction area, a range of X meters towards the coal seam is defined as an interval L, wherein X is greater than 0.
In some preferred embodiments of the present invention, the step S22 includes:
Calculating the borehole gas extraction pure quantity C Z corresponding to the borehole based on the gas concentration, flow, temperature and negative pressure data monitored by the borehole; calculating or fitting calculation is carried out on the basis of the drilling gas extraction pure quantity C Z to obtain the gas extraction total quantity C ZZ corresponding to the drilling; summing the total gas extraction amount C ZZ corresponding to each drilling hole in the refined evaluation interval L to obtain total gas extraction amount C ZL;
In some preferred embodiments of the present invention, for the step S23, the extraction radius may be determined in three ways:
(1) Calculating and determining the extraction radius of the drilling hole according to the monitoring information and an extraction radius extraction quantity method;
(2) Taking the effective gas extraction radius of the drill hole as the extraction radius of the drill hole according to the pre-determined effective gas extraction radius of the drill hole; the effective gas extraction radius of the drill hole is a value when the extraction radius of the drill hole increases with time until the effective gas extraction radius of the drill hole tends to be stable;
(3) And taking half of the interval between adjacent drilling holes in the extraction area as the extraction radius of the drilling holes.
In some preferred embodiments of the present invention, in S25, the residual gas amount C LC corresponding to the borehole is calculated by performing a difference calculation between the original total gas amount W LY and the total gas extraction amount C ZL;
The borehole extraction rate B L is calculated by comparing the total gas extraction amount C ZL with the original total gas amount W LY.
The embodiment also discloses a disaster prediction method, which comprises the following steps: defining a plurality of fine evaluation intervals L in the extraction area, wherein the fine evaluation intervals L comprise a plurality of drill holes; determining a drilling gas extraction pure quantity C Z corresponding to a drilling hole based on monitoring information of the drilling hole in the extraction area, and determining a gas extraction total quantity C ZZ corresponding to the drilling hole according to the drilling gas extraction pure quantity C Z; summing the total gas extraction amount C ZZ corresponding to each drilling hole in the refined evaluation interval L to obtain total gas extraction amount C ZL;
predicting risk is done in any one or several ways:
Firstly, obtaining residual gas quantity C LC by the drilling-level extraction effect evaluation method in the embodiment; determining a residual gas quantity average value based on the residual gas quantity C LC of each section L in the extraction area; judging whether the higher amount of the residual gas amount C LC of each drilling hole in the extraction area compared with the average value of the residual gas amount reaches a preset critical value a 1 or whether the lower amount reaches a preset critical value a 2, if so, judging that the extraction area is at risk;
Secondly, selecting a time period gas extraction total amount C ZLD reflecting the extraction amount of the designated time period based on the gas extraction total amount C ZL of the interval L; determining a time period gas extraction total average value based on the time period gas extraction total amount C ZLD in the extraction area; judging whether the higher amount of the total gas extraction amount C ZLD in the time period of each interval L of the extraction area reaches a preset critical value b 1 or whether the lower amount of the total gas extraction amount C ZLD in the time period of the total gas extraction amount reaches a preset critical value b 2 or not, if so, judging that the corresponding interval L has risks;
thirdly, based on the monitoring information of each drilling hole, judging whether the number of fluctuation anomalies changing along with time exceeds a corresponding preset parameter fluctuation critical value, if so, judging that the corresponding drilling hole has risks; wherein the monitoring information includes one or more of the following: and (3) gas concentration, flow, temperature, negative pressure data and the drilling gas extraction pure CZ.
Example III
As shown in fig. 5, this embodiment discloses a system for evaluating extraction effect and predicting disaster in drilling level, including: the system comprises a data acquisition layer, a database, a data processing layer and a display interface.
Wherein, the data acquisition layer includes: the automatic monitoring device or the automatic inspection device for the drilling is used for automatically collecting the gas extraction parameters of each drilling at each time point in real time or at high frequency; or further comprises a converging pipeline monitoring device.
The database comprises: and the database industrial personal computer or the database server is used for classifying and storing the uploaded data acquired by the data acquisition layer or manually input data.
The data processing layer comprises: the data processing layer industrial personal computer or the data processing layer server is internally provided with an algorithm model established by the drilling-level extraction effect evaluation method disclosed in the first embodiment or the second embodiment or the disaster prediction method disclosed in the first embodiment or the second embodiment, and performs calculation and analysis judgment based on the data of the database.
The interface display layer comprises: the display screen is used for intuitively displaying gas parameter data such as gas concentration, flow, negative pressure, temperature and the like of each drilling hole and the processing result of the data processing layer in a chart or visual model mode; or the monitoring data and the processing result of the converging pipeline monitoring device are displayed.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention.
Claims (10)
1. The drilling-level extraction effect evaluation method is characterized by comprising the following steps of:
S11: determining a drilling gas extraction pure quantity C Z corresponding to a drilling hole based on monitoring information of the drilling hole in the extraction area, and determining a gas extraction total quantity C ZZ corresponding to the drilling hole according to the drilling gas extraction pure quantity C Z;
s12: determining the extraction radius of the drill hole;
S13: determining the volume V of a drilling gas extraction evaluation section based on the extraction radius, and further calculating the original gas total amount W KY of the drilling gas extraction evaluation section according to the original gas content H of the average unit volume; wherein the borehole gas extraction evaluation section in the extraction area comprises one borehole;
S14: determining residual gas quantity C ZC corresponding to the drilling hole through the original gas total quantity W KY and the gas extraction total quantity C ZZ; comparing and analyzing the residual gas quantity C ZC with a residual gas quantity requirement standard to judge whether the extraction of the drill hole reaches the standard;
Or determining a borehole extraction rate B Z through the total gas extraction amount C ZZ and the total original gas amount W KY; and comparing and analyzing the drilling extraction rate B Z with a drilling extraction rate requirement standard to judge whether the drilling extraction reaches the standard.
2. The method for evaluating the extraction effect of the drilling level according to claim 1, wherein the step S11 includes:
Calculating the borehole gas extraction pure quantity C Z corresponding to the borehole based on the gas concentration, flow, temperature and negative pressure data monitored by the borehole; calculating or fitting calculation is carried out on the basis of the drilling gas extraction pure quantity C Z to obtain the gas extraction total quantity C ZZ corresponding to the drilling;
the step S12 includes:
Calculating and determining the extraction radius of the drilling hole according to the monitoring information and an extraction radius extraction quantity method;
Or taking the effective gas extraction radius of the drill hole as the extraction radius of the drill hole according to the pre-determined effective gas extraction radius of the drill hole; the effective gas extraction radius of the drill hole is a value when the extraction radius of the drill hole increases with time until the effective gas extraction radius of the drill hole tends to be stable;
Or taking half of the interval between adjacent drilling holes in the extraction area as the extraction radius of the drilling holes.
3. The method for evaluating the extraction effect of the drill hole according to claim 1, wherein in the step S14, the residual gas amount C ZC is calculated by subtracting the original total gas amount W KY from the total gas extraction amount C ZZ;
The borehole extraction rate B Z is calculated by comparing the total gas extraction amount C ZZ with the original total gas amount W KY.
4. The drilling-level extraction effect evaluation method is characterized by comprising the following steps of:
S21: defining a plurality of fine evaluation intervals L in the extraction area, wherein the fine evaluation intervals L comprise a plurality of drill holes;
S22: determining a drilling gas extraction pure quantity C Z corresponding to a drilling hole based on monitoring information of the drilling hole in the extraction area, and determining a gas extraction total quantity C ZZ corresponding to the drilling hole according to the drilling gas extraction pure quantity C Z; summing the total gas extraction amount C ZZ corresponding to each drilling hole in the refined evaluation interval L to obtain total gas extraction amount C ZL;
s23: determining the extraction radius of the drill hole;
S24: calculating the coal bed volume V L of the fine evaluation interval L based on the extraction radius, and further calculating the original gas total amount W LY of the fine evaluation interval L according to the original gas content H of the average unit volume;
S25: determining residual gas quantity C LC corresponding to the drilling hole through the original gas total quantity W LY and the gas extraction total quantity C ZL; comparing and analyzing the residual gas quantity C LC with a section residual gas quantity requirement standard to judge whether the extraction of the refined evaluation section L reaches the standard;
Or determining a borehole extraction rate B L through the total gas extraction amount C ZL and the total original gas amount W LY; and comparing and analyzing the drilling extraction rate B L with the interval drilling extraction rate requirement standard to judge whether the extraction of the refined evaluation interval L reaches the standard.
5. The method for evaluating the extraction effect of the drill hole according to claim 4, wherein the step S1 comprises: in the extraction area, a range of X meters towards the coal seam is defined as an interval L, wherein X is greater than 0.
6. The method for evaluating the extraction effect of the drill hole according to claim 4, wherein the step S22 includes:
Calculating the borehole gas extraction pure quantity C Z corresponding to the borehole based on the gas concentration, flow, temperature and negative pressure data monitored by the borehole; calculating or fitting calculation is carried out on the basis of the drilling gas extraction pure quantity C Z to obtain the gas extraction total quantity C ZZ corresponding to the drilling; summing the total gas extraction amount C ZZ corresponding to each drilling hole in the refined evaluation interval L to obtain total gas extraction amount C ZL;
the step S23 includes:
Calculating and determining the extraction radius of the drilling hole according to the monitoring information and an extraction radius extraction quantity method;
Or taking the effective gas extraction radius of the drill hole as the extraction radius of the drill hole according to the pre-determined effective gas extraction radius of the drill hole; the effective gas extraction radius is the maximum value which can be kept unchanged and is increased with time;
Or taking half of the interval between adjacent drilling holes in the extraction area as the extraction radius of the drilling holes.
7. The method for evaluating a drilling-level extraction effect according to claim 4, wherein in S25, the residual gas amount C LC corresponding to the drilling is obtained by performing a difference calculation between the original total gas amount W LY and the total gas extraction amount C ZL;
The borehole extraction rate B L is calculated by comparing the total gas extraction amount C ZL with the original total gas amount W LY.
8. A disaster prediction method, comprising: determining a drilling gas extraction pure quantity C Z corresponding to a drilling hole based on monitoring information of the drilling hole in the extraction area, and determining a gas extraction total quantity C ZZ corresponding to the drilling hole according to the drilling gas extraction pure quantity C Z;
predicting risk is done in any one or several ways:
Firstly, obtaining a residual gas amount C ZC by the borehole-grade extraction effect evaluation method according to any one of claims 1 to 3; determining a residual gas quantity average value based on the residual gas quantity C ZC of each of the boreholes in the extraction area; judging whether the higher amount of the residual gas amount C ZC of each drilling hole in the extraction area compared with the average value of the residual gas amount reaches a preset critical value a 1 or whether the lower amount reaches a preset critical value a 2, if so, judging that the extraction area is at risk;
secondly, selecting a time period gas extraction total amount C ZZD reflecting the extraction amount of the designated time period based on the gas extraction total amount C ZZ of the drill hole; determining a time period gas extraction total average value based on the time period gas extraction total amount C ZZD in the extraction area; judging whether the higher amount of the total gas extraction amount C ZZD of each drilling hole in the extraction area compared with the average value of the total gas extraction amount in the time period reaches a preset critical value b 1 or whether the lower amount reaches a preset critical value b 2, if so, judging that the corresponding drilling hole has risk;
thirdly, based on the monitoring information of each drilling hole, judging whether the number of fluctuation anomalies changing along with time exceeds a corresponding preset parameter fluctuation critical value, if so, judging that the corresponding drilling hole has risks; wherein the monitoring information includes one or more of the following: and (3) gas concentration, flow, temperature, negative pressure data and the borehole gas extraction pure quantity C Z.
9. A disaster prediction method, comprising: defining a plurality of fine evaluation intervals L in the extraction area, wherein the fine evaluation intervals L comprise a plurality of drill holes; determining a drilling gas extraction pure quantity C Z corresponding to a drilling hole based on monitoring information of the drilling hole in the extraction area, and determining a gas extraction total quantity C ZZ corresponding to the drilling hole according to the drilling gas extraction pure quantity C Z; summing the total gas extraction amount C ZZ corresponding to each drilling hole in the refined evaluation interval L to obtain total gas extraction amount C ZL;
predicting risk is done in any one or several ways:
firstly, obtaining a residual gas amount C LC by the borehole-grade extraction effect evaluation method according to any one of claims 4 to 7; determining a residual gas quantity average value based on the residual gas quantity C LC of each section L in the extraction area; judging whether the higher amount of the residual gas amount C LC of each drilling hole in the extraction area compared with the average value of the residual gas amount reaches a preset critical value a 1 or whether the lower amount reaches a preset critical value a 2, if so, judging that the extraction area is at risk;
Secondly, selecting a time period gas extraction total amount C ZLD reflecting the extraction amount of the designated time period based on the gas extraction total amount C ZL of the interval L; determining a time period gas extraction total average value based on the time period gas extraction total amount C ZLD in the extraction area; judging whether the higher amount of the total gas extraction amount C ZLD in the time period of each interval L of the extraction area reaches a preset critical value b 1 or whether the lower amount of the total gas extraction amount C ZLD in the time period of the total gas extraction amount reaches a preset critical value b 2 or not, if so, judging that the corresponding interval L has risks;
thirdly, based on the monitoring information of each drilling hole, judging whether the number of fluctuation anomalies changing along with time exceeds a corresponding preset parameter fluctuation critical value, if so, judging that the corresponding drilling hole has risks; wherein the monitoring information includes one or more of the following: and (3) gas concentration, flow, temperature, negative pressure data and the drilling gas extraction pure CZ.
10. The drilling-level extraction effect evaluation and disaster prediction matching system is characterized by comprising: the system comprises a data acquisition layer, a database, a data processing layer and a display interface;
the data acquisition layer comprises: the automatic monitoring device or the automatic inspection device for the drilling is used for automatically collecting the gas extraction parameters of each drilling at each time point in real time or at high frequency; or further comprises a converging pipeline monitoring device;
the database comprises: the database industrial personal computer or the database server is used for classifying and storing the uploaded data acquired by the data acquisition layer or manually input data;
The data processing layer comprises: a data processing layer industrial personal computer or a data processing layer server, wherein an algorithm model established by the drilling-level extraction effect evaluation method according to any one of claims 1-3 and 4-7 or the disaster prediction method according to claim 8 or 9 is built in the data processing layer industrial personal computer or the data processing layer server, and calculation, analysis and judgment are performed based on the data of the database;
The interface display layer comprises: the display screen is used for intuitively displaying gas parameter data such as gas concentration, flow, negative pressure, temperature and the like of each drilling hole and the processing result of the data processing layer in a chart or visual model mode; or the monitoring data and the processing result of the converging pipeline monitoring device are displayed.
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