CN115596434A - Method for judging effective drilling interval based on oil pressure threshold - Google Patents
Method for judging effective drilling interval based on oil pressure threshold Download PDFInfo
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- CN115596434A CN115596434A CN202211226091.1A CN202211226091A CN115596434A CN 115596434 A CN115596434 A CN 115596434A CN 202211226091 A CN202211226091 A CN 202211226091A CN 115596434 A CN115596434 A CN 115596434A
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- oil pressure
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
Abstract
The invention discloses a method for judging an effective drilling interval based on an oil pressure threshold, which comprises the following steps of: drilling according to a research area, acquiring a start-stop time interval of each downward drilling, acquiring oil pressure data in the drilling process and drawing a change rule diagram of oil pressure detection data; acquiring an oil pressure threshold according to the oil pressure detection data change rule graph and the time interval of starting and stopping drilling downwards each time; and acquiring an effective drilling interval range according to the oil pressure threshold, and judging an effective drilling interval for re-drilling according to the effective drilling interval range. The method and the device have the advantages that the effective drilling interval of the drilling machine is quickly and effectively judged by monitoring the oil pressure threshold in the drilling process of the drilling machine, so that the accuracy of hole depth data is ensured and manual errors are reduced when the actual hole depth is calculated; manual recording is not needed in the construction process of the drilling machine, so that the labor cost is reduced or the construction period is shortened.
Description
Technical Field
The invention belongs to the technical field of geotechnical engineering investigation, and particularly relates to a method for judging an effective drilling interval based on an oil pressure threshold value.
Background
With the increasing comprehensive national power of China, the investment on infrastructure is gradually increased, especially on public foundation projects such as roads, water conservancy and hydropower. The geological survey can correctly reflect the engineering geological conditions of the site, combine the design and site construction conditions, carry out technical evaluation on different survey stages, provide construction guidance opinions for the projects such as foundation construction, mines, slopes and the like, and serve the whole process of the project construction. Geophysical prospecting and drilling are currently the primary methods of engineering geological exploration. The drilling uses deep drilling mechanical equipment and technology to obtain underground samples, obtains the actual situation of a stratum profile, is the most direct and effective method in geological exploration, is also a key technology for geological detection of unknown areas, and is widely applied to mine production such as drilling geological anomaly investigation, gas drainage and the like. Therefore, the effective acquisition of geological information usually lies in the quality of the drilled hole, the depth of the drilled hole is an important index, and the judgment of the effective drilling time interval of the drilling machine is an important step for calculating the depth of the drilled hole. Many experts both at home and abroad have also conducted correlation studies on important hole depth data. Many experts both at home and abroad have also conducted correlation studies on important hole depth data. The depth of the borehole is determined by determining the number of drill rods, such as Sun Zhifei, either manually or by instrumental counting. Wang Hongguang and the like take a rotary drilling rig as a research object, and detect and acquire the movement depth of a drill rod by using various schemes such as an incremental encoder and the like.
Monitoring management of the aspects of drilling construction quality, hole depth and the like gradually shows a plurality of defects: 1) The manual hole depth counting method has high error probability and low hole depth data accuracy under the condition of lacking field management; 2) The traditional rod counting method is time-consuming and labor-consuming, and the instrument counting method has higher requirements on manual work and drilling technology, and is easily influenced by human. Therefore, it is particularly important how to accurately determine the effective drilling interval based on the oil pressure monitoring data change rule diagram.
Disclosure of Invention
The invention aims to provide a method for judging an effective drilling interval based on an oil pressure threshold, which can quickly and accurately judge the effective drilling interval of a drilling machine so as to be further used for calculating and acquiring the actual drilling depth.
To achieve the above object, the present invention provides a method of determining an effective drilling section based on an oil pressure threshold, comprising the steps of:
drilling according to a research area, acquiring a start-stop time interval of each downward drilling, acquiring oil pressure data in the drilling process and drawing a change rule diagram of oil pressure detection data;
acquiring an oil pressure threshold according to the oil pressure detection data change rule graph and the time interval of starting and stopping drilling downwards each time;
and obtaining an effective drilling interval range according to the oil pressure threshold, and judging an effective drilling interval for secondary drilling according to the effective drilling interval range.
Optionally, the oil pressure detection data change rule diagram includes: and drawing a change rule graph of the oil pressure detection data according to the recorded time as an abscissa and the corresponding oil pressure data as an ordinate.
Optionally, according to the oil pressure detection data change rule diagram, a plurality of effective drilling intervals are divided according to the start-stop time interval of each downward drilling.
Optionally, obtaining the oil pressure threshold according to the oil pressure detection data change law map specifically includes: the method comprises the steps of obtaining an average oil pressure value in an effective drilling interval according to an oil pressure detection data change rule diagram, and obtaining the first sudden change rate of the oil pressure according to the oil pressure detection data change rule diagram.
Optionally, obtaining the effective drilling interval range according to the oil pressure threshold specifically includes: comparing the oil pressure average values of a plurality of effective drilling intervals in data size, and taking an interval formed by the maximum value and the minimum value after comparison as the range of the oil pressure average values of the plurality of effective drilling intervals; comparing data in the oil pressure first mutation change rates of a plurality of effective drilling intervals, and taking the minimum value after comparison as the minimum value of the oil pressure first mutation change rates of the plurality of effective drilling intervals; and obtaining the range of the effective drilling interval according to the range of the average value of the oil pressure of the effective drilling intervals and the minimum value of the first mutation rate of the oil pressure of the effective drilling intervals.
Optionally, the effective drilling interval range is obtained according to the range of the average value of the oil pressures of the effective drilling intervals and the minimum value of the first sudden change rate of the oil pressures of the effective drilling intervals, and the method specifically includes: based on the oil pressure detection data change rule diagram, when the data in the oil pressure detection data change rule diagram simultaneously satisfy the range of the average value of the oil pressure of a plurality of effective drilling intervals is not less than when the minimum value of the first sudden change rate of the oil pressure of the plurality of effective drilling intervals is reached, the corresponding time period is the effective drilling interval which is drilled again.
The invention has the technical effects that: the invention discloses a method for judging an effective drilling interval based on an oil pressure threshold, which can realize the quick and effective judgment of the effective drilling interval by monitoring the oil pressure threshold in the drilling process of a drilling machine, thereby ensuring the accuracy of hole depth data and reducing manual errors when calculating the actual hole depth; manual recording is not needed in the construction process of the drilling machine, so that the labor cost is reduced or the construction period is shortened.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
FIG. 1 is a flow chart illustrating a method for determining an effective drilling interval based on an oil pressure threshold according to an embodiment of the present invention;
FIG. 2 is a graph showing the time-dependent changes of displacement and oil pressure monitoring data in the field drilling process of ZK1 according to the embodiment of the present invention;
FIG. 3 is a graph showing the time-dependent changes of displacement and oil pressure monitoring data in the field drilling process of ZK2 in the embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than here.
As shown in fig. 1, the present embodiment provides a method for determining an effective drilling interval based on an oil pressure threshold, including the steps of:
drilling according to a research area, acquiring a start-stop time interval of each downward drilling, acquiring oil pressure data in the drilling process and drawing a change rule diagram of oil pressure detection data;
acquiring an oil pressure threshold according to the oil pressure detection data change rule graph and the time interval of starting and stopping drilling downwards each time;
and obtaining an effective drilling interval range according to the oil pressure threshold, and judging an effective drilling interval for secondary drilling according to the effective drilling interval range.
Further optimize the scheme, the oil pressure detection data change rule diagram includes: and drawing a change rule graph of the oil pressure detection data according to the recorded time as an abscissa and the corresponding oil pressure data as an ordinate.
And further optimizing the scheme, and dividing a plurality of effective drilling intervals according to the start-stop time interval of downward drilling each time according to the oil pressure detection data change rule diagram.
Further optimization scheme, according to oil pressure detection data change law diagram obtains the oil pressure threshold specifically includes: the method comprises the steps of obtaining an average oil pressure value in an effective drilling interval according to an oil pressure detection data change rule diagram and obtaining the first sudden change rate of the oil pressure according to the oil pressure detection data change rule diagram.
According to the further optimization scheme, the step of obtaining the effective drilling interval range according to the oil pressure threshold specifically comprises the following steps: comparing the oil pressure average values of a plurality of effective drilling intervals in data size, and taking an interval formed by the maximum value and the minimum value after comparison as the range of the oil pressure average values of the plurality of effective drilling intervals; comparing data in the oil pressure first mutation change rates of a plurality of effective drilling intervals, and taking the minimum value after comparison as the minimum value of the oil pressure first mutation change rates of the plurality of effective drilling intervals; and obtaining the range of the effective drilling interval according to the range of the average value of the oil pressure of the effective drilling intervals and the minimum value of the first mutation rate of the oil pressure of the effective drilling intervals.
According to the further optimization scheme, the effective drilling interval range is obtained according to the range of the average value of the oil pressure of the plurality of effective drilling intervals and the minimum value of the first mutation rate of the oil pressure of the plurality of effective drilling intervals, and the method specifically comprises the following steps: based on the oil pressure detection data change rule diagram, when the data in the oil pressure detection data change rule diagram simultaneously satisfy the range of the average value of the oil pressure of a plurality of effective drilling intervals is not less than when the minimum value of the first sudden change rate of the oil pressure of the plurality of effective drilling intervals is reached, the corresponding time period is the effective drilling interval which is drilled again.
1) When the hole is drilled for the first time in a research area (recorded as ZK 1), monitoring is carried out through an intelligent device for monitoring drilling parameters of a drilling machine in real time, the starting and stopping time interval of downward drilling each time is recorded, oil pressure data are collected and collected, a graph of the change rule of the oil pressure monitoring data in the field drilling process is drawn by taking time as an abscissa and oil pressure as an ordinate, and the graph is shown in figure 2.
2) Marking a plurality of downward drilling start and stop time intervals of the drilling hole ZK1 as effective drilling intervals b 1 、b 2 ……b k 。
3) In the effective interval b 1 In which two oil pressure thresholds are obtained, respectively, i.e. 1 Average oil pressure x, first sudden change in oil pressure Rate (5 s inner)y 1 ；
In the same way, the effective drilling interval b is obtained 2 、b 3 、……、b k Threshold value of (1), i.e. average value x of oil pressure 2 、x 3 、……、x k Andoil Initial mutation rate of change (within 5 s)y 2 、y 3 、……、y k 。
4) Within k effective drilling intervalsThe average value of the oil pressure is in the range ofP 1 Oil pressure in k effective drilling intervalsFirst time swelling BecomeMinimum value of rate of change (within 5 s) is P 2 The formula is as follows:
P 1 ＝[min(x 1 ,x 2 ,x 3 ,……,x k ),max(x 1 ,x 2 ,x 3 ,……,x k )] (1)
P 2 ＝min(y 1 ,y 2 ,y 3 ,……,y k ) (2)
5) When re-drilling is required in the same area of investigation (ZK 2), the data is monitored against the in situ drilling process oil pressure, as shown in figure 3,average value of oil pressureWhen in useBelong toP 1 In a range of, andfirst sudden change rate of oil pressure (within 5 s)Greater than P 2 Then, the time period is an effective drilling interval during the construction of the drill hole (ZK 2).
6) And (5) repeating the step 5) in the same research area, and judging effective drilling intervals when other drilling holes (ZK 3 and ZK4 … …) are constructed.
The invention discloses a method for judging an effective drilling interval based on an oil pressure threshold, which realizes the quick and effective judgment of the effective drilling interval by monitoring the oil pressure threshold in the drilling process of a drilling machine, thereby ensuring the accuracy of hole depth data and reducing manual errors when calculating the actual hole depth; manual recording is not needed in the construction process of the drilling machine, so that the labor cost is reduced or the construction period is shortened.
The above description is only for the preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (6)
1. A method of determining an effective drilling interval based on an oil pressure threshold, comprising:
drilling according to a research area, acquiring a start-stop time interval of downward drilling each time, acquiring oil pressure data in a drilling process and drawing an oil pressure detection data change rule diagram;
acquiring an oil pressure threshold according to the oil pressure detection data change rule graph and the time interval of starting and stopping drilling downwards each time;
and obtaining an effective drilling interval range according to the oil pressure threshold, and judging an effective drilling interval for secondary drilling according to the effective drilling interval range.
2. The method of determining an effective drilling interval based on an oil pressure threshold of claim 1, wherein the oil pressure detection data change pattern comprises: and drawing a change rule graph of the oil pressure detection data according to the recorded time as an abscissa and the corresponding oil pressure data as an ordinate.
3. The method for determining an effective drilling interval based on an oil pressure threshold as claimed in claim 1, wherein a plurality of effective drilling intervals are divided by a start-stop time interval of each downward drilling according to the oil pressure detection data change law map.
4. The method of determining an effective drilling interval based on an oil pressure threshold according to claim 3, wherein the obtaining of the oil pressure threshold from the oil pressure detection data change pattern specifically includes: the method comprises the steps of obtaining an average oil pressure value in an effective drilling interval according to an oil pressure detection data change rule diagram and obtaining the first sudden change rate of the oil pressure according to the oil pressure detection data change rule diagram.
5. The method of determining an effective drilling interval based on an oil pressure threshold as set forth in claim 4, wherein obtaining an effective drilling interval range based on the oil pressure threshold specifically comprises: comparing the oil pressure average values of a plurality of effective drilling intervals in data size, and taking an interval formed by the maximum value and the minimum value after comparison as the range of the oil pressure average values of the plurality of effective drilling intervals; comparing data in the oil pressure first mutation rate of a plurality of effective drilling intervals, and taking the minimum value after comparison as the minimum value of the oil pressure first mutation rate of the plurality of effective drilling intervals; and obtaining the range of the effective drilling interval according to the range of the average value of the oil pressure of the effective drilling intervals and the minimum value of the first mutation rate of the oil pressure of the effective drilling intervals.
6. The method of claim 5, wherein obtaining the range of the effective drilling interval according to the range of the average value of the oil pressures of the plurality of effective drilling intervals and the minimum value of the first sudden change rate of the oil pressures of the plurality of effective drilling intervals comprises: based on the oil pressure detection data change rule diagram, when the data in the oil pressure detection data change rule diagram simultaneously satisfy the range of the average value of the oil pressure of a plurality of effective drilling intervals is not less than when the minimum value of the first sudden change rate of the oil pressure of the plurality of effective drilling intervals is reached, the corresponding time period is the effective drilling interval which is drilled again.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117112999A (en) * | 2023-07-24 | 2023-11-24 | 西南交通大学 | Drilling parameter standardized cleaning method and device based on dynamic linear piecewise representation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117112999A (en) * | 2023-07-24 | 2023-11-24 | 西南交通大学 | Drilling parameter standardized cleaning method and device based on dynamic linear piecewise representation |
| CN117112999B (en) * | 2023-07-24 | 2024-03-29 | 西南交通大学 | Drilling parameter standardized cleaning method and device based on dynamic linear piecewise representation |
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