CN105781520A - Ground surface blowout detecting method - Google Patents
Ground surface blowout detecting method Download PDFInfo
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- CN105781520A CN105781520A CN201410812091.9A CN201410812091A CN105781520A CN 105781520 A CN105781520 A CN 105781520A CN 201410812091 A CN201410812091 A CN 201410812091A CN 105781520 A CN105781520 A CN 105781520A
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- oil well
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Abstract
The invention provides a ground surface blowout detecting method. The ground surface blowout detecting method includes the steps that firstly, an electric current field is set up according to a detected oil well, the detected oil well is subjected to potential detection, and initial potential field data of the detected oil well are obtained; secondly, steam is injected into the detected oil well; thirdly, the potential of the detected oil well where the steam is injected is detected, and potential field data after steam injection are obtained; and fourthly, by comparing the initial potential field data of the detected oil well and the potential field data obtained after steam injection, whether blowout of the detected oil well occur is judged. By means of the method, the condition of the detected oil well can be quickly and conveniently detected, blowout cracks are prevented from continuing expanding, and great loss caused by the blowout cracks can be restrained in time.
Description
Technical field
The present invention relates to viscous crude production technical field, alter spray detection method in particular to a kind of earth's surface.
Background technology
At present, heavy oil wells is in process of production, it will usually occur that macrovoid or crack formula alter spray passage in the earth formation.Along with the carrying out of heavy oil wells production development, altering spray passage can progressively expand, and buries place shallower, that ground mulching layer is relatively thin at oil reservoir and produce penetrability microcrack, makes the steam in oil well scurry out earth's surface, causes the substantial amounts of energy and resources loss；And there is bigger potential safety hazard and environmental pollution aborning.Therefore, need a kind of detection method badly and alter spray passage finding out whether earth's surface exists.
Summary of the invention
It is desirable to provide spray detection method is altered on a kind of earth's surface, by this detection method, it is possible to detect that spray passage is altered on earth's surface easily and quickly.
To achieve these goals, altering spray detection method according to a kind of earth's surface provided by the invention, this earth's surface is altered spray detection method and is included: step one, sets up current field according to tested oil well, and tested oil well is carried out potentiometric detection, obtain the initial potential field data of tested oil well；Step 2, injects steam in tested oil well；Step 3, detects the current potential of the tested oil well injecting steam, obtains the potential fields data after injecting steam；Step 4, by the potential fields data after the initial potential field data of relatively tested oil well and injection steam, it is judged that whether tested oil well alters spray.
Further, this step one includes: using tested oil well as power supply positive pole oil well, chooses another oil well as power supply negative pole oil well, makes electric current pass through power supply positive pole oil well and flows to power supply negative pole oil well and form current field；By testing tested oil well current potential in current field, obtain the initial potential field data of tested oil well.
Further, by testing tested oil well current potential in current field, obtain the initial potential field data of tested oil well, including: in the pre-position away from tested oil well, the first test point is set, multiple second test point is set with tested oil well for the toroid in the center of circle, by detecting the current potential between the first test point and each second test point, obtain the potential fields data of tested oil well.
Further, this step 4 includes: the initial potential field data of tested oil well includes the initial potential gradient magnitude between the first test point and each second test point；Inject the potential fields data after steam and include the change electric potential gradient amplitude between the first test point and each second test point；By comparing the difference of initial potential gradient magnitude and change electric potential gradient amplitude, it is judged that whether tested oil well alters spray.
Further, initial potential gradient magnitude and change electric potential gradient amplitude are obtained by electromagnetic measurement instrument.
Further, by comparing the difference of initial potential gradient magnitude and change electric potential gradient amplitude, judge whether tested oil well alters spray, including: when difference is more than or equal to 10 times of the resolution of electromagnetic measurement instrument, the corresponding test point of tested oil well is for altering spray reference point.
Further, power supply negative pole oil well is chosen in the position apart from tested oil well 6 km to 10 kms.
Further, this precalculated position is in the scope of tested oil well 1 to 2 km.
Further, arranging multiple concentric circular with tested oil well for interval, the center of circle, the second test point is arranged on multiple concentric circular.
Further, the spacing between adjacent two concentric circulars is 5 to 10 meters.
Application technical scheme, it is provided that spray detection method is altered on a kind of earth's surface, by setting up current field at tested oil well place, and to carrying out potentiometric detection around tested oil well, obtains the initial potential field data of tested oil well；Injection steam in tested oil well again, and again detect the current potential of tested oil well, obtain the potential fields data after injecting steam, namely can determine whether whether measured oil well exists by the potential fields data after comparing initial potential field data and injecting steam and alter spray crack.Pass through the method, can quickly and conveniently detect the electrical variation characteristic in stratum, spray passage spread is altered in conjunction with producing sound state analysis description, guidance management personnel can take specific aim control measures in time, avoid the continuation altering spray crack to expand, and can contain in time by altering the massive losses that spray crack is brought.
Accompanying drawing explanation
The Figure of description constituting the part of the application is used for providing a further understanding of the present invention, and the schematic description and description of the present invention is used for explaining the present invention, is not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 illustrates that the flow chart of spray detection method is altered on earth's surface provided by the invention；
Fig. 2 illustrates that the operating diagram of spray detection method is altered on earth's surface provided by the invention.
Accompanying drawing is labeled as:
10, power supply positive pole oil well；20, power supply negative pole oil well；
30, the first test point；40, the second test point.
Detailed description of the invention
It should be noted that when not conflicting, the embodiment in the application and the feature in embodiment can be mutually combined.Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
As it is shown in figure 1, the embodiment of the present invention provides a kind of earth's surface to alter spray detection method, this earth's surface is altered spray detection method and is included:
Step one, sets up current field according to tested oil well, and tested oil well is carried out potentiometric detection, obtains the initial potential field data of tested oil well；
Step 2, injects steam in tested oil well；
Step 3, detects the current potential of the tested oil well injecting steam, obtains the potential fields data after injecting steam；
Step 4, by the potential fields data after the initial potential field data of relatively tested oil well and injection steam, it is judged that whether tested oil well alters spray.
Application technical scheme, it is provided that spray detection method is altered on a kind of earth's surface, by setting up current field at tested oil well place, and to carrying out potentiometric detection around tested oil well, obtains the initial potential field data of tested oil well；Steam is injected again in tested oil well, specifically, high-temperature steam can be injected in tested oil well, to cause the change of ground electric field form, the change of formation resistivity is could alter that by changing formation temperature, then the tested oil well after formation resistivity being changed carries out potentiometric detection again, obtains the potential fields data after injecting steam, namely can determine whether whether measured oil well exists by the potential fields data after comparing initial potential field data and injecting steam and alters spray crack.Pass through the method, can quickly and conveniently detect the electrical variation characteristic in stratum, spray passage spread is altered in conjunction with producing sound state analysis description, guidance management personnel can take specific aim control measures in time, avoid the continuation altering spray crack to expand, and can contain in time by altering the massive losses that spray crack is brought.
Further, this step one includes: using tested oil well as power supply positive pole oil well, chooses another oil well as power supply negative pole oil well, makes electric current pass through power supply positive pole oil well and flows to power supply negative pole oil well and form current field；By testing tested oil well current potential in current field, obtain the initial potential field data of tested oil well.
In a specific embodiment provided by the invention, the oil well needing detection is set to power supply positive pole oil well, choose another producing well as power supply negative pole oil well, so can form current field between positive pole oil well and negative pole oil well, by measuring the current potential in its near zone centered by tested oil well, it is possible to obtain the initial potential field data of tested oil well.
Further, by testing tested oil well current potential in current field, obtain the initial potential field data of tested oil well, including: in the pre-position away from tested oil well, the first test point is set, multiple second test point is set with tested oil well for the toroid in the center of circle, by detecting the current potential between the first test point and each second test point, obtain the potential fields data of tested oil well.
Specifically, when obtaining the potential fields data of tested oil well, pre-position between tested oil well and power supply negative pole oil well selects to disturb less place to be used as the first test point, as preferably, to select this first test point in the scope of tested oil well 1 to 2 km；Then, in multiple concentric circular lines that tested oil well is the center of circle, the second test point is set, and each concentric circular lines is respectively provided with multiple second test point, by measuring and record the current potential between each second test point and the first test point, it is possible to obtain the potential fields data of this tested oil well.
Further, this step 4 includes: the initial potential field data of tested oil well includes the initial potential gradient magnitude between the first test point and each second test point；Inject the potential fields data after steam and include the change electric potential gradient amplitude between the first test point and each second test point；By comparing the difference of initial potential gradient magnitude and change electric potential gradient amplitude, it is judged that whether tested oil well alters spray.
In embodiment provided by the invention, the initial potential gradient magnitude between the first test point and each second test point can be obtained by preliminary examination potential fields data, the change electric potential gradient amplitude of initial potential gradient magnitude Yu respective points is compared, namely can determine whether whether this point alters spray by the process between corresponding data.Specifically, processing procedure can by rule of thumb or accuracy of detection specifically set, the present invention can be set by the resolution measuring instrument, as preferably, when difference both it is more than or equal to 10 times of the resolution of measurement instrument, using this second test point as altering spray reference point, due in actually detected, have other factors to disturb, the difference on such as stratum, other electromagnetism interference etc., therefore, after obtaining altering spray reference point, require over and examine further with actual oil field, namely can confirm that whether this second test point is for altering specking.
Further, initial potential gradient magnitude and change electric potential gradient amplitude are obtained by electromagnetic measurement instrument.
Further, by comparing the difference of initial potential gradient magnitude and change electric potential gradient amplitude, judge whether tested oil well alters spray, including: when difference is more than or equal to 10 times of the resolution of electromagnetic measurement instrument, the corresponding test point of tested oil well is for altering spray reference point.
The present invention is by being set as 10 times of the difference resolution more than or equal to electromagnetic measurement instrument by the judgement altering spray reference point so that measurement standard is corresponding with the precision measuring instrument, it is to avoid measures instrument precision to judging that oil well is altered and sprays the interference brought.And in technical scheme in the present invention, it is Primary Reference foundation by comparing the difference of initial potential gradient magnitude and change electric potential gradient amplitude, alter spray passage spread in conjunction with production sound state analysis description and carry out auxiliary judgment so that the judged result of the program is more accurate.
Further, power supply negative pole oil well is chosen in the position apart from tested oil well 6 km to 10 kms.
Specifically, when choosing power supply negative pole oil well, distance between tested oil well and power supply negative pole oil well is set to beyond 6 kms, tested oil well and power supply negative pole oil well can be considered as point source with this, namely tested oil well is positive charge, power supply negative pole oil well is negative charge, so can form comparatively substantially Electric Field Distribution between two oil wells, and due to the restriction of tested measuring appratus, two well spacings from time beyond 10 kms, the signal that measurement instrument senses is comparatively faint, affect testing result, therefore, by the distance controlling between two wells in 6 to 10 kilometer range.
Further, precalculated position is in the scope of tested oil well 1 to 2 km.
In embodiments of the present invention, first test point is arranged in the scope of tested oil well 1 to 2 km, so this first test point can be also considered as point charge, facilitate staff to its measurement, and facilitate the process of data model when the later stage generates potential fields.
Further, arranging multiple concentric circular with tested oil well for interval, the center of circle, the second test point is arranged on multiple concentric circular.
Specifically, it is provided with tested oil well and is positioned apart from multiple concentric circular, spray situation is altered within the scope of this concentric circular to detect, for the ease of arranging, concentric circular can be equally spaced and the second test point is set on multiple concentric circulars, detecting the potential value between the first test point and the second test point with this.
Further, the spacing between adjacent two concentric circulars is 5 to 10 meters.The potential fields data of response measurement can be known by this setting, between concentric circular, be smaller than 5 meters, measurement data density can be made excessive, be greatly increased the workload of staff；When spacing between concentric circular is more than 10 meters, the packing density obtained is little, and potential fields data can be caused inaccurate, it is difficult to determine that it alters the position of specking.
Embodiment one
For the ease of understanding the present invention, as shown in Figure 2, it is provided that the operating diagram of detection method.By being respectively provided with power supply positive pole oil well 10 and power supply negative pole oil well 20 at tested oil well and other any one oil wells, set up current field with this.Then, in the scope apart from tested oil well 1 to 2 km, less local selection the first test point 30 is disturbed；It is arranged around multiple second test point 40 at tested oil well, to detect the current potential between the first test point 30 and the second test point 40, specifically, with tested oil well for the center of circle, interval arranges multiple concentric circular, second test point 40 is arranged on concentric circular, and the spacing between adjacent two concentric circulars is maintained at 5 to 10 meters, so can know the potential fields data of response measurement.By using electromagnetic measurement instrument that the current potential between the first test point 30 and the second test point 40 is detected, it is possible to obtain initial detecting data.High-temperature steam is passed into again in tested oil well, to change the resistivity on earth's surface, potential value is again detected after passing into steam, to obtain change potential data, the two data is compared, when difference both it is more than or equal to 10 times of the resolution of measurement instrument, using this second test point 40 as altering spray reference point, due in actually detected, have other factors to disturb, the difference on such as stratum, the interference etc. of other electromagnetism, therefore, after obtaining altering spray reference point, require over and examine further with actual oil field, namely can confirm that whether this second test point 40 is for altering specking.Can judge rapidly whether tested oil well alters spray by scheme provided by the invention, and energy is Cuan Pen place, status quickly, it is greatly shortened detection time and testing cost, improves the detection efficiency of staff, it is possible to containment in time is by altering the massive losses that spray crack is brought.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (10)
1. spray detection method is altered on an earth's surface, it is characterised in that described earth's surface is altered spray detection method and included:
Step one, sets up current field according to tested oil well, and described tested oil well is carried out potentiometric detection, obtain the initial potential field data of tested oil well；
Step 2, injects steam in described tested oil well；
Step 3, detects the current potential of the described tested oil well injecting steam, obtains the potential fields data after injecting steam；
Step 4, by the potential fields data after the initial potential field data of relatively described tested oil well and described injection steam, it is judged that whether described tested oil well alters spray.
2. spray detection method is altered on earth's surface according to claim 1, it is characterised in that described step one includes:
Using described tested oil well as power supply positive pole oil well, choose another oil well as power supply negative pole oil well, make electric current flow to described power supply negative pole oil well by described power supply positive pole oil well and form described current field；
By testing described tested oil well current potential in described current field, obtain the initial potential field data of described tested oil well.
3. spray detection method is altered on earth's surface according to claim 2, it is characterised in that described obtain the initial potential field data of described tested oil well by testing described tested oil well current potential in described current field, including:
In the pre-position away from described tested oil well, the first test point is set, multiple second test point is set with described tested oil well for the toroid in the center of circle, by detecting the current potential between described first test point and each described second test point, obtain the potential fields data of described tested oil well.
4. spray detection method is altered on earth's surface according to claim 3, it is characterised in that described step 4 includes:
The initial potential field data of described tested oil well includes the initial potential gradient magnitude between described first test point and each described second test point；
Potential fields data after described injection steam include the change electric potential gradient amplitude between described first test point and each described second test point；
Difference by relatively described initial potential gradient magnitude with described change electric potential gradient amplitude, it is judged that whether described tested oil well alters spray.
5. spray detection method is altered on earth's surface according to claim 4, it is characterised in that described initial potential gradient magnitude and described change electric potential gradient amplitude are obtained by electromagnetic measurement instrument.
6. spray detection method is altered on earth's surface according to claim 5, it is characterised in that the described difference by relatively described initial potential gradient magnitude with described change electric potential gradient amplitude, it is judged that whether described tested oil well alters spray, including:
When described difference is more than or equal to 10 times of the resolution of described electromagnetic measurement instrument, the corresponding test point of described tested oil well is for altering spray reference point.
7. spray detection method is altered on earth's surface according to claim 2, it is characterised in that choose described power supply negative pole oil well in the position apart from described tested oil well 6 km to 10 kms.
8. spray detection method is altered on earth's surface according to claim 3, it is characterised in that described precalculated position is in the scope of described tested oil well 1 to 2 km.
9. spray detection method is altered on earth's surface according to claim 3, it is characterised in that arrange multiple concentric circular with described tested oil well for interval, the center of circle, described second test point is arranged on multiple described concentric circular.
10. spray detection method is altered on earth's surface according to claim 9, it is characterised in that the spacing between adjacent two described concentric circulars is 5 to 10 meters.
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| CN201410812091.9A CN105781520A (en) | 2014-12-22 | 2014-12-22 | Ground surface blowout detecting method |
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| CN201410812091.9A CN105781520A (en) | 2014-12-22 | 2014-12-22 | Ground surface blowout detecting method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115370334A (en) * | 2021-05-20 | 2022-11-22 | 中国石油天然气股份有限公司 | Steam injection adjusting method for reducing oil reservoir steam channeling |
| CN115370334B (en) * | 2021-05-20 | 2024-05-14 | 中国石油天然气股份有限公司 | Steam injection adjusting method for reducing oil reservoir steam channeling |
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| Publication number | Priority date | Publication date | Assignee | Title |
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