CN103244103B - Nano-magnetic-fluid-based hydraulic fracturing fracture real-time monitoring system and nano-magnetic-fluid-based hydraulic fracturing fracture real-timemonitoring method - Google Patents
Nano-magnetic-fluid-based hydraulic fracturing fracture real-time monitoring system and nano-magnetic-fluid-based hydraulic fracturing fracture real-timemonitoring method Download PDFInfo
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Abstract
The invention relates to a nano-magnetic-fluid-based hydraulic fracturing fracture real-time monitoring system and a nano-magnetic-fluid-based hydraulic fracturing fracture real-time monitoring method. The monitoring system comprises a proppant container, a fracturing fluid container, a magnetic fluid container, a fluid mixing container, a high-pressure pump set, a real-time data acquisition and processing center, a ground magnetometer, a proppant conveying pipeline, a fracturing fluid conveying pipeline, a magnetic fluid conveying pipeline, a first sand blending liquid conveying pipeline, a second sand blending liquid conveying pipeline, a ground magnetometer and real-time data acquisition and processing center communication line, a fracturing blender truck and a mixed fluid conveying pipeline; wherein the real-time data acquisition and processing center is connected with the ground magnetometer through the ground magnetometer and real-time data acquisition and processing center communication line; and the real-time data acquisition and processing center collects and saves metrical information of the ground magnetometer, and computes and displays hydraulic fracture distribution. The nano-magnetic-fluid-based hydraulic fracturing fracture real-time monitoring system and the nano-magnetic-fluid-based hydraulic fracturing fracture real-time monitoring method can reflect the real distribution state of hydraulic fracturing fractures effectively and monitor the extension process of the fractures during a fracturing process from the ground, a fracturing well and/or an adjoining well.
Description
Technical field
The invention belongs to petroleum gas, coal bed gas, geothermal exploitation field, particularly, relate to a kind of system and method, particularly a kind of hydraulically created fracture real-time monitoring system and monitoring method based on nanometer magnetofluid of hydraulically created fracture monitoring.
Background technology
Hydraulic fracturing technology, as important measures that improve reservoir permeability, improve production capacity, is widely applied in petroleum gas, coal bed gas, underground heat recovery process.Particularly, along with the exploitation of unconventional oil gas, underground heat, hydraulic fracturing technology will more and more highlight its critical role.
In fracturing process, generation and the development of monitoring hydraulic fracture are significant to Optimizing construction technique; And for refractured well, multistage fracturing well, the spread of grasping existing hydraulic fracture can be new fracturing technological design provides guidance.By the monitoring of hydraulic fracture, can evaluate the effect of increasing production of fractured well, the accuracy of check fracturing design software result.
At present, microseism monitoring has been widely used in fracturing process monitoring as the most effective a kind of hydraulic fracture monitoring technology, but because the data that gather are subject to the impact (as near reservoir stress discharges the noise producing) of the factors such as external environment, so the method also can only provide approximate hydraulic fracture spread.Other waterpower monitoring methods, as indirect methods such as ground inclination, radioactive tracer log, temperature loggings, all can not describe the spread state of hydraulic fracture well.In order to improve fracturing method for designing, to improve fracturing effect, accurately monitor hydraulic fracture spread particularly important.
Paleomagnetism technology is used to crack identification, and the method, by measuring the natural remanent magnetization in rock, is analyzed Characteristic of remnant paleomagnetization, magnetization history, with this, studies rock core Fracture orientation problem.In view of this, in fracturing process, by introduce nanometer magnetofluid in hydraulic fracture, after magnetizing by externally-applied magnetic field, form magnetic anomaly band, can be hydraulic fracture Real-Time Monitoring a kind of new technological means is provided.
Summary of the invention
In order to solve above technical problem, the invention provides a kind of hydraulically created fracture real-time monitoring system and monitoring method based on nanometer magnetofluid, effectively solved the monitoring problem of hydraulically created fracture spread in fracturing process.
For achieving the above object, the present invention adopts following proposal:
A hydraulically created fracture real-time monitoring system based on nanometer magnetofluid, comprising: sand bin, fracturing fluid container, magnetic fluid container, fluid mixer, high-pressure pump group, real-time data acquisition and processing center, ground magnetometer, proppant transport pipeline, fracturing fluid feed-line, magnetic fluid feed-line, the first mulling liquid feed-line, the second mulling liquid feed-line, ground magnetometer and real-time data acquisition and processing center communication line, fracturing blender truck, fluid-mixing feed-line; It is characterized in that:
Described fracturing fluid container is connected with fluid mixer by fracturing fluid feed-line, and magnetic fluid container is connected with fluid mixer by magnetic fluid feed-line;
Described sand bin is connected with fracturing blender truck by proppant transport pipeline; Fluid mixer is connected with fracturing blender truck by fluid-mixing feed-line;
Fracturing blender truck is connected with high-pressure pump group by the first mulling liquid feed-line, and high-pressure pump group is connected with the pit shaft of fractured well by the second mulling liquid feed-line;
Ground magnetometer is positioned on the ground centered by fractured well, real-time data acquisition and processing center are positioned on the ground, well site of fractured well, real-time data acquisition is connected with ground magnetometer with processing center communication line with real-time data acquisition by ground magnetometer with processing center, real-time data acquisition and processing center collection, the metrical information of preserving ground magnetometer calculating, demonstration hydraulic fracture spread.
Preferably, also comprise down-hole externally-applied magnetic field generator, described down-hole externally-applied magnetic field generator is arranged near the fractured well section of fractured well.
Preferably, also comprise fractured well magnetometer and/or offset well magnetometer, fractured well magnetometer is arranged near the fractured interval of fractured well pit shaft, and offset well magnetometer is arranged in the depth that offset well is corresponding with the fractured well fractured interval degree of depth; Real-time data acquisition is connected with fractured well magnetometer, offset well magnetometer with processing center communication line with real-time data acquisition with processing center communication line, offset well magnetometer with real-time data acquisition by fractured well magnetometer respectively with processing center; Real-time data acquisition and processing center collection, the metrical information of preserving fractured well magnetometer, offset well magnetometer calculating, demonstration hydraulic fracture spread.
Preferably, described ground magnetometer, fractured well magnetometer, offset well magnetic force are counted superconducting quantum interference device (SQUID).
Preferably, in sand bin, store pressure break proppant used; In fracturing fluid container, store pressure break fracturing fluid used; Storage nano magnetic fluid in magnetic fluid container; Nanometer magnetofluid is a kind of stable colloidal liquid, and the magnetic retention particle that is nanometer scale by diameter, base load liquid and surfactant three mix.
Preferably, fracturing fluid and nanometer magnetofluid according to a certain volume example enter after carrying out in fluid mixer evenly mixing and form and mix fracturing fluid, and described nanometer magnetofluid accounts for and mixes of the fracturing fluid volume ratio between 10% to 100%.
A hydraulically created fracture method of real-time based on nanometer magnetofluid, adopts above-mentioned real-time monitoring system, starts hydraulically created fracture monitoring after arranging the monitoring field of fractured well, it is characterized in that, concrete steps are as follows:
Step 1: arrange monitoring field
According to fractured well actual environment around, centered by fractured well, at one group of ground magnetometer of ground configuration, and ground magnetometer is connected with processing center with nanometer data acquisition with processing center communication line with real-time data acquisition by ground magnetometer;
Step 2: inject not containing the prepad fluid of nanometer magnetofluid in pit shaft, press off stratum at predetermined pressure break position and form hydraulic fracture;
Step 3: start computer data processing center, measure initial background magnetic field;
Step 4: nanometer magnetofluid and fracturing fluid are evenly mixed in fluid mixer, be then uniformly mixed to form mulling liquid with proppant and inject fractured well pit shaft in fracturing blender truck;
Step 5: be full of pit shaft but measure mulling liquid before not entering the hydraulic fracture that prepad fluid presses off at the mulling liquid that mixes nanometer magnetofluid and enter the background magnetic field before hydraulic fracture;
Step 6: be constantly injected in the hydraulic fracture of stratum along with mixing the mulling liquid of nanometer magnetofluid, hydraulic fracture constantly stretches out, and measures in real time the strengthening magnetic field that mulling liquid enters hydraulic fracture;
Step 7: the strengthening magnetic field and the measured mulling liquid of step 5 that enter hydraulic fracture according to the measured mulling liquid of step 6 enter the background magnetic field before hydraulic fracture, by real-time data acquisition and processing center, undertaken obtaining and the corresponding magnetic anomaly data in ground after data pretreatment, then by magnetic anomaly data inversion, go out fracture parameters, obtain in real time the hydraulic fracture spread in fracturing process;
Step 8: inject not containing the displacement fluid of nanometer magnetofluid, the even mulling liquid that mixes nanometer magnetofluid in fractured well pit shaft is replaced in hydraulic fracture completely, measure mulling liquid and all replace the strengthening magnetic field after hydraulic fracture;
Step 9: all replace strengthening magnetic field and the measured initial background magnetic field of step 3 after hydraulic fracture according to the measured mulling liquid of step 8, by real-time data acquisition and processing center, undertaken obtaining and the corresponding magnetic anomaly data in ground after data pretreatment, then by magnetic anomaly data inversion, go out fracture parameters, obtain mulling liquid and all replace the hydraulic fracture spread after hydraulic fracture.
Preferably, in step 1, be also included near the down-hole externally-applied magnetic field generator of arranging of fractured well fractured interval; After step 2, before step 3, also comprise the step that starts down-hole externally-applied magnetic field generator.
Preferably, also near fractured well fractured interval, arrange one group of fractured well magnetometer, and fractured well magnetometer is connected with processing center with real-time data acquisition with processing center communication line by real-time data acquisition; Or also in offset well, corresponding fractured well fractured interval depth is arranged one group of offset well magnetometer, and offset well magnetometer is connected with processing center with real-time data acquisition with processing center communication line with real-time data acquisition by offset well magnetometer;
Optimally, also near fractured well fractured interval, arrange one group of fractured well magnetometer, in offset well, corresponding fractured well fractured interval depth is arranged one group of offset well magnetometer, and fractured well magnetometer, offset well magnetometer are connected with processing center with real-time data acquisition with processing center communication line with real-time data acquisition with processing center communication line, offset well magnetometer with real-time data acquisition by fractured well magnetometer respectively.
Preferably, according to the measured mulling liquid of step 8, all replace strengthening magnetic field and the measured initial background magnetic field of step 3 after hydraulic fracture, by real-time data acquisition and processing center, undertaken obtaining and ground, fractured well, the corresponding magnetic anomaly data of offset well after data pretreatment, then by magnetic anomaly data inversion, go out fracture parameters, obtain mulling liquid and all replace the hydraulic fracture spread after hydraulic fracture.
With respect to prior art, advantage of the present invention is:
1, the present invention utilizes nanometer magnetofluid can effectively reflect the true spread state of hydraulically created fracture.
2, the present invention can be from ground, fractured well and/or offset well Real-Time Monitoring fracturing process the extension process in crack, quantitatively obtain the relevant parameters such as fracture height, width, length, trend.
3, by the spread of monitoring hydraulic fracture, the fracturing technological design that the present invention can be refracturing, multistage fracturing provides guidance.
Accompanying drawing explanation
Fig. 1 is the structural representation of the hydraulically created fracture real-time monitoring system based on nanometer magnetofluid.
In figure, 1, sand bin; 2, fracturing fluid container; 3, magnetic fluid container; 4, fluid mixer; 5, high-pressure pump group; 6, real-time data acquisition and processing center; 7, down-hole externally-applied magnetic field generator; 8, ground magnetometer; 9, fractured well magnetometer; 10, offset well magnetometer; 11, fractured well; 12, offset well; 13, hydraulic fracture; 14, ground; 15, proppant transport pipeline; 16, fracturing fluid feed-line; 17, magnetic fluid feed-line; 18, the first mulling liquid feed-line; 19, the second mulling liquid feed-line; 20, ground magnetometer and real-time data acquisition and processing center communication line; 21, fractured well magnetometer and real-time data acquisition and processing center communication line; 22, offset well magnetometer and real-time data acquisition and processing center communication line; 23, fracturing blender truck; 24, fluid-mixing feed-line.
The specific embodiment
As shown in Figure 1, hydraulically created fracture real-time monitoring system based on nanometer magnetofluid, comprise: sand bin 1, fracturing fluid container 2, magnetic fluid container 3, fluid mixer 4, high-pressure pump group 5, real-time data acquisition and processing center 6, down-hole externally-applied magnetic field generator 7, ground magnetometer 8, fractured well magnetometer 9, offset well magnetometer 10, proppant transport pipeline 15, fracturing fluid feed-line 16, magnetic fluid feed-line 17, the first mulling liquid feed-line 18, the second mulling liquid feed-line 19, ground magnetometer and real-time data acquisition and processing center communication line 20, fractured well magnetometer and real-time data acquisition and processing center communication line 21, offset well magnetometer and real-time data acquisition and processing center communication line 22, fracturing blender truck 23, fluid-mixing feed-line 24.
In sand bin 1, store pressure break proppant used.
In fracturing fluid container 2, store pressure break fracturing fluid used.
Storage nano magnetic fluid in magnetic fluid container 3.Nanometer magnetofluid is a kind of stable colloidal liquid, and the magnetic retention particle that is nanometer scale by diameter, base load liquid and surfactant three mix.Metallic particles or the oxide particle of magnetic retention particle D p-block element p in the periodic table of elements of nanometer scale form, and its composition includes but not limited to any combination of scandium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, zirconium, niobium, molybdenum, rhodium, palladium, yttrium, hafnium, tantalum, tungsten, platinum or above-mentioned element.The fluid properties such as the density of nanometer magnetofluid, viscosity are close with of the fracturing fluid fluid properties.
Described fracturing fluid container 2 is connected with fluid mixer 4 by fracturing fluid feed-line 16, and magnetic fluid container 3 is connected with fluid mixer 4 by magnetic fluid feed-line 17; Fracturing fluid and nanometer magnetofluid according to a certain volume example enter after carrying out in fluid mixer 4 evenly mixing and form and mix fracturing fluid, and described nanometer magnetofluid accounts for and mixes of the fracturing fluid volume ratio between 10% to 100%.
Described sand bin 1 is connected with fracturing blender truck 23 by proppant transport pipeline 15; Fluid mixer 4 is connected with fracturing blender truck 23 by fluid-mixing feed-line 24; Through fluid mixer 4, carry out even mixed fracturing fluid and enter fracturing blender truck 23 by fluid-mixing feed-line 24; The proppant storing in sand bin 1 enters fracturing blender truck 23 by proppant transport pipeline 15; Proppant and mixing fracturing fluid are uniformly mixed to form mulling liquid in fracturing blender truck 23.
Fracturing blender truck 23 is connected with high-pressure pump group 5 by the first mulling liquid feed-line 18, and high-pressure pump group 5 is connected with the pit shaft of fractured well 11 by the second mulling liquid feed-line 19; Described enters 5 superchargings of high-pressure pump group through the even mixed mulling liquid of fracturing blender truck 23 by the first mulling liquid feed-line 18, high pressure mulling liquid after supercharging enters in the pit shaft of fractured well 11 through the second mulling liquid feed-line 19, enters in the hydraulic fracture 13 that prepad fluid presses off under High Pressure.The hydraulic fracture 13 that described prepad fluid presses off is: when pressure break starts, by the prepad fluid injecting in fractured well 11 pit shafts, pressed off stratum and formed initial hydraulic fracture 13; Along with the continuous injection of follow-up load fluid, hydraulic fracture 13 constantly extends to earth formation deep, forms the larger hydraulic fracture of yardstick.
Described down-hole externally-applied magnetic field generator 7 is arranged near the fractured well section of fractured well 11, by external electrical field, produces externally-applied magnetic field, and the nanometer magnetofluid that injects hydraulic fracture 13 is magnetized and enhancing magnetic field intensity.
Ground magnetometer 8 is positioned on the ground 14 centered by fractured well 11, by a plurality of magnetometers, forms a magnetometer group, and ground magnetometer can arrange according to modes such as M shape, straight line, vertical line, matrix patterns, and ground magnetometer 8 changes from ground monitoring magnetic parameter; Fractured well magnetometer 9 is arranged near the fractured interval of fractured well 11 pit shafts, by a plurality of magnetometers, forms a magnetometer group, monitors magnetic parameter and change from 11 wells of fractured well; Offset well magnetometer 10 is arranged in the depth that offset well 12 is corresponding with the fractured well fractured interval degree of depth, by a plurality of magnetometers, forms a magnetometer group, monitors magnetic parameter and change from offset well 12.Real-time data acquisition and processing center 6 are positioned on the ground, well site 14 of fractured well 11, real-time data acquisition and processing center 6 are respectively by ground magnetometer and real-time data acquisition and processing center communication line 20, fractured well magnetometer and real-time data acquisition and processing center communication line 21, offset well magnetometer and real-time data acquisition and processing center communication line 22 and ground magnetometer 8, fractured well magnetometer 9, offset well magnetometer 10 is connected, real-time data acquisition and processing center 6 gather, preserve ground magnetometer 8, fractured well magnetometer 9, the metrical information of offset well magnetometer 10 is also calculated, show hydraulic fracture spread.
Background magnetic field before described ground magnetometer 8, fractured well magnetometer 9, the 10 detection fracturings of offset well magnetometer and the strengthening magnetic field after fracturing.Background magnetic field before fracturing refers to introduces the magnetic field recording before new nanometer magnetofluid in hydraulic fracture 13; Strengthening magnetic field after fracturing refers to introduces the magnetic field recording after new nanometer magnetofluid in hydraulic fracture 13.
Described ground magnetometer 8, fractured well magnetometer 9, offset well magnetometer 10 are superconducting quantum interference device (SQUID).
The background magnetic field of described detection and strengthening Magnetic Field are sent into real-time data acquisition and processing center 6 by ground magnetometer and real-time data acquisition and processing center communication line 20, fractured well magnetometer and real-time data acquisition and processing center communication line 21, offset well magnetometer and real-time data acquisition and processing center communication line 22.Described real-time data acquisition and processing center 6 are according to the background magnetic field gathering and strengthening Magnetic Field, by determining after noise reduction process, in hydraulic fracture 13, introduce the magnetic anomaly producing after nanometer magnetofluid, then according to the parameters such as magnetic susceptibility of magnetic anomaly parameter, nanometer magnetofluid, utilize magnetic anomaly inversion algorithm to obtain hydraulic fracture spread; This function can realize according to hydraulically created fracture magnetic anomaly of the prior art data acquisition and inversion interpretation software.
Hydraulically created fracture method of real-time based on nanometer magnetofluid, adopts above-mentioned real-time monitoring system, starts hydraulically created fracture monitoring after arranging the monitoring field of fractured well, and concrete steps are as follows:
Step 1: arrange monitoring field
Near fractured well 11 fractured intervals, arrange down-hole externally-applied magnetic field generator 7;
According to actual environment around fractured well 11, centered by fractured well 11, on ground, 14 arrange one group of ground magnetometer 8, and ground magnetometer 8 is connected with processing center 6 with nanometer data acquisition with processing center communication line 20 with real-time data acquisition by ground magnetometer;
Preferably, also near fractured well 11 fractured intervals, arrange one group of fractured well magnetometer 9, and fractured well magnetometer 9 is connected with processing center 6 with real-time data acquisition with processing center communication line 21 by real-time data acquisition.Or also in offset well 12, corresponding fractured well fractured interval depth is arranged one group of offset well magnetometer 10, and offset well magnetometer 10 is connected with processing center 6 with real-time data acquisition with processing center communication line 22 with real-time data acquisition by offset well magnetometer.
Optimally, also near fractured well 11 fractured intervals, arrange one group of fractured well magnetometer 9, in offset well 12, corresponding fractured well fractured interval depth is arranged one group of offset well magnetometer 10, and fractured well magnetometer 9, offset well magnetometer 10 are connected with processing center 6 with real-time data acquisition with processing center communication line 22 with real-time data acquisition with processing center communication line 21, offset well magnetometer with real-time data acquisition by fractured well magnetometer respectively.
Step 2: inject not containing the prepad fluid of nanometer magnetofluid in pit shaft 11, press off stratum at predetermined pressure break position and form hydraulic fracture 13;
Step 3: start down-hole externally-applied magnetic field generator 7;
Step 4: start computer data processing center 6, measure initial background magnetic field;
Step 5: nanometer magnetofluid and fracturing fluid are evenly mixed in fluid mixer 4, be then uniformly mixed to form mulling liquid with proppant and inject fractured well 11 pit shafts in fracturing blender truck 23;
Step 6: be full of pit shaft but measure mulling liquid before not entering the hydraulic fracture 13 that prepad fluid presses off at the mulling liquid that mixes nanometer magnetofluid and enter the background magnetic field before hydraulic fracture;
Step 7: be constantly injected in stratum hydraulic fracture 13 along with mixing the mulling liquid of nanometer magnetofluid, hydraulic fracture 13 constantly stretches out, and measures in real time the strengthening magnetic field that mulling liquid enters hydraulic fracture;
Step 8: the strengthening magnetic field and the measured mulling liquid of step 6 that enter hydraulic fracture according to the measured mulling liquid of step 7 enter the background magnetic field before hydraulic fracture, by real-time data acquisition and processing center 6, undertaken obtaining and ground 14, fractured well 11, the corresponding magnetic anomaly data of offset well 12 after data pretreatment, then by magnetic anomaly data inversion, go out fracture parameters, obtain in real time the hydraulic fracture spread in fracturing process;
Step 9: inject not containing the displacement fluid of nanometer magnetofluid, the even mulling liquid that mixes nanometer magnetofluid in fractured well 11 pit shafts is replaced in hydraulic fracture 13 completely, measure mulling liquid and all replace the strengthening magnetic field after hydraulic fracture;
Step 10: all replace strengthening magnetic field and the measured initial background magnetic field of step 4 after hydraulic fracture according to the measured mulling liquid of step 8, by real-time data acquisition and processing center 6, undertaken obtaining and ground 14, fractured well 11, the corresponding magnetic anomaly data of offset well 12 after data pretreatment, then by magnetic anomaly data inversion, go out fracture parameters, obtain mulling liquid and all replace the hydraulic fracture spread after hydraulic fracture.
Claims (9)
1. the hydraulically created fracture real-time monitoring system based on nanometer magnetofluid, comprising: communication line, fracturing blender truck, fluid-mixing feed-line between sand bin, fracturing fluid container, magnetic fluid container, fluid mixer, high-pressure pump group, real-time data acquisition and processing center, ground magnetometer, proppant transport pipeline, fracturing fluid feed-line, magnetic fluid feed-line, the first mulling liquid feed-line, the second mulling liquid feed-line, ground magnetometer and real-time data acquisition and processing center; It is characterized in that:
Described fracturing fluid container is connected with fluid mixer by fracturing fluid feed-line, and magnetic fluid container is connected with fluid mixer by magnetic fluid feed-line;
Described sand bin is connected with fracturing blender truck by proppant transport pipeline; Fluid mixer is connected with fracturing blender truck by fluid-mixing feed-line;
Fracturing blender truck is connected with high-pressure pump group by the first mulling liquid feed-line, and high-pressure pump group is connected with the pit shaft of fractured well by the second mulling liquid feed-line;
Fracturing fluid and nanometer magnetofluid according to a certain volume example enter after carrying out in fluid mixer evenly mixing and form and mix fracturing fluid, and described nanometer magnetofluid accounts for and mixes of the fracturing fluid volume ratio between 10% to 100%;
Ground magnetometer is positioned on the ground centered by fractured well, real-time data acquisition and processing center are positioned on the ground, well site of fractured well, real-time data acquisition is connected with ground magnetometer with the communication line between processing center with real-time data acquisition by ground magnetometer with processing center, real-time data acquisition and processing center collection, the metrical information of preserving ground magnetometer calculating, demonstration hydraulic fracture spread.
2. the hydraulically created fracture real-time monitoring system based on nanometer magnetofluid according to claim 1, is characterized in that: also comprise down-hole externally-applied magnetic field generator, described down-hole externally-applied magnetic field generator is arranged near the fractured well section of fractured well.
3. the hydraulically created fracture real-time monitoring system based on nanometer magnetofluid according to claim 2, it is characterized in that: also comprise fractured well magnetometer and/or offset well magnetometer, fractured well magnetometer is arranged near the fractured interval of fractured well pit shaft, and offset well magnetometer is arranged in the depth that offset well is corresponding with the fractured well fractured interval degree of depth; Real-time data acquisition is connected with fractured well magnetometer, offset well magnetometer with the communication line between processing center with real-time data acquisition with communication line, offset well magnetometer between processing center with real-time data acquisition by fractured well magnetometer respectively with processing center; Real-time data acquisition and processing center collection, the metrical information of preserving fractured well magnetometer, offset well magnetometer calculating, demonstration hydraulic fracture spread.
4. the hydraulically created fracture real-time monitoring system based on nanometer magnetofluid according to claim 3, is characterized in that: described ground magnetometer, fractured well magnetometer, offset well magnetic force are counted superconducting quantum interference device (SQUID).
5. the hydraulically created fracture real-time monitoring system based on nanometer magnetofluid according to claim 4, is characterized in that: in sand bin, store pressure break proppant used; In fracturing fluid container, store pressure break fracturing fluid used; Storage nano magnetic fluid in magnetic fluid container; Nanometer magnetofluid is a kind of stable colloidal liquid, and the magnetic retention particle that is nanometer scale by diameter, base load liquid and surfactant three mix.
6. the hydraulically created fracture method of real-time based on nanometer magnetofluid, adopts the described real-time monitoring system of one of claim 1-5, starts hydraulically created fracture monitoring after arranging the monitoring field of fractured well, it is characterized in that, concrete steps are as follows:
Step 1: arrange monitoring field
According to fractured well actual environment around, centered by fractured well, at one group of ground magnetometer of ground configuration, and ground magnetometer is connected with processing center with real-time data acquisition with the communication line between processing center with real-time data acquisition by ground magnetometer;
Step 2: inject not containing the prepad fluid of nanometer magnetofluid in pit shaft, press off stratum at predetermined pressure break position and form hydraulic fracture;
Step 3: start real-time data acquisition and processing center, measure initial background magnetic field;
Step 4: nanometer magnetofluid and fracturing fluid are evenly mixed in fluid mixer, be then uniformly mixed to form mulling liquid with proppant and inject fractured well pit shaft in fracturing blender truck;
Step 5: be full of pit shaft but measure mulling liquid before not entering the hydraulic fracture that prepad fluid presses off at the mulling liquid that mixes nanometer magnetofluid and enter the background magnetic field before hydraulic fracture;
Step 6: be constantly injected in the hydraulic fracture of stratum along with mixing the mulling liquid of nanometer magnetofluid, hydraulic fracture constantly stretches out, and measures in real time the strengthening magnetic field that mulling liquid enters hydraulic fracture;
Step 7: the strengthening magnetic field and the measured mulling liquid of step 5 that enter hydraulic fracture according to the measured mulling liquid of step 6 enter the background magnetic field before hydraulic fracture, by real-time data acquisition and processing center, undertaken obtaining and the corresponding magnetic anomaly data in ground after data pretreatment, then by magnetic anomaly data inversion, go out fracture parameters, obtain in real time the hydraulic fracture spread in fracturing process;
Step 8: inject not containing the displacement fluid of nanometer magnetofluid, the even mulling liquid that mixes nanometer magnetofluid in fractured well pit shaft is replaced in hydraulic fracture completely, measure mulling liquid and all replace the strengthening magnetic field after hydraulic fracture;
Step 9: all replace strengthening magnetic field and the measured initial background magnetic field of step 3 after hydraulic fracture according to the measured mulling liquid of step 8, by real-time data acquisition and processing center, undertaken obtaining and the corresponding magnetic anomaly data in ground after data pretreatment, then by magnetic anomaly data inversion, go out fracture parameters, obtain mulling liquid and all replace the hydraulic fracture spread after hydraulic fracture.
7. the hydraulically created fracture method of real-time based on nanometer magnetofluid according to claim 6, is characterized in that: in step 1, be also included near the down-hole externally-applied magnetic field generator of arranging of fractured well fractured interval; After step 2, before step 3, also comprise the step that starts down-hole externally-applied magnetic field generator.
8. the hydraulically created fracture method of real-time based on nanometer magnetofluid according to claim 7, is characterized in that:
Near fractured well fractured interval, arrange one group of fractured well magnetometer, and fractured well magnetometer is connected with processing center with real-time data acquisition with the communication line between processing center by real-time data acquisition; Or also in offset well, corresponding fractured well fractured interval depth is arranged one group of offset well magnetometer, and offset well magnetometer is connected with processing center with real-time data acquisition with the communication line between processing center with real-time data acquisition by offset well magnetometer;
Near fractured well fractured interval, arrange one group of fractured well magnetometer, in offset well, corresponding fractured well fractured interval depth is arranged one group of offset well magnetometer, and fractured well magnetometer, offset well magnetometer are connected with processing center with real-time data acquisition with the communication line between processing center with real-time data acquisition with communication line, offset well magnetometer between processing center with real-time data acquisition by fractured well magnetometer respectively.
9. the hydraulically created fracture method of real-time based on nanometer magnetofluid according to claim 8, is characterized in that:
According to the measured mulling liquid of step 8, all replace strengthening magnetic field and the measured initial background magnetic field of step 3 after hydraulic fracture, by real-time data acquisition and processing center, undertaken obtaining and ground, fractured well, the corresponding magnetic anomaly data of offset well after data pretreatment, then by magnetic anomaly data inversion, go out fracture parameters, obtain mulling liquid and all replace the hydraulic fracture spread after hydraulic fracture.
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| EP1797281B1 (en) * | 2004-10-04 | 2013-12-11 | Momentive Specialty Chemicals Research Belgium | Method of estimating fracture geometry, compositions and articles used for the same |
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| CN102155209B (en) * | 2011-01-21 | 2014-01-01 | 中国石油大学(北京) | Method for fracturing stratum by acidity viscoelastic fluid |
| CN202202856U (en) * | 2011-07-12 | 2012-04-25 | 原子高科股份有限公司 | Radioactive tracing sand injecting device |
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