CN111022039A - Formation parameter detection method based on nano motor - Google Patents
Formation parameter detection method based on nano motor Download PDFInfo
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- CN111022039A CN111022039A CN201911217629.0A CN201911217629A CN111022039A CN 111022039 A CN111022039 A CN 111022039A CN 201911217629 A CN201911217629 A CN 201911217629A CN 111022039 A CN111022039 A CN 111022039A
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- nano motor
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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 relates to a detection method, in particular to a stratum parameter detection method based on a nano motor, wherein the nano motor is composed of a catalytic metal layer which is deposited on the inner side of a conical micro-nano motor shell and has a decomposition effect on hydrogen peroxide and an indicator group which is modified on the outer side, and the nano motor is mixed with deionized water to prepare a nano motor turbid liquid; hydrogen peroxide can be catalyzed and decomposed by a catalytic metal layer deposited on the inner surface of the nano motor to generate an oxygen concentration gradient to enable the nano motor to move, and in the process that the micro-nano motor moves in a detected stratum, an indicator group can generate irreversible physical or chemical transformation under the action of a medium environment in the stratum; and analyzing the extracted nano motor to obtain parameters such as temperature, pressure and the like of the detected stratum.
Description
Technical Field
The invention relates to a detection method, in particular to a formation parameter detection method based on a nano motor.
Background
In recent years, with the continuous development of stratum oil reservoir resources, the dominant oil field in China gradually enters the high-porosity block oil reservoir with low difficulty in exploitation in the middle and later periods of oil exploitation, no residual resources exist, the oil content of produced liquid is reduced year by year, unexplored oil gas resources of the existing old oil field are mainly concentrated in a low-permeability micropore or even a nano-pore stratum structure, and the difficulty in detection and exploitation is high. At present, because the stratum micro-nano pore reservoir environment has the characteristics of high temperature and high pressure, micro-nano scale, complex fluid components and the like, the prior art means cannot deeply penetrate into the stratum low-permeability micro-nano pore for sampling, so that the stratum micro-nano pore reservoir resource cannot be directly and accurately detected. In the prior art, the conventional reservoir exploration method is still adopted for the exploration of low-permeability micro-nano pore oil reservoir resources, the macroscopic well logging data and parameters such as bottom porosity, permeability and the like are used for evaluating, the precision is low, the defect is large, and the subsequent secondary development of old oil reservoirs is greatly limited.
The micro-nano motor is a power device with a formation parameter detection method between nano and micron scales based on the nano motor, and can convert light energy, electric energy, magnetic energy, chemical energy and the like in a medium environment into mechanical energy so as to realize specific motions such as straight lines, circles, spirals and the like. According to different driving energy sources, the micro-nano motor can be divided into a chemical driving micro-nano motor, an external physical field driving micro-nano motor and a hybrid driving micro-nano motor. The micro-nano motor can move in a narrow micro-nano space and complete complex tasks such as adsorption, capture, conveying and the like under control. The micro-nano motor is applied to stratum micro-nano pore oil reservoir sampling, can penetrate into a complicated stratum micro-nano pore to automatically move, generates physical or chemical response to stratum parameters through a self structure, can enter the stratum micro pore by virtue of self power and is extracted along with produced liquid, and the stratum parameters are extracted through analysis and detection of the extracted micro-nano motor.
Disclosure of Invention
The invention aims to provide a stratum parameter detection method based on a nano motor, which can effectively improve the precision of stratum parameter detection.
The purpose of the invention is realized by the following technical scheme:
a method for detecting formation parameters based on a nanomotor comprises the following steps:
the method comprises the following steps: the nanometer motor is composed of a catalytic metal layer which is deposited on the inner side of a conical micro-nano motor shell and has a decomposition effect on hydrogen peroxide and an indicator group which is modified on the outer side of the conical micro-nano motor shell, and the nanometer motor is mixed with deionized water to prepare a nanometer motor turbid liquid;
step two: mixing a hydrogen peroxide solution and the nano motor suspension, and injecting the mixture into the stratum of the oil well;
step three: the catalytic metal layer deposited on the inner surface of the nano motor catalyzes hydrogen peroxide to decompose, and oxygen concentration gradient is generated to enable the nano motor to move;
step four: when the nano motor moves in the detected stratum, an ultrasonic field effect is applied to the detected stratum, and under the ultrasonic effect, the micro-nano motor with an asymmetric structure moves along the edge of a stratum pore structure of the detected stratum to traverse the whole stratum pore;
step five: in the process that the micro-nano motor moves in the detected stratum, the indicator groups generate irreversible physical or chemical changes under the action of a medium environment in the stratum;
step six: and pumping the produced liquid containing the micro-nano motor out of the oil well, then placing the produced liquid in a centrifuge for centrifugal separation in an oscillation centrifugal mode, and analyzing the extracted nano motor so as to obtain the parameters of temperature, pressure and the like of the detected stratum.
As further optimization of the technical scheme, the invention provides a stratum parameter detection method based on a nano motor, wherein the diameter of a conical micro-nano motor shell is 500nm-40 mu m, and the length of the conical micro-nano motor shell is 2-10 mu m.
As further optimization of the technical scheme, the invention provides a stratum parameter detection method based on a nano motor, and the thickness of the catalytic metal layer is 10-50 nm.
As a further optimization of the technical scheme, the invention relates to a stratum parameter detection method based on a nano motor, wherein a catalytic metal layer is composed of catalytic metal.
As a further optimization of the technical scheme, the invention relates to a stratum parameter detection method based on a nano motor, and the catalytic metal is a metal or an alloy capable of catalyzing the decomposition of a hydrogen peroxide solution.
As a further optimization of the technical scheme, the invention relates to a formation parameter detection method based on a nano motor, wherein the indicator group is a substance sensitive to temperature, pressure, pH and other physicochemical characteristics.
The stratum parameter detection method based on the nano motor has the beneficial effects that:
according to the formation parameter detection method based on the nano motor, hydrogen peroxide can be catalyzed and decomposed through a catalytic metal layer deposited on the inner surface of the nano motor, an oxygen concentration gradient is generated to enable the nano motor to move, and in the process that the micro motor moves in a detected formation, an indicator group generates irreversible physical or chemical transformation under the action of a medium environment in the formation; and analyzing the extracted nano motor to obtain parameters such as temperature, pressure and the like of the detected stratum.
Drawings
The invention is described in further detail below with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic view of the construction of a nanomotor of the present invention;
FIG. 2 is a schematic structural view of the operating principle of the nanomotor of the present invention in a formation;
fig. 3 is a schematic diagram of the application of the invention in oil production engineering.
In the figure: a conical micro-nano motor shell 1; a catalytic metal layer 2; an indicator group 3; the formation rock 4; a micro-nano motor motion track 5; the formation pores 6; the formation to be probed 7; a water well 8; an oil well 9.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The first embodiment is as follows:
in the following, the present embodiment is described with reference to fig. 1 to 3, and a method for detecting formation parameters based on a nanomotor includes the following steps:
the method comprises the following steps: the nanometer motor is composed of a catalytic metal layer 2 which is deposited on the inner side of a conical micro-nano motor shell 1 and has a decomposition effect on hydrogen peroxide and an indicator group 3 which is modified on the outer side, and the nanometer motor is mixed with deionized water to prepare a nanometer motor suspension;
step two: mixing the hydrogen peroxide solution and the nano motor suspension, and injecting the mixture into the stratum of the oil well 9;
step three: the catalytic metal layer 2 deposited on the inner surface of the nano motor catalyzes the decomposition of hydrogen peroxide to generate an oxygen concentration gradient so as to enable the nano motor to move;
step four: when the nano motor moves in the detected stratum 7, an ultrasonic field effect is applied to the detected stratum 7, and under the ultrasonic effect, the micro-nano motor with an asymmetric structure moves along the edge of the structure of the stratum pore 6 of the detected stratum 7 to traverse the whole stratum pore 6; the ultrasonic waves are generated by ultrasonic transducers which can be lowered down the tubing of the well 9 to the formation at the corresponding depth. The ultrasonic waves propagate in all directions but only work most effectively in the same horizontal plane as the transducer. If an interdigital transducer IDT is used, the generated acoustic wave is surface ultrasound, propagating only along the plane of the interdigital.
Step five: in the process that the micro-nano motor moves in the detected stratum 7, the indicator group 3 generates irreversible physical or chemical change under the action of a medium environment in the stratum;
step six: and pumping the produced liquid containing the micro-nano motor out of the oil well, then placing the produced liquid in a centrifuge for centrifugal separation in an oscillation centrifugal mode, and analyzing the extracted nano motor so as to obtain the parameters of temperature, pressure and the like of the detected stratum.
The second embodiment is as follows:
the embodiment is described below with reference to fig. 1 to 3, and the embodiment further describes the first embodiment, wherein the conical micro-nano motor shell 1 has a diameter of 500nm to 40 μm and a length of 2 to 10 μm.
The third concrete implementation mode:
this embodiment mode will be described with reference to fig. 1 to 3, and this embodiment mode will further describe the second embodiment mode, in which the thickness of the catalytic metal layer 2 is 10 to 50 nm.
The fourth concrete implementation mode:
this embodiment mode will be described with reference to fig. 1 to 3, and this embodiment mode will further describe an embodiment mode three in which the catalytic metal layer 2 is composed of a catalytic metal.
The fifth concrete implementation mode:
the fourth embodiment will be further described with reference to fig. 1 to 3, wherein the catalytic metal is a metal or an alloy capable of catalyzing the decomposition of the hydrogen peroxide solution; for example, the catalytic metal may be gold or platinum.
The sixth specific implementation mode:
this embodiment is described below in conjunction with fig. 1-3, which further illustrates embodiment five, wherein the indicator group 3 is a substance that is sensitive to temperature, pressure, pH, and other physicochemical characteristics; for example, L-glutamic acid is heated at 160 ℃ to cause intramolecular dehydration. Such irreversible chemical changes sensitive to parameters in the formation may serve as an indicator reaction.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and that various changes, modifications, additions and substitutions which are within the spirit and scope of the present invention and which may be made by those skilled in the art are also within the scope of the present invention.
Claims (6)
1. A formation parameter detection method based on a nano motor is characterized in that: the method comprises the following steps:
the method comprises the following steps: the nanometer motor is composed of a catalytic metal layer (2) which is deposited on the inner side of a conical micro-nano motor shell (1) and has a decomposition effect on hydrogen peroxide and an indicator group (3) which is modified on the outer side, and the nanometer motor is mixed with deionized water to prepare a nanometer motor suspension;
step two: mixing a hydrogen peroxide solution and the nano motor suspension, and injecting the mixture into the stratum of the oil well (9);
step three: the catalytic metal layer (2) deposited on the inner surface of the nano motor catalyzes hydrogen peroxide to decompose, and oxygen concentration gradient is generated to enable the nano motor to move;
step four: when the nano motor moves in the detected stratum (7), an ultrasonic field effect is applied to the detected stratum (7), and under the ultrasonic effect, the micro-nano motor with an asymmetric structure moves along the edge of the structure of the stratum pore (6) of the detected stratum (7) to traverse the whole stratum pore (6);
step five: in the process that the micro-nano motor moves in a detected stratum (7), the indicator group (3) can generate irreversible physical or chemical change under the action of a medium environment in the stratum;
step six: and pumping the produced liquid containing the micro-nano motor out of the oil well, then placing the produced liquid in a centrifuge for centrifugal separation in an oscillation centrifugal mode, and analyzing the extracted nano motor so as to obtain the parameters of temperature, pressure and the like of the detected stratum.
2. The nanomotor-based formation parameter detection method of claim 1, wherein: the diameter of the conical micro-nano motor shell (1) is 500nm-40 mu m, and the length is 2-10 mu m.
3. The nanomotor-based formation parameter detection method of claim 1, wherein: the thickness of the catalytic metal layer (2) is 10-50 nm.
4. The nanomotor-based formation parameter detection method of claim 1, wherein: the catalytic metal layer (2) is composed of a catalytic metal.
5. The nanomotor-based formation parameter detection method of claim 4, wherein: the catalytic metal is a metal or alloy that can catalyze the decomposition of the hydrogen peroxide solution.
6. The nanomotor-based formation parameter detection method of claim 1, wherein: the indicator group (3) is a substance that is sensitive to temperature, pressure, pH and other physicochemical properties.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111550221A (en) * | 2020-05-12 | 2020-08-18 | 哈尔滨工业大学 | Oil field residual oil exploitation method based on micro-nano motor |
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