CN108397186B - Horizontal well temperature exciting water finding device and method - Google Patents
Horizontal well temperature exciting water finding device and method Download PDFInfo
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- CN108397186B CN108397186B CN201810095149.0A CN201810095149A CN108397186B CN 108397186 B CN108397186 B CN 108397186B CN 201810095149 A CN201810095149 A CN 201810095149A CN 108397186 B CN108397186 B CN 108397186B
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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
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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
- E21B47/07—Temperature
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Abstract
The invention belongs to the technical field of oil extraction in oil fields, and particularly relates to a horizontal well temperature exciting water finding device and method, which comprises a plug, a water finding unit, an oil pipe and a pumping device, wherein the upper half section of the oil pipe is a vertical oil pipe, the lower half section of the oil pipe is a horizontal oil pipe, the pumping device is connected in the vertical oil pipe, and the water finding unit and the plug are sequentially connected on the horizontal oil pipe from left to right; the method solves the problems of long water finding period and high construction strength in the existing method, further shortens the water finding period, improves the water finding efficiency, and reduces the labor intensity of field constructors.
Description
Technical Field
The invention belongs to the technical field of oil extraction in oil fields, and particularly relates to a horizontal well temperature exciting water exploration device and method.
Background
The Changqing oil field belongs to a typical 'three-low' oil reservoir, an oil well needs to be developed by fracturing and water injection supplementary energy, and along with the continuous progress of a reservoir fracturing modification technology, the development of a horizontal well becomes an effective means for improving the single-well yield of the oil well. However, under the influence of reservoir fracture development and water injection development, development contradictions that water content rises quickly and water wells increase are exposed in the development process, the normal productivity of the horizontal well is seriously influenced, and the premise is that the normal productivity of the oil well is recovered and the water outlet position is accurately found out, so that water exploration is needed to provide reliable basis for later water plugging measures.
At present, representative means for finding water in a horizontal well mainly comprise producing fluid profile well logging water finding, mechanical sectional production test water finding and the like. The horizontal well liquid production profile well logging water exploration technology is influenced by factors such as the starting displacement of a turbine flowmeter, horizontal section laminar flow of a horizontal well and the like, the flow of a horizontal well with low liquid amount (10 m 3/d) is difficult to identify, and the measurement error is large; the water exploration technology for the horizontal well by the sectional production test has the advantages that the water outlet layer section is determined by the sectional production and water content test, the requirement on the liquid production capacity of the horizontal well is low, but when the technology is applied to water exploration on a multi-section improved horizontal well, the water exploration period is long (30-40 days per well on average), and the field production requirement cannot be met. Therefore, the existing horizontal well water exploration technology has certain technical limitations, the field production requirement cannot be completely met, and the technical maturity and the adaptability need to be further improved.
Disclosure of Invention
The invention aims to solve the problems of long water finding period and high construction strength in the prior art.
Therefore, the invention provides a horizontal well temperature exciting water finding device which comprises a plug, a water finding unit, an oil pipe and a pumping device, wherein the upper half section of the oil pipe is a vertical oil pipe, the lower half section of the oil pipe is a horizontal oil pipe, the pumping device is connected in the vertical oil pipe, and the water finding unit and the plug are sequentially connected on the horizontal oil pipe from left to right.
The water detection unit comprises a temperature and pressure tester, an underground switch and a packer, and the packer, the underground switch and the temperature and pressure tester are sequentially connected from left to right.
The quantity of the water finding units is a plurality of and is connected to the horizontal oil pipe from left to right in sequence.
The temperature and pressure tester is an electronic temperature and pressure gauge, the underground switch is a storage type underground intelligent switch, the temperature measurement precision of the electronic temperature and pressure gauge is 0.01 ℃, and the pressure measurement precision is 0.1% FS.
A horizontal well temperature exciting water finding method comprises the following steps: the method comprises the following steps:
1) according to the number of fracturing sections of the horizontal well, the same number of temperature and pressure testers, underground switches and packers are matched, the temperature and pressure testers, the underground switches and the packers are conveyed to the underground along with oil pipes, the horizontal well is divided into production intervals by the packers, and each production interval is correspondingly provided with the temperature and pressure testers and the underground switches;
2) after a temperature and pressure tester is put into a preset position, closing the horizontal well to perform temperature and pressure recovery tests on each production interval, after initial temperature and pressure recovery test data are obtained, draining liquid through pumping equipment, and after the liquid level and the water content are stable, opening the horizontal well to take out the pumping equipment;
3) injecting cold water into the oil pipe to form temperature excitation, closing the horizontal well again to test the temperature and pressure recovery of each production interval, discharging liquid through pumping equipment (15) again after the test is finished, and taking out the pumping equipment after the liquid level and the water content are stable;
4) and after the test is finished, the water finding device is taken out, and the temperature and pressure data of the temperature and pressure tester are analyzed.
If the temperature change of the cold water injection stage of the oil outlet layer section in the step 4) is large, the temperature and pressure recovery after temperature excitation is abnormal with the primary test data; if the water-producing interval is the oil-producing interval, the temperature and pressure changes are smaller than those of the oil-producing interval.
The underground switch is in a switch state preset on the ground, is completely turned on when entering a horizontal well, is completely turned off when the horizontal well performs temperature and pressure recovery tests on each production interval, and is completely turned on when the temperature and pressure tester is started.
The invention has the beneficial effects that: according to the horizontal well temperature excitation water finding device and method, temperature and pressure recovery of each layer section of a horizontal well is tested by closing the well, and compared with temperature and pressure recovery of each layer section after temperature excitation, main water outlet layer sections of the horizontal section are comprehensively judged, and a basis is provided for later water plugging implementation. The method is convenient to construct and simple to operate, can effectively shorten the water finding period and improve the water finding efficiency while reducing the test cost.
Drawings
The present invention will be described in further detail below with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of the present invention.
Description of reference numerals: 1. plugging with a thread; 2. a temperature and pressure tester; 3. a downhole switch; 4. a packer; 5. an oil pipe; 6. a pumping device.
Detailed Description
Example 1:
as shown in fig. 1, the horizontal well temperature exciting water finding device comprises a plug 1, a water finding unit, an oil pipe 5 and a pumping device 6, wherein the upper half section of the oil pipe 5 is a vertical oil pipe, the lower half section of the oil pipe 5 is a horizontal oil pipe, the pumping device 6 is connected in the vertical oil pipe, and the water finding unit and the plug 1 are sequentially connected to the horizontal oil pipe from left to right; and (3) putting the water finding unit into a preset position through an oil pipe 5, closing each layer section of the horizontal well, recovering the test temperature and pressure, comparing the temperature with the temperature and pressure recovery value of each layer section after temperature excitation, comprehensively judging the main water outlet layer section of the horizontal section, and providing a basis for implementing water shutoff at the later stage. The method is convenient to construct and simple to operate, can effectively shorten the water finding period and improve the water finding efficiency while reducing the test cost.
The water exploration unit comprises a temperature and pressure tester 2, an underground switch 3 and a packer 4, wherein the packer 4, the underground switch 3 and the temperature and pressure tester 2 are sequentially connected from left to right; the temperature and pressure tester 2 is used for testing and acquiring measurement data of temperature and pressure, and the packer 4 is used for setting to clamp each production layer section, so that the structure is simple and the operation is convenient.
The quantity of the water finding units is a plurality of and is connected to the horizontal oil pipe from left to right in sequence. Can be adjusted according to the number of production intervals, and has strong adaptability and wide application range.
The temperature and pressure tester 2 is an electronic temperature and pressure gauge, the underground switch 3 is a storage type underground intelligent switch, the temperature measurement precision of the electronic temperature and pressure gauge is 0.01 ℃, and the pressure measurement precision is 0.1% FS. The measurement accuracy is high, and the error is little.
Example 2:
as shown in fig. 1, on the basis of example 1, a horizontal well temperature activation water finding method comprises the following steps: the method comprises the following steps:
1) according to the number of fracturing sections of the horizontal well, the same number of temperature and pressure testers 2, downhole switches 3 and packers 4 are matched, the temperature and pressure testers 2, the downhole switches 3 and the packers 4 are conveyed to the downhole along with oil pipes 5, the horizontal well is divided into production sections by the packers 4, and each production section is correspondingly provided with the temperature and pressure testers 2 and the downhole switches 3;
2) after the temperature and pressure tester 2 is put into a preset position, closing the horizontal well to perform temperature and pressure recovery tests on each production interval, after initial temperature and pressure recovery test data are obtained, discharging liquid through the swabbing equipment 6, and after the liquid level and the water content are stable, opening the horizontal well to lift the swabbing equipment 6 out;
3) injecting cold water into the oil pipe 5 to form temperature excitation, closing the horizontal well again to test the temperature and pressure recovery of each production interval, discharging liquid through the swabbing equipment (15) again after the test is finished, and taking out the swabbing equipment 6 after the liquid level and the water content are stable;
4) after the test is finished, the water finding device is taken out, and the temperature and pressure data of the temperature and pressure tester 2 are analyzed.
If the temperature change of the cold water injection stage of the oil outlet layer section in the step 4) is large, the temperature and pressure recovery after temperature excitation is abnormal with the primary test data; if the water-producing interval is the oil-producing interval, the temperature and pressure changes are smaller than those of the oil-producing interval. And comparing the temperature and pressure recovery changes of the sections before and after temperature excitation by replaying all the temperature and pressure gauge test data of the sections. If the temperature change of the cold water injection stage of the oil outlet layer section is large, the temperature and pressure recovery during the second pressure recovery are obviously abnormal with the first test; and if the interval is the water-producing interval, the temperature and pressure changes are smaller than those of the oil-producing interval, and finally the water-producing interval in the horizontal well shaft is judged.
The underground switch 3 is in a switch state preset on the ground, the underground switch 3 is completely opened when the horizontal well is put in, the underground switch 3 is completely closed when the horizontal well performs temperature and pressure recovery tests on each production interval, and the underground switch 3 is completely opened when the temperature and pressure tester 2 is lifted out. Firstly, presetting the on-off state time sequence of the underground switch 3 on the ground, and completing self-checking operation on the ground to ensure that all underground switches can be normally opened and closed; in the process of putting equipment in, the underground switch 3 is completely opened, so that the oil sleeve annulus is communicated with the oil pipe 5, and the construction safety is ensured; the underground switch 3 is completely closed during the test temperature and pressure recovery period, so that the test temperature and pressure recovery values are effective; in the process of starting the equipment, all the underground switches 3 are kept in an open state, so that the construction safety risk is reduced.
Example 3
As shown in fig. 1, on the basis of example 2, a horizontal well temperature activation water exploration device and method are described with reference to fig. 1 by taking one 4-section horizontal well in the long-term oil field as an example.
A horizontal well temperature exciting water finding device comprises a plug 1, 4 water finding units, an oil pipe 5 and a pumping device 6, wherein the upper half section of the oil pipe 5 is a vertical oil pipe, the lower half section of the oil pipe 5 is a horizontal oil pipe, the pumping device 6 is connected in the vertical oil pipe, and the 4 water finding units and the plug 1 are sequentially connected on the horizontal oil pipe from left to right; the water exploration unit comprises a temperature and pressure tester 2, an underground switch 3 and a packer 4, wherein the packer 4, the underground switch 3 and the temperature and pressure tester 2 are sequentially connected from left to right; the temperature and pressure tester 2 is an electronic temperature and pressure gauge, the underground switch 3 is a storage type underground intelligent switch, the temperature measurement precision of the electronic temperature and pressure gauge is 0.01 ℃, and the pressure measurement precision is 0.1% FS; the pumping equipment 6 is not inserted when the water detection device is taken off and the test period is carried out, and is inserted and operated only when pumping.
A horizontal well temperature exciting water exploration method comprises the following steps: firstly, presetting the on-off state time sequences of four underground switches 3 on the ground, and completing self-checking operation on the ground to ensure that all the underground switches 3 can be normally opened and closed; in the process of lowering the water finding device, the four underground 3 switches are all opened, so that the oil sleeve annulus is communicated with the oil pipe 5, and the construction safety is ensured; the underground switch 3 is completely closed during the test temperature and pressure recovery period, so that the test temperature and pressure recovery values are effective; in the process of taking up the water finding device, all the underground switches 3 are kept in an open state, so that the construction safety risk is reduced.
And (3) connecting the water finding device, then putting the water finding device into the well, putting 4 packers to preset positions for setting to clamp off all production layer sections, closing the well after setting for 5 days, and testing the initial temperature and pressure recovery of all perforation sections.
After the temperature and pressure recovery test is finished, discharging liquid with large discharge capacity through the swabbing equipment 6, continuously producing for 5-8 days, measuring the liquid production and water containing conditions on the ground, and taking out the swabbing equipment 6 after the liquid level and the water containing conditions are stable.
And injecting cold water into the oil pipe 5 in a large discharge amount to form temperature excitation, closing the well for testing for 5 days, and testing the temperature and pressure recovery of each interval again.
After the test is finished, large-discharge-amount liquid drainage is carried out again through the swabbing equipment 6, continuous production is carried out for 5-8 days, the liquid production and water content conditions are measured on the ground, and the swabbing equipment 6 is taken out after the liquid level and the water content are stable.
And after the test is finished, the water finding device is started, and the temperature and pressure recovery changes of all the sections before and after the temperature excitation are compared by replaying all the temperature and pressure meter test data of all the production sections. If the temperature change of the cold water injection stage of the oil outlet layer section is large, the temperature and pressure recovery during the second pressure recovery are obviously abnormal with the first test; and if the interval is the water-producing interval, the temperature and pressure changes are smaller than those of the oil-producing interval, and finally the water-producing interval in the horizontal well shaft is judged.
The invention further shortens the water finding period, improves the water finding efficiency, has high measurement precision, reduces the labor intensity of field constructors, is convenient to construct and simple to operate, and reduces the test cost by 40 percent.
The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the invention, which is intended to be covered by the claims and any design similar or equivalent to the scope of the invention.
Claims (6)
1. A horizontal well temperature exciting water finding method is characterized by comprising the following steps:
1) according to the number of fracturing sections of the horizontal well, the same number of temperature and pressure testers (2), downhole switches (3) and packers (4) are matched, the temperature and pressure testers (2), the downhole switches (3) and the packers (4) are conveyed to the underground along with an oil pipe (5), the packers (4) divide the horizontal well into production sections, and each production section is correspondingly provided with the temperature and pressure testers (2) and the downhole switches (3);
2) after the temperature and pressure tester (2) is placed at a preset position, closing the horizontal well to perform temperature and pressure recovery tests on each production interval, draining liquid through the pumping equipment (6) after initial temperature and pressure recovery test data are obtained, and opening the horizontal well to pump out the pumping equipment (6) after the liquid level and the water content are stable;
3) injecting cold water into the oil pipe (5) to form temperature excitation, closing the horizontal well again to test the temperature and pressure recovery of each production interval, discharging liquid through the swabbing equipment (6) again after the test is finished, and taking out the swabbing equipment (6) after the liquid level and the water content are stable;
4) after the test is finished, the water finding device is taken out, the temperature and pressure data of the temperature and pressure tester (2) are analyzed, and if the temperature change of the cold water injection stage of the oil production interval is large, the temperature and pressure recovery after temperature excitation is abnormal with the primary test data; if the water layer section is the oil layer section, the temperature and pressure changes are smaller than those of the oil layer section; the underground switch (3) is in a switch state preset on the ground, the underground switch (3) is completely opened when the underground switch is lowered into a horizontal well, the underground switch (3) is completely closed when the horizontal well performs temperature and pressure recovery tests of each production interval, and the underground switch (3) is completely opened when the temperature and pressure tester (2) is lifted out.
2. The horizontal well temperature stimulation water finding method according to claim 1, characterized in that: the method adopts a horizontal well temperature exciting water finding device to find water.
3. The horizontal well temperature stimulation water finding method according to claim 2, characterized in that: horizontal well temperature arouses looks for water installation and includes plug (1), looks for water unit, oil pipe (5), swabbing equipment (6), and the first section of oil pipe (5) is vertical oil pipe, and the second section of oil pipe (5) is horizontal oil pipe, and swabbing equipment (6) are connected in vertical oil pipe, and look for water unit and plug (1) and connect gradually on horizontal oil pipe from a left side to a right side, look for water unit includes warm-pressing tester (2).
4. The horizontal well temperature activated water finding method of claim 3, wherein: the water exploration unit further comprises an underground switch (3) and a packer (4), and the packer (4), the underground switch (3) and the temperature and pressure tester (2) are sequentially connected from left to right.
5. The horizontal well temperature stimulation water finding method according to claim 4, characterized in that: the quantity of the water finding units is a plurality of and is connected to the horizontal oil pipe from left to right in sequence.
6. The horizontal well temperature stimulation water finding method according to claim 5, characterized in that: the temperature and pressure tester (2) is an electronic temperature and pressure gauge, the underground switch (3) is a storage type underground intelligent switch, the temperature measurement precision of the electronic temperature and pressure gauge is 0.01 ℃, and the pressure measurement precision is 0.1% FS.
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