CN109424361B - One-trip layered oil testing pipe column - Google Patents
One-trip layered oil testing pipe column Download PDFInfo
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- CN109424361B CN109424361B CN201710736782.9A CN201710736782A CN109424361B CN 109424361 B CN109424361 B CN 109424361B CN 201710736782 A CN201710736782 A CN 201710736782A CN 109424361 B CN109424361 B CN 109424361B
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- oil
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- circulation valve
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
- E21B49/087—Well testing, e.g. testing for reservoir productivity or formation parameters
- E21B49/088—Well testing, e.g. testing for reservoir productivity or formation parameters combined with sampling
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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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
- E21B43/116—Gun or shaped-charge perforators
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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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/14—Obtaining from a multiple-zone well
Abstract
The invention discloses a one-trip layering oil testing pipe column, and belongs to the field of oil and gas field exploitation. The tubular column comprises from top to bottom in sequence: the device comprises a first oil pipe, a positioning short section, a second oil pipe, a first ignition head, a first perforating gun, a sieve pipe, an oil pipe short section, a packer, a pressure control switch, a third oil pipe, a second ignition head, a time delay device, a second perforating gun and a pressure gauge support cylinder; when testing oil of an oil and gas well, the pipe column is lowered into a preset position through the positioning short joint, the first reservoir stratum and the second reservoir stratum are isolated through the packer, and after the second reservoir stratum is perforated through the second ignition head, the delay device and the second perforating gun, sampling is carried out on the well mouth of the oil and gas well through the pressure control switch and the formation pressure of the second reservoir stratum, so that the production data of the second reservoir stratum are obtained; and closing the voltage-controlled switch, and sampling at the well mouth of the oil-gas well through the screen pipe and the formation pressure of the first reservoir after the first reservoir is perforated through the first ignition head and the first perforating gun so as to obtain the production data of the first reservoir.
Description
Technical Field
The invention relates to the field of oil and gas field exploitation, in particular to a one-trip layered oil testing tubular column.
Background
In the process of exploiting the oil and gas field, the liquid producing capacity of each reservoir is different due to different liquid producing types and different reservoir pressures of each reservoir in the oil and gas well. Therefore, in order to improve the recovery efficiency of the oil and gas well, after the oil and gas well is fixed, each reservoir layer penetrated by the oil and gas well can be perforated, and each reservoir layer is sampled by pulling out the oil testing pipe column for many times so as to obtain the production data of each reservoir layer, such as the productivity, the liquidity, the pressure recovery curve and the like of the reservoir layer. However, in order to avoid the pollution of the test tubing string to each reservoir in the oil and gas well and reduce the cost of oil and gas production, a one-trip layered test tubing string is needed.
In the related art, as shown in fig. 1, the test string for each reservoir of the oil and gas well comprises an inverted cone 1, a seating nipple 2, a compression type packer 3 which is supported by a slip and is hydraulically seated, a first sliding sleeve 4 which can be repeatedly opened and closed, a first packer 5, a second sliding sleeve 6 which can be repeatedly opened and closed, a second packer 7, a retrievable check valve plug 8, a pressure transfer sand supporting leather cup 9 and a hydraulic jet pump 10 which are sequentially arranged from bottom to top, and all the components are connected through an oil pipe 11. In the process of testing oil in the oil and gas well, the compression type packer, the first packer and the second packer which are supported by the slips and are hydraulically set are used for packing each reservoir in the oil and gas well, so that the communication between each reservoir and an oil pipe is respectively realized through the inverted cone, the first sliding sleeve capable of being repeatedly opened and closed and the second sliding sleeve capable of being repeatedly opened and closed, and then the production data of each reservoir in the oil and gas well is tested through the hydraulic jet pump and the throwing and fishing type check valve blanking plug.
However, before testing each reservoir of the oil and gas well by using the testing string, a perforating string needs to be set in advance in the oil and gas well to penetrate each reservoir of the oil and gas well, then the perforating string is started, and the testing string is set, so that the testing of each reservoir of the oil and gas well is realized. Therefore, when the recovery ratio of the oil and gas well is improved, the production data of each reservoir in the oil and gas well is obtained through the test pipe column, the pollution to each reservoir in the oil and gas well cannot be avoided, and the oil and gas exploitation cost is reduced.
Disclosure of Invention
In order to solve the problem of pollution to each reservoir of an oil-gas well in the related art, the embodiment of the invention provides a one-pass layering oil testing pipe column. The technical scheme is as follows:
on the one hand, a formula layering oil test tubular column is provided, the tubular column includes from last down in proper order: the device comprises a first oil pipe, a positioning short section, a second oil pipe, a first ignition head, a first perforating gun, a sieve pipe, an oil pipe short section, a packer, a pressure control switch, a third oil pipe, a second ignition head, a time delay device, a second perforating gun and a pressure gauge support cylinder, wherein all the parts are connected; wherein, at least one pressure gauge is arranged in the pressure gauge supporting cylinder;
when oil testing is carried out on an oil and gas well, the pipe column is lowered into a preset position through the positioning short joint, a first reservoir stratum and a second reservoir stratum located below the first reservoir stratum are isolated through the packer, and after the second reservoir stratum is perforated through the second ignition head, the time delay device and the second perforating gun, sampling is carried out on a well mouth of the oil and gas well through the pressure control switch and the formation pressure of the second reservoir stratum so as to obtain production data of the second reservoir stratum; and closing the pressure control switch, and sampling at the wellhead of the oil and gas well through the screen pipe and the formation pressure of the first reservoir after the first reservoir is perforated through the first ignition head and the first perforating gun so as to obtain the production data of the first reservoir.
Optionally, the tubing string further comprises a circulation valve located between the second tubing and the first firing head, the circulation valve connected to the first firing head by a fourth tubing.
Optionally, the circulation valve is a slip circulation valve or a pressure controlled circulation valve.
Optionally, when the circulation valve is a slip circulation valve, the tubular string further comprises a pressure controlled circulation valve located between the slip circulation valve and the fourth tubular.
Optionally, when the circulation valve is a pressure controlled circulation valve, the tubular string further comprises a slip circulation valve located between the second tubing and the pressure controlled circulation valve.
Optionally, the tubular string further comprises a sand pulling cup located between the first perforating gun and the screen.
Optionally, the first ignition head is a rod throwing ignition head, and the second ignition head is a hydraulic ignition head.
Optionally, the tubular string further comprises a shock absorber, the shock absorber being located between the pressure control switch and the third oil conduit.
The technical scheme provided by the embodiment of the invention has the following beneficial effects: in the embodiment of the invention, when oil testing and sampling are carried out on an oil-gas well, a pressure gauge support cylinder, a second perforating gun, a time delay device, a second ignition head, a third oil pipe, a pressure control switch, a packer, an oil pipe short section, a first perforating gun, a sieve pipe, a first ignition head, a second oil pipe, a positioning short section and a first oil pipe are sequentially arranged in the oil-gas well, and all the parts are connected to form a pipe column. And then adjusting the position of the tubular column through the positioning short joint, ensuring that the first perforating gun corresponds to the first reservoir and the second perforating gun corresponds to the second reservoir, isolating the first reservoir from the second reservoir through a packer, perforating the second reservoir through a second ignition head, a delay device and the second perforating gun, and allowing production liquid in the reservoir to flow to a well mouth along a pressure control switch under the action of the formation pressure of the second reservoir after perforation is completed, so that sampling is performed at the well mouth of the oil and gas well to obtain the production data of the second reservoir. Afterwards, the voltage-controlled switch is closed, the first reservoir is perforated through the first ignition head and the first perforating gun, after the perforation is completed, the produced liquid of the first reservoir flows to the well head along the sieve tube under the action of the formation pressure of the first reservoir, so that the well head of the oil-gas well is sampled, the production data of the first reservoir is obtained, the sampling of the test oil of each reservoir in the oil-gas well is realized, the pollution to each reservoir caused by the re-pulling of the tubular column after the perforation of each reservoir in the oil-gas well is completed is avoided, and the production cost of the oil-gas well is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a test string provided in the related art;
FIG. 2 is a schematic structural diagram of a first one-pass type layered test tubing string according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a second one-pass type layered oil testing string according to an embodiment of the present invention.
Reference numerals:
the related technology comprises the following steps: 1: back tapering; 2: a landing nipple; 3: a compression packer which is provided with a slip support and is hydraulically set; 4: a first repeatedly openable and closable slide sleeve; 5: a first packer; 6: the second sliding sleeve can be opened and closed repeatedly; 7: a second packer; 8: a retrievable check valve blanking plug; 9: transmitting pressure to hold the sand cup; 10: a hydraulic jet pump; 11: and (4) an oil pipe.
The embodiment of the invention comprises the following steps: 1: a first oil pipe; 2: positioning the short section; 3: a second oil pipe; 4: a first ignition head; 5: a first perforating gun; 6: a screen pipe; 7: an oil pipe nipple; 8: a packer; 9: a voltage controlled switch; 10: a third oil pipe; 11: a second firing head; 12: a time delay device; 13: a second perforating gun; 14: a pressure gauge support cylinder; 15: a shock absorber; 16: dragging a sand leather cup; 17: a circulation valve; 18: and a fourth oil pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 2 is a schematic structural diagram of a one-trip type layered oil testing string according to an embodiment of the present invention. Referring to fig. 2, the pipe column comprises from top to bottom in sequence: the device comprises a first oil pipe 1, a positioning short section 2, a second oil pipe 3, a first ignition head 4, a first perforating gun 5, a sieve pipe 6, an oil pipe short section 7, a packer 8, a pressure control switch 9, a third oil pipe 10, a second ignition head 11, a time delay device 12, a second perforating gun 13 and a pressure gauge support cylinder 14 which are connected with one another; wherein, at least one pressure gauge is arranged in the pressure gauge supporting cylinder;
when testing oil of an oil and gas well, a pipe column is lowered into a preset position through a positioning short joint 22, a first reservoir and a second reservoir located below the first reservoir are isolated through a packer 8, and after the second reservoir is perforated through a second ignition head 11, a delay device 12 and a second perforating gun 13, sampling is carried out at a well mouth of the oil and gas well through a pressure control switch 9 and the formation pressure of the second reservoir so as to obtain the production data of the second reservoir; and closing the pressure control switch 9, and sampling at the wellhead of the oil and gas well through the sieve tube 6 and the formation pressure of the first reservoir after the first reservoir is perforated through the first ignition head 4 and the first perforating gun 5 so as to obtain the production data of the first reservoir.
The positioning nipple 2 refers to an oil pipe nipple which is not subjected to magnetic treatment, and the positioning nipple 2 can be matched with the second oil pipe 3 for use and is used for determining the position of the pipe column in the oil-gas well. In a possible implementation manner, gamma rays are emitted to the oil and gas well to determine the length of each oil pipe, so that the position of the positioning nipple 2 is determined based on the length of each oil pipe, and the position of the pipe column in the oil and gas well is further determined. Of course, the position of the tubular string in the oil and gas well may be determined in other ways, which is not limited in the embodiment of the present invention. The second oil pipe 3 may be composed of 3 oil pipes or 4 oil pipes.
The packer 8 is used for isolating the first reservoir and the second reservoir which the oil and gas well passes through, the packer 8 can be a compression packer, and of course, other types of packers can be adopted as long as the isolation between the first reservoir and the second reservoir can be realized, for example, an expansion packer or a self-sealing packer and the like.
The second ignition head 11 is used for providing a fire source for the second perforating gun 13, so that the second perforating gun 13 can be started to penetrate through the second reservoir layer after the second ignition head 11 is ignited successfully, before the second perforating gun 13 penetrates through the second reservoir layer, the pressure control switch 9 is opened within the preset delay time of the delay device 12, so that produced liquid of the second reservoir layer after penetrating through the second reservoir layer can enter the pipe column through the pressure control switch 9 under the action of the ground pressure, and flow to the wellhead of the oil and gas well, and the test oil sampling of the produced liquid of the second reservoir layer is realized. The pressure control switch 9 can be opened or closed cyclically under the control of the pressure signal, so that the pipe column is communicated with or disconnected from the second reservoir. The preset delay time may be preset based on a time used for turning on the voltage-controlled switch 9, for example, the preset delay time may be 8 minutes, 10 minutes, or 12 minutes, and the embodiment of the present invention does not limit this.
The first ignition head 4 is used for providing a fire source for the first perforating gun 5, so that the first perforating gun 5 can be started to shoot through a first reservoir after the first ignition head 4 is ignited successfully, and produced liquid of the first reservoir enters the pipe column through the sieve holes in the sieve pipe 6 under the action of the ground pressure and flows to the wellhead of the oil-gas well, so that the oil testing sampling of the produced liquid of the first reservoir is realized.
At least one pressure gauge within the pressure gauge cartridge 14 is used to detect the bottom hole pressure and bottom hole temperature of the well.
It should be noted that the first ignition head 4 and the second ignition head 11 are both shockproof ignition heads, and when a pressure value detected by the pressure-controlled switch 9 reaches the working pressure of the pressure-controlled switch 9 and drops from the working pressure of the pressure-controlled switch 9, the pressure-controlled switch 9 can be turned on or turned off. Therefore, in the embodiment of the present invention, the annulus between the pipe string and the casing can be pressurized from the wellhead, and when the pressure value at the pressure control switch 9 reaches the working pressure of the pressure control switch 9, the pressure in the annulus is relieved, so as to open or close the pressure control switch 9.
In the embodiment of the invention, when oil testing and sampling are carried out on an oil-gas well, a pressure gauge support cylinder 14, a second perforating gun 13, a time delay device 12, a second ignition head 11, a third oil pipe 10, a pressure control switch 9, a packer 8, an oil pipe short section 7, a sieve pipe 6, a first perforating gun 5, a first ignition head 4, a second oil pipe 3, a positioning short section 2 and a first oil pipe 1 are sequentially arranged in the oil-gas well, and all the components are connected to form a pipe column. Then, the position of the pipe column is adjusted through the positioning short joint 2, the first perforating gun 6 is ensured to correspond to a first reservoir stratum, the second perforating gun 13 corresponds to a second reservoir stratum, the first reservoir stratum and the second reservoir stratum are isolated through a packer 8, the second reservoir stratum is perforated through a second ignition head 11, a delay device 12 and the second perforating gun 13, and after perforation is completed, liquid production in the reservoir stratum flows to a well mouth along a pressure control switch 9 under the action of the formation pressure of the second reservoir stratum, so that sampling is carried out on the well mouth of the oil-gas well to obtain the production data of the second reservoir stratum; and closing the voltage-controlled switch 9, perforating the first reservoir through the first ignition head 4 and the first perforating gun 6, and allowing the produced liquid of the first reservoir to flow to the well head along the sieve tube 5 under the action of the formation pressure of the first reservoir after perforation is finished, so that sampling is performed at the well head of the oil-gas well to obtain the production data of the first reservoir, and thus the sampling of the test oil of each reservoir in the oil-gas well is realized.
In order to avoid starting the first ignition head 4 while starting the second ignition head 11, so that the first perforation gun 5 and the second perforation gun 13 simultaneously perforate the first reservoir layer and the second reservoir layer, the first ignition head 4 may be a rod throwing ignition head, and the second ignition head 11 may be a hydraulic ignition head, of course, the first ignition head 4 and the second ignition head 11 may also be other types of ignition heads, as long as the first ignition head 4 and the second ignition head 11 can be started at different times. For example, the first ignition head 4 may be a hydraulic ignition head, and the second ignition head 11 may be a rod throwing ignition head; or the first ignition head 4 and the second ignition head 11 may be hydraulic ignition heads with different pressure control values, and the pressure control value of the second ignition head 11 is smaller than that of the first ignition head 4.
After the second firing head 11 is started, during the perforation of the second reservoir by the second perforating gun 13, a large shock may be generated, and particularly, after the perforation of the second reservoir by the second perforating gun 13 is completed, the first perforating gun 5 may be deviated from the first reservoir, so, referring to fig. 3, the string may further include a shock absorber 15, and the shock absorber 15 is located between the pressure control switch 9 and the third tubing 10, and the shock caused during the perforation by the second perforating gun is reduced by the shock absorbing function of the shock absorber 15. Of course, in the process of putting the string in the oil-gas well, the water cushion can be added into the string every time the number of oil pipes is preset, so that the vibration caused by the second perforating gun 13 is buffered through the water column in the string, and the great influence is avoided. In practical applications, the shock caused by the second perforating gun 13 can be reduced by installing the shock absorber 15 and performing a water cushion operation in the string, which is not particularly limited by the embodiment of the present invention.
Wherein, the preset number can be 3, 4 or 5. After the operation of adding water pad in this tubular column, can also carry out pressure signal's transmission through the water column in this tubular column, for example, can pressurize at the well head of this oil gas well, transmit loaded pressure signal to second ignition head 11 through the water column in this tubular column, realize the start-up of second ignition head 11.
After the first perforating gun 5 has perforated the first formation, the production fluid from the first formation may enter the string through the perforations in the screen 6, however, the production fluid from the first formation may carry some sand, and in order to avoid the sand carried in the production fluid from plugging the perforations in the screen 6, the string may further include a drag cup 16, see fig. 3, the drag cup 16 being located between the first perforating gun 5 and the screen 6. The produced liquid of the first reservoir stops sand carried in the produced liquid under the action of the sand dragging leather cup 16, so that the sand carried in the produced liquid is prevented from blocking sieve holes on the sieve tube 6, and the produced liquid of the first reservoir can be ensured to be subjected to oil testing and sampling smoothly.
In sampling each reservoir of the well, since the formation pressure may be low, resulting in insufficient production fluid of each reservoir flowing to the wellhead of the well, in order to perform a test sampling of each reservoir in the well, referring to fig. 3, the tubing string may further include a circulation valve 17, the circulation valve 17 is located between the second tubing 2 and the first firing head 4, and the circulation valve 17 and the first firing head 4 are connected by a fourth tubing 18. Wherein the circulation valve 17 is in a closed state when lowered into the well.
After the second perforating gun 13 completes perforating the second reservoir, the circulation valve 17 is opened to communicate the flow path between the tubing string and the annulus between the tubing string and the casing. And (3) pressurizing the annulus at the wellhead of the oil and gas well based on the well killing fluid, so that the production fluid of the second reservoir at the upper part of the tubular column internal circulation valve 17 can flow to the wellhead of the oil and gas well, and therefore the oil testing sampling of the second reservoir is realized.
After the first perforating gun 5 completes perforating the first reservoir, the circulation valve 17 is opened to communicate the flow path between the tubing string and the annulus between the tubing string and the casing, as described above. And (3) pressurizing the annular space at the wellhead of the oil and gas well based on the well killing fluid, so that the production fluid of the first reservoir at the upper part of the tubular column internal circulation valve 17 can flow to the wellhead of the oil and gas well, and therefore the oil testing sampling of the first reservoir is realized.
The circulating valve 17 may be a sliding sleeve circulating valve or a pressure-controlled circulating valve, and the circulating valve 17 may also be other types of circulating valves, which is not limited in the embodiment of the present invention.
When the sliding sleeve circulating valve is opened or closed, a steel wire can be put into the pipe column, and the sliding sleeve circulating valve is opened or closed under the action of the steel wire. Of course, the opening or closing of the sliding sleeve circulation valve may also be achieved by other manners, which is not limited in the embodiment of the present invention.
When the pressure-controlled circulating valve is opened or closed, the pressure value at the pressure-controlled circulating valve can reach the control pressure of the pressure-controlled circulating valve in a manner of pressurizing at the wellhead of the oil-gas well, so that the pressure-controlled circulating valve is opened or closed.
It should be noted that, in order to avoid the circulating valve 17 to break down in the use process, and then cause that it can't carry out the oil testing sample to each reservoir of oil gas well, when the circulating valve 17 is the sliding sleeve circulating valve, this tubular column still includes the pressure-controlled circulating valve, and the pressure-controlled circulating valve is located between sliding sleeve circulating valve and fourth oil pipe 18, and then can open the pressure-controlled circulating valve when the sliding sleeve circulating valve breaks down, carry out the oil testing sample to each reservoir in this oil gas well. Of course, when the circulating valve 17 is a pressure-controlled circulating valve, the tubular column further comprises a sliding sleeve circulating valve, the sliding sleeve circulating valve is located between the second oil pipe 2 and the pressure-controlled circulating valve, and further, when the pressure-controlled circulating valve fails, the sliding sleeve circulating valve is opened to perform oil testing sampling on each reservoir stratum in the oil-gas well.
In the embodiment of the invention, a pressure gauge supporting cylinder 14, a second perforating gun 13, a time delay device 12, a second ignition head 11, a third oil pipe 10, a shock absorber 15, a pressure control switch 9, a packer 8, an oil pipe short section 7, a sieve pipe 6, a sand dragging leather cup 16, a first perforating gun 5, a first ignition head 4, a fourth oil pipe 18, a circulating valve 17, a second oil pipe 3, a positioning short section 2 and a first oil pipe 1 are sequentially arranged in the oil-gas well, and all the parts are connected. And then, the position of the pipe column is adjusted through the positioning short joint 2, the first perforating gun 6 is ensured to correspond to the first reservoir, the second perforating gun 13 corresponds to the second reservoir, the first reservoir and the second reservoir are isolated through the packer 8, the second reservoir is perforated through the second ignition head 11, the delay device 12 and the second perforating gun 13, and the vibration caused by the second perforating gun 13 is relieved based on the shock absorber 15. After the perforation is finished, the produced liquid in the reservoir flows to the wellhead along the pressure control switch 9 under the action of the formation pressure of the second reservoir, so that sampling is carried out at the wellhead of the oil-gas well to obtain the production data of the second reservoir. And closing the voltage-controlled switch 9, perforating the first reservoir through the first ignition head 4 and the first perforating gun 6, and after the perforation is finished, blocking sand grains carried in the produced liquid of the first reservoir through a sand dragging leather cup under the action of the formation pressure of the first reservoir, wherein the produced liquid of the first reservoir flows to a well head along the sieve tube 5, so that the sampling is carried out at the well head of the oil-gas well to obtain the production data of the first reservoir, and the oil testing sampling of each reservoir in the oil-gas well is realized.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. The utility model provides a formula layering oil testing tubular column, its characterized in that, the tubular column comprises from last down in proper order: the device comprises a first oil pipe, a positioning short section, a second oil pipe, a first ignition head, a first perforating gun, a sieve pipe, an oil pipe short section, a packer, a pressure control switch, a third oil pipe, a second ignition head, a time delay device, a second perforating gun and a pressure gauge support cylinder, wherein all the parts are connected; wherein, at least one pressure gauge is arranged in the pressure gauge supporting cylinder;
when oil testing is carried out on an oil and gas well, the pipe column is lowered into a preset position through the positioning short joint, a first reservoir stratum and a second reservoir stratum located below the first reservoir stratum are isolated through the packer, and after the second reservoir stratum is perforated through the second ignition head, the time delay device and the second perforating gun, sampling is carried out on a well mouth of the oil and gas well through the pressure control switch and the formation pressure of the second reservoir stratum so as to obtain production data of the second reservoir stratum; and closing the pressure control switch, and sampling at the wellhead of the oil and gas well through the screen pipe and the formation pressure of the first reservoir after the first reservoir is perforated through the first ignition head and the first perforating gun so as to obtain the production data of the first reservoir.
2. The tubing string of claim 1, further comprising a circulation valve positioned between the second tubing and the first firing head, the circulation valve connected to the first firing head by a fourth tubing.
3. The string of claim 2, wherein the circulation valve is a slip circulation valve or a pressure controlled circulation valve.
4. The tubing string of claim 3, wherein when the circulation valve is a slip circulation valve, the tubing string further comprises a pressure controlled circulation valve located between the slip circulation valve and the fourth tubing.
5. The string of claim 3, wherein when the circulation valve is a pressure controlled circulation valve, the string further comprises a slip circulation valve positioned between the second tubing and the pressure controlled circulation valve.
6. The string of claim 1, further comprising a sand pulling cup positioned between the first perforating gun and the screen.
7. The string of claim 1, wherein the first firing head is a throw rod firing head and the second firing head is a hydraulic firing head.
8. The tubular string of any one of claims 1-7, further comprising a shock absorber positioned between the pressure control switch and the third tubing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710736782.9A CN109424361B (en) | 2017-08-24 | 2017-08-24 | One-trip layered oil testing pipe column |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710736782.9A CN109424361B (en) | 2017-08-24 | 2017-08-24 | One-trip layered oil testing pipe column |
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| CN109424361A CN109424361A (en) | 2019-03-05 |
| CN109424361B true CN109424361B (en) | 2021-11-30 |
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| CN115977592A (en) * | 2023-03-01 | 2023-04-18 | 电子科技大学 | Speed-frequency self-adaptive clock applied to wireless perforation system |
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| CN2924006Y (en) * | 2005-08-25 | 2007-07-18 | 中国石油天然气集团公司 | Integrated formation-testing pipe string of cross-packer back-perforating, detecting and discharging liquid |
| BRPI0819604B1 (en) * | 2007-11-30 | 2018-11-21 | Schlumberger Holdings Limited | Method for performing multiple zone tests |
| CA2711683C (en) * | 2008-01-11 | 2016-03-15 | Schlumberger Canada Limited | Zonal testing with the use of coiled tubing |
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| CN104863550B (en) * | 2014-02-26 | 2019-09-13 | 中海石油(中国)有限公司上海分公司 | Hydraulic jet perforation and APR testing combination operation technique |
| CN106150445B (en) * | 2015-04-14 | 2018-09-21 | 大庆丹枫石油技术开发有限公司 | Two layers of layering perforation-zonal testing axle-linked cable-car of one-trip string and its operating method |
| CN106150446B (en) * | 2015-04-14 | 2018-12-21 | 华通科创(唐山)石油工程技术服务有限公司 | It is a kind of can Xian Ce lower layer across every combined operation of perforation and testing tubing string and its operating method |
| CN204703871U (en) * | 2015-05-04 | 2015-10-14 | 中国石油天然气股份有限公司 | Across every under return caber perforation, test integration of operation tubing string |
| CN105089514B (en) * | 2015-05-29 | 2017-05-10 | 中国石油天然气股份有限公司 | Layering perforation and oil testing pipe column and use method thereof |
| CN106812521A (en) * | 2015-11-30 | 2017-06-09 | 中国石油天然气股份有限公司 | Formation testing device and formation testing tubing string |
| CN105545282A (en) * | 2015-12-10 | 2016-05-04 | 中国石油天然气股份有限公司 | Layering continuous well testing system and use method thereof |
| CN106593314B (en) * | 2016-12-20 | 2019-03-15 | 中国石油天然气股份有限公司 | A kind of deep water high temperature and pressure oil/gas well test string |
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2017
- 2017-08-24 CN CN201710736782.9A patent/CN109424361B/en active Active
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