CN111155992B - Multi-layer combined oil testing device and method - Google Patents
Multi-layer combined oil testing device and method Download PDFInfo
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- CN111155992B CN111155992B CN201811319759.0A CN201811319759A CN111155992B CN 111155992 B CN111155992 B CN 111155992B CN 201811319759 A CN201811319759 A CN 201811319759A CN 111155992 B CN111155992 B CN 111155992B
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- 238000005259 measurement Methods 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 11
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- 238000010998 test method Methods 0.000 claims 1
- 239000003208 petroleum Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 15
- 239000003129 oil well Substances 0.000 description 11
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- 238000010586 diagram Methods 0.000 description 3
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- 230000008859 change Effects 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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 OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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Abstract
The invention relates to the technical field of petroleum exploitation, and provides a multi-layer combined oil testing device and method. The device comprises a perforating string (1) and a test tubing string (2), wherein the perforating string (1) comprises a first positioning nipple (11) connected with an oil pipe (3), a circulating valve (12) connected with the lower end of the first positioning nipple (11), an ignition device (13) connected with the lower end of the circulating valve (12) and at least three perforating guns (14) positioned below the ignition device (13), and detonating cords (16) are connected between adjacent perforating guns (14); the oil testing pipe column (2) comprises a second positioning nipple (21) connected with the oil pipe (3), at least two packers (23) connected with the second positioning nipple (21) and at least three voltage-controlled electric switch valves (24), and one packer (23) is connected between every two adjacent voltage-controlled electric switch valves (24). The perforating string can complete multi-layer perforation in one pass, and the oil testing string can complete layered oil testing operation in one pass.
Description
Technical Field
The invention relates to the technical field of petroleum exploitation, in particular to a multi-layer combined oil testing device and method.
Background
In the production process of oil field oil and gas well, mutual interference exists between stratum of different production liquid types and different pressure systems, contribution of each production layer to the whole production liquid capacity is different, and data such as productivity, liquid property and pressure recovery curve of each small layer are difficult to obtain by general oil test, so that oil test conclusion and accuracy and qualitative of the reservoir are influenced, and layered oil test becomes the most direct and reliable yield calculation method in oil reservoir development and an important means for knowing the oil output, water output and pressure of each oil layer.
The layering oil testing operation technology is finished by the first-pass pipe column, two layers of layering perforation can be realized by the first-pass pipe column, the pipe column is lowered to a preset position in a well, after the oil testing operation of the corresponding two layers of oil producing layers is finished, well killing is carried out on the oil producing layers with the tested oil by injecting well killing liquid, the pipe column is lowered again, the oil testing operation of the corresponding two layers of oil producing layers is finished, and the oil testing operation is sequentially carried out on all the oil producing layers in the well.
In the implementation process of the present invention, the inventor finds that at least the following problems exist in the prior art: the layering oil testing operation technology is finished by the first-pass pipe column, the layering perforation or oil testing operation of two layers can only be realized by the first-pass pipe column, but multi-layer oil wells with more than two layers are faced, the layering perforation and oil testing operation are needed to be carried out by taking the pipe column down for many times, the construction period is long, the cost is high, the oil testing operation of two layers of production layers is carried out synchronously in the prior art, the production data in different production layers are different, the inaccuracy of petroleum conclusion can be influenced, well killing is needed before the pipe column is put down again, and the production layer pollution is easily caused by multi-time well killing.
Disclosure of Invention
In view of this, the embodiment of the application provides a multi-layer combined oil testing device and method, which completes the layered oil testing operation on the multi-layer oil layer by one pipe column, and the specific technical scheme is as follows:
a first aspect of an embodiment of the present application provides a multi-layer combined oil testing device, including: a perforating string and a test tubing string, wherein,
the perforating string comprises a first positioning nipple, a circulating valve, an ignition device and at least three perforating guns, wherein the first positioning nipple is suitable for determining the position of the perforating string, the upper end of the first positioning nipple is connected with an oil pipe, the lower end of the first positioning nipple is connected with the upper end of the circulating valve, the circulating valve is suitable for communicating the inside of a well with the oil pipe, the lower end of the circulating valve is connected with the upper end of the ignition device, the lower end of the ignition device is connected with the upper end of the perforating gun positioned at the uppermost position, each of the at least three perforating guns is used for shooting an oil layer corresponding to the depth of the perforating gun, and detonating cords are connected between adjacent perforating guns;
the oil testing pipe column comprises a second positioning nipple, at least two packers and at least three voltage-controlled electric switch valves, the second positioning nipple is suitable for determining the position of the oil testing pipe column, the upper end of the second positioning nipple is connected with an oil pipe, the lower end of the second positioning nipple is connected with the upper end of the voltage-controlled electric switch valve located at the uppermost position, one packer is connected between every two adjacent voltage-controlled electric switch valves, and each voltage-controlled electric switch valve of the at least three voltage-controlled electric switch valves is used for controlling the communication between an oil layer corresponding to the depth where the pressure-controlled electric switch valve is located and the oil pipe.
Optionally, the perforating string further comprises a connecting oil pipe, adjacent perforating guns are connected through the connecting oil pipe, the detonating cord is located in the connecting oil pipe, and the connecting oil pipe is connected with each perforating gun through threads.
Alternatively, the firing device is adapted to fire the uppermost positioned perforating gun and the detonating cord is adapted to fire other perforating guns of the at least three perforating guns than the uppermost positioned perforating gun.
Optionally, the oil testing pipe column further comprises a hydraulic jet pump, wherein the hydraulic jet pump comprises a pump seat and a pump core, and when the oil layer cannot be produced by self-injection or the oil layer needs to be produced by non-self-injection, the pump core is put into the pump seat so as to start the hydraulic jet pump to enable the oil layer to produce oil.
Optionally, the upper end of the hydraulic jet pump is connected with the lower end of the second positioning nipple through threads, and the lower end of the hydraulic jet pump is connected with the upper end of the packer at the uppermost position through threads.
Optionally, the oil testing pipe column further comprises a plug, and the plug is in threaded connection with the lower end of the pressure-controlled electric switch valve located at the lowest position.
A second aspect of the embodiments of the present application provides a multi-layer joint operation oil testing method, including:
lowering the perforating string to a first preset position in the well, wherein the first preset position refers to the position of each perforating gun aligned with an oil layer corresponding to the depth of the perforating gun;
detonating the at least three perforating guns, and shooting an oil layer corresponding to the depth of each perforating gun by each perforating gun;
lifting out the perforating pipe column and scraping the inner wall of the well;
lowering the oil testing pipe column to a second preset position in the well, wherein the second preset position refers to the position of each pressure-controlled electric switching valve aligned to an oil layer corresponding to the depth of the pressure-controlled electric switching valve;
and setting all the packers, and opening one voltage-controlled electric switch valve each time to enable the corresponding oil layer to produce oil to obtain the output data of each oil layer, wherein the at least three voltage-controlled electric switch valves are opened each time according to the sequence from bottom to top.
Optionally, the lowering the perforating string to a first preset position in the well comprises:
and adjusting the perforating string to the first preset position according to the measurement result by detecting the position of the first positioning nipple.
Optionally, the detonating the at least three perforating guns, and the firing of the oil layer corresponding to the depth of each perforating gun comprises:
and detonating the ignition device to enable the perforating gun at the uppermost position to shoot out an oil layer corresponding to the depth of the perforating gun, detonating the detonating cord, detonating other perforating guns except the perforating gun at the uppermost position in the at least three perforating guns by the detonating cord, and enabling each perforating gun to shoot out the oil layer corresponding to the depth of the perforating gun.
Optionally, the lowering the test tubing string to a second preset position in the well comprises:
and adjusting the oil test pipe column to the second preset position according to the measurement result by measuring the position of the second positioning nipple.
Optionally, the opening of one voltage-controlled electric switch valve at a time includes:
the method comprises the steps of controlling pressure in a pipe column through a ground pump, changing the pressure value in the pipe column, setting the pressure in the pipe column to be a first group of specific pressure values, and controlling to open the target voltage-controlled electric switching valve when the first group of specific pressure values are consistent with a preset opening code of the target voltage-controlled electric switching valve, so as to obtain yield data of a target oil layer corresponding to the depth of the target voltage-controlled electric switching valve;
and changing the pressure value in the pipe column again, setting the pressure in the pipe column as a second group of specific pressure values, and controlling to close the target voltage-controlled electric switch valve when the second group of specific pressure values are consistent with a closing code preset by the target voltage-controlled electric switch valve.
Optionally, the oil test pipe column further includes a hydraulic jet pump, the hydraulic jet pump includes a pump seat and a pump core, and the pressure-controlled electric switch valve is opened each time, and further includes:
if the target oil layer corresponding to the depth of the target pressure-controlled electric switching valve cannot be subjected to self-injection production or the target oil layer is required to be subjected to non-self-injection production, the pump core is put into the pump seat from the wellhead, and the hydraulic jet pump works to enable the target oil layer to be produced;
and after the target voltage-controlled electric switch valve is closed, the pump core is taken out.
The beneficial effects of the technical scheme provided by the embodiment of the application at least comprise:
the perforating string of the multilayer combined oil testing device provided by the embodiment of the application can determine the position of each perforating gun through the first positioning pup joint, so that each perforating gun is guaranteed to be aligned to an oil layer corresponding to the depth of each perforating gun, the perforating gun positioned at the uppermost position is detonated by the ignition device, the detonating cord is detonated, the perforating guns at other positions are detonated by the detonating cord, each perforating gun is enabled to fire the oil layer corresponding to the depth of each perforating gun, and therefore perforating operation of the multilayer oil layer can be completed through one perforating string, and the circulation valve of the perforating string can guarantee communication between the inside of a well and an oil pipe. After perforation is completed, a perforating string is started, and then a test tubing string is started, the position of each pressure-controlled electric switch valve can be determined through a second positioning nipple, each pressure-controlled electric switch valve is guaranteed to be aligned to an oil layer corresponding to the depth of the pressure-controlled electric switch valve, a packer is connected between every two adjacent pressure-controlled electric switch valves, all the packers are opened, an oil well is sealed into a plurality of parts according to the position of the oil layer, when each pressure-controlled electric switch valve is independently opened, the well section of the pressure-controlled electric switch valve is in a sealed state, the accuracy of obtaining the output data of each oil layer is guaranteed, and the sealing of each oil layer can be completed through the test tubing string to independently obtain the output data of each oil layer, so that the efficiency of layered oil testing of the oil well is improved. And the perforating string and the oil test string are simple in structure and convenient to operate.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiments will be briefly described.
FIG. 1 is a schematic structural diagram of a perforating string of a multi-layer combined oil testing device according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a test tubing string of the multi-layer combined oil test device according to the embodiment of the present application;
fig. 3 is a schematic structural diagram of a hydraulic jet pump in a test tubing string according to an embodiment of the present disclosure;
fig. 4 is a flowchart of a multi-layer joint operation oil testing method provided in an embodiment of the present application.
Reference numerals in the drawings denote:
1-perforating string; 11-a first positioning nipple; 12-a circulation valve; 13-an ignition device; 131—ignition head; 14-perforating gun; 15-connecting an oil pipe; 16-detonating cord;
2-testing the tubing string; 21-a second positioning nipple; 22-a hydraulic jet pump; 221-pump base; 222—a pump core; 23-packer; 231-rubber cylinder; 24-a voltage-controlled electric switch valve; 25-plug;
3-an oil pipe;
4-oil layer.
Detailed Description
The multilayer combined oil testing device comprises a perforating string and an oil testing string. The perforating pipe column comprises a first positioning nipple, a circulating valve, an ignition device and at least three perforating guns, wherein the first positioning nipple is suitable for determining the position of the perforating pipe column, the upper end of the first positioning nipple is connected with an oil pipe, the lower end of the first positioning nipple is connected with the upper end of the circulating valve, the circulating valve is suitable for communicating the inside of a well with the oil pipe, the lower end of the circulating valve is connected with the upper end of the ignition device, the lower end of the ignition device is connected with the upper end of the perforating gun positioned at the uppermost position, each of the at least three perforating guns is used for shooting an oil layer corresponding to the depth of the perforating gun, and detonating cords are connected between adjacent perforating guns; the oil testing pipe column comprises a second positioning nipple, at least two packers and at least three voltage-controlled electric switch valves, the second positioning nipple is suitable for determining the position of the oil testing pipe column, the upper end of the second positioning nipple is connected with an oil pipe, the lower end of the second positioning nipple is connected with the upper end of the voltage-controlled electric switch valve positioned at the uppermost position, one packer is connected between the adjacent voltage-controlled electric switch valves, and each voltage-controlled electric switch valve in the at least three voltage-controlled electric switch valves is used for controlling the communication between an oil layer corresponding to the depth of the oil layer and the oil pipe.
The perforating string of the multilayer combined oil testing device provided by the embodiment of the application can determine the position of each perforating gun through the first positioning pup joint, so that each perforating gun is guaranteed to be aligned to an oil layer corresponding to the depth of each perforating gun, the perforating gun positioned at the uppermost position is detonated by the ignition device, the detonating cord is detonated, the perforating guns at other positions are detonated by the detonating cord, each perforating gun is enabled to fire the oil layer corresponding to the depth of each perforating gun, and therefore perforating operation of the multilayer oil layer can be completed through one perforating string, and the circulation valve of the perforating string can guarantee communication between the inside of a well and an oil pipe. After perforation is completed, a perforating string is started, and then a test tubing string is started, the position of each pressure-controlled electric switch valve can be determined through a second positioning nipple, each pressure-controlled electric switch valve is guaranteed to be aligned to an oil layer corresponding to the depth of the pressure-controlled electric switch valve, a packer is connected between every two adjacent pressure-controlled electric switch valves, all the packers are opened, an oil well is sealed into a plurality of parts according to the position of the oil layer, when each pressure-controlled electric switch valve is independently opened, the well section of the pressure-controlled electric switch valve is in a sealed state, the accuracy of obtaining the output data of each oil layer is guaranteed, and the sealing of each oil layer can be completed through the test tubing string to independently obtain the output data of each oil layer, so that the efficiency of layered oil testing of the oil well is improved. And the perforating string and the oil test string are simple in structure and convenient to operate.
In order to make the technical scheme and advantages of the present invention more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.
The embodiment of the application provides a multilayer combined oil testing device, which comprises a perforating string 1 and a oil testing string 2.
Referring to fig. 1, the perforating string 1 comprises a first positioning nipple 11, a circulation valve 12, an ignition device 13 and at least three perforating guns 14, wherein the first positioning nipple 11 is suitable for determining the position of the perforating string 1, the upper end of the first positioning nipple 11 is connected with an oil pipe 3, the lower end of the first positioning nipple is connected with the upper end of the circulation valve 12, the lower end of the circulation valve 12 is connected with the upper end of the ignition device 13, and the circulation valve 12 is suitable for communicating the inside of a well with the oil pipe 3.
For example, in this embodiment of the present application, the first positioning nipple 11 may be a short oil pipe, the length of the first positioning nipple 11 is shorter, the specific position of the whole first positioning nipple 11 is conveniently measured, in the process of lowering the whole perforating string 1 into the well, the position of each perforating gun 14 may be obtained by measuring the position of the first positioning nipple 11, the upper end of the first positioning nipple 11 is connected with the oil pipe 3, the lower end is connected with the upper end of the circulation valve 12, the circulation valve 12 may be a three-nozzle circulation valve 12, that is, the circulation valve 12 includes an upper port and a lower port and a port opened at one side, the upper port and the lower port form a main path, the main path is further communicated with the oil pipe 3 through the first positioning nipple 11, the side opening port is a bypass, the main path of the circulation valve 12 is communicated with the bypass through the bypass of the circulation valve 12, and the well is further communicated with the oil pipe 3, so that the pressure intensity in the well is consistent with the atmospheric pressure.
Referring to fig. 1, the lower end of the circulation valve 12 is connected with the upper end of the ignition device 13, the lower end of the ignition device 13 is connected with the upper end of the perforating gun 14 positioned at the uppermost position, each perforating gun 14 of at least three perforating guns 14 is used for shooting out the oil layer 4 corresponding to the depth of the perforating gun, and a detonating cord 16 is connected between adjacent perforating guns 14.
In the present embodiment, the ignition device 13 is adapted to detonate a perforating gun 14 located at the uppermost position. For example, the inner cavity of the ignition device 13 may include an ignition head 131, and in an implementation manner of this embodiment of the present application, the ignition head 131 may be detonated by a rod throwing manner, so as to detonate a perforating gun 14 connected to the ignition device 13 and located at the uppermost position, so that the perforating gun 14 shoots the oil layer 4 corresponding to the depth where the perforating gun is located. Of course, the present application is not limited thereto, and in other embodiments of the present application, the ignition head 131 may be detonated by pressurizing the inner cavity of the ignition device 13, or may be connected to a ground power source to detonate the ignition head 131 by using electric energy, so as to detonate the perforating gun 14, so that the perforating gun 14 fires the oil layer 4 corresponding to the depth of the perforating gun.
The detonating cord 16 is adapted to detonate other ones 14 of the at least three perforating guns 14 than the uppermost perforating gun 14.
For example, when the perforating string 1 comprises at least three perforating guns 14, detonating cords 16 are connected between adjacent perforating guns 14, so that only one ignition device 13 is required to be connected to the upper end of the perforating gun 14 at the uppermost position, after the ignition device 13 is detonated, the perforating gun 14 connected with the ignition device 13 at the uppermost position is detonated, and each perforating gun 14 is detonated through the detonating cord 16 between the adjacent perforating guns 14, and each perforating gun 14 fires the oil layer 4 corresponding to the depth of the oil layer.
Referring to fig. 1, the perforating string 1 may further comprise a connecting oil pipe 15, adjacent perforating guns 14 are connected by the connecting oil pipe 15, detonating cord 16 is located in the connecting oil pipe 15, and the connecting oil pipe 15 is connected with each perforating gun 14 through threads.
For example, in the embodiment of the present application, adjacent perforating guns 14 may be connected through a connecting oil pipe 15, and a detonating cord 16 is placed in the connecting oil pipe 15, on the one hand, the length of the connecting oil pipe 15 is determined, and the position of each perforating gun 14 of the perforating string 1 can be obtained by the known length data of the connecting oil pipe 15 and the position of the first positioning nipple 11, so that the perforating string 1 is conveniently adjusted to align each perforating gun 14 with the oil layer 4; on the other hand, the detonating cord 16 is placed in the connecting oil pipe 15, so that the detonating cord 16 can be better protected. In addition, the perforating gun 14 and the connecting oil pipe 15 can be connected through threads, however, the application is not limited to the above, and in other embodiments, the perforating gun 14 and the connecting oil pipe 15 can be connected in other reasonable manners.
In the embodiment of the present application, in order to prevent impurities and the like entering during the operation of the perforating gun 14 from affecting the operation of the perforating gun 14, a plug may be connected to the lower end of the perforating gun 14 located at the lowest position. Of course, the present application is not limited thereto, and in other embodiments, the perforating string 1 may be plugged in other reasonable manners or by other means.
For example, in the embodiment of the present application, the components of the perforating string 1 may be connected by threads, and the components may be connected by a connecting tubing 15 according to the actual depth of each reservoir in the well. Of course, the present application is not limited thereto, and in other embodiments of the present application, the components of the perforating string 1 may be connected by other reasonable means, and other reasonable connecting components may be connected between the components.
Referring to fig. 2, the oil test pipe string 2 comprises a second positioning nipple 21, at least two packers 23 and at least three voltage-controlled electric switch valves 24, the second positioning nipple 21 is suitable for determining the position of the oil test pipe string 2, the upper end of the second positioning nipple 21 is connected with the oil pipe 3, the lower end is connected with the upper end of the voltage-controlled electric switch valve 24 at the uppermost position, one packer 23 is connected between the adjacent voltage-controlled electric switch valves 24, and each voltage-controlled electric switch valve 24 in the at least three voltage-controlled electric switch valves 24 is used for controlling the communication between the oil layer 4 corresponding to the depth of the oil layer and the oil pipe 3.
For example, in the embodiment of the present application, the second positioning nipple 21 of the test tubing string 2 may be the same as the first positioning nipple 11 of the perforating string 1, and is a short oil pipe, the length of the second positioning nipple 21 is shorter, so that a specific position of the entire second positioning nipple 21 is conveniently measured, and when the entire test tubing string 2 is lowered into a well, the position of the second positioning nipple 21 is conveniently measured, so as to obtain the position of each voltage-controlled electric switch valve 24.
The upper end of the second positioning nipple 21 is connected with the oil pipe 3, and the lower end is connected with the upper end of the packer 23 at the uppermost position. In this application embodiment, the outer wall of packer 23 can suit hollow packing element 231, and the inner chamber of packer 23 is suitable for pressure-controlled electronic ooff valve 24 and oil pipe 3 intercommunication, and packing element 231 is suitable for the well packing when expanding, when all packers 23 all expand, can pack the oil well into several parts according to the position that oil reservoir 4 is located to the convenience obtains the output data of each oil reservoir 4. In one implementation of the embodiment of the present application, the packer 23 may be inflated by enhancing the hydraulic pressure to seal the oil well, however, the inflation mode of the packer 23 is not limited thereto, and in other implementations of the embodiment of the present application, the packing 231 may be inflated by mechanically extruding the packing 231 to seal the oil well, or other reasonable manners may be adopted to seal the oil well.
For example, one packer 23 may be connected between adjacent pressure-controlled electric switching valves 24, and in order to save resources, the packer 23 may not be connected to the upper end of the pressure-controlled electric switching valve 24 located at the uppermost position, and likewise, the packer 23 may not be connected to the lower end of the pressure-controlled electric switching valve 24 located at the lowermost position. Each voltage-controlled electric switch valve 24 is used for controlling the communication between the oil layer 4 corresponding to the depth of the voltage-controlled electric switch valve and the oil pipe 3, when one voltage-controlled electric switch valve 24 is opened, namely the communication between the oil layer 4 corresponding to the depth of the voltage-controlled electric switch valve and the oil pipe 3 is performed, and meanwhile, other voltage-controlled electric switch valves 24 are in a closed state, so that the yield data of the corresponding oil layer 4 can be obtained without being influenced by other oil layers 4.
For example, in the embodiment of the present application, each voltage-controlled electric switch valve 24 may include an upper port and a lower port and a side-opened port, where the upper port and the lower port of the voltage-controlled electric switch valve 24 form a main path and ensure the communication of the main path, the side-opened port may be provided with a voltage-controlled valve, and the opening code and the closing code of the valve of each voltage-controlled electric switch valve 24 are set in advance, and the opening code and the closing code of each voltage-controlled electric switch valve 24 are ensured to be different. The pressure in the pipe column is set to be a first group of specific pressure values by controlling the change of the pressure in the pipe column through the ground pump, when the pressure values in the group are consistent with the preset opening code of a certain voltage-controlled electric switch valve 24, the valve opening of the voltage-controlled electric switch valve 24 can be controlled, so that an oil layer 4 corresponding to the depth of the voltage-controlled electric switch valve 24 is communicated with an oil pipe 3, and the output data of the oil layer 4 can be obtained. The pressure value in the pipe column is changed by pressurizing the ground pump again, the pressure value in the pipe column is set to be a second group of specific pressure value again, and when the second group of pressure value is consistent with the closing code of the pressure-controlled electric switch valve 24, the pressure-controlled electric switch valve 24 is controlled to be closed.
Referring to fig. 2, in an embodiment of the present application, the test tubing string 2 may further include a hydro jet pump 22, and the hydro jet pump 22 may include a pump seat 221 and a pump core 222, wherein when the target reservoir 4 cannot be self-injection produced or non-self-injection production of the target reservoir 4 is desired, the pump core 222 is inserted into the pump seat 221 to activate the hydro jet pump 22 so that the target reservoir 4 produces oil.
For example, in the embodiment of the present application, referring to fig. 3, the pump seat 221 of the hydraulic jet pump 22 may have a stepped inner cavity, and the pump core 222 may have an inverted trapezoid corresponding to the inner cavity of the pump seat 221, so that when the oil layer 4 may be produced by self-injection or when the oil layer 4 is required to be produced by self-injection, the pump core 222 is not required to be put into communication with the inner cavity of the whole oil test pipe column 2. When the oil layer 4 can not be self-injection produced or the oil layer 4 needs to be non-self-injection produced, the pump core 222 can be put into the pump seat 221, the lower end of the pump core 222 can be clamped in the stepped inner cavity of the pump seat 221, the pump core 222 can drive the hydraulic jet pump 22 to work, so that the oil layer 4 can be produced, and after the output data of the oil layer 4 are obtained, the lower steel wire is fished out of the pump core 222. Of course, the present application is not limited thereto, and in other embodiments, backwashing or other reasonable means of removing the pump core 222 may be employed.
In the embodiment of the application, the upper end of the hydraulic jet pump 22 can be connected with the second positioning nipple 21 through threads, and the lower end can be connected with the upper end of the packer 23 at the uppermost position through threads. Of course, the present application is not limited thereto, and in other embodiments of the present application, the upper end of the hydraulic jet pump 22 and the lower end of the second positioning nipple 21 and the lower end of the hydraulic jet pump 22 and the upper end of the uppermost packer 23 may be connected in other reasonable manners.
Referring to fig. 2, in this embodiment of the present application, the oil testing string 2 may further include a plug 25, where the upper end of the plug 25 may be connected to the lower end of the pressure-controlled electric switch valve 24 at the lowest position through a thread, and the lower end of the plug 25 is closed, so that the lower end of the pressure-controlled electric switch valve 24 at the lowest position may be plugged by the plug 25, and further the lower end of the whole oil testing string 2 is plugged, so that in the oil testing process, only the pressure-controlled switch valve 24 may be used to control the communication between the oil layer 4 and the oil pipe 3, and inaccurate output data of the obtained oil layer 4 caused by leakage of oil in the oil testing process is avoided. Of course, the present application is not limited thereto, and in other embodiments, the lower end of the pressure-controlled electric switch valve 24 at the lowest position may be plugged in other reasonable manners.
The embodiment of the application also provides a multi-layer combined oil testing method, referring to fig. 4, the multi-layer combined oil testing method by adopting the oil testing device comprises the following steps:
s1, lowering the perforating string 1 to a first preset position in the well, wherein the first preset position refers to the position when each perforating gun 14 is aligned with the oil layer 4 corresponding to the depth of the perforating gun.
For example, in the embodiment of the present application, before performing the oil testing operation, the oil layer 4 of the target oil well is first detected, and the position of the oil layer 4 in the oil well is measured, where each perforating gun 14 is aligned with the oil layer 4 corresponding to the depth of the perforating gun, that is, the first preset position. This ensures the accuracy of each perforating gun 14 in firing the corresponding reservoir 4.
This step may include adjusting the perforating string 1 to a first preset position by measuring the position of the first locating nipple 11 and by the measurement.
For example, in the embodiment of the present application, the length of the first positioning nipple 11 is shorter, so that the specific position of the whole first positioning nipple 11 is conveniently measured, in the actual operation process, the position of the first positioning nipple 11 can be accurately and conveniently measured, and the lengths of the circulation valve 12, the ignition device 13, each perforation gun 14 and the connecting oil pipe 15 are all fixed, so that the position of each perforation gun 14 can be known through the specific position of the measured first positioning nipple 11, and then the perforation tubular column 1 is adjusted to the first preset position through the measurement result, so that each perforation gun 14 is aligned to the oil layer 4 corresponding to the depth where the perforation gun 14 is located.
S2, detonating at least three perforating guns 14 in the perforating string 1, and shooting the oil layer 4 corresponding to the depth of each perforating gun 14.
The step may include detonating the ignition device 13, so that the perforating gun 14 at the uppermost position shoots out the oil layer 4 corresponding to the depth of the perforating gun, and detonating the detonating cord 16, and detonating other perforating guns 14 except the perforating gun 14 at the uppermost position in the perforating string 1 by the detonating cord 16, wherein each perforating gun 14 shoots out the oil layer 4 corresponding to the depth of the perforating gun.
For example, in the embodiment of the present application, the upper end of the perforating gun 14 located at the uppermost position of the perforating string 1 is connected with the ignition device 13, and a detonating cord 16 is connected between adjacent perforating guns 14, after the ignition device 13 is detonated, the perforating gun 14 located at the uppermost position detonates, the oil layer 4 corresponding to the depth where the detonating cord is located is shot, after the perforating gun 14 located at the uppermost position is detonated, the subsequent perforating gun 14 is detonated by the detonating cord 16 between the perforating guns 14, and then the oil layer 4 corresponding to the depth where each perforating gun 14 is located is shot, namely all the perforating guns 14 are detonated, and then all the oil layers 4 are shot.
S3, lifting out the perforating string 1 and scraping the inner wall of the well.
For example, in the embodiment of the present application, after each layer of oil layer 4 is shot by using the perforating string 1, the perforating string 1 is started, the test tubing string 2 is replaced, in order to ensure the packing effect of the packer 23 of the test tubing string 2, before the test tubing string 2 is lowered, the inner wall of the well is repeatedly scraped, especially, the well section corresponding to the oil layer and the well section corresponding to each packer setting position are repeatedly scraped, so that the inner wall of the well is as smooth as possible, and the setting effect of the packer is ensured.
And S4, lowering the oil testing pipe column 2 to a second preset position in the well, wherein the second preset position refers to the position when each voltage-controlled electric switch valve 24 is aligned with the oil layer 4 corresponding to the depth of the voltage-controlled electric switch valve.
This step may include adjusting the test tubing string 2 to a second preset position by measuring the position of the second locating nipple 21 and based on the measurement.
In this embodiment of the present application, after the inner wall of the well is scraped repeatedly, the test tubing string 2 is lowered, the second positioning nipple 21 on the test tubing string 2 acts like the first positioning nipple 11 on the perforating string 1, the position of each pressure-controlled electric switching valve 24 can be obtained by measuring the position of the second positioning nipple 21, and the test tubing string 2 is adjusted to a second preset position through the measurement result, so that the side-opened port of each pressure-controlled electric switching valve 24 is aligned to the oil layer 4 corresponding to the depth of the side-opened port.
And S5, setting all the packers 23, opening one voltage-controlled electric switch valve 24 at a time, and producing oil from the corresponding oil layer 4 to obtain output data of each oil layer 4, wherein the voltage-controlled electric switch valves 24 in the oil test pipe column 2 are opened one voltage-controlled electric switch valve 24 at a time in sequence from bottom to top.
This step may include:
the pressure in the pipe column is controlled through the ground pump, the pressure in the pipe column is set to be a first group of specific pressure values through changing the pressure value in the pipe column, and when the first group of specific pressure values are consistent with the preset opening codes of the target voltage-controlled electric switch valve 24, the target voltage-controlled electric switch valve 24 is controlled to be opened, so that yield data of the target oil layer 4 corresponding to the depth of the voltage-controlled electric switch is obtained;
and changing the pressure value in the pipe column again, setting the pressure in the pipe column to be a second group of specific pressure values, and controlling to close the target voltage-controlled electric switch valve 24 when the second group of specific pressure values are consistent with the preset closing code of the target voltage-controlled electric switch valve 24.
The step may further comprise:
if the target oil layer 4 corresponding to the depth of the target voltage-controlled electric switch cannot be subjected to self-injection production or the target oil layer 4 needs to be subjected to non-self-injection production, a pump core 222 is put into a pump seat 221 of the hydraulic jet pump 22 from a wellhead, and the hydraulic jet pump 22 works to enable the target oil layer 4 to be produced;
after the target pressure-controlled electric switching valves 24 are closed, the pump cores 222 are taken out, wherein the opening code and the closing code of each pressure-controlled electric switching valve 24 are different.
For example, in the embodiment of the present application, after the test tubing string 2 is lowered to the second preset position, all the packers 23 are set, the well is divided into several parts by the packers 23 according to the positions of all the oil layers 4, and the side-opened ports of each pressure-controlled electric switch valve 24 are aligned with the oil layers 4 corresponding to the depths thereof.
The pressure in the pipe column is controlled by the ground pump, the pressure value in the pipe column is changed, the pressure in the pipe column is set to be a first set of specific pressure value, for example, the pressure in the pipe column is maintained to be a specific value by the ground pump, after a certain time interval, the pressure value in the pipe column is changed, a certain time is maintained, the pressure value in the pipe column is changed again, a certain time is maintained, the pipe column is sequentially reciprocated to form a first set of specific pressure value, when the first set of specific pressure value is consistent with a preset opening code of the target voltage-controlled electric switch valve 24, the side-opened valve of the target voltage-controlled electric switch valve 24 is controlled to be opened, the target oil layer 4 is communicated with the oil pipe 3 through the target voltage-controlled electric switch valve 24, and further, the performance and the oil production data of the target oil layer 4 can be measured by workers.
And after the production data and performance of the target oil layer 4 are measured, changing the pressure value in the pipe column again, setting the pressure value in the pipe column to be a second group of specific pressure values, and controlling the side-opened valve of the target pressure-controlled electric switch valve 24 to be closed when the second group of specific pressure values are consistent with the preset closing code of the target pressure-controlled electric switch valve 24, so as to finish the measurement of the target oil layer.
In addition, in the embodiment of the present application, when the target oil layer 4 to be measured cannot be produced by self-injection or the target oil layer 4 needs to be produced by non-self-injection, the pump core 222 may be put into the pump seat 221 of the hydraulic jet pump 22 from the wellhead, and the hydraulic jet pump 22 is started to further enable the target oil layer 4 to be produced, so that the measurement is convenient. After the pump core 222 is taken out, the control closes the pressure-controlled electric switching valve 24 corresponding to the target oil layer 4.
Taking three layers of oil layers as an example, the multi-layer combined oil testing device and the multi-layer combined oil testing method can be suitable for more layers of oil testing operations. The oil testing device comprises the following steps of:
first, according to the distribution of three layers of oil layers, a perforating string 1 including three perforating guns 14 is lowered, and the interval between each perforating gun 14 is set according to the interval of each layer of oil layers 4, by measuring the position of a first positioning nipple 11 and adjusting the whole perforating string 1 to a first preset position according to the measurement result.
The ignition head 131 in the ignition device 13 is detonated to detonate the perforating gun 14 at the uppermost position, the perforating gun 14 shoots the corresponding perforating gun 14 at the uppermost oil layer 4, the detonating cord 16 detonates the perforating gun 14 at the intermediate position, the corresponding oil layer 4 at the intermediate position is shot, and finally the detonating cord 16 detonates the perforating gun 14 at the lowermost position, and the oil layer 4 at the lowermost position is shot.
After all the three layers of oil layers are shot, the perforating string 1 is lifted up, and the well cleaner is lowered to scrape the inner wall of the well.
After the scraping is qualified, the intervals among the pressure-controlled electric switch valves 24 are arranged according to the intervals among the oil layers 4, the oil testing pipe column 2 with all the pressure-controlled electric switch valves 24 in a closed state and all the packers 23 in a normal state is lowered into a well, and the position of the second positioning nipple 21 is measured, and the second preset position of the oil testing pipe column 2 is measured according to the measurement result.
Then, all of the packers 23 are expanded so that all of the packers 23 are well set against the borehole wall.
The pressure in the pipe column is set to be a first group of specific pressure values through the pressure in the pipe column of the ground pump, when the first group of specific pressure values are consistent with the preset opening codes of the valve of the pressure-controlled electric switch valve 24 positioned at the lowest position, the valve of the pressure-controlled electric switch valve 24 is controlled to be opened, so that the lowest oil layer 4 is communicated with the oil pipe 3, and the performance and yield data of the oil layer 4 can be measured by staff.
If the oil layer 4 cannot be produced by self-injection or the oil layer 4 needs to be produced by non-self-injection, the pump core 222 is put into the pump seat 221 of the hydraulic jet pump 22 from the wellhead, the hydraulic jet pump 22 is started to produce the oil layer, and the performance and yield data of the oil layer are measured.
The pump core 222 is fished out, the pressure in the pipe column is set to be a second set of specific pressure value by re-pressing the pipe column, and when the second set of specific pressure value is consistent with the preset closing code of the valve of the pressure-controlled electric switch valve 24 positioned at the lowest position, the valve of the pressure-controlled electric switch valve 24 is controlled to be closed.
Next, the pressure in the pipe column is set to a third set of specific pressure values by the ground pump, when the third set of specific pressure values is consistent with the preset opening code of the valve of the pressure-controlled electric switch valve 24 positioned at the middle position, the valve of the pressure-controlled electric switch valve 24 is controlled to be opened, so that the oil layer at the middle position is communicated with the oil pipe 3, and the staff can measure the performance and yield data of the corresponding oil layer 4.
If the oil layer 4 cannot be produced by self-injection or the oil layer 4 needs to be produced by non-self-injection, a pump core 222 is put into a pump seat 221 of the hydraulic jet pump 22 from a wellhead, the hydraulic jet pump 22 is started to produce the oil layer 4, and the performance and yield data of the oil layer 4 are measured.
The pump core 222 is fished out, the pressure in the pipe column is set to be a fourth set of specific pressure value by re-pressing the pipe column, and when the fourth set of specific pressure value is consistent with the preset closing code of the valve of the pressure-controlled electric switch valve 24 positioned at the middle position, the valve of the pressure-controlled electric switch valve 24 is controlled to be closed.
The pressure in the pipe column is set to be a fifth set of specific pressure value by the ground pump, when the fifth set of specific pressure value is consistent with the preset opening code of the valve of the pressure-controlled electric switch valve 24 positioned at the uppermost position, the valve of the pressure-controlled electric switch valve 24 is controlled to be opened, so that the oil layer 4 at the uppermost position is communicated with the oil pipe 3, and the staff can measure the performance and yield data of the oil layer 4.
If the oil layer 4 cannot be produced by self-injection or the oil layer 4 needs to be produced by non-self-injection, a pump core 222 is put into a pump seat 221 of the hydraulic jet pump 22 from a wellhead, the hydraulic jet pump 22 is started to produce the oil layer 4, and the performance and yield data of the oil layer 4 are measured.
The pump core 222 is fished out, the pressure in the pipe column is set to be a sixth set of specific pressure value by pressing the pipe column again, and when the sixth set of specific pressure value is consistent with the preset closing code of the valve of the pressure-controlled electric switch valve 24 positioned at the uppermost position, the valve of the pressure-controlled electric switch valve 24 is controlled to be closed.
The foregoing is illustrative of the present invention and is not to be construed as limiting the scope of the invention, but rather as various modifications, equivalent arrangements, improvements, etc. within the spirit and principles of the present invention.
Claims (9)
1. A multi-layer combined oil testing method adopts a multi-layer combined oil testing device and is characterized in that,
the multi-layer combined oil testing device comprises: a perforating string (1) and a test tubing string (2), wherein,
the perforating string (1) comprises a first positioning nipple (11), a circulating valve (12), an ignition device (13) and at least three perforating guns (14), wherein the first positioning nipple (11) is suitable for determining the position of the perforating string (1), the upper end of the first positioning nipple (11) is connected with an oil pipe (3), the lower end of the first positioning nipple (11) is connected with the upper end of the circulating valve (12), the circulating valve (12) is suitable for communicating the inside of a well with the oil pipe (3), the lower end of the circulating valve (12) is connected with the upper end of the ignition device (13), the lower end of the ignition device (13) is connected with the upper end of the perforating gun (14) positioned at the uppermost position, each perforating gun (14) in the at least three perforating guns (14) is used for shooting an oil layer with the depth corresponding to that of the perforating gun, and a detonating cord (16) is connected between adjacent perforating guns (14);
the oil testing pipe column (2) comprises a second positioning nipple (21), at least two packers (23) and at least three voltage-controlled electric switch valves (24), the second positioning nipple (21) is suitable for determining the position of the oil testing pipe column (2), the upper end of the second positioning nipple (21) is connected with an oil pipe (3), the lower end of the second positioning nipple (21) is connected with the upper end of the voltage-controlled electric switch valve (24) positioned at the uppermost position, one packer (23) is connected between adjacent voltage-controlled electric switch valves (24), and each voltage-controlled electric switch valve (24) in the at least three voltage-controlled electric switch valves (24) is used for controlling the communication between an oil layer corresponding to the depth of the oil layer and the oil pipe (3);
the multi-layer combined oil testing method comprises the following steps:
lowering the perforating string (1) to a first preset position in the well, wherein the first preset position refers to the position when each perforating gun (14) is aligned with an oil layer corresponding to the depth of the perforating gun;
detonating the at least three perforating guns (14), and shooting an oil layer corresponding to the depth of each perforating gun (14);
lifting out the perforating string (1) and scraping the inner wall of the well;
lowering the oil testing pipe column (2) to a second preset position in the well, wherein the second preset position refers to the position when each pressure-controlled electric switch valve (24) is aligned to an oil layer corresponding to the depth of the pressure-controlled electric switch valve;
setting all packers (23), opening a voltage-controlled electric switch valve (24) each time, and producing oil from corresponding oil layers to obtain output data of each oil layer, wherein the at least three voltage-controlled electric switch valves (24) are opened each time according to the sequence from bottom to top;
said opening of one pressure controlled electrically operated switch valve (24) at a time comprises:
the method comprises the steps of controlling pressure in a pipe column through a ground pump, changing the pressure value in the pipe column, setting the pressure in the pipe column to be a first group of specific pressure values, and controlling to open a target voltage-controlled electric switch valve (24) when the first group of specific pressure values are consistent with a preset opening code of the target voltage-controlled electric switch valve (24), so as to obtain yield data of a target oil layer corresponding to the depth of the target voltage-controlled electric switch valve (24);
changing the pressure value in the pipe column again, setting the pressure in the pipe column as a second group of specific pressure values, and controlling to close the target voltage-controlled electric switch valve (24) when the second group of specific pressure values are consistent with a preset closing code of the target voltage-controlled electric switch valve (24);
the oil test pipe column (2) further comprises a hydraulic jet pump (22), the hydraulic jet pump (22) comprises a pump seat (221) and a pump core (222), and the pressure-controlled electric switch valve (24) is opened each time, and the oil test pipe column further comprises:
if the target oil layer cannot be produced by self-injection or the target oil layer needs to be produced by non-self-injection, the pump core (222) is put into the pump seat (221) from a wellhead, and the hydraulic jet pump (22) is started to produce the target oil layer;
after the pressure-controlled electric switching valve (24) is closed, the pump core (222) is taken out.
2. The multi-layer joint operation oil testing method according to claim 1, wherein the lowering the perforating string (1) to a first preset position in a well comprises:
and adjusting the perforating string (1) to the first preset position according to the measurement result by measuring the position of the first positioning nipple (11).
3. The multi-layer combined oil testing method according to claim 1, wherein said detonating said at least three perforating guns (14), firing by each perforating gun (14) an oil layer corresponding to the depth at which it is located comprises:
and detonating the ignition device (13) so that the perforating gun (14) at the uppermost position shoots an oil layer corresponding to the depth of the perforating gun, and then detonating the detonating cord (16), detonating other perforating guns (14) except the perforating gun (14) at the uppermost position in the at least three perforating guns (14) by the detonating cord (16), and shooting the oil layer corresponding to the depth of each perforating gun (14).
4. The multi-layer joint operation oil testing method according to claim 1, wherein the lowering the oil testing pipe column (2) to a second preset position in a well comprises:
and adjusting the oil test pipe column (2) to the second preset position according to the measurement result by measuring the position of the second positioning nipple (21).
5. The multi-layer combined operation oil testing method according to claim 1, wherein the perforating string (1) further comprises a connecting oil pipe (15), adjacent perforating guns (14) are connected through the connecting oil pipe (15), the detonating cord (16) is located in the connecting oil pipe (15), and the connecting oil pipe (15) is connected with each perforating gun (14) through threads.
6. The multi-layer combined oil test method according to claim 1, wherein the ignition device (13) is adapted to detonate the perforating gun (14) located at the uppermost position, and the detonating cord (16) is adapted to detonate other perforating guns (14) of the at least three perforating guns (14) than the perforating gun (14) located at the uppermost position.
7. The multi-layer joint operation oil testing method according to claim 1, wherein the oil testing pipe column (2) further comprises a hydraulic jet pump (22), the hydraulic jet pump (22) comprises a pump seat (221) and a pump core (222), and when the oil layer cannot be produced by self-injection or the oil layer needs to be produced by non-self-injection, the pump core (222) is put into the pump seat (221) to start the hydraulic jet pump (22) so as to enable the oil layer to produce oil.
8. The multi-layer combined oil testing method according to claim 7, wherein the upper end of the hydraulic jet pump (22) is connected with the lower end of the second positioning nipple (21) through threads, and the lower end of the hydraulic jet pump (22) is connected with the upper end of the uppermost packer (23) through threads.
9. The multi-layer combined oil testing method according to claim 7, wherein the oil testing pipe column (2) further comprises a plug (25), and the plug (25) is in threaded connection with the lower end of the pressure-controlled electric switch valve (24) at the lowest position.
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