CN111155992A - Multilayer combined operation oil testing device and method - Google Patents
Multilayer combined operation oil testing device and method Download PDFInfo
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- CN111155992A CN111155992A CN201811319759.0A CN201811319759A CN111155992A CN 111155992 A CN111155992 A CN 111155992A CN 201811319759 A CN201811319759 A CN 201811319759A CN 111155992 A CN111155992 A CN 111155992A
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- 238000012360 testing method Methods 0.000 title claims abstract description 110
- 238000000034 method Methods 0.000 title claims abstract description 13
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- 210000002445 nipple Anatomy 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 claims description 15
- 238000005259 measurement Methods 0.000 claims description 13
- 238000010304 firing Methods 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 6
- 238000010998 test method Methods 0.000 claims 1
- 239000003129 oil well Substances 0.000 description 11
- 238000003825 pressing Methods 0.000 description 6
- 238000012856 packing Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
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- 238000004880 explosion Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
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- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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 oil exploitation, and provides a multilayer combined operation oil testing device and method. The device comprises a perforating string (1) and a test oil string (2), wherein the perforating string (1) comprises a first positioning short section (11) connected with an oil pipe (3), a circulating valve (12) connected with the lower end of the first positioning short section (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 a detonating cord (16) is connected between the adjacent perforating guns (14); the test oil pipe column (2) comprises a second positioning short section (21) connected with the oil pipe (3), at least two packers (23) connected with the second positioning short section (21) and at least three pressure-controlled electric switch valves (24), and one packer (23) is connected between the adjacent pressure-controlled electric switch valves (24). The perforating pipe column can complete multi-layer perforation in one time, and the oil testing pipe column can complete layered oil testing operation in one time.
Description
Technical Field
The invention relates to the technical field of oil exploitation, in particular to a multilayer combined operation oil testing device and method.
Background
In the production process of oil and gas wells in oil fields, the formations of different liquid production types and different pressure systems interfere with each other, all the production layers contribute different to the whole liquid production capacity, and the general oil testing is difficult to obtain the productivity, liquidity, pressure recovery curve and other data of all the small layers, so that the oil testing conclusion and the accuracy and the qualification of the reservoir are influenced, and therefore, the stratified oil testing becomes the most direct and reliable yield calculation method in oil reservoir development and an important means for knowing the oil production, the water production and the pressure of all the oil layers.
The present one-time tubular column that adopts accomplishes the layering oil testing operation technique, can once the tubular column realize the layering perforation on two layers, transfer the tubular column to preset position in the well, accomplish the oil testing operation back on two layers of producing zones that correspond, pour into the killing fluid and carry out the killing with the producing zone that the oil testing was accomplished, transfer the tubular column once more, accomplish the oil testing operation on two layers of producing zones that correspond, go on in proper order all to accomplish the oil testing operation on all producing zones in the well.
In the implementation process of the invention, the inventor finds that the prior art has at least the following problems: the one-trip tubular column that adopts at present accomplishes the layering oil testing operation technique, the layering perforation or the oil testing operation of two layers can only be realized to one-trip tubular column, but face the multilayer oil well more than two layers, need take off the tubular column many times and carry out layering perforation and oil testing operation in proper order, the construction cycle is long, the expense is high, and go on in step when going on in addition to the oil testing operation of two layers reservoir among the prior art, the output data in the different reservoir is different, can influence the oil conclusion inaccurate, still need to kill the well before putting the tubular column again in addition, kill the well many times causes the reservoir pollution easily.
Disclosure of Invention
In view of this, the embodiment of the present application provides a multilayer combined operation oil testing device and method, which complete a layered oil testing operation on a multilayer oil layer with one trip of a tubular column, and the specific technical scheme is as follows:
a first aspect of an embodiment of the present application provides a multilayer joint-operation oil testing device, including: a perforation pipe column and a test oil pipe column, wherein,
the perforating string comprises a first positioning short section, a circulating valve, an ignition device and at least three perforating guns, wherein the first positioning short section is suitable for determining the position of the perforating string, the upper end of the first positioning short section is connected with an oil pipe, the lower end of the first positioning short section is connected with the upper end of the circulating valve, the circulating valve is suitable for communicating 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 perforating gun of the at least three perforating guns is used for shooting an oil layer corresponding to the depth of the perforating gun, and a detonating cord is connected between the adjacent perforating guns;
the oil testing pipe column comprises a second positioning short section, at least two packers and at least three voltage-controlled electric switch valves, wherein the second positioning short section is suitable for determining the position of the oil testing pipe column, the upper end of the second positioning short section is connected with an oil pipe, the lower end of the second positioning short section is connected with the upper end of the voltage-controlled electric switch valve located at the uppermost position, a packer is connected between every two 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 the oil layer corresponding to the depth of the oil testing pipe and the oil pipe.
Optionally, the perforating string further comprises a connecting oil pipe, the adjacent perforating guns are connected by the connecting oil pipe, the detonating cord is located in the connecting oil pipe, and the connecting oil pipe is in threaded connection with each perforating gun.
Optionally, the ignition device is adapted to detonate the uppermost positioned perforating gun, and the detonating cord is adapted to detonate the other perforating guns of the at least three perforating guns except the uppermost positioned perforating gun.
Optionally, the test string further comprises a hydraulic jet pump, the hydraulic jet pump comprises a pump base 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 thrown into the pump base to start the hydraulic jet pump so that the oil layer produces oil.
Optionally, the upper end of the hydraulic jet pump is in threaded connection with the lower end of the second positioning nipple, and the lower end of the hydraulic jet pump is in threaded connection with the upper end of the uppermost packer.
Optionally, the test oil string 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 an embodiment of the present application provides a multilayer joint-production oil testing method, including:
putting the perforating pipe column into a first preset position in the well, wherein the first preset position refers to the position of each perforating gun aligned to 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;
the perforating pipe column is pulled out, and the inner wall of the well is scraped;
putting the oil testing pipe column into a second preset position in the well, wherein the second preset position refers to the position of each pressure-controlled electric switch valve aligned with the oil layer corresponding to the depth of the pressure-controlled electric switch valve;
and setting all packers, and opening one voltage-controlled electric switch valve every time to enable the corresponding oil layer to produce oil and obtain the yield data of each oil layer, wherein the at least three voltage-controlled electric switch valves are opened one at a time according to the sequence from bottom to top.
Optionally, the lowering the perforating string to a first predetermined location in the well comprises:
and adjusting the perforating string to the first preset position by detecting the position of the first positioning short joint and according to the measurement result.
Optionally, said detonating said at least three perforating guns, and said firing each perforating gun to its corresponding depth of oil layer comprises:
and detonating the ignition device to ensure that the perforating gun at the uppermost position shoots the oil layer corresponding to the depth of the perforating gun at the uppermost position, further detonating the detonating cord, and detonating other perforating guns except the perforating gun at the uppermost position in the at least three perforating guns by the detonating cord, wherein each perforating gun shoots the oil layer corresponding to the depth of the perforating gun at the uppermost position.
Optionally, the lowering the test tubing string to a second predetermined location in the well comprises:
and adjusting the oil testing pipe column to the second preset position by measuring the position of the second positioning short section and according to the measurement result.
Optionally, the opening one voltage-controlled electrically-operated switching valve at a time includes:
controlling the pressure in the tubular column through a ground pump, changing the pressure value in the tubular column, setting the pressure in the tubular column to be a first group of specific pressure values, and controlling to open the target pressure-controlled electric switch valve when the first group of specific pressure values is consistent with a preset opening code of the target pressure-controlled electric switch valve, so as to obtain the yield data of a target oil layer corresponding to the depth of the target pressure-controlled electric switch 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 pressure-controlled electric switch valve when the second group of specific pressure values is consistent with a preset closing code of the target pressure-controlled electric switch valve.
Optionally, the test oil string further includes a hydraulic jet pump, the hydraulic jet pump includes a pump base and a pump core, and the opening of the pressure-controlled electric switch valve each time further includes:
if the target oil layer corresponding to the depth of the target pressure-controlled electric switch valve cannot be subjected to self-blowout production or the target oil layer needs to be subjected to non-self-blowout production, the pump core is put into the pump seat from a wellhead, and the hydraulic jet pump works to enable the target oil layer to be produced;
and after the target pressure control electric switch valve is closed, taking out the pump core.
The technical scheme provided by the embodiment of the application has the beneficial effects that at least:
the position of each perforation gun is confirmed to the perforation tubular column accessible of multilayer combined operation oil test device that this application embodiment provided, guarantee that each perforation gun all aims at the oil reservoir that its depth of place corresponds, the perforation gun that is located the top position is detonated by ignition, and then detonate the detonating cord, by the perforating gun that detonating index explodes other positions, make each perforation gun all shoot the oil reservoir that its depth of place corresponds, thereby can accomplish the perforation operation of multilayer oil reservoir by one time the perforation tubular column, and the circulating valve of this perforation tubular column can guarantee the intercommunication with oil pipe in the well. After the perforation is accomplished, the perforation tubular column is played out, the oil test tubular column is put down again, this oil test tubular column can confirm the position of each voltage-controlled electric switch valve through second location nipple joint, ensure that each voltage-controlled electric switch valve aims at the oil reservoir that its place degree of depth corresponds, connect a packer between the adjacent voltage-controlled electric switch valve, open all packers, seal the oil well into several parts according to the position that the oil reservoir was located, when guaranteeing that each voltage-controlled electric switch valve opens alone, its well section that locates is in encapsulated situation, ensure the accuracy of the output data of acquireing every oil reservoir, can accomplish through this oil test tubular column and seal each oil reservoir in order to acquire the output data of every oil reservoir alone, the efficiency of carrying out layering oil test to the oil well has been improved. And the perforation tubular column and the oil testing tubular column have simple structures and convenient operation.
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 below.
FIG. 1 is a schematic structural diagram of a perforating string of a multi-layer combined-operation oil testing device provided by an embodiment of the application;
fig. 2 is a schematic structural diagram of a test oil pipe column of a multi-layer combined test oil device provided in an embodiment of the present application;
FIG. 3 is a schematic structural diagram of a hydrajet pump in a test string provided in an embodiment of the present application;
fig. 4 is a flowchart of a multi-layer co-production oil testing method provided in an embodiment of the present application.
The reference numerals in the drawings denote:
1-perforating tubular column; 11-a first positioning nipple; 12-circulation valve; 13-an ignition device; 131-an ignition head; 14-a perforating gun; 15-connecting an oil pipe; 16-a detonating cord;
2-testing the oil pipe column; 21-a second positioning nipple; 22-a hydraulic jet pump; 221-a pump mount; 222-a pump core; 23-a packer; 231-a rubber cylinder; 24-a pressure controlled electric switch valve; 25-plug;
3, oil pipe;
4-oil layer.
Detailed Description
The multilayer combined oil testing device provided by the embodiment of the application comprises a perforation tubular column and an oil testing tubular column. The perforating string comprises a first positioning short section, a circulating valve, an ignition device and at least three perforating guns, wherein the first positioning short section is suitable for determining the position of the perforating string, the upper end of the first positioning short section is connected with an oil pipe, the lower end of the first positioning short section is connected with the upper end of the circulating valve, the circulating valve is suitable for communicating the 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 perforating gun in the at least three perforating guns is used for ejecting an oil layer corresponding to the depth of the perforating gun, and a detonating cord; the oil testing pipe column comprises a second positioning short section, at least two packers and at least three pressure-controlled electric switch valves, the second positioning short section is suitable for determining the position of the oil testing pipe column, the upper end of the second positioning short section is connected with the oil pipe, the lower end of the second positioning short section is connected with the upper end of the pressure-controlled electric switch valve located at the uppermost position, a packer is connected between adjacent pressure-controlled electric switch valves, and each pressure-controlled electric switch valve in the at least three pressure-controlled electric switch valves is used for controlling the communication between an oil layer corresponding to the depth of the oil testing pipe and the oil pipe.
The position of each perforation gun is confirmed to the perforation tubular column accessible of multilayer combined operation oil test device that this application embodiment provided, guarantee that each perforation gun all aims at the oil reservoir that its depth of place corresponds, the perforation gun that is located the top position is detonated by ignition, and then detonate the detonating cord, by the perforating gun that detonating index explodes other positions, make each perforation gun all shoot the oil reservoir that its depth of place corresponds, thereby can accomplish the perforation operation of multilayer oil reservoir by one time the perforation tubular column, and the circulating valve of this perforation tubular column can guarantee the intercommunication with oil pipe in the well. After the perforation is accomplished, the perforation tubular column is played out, the oil test tubular column is put down again, this oil test tubular column can confirm the position of each voltage-controlled electric switch valve through second location nipple joint, ensure that each voltage-controlled electric switch valve aims at the oil reservoir that its place degree of depth corresponds, connect a packer between the adjacent voltage-controlled electric switch valve, open all packers, seal the oil well into several parts according to the position that the oil reservoir was located, when guaranteeing that each voltage-controlled electric switch valve opens alone, its well section that locates is in encapsulated situation, ensure the accuracy of the output data of acquireing every oil reservoir, can accomplish through this oil test tubular column and seal each oil reservoir in order to acquire the output data of every oil reservoir alone, the efficiency of carrying out layering oil test to the oil well has been improved. And the perforation tubular column and the oil testing tubular column have simple structures and convenient operation.
In order to make the technical solutions and advantages of the present invention clearer, the following will describe embodiments of the present application in further detail with reference to the accompanying drawings.
The embodiment of the application provides a multilayer combined operation oil testing device, which comprises a perforation tubular column 1 and an oil testing tubular column 2.
Referring to fig. 1, the perforating string 1 comprises a first positioning sub 11, a circulating valve 12, an ignition device 13 and at least three perforating guns 14, the first positioning sub 11 is suitable for determining the position of the perforating string 1, the upper end of the first positioning sub 11 is connected with the oil pipe 3, the lower end of the first positioning sub 11 is connected with the upper end of the circulating valve 12, the lower end of the circulating valve 12 is connected with the upper end of the ignition device 13, and the circulating valve 12 is suitable for communicating the well with the oil pipe 3.
For example, in the embodiment of the present application, the first positioning sub 11 may be a short oil pipe, the length of the first positioning sub 11 is short, so that the specific position of the whole first positioning sub 11 can be conveniently measured, during the process of lowering the whole perforating string 1 into the well, the position of each perforating gun 14 can be obtained by measuring the position of the first positioning sub 11, the upper end of the first positioning sub 11 is connected with the oil pipe 3, the lower end of the first positioning sub is connected with the upper end of the circulating valve 12, the circulating valve 12 may be a three-nozzle type circulating valve 12, that is, the circulating valve 12 includes an upper port, a lower port and a side port, the upper port and the lower port form a main path, the main path is communicated with the oil pipe 3 through the first positioning sub 11, the side port is a bypass, the main path and the bypass of the circulating valve 12 are communicated, the well can be communicated with the oil pipe 3 through the, so that the pressure in the well is consistent with the atmospheric pressure.
Referring to fig. 1, the lower end of the circulating valve 12 is connected to the upper end of an ignition device 13, the lower end of the ignition device 13 is connected to the upper end of the perforating gun 14 located at the uppermost position, each perforating gun 14 of at least three perforating guns 14 is used for perforating the oil layer 4 corresponding to the depth of the perforating gun, and a detonating cord 16 is connected between the adjacent perforating guns 14.
In the present embodiment, the ignition device 13 is adapted to detonate the uppermost perforating gun 14. For example, the inner cavity of the ignition device 13 may include an ignition head 131, and in one implementation of the embodiment of the present application, the ignition head 131 may be detonated by means of a firing rod to ignite the perforating gun 14 connected to the ignition device 13 at the uppermost position, so that the perforating gun 14 shoots the oil layer 4 corresponding to the depth of the perforating gun 14. Of course, the present application is not limited thereto, and in other embodiments of the present application, the ignition head 131 may be ignited by pressurizing the inner cavity of the ignition device 13, or the ignition head 131 may be ignited by connecting to a ground power source to use electric energy, so as to ignite the perforating gun 14, so that the perforating gun 14 shoots the oil layer 4 corresponding to the depth of the perforating gun 14.
The detonating cord 16 is adapted to detonate the perforating guns 14 other than the uppermost perforating gun 14 of the at least three perforating guns 14.
For example, when the perforating string 1 comprises at least three perforating guns 14, the detonating cord 16 is connected between the adjacent perforating guns 14, so that only one ignition device 13 is connected to the upper end of the perforating gun 14 at the uppermost position, after the ignition device 13 is initiated, the perforating gun 14 connected with the ignition device 13 at the uppermost position is detonated, and then each perforating gun 14 is detonated through the detonating cord 16 between the adjacent perforating guns 14, and each perforating gun 14 shoots the oil layer 4 corresponding to the depth of the perforating gun 14.
Referring to fig. 1, the perforating string 1 can further comprise a connecting oil pipe 15, adjacent perforating guns 14 are connected by the connecting oil pipe 15, a detonating cord 16 is positioned in the connecting oil pipe 15, and the connecting oil pipe 15 is in threaded connection with each perforating gun 14.
For example, in the embodiment of the present application, the adjacent perforating guns 14 can be connected through the connecting oil pipe 15, the detonating cord 16 is placed in the connecting oil pipe 15, on one hand, the length of the connecting oil pipe 15 is determined, the position of each perforating gun 14 of the perforating string 1 can be obtained through the known length data of the connecting oil pipe 15 and the measurement of the position of the first locating sub 11, and the perforating string 1 is conveniently adjusted so that each perforating gun 14 is aligned with the oil layer 4; on the other hand, the explosion wire 16 is placed in the connecting oil pipe 15 to protect the explosion wire 16 better. In addition, the perforating gun 14 and the connecting oil pipe 15 can be connected through threads, although the application is not limited to the method, 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, a plug may be attached to the lower end of the lowermost perforating gun 14 in order to prevent impurities, etc. from entering the perforating gun 14 during its operation and affecting the operation of the perforating gun 14. Of course, the present application is not limited thereto, and in other embodiments, the perforating string 1 can be plugged in other reasonable manners or by other components.
For example, in the present embodiment, the components of the perforating string 1 can be connected by threads, and the components can be connected by connecting tubing 15 according to the actual depth of each layer 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 can be connected by other reasonable means, and other reasonable connecting components can be connected between the components.
Referring to fig. 2, the test oil string 2 includes a second positioning sub 21, at least two packers 23 and at least three voltage-controlled electric switch valves 24, the second positioning sub 21 is adapted to determine the position of the test oil string 2, the upper end of the second positioning sub 21 is connected to the oil pipe 3, the lower end is connected to the upper end of the voltage-controlled electric switch valve 24 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 of 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 packer and the oil pipe 3.
For example, in this application embodiment, second location nipple joint 21 of formation testing tubular column 2 can be the same with first location nipple joint 11 of perforation tubular column 1, for one section short oil pipe, second location nipple joint 21's length is shorter, conveniently measures the concrete position of whole second location nipple joint 21, when transferring whole formation testing tubular column 2 in the well, conveniently measures this second location nipple joint 21's position 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 controlling voltage electric switch valve 24 and oil pipe 3 intercommunication, and packing element 231 is suitable for packing in the well when expanding, when all packers 23 are whole to expand, can be several parts with the position seal that the oil well was located according to oil reservoir 4 to conveniently acquire the output data of each oil reservoir 4. In one implementation of the embodiment of the present application, the packer 23 may be expanded by increasing the hydraulic pressure to seal the oil well, although the expansion of the packer 23 is not limited in this application, and in other implementations of the embodiment of the present application, the rubber sleeve 231 may be expanded by mechanically pressing the rubber sleeve 231 to seal the oil well, or other reasonable ways may be used to seal the oil well.
For example, one packer 23 may be connected between adjacent pressure-controlled electric switch valves 24, and referring to fig. 2, in order to save resources, the upper end of the pressure-controlled electric switch valve 24 located at the uppermost position may not be connected to the packer 23, and likewise, the lower end of the pressure-controlled electric switch valve 24 located at the lowermost position may not be connected to the packer 23. 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 24 and the oil pipe 3, when one voltage-controlled electric switch valve 24 is opened, namely the oil layer 4 corresponding to the depth of the voltage-controlled electric switch valve is communicated with the oil pipe 3, and meanwhile, other voltage-controlled electric switch valves 24 are in a closed state, the yield data of the corresponding oil layer 4 can be obtained, and the influence of other oil layers 4 is avoided.
For example, in the embodiment of the present application, each of the voltage-controlled electrically-operated switch valves 24 may include an upper port and a lower port, and one side-opened port, where the upper port and the lower port of the voltage-controlled electrically-operated switch valve 24 form a main path and ensure that the main path is communicated, and 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 of the voltage-controlled electrically-operated switch valves 24 are set in advance and ensure that the opening code and the closing code of each of the voltage-controlled electrically-operated switch valves 24 are. Through the change of the pressure in the ground pump control tubular column, set up the pressure in the tubular column into first specific pressure value of group, when this pressure value of group was unanimous with the preset opening code of a certain voltage-controlled electric switch valve 24, can control this voltage-controlled electric switch valve 24's valve and open to make the oil reservoir 4 that this voltage-controlled electric switch valve 24 place degree of depth corresponds communicate with oil pipe 3, thereby can obtain the output data of this oil reservoir 4. And (3) pressurizing through a surface pump again to change the pressure value in the pipe column, resetting the pressure value in the pipe column to be a second group of specific pressure values, and controlling the pressure-controlled electric switch valve 24 to be closed when the second group of pressure values is consistent with the closing code of the pressure-controlled electric switch valve 24.
Referring to fig. 2, in the embodiment of the present application, the test string 2 may further include a hydrajet pump 22, and the hydrajet pump 22 may include a pump seat 221 and a pump core 222, and when the target oil layer 4 cannot be produced by self-injection or non-self-injection of the target oil layer 4 is required, the pump core 222 is thrown into the pump seat 221 to start the hydrajet pump 22 so that the target oil layer 4 produces oil.
For example, in the embodiment of the present application, referring to fig. 3, the pump seat 221 of the hydrajet pump 22 may have a stepped inner cavity, and the pump core 222 may have an inverted trapezoidal shape corresponding to the inner cavity of the pump seat 221, so as to ensure that the inner cavities of the entire test string 2 are not required to be put into the pump core 222 when the oil layer 4 can be produced by self-injection or the oil layer 4 needs to be produced by self-injection. When the oil layer 4 can not be produced by self-spraying or the oil layer 4 needs to be produced by non-self-spraying, 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, and the pump core 222 drives the hydraulic jet pump 22 to work, so that the oil layer 4 can be produced, and after the yield data of the oil layer 4 is obtained, the pump core 222 is fished out by pulling down a steel wire. Of course, the present application is not so limited and in other embodiments, backwashing or other suitable means may be employed to remove the pump core 222.
In the embodiment of the present application, the upper end of the hydraulic jet pump 22 may be threadedly connected to the second positioning sub 21, and the lower end may be threadedly connected to the upper end of the uppermost packer 23. Of course, the present application is not limited to this, 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 sub 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 test oil string 2 may further include a plug 25, an upper end of the plug 25 may be connected to a lower end of the pressure-controlled electric switch valve 24 at the lowest position through a thread, and a 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 then the lower end of the whole test oil string 2 is plugged, and it is ensured that in the test oil process, the communication between the oil layer 4 and the oil pipe 3 is controlled only through the pressure-controlled electric switch valve 24, and it is avoided that the leakage of oil results in inaccurate acquired output data of the oil layer 4. Of course, the present application is not limited to this, and in other embodiments, the lower end of the lowest pressure-controlled electric switch valve 24 may be blocked in other reasonable manners.
The embodiment of the application also provides a multilayer combined oil testing method, and referring to fig. 4, the multilayer combined oil testing method performed by using the oil testing device comprises the following steps:
and S1, lowering the perforating string 1 to a first preset position in the well, wherein the first preset position refers to the position of each perforating gun 14 aligned with the oil layer 4 corresponding to the depth of the perforating gun.
For example, in the embodiment of the present application, before the oil testing operation is performed, the oil layer 4 of the target oil well is detected, the position of the oil layer 4 in the oil well is measured, and the oil layer 4 corresponding to the depth at which each perforating gun 14 is aligned is the first preset position. This ensures that each perforating gun 14 is accurate in firing the corresponding oil reservoir 4.
This step may include adjusting the perforating string 1 to a first preset position by measuring the position of the first locating sub 11 and by the measurement.
For example, in this application embodiment, the length of first locating sub 11 is shorter, conveniently measure the concrete position of whole first locating sub 11, in the actual operation process, can be comparatively accurate convenient measurement first locating sub 11's position, and circulating valve 12, ignition 13, each perforation gun 14 and the length of connecting oil pipe 15 are all certain, consequently the position of each perforation gun 14 is known to the concrete position of first locating sub 11 of accessible measurement, and then adjust perforation tubular column 1 to first preset position through the measuring result, make each perforation gun 14 all aim at the oil reservoir 4 that its depth corresponds.
And S2, detonating at least three perforating guns 14 in the perforating string 1, and shooting out the oil layer 4 corresponding to the depth of each perforating gun 14.
This step may include firing the ignition device 13 so that the uppermost perforating gun 14 fires the oil layer 4 corresponding to the depth of the uppermost perforating gun, and firing the detonating cord 16 so that the detonating cord 16 fires the other perforating guns 14 in the perforating string 1 except the uppermost perforating gun 14, and each perforating gun 14 fires the oil layer 4 corresponding to the depth of the uppermost 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 to the ignition device 13, and the detonating cord 16 is connected between the adjacent perforating guns 14, so that after the ignition device 13 is ignited, the perforating gun 14 located at the uppermost position is ignited to shoot the oil layer 4 corresponding to the depth of the uppermost position, and after the perforating gun 14 located at the uppermost position is ignited, the subsequent perforating gun 14 is further ignited by the detonating cord 16 between the perforating guns 14, and the oil layer 4 corresponding to the depth of each perforating gun 14 is further shot, that is, all the perforating guns 14 are ignited to shoot all the oil layers 4.
And S3, pulling 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 reservoir 4 is perforated by using the perforating string 1, the perforating string 1 is pulled out, the test oil string 2 is replaced, and in order to ensure the packing effect of the packer 23 of the test oil string 2, before the test oil string 2 is lowered, the inner wall of the well is repeatedly scraped, especially the well section corresponding to the oil reservoir and the well section corresponding to the setting position of each packer 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 test oil pipe column 2 to a second preset position in the well, wherein the second preset position refers to the position of each pressure-controlled electric switch valve 24 aligned with the oil layer 4 corresponding to the depth of the pressure-controlled electric switch valve.
This step may include adjusting the test string 2 to a second predetermined position by measuring the position of the second locating sub 21 and according to the measurement.
In this application embodiment, after scraping repeatedly to the well inner wall, transfer test oil pipe column 2, second location nipple joint 21 on test oil pipe column 2 is the same with the effect of first location nipple joint 11 on the perforation tubular column 1, the accessible measures the position of second location nipple joint 21 and obtains the position of each pressure-controlled electric switch valve 24, and adjust this test oil pipe column 2 to the second preset position through measuring result, even make the port that the side of each pressure-controlled electric switch valve 24 was opened all aim at the oil reservoir 4 that its depth corresponds.
And S5, setting all the packers 23, and opening one pressure-controlled electric switch valve 24 at a time to enable the corresponding oil layer 4 to produce oil, and obtaining the production data of each oil layer 4, wherein the pressure-controlled electric switch valve 24 in the test oil pipe column 2 opens one pressure-controlled electric switch valve 24 at a time according to the sequence from bottom to top.
This step may include:
controlling the pressure in the tubular column by a ground pump, setting the pressure in the tubular column to be a first group of specific pressure values by changing the pressure values in the tubular column, and controlling to open the target pressure-controlled electric switch valve 24 when the first group of specific pressure values is consistent with a preset opening code of the target pressure-controlled electric switch valve 24 so as to obtain the yield data of the target oil layer 4 corresponding to the depth of the pressure-controlled electric switch;
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 pressure-controlled electric switch valve 24 when the second group of specific pressure values is consistent with a preset closing code of the target pressure-controlled electric switch valve 24.
The step may further include:
if the target oil layer 4 corresponding to the depth of the target voltage-controlled electric switch cannot be produced by self-injection or the target 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 well head, and the hydraulic jet pump 22 works to produce the target oil layer 4;
after the target voltage-controlled electric switch valve 24 is closed, the pump core 222 is taken out, wherein the opening code and the closing code of each voltage-controlled electric switch valve 24 are different.
For example, in the present embodiment, after the test string 2 is lowered to the second preset position, all packers 23 are set, the well is divided into several parts according to the positions of all oil layers 4 by the packers 23, and the side-open port of each pressure-controlled electric switch valve 24 is aligned with the oil layer 4 corresponding to the depth of the side-open port.
The pressure in the tubular column is controlled by a ground pump, the pressure value in the tubular column is changed, the pressure in the tubular column is set to be a first group of specific pressure values, for example, the pressure in the tubular column is maintained at a specific value by the ground pump, after a certain time interval, the pressure value in the tubular column is changed, a certain time is maintained, the pressure value in the tubular column is changed again, a certain time is maintained, the first group of specific pressure values are formed by reciprocating in sequence, when the first group of specific pressure values is consistent with the preset opening code of the target voltage-controlled electric switch valve 24, the valve opened at the side 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 then a worker can measure the performance and the oil production data of the target.
And after the measurement of the yield data and the performance of the target oil layer 4 is finished, changing the pressure value in the pipe column again, setting the pressure value in the pipe column as a second group of specific pressure values, and controlling the valve opened at the side of the target pressure-controlled electric switch valve 24 to be closed when the second group of specific pressure values is 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 when 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 hydrajet pump 22 from the wellhead, and the hydrajet pump 22 may be started to further produce the target oil layer 4, thereby facilitating the measurement. After the pump core 222 is taken out, the pressure-controlled electric switch valve 24 corresponding to the target oil layer 4 is controlled to be closed.
Taking three oil layers as an example, the multilayer combined oil testing device and the multilayer combined oil testing method can be applied to more layers of oil testing operation. The steps of using the oil testing device to test oil are as follows:
firstly, according to the distribution of three oil layers, a perforating string 1 comprising three perforating guns 14 is placed downwards, the interval between every two perforating guns 14 is set according to the interval of every oil layer 4, and the position of a first positioning short joint 11 is measured and the whole perforating string 1 is adjusted to a first preset position according to the measurement result.
The firing head 131 of the igniter 13 is detonated to fire the perforating gun 14 located at the uppermost position, the perforating gun 14 fires the corresponding oil layer 4 located at the uppermost position, the perforating gun 14 located at the intermediate position is detonated by the detonating cord 16 to fire the corresponding oil layer 4 located at the intermediate position, and finally the perforating gun 14 located at the lowermost position is detonated by the detonating cord 16 to fire the oil layer 4 located at the lowermost position.
And after all three oil layers are jetted, the perforating tubular column 1 is pulled out, and a well cleaner is lowered to scrape the inner wall of the well.
After scraping is qualified, setting intervals between the pressure-controlled electric switch valves 24 according to the intervals between the oil layers 4, placing 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 into the well, and presetting the second preset position of the oil testing pipe column 2 by measuring the position of the second positioning nipple 21 and according to the measuring result.
All of the packers 23 are then expanded so that all of the packers 23 are perfectly seated against the borehole wall.
The pressure in the pipe column is set to be a first group of specific pressure values by applying pressure to the inside of the pipe column through a surface pump, and 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 located 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 a worker 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 the pump seat 221 of the hydraulic jet pump 22 from the well head, the hydraulic jet pump 22 is started to produce the oil layer, and the performance and the yield data of the oil layer are measured.
And (4) fishing out the pump core 222, re-pressing the pipe column to set the pipe column internal pressure to be a second group of specific pressure values, and controlling the valve closing of the pressure-controlled electric switch valve 24 when the second group of specific pressure values are consistent with the valve preset closing code of the pressure-controlled electric switch valve 24 positioned at the lowest position.
Next, the pressure in the pipe column is set to a third group of specific pressure values by applying pressure to the inside of the pipe column through a surface pump, and when the third group of specific pressure values are consistent with a preset opening code of a valve of the pressure-controlled electric switch valve 24 located 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 a worker can measure 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 the pump seat 221 of the hydraulic jet pump 22 from the well head, the hydraulic jet pump 22 is started to produce the oil layer 4, and the performance and the yield data of the oil layer 4 are measured.
And (4) fishing out the pump core 222, setting the pressure in the pipe column to be a fourth group of specific pressure values by hoping to press the pipe column again, and controlling the valve of the pressure-controlled electric switch valve 24 to be closed when the fourth group of specific pressure values are consistent with the preset valve closing code of the pressure-controlled electric switch valve 24 positioned at the middle position.
The pressure in the pipe column is set to be a fifth group of specific pressure values by applying pressure to the inside of the pipe column through a surface pump, when the fifth group of specific pressure values is consistent with a preset opening code of a 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 a worker can measure 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 the pump seat 221 of the hydraulic jet pump 22 from the well head, the hydraulic jet pump 22 is started to produce the oil layer 4, and the performance and the yield data of the oil layer 4 are measured.
And (4) fishing out the pump core 222, re-pressing the pressure in the pipe column to set the pressure in the pipe column to be a sixth group of specific pressure values, and controlling the valve closing of the pressure-controlled electric switch valve 24 when the sixth group of specific pressure values are consistent with the preset valve closing codes of the pressure-controlled electric switch valve 24 positioned at the uppermost position.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (12)
1. The utility model provides a multilayer allies oneself with and makes oil test device which characterized in that includes: a perforation pipe column (1) and a test oil pipe column (2), wherein,
the perforating string (1) comprises a first positioning short joint (11), a circulating valve (12), an ignition device (13) and at least three perforating guns (14), the first locating sub (11) is adapted to determine the position of the perforating string (1), the upper end of the first positioning short section (11) is connected with the oil pipe (3), the lower end of the first positioning short section (11) is connected with the upper end of the circulating valve (12), the circulating valve (12) is suitable for communicating the well with an 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) of the at least three perforating guns (14) is used for shooting an oil layer corresponding to the depth of the perforating gun, and a detonating cord (16) is connected between every two adjacent perforating guns (14);
the oil testing pipe column (2) comprises a second positioning short section (21), at least two packers (23) and at least three pressure-controlled electric switch valves (24), the second positioning short section (21) is suitable for determining the position of the oil testing pipe column (2), the upper end of the second positioning short section (21) is connected with the oil pipe (3), the lower end of the second positioning short section (21) is connected with the upper end of the pressure-controlled electric switch valve (24) located at the uppermost position, one packer (23) is connected between every two adjacent pressure-controlled electric switch valves (24), and each pressure-controlled electric switch valve (24) in the at least three pressure-controlled electric switch valves (24) is used for controlling the communication between the oil layer corresponding to the depth where the packer is located and the oil pipe (3).
2. The multi-layer combined operation oil testing device according to claim 1, characterized in that the perforating string (1) further comprises a connecting oil pipe (15), the adjacent perforating guns (14) are connected by the connecting oil pipe (15), the detonating cord (16) is positioned in the connecting oil pipe (15), and the connecting oil pipe (15) is in threaded connection with each perforating gun (14).
3. The multi-layer combined working test oil device according to claim 1, characterized in that 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 the perforating guns (14) other than the perforating gun (14) located at the uppermost position among the at least three perforating guns (14).
4. The multi-layer combined operation oil testing device as claimed in claim 1, wherein the oil testing string (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 needs to be produced by non-self-injection, the pump core (222) is thrown into the pump seat (221) to start the hydraulic jet pump (22) to produce oil in the oil layer.
5. The multi-layer combined operation oil testing device as claimed in claim 4, wherein the upper end of the hydraulic jet pump (22) is in threaded connection with the lower end of the second positioning nipple (21), and the lower end of the hydraulic jet pump (22) is in threaded connection with the upper end of the uppermost packer (23).
6. The multi-layer combined operation oil testing device as claimed in claim 4, wherein the oil testing string (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.
7. A multilayer combined oil testing method, which adopts the multilayer combined oil testing device of any one of claims 1 to 6, and is characterized by comprising the following steps:
the perforating pipe column (1) is lowered to a first preset position in the well, wherein the first preset position refers to the position of each perforating gun (14) when being aligned with an oil layer corresponding to the depth of the perforating gun;
detonating the at least three perforating guns (14), and shooting out an oil layer corresponding to the depth of each perforating gun (14);
the perforating pipe column (1) is lifted out, and the inner wall of the well is scraped;
the oil testing pipe column (2) is lowered to a second preset position in the well, wherein the second preset position refers to the position of each pressure-controlled electric switch valve (24) when being aligned with an oil layer corresponding to the depth of the pressure-controlled electric switch valve;
and setting all the packers (23), and opening the voltage-controlled electric switch valves (24) one time to enable the corresponding oil layers to produce oil, and obtaining the production data of each oil layer, wherein the at least three voltage-controlled electric switch valves (24) open the voltage-controlled electric switch valves (24) one time according to the sequence from bottom to top.
8. The multi-layer combined production testing method according to claim 7, wherein the lowering of the perforating string (1) to a first preset position in the well comprises:
the position of the first positioning short joint (11) is measured, and the perforation tubular column (1) is adjusted to the first preset position according to the measurement result.
9. The multi-layer combined production testing method according to claim 7, wherein the firing of the at least three perforating guns (14) to shoot out the oil layer corresponding to the depth of each perforating gun (14) comprises:
and (3) igniting the ignition device (13), so that the perforating gun (14) at the uppermost position shoots the oil layer corresponding to the depth of the perforating gun at the uppermost position, further igniting the detonating cord (16), and igniting the 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), wherein each perforating gun (14) shoots the oil layer corresponding to the depth of the perforating gun at the uppermost position.
10. The multi-layer combined operation test method as claimed in claim 7, wherein the lowering of the test string (2) to a second preset position in the well comprises:
and adjusting the oil testing pipe column (2) to the second preset position by measuring the position of the second positioning nipple (21) and according to the measurement result.
11. The multi-layer linkage oil testing method according to claim 7, wherein the opening of the voltage-controlled electric switch valve (24) one at a time comprises:
controlling the pressure in the tubular column through a ground pump, changing the pressure value in the tubular column, setting the pressure in the tubular column to be a first group of specific pressure values, and controlling to open the target pressure-controlled electric switch valve (24) when the first group of specific pressure values is consistent with a preset opening code of the target pressure-controlled electric switch valve (24) so as to obtain the yield data of a target oil layer corresponding to the depth of the target pressure-controlled electric switch valve (24);
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 pressure-controlled electric switch valve (24) when the second group of specific pressure values is consistent with a preset closing code of the target pressure-controlled electric switch valve (24).
12. The multi-layer linkage oil testing method according to claim 11, wherein the oil testing string (2) further comprises a hydraulic jet pump (22), the hydraulic jet pump (22) comprises a pump base (221) and a pump core (222), and the method opens the pressure-controlled electric switch valve (24) one at a time, and further comprises:
if the target oil layer cannot be produced by self-injection or needs to be produced by non-self-injection, the pump core (222) is thrown into the pump seat (221) from a wellhead, and the hydraulic jet pump (22) is started to produce the target oil layer;
and after the pressure-controlled electric switch valve (24) is closed, the pump core (222) is taken out.
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