CN109306857B - Selective layering perforation oil testing tubular column and method - Google Patents
Selective layering perforation oil testing tubular column and method Download PDFInfo
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- 238000012360 testing method Methods 0.000 title claims abstract description 75
- 238000011042 selective layering Methods 0.000 title claims description 3
- 238000000034 method Methods 0.000 title abstract description 14
- 230000005540 biological transmission Effects 0.000 claims abstract description 15
- 238000010304 firing Methods 0.000 claims description 28
- 239000006096 absorbing agent Substances 0.000 claims description 10
- 230000035939 shock Effects 0.000 claims description 10
- 230000004913 activation Effects 0.000 abstract description 8
- 238000010276 construction Methods 0.000 abstract description 5
- 239000012530 fluid Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000010008 shearing Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- XQCFHQBGMWUEMY-ZPUQHVIOSA-N Nitrovin Chemical compound C=1C=C([N+]([O-])=O)OC=1\C=C\C(=NNC(=N)N)\C=C\C1=CC=C([N+]([O-])=O)O1 XQCFHQBGMWUEMY-ZPUQHVIOSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001960 triggered effect Effects 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
- 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
- E21B43/11—Perforators; Permeators
- E21B43/116—Gun or shaped-charge perforators
- E21B43/1185—Ignition systems
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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
- E21B47/00—Survey of boreholes or wells
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Abstract
The invention discloses a selective layered perforation oil testing tubular column and a method. This tubular column includes: the packer, set up the upper ignition head below the packer, set up the upper perforating gun below the upper ignition head, set up the lower ignition head below the upper perforating gun, set up the lower perforating gun below the lower ignition head, the upper pressure pipe that the upper end communicates with annular space of oil jacket located above the packer, the underpart connects with inside of the upper ignition head; the upper end of the lower pressure transmission pipe is communicated with the upper pressure transmission pipe, and the lower end of the lower pressure transmission pipe is communicated with the interior of the lower ignition head; the upper ignition head can ignite and detonate the upper perforating gun under a first preset starting pressure, and the lower ignition head can ignite and detonate the lower perforating gun under a second preset starting pressure; the first and second preset activation pressures are different. By adopting the tubular column, layered oil testing can be realized by one-time tubular column, and the sequence of the production layers for oil testing can be selected at will according to actual needs, so that the construction period is effectively shortened, and the cost is reduced.
Description
Technical Field
The invention relates to the technical field of oil and gas exploitation, in particular to a selective layered perforation oil testing tubular column and a method.
Background
In the oil and gas exploitation process, oil testing needs to be carried out on an oil and gas well so as to obtain relevant data such as the liquid production capacity, pressure, temperature, liquidity and the like of an oil and gas reservoir. In the oil testing process of the oil-gas well, because mutual interference exists between production zones of different production fluid types and different pressure systems, and the contribution of each production zone to the whole production fluid capability is different, in order to more accurately obtain the data such as the production fluid capability of the oil-gas zone, the condition of each production zone needs to be respectively researched by adopting a layered oil testing method.
The existing layered oil testing adopts a method of testing oil layer by layer and sealing up and returning, namely, according to the sequence from bottom to top, perforating is carried out on a casing at a position corresponding to a production layer, a flow channel of formation fluid and a shaft is established, and thus the data of the liquid production capacity of the production layer and the like are collected. After the data of the production zone is collected, a bridge plug (or a dust plug) is put in to seal the production zone. And repeating the steps, and testing the rest production layers.
In the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art: in the existing layered oil testing method, a pipe column needs to be pulled down and a bridge plug (or an ash plug) needs to be put in for many times, so that the existing layered oil testing method has long construction period and high cost, and the existing layered oil testing method can only test oil of each production zone according to the sequence from bottom to top and cannot select the sequence of the production zones.
Disclosure of Invention
In order to solve the technical problems, the invention provides a selective layered perforation oil testing tubular column which can realize layered oil testing by one tubular column and can randomly select the sequence of production layers for oil testing, and a selective layered perforation oil testing method based on the tubular column.
Specifically, the method comprises the following technical scheme:
in a first aspect, an embodiment of the present invention provides a selective layered perforation test oil string, where the string is disposed in a casing, and the string includes:
the packer is a set of one-way valves,
an upper ignition head arranged below the packer,
an upper perforating gun arranged below the upper ignition head,
a lower firing head disposed below the upper perforating gun,
a lower perforating gun disposed below the lower firing head,
the upper end of the upper pressure pipe is communicated with an oil sleeve annulus above the packer, and the lower end of the upper pressure pipe is communicated with the inside of the upper ignition head;
the upper end of the lower pressure transmission pipe is communicated with the upper pressure transmission pipe, and the lower end of the lower pressure transmission pipe is communicated with the inside of the lower ignition head;
the upper firing head may fire and detonate the upper perforating gun at a first preset firing pressure, and the lower firing head may fire and detonate the lower perforating gun at a second preset firing pressure;
the first and second preset activation pressures are different.
Further, when the upper ignition head is detonated first, the first preset starting pressure is smaller than the second preset starting pressure; when the lower ignition head is detonated first, the first preset starting pressure is greater than the second preset starting pressure.
Further, the tubular string still includes: the packer comprises a positioning short section, wherein the upper end of the positioning short section is connected with a well head through an oil pipe, and the lower end of the positioning short section is connected with the upper end of the packer through an oil pipe.
Further, the tubular string still includes: and the upper end of the shock absorber is connected with the lower end of the packer.
Further, the tubular string still includes: the upper end of the sieve tube is connected with the lower end of the shock absorber through an oil pipe, and the lower end of the sieve tube is connected with the upper end of the upper perforating gun.
Further, the tubular string still includes: the perforating gun comprises a pressure relief device connected with the lower end of the lower perforating gun and a plug connected with the lower end of the pressure relief device.
Further, the upper ignition head and the lower ignition head are shockproof ignition heads.
In a second aspect, an embodiment of the present invention provides a selective layered perforation test oil method, which is implemented by the above selective layered perforation test oil tubular column, and includes the following steps:
step a, putting the selective layered perforation oil testing pipe column into a well, and setting the packer;
b, enabling the pressure of the oil sleeve annulus to reach a first preset starting pressure of an upper ignition head or a second preset starting pressure of a lower ignition head, enabling the upper ignition head or the lower ignition head to ignite and ignite the upper perforating gun or the lower perforating gun, carrying out perforation production calculation on a production layer corresponding to the upper perforating gun or the lower perforating gun, and obtaining production data of the production layer corresponding to the upper perforating gun or the lower perforating gun;
c, enabling the pressure of the oil sleeve annulus to reach the preset starting pressure of the ignition head which is not ignited in the step b, enabling the ignition head which is not ignited in the step b to ignite the corresponding perforating gun, carrying out commingled production and yield calculation on the production layers corresponding to the upper perforating gun and the lower perforating gun, and obtaining the data of the sum of the yields of the production layers corresponding to the upper perforating gun and the lower perforating gun;
and d, subtracting the yield data of the stratum corresponding to the perforating gun detonated in the step b from the yield sum data acquired in the step c to obtain the yield data of the stratum corresponding to the perforating gun detonated in the step c.
Further, before the step a, the method further comprises:
determining the sequence of perforation and oil testing of the production layer corresponding to the upper perforating gun and the production layer corresponding to the lower perforating gun;
and determining the magnitude relation between the first preset starting pressure and the second preset starting pressure according to the perforation oil testing sequence, wherein if the production layer corresponding to the upper perforating gun is subjected to perforation oil testing first, the first preset starting pressure is smaller than the second preset starting pressure, and if the production layer corresponding to the lower perforating gun is subjected to perforation oil testing first, the first preset starting pressure is larger than the second preset starting pressure.
The technical scheme provided by the embodiment of the invention has the beneficial effects that:
in the selective layered perforation oil testing tubular column provided by the embodiment of the invention, the upper ignition head and the lower ignition head respectively have different preset starting pressures, and the pressure of the oil sleeve annulus is transmitted to the ignition head by controlling the pressure of the oil sleeve annulus through the pressure transmission pipe. During the in-service use, can control the pressure of oil jacket annular space earlier for the preset starting pressure of arbitrary one in upper ignition head and the lower ignition head, make one of them ignition head dotting to detonating the perforation gun that corresponds, later ask to produce and obtain output data to the production zone that should be detonated the perforation gun corresponds. And then, controlling the pressure of the oil sleeve annulus to be the preset starting pressure of the other ignition head, igniting the oil sleeve annulus and detonating the corresponding perforating gun, performing joint production on the production layers corresponding to the two perforating guns to obtain the data of the sum of the yields of the two production layers, and subtracting the data of the yield of the production layer corresponding to the perforating gun which is detonated firstly from the sum of the yields to obtain the data of the yield of the production layer corresponding to the perforating gun which is detonated later.
Therefore, by adopting the selective layered perforation oil testing tubular column provided by the embodiment of the invention, layered oil testing can be realized by adopting one tubular column, the sequence of the production zones for oil testing can be randomly selected according to actual needs, the construction period of layered oil testing is effectively shortened, the cost is reduced, the yield data of each production zone can be more accurately obtained, and the selective layered perforation oil testing tubular column has very important significance for the exploration and development of oil and gas fields.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a selectively stratified perforating test oil pipe column provided by an embodiment of the invention.
The reference numerals in the drawings denote:
1-well head;
2-oil pipe;
3-sleeving a pipe;
4-positioning the short section;
5-uploading a pressure transmission pipe;
6-a packer;
7-a sieve tube;
8-upper ignition head;
9-lower pressure transmission pipe;
10-installing a perforating gun;
11-a shock absorber;
12-lower ignition head;
13-lower perforating gun;
14-a pressure relief device;
15-plug.
Detailed Description
In order to make the technical solutions and advantages of the present invention clearer, the following will describe embodiments of the present invention in further detail with reference to the accompanying drawings. Unless defined otherwise, all technical terms used in the examples of the present invention have the same meaning as commonly understood by one of ordinary skill in the art.
In a first aspect, an embodiment of the present invention provides a selective zonal perforation test tubing string disposed in a casing, and referring to fig. 1, the tubing string includes:
the packer (6) is set in a position,
an upper ignition head 8 arranged below the packer 6,
an upper perforating gun 10 disposed below the upper firing head 8,
a lower firing head 12 disposed below the upper perforating gun 10,
a lower perforating gun 13 disposed below the lower firing head 12,
an upper pressure pipe 5 with the upper end communicated with the oil sleeve annulus above the packer 6 and the lower end communicated with the inside of the upper ignition head 8;
and a lower pressure transmission pipe 9 with the upper end communicated with the upper pressure transmission pipe 5 and the lower end communicated with the interior of the lower ignition head 12;
the upper firing head 8 may ignite and fire the upper perforating gun 10 at a first preset firing pressure, and the lower firing head 12 may ignite and fire the lower perforating gun 13 at a second preset firing pressure;
the first and second preset activation pressures are different.
In the selective layered perforation test oil pipe column provided by the embodiment of the invention, the pressure of the oil sleeve annulus is transmitted to the upper ignition head 8 and the lower ignition head 12 through the upper pressure transmission pipe 5 and the lower pressure transmission pipe 9, and when the pressure of the oil sleeve annulus is the first preset starting pressure of the upper ignition head 8 or the second preset starting pressure of the lower ignition head 12, the corresponding ignition head is ignited to detonate the corresponding perforating gun, so that the production layer corresponding to the perforating gun is perforated. Because the first preset starting pressure of the upper ignition head 8 and the second preset starting pressure of the lower ignition head 12 are different, only one ignition head can be ignited and the corresponding perforating gun can be detonated by pressurizing the oil sleeve annulus each time.
Based on the above, in actual use, the pressure of the oil jacket annulus can be controlled to be the preset starting pressure of any one of the upper ignition head 8 and the lower ignition head 12, so that one of the ignition heads is ignited, the corresponding perforating gun is detonated, and then the production layer corresponding to the detonated perforating gun is subjected to production calculation to obtain the production data. And then, controlling the pressure of the oil sleeve annulus to be the preset starting pressure of the other ignition head, igniting the oil sleeve annulus and detonating the corresponding perforating gun, performing joint production on the production layers corresponding to the two perforating guns to obtain the data of the sum of the yields of the two production layers, and subtracting the data of the yield of the production layer corresponding to the perforating gun which is detonated firstly from the sum of the yields to obtain the data of the yield of the production layer corresponding to the perforating gun which is detonated later.
For example, when the production zone corresponding to the upper perforating gun 10 (i.e., the production zone a in the figure) is perforated and evaluated, the pressure of the oil jacket annulus is controlled to be the first preset starting pressure of the upper ignition head 8, the upper ignition head 8 is ignited, the upper perforating gun 10 is ignited, and the perforation and production are carried out on the production zone a, so that the production data of the production zone a are obtained. And then, controlling the pressure of the oil sleeve annulus to be the second preset starting pressure of the lower ignition head 12, igniting the lower ignition head 12, detonating the lower perforating gun 13, and performing joint production on the production zone A and the production zone B to obtain the data of the sum of the yields of the production zone A and the production zone B. And subtracting the yield data of the producing zone A from the sum data of the yields of the producing zone A and the producing zone B to obtain the yield data of the producing zone B.
Therefore, by adopting the selective layered perforation oil testing tubular column provided by the embodiment of the invention, layered oil testing can be realized by adopting one tubular column, the sequence of the production zones for oil testing can be randomly selected according to actual needs, the construction period of layered oil testing is effectively shortened, the cost is reduced, the yield data of each production zone can be more accurately obtained, and the selective layered perforation oil testing tubular column has very important significance for the exploration and development of oil and gas fields.
It will be understood by those skilled in the art that the first preset activation pressure of the upper igniter 8 and the second preset activation pressure of the lower igniter 12 mean that the upper igniter 8 can be ignited only when the pressure reaches the first preset activation pressure, the lower igniter 12 can be ignited only when the pressure reaches the second preset activation pressure, and neither of the ignitions can be ignited if the pressure is less than or greater than the preset activation pressure.
For an ignition head applied in the field of oil and gas exploitation, a firing piston and a detonator are usually arranged in the ignition head, when the pressure acting on the firing piston is larger than the shearing force of a shearing pin locking the firing piston, the shearing pin is sheared, and the firing piston moves downwards to impact the detonator, so that the detonator is detonated and the ignition is completed. A valve which can be opened only under specific pressure (namely, the valve which is larger than or smaller than the specific pressure cannot be opened) can be arranged in the ignition head, and when the valve is opened, the pressure can act on the shearing pin, so that the piston is triggered to impact the detonator to finish ignition.
The specific values of the first preset starting pressure of the upper ignition head 8 and the second preset starting pressure of the lower ignition head 12 are not strictly limited in the embodiment of the present invention as long as they are different from each other. The preset starting pressure value can be set according to the condition of the corresponding pay zone.
Further, preferably, the magnitude relation between the first preset starting pressure and the second preset starting pressure is determined according to the sequence of carrying out perforation oil testing, and the preset starting pressure of the ignition head corresponding to the production layer which carries out perforation oil testing firstly is set to be a smaller value. Specifically, when perforating and oil testing are performed on a production layer corresponding to the upper perforating gun 10, the upper ignition head 8 is detonated first, and the first starting pressure is smaller than the second preset starting pressure, that is, the upper ignition head 8 adopts an ignition head with a smaller preset starting pressure; when the production layer corresponding to the lower perforating gun 13 is perforated and tested, the lower ignition head 12 is detonated first, the first starting pressure is greater than the second preset starting pressure, and the upper ignition head 8 adopts the ignition head with the larger preset starting pressure. By adopting the design, the layered oil testing can be carried out according to the preset sequence, the problem that the ignition head with smaller preset starting pressure is also detonated in the process of detonating the ignition head with larger preset starting pressure can be avoided,
further, referring to fig. 1, the selectively perforating test oil string in accordance with the present invention further includes a positioning nipple 4, a screen 7, a shock absorber 11, a pressure relief device 14, and a plug 15, specifically:
the upper end of the positioning short section 4 is connected with a wellhead 1 through an oil pipe 2, and the lower end of the positioning short section 4 is connected with the upper end of a packer 6 through an oil pipe;
the upper end of the shock absorber 11 is connected with the lower end of the packer 6;
the upper end of the sieve tube 7 is connected with the lower end of the shock absorber 11 through an oil pipe, the lower end of the sieve tube 7 is connected with the upper end of the upper perforating gun 10, and the upper ignition head 8 is arranged inside the sieve tube 7;
the plug 15 is connected to the lower end of the pressure relief device 14.
The upper perforating gun 10 and the lower perforating gun 13 are connected through an oil pipe, and the lower ignition head 12 is arranged inside the oil pipe connecting the upper perforating gun 10 and the lower perforating gun 13.
In the embodiment of the invention, the upper ignition head 8 and the lower ignition head 12 both adopt shockproof ignition heads.
The specific connection mode of the upper ignition head 8 and the lower ignition head 12 with the upper perforating gun 10 and the lower perforating gun 13 is not particularly limited in the embodiments of the present invention, and the conventional technical means in the field can be adopted.
Bypass joints may be provided on the tubing between the locating sub 4 and the packer 6, on the screen 7 and between the shock absorber 11 and the lower perforating gun 13 to connect the upper and lower pressure transfer tubes 5 and 9, respectively.
In a second aspect, an embodiment of the present invention provides a selective layered perforation test oil method, which is implemented by the above selective layered perforation test oil tubular column, and includes the following steps:
and a, putting the selective layered perforation oil testing pipe column into the underground, and setting the packer 6.
And b, enabling the pressure of the oil sleeve annulus to reach a first preset starting pressure of the upper ignition head 8 or a second preset starting pressure of the lower ignition head 12, enabling the upper ignition head 8 or the lower ignition head 12 to ignite and ignite the upper perforating gun 10 or the lower perforating gun 13, carrying out perforation on a production layer corresponding to the upper perforating gun 10 or the lower perforating gun 13, and obtaining the production data of the production layer corresponding to the upper perforating gun 10 or the lower perforating gun 13.
And c, enabling the pressure of the oil sleeve annulus to reach the preset starting pressure of the ignition head which is not ignited in the step b, igniting the corresponding perforating gun, performing commingled production on the production layers corresponding to the upper perforating gun 10 and the lower perforating gun 13, and obtaining the sum of the production layers corresponding to the upper perforating gun 10 and the lower perforating gun 13.
And d, subtracting the yield of the stratum corresponding to the perforating gun detonated in the step b from the sum of the yields obtained in the step c to obtain the yield of the stratum corresponding to the perforating gun detonated in the step c.
According to the above, based on the selective layered perforation oil testing method of the selective layered perforation oil testing tubular column provided by the first aspect of the embodiment of the invention, layered oil testing can be realized by one-time tubular column, and the sequence of the production zones for oil testing can be selected, so that the construction period of layered oil testing is effectively shortened, the cost is reduced, the yield data of each production zone can be more accurately obtained, and the method has a very important significance for exploration and development of oil and gas fields.
Further, in the selective stratified perforation oil testing method provided by the embodiment of the present invention, before step a, the method further includes the following steps: firstly, the sequence of perforating and oil testing of the production zone corresponding to the upper perforating gun 10 and the production zone corresponding to the lower perforating gun 13 is determined, and specifically, which production zone is perforated for production can be determined according to geological requirements.
Then, determining the magnitude relation between the first preset starting pressure and the second preset starting pressure according to the sequence of perforation oil testing, if perforation oil testing is carried out on a production layer corresponding to the upper perforating gun 10, the first preset starting pressure is smaller than the second preset starting pressure, namely the upper ignition head 8 adopts an ignition head with smaller preset starting pressure; if perforation oil testing is performed on the production layer corresponding to the lower perforating gun 13, the first preset starting pressure is greater than the second preset starting pressure, namely, the upper ignition head 8 adopts an ignition head with a larger preset starting pressure.
In addition, in the embodiment of the invention, after the packer 6 is set, the step of testing the qualified seal is further included, so that the smooth proceeding of the subsequent layered oil testing is ensured.
The above description is only for facilitating the understanding of the technical solutions of the present invention by those skilled in the art, and is not intended to limit the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A selective layering perforation test oil pipe column is arranged in a casing, and is characterized by comprising:
the packer (6) is positioned below the packer (6), and an oil sleeve annulus is directly communicated with two production layers;
an upper ignition head (8) arranged below the packer (6),
an upper perforating gun (10) arranged below the upper ignition head (8),
a lower firing head (12) disposed below the upper perforating gun (10),
a lower perforating gun (13) arranged below the lower firing head (12),
the upper end of the upper pressure pipe (5) is communicated with the oil sleeve annulus above the packer (6), and the lower end of the upper pressure pipe is communicated with the inside of the upper ignition head (8);
and a lower pressure transmission pipe (9) with the upper end communicated with the upper pressure transmission pipe (5) and the lower end communicated with the interior of the lower ignition head (12);
the upper firing head (8) is capable of firing and detonating the upper perforating gun (10) at a first preset firing pressure, and the lower firing head (12) is capable of firing and detonating the lower perforating gun (13) at a second preset firing pressure;
the first preset starting pressure and the second preset starting pressure are different;
determining the magnitude relation between the first preset starting pressure and the second preset starting pressure according to the sequence of perforation oil testing, wherein when the upper ignition head (8) is detonated first, the first preset starting pressure is smaller than the second preset starting pressure; when the lower ignition head (12) is detonated first, the first preset starting pressure is greater than the second preset starting pressure.
2. The selectively zonable perforation testing string of claim 1, further comprising: the packer comprises a positioning short section (4), wherein the upper end of the positioning short section (4) is connected with the wellhead (1) through an oil pipe, and the lower end of the positioning short section (4) is connected with the upper end of the packer (6) through the oil pipe.
3. The selectively zonable perforation testing string of claim 1, further comprising: a shock absorber (11), wherein the upper end of the shock absorber (11) is connected with the lower end of the packer (6).
4. The selectively zonable perforation testing string of claim 3, further comprising: the upper end of the screen pipe (7) is connected with the lower end of the shock absorber (11) through an oil pipe, and the lower end of the screen pipe (7) is connected with the upper end of the upper perforating gun (10).
5. The selectively zonable perforation testing string of claim 1, further comprising: the perforating gun comprises a pressure relief device (14) connected with the lower end of the lower perforating gun (13) and a plug (15) connected with the lower end of the pressure relief device (14).
6. The selectively stratified perforation testing string as claimed in any one of claims 1 to 5, wherein the upper firing head (8) and the lower firing head (12) are shock-proof firing heads.
7. A selective layered perforation oil testing method, which is implemented by the selective layered perforation oil testing tubular column as claimed in any one of claims 1 to 6, and comprises the following steps:
determining the sequence of perforating and oil testing of a production layer corresponding to the upper perforating gun (10) and a production layer corresponding to the lower perforating gun (13), wherein oil sleeve annuluses corresponding to the two production layers below the packer (6) are communicated;
determining the magnitude relation between the first preset starting pressure and the second preset starting pressure according to the perforation oil testing sequence, wherein if the production layer corresponding to the upper perforation gun (10) is subjected to perforation oil testing, the first preset starting pressure is smaller than the second preset starting pressure, and if the production layer corresponding to the lower perforation gun (13) is subjected to perforation oil testing, the first preset starting pressure is larger than the second preset starting pressure;
step a, putting the selective layered perforation oil testing pipe column into a well, and setting the packer (6);
b, enabling the pressure of the oil sleeve annulus to reach a first preset starting pressure of an upper ignition head (8) or a second preset starting pressure of a lower ignition head (12), enabling the upper ignition head (8) or the lower ignition head (12) to ignite and detonate the upper perforating gun (10) or the lower perforating gun (13), carrying out perforation production calculation on a production layer corresponding to the upper perforating gun (10) or the lower perforating gun (13), and obtaining production data of the production layer corresponding to the upper perforating gun (10) or the lower perforating gun (13);
c, enabling the pressure of the oil sleeve annulus to reach the preset starting pressure of the ignition head which is not ignited in the step b, enabling the ignition head which is not ignited in the step b to ignite the corresponding perforating gun, carrying out commingled production and yield calculation on the production layers corresponding to the upper perforating gun (10) and the lower perforating gun (13), and obtaining the data of the sum of the yields of the production layers corresponding to the upper perforating gun (10) and the lower perforating gun (13);
and d, subtracting the yield data of the stratum corresponding to the perforating gun detonated in the step b from the yield sum data acquired in the step c to obtain the yield data of the stratum corresponding to the perforating gun detonated in the step c.
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| CN110630225A (en) * | 2019-09-26 | 2019-12-31 | 中国石油天然气集团有限公司 | Same-layer meshing perforation method and device |
| CN112664178A (en) * | 2020-12-31 | 2021-04-16 | 核工业北京地质研究院 | Underground fixing device and method for drilling layered test sensor |
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