CN112360434A - Method for judging and identifying water-resisting oil production effect - Google Patents
Method for judging and identifying water-resisting oil production effect Download PDFInfo
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- CN112360434A CN112360434A CN202011441695.9A CN202011441695A CN112360434A CN 112360434 A CN112360434 A CN 112360434A CN 202011441695 A CN202011441695 A CN 202011441695A CN 112360434 A CN112360434 A CN 112360434A
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- 230000000694 effects Effects 0.000 title claims abstract description 58
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000000605 extraction Methods 0.000 claims abstract description 38
- 230000029058 respiratory gaseous exchange Effects 0.000 claims abstract description 35
- 239000003129 oil well Substances 0.000 claims abstract description 25
- 238000005086 pumping Methods 0.000 claims abstract description 11
- 238000002955 isolation Methods 0.000 claims abstract description 10
- 238000005065 mining Methods 0.000 claims abstract description 9
- 230000033001 locomotion Effects 0.000 claims abstract description 6
- 239000010408 film Substances 0.000 claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 230000000737 periodic effect Effects 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 7
- 239000012528 membrane Substances 0.000 claims description 3
- 239000010409 thin film Substances 0.000 claims description 2
- 239000002985 plastic film Substances 0.000 abstract description 22
- 229920006255 plastic film Polymers 0.000 abstract description 22
- 239000008398 formation water Substances 0.000 description 5
- 238000011084 recovery Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
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- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000033558 biomineral tissue development Effects 0.000 description 1
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- 239000004033 plastic Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
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Abstract
The invention provides a method for judging and identifying a water-resisting oil production effect, which comprises the following steps: s1, keeping normal production of an oil production isolation well; s2, opening an oil sleeve annulus gate, and emptying sleeve air; s3, installing a water-resisting oil extraction effect identification device at an annular outlet of the oil sleeve; s4, judging the setting effect of the packer by using the water-resisting oil extraction effect judging device; and S5, recovering the original flow of the oil sleeve annulus to finish identification. According to the invention, whether the plastic film has a corresponding breathing phenomenon or not is observed along with the reciprocating motion of the up-down stroke of the pumping unit, and if the breathing phenomenon is not obvious, the packer has a good water-proof oil extraction setting effect and does not have a leakage condition. If the plastic film obviously has a breathing phenomenon, the packer is not sealed tightly by the mining and setting, and a leakage condition exists. The method realizes the judgment of the setting effect of the water-resisting oil extraction packer on the premise of not moving the pipe column and not stopping the well, and the judgment has almost no cost and risk and has no influence on the normal production of the oil well.
Description
Technical Field
The invention belongs to the technical field of oil and gas exploitation, and particularly relates to a method for judging and identifying a water-resisting oil production effect.
Background
In the process of oil field development, along with the extension of the production time of an oil well, part of oil well casing pipes are gradually damaged and destroyed due to the reasons of measure operation acidizing fracturing, production layer fluid corrosion, formation stress change and the like, once the casing pipes have the problem of breakage and leakage, external formation water can enter a shaft through a sleeve breakage point to flow back into the formation, the water content of the oil well rises, the productivity is influenced, even the production layer is polluted, the near-wellbore region is blocked, and the productivity of the oil well is further reduced. At present, aiming at the problems, the most common treatment means is to adopt a packer to carry out water-isolated oil extraction, and if the water content of an oil well is obviously reduced and the productivity is rapidly improved, the effect of the water-isolated oil extraction treatment can be shown; if the productivity of the oil well is not recovered and the water content is not reduced, the packer setting failure or the oil well is still in a liquid drainage stage or the treatment is not effective due to formation water, and the packer setting condition needs to be further judged. However, the existing method for judging the setting condition of the packer for separate production only adopts a mode of water injection by a reverse circulation pump of a pump truck for verification, namely after the well is stopped, the pump truck is used for pumping in from the annular space of an oil sleeve (the pumping displacement is 200L/min, the time is not less than 30min), the liquid return condition of an oil pipe at the well mouth is observed, if liquid return exists, the packer can be considered to be invalid in sealing, and if liquid return does not exist, the packer can be considered to be good in sealing. The method has complex process, needs to stop the well and then use a pump truck, and has higher cost.
In addition, the most common simple method at present is to test the formation water, judge whether the sleeve breaks the water or the formation water according to the water type, if the sleeve breaks the water, the packer is ineffective for separate mining, but the method is limited by the liquid discharge condition of the oil well, if the liquid poured into the shaft reversely is not discharged, the misjudgment can be caused, and in addition, if the sleeve breaks the water and the formation water are consistent in type, and the mineralization degree is also similar, the judgment can not be carried out.
Therefore, a method capable of rapidly judging the setting condition of the water-proof oil extraction packer is needed to further improve the effectiveness and timeliness of casing fracture oil well treatment.
Disclosure of Invention
Aiming at the problems in the prior art, the invention designs a simple water-resisting oil extraction effect identification method, which can quickly identify whether the setting of the packer is effective or not under the condition of not stopping the well, and provides decision basis for later process measure making.
The technical scheme adopted by the invention is as follows:
a ground identification method for water-resisting oil extraction effect comprises the following steps:
s1, keeping normal production of an oil production isolation well, and finishing identification;
s2, opening an oil sleeve annulus gate, and emptying sleeve air;
s3, installing a water-resisting oil extraction effect identification device at an annular outlet of the oil sleeve;
s4, judging the setting effect of the packer by using the water-resisting oil extraction effect judging device;
and S5, recovering the original flow of the oil sleeve annulus.
Further, the S1 maintaining normal production of the production isolation well specifically includes: after the casing oil well adopts packer water-proof oil extraction, the production parameters such as pump diameter, stroke frequency, sinking degree and the like are kept unchanged, and when the production dynamic state is restored to be balanced and the liquid content is relatively stable, the next step can be carried out.
Further, the method for judging the setting effect of the packer in S4 is to observe the breathing state of the membrane in the water-stop oil extraction effect identification device, and judge the setting effect of the packer according to the observation result:
if the film does not have obvious periodic breathing phenomenon, the packer water-proof oil extraction setting effect is good, and the leakage condition does not exist.
If the film has obvious periodic respiration phenomenon along with the up-down stroke movement process of the pumping unit, the packer separate mining setting is not tight, and leakage exists.
Specifically, the periodic breathing phenomenon refers to the phenomenon that a film bulges or sags along with the motion process of the up-and-down stroke of the pumping unit.
Further, the device is discerned to water proof oil recovery effect includes:
the pressure plate is axially provided with a through hole;
a membrane detachably connected in the through hole;
the measuring part is detachably connected to the upper surface of the pressure plate, and the measuring end of the measuring part is vertical to the center of the upper surface of the film;
and the sealing part is fixed at the bottom end of the pressure plate.
Preferably, the pressure plate is axially provided with a circular pressure groove, the circular pressure groove is coaxial with the through hole, a pressure ring is arranged in the circular pressure groove, the pressure ring is equidistantly provided with a screw hole, a bolt is arranged in the screw hole, the pressure ring is detachably connected with the pressure plate through the bolt, and the film is clamped between the pressure ring and the pressure plate.
Preferably, the measurement unit includes: distancer, support, grip ring and set nut, one side at the pressure disk upper surface is fixed to support one end, the opposite side at the support is fixed to the grip ring, the distancer sets up in the grip ring, set nut and grip ring threaded connection, and set nut pass the grip ring and act on the distancer, the grip ring is coaxial with the through-hole of pressure disk, and the grip ring is located the pressure disk through-hole directly over.
Preferably, the sealing part comprises a rubber ring, the upper surface of the rubber ring is fixed with the lower surface of the pressure plate, and the rubber ring is coaxial with the through hole of the pressure plate.
By adopting the technical scheme, the invention has the advantages that:
1. the packer water-proof oil extraction setting device utilizes the principle that the oil pumping unit drives the piston of the oil well pump to reciprocate up and down during normal oil well production, so that the liquid level of the annular space of the oil sleeve fluctuates up and down, and the empty outlet of the oil sleeve ring has a breathing phenomenon, and if the plastic film has no obvious periodic breathing phenomenon, the packer water-proof oil extraction setting effect is good, and no leakage condition exists; if the plastic film has obvious periodic breathing phenomenon, the packer is not sealed tightly by separate mining and setting, and leakage exists. The method realizes the judgment of the setting effect of the water-resisting oil extraction packer on the premise of not moving the pipe column and not stopping the well, and the judgment has almost no cost and risk and has no influence on the normal production of the oil well.
2. The plastic film has good sealing performance, is relatively soft and has obvious reaction to the respiration phenomenon existing in the oil sleeve annular interface, so the plastic film is selected as a test material.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to clearly understand the technical solutions of the present invention and to implement the technical solutions according to the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
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 embodiments will be briefly described 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 that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of a method for identifying the effect of oil production;
FIG. 2 is a schematic structural view of the water-isolated oil recovery effect identification device;
fig. 3 is a plan view of the water-stop oil recovery effect identification device.
Description of the reference numerals
1. A platen; 2. a film; 3. pressing a ring; 4. a bolt; 5. a range finder; 6. a support; 7. a clamp ring; 8. positioning a nut; 9. a rubber ring.
Detailed Description
The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention. In addition, all the coupling/connection relationships mentioned herein do not mean that the components are directly connected, but mean that a better coupling structure can be formed by adding or reducing coupling accessories according to specific implementation conditions. The technical characteristics in the invention can be combined interactively on the premise of shield conflict without conflicting conflicts.
Example 1:
the embodiment provides a ground identification method for a water-resisting oil production effect, as shown in fig. 1, comprising the following steps:
s1, keeping normal production of an oil production isolation well;
s2, opening an oil sleeve annulus gate, and emptying sleeve air;
s3, installing a water-resisting oil extraction effect identification device at an annular outlet of the oil sleeve;
s4, judging the setting effect of the packer by using the water-resisting oil extraction effect judging device; if the packer is well set, the adopted water-resisting oil extraction treatment measures are effective, and even if the productivity of the oil well is still not recovered in the later period, the problem of failure of the oil extraction of the packer can be eliminated, so that interference factors are eliminated for further searching the reduction of the productivity of the oil well.
Example 2:
on the basis of the embodiment 1, the plastic film has good sealing performance and is relatively soft, and the reaction to the breathing phenomenon existing in the oil sleeve annular interface is obvious, so the plastic film is selected as a test material.
According to the packer, the plastic film is sleeved on the empty outlet of the oil sleeve ring, and the principle that the oil pumping unit drives the oil well pump piston to reciprocate up and down during normal oil well production is utilized, so that the liquid level of the oil sleeve ring is fluctuated up and down, and the empty outlet of the oil sleeve ring has a breathing phenomenon. If the plastic film has obvious periodic breathing phenomenon, the packer is not sealed tightly by separate mining and setting, and leakage exists.
Specifically, the method for identifying the surface of the oil production isolated effect, as shown in fig. 1, includes the following steps:
s1, maintaining normal production of oil production isolation well
After the casing oil well adopts packer water-proof oil extraction, the production parameters such as pump diameter, stroke frequency, sinking degree and the like are kept unchanged, and when the production is dynamically balanced and the liquid content is relatively stable (the daily fluctuation is not more than +/-10 percent), the next step is carried out;
s2, plastic film is sleeved on the empty outlet of the oil sleeve ring
It is worth mentioning that when the oil jacket ring is sleeved with the plastic film, the plastic film needs to be fastened by a rubber band or clenched by two hands to prevent air leakage, meanwhile, the film needs to be prevented from being fastened on the pipe opening, a certain space needs to be reserved, so that the plastic film keeps a loose state (the internal and external fluctuation range is +/-1 cm), the fastening is avoided, the sensitivity of the breathing phenomenon is improved, and the breathing phenomenon of the air outlet of the oil jacket ring is convenient to observe.
S3, observing the breathing state of the film
The most critical of the step is that the plastic film has an aperiodic respiration phenomenon when circulating along with the up-down stroke of the oil pumping unit by careful observation:
if the plastic film has no obvious periodic breathing phenomenon, the packer has good water-resisting oil extraction setting effect and does not have leakage.
If the plastic film has obvious periodic breathing phenomenon, the packer is not sealed tightly by separate mining and setting, and leakage may exist.
And S4, recovering the original flow of the oil sleeve annulus to finish identification.
Example 3:
in order to further optimize the water-resisting oil extraction effect ground identification method, the invention also provides a water-resisting oil extraction effect identification device, as shown in fig. 2, comprising:
the pressure plate 1, the pressure plate 1 has through holes axially;
the film 2, the film 2 is detachably connected in the through hole;
the measuring part is detachably connected to the upper surface of the pressure plate 1, and the measuring end of the measuring part is vertical to the center of the upper surface of the film 2;
and the sealing part is fixed at the bottom end of the pressure plate 1.
As a further optimization, the measuring section includes: distancer 5, support 6, grip ring 7 and set nut 8, one side at pressure disk 1 upper surface is fixed to support 6 one end, the opposite side at support 6 is fixed to grip ring 7, distancer 5 sets up in grip ring 7, set nut 8 and 7 threaded connection of grip ring, and set nut 8 pass grip ring 7 and act on distancer 5, grip ring 7 is coaxial with pressure disk 1's through-hole, and grip ring 7 is located pressure disk 1 through-hole directly over. The distance measuring device 5 can be replaced conveniently through the clamping ring 7, and the distance measuring device 5 can be taken out for charging through loosening the positioning nut 8.
During the use, place pressure disk 1 in oil jacket annular space exit, when placing, it is coaxial with the pit shaft to be approached to pressure disk 1 as far as possible, then starts distancer 5, compresses tightly pressure disk 1 simultaneously, when having the breathing phenomenon in the pit shaft, the phenomenon of bulging and subside can take place for film 2, simultaneously through the stroke of 2 blouses of film of 5 real-time supervision of distancer and subside, through the digital display data of distancer 5, can judge the periodic breathing phenomenon of this well head mouth film.
Example 4:
on the basis of embodiment 3, as shown in fig. 2 and 3, as a further optimization, the sealing part comprises a rubber ring 9, the upper surface of the rubber ring 9 is fixed with the lower surface of the pressure plate 1, and the rubber ring 9 is coaxial with the through hole of the pressure plate 1. The width of the inner ring to the outer ring of the rubber ring 9 can be used for measuring the inlets with different sizes in the width, and meanwhile, the tightness can be effectively kept through the rubber ring 9, so that the phenomenon of well mouth respiration observation is more obvious.
Example 5:
on embodiment 3's basis, further, as shown in fig. 3, it has circular indent to open axially on the pressure disk 1, circular indent is coaxial with the through-hole, be equipped with clamping ring 3 in the circular indent, it has the screw to open equidistance on the clamping ring 3, all be equipped with bolt 4 in the screw, clamping ring 3 passes through bolt 4 and can dismantle with pressure disk 1 and be connected, 2 centre grippings of film are between clamping ring 3 and pressure disk 1.
It should be further explained that the thin film 2 adopted by the invention is soft and sensitive to respiration, and preferably a soft preservative film or a plastic bag; a rubber film may be used, and the film 2 should be made of a material having a small light transmittance and a small refractive index.
Example 6:
the ground identification method for the water-resisting oil extraction effect provided by the embodiment comprises the following steps of:
s1, maintaining normal production of an oil production isolation well: after the casing oil well adopts packer water-proof oil extraction, the production parameters such as pump diameter, stroke frequency, sinking degree and the like are kept unchanged, and when the production is dynamically balanced and the liquid content is relatively stable, the next step is carried out;
s2, opening an oil sleeve annulus gate, emptying casing gas, namely, judging that the oil sleeve annulus needs emptying to discharge associated gas when in identification, wherein the gate is in a normally open state, and an oil well is in a continuous well opening state and the production dynamic state is recovered stably after the oil well is subjected to water-resisting oil extraction treatment;
s3, installing a water-resisting oil extraction effect identification device at the annular outlet of the oil sleeve, installing the pressure plate 1 at the annular outlet of the oil sleeve, and clamping the film 2 between the pressure ring 3 and the pressure plate 1;
s4, judge the packer setting effect through water proof oil recovery effect and discern the device, specifically do: start distancer 5, compress tightly pressure disk 1 simultaneously, when having breathing phenomenon in the pit shaft, the phenomenon that swells and caves in can take place for film 2, and the stroke that swells and caves in through distancer 5 real-time supervision film 2 simultaneously through distancer 5 digital display data, can judge accurately that this well head film has the breathing phenomenon of aperiodicity to with this discernment packer setting effect: if the plastic film has no obvious periodic breathing phenomenon, the packer has good water-resisting oil extraction setting effect and does not have leakage.
If the plastic film has obvious periodic breathing phenomenon, the packer is not sealed tightly by separate mining and setting, and leakage may exist;
and S5, recovering the original flow of the oil sleeve annulus to finish identification.
After the casing damage well finishes the water-isolated oil extraction and the production dynamic state is recovered to a stable state, the continuous production state of the oil well is kept, the oil casing annulus gate is opened, the casing gas is emptied, then the plastic film is sleeved at the oil casing ring empty port, whether the plastic film has a corresponding breathing phenomenon along with the reciprocating motion of the oil pumping unit in the up-down stroke is observed, and if the breathing phenomenon does not appear, the packer water-isolated oil extraction setting effect is good, and the leakage condition does not exist. If the plastic film obviously has a breathing phenomenon, the packer is not sealed tightly by the mining and setting, and a leakage condition exists. The method realizes the judgment and identification of the setting effect of the water-resisting oil extraction packer on the premise of not moving the pipe column and not stopping the well, has almost no cost and risk, has no influence on the normal production of the oil well, and is very simple to operate.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that many other modifications and embodiments can be devised by those skilled in the art without departing from the technical principles of the present invention, which will fall within the scope and spirit of the principles disclosed herein. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.
Claims (8)
1. A ground identification method for water-resisting oil extraction effect is characterized by comprising the following steps:
s1, keeping normal production of an oil production isolation well;
s2, opening an oil sleeve annulus gate, and emptying sleeve air;
s3, installing a water-resisting oil extraction effect identification device at an annular outlet of the oil sleeve;
s4, judging the setting effect of the packer by using the water-resisting oil extraction effect judging device;
and S5, recovering the original flow of the oil sleeve annulus to finish identification.
2. The ground identification method for the effects of oil production by water-resisting according to claim 1, wherein the step S1 is performed to keep the oil production well producing normally, and specifically comprises the steps of: after the casing oil well adopts a packer to isolate water and extract oil, the production parameters are kept unchanged, and when the production dynamic state is recovered to be balanced and the liquid volume contains relatively stable water, the next step can be carried out.
3. The ground identification method for the effect of oil production over water according to claim 1, wherein the method for judging the setting effect of the packer in S4 is to observe the breathing state of the membrane in the identification device for the effect of oil production over water, and judge the setting effect of the packer according to the observation result:
if the film has no obvious periodic breathing phenomenon, the packer has good water-resisting oil extraction setting effect and no leakage condition;
if the film has obvious periodic respiration phenomenon along with the up-down stroke movement process of the pumping unit, the packer separate mining setting is not tight, and leakage exists.
4. The ground identification method for the effects of oil production by water isolation according to claim 3, wherein: the periodic breathing phenomenon refers to the phenomenon that a film swells or sinks along with the motion process of the up-down stroke of the pumping unit.
5. The ground identification method for the oil production isolation effect according to claim 1, wherein the oil production isolation effect identification device comprises:
the pressure plate (1), the axial of the pressure plate (1) is provided with a through hole;
the film (2), the film (2) is detachably connected in the through hole;
the measuring part is detachably connected to the upper surface of the pressure plate (1), and the measuring end of the measuring part is vertical to the center of the upper surface of the film (2);
the sealing part is fixed at the bottom end of the pressure plate (1).
6. The ground identification method for the water-resisting oil extraction effect is characterized in that a circular pressure groove is axially formed in the pressure plate (1), the circular pressure groove is coaxial with the through hole, a pressure ring (3) is arranged in the circular pressure groove, screw holes are equidistantly formed in the pressure ring (3), bolts (4) are arranged in the screw holes, the pressure ring (3) is detachably connected with the pressure plate (1) through the bolts (4), and the thin film (2) is clamped between the pressure ring (3) and the pressure plate (1).
7. The method according to claim 5, wherein the measuring unit includes: distancer (5), support (6), grip ring (7) and set nut (8), one side at pressure disk (1) upper surface is fixed to support (6) one end, the opposite side at support (6) is fixed in grip ring (7), distancer (5) set up in grip ring (7), set nut (8) and grip ring (7) threaded connection, and set nut (8) pass grip ring (7) and act on distancer (5), grip ring (7) are coaxial with the through-hole of pressure disk (1), and grip ring (7) are located pressure disk (1) through-hole directly over.
8. The ground identification method for the effects of water-resisting oil production is characterized in that the sealing part comprises a rubber ring (9), the upper surface of the rubber ring (9) is fixed with the lower surface of the pressure plate (1), and the rubber ring (9) is coaxial with the through hole of the pressure plate (1).
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| US20100212402A1 (en) * | 2009-02-14 | 2010-08-26 | Enerize Corporation | Method and apparatus for precision non-destructive non-contact control of super small differences of pressure |
| CN201637544U (en) * | 2009-11-06 | 2010-11-17 | 艾默生(北京)仪表有限公司 | Detector of remote transmitting diaphragm of pressure gauge |
| CN204439303U (en) * | 2014-12-04 | 2015-07-01 | Tcl通力电子（惠州）有限公司 | Leak test plant |
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| CN107655639A (en) * | 2017-09-01 | 2018-02-02 | 西北工业大学 | Released gas rate detection means |
| CN108225687A (en) * | 2017-12-11 | 2018-06-29 | 中盐金坛盐化有限责任公司 | A kind of detection method of salt hole air reserved storeroom packer setting effect |
| CN210922991U (en) * | 2019-12-03 | 2020-07-03 | 江苏华诺检测技术有限公司 | Novel sealing detection device for automobile |
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| CN112360434B (en) | 2023-10-27 |
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