CN104948134A - Storage-type precise quantitative oil-gas well down-hole work agent injection system and injection method - Google Patents
Storage-type precise quantitative oil-gas well down-hole work agent injection system and injection method Download PDFInfo
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- CN104948134A CN104948134A CN201510370219.5A CN201510370219A CN104948134A CN 104948134 A CN104948134 A CN 104948134A CN 201510370219 A CN201510370219 A CN 201510370219A CN 104948134 A CN104948134 A CN 104948134A
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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
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
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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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing, limiting or eliminating the deposition of paraffins or like substances
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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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/02—Equipment or details not covered by groups E21B15/00 - E21B40/00 in situ inhibition of corrosion in boreholes or wells
Abstract
The invention discloses a storage-type precise quantitative oil-gas well down-hole work agent injection system and injection method. The injection system comprises an injection pipe and a ground pressurization device, the injection pipe is internally provided with one or more injection units, each injection unit comprises a volume-variable work agent storer, pressure is conducted on the volume-variable work agent storers by the ground pressurization device in the injection pipe, and the work agent is squeezed out. The invention discloses an injection method for using the storage-type accurate quantitative oil-gas well down-hole work agent injection system at the same time. The work agent is injected into a down-hole target location in a quantitative mode. According to the injection system, by means of the mode that the work agent can be quantitatively injected into the work agent storers in advance, the work agent can be injected accurately and quantitatively, and the injected volume accuracy of the work agent can be guaranteed. By means of the injection method, the work agent can be injected into the target location accurately and quantitatively, the accuracy of injected volume and the injection location is very good, and the best injection effect is guaranteed.
Description
Technical field
The present invention relates to a kind of memory-type precise quantitative Oil/gas Well underground work agent injected system, and use the method for implanting of this system, belong to oil and natural gas exploitation field.Here Oil/gas Well refers to the Oil/gas Well of broad sense in oil-gas field development, comprise oil well, gas well, the natural gas well, Injection Well, water injection well, heat extraction by steam injection well, steam-stimulated well, steam injection well, deep-well and ultradeep well, horizontal well, high angle hole, directional well, straight well etc.
Background technology
Need in oil-gas field development to inject work agent to down-hole, to improve downhole production situation.The work agent that down-hole is injected comprises following a few class:
(1) plugging agent, comprises glue, cement, falls penetration enhancer;
(2) reservoir sand consolidating agent;
(3) valuable work agent, comprises scale remover, de-plugging agent;
(4) the work agent of limitation is needed, as oxidant;
In Oil/gas Well, inject above-mentioned work agent at present, oil field is all adopt from ground by ground injection device (such as pump truck etc.) direct injection work agent to Oil/gas Well.For down-hole injecting glue, this injection mode have employed ascending pipe and is arranged on packer two parts formation injecting glue tubing string at inlet two ends, top connects working string to ground, in well, colloid is injected by ground installation, colloid is again by the working string of upper km, through the closed annular space that packer and ascending pipe are formed, glue is injected into the target location on the outer annular space of flow string and stratum; Packer adopts inflatable packer, packing inlet two ends.First that amplificate packer is expanded is setting for injection pressure liquid, and wherein use constant pressure valve to control overpressure, what make pressure meet or exceed packer sets pressure; Therefore, liquid injection pipe system in down-hole comprises liquid injection pipe and confinement system.Confinement system comprises packer, and inflatable packer needs to support the use to make the constant pressure valve of the swollen envelope of packer and the bleeder of retraction.
This injecting glue mode " is set up completion structure and the method (application number 201410013598.8) of packing " at Chinese invention patent and has been done more detailed description in the outer packing ring of Oil/gas Well strainer tubing string, this method is exactly the target interval injection choked flow medium to packing ring, forms block ring.This block ring is that fluid is difficult to permeate the packing section even cannot permeated.This patent it is also proposed a kind of method, and the method arranges packer at injection interval two ends exactly, then by ascending pipe string and the inlet be arranged on pipe string, choked flow medium is injected packing ring.
As shown in Figure 1, in Fig. 1: 1-1 is ground injection device; 1-2 is well head; 1-3 is plain filter tubing string; 1-4 is gravel packing zone; 1-5 is actual injection length; 1-6 is design injection length; 1-7 is flow control screen pipe; 1-8 is packing particle; 1-9 is oil-producing formation; 1-10 is block ring; 1-11 is water-yielding stratum; 1-12 is the bore hole borehole wall; 1-13 is working string; 1-14 is agitator tank.Meanwhile, this method for implanting is injected to target interval by whole pipe string, and general pipe string length is at even a few km of upper km, and choked flow medium, by so long pipeline target approach interval, also causes the significant wastage of choked flow medium.In addition, need to set up large-scale Agitation Tank to carry out stirring liquid on ground from the method for well head fluid injection, ample resources should be taken and operate inconvenience again.
Above-mentioned injection mode also Problems existing is as follows:
(1) can not be quantitative, there is excessive injection and owe amount injection; Excessive injection can cause down-hole annular to work the excessive injection of agent, and impact annular space and exploitation aspect, the injection of glue is excessive, can have a strong impact on the manufacturing process of oil recovery gas production, as excessive in colloid injection, glue will enter oil reservoir, and impact oil flows out from stratum, reduces production efficiency; The amount of owing injects the operation object that then can not reach injection;
(2) colloid is along ascending pipe long distance delivery, can be subject to the pollution of impurity in working string, can have a negative impact to colloidality; Affect the task performance of working solution, such as glueability significantly declines, and has a negative impact to the effect of injecting glue operation;
(3) working solution is at carrier pipe long distance delivery, and working solution is contaminated and then pollute stratum and cause subterranean formation production to decline, brings adverse effect to oil recovery and the normal operation of gas production;
(4) glue consumption is large, and gluing equipment volume is joined greatly in ground, and the injected rubber hose which injecting glue must lead to long-distance injects, and causes a large amount of wastes of glue;
(5) which is when multilayer is injected simultaneously, exists again and hierarchical control cannot inject the problem of glue amount.Because different layers, the glue amount difference of needs is very large, in order to reach good effect, generally all adopting layering injecting glue, namely noting one deck, a mobile tubing string, and work operations amount is large, and the efficiency injecting operation is low, can not meet the requirement of high-efficiency homework.
For straight well injecting glue, straight well has five layers, thick 3 meters of oil reservoir, has three interlayers, interlayer be respectively 2 meters thick, well depth is 3000 meters, this well is gravel packed well, if glue ring height is 2 meters, real effective demand is 20L, but adopt the mode of ground injecting glue just to need kilolitre glue, because the glue amount that thousands of mitron wall loses will be considered.And desirably face pumping equipment is by under glue Injection Well for which, and injecting glue accuracy of measurement can not accurately control, and easily pollutes; Pipeline inwall dirt pollutes on the way, and as iron rust etc. can cause stained to glue, chemical agent performance significantly declines; Adopt prepad fluid and after pad slug formula conveying glue, just there will be the problem that prepad fluid and after pad mix mutually respectively at glue.During dragging injecting glue tubing string, one-time positioning precision is low, and error is comparatively large, can not meet the position accuracy demand that operation is injected in down-hole; This operating type is once merely able to glue to be injected into certain one deck, and note one deck needs to drag one deck, and the construction operation time is longer; Ground glue injection equipment volume is large, and the operating process of injecting operation is complicated.
Except injecting glue operation, also have other working solutions to inject, as blockages relieving fluid, cleaning mixture, repair liquid, oxidant etc., such as oxidant, easy blast that carrying amount is large, carrying amount is little, can not deal with problems again.Therefore, note these working solution ground injection methods and there is the problem needing accurately to control injection rate equally.
Therefore, in order to solve the problem, need design one can realize accurate quantification ground injected media and can pinpoint work agent injected system and method for implanting.
Summary of the invention
The technical issues that need to address of the present invention are just the defect overcoming prior art, provide a kind of memory-type precise quantitative Oil/gas Well underground work agent injected system and method for implanting thereof.Memory-type precise quantitative Oil/gas Well underground work agent injected system of the present invention, employing quantitatively can inject the mode of the work agent memory of work agent in advance, can accurate quantification injection work agent, guarantee the accuracy of work agent injection rate, ensure that high efficiency and the accuracy of operation are injected in underground work agent; The waste of work agent can not be caused, avoid tradition and inject the liquid injection pipe of operation and to work a large amount of wastes of agent, improve the utilization rate of work agent, reduce operating cost; After injection operation completes, reuse after can taking out, work agent injected system has the advantages that repeatedly use, and reduces the cost injecting operation, improves operating efficiency;
The present invention utilizes the method for implanting of memory-type precise quantitative Oil/gas Well underground work agent injected system, work agent accurate quantification can be injected target location, have splendid injection accuracy and positional accuracy, ensure that best injection effect; And by packer, by the annular space of work agent packing in target location, can not there is the channelling of work agent, ensure that the normal production operation in down-hole, the layer position beyond target location can not be caused by the impact of work agent.
For solving the problem, the present invention adopts technical scheme to be:
A kind of memory-type precise quantitative Oil/gas Well underground work agent injected system, described injected system comprises ascending pipe and ground compressing device, is provided with one or more groups injection unit in ascending pipe; Often organize the work agent memory that injection unit comprises variable volume, be arranged on the work agent discharging opening with ascending pipe ft connection on ascending pipe, discharging opening is communicated with work agent memory; Ground compressing device produce in ascending pipe act on the work agent memory of variable volume, higher than the pressure of ascending pipe outside, the work agent memory volume of variable volume reduces, work agent flows out to ascending pipe outside through discharging opening.
Carry work agent memory in each injection unit of work agent injected system, carry the work agent quantitatively stored in advance in work agent memory, work agent herein can be liquid and gluey work agent; Ascending pipe is transferred to target location, apply pressure by ground compressing device to work agent memory, make the work agent in work agent memory flow to the target location of ascending pipe outside through discharging opening, the injection operation of agent of finishing the work.
The kind of the work agent adopted in the present invention comprises following several:
(1) choked flow medium: it is characterized in that hypotonic or without oozing, its composition comprise be not limited to following one or more: gel, resin, cement, polymer, penetration enhancer falls;
(2) reservoir sand consolidating agent, scale remover, de-plugging agent, oxidant;
(3) acid solution: its composition comprise be not limited to following one or more: hydrochloric acid, sulfuric acid, hydrogen peroxide.
Work agent is quantitatively stored in work agent memory by technical scheme of the present invention in advance, transferred by ascending pipe and carry out work agent injection operation to target location, can realize injecting the accurate quantification of work agent, the waste of work agent can not be caused, operating type is simply efficient, and operating cost is low.
Preferably, the agent memory that works is bellows memory.This bellows memory can be made by yielding materials such as rubber, plastics, air-locked clothes, after being subject to the pressure of ground compressing device, the volume of bellows memory shrinks and the work agent of its inside is expelled to target location through discharging opening, and operation is injected in agent of finishing the work.
Preferably, bellows memory inside is provided with the catheter with bellows memory outlet, and catheter is provided with multiple delivery hole.Due to the volume of bellows memory be stressed after reduce, the work agent of its inside is easily caused to discharge completely after the sidewall laminating of bellows memory, therefore, design delivery hole, while then can guaranteeing that bellows memory size reduces, the discharge fault of work agent can not be caused, ensure that the passing away of work agent is unobstructed.The work agent that catheter can prevent bellows memory from sealing other positions of outlet obstruction because the part nearer apart from the port of export is first out of shape is extruded.Mozzle can adopt metal tube, also can adopt rubber tube or plastic pipe.
Preferably, the agent memory that works is cylinder sleeve and piston Accumulator.The present invention also can select cylinder sleeve and piston Accumulator to deposit work agent, work agent is quantitatively stored in cylinder sleeve in advance, it is transferred to target location with ascending pipe, by ground compressing device to piston pressurization, piston is moved the work agent in cylinder sleeve is extruded into target location through discharging opening, the injection operation of agent of finishing the work.Cylinder sleeve adopts metal material to make, and piston both can be metal, also can adopt the material such as rubber, plastics.Cylinder sleeve and piston Accumulator all keep sealing state in whole operation process, and work agent is merely able to extrude from discharging opening.
For above-mentioned two class work agent memories, ordinary priority adopts bellows memory.Two kinds of memory contrasts, bellows memory has following advantage:
1. capacity is large, and bellows memory length can accomplish tens meters even tens meters, and cylinder sleeve and piston Accumulator are just difficult to realize this length.
2. volume can adjust flexibly, and bellows memory can connect multistage arbitrarily, and limits by structure, and cylinder sleeve and piston Accumulator are just difficult to realize.
3. cost is low.Bellows memory to be extruded through mould by rubber and is made, and cylinder sleeve and piston Accumulator are made of metal, and need machine.
4. fitting operation is easy.
5. easily safeguard.After bellows memory uses, the rubber bag tank that only need more renew when re-using, cylinder sleeve and piston Accumulator then need to clear up cylinder body, particularly clear up the colloid after solidifying more difficult.
6. can accomplish less outside dimension, be applicable in undersized down-hole string.
Preferably, discharging opening is provided with constant pressure valve.Ground compressing device applies pressure to work agent memory, and when after pressure increase to the operating pressure of constant pressure valve, constant pressure valve is opened, and makes the work agent in work agent memory flow out to target location from discharging opening.The structure of constant pressure valve is set, can guarantees that the work agent in work agent memory is quantitatively effectively preserved, the spilling of work agent can not be caused, guarantee accurate quantification.
Constant pressure valve herein also can select the valve of other modes to replace, as hydraulic open, air pressure open, the valve of pressure burst rupture of membranes chip replaces realizing this function.
Preferably, the agent memory that works is provided with the inlet for injecting work agent in work agent memory.This inlet arranges one way valve, like this to guarantee that the work agent in injection work agent memory can not be flowed out from inlet, guarantees the strict accurate quantification of work agent.
Preferably, positioner can be adopted in technical scheme of the present invention to realize accurate location, and positioner is fixed on instrumentation tubes string, coordinates location, ensure the accuracy of injection phase by the down-hole string entered down.The mode of usual employing is, in well, tubing string arranges shoulder, the conical surface etc., and working string is arranged shoulder or the conical surface of shoulder, conical surface size coupling therewith, locating surface and inlet size design accurately, can ensure accurate location.Also can adopt bottom working string with bottom down-hole string and locate, inlet mates accurately with instrumentation tubes string bottom size and down-hole string distance from bottom size design, also can ensure accurate location.
Preferably, also packer is comprised in technical scheme of the present invention, in the ascending pipe periphery of the upside of the discharging opening of each injection unit and downside, a packer is set, packer is swollen is honored as a queen, the annular space of discharge outlet can be completely cut off, form an enclosure space, make the work agent that is extruded out in work agent memory can only target approach position, the phenomenon of work agent channelling can not be there is, guarantee that the accuracy of operation is injected in work agent, avoid the production operation of work agent channelling to down-hole to bring adverse effect.
The packer adopted in the present invention can by the form such as cup packer or inflatable packer.
Preferably, the afterbody of the agent injected system that works installs a set of bleeder.Bleeder is close in the process of the work of injection agent, after injection operation completes, bleeder can be able to make its mode opened open by pressure or pressure pulse or other, make ascending pipe inside and external communication, external and internal pressure restores balance, packer pressure release is bounced back, and lays down the pressure medium in tubing string, conveniently trip out instrumentation tubes string.
Bleeder can adopt the gate gurgle valve of pin shear-type, and also can adopt the intelligent votage control switch device utilizing pressure pulse to open, wherein votage control switch device can realize repeatedly opening and closing.No matter be single group or the work agent injected system organizing injection unit composition more, only at instrument afterbody, a set of bleeder be installed and can realize this function.
The ground compressing device that technical scheme of the present invention adopts, comprises the high-pressure fluid injection device that the oil fields such as pump truck, fracturing unit truck, cementing truck are conventional;
The present invention discloses a kind of method for implanting using the precise quantitative Oil/gas Well underground work agent injected system of memory-type, this method for implanting is the work agent memory on ground, work agent quantitatively being injected in advance variable volume, ascending pipe is transferred the target location to down-hole; Ground compressing device produce in ascending pipe act on the work agent memory of variable volume, higher than the pressure of ascending pipe outside, the work agent memory volume of variable volume reduces, work agent flows out to ascending pipe outside through discharging opening.
The concrete steps of this method for implanting are:
(1) on ground, work agent is quantitatively injected in advance the work agent memory of the variable volume in ascending pipe; The amount of the work agent needed for assigned target position, injects work agent in work agent memory;
(2) packer is connected in series respectively at the upper and lower of the discharging opening of ascending pipe; Packer is used for the annular space packing in target location, down-hole, and channelling appears in the work agent of avoiding, and guarantees the accuracy that work agent is injected;
(3) ascending pipe and feeding pipe are connected to form instrumentation tubes string; According to the degree of depth of target location, ascending pipe being connected in series as instrumentation tubes string with feeding pipe, by sending into pipe, ascending pipe being transferred to target location;
(4) ascending pipe is transferred to down-hole, discharging opening is aimed at the mark position, reaches accurate location;
(5) by ground compressing device, in ascending pipe, apply pressure, continuous supercharging, make the pressure of ascending pipe inside higher than the pressure of ascending pipe outside; Now packer swollen envelope under the effect of the pressure, by the annular space packing of target location upper and lower;
(6) when the pressure in ascending pipe reaches the operating pressure of discharging opening constant pressure valve, constant pressure valve is opened, and the work agent in work agent memory is flowed out from discharging opening, by the annular space between packer, is injected into target location; The swollen seal pressure of packer is less than the operating pressure of constant pressure valve, i.e. packer first swollen envelope, and after pressure continues to increase afterwards, constant pressure valve is opened, and operation is injected in agent of starting working;
(7) the pressure extrusion work agent memory in ascending pipe, makes work agent extrude until the volume of the agent memory that works no longer reduces through discharging opening, injects operation and completes.Under the effect of packer, work agent is accurately injected in target location, and channelling phenomenon can not occur in work agent, guarantees the accuracy of the accuracy that work agent is injected and injection rate.
Advantage of the present invention and beneficial effect are:
Memory-type precise quantitative Oil/gas Well underground work agent injected system of the present invention, employing quantitatively can inject the mode of the work agent memory of work agent in advance, can accurate quantification injection work agent, guarantee the accuracy that work agent is injected, ensure that high efficiency and the accuracy of operation are injected in underground work agent;
Memory-type precise quantitative Oil/gas Well underground work agent injected system of the present invention, quantitatively work agent is stored in advance in work agent memory, transfer and carry out injection operation to target location, the waste of work agent can not be caused, avoid tradition to inject the liquid injection pipe of operation and to work a large amount of wastes of agent, improve the utilization rate of work agent, reduce operating cost;
Memory-type precise quantitative Oil/gas Well underground work agent injected system of the present invention, after injection operation completes, reuses after can taking out, and work agent injected system has the advantages that repeatedly use, and reduces the cost injecting operation, improves operating efficiency;
The present invention utilizes the method for implanting of memory-type precise quantitative Oil/gas Well underground work agent injected system, work agent accurate quantification can be injected target location, have splendid injection accuracy and positional accuracy, ensure that best injection effect; And by packer, by the annular space of work agent packing in target location, can not there is the channelling of work agent, ensure that the normal production operation in down-hole, the layer position beyond target location can not be caused by the impact of work agent.
In addition, form coagulable glue for a kind of by after glue main body and the mixing of one or more cross-linked evocating agent, have and can solidify gradually within a certain period of time.If this glue is after ground is pre-mixed, then G.I.H, glue will be caused to solidify before operation is injected in enforcement, just cannot extrude from work agent memory, cause operation failure.In order to address this problem, the present invention discloses a kind of method for implanting using the precise quantitative Oil/gas Well underground work agent injected system of memory-type, this method for implanting is for buried target position injecting glue, for convenience of description, below describe that glue main body and a kind of cross-linked evocating agent be mixed into, glue main body is referred to as A agent, and cross-linked evocating agent is referred to as B agent, and described glue is mixed in proportion by A agent and B agent.On ground, A agent and B agent are distinguished in advance the work agent memory of the quantitatively variable volume that injection two is different according to predetermined ratio, the outlet of A agent memory and the outlet of B agent memory arrange the flow regulator of one way valve and corresponding proportion respectively, and the outlet of A agent memory and B agent memory export and interconnect between discharging opening.In addition, partition liquid can be filled in advance in the outlet of A agent memory and the cavity between the outlet of B agent memory and discharging opening, be combined with one way valve, for separating A agent and B agent, preventing A agent and B agent before injecting glue operation from mixing in advance; Also can not note, only utilize one way valve to separate A agent and B agent.Then, ascending pipe is transferred the target location to down-hole; Ground compressing device produce in ascending pipe act on the work agent memory of variable volume, higher than the pressure of ascending pipe outside, the work agent memory volume of variable volume reduces, first partition liquid is extruded, A agent and B agent are again respectively through respective flow regulator, enter runner mixing by the flow of predetermined ratio, then mixed work agent flows out to ascending pipe outside through discharging opening.Supplementary notes, if pectin is mixed by glue main body and more than one cross-linked evocating agent, so just need glue main body and each cross-linked evocating agent respectively by the plural work agent memory of injection.
Accompanying drawing explanation
Fig. 1 is the structural representation in background technology.
Fig. 2 is the structural representation of single group injection unit in the embodiment of the present invention 1.
Fig. 3 is the injected system structural representation of three groups of injection units that the embodiment of the present invention 1 adopts.
Fig. 4 is the structural representation of single group injection unit in the embodiment of the present invention 2.
Fig. 5 is the structural representation of the injected system of single group injection unit in the embodiment of the present invention 2.
Fig. 6, after ascending pipe is transferred and put in place in the embodiment of the present invention 3, extrudes the down-hole view before work agent.
Fig. 7, after ascending pipe is transferred and put in place in the embodiment of the present invention 3, extrudes the down-hole view after work agent.
Fig. 8, after ascending pipe is transferred and put in place in the embodiment of the present invention 4, extrudes the down-hole view before work agent.
Fig. 9, after ascending pipe is transferred and put in place in the embodiment of the present invention 4, extrudes the down-hole view after work agent.
Figure 10 is the injected system structural representation of three groups of injection units that the embodiment of the present invention 7 adopts.
Figure 11 is the structural representation of the list group injection unit in the embodiment of the present invention 7.
Figure 12 be inject operation in the embodiment of the present invention 8 before down-hole view.
Figure 13 be inject operation in the embodiment of the present invention 8 after down-hole view.
Specific embodiments
The following example will further illustrate the present invention.
embodiment 1
The present embodiment is a kind of memory-type precise quantitative Oil/gas Well underground work agent injected system, is illustrated in figure 3 the work agent injected system of the bellows memory of three groups of injection units, and 3-1 is for sending into pipe; 3-2 is ascending pipe; 3-3 is packer; 3-4 is discharging opening; 3-5 is constant pressure valve; 3-6 is catheter; 3-7 is work agent memory; 3-8 is work agent; 3-9 is inlet; 3-10 is bleeder; 3-11 pressure transmission hole; 3-12 protective sleeve.Described injected system comprises ascending pipe and ground compressing device, is provided with 3 groups of injection units in ascending pipe; Often organize the work agent memory that injection unit comprises variable volume, be arranged on the work agent discharging opening with ascending pipe ft connection on ascending pipe, discharging opening is communicated with work agent memory; Ground compressing device produce in ascending pipe act on the work agent memory of variable volume, higher than the pressure of ascending pipe outside, the work agent memory volume of variable volume reduces, work agent flows out to ascending pipe outside through discharging opening, the ground compressing device that the present embodiment adopts is pump truck, applies pressure by injecting water in ascending pipe.
Work agent memory is bellows memory.Bellows memory inside is provided with the catheter with bellows memory outlet, and catheter is provided with multiple delivery hole.Discharging opening is provided with constant pressure valve.Work agent memory is provided with the inlet for injecting work agent in work agent memory.There is protective sleeve bellows memory outside, and the general metal foil orifice plate that adopts is made.Often organize injection unit and be all provided with pressure transmission hole, the fluid pressure injected in tubing string for ground pressure device can be delivered to tubing string bottommost smoothly.
Fig. 2 is the structural representation of the single injection unit of the present embodiment, in Fig. 7: 2-1 is packer; 2-2 is catheter; 2-3 is work agent; 2-4 is one way valve; 2-5 is bleeder; 2-6 is work agent memory; 2-7 is constant pressure valve; 2-8 is discharging opening; 2-9 is ascending pipe; 2-10 is protective sleeve; 2-11 is pressure transmission hole.
embodiment 2
The present embodiment is a kind of memory-type precise quantitative Oil/gas Well underground work agent injected system, and be illustrated in figure 5 the cylinder sleeve of one group of injection unit and the work agent injected system of piston Accumulator, 5-1 is bleeder; 5-2 is positioner; 5-3 is for sending into pipe; 5-4 is packer; 5-5 is discharging opening; 5-6 is constant pressure valve; 5-7 is cylinder sleeve; 5-8 is work agent; 5-9 is piston; 5-10 is one way valve; 5-11 is sealing screw; 5-12 is ascending pipe; 5-13 is pressure transmission hole.Described injected system comprises ascending pipe and ground compressing device, is provided with 1 group of injection unit in ascending pipe; Often organize the work agent memory that injection unit comprises variable volume, be arranged on the work agent discharging opening with ascending pipe ft connection on ascending pipe, discharging opening is communicated with work agent memory; Ground compressing device produce in ascending pipe act on the work agent memory of variable volume, higher than the pressure of ascending pipe outside, the work agent memory volume of variable volume reduces, work agent flows out to ascending pipe outside through discharging opening, the ground compressing device that the present embodiment adopts is pump truck, applies pressure by injecting water in ascending pipe.After injection operation completes, open the water sent in pipe by bleeder and send into pipe ft connection, shedding the pressure sent in pipe, make removing seal for packer, being convenient to send into pipe and taking out down-hole.Work agent memory is cylinder sleeve and piston type.Discharging opening is provided with constant pressure valve.Work agent memory is provided with the inlet for injecting work agent in work agent memory.Often organize injection unit and be all provided with pressure transmission hole, the fluid pressure injected in tubing string for ground pressure device can be delivered to tubing string bottommost smoothly.
Fig. 4 is the structural representation of the single injection unit adopted in the present embodiment, in Fig. 4: 4-1 is ascending pipe; 4-2 is packer; 4-3 is discharging opening; 4-4 is constant pressure valve; 4-5 is cylinder sleeve; 4-6 is work agent; 4-7 is one way valve; 4-8 is piston; 4-10 is pressure transmission hole.
embodiment 3
Use a method for implanting for the precise quantitative Oil/gas Well underground work agent injected system of memory-type, this method for implanting is the work agent memory on ground, work agent quantitatively being injected in advance variable volume, ascending pipe is transferred the target location to down-hole; Ground compressing device produce in ascending pipe act on the work agent memory of variable volume, higher than the pressure of ascending pipe outside, the work agent memory volume of variable volume reduces, work agent flows out to the annular space of ascending pipe outside through discharging opening.
The present embodiment 3 adopts the work agent injected system of the bellows memory of three groups of injection units described in embodiment 1 to carry out injection operation, the present embodiment carries out in the oil recovery horizontal well of bottom water reservoir, enter to prevent the cone of end water, in composite screen pipe completion and the outer annular space of screen casing is filled with gravel, carry gel with underground quantity note work agent instrument.Form packing in three target locations, place, prevent the axial channelling of formation fluid in pit shaft.
As shown in Figure 6, the down-hole view before operation is being injected, in Fig. 6: 6-1 is top packer; 6-2 is gravel packing zone; 6-3 is discharging opening; 6-4 is ascending pipe; 6-5 is target location; 6-6 is bellows memory; 6-7 is bleeder; 6-8 is the bore hole borehole wall; 6-9 is work agent; 6-10 is catheter; 6-11 is packer; 6-12 is positioner; 6-13 is for sending into pipe.
The concrete steps of this method for implanting are:
(1) on ground, work agent is quantitatively injected in advance the work agent memory of the variable volume in ascending pipe; The work agent of injecting in each work agent memory is 22.5L;
(2) packer is connected in series respectively at the upper and lower of the discharging opening of ascending pipe;
(3) ascending pipe and feeding pipe are connected to form instrumentation tubes string;
(4) ascending pipe is transferred to down-hole, discharging opening is aimed at the mark position; Determine target location by the positioner on instrumentation tubes string, make discharging opening corresponding thereto;
(5) by ground compressing device, in ascending pipe, apply pressure, continuous supercharging, make the pressure of ascending pipe inside higher than the pressure of ascending pipe outside; The present embodiment adopt pump truck add water in ascending pipe pressurization mode carry out;
(6) when the pressure in ascending pipe reaches the operating pressure of discharging opening constant pressure valve, constant pressure valve is opened, and the work agent in work agent memory is flowed out from discharging opening, by the annular space between packer, is injected into target location; The operating pressure of packer is less than the operating pressure of constant pressure valve, namely when ground compressing device constantly pressurizes, boost to 2MPa, inflatable packer sets, pressure reaches the operating pressure 2.5MPa of constant pressure valve after constantly increasing afterwards, and constant pressure valve is opened and carried out work agent injection operation then;
(7) the pressure extrusion work agent memory in ascending pipe, the work agent of making is extruded until the volume of the agent memory that works no longer reduces, and injects operation and completes.When injecting work agent in advance in work agent memory, calculating the residual quantity finally can not extruded in work agent memory and discharging opening, guaranteeing that the accurate quantitative analysis of the work agent of injecting injects.
After injection operation completes, reduced pressure by bleeder, make packer pressure release, be convenient to ascending pipe and send into pipe take out from down-hole.
As shown in Figure 7, down-hole view after injection operation completes, in Fig. 7: 7-1 is top packer; 7-2 is gravel packing zone; 7-3 is discharging opening; 7-4 is by the bellows memory compressed; 7-5 is target location; 7-6 is packer; 7-7 is bleeder; 7-8 is the bore hole borehole wall; 7-9 is positioner; 7-10 is for sending into pipe.In 3 target location accurate quantification injection work agent of down-hole.
embodiment 4
Use a method for implanting for the precise quantitative Oil/gas Well underground work agent injected system of memory-type, this method for implanting is the work agent memory on ground, work agent quantitatively being injected in advance variable volume, ascending pipe is transferred the target location to down-hole; Ground compressing device produce in ascending pipe act on the work agent memory of variable volume, higher than the pressure of ascending pipe outside, the work agent memory volume of variable volume reduces, work agent flows out to the annular space of ascending pipe outside through discharging opening.
The present embodiment 4 adopts the work agent injected system of the bellows memory of three groups of injection units described in embodiment 1 to carry out injection operation, the present embodiment carries out in viscous crude well-case perforating straight well, in order to control water outlet and sand control, do not affect oil production simultaneously, in composite screen pipe completion and the outer annular space of screen casing is filled with packing particle, coagulable polymer is carried with underground quantity note work agent instrument, in packing particle, described polymer is injected in the target location of 3 different depths, after it solidifies, set up block ring simultaneously.
As shown in Figure 8, the down-hole view before operation is being injected, in Fig. 8: 8-1 is the pipe box borehole wall; 8-2 is for sending into pipe; 8-3 is positioner; 8-4 is top packer; 8-5 is gravel packing zone; 8-6 is discharging opening; 8-7 is bellows memory; 8-8 is target location; 8-9 is packer; 8-10 is perforation tunnel; 8-11 is work agent; 8-12 is bleeder; 8-13 is catheter; 8-14 is sand control screen pipe string.
The concrete steps of this method for implanting are:
(1) on ground, work agent is quantitatively injected in advance the work agent memory of the variable volume in ascending pipe; The work agent of injecting in each work agent memory is 20L polymer; The length of required block ring is 2m, and the polymer volume that each target location needs is 15L.
(2) packer is connected in series respectively at the upper and lower of the discharging opening of ascending pipe; This packer is inflatable packer.
(3) ascending pipe and feeding pipe are connected to form instrumentation tubes string;
(4) ascending pipe is transferred to down-hole, discharging opening is aimed at the mark position; Determine target location by the positioner on instrumentation tubes string, make discharging opening corresponding thereto;
(5) by ground compressing device, in ascending pipe, apply pressure, continuous supercharging, make the pressure of ascending pipe inside higher than the pressure of ascending pipe outside; The present embodiment adopt pump truck add water in ascending pipe pressurization mode carry out;
(6) when the pressure in ascending pipe reaches the operating pressure of discharging opening constant pressure valve, constant pressure valve is opened, and the work agent in work agent memory is flowed out from discharging opening, by the annular space between packer, is injected into target location; The operating pressure of packer is less than the operating pressure of constant pressure valve, namely when ground compressing device constantly pressurizes, boost to 2MPa, inflatable packer sets, pressure reaches the operating pressure 2.5MPa of constant pressure valve after constantly increasing afterwards, and constant pressure valve is opened and carried out work agent injection operation then;
(7) the pressure extrusion work agent memory in ascending pipe, the work agent of making is extruded until the volume of the agent memory that works no longer reduces, and injects operation and completes.When injecting work agent in advance in work agent memory, calculating the residual quantity finally can not extruded in work agent memory and discharging opening, guaranteeing that the accurate quantitative analysis of the work agent of injecting injects.In the present embodiment, each target location needs 15L polymer, in each work agent memory, inject 20L polymer in advance.
After injection operation completes, reduced pressure by bleeder, make packer pressure release, be convenient to ascending pipe and send into pipe take out from down-hole.Closing well is after about 24 hours, and the polymer injecting packing particle will be frozen into solid automatically, forms stable block ring.
As shown in Figure 9, down-hole view after injection operation completes, in Fig. 9: 9-1 is the pipe box borehole wall; 9-2 is for sending into pipe; 9-3 is positioner; 9-4 is top packer; 9-5 is gravel packing zone; 9-6 is discharging opening; 9-7 is bellows memory; 9-8 is target location; 9-9 is packer; 9-10 is perforation tunnel; 9-11 is bleeder; 9-12 is catheter; 9-14 is sand control screen pipe string.Inject coagulable polymer at 3 target location accurate quantifications of down-hole, form 3 block rings.
embodiment 5
On the basis of embodiment 3, another embodiment of the present invention is a kind of method for implanting using the precise quantitative Oil/gas Well underground work agent injected system of memory-type; Work agent in 3 bellows memories of the method is respectively reservoir sand consolidating agent, cement and hydrogen peroxide; Once transfer ascending pipe and can realize 3 stratum, inject the operation of 3 kinds of different operating agent simultaneously respectively, greatly improve operating efficiency, reduce operating cost;
Ground compressing device is pump truck, pressurizes work agent to extrude in bellows memory in ascending pipe;
Packer adopts cup packer;
Other parts are identical with embodiment 3.
embodiment 6
On the basis of embodiment 4, another embodiment of the present invention is a kind of method for implanting using the precise quantitative Oil/gas Well underground work agent injected system of memory-type; The work agent memory that the method adopts is cylinder sleeve and piston Accumulator, and the work agent in 3 cylinder sleeves and piston Accumulator is respectively scale remover, gel and resin; Once transfer send into pipe and ascending pipe can realize on 3 stratum, simultaneously respectively injection 3 kinds of different operating agent injection operation, greatly improve operating efficiency, reduce operating cost;
Ground compressing device is the fracturing unit truck on ground, and fracturing unit truck pressurizes in ascending pipe, and work agent is extruded in cylinder sleeve and piston Accumulator;
Packer adopts inflatable packer;
Other parts are identical with embodiment 4.
embodiment 7
The present embodiment is a kind of memory-type precise quantitative Oil/gas Well underground work agent injected system, is the work agent injected system of the bellows memory of three groups of injection units as shown in Figure 10, and 10-1 is for sending into pipe; 10-2 is ascending pipe; 10-3 is packer; 10-4 is discharging opening; 10-5 is constant pressure valve; 10-6 is catheter; 10-7 is A work agent memory; 10-8 is A work agent; 10-9 is inlet; 10-10 is bleeder; 10-11 is B work agent memory; 10-12 is B work agent; 10-13 is flow regulator A; 10-14 is flow regulator B.Described injected system comprises ascending pipe and ground compressing device, is provided with 3 groups of injection units in ascending pipe; Often organize work agent memory and B of A that injection unit comprises variable volume to work agent memory, be arranged on the work agent discharging opening with ascending pipe ft connection on ascending pipe, discharging opening and A, B agent memory that works interconnects; Ground compressing device produce in ascending pipe act on the work agent memory of variable volume, higher than the pressure of ascending pipe outside, the work agent memory volume of variable volume reduces, work agent flows out to ascending pipe outside through discharging opening, the ground compressing device that the present embodiment adopts is pump truck, applies pressure by injecting water in ascending pipe.
A, B work agent memory is bellows memory.Bellows memory inside is provided with the catheter with bellows memory outlet, and catheter is provided with multiple delivery hole.A, B work agent memory is all provided with constant pressure valve.A, B work agent memory is all provided with the inlet for injecting work agent in work agent memory.
Figure 11 is the structural representation of the single injection unit of the present embodiment, and Tu11Zhong: 11-1 is packer; 11-2 is catheter; 11-3 is A work agent; 11-4 is one way valve; 11-5 is bleeder; 11-6 is A work agent memory; 11-7 is constant pressure valve; 11-8 is discharging opening; 11-9 is ascending pipe; 11-10 is A work agent memory; 11-11 is A work agent; 11-12 is flow regulator A; 11-13 is flow regulator B.
embodiment 8
Use a method for implanting for the precise quantitative Oil/gas Well underground work agent injected system of memory-type, this method for implanting is for oilbearing stratum injecting glue, and described glue is mixed in proportion by A agent and B agent.This method for implanting is the work agent memory on ground, A agent and B agent quantitatively being injected respectively variable volume according to predetermined ratio 1:50, the outlet of A agent memory and the outlet of B agent memory arrange the flow regulator of one way valve and corresponding proportion respectively, the outlet of A agent memory and B agent memory export and interconnect between discharging opening, but partition liquid to be filled in advance in the outlet of A agent memory and the cavity between the outlet of B agent memory and discharging opening, for separating A agent and B agent, prevent before injecting glue operation, A agent and B agent mix in advance, cause colloid solidification, blocking discharging opening, colloid is made to inject annular space.Then, ascending pipe is transferred the target location to down-hole; Ground compressing device produce in ascending pipe act on the work agent memory of variable volume, higher than the pressure of ascending pipe outside, the work agent memory volume of variable volume reduces, first partition liquid is extruded, A agent and B agent are again respectively through respective flow regulator, enter runner mixing by the flow of predetermined ratio, then mixed work agent flows out to ascending pipe outside through discharging opening.This A agent and B agent mix the benefit brought in underground: could form coagulable glue within a certain period of time after 1. A agent and B agent only have mixing; If 2. A agent and B agent mix on ground, because the Hou Ning time mixing rear glue is short, enter under it in process and just solidified in advance, cause operation failure.And allow A agent and B agent mix plastic again in the target location being lowered into the present embodiment, be directly just injected into target location, avoid the problem that glue solidifies in advance.
The present embodiment 8 adopts the work agent injected system of the bellows memory of three groups of injection units described in embodiment 7 to carry out injection operation, the present embodiment carries out in well-case perforating straight well, in order to control water outlet and sand control, do not affect oil production simultaneously, in composite screen pipe completion and the outer annular space of screen casing is filled with packing particle, A agent and B agent is carried with underground quantity fluid injection instrument, after A agent and B agent mix in proportion, form coagulable glue, in packing particle, 3 different depths set up block ring simultaneously.
As shown in figure 12, injecting the down-hole view before operation, Tu12Zhong: 12-1 is Wall of Cased Hole; 12-2 is for sending into pipe; 12-3 is positioner; 12-4 is top packer; 12-5 is gravel packing zone; 12-6 is discharging opening; 12-7 is bellows memory A; 12-8 is target location; 12-9 is packer; 12-10 is perforation tunnel; 12-11 is A work agent; 12-12 is bleeder; 12-13 is catheter; 12-14 is bellows memory B; 12-15 is B work agent; 12-16 is flow regulator A; 12-17 is flow regulator B.
The concrete steps of this method for implanting are:
(1) on ground, A agent and B agent are quantitatively injected respectively the work agent memory of variable volume according to predetermined ratio 1:50, the outlet of A agent memory and the outlet of B agent memory arrange the flow regulator of one way valve and corresponding proportion respectively, the outlet of A agent memory and B agent memory export and interconnect between discharging opening, but will fill partition liquid in advance in the outlet of A agent memory and the cavity between the outlet of B agent memory with discharging opening;
(2) packer is connected in series respectively at the upper and lower of the discharging opening of ascending pipe; This packer is inflatable packer.
(3) ascending pipe and feeding pipe are connected to form instrumentation tubes string;
(4) ascending pipe is transferred to down-hole, discharging opening is aimed at the mark position; Determine target location by the positioner on instrumentation tubes string, make discharging opening corresponding thereto;
(5) by ground compressing device, in ascending pipe, apply pressure, continuous supercharging, make the pressure of ascending pipe inside higher than the pressure of ascending pipe outside; The present embodiment adopt fracturing unit truck add water in ascending pipe pressurization mode carry out;
(6) when the pressure in ascending pipe reaches the operating pressure of discharging opening constant pressure valve, each constant pressure valve is opened simultaneously, A agent and B agent are from respective work agent memory, flow out through flow regulator, coagulable glue is mixed in runner, then glue flows out from discharging opening, by the annular space between packer, is injected into target location; The operating pressure of packer is less than the operating pressure of constant pressure valve, namely when ground compressing device constantly pressurizes, boost to 2MPa, inflatable packer sets, pressure reaches the operating pressure 2.5MPa of constant pressure valve after constantly increasing afterwards, and constant pressure valve is opened and carried out work agent injection operation then;
(7) the pressure extrusion work agent memory in ascending pipe, the work agent of making is extruded until the volume of the agent memory that works no longer reduces, and injects operation and completes.When injecting work agent in advance in work agent memory, calculating the residual quantity finally can not extruded in work agent memory and discharging opening, guaranteeing that the accurate quantitative analysis of the work agent of injecting injects.In the present embodiment, each target location needs 25L glue, adds that loss needs to carry glue 30L, calculates, need in different operating agent memory, inject 0.6L A agent and 29.4L B agent in advance according to 1:50 ratio.
After injection operation completes, reduced pressure by bleeder, make packer pressure release, take out ascending pipe from down-hole and send into pipe.Closing well is after about 24 hours, and the polymer injecting packing particle will be frozen into solid automatically, forms stable block ring.
As shown in figure 13, down-hole view after injection operation completes, Tu13Zhong: 13-1 is the pipe box borehole wall; 13-2 is for sending into pipe; 13-3 is positioner; 13-4 is top packer; 13-5 is gravel packing zone; 13-6 is discharging opening; 13-7 is bellows memory A; 13-8 is target location; 13-9 is packer; 13-10 is perforation tunnel; 13-11 is A work agent; 13-12 is bleeder; 13-13 is catheter; 13-14 is bellows memory B; 13-15 is B work agent; 13-16 is flow regulator A; 13-17 is flow regulator B.At 3 target location accurate quantification injection of polymer of down-hole, form 3 block rings.
Last it is noted that obviously, above-described embodiment is only for example of the present invention is clearly described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of amplifying out or variation be still among protection scope of the present invention.
Claims (9)
1. a memory-type precise quantitative Oil/gas Well underground work agent injected system, described injected system comprises ascending pipe and ground compressing device, it is characterized in that, is provided with one or more groups injection unit in ascending pipe; Often organize the work agent memory that injection unit comprises variable volume, be arranged on the work agent discharging opening with ascending pipe ft connection on ascending pipe, discharging opening is communicated with work agent memory; Ground compressing device produce in ascending pipe act on the work agent memory of variable volume, higher than the pressure of ascending pipe outside, the work agent memory volume of variable volume reduces, work agent flows out to ascending pipe outside through discharging opening.
2. memory-type precise quantitative Oil/gas Well underground work agent injected system as claimed in claim 1, is characterized in that, work agent memory is bellows memory.
3. memory-type precise quantitative Oil/gas Well underground work agent injected system as claimed in claim 2, it is characterized in that, bellows memory inside is provided with the catheter with bellows memory outlet, and catheter is provided with multiple delivery hole.
4. memory-type precise quantitative Oil/gas Well underground work agent injected system as claimed in claim 1, is characterized in that, work agent memory is cylinder sleeve and piston Accumulator.
5. the memory-type precise quantitative Oil/gas Well underground work agent injected system as described in as arbitrary in claim 1-5, it is characterized in that, discharging opening is provided with constant pressure valve.
6. the memory-type precise quantitative Oil/gas Well underground work agent injected system as described in as arbitrary in claim 1-5, is characterized in that, work agent memory is provided with the inlet for injecting work agent in work agent memory.
7. the memory-type precise quantitative Oil/gas Well underground work agent injected system as described in as arbitrary in claim 1-6, it is characterized in that, two or more work agent memories are provided with in ascending pipe, carry different work agent respectively, two memory outlets interconnect with discharging opening, and work agent memory is all provided with flow regulator, different work agent through flow regulator out after, first be mixed to form mixed liquor in proportion, and then flow to ascending pipe outside.
8. one kind uses the method for implanting of the precise quantitative Oil/gas Well underground work agent injected system of memory-type, it is characterized in that, described method for implanting is the work agent memory on ground, work agent quantitatively being injected in advance variable volume, ascending pipe is transferred the target location to down-hole; Ground compressing device produce in ascending pipe act on the work agent memory of variable volume, higher than the pressure of ascending pipe outside, the work agent memory volume of variable volume reduces, work agent flows out to ascending pipe outside through discharging opening.
9. the precise quantitative Oil/gas Well underground work agent injected system method for implanting using memory-type as claimed in claim 8, it is characterized in that, the step of described method for implanting is:
(1) on ground, work agent is quantitatively injected in advance the work agent memory of the variable volume in ascending pipe;
(2) packer is connected in series respectively at the upper and lower of the discharging opening of ascending pipe;
(3) ascending pipe and feeding pipe are connected to form instrumentation tubes string;
(4) ascending pipe is transferred to down-hole, discharging opening is aimed at the mark position;
(5) by ground compressing device, in ascending pipe, apply pressure, continuous supercharging, make the pressure of ascending pipe inside higher than the pressure of ascending pipe outside;
(6) when the pressure in ascending pipe reaches the operating pressure of discharging opening constant pressure valve, constant pressure valve is opened, and the work agent in work agent memory is flowed out from discharging opening, by the annular space between packer, is injected into target location;
(7) the pressure extrusion work agent memory in ascending pipe, the work agent of making is extruded until the volume of the agent memory that works no longer reduces, and injects operation and completes.
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| CN201510370219.5A CN104948134B (en) | 2015-06-30 | 2015-06-30 | Memory-type precise quantitative Oil/gas Well underground work agent injected system and method for implanting |
| PCT/CN2016/078947 WO2017000622A1 (en) | 2015-06-30 | 2016-04-11 | Storage-type precise quantitative injection system for injection of underground oil or gas well operating agent and injection method thereof |
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| CN112523737B (en) * | 2020-10-23 | 2022-09-20 | 西安石油大油气科技有限公司 | Oil well acidification process and device for improving oil and gas well yield |
| CN112392439A (en) * | 2020-12-04 | 2021-02-23 | 中国石油天然气股份有限公司 | Underground medicament controlled release device and control method for oil-water well |
| CN112392439B (en) * | 2020-12-04 | 2022-12-02 | 中国石油天然气股份有限公司 | Underground medicament controlled release device and control method for oil-water well |
Also Published As
| Publication number | Publication date |
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| CN104948134B (en) | 2018-04-06 |
| WO2017000622A1 (en) | 2017-01-05 |
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