CN108266168B - Device for detecting polymer matching and gathering conditions on site - Google Patents
Device for detecting polymer matching and gathering conditions on site Download PDFInfo
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- CN108266168B CN108266168B CN201611254543.1A CN201611254543A CN108266168B CN 108266168 B CN108266168 B CN 108266168B CN 201611254543 A CN201611254543 A CN 201611254543A CN 108266168 B CN108266168 B CN 108266168B
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- 229920000642 polymer Polymers 0.000 title claims abstract description 111
- 239000007788 liquid Substances 0.000 claims abstract description 64
- 238000002347 injection Methods 0.000 claims abstract description 38
- 239000007924 injection Substances 0.000 claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 claims abstract description 26
- 241000191291 Abies alba Species 0.000 claims abstract description 11
- 238000005070 sampling Methods 0.000 claims description 16
- 238000003825 pressing Methods 0.000 claims description 13
- 230000001105 regulatory effect Effects 0.000 claims description 13
- 238000012360 testing method Methods 0.000 claims description 10
- 238000011065 in-situ storage Methods 0.000 claims description 7
- 238000010668 complexation reaction Methods 0.000 claims description 6
- 210000004907 gland Anatomy 0.000 claims description 2
- 210000002445 nipple Anatomy 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 27
- 238000002360 preparation method Methods 0.000 abstract description 10
- 238000006116 polymerization reaction Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 19
- 230000008569 process Effects 0.000 description 16
- 239000000243 solution Substances 0.000 description 8
- 239000002699 waste material Substances 0.000 description 7
- 239000003921 oil Substances 0.000 description 4
- 238000010008 shearing Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000013178 mathematical model Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a device for detecting polymer matching and polymerization conditions on site. The device includes: a christmas tree for a polymer injection well having a first production gate and a casing gate; a flow distributor connected to the christmas tree; the liquid inlet hole is connected with the first production gate, and the liquid outlet hole is connected with the sleeve gate; the polymer preparation device comprises: a shell and an adjustable flow core; the housing includes: a middle sleeve; the first shell is connected with the first end of the middle sleeve and is provided with a liquid inlet hole and a first pressure measuring port for mounting a first pressure gauge; the second shell is connected with the second end of the middle sleeve and is provided with a liquid outlet hole and a second pressure measuring port for mounting a second pressure gauge; the adjustable flow core includes: a core rod which passes through the first shell and can rotate relative to the first shell; a guide bar fixed to the second housing and having a guide rail along an axial direction thereof; the throttling core rod is sleeved on the core rod, is positioned in the middle sleeve and can move to the second shell along the guide rail. The device has the advantages of real and reliable detection result and high accuracy.
Description
Technical Field
The invention relates to the technical field of polymer flooding, in particular to a device for detecting polymer matching and polymerization conditions on site.
Background
Polymer flooding is an important technical means for improving the recovery ratio of crude oil in the middle and later periods of oilfield flooding development. In order to maximize the efficiency of the crude oil production in tertiary oil recovery development, a downhole multistage stratified polymer injection process is generally adopted.
The multi-stage layered polymer injection process is mainly realized by adjusting the layered polymer injection amount by throwing, dragging and replacing throttling cores with different specifications in the polymer preparation device. The throttling core used in the process has to meet the key technical indexes of viscosity retention rate of the polymer, throttling pressure difference, polymer discharge capacity and the like required by tertiary oil recovery so as to reduce the mechanical shearing action of the throttling core on the polymer.
At present, the detection means of three technical indexes, namely viscosity retention rate, throttling pressure difference and polymer discharge capacity, of the polymer in China mainly comprise a numerical simulation method and an indoor experiment. The numerical simulation method calculates the throttling pressure difference of the polymer generated by different throttling cores by establishing a mathematical model. However, the polymer solution belongs to power law fluid, the difficulty in establishing a mathematical model is high, the viscosity loss rate is difficult to accurately calculate, and the calculation result needs further field verification. The detection conditions and polymer performance of the indoor test are greatly different from those of the actual polymer injection well on site, the polymer solution of the indoor test needs to be prepared independently, the test cost is high, the detection period is long, and a large amount of polymer waste liquid generated after the test is difficult to treat.
Disclosure of Invention
In order to solve the technical problem, the invention provides a device for detecting the polymer matching and polymerization conditions on site. The technical scheme is as follows:
the invention provides a device for detecting polymer matching and polymerization conditions on site, which comprises:
a christmas tree for a polymer injection well having a first production gate and a casing gate;
a flow distributor connected to the christmas tree; and
the liquid inlet hole is connected with the first production gate, and the liquid outlet hole is connected with the sleeve gate;
the matching and gathering device comprises: a shell and an adjustable flow core;
the housing includes: a middle sleeve; the first shell is connected with the first end of the middle sleeve and is provided with a liquid inlet hole and a first pressure measuring port for mounting a first pressure gauge; the second shell is connected with the second end of the middle sleeve and is provided with a liquid outlet hole and a second pressure measuring port for mounting a second pressure gauge;
the adjustable flow core includes: the core rod penetrates through the first shell and can rotate relative to the first shell; a guide bar fixed to the second housing and having a guide rail along an axial direction thereof; and the throttling core rod is sleeved on the core rod, is positioned in the middle sleeve and can move to the second shell along the guide rail.
Specifically, the first shell is composed of a first pressing cap with a through hole at the top end and a first connecting sleeve connected with the first pressing cap; the liquid inlet hole and the first pressure measuring port are arranged on the side wall of the first connecting sleeve, which is parallel to the axial direction of the first connecting sleeve; the first connecting sleeve is connected with the first end of the middle sleeve.
Specifically, the second shell is composed of a second pressure cap with a through hole at the top end and a second connecting sleeve connected with the second pressure cap; the liquid outlet and the second pressure measuring port are arranged on the side wall of the second connecting sleeve, which is parallel to the axial direction of the second connecting sleeve; the second connecting sleeve is connected with the second end of the middle sleeve.
More specifically, the core rod comprises a flow regulating rod penetrating through the through hole of the second pressing cap and a main core rod fixedly connected with the flow regulating rod.
More specifically, the apparatus for preparing polymer further comprises: the first spring is sleeved on the main core rod; the first end of the first spring props against the end face of the flow regulating rod, and the second end of the first spring is fixed on the main core rod.
More specifically, a concave hole is formed at the first end of the guide rod; the second end of the main core rod is inserted into the concave hole.
Preferably, the apparatus for preparing polymer further comprises: the second spring is sleeved on one end, far away from the throttling core rod, of the guide rod; one end of the second spring, which is far away from the throttling core rod, is fixed on the guide rod.
Specifically, the throttle core rod is a pipe body structure in which a plurality of shuttle balls are arranged along the axial direction of the throttle core rod.
Preferably, the first production gate and the casing gate are connected through a first pipeline, and a first valve is arranged on the first pipeline; the liquid inlet hole is connected with the liquid inlet end of the first valve through a second pipeline; the liquid outlet hole is connected with the liquid outlet end of the first valve through a third pipeline; a second valve is arranged on the second pipeline; and a third valve is arranged on the third pipeline.
More preferably, the first pipeline, the second pipeline and the third pipeline are all formed by connecting an oil pipe short section and a movable elbow through an union.
More specifically, a first sampling valve is arranged on the second pipeline between the second valve and the liquid inlet hole and close to the liquid inlet hole; and a second sampling valve is arranged on the third pipeline between the third valve and the liquid outlet hole and close to the liquid outlet hole.
The technical scheme provided by the embodiment of the invention has the beneficial effects that:
(1) the polymer preparation condition is detected by directly utilizing the on-site polymer injection well, a polymer solution is not required to be additionally prepared in the detection process, the detected polymer is directly injected into the polymer injection well, no polymer waste liquid is generated, and no reagent waste and environmental pollution are caused.
(2) The type, performance parameters, detection conditions and the like of the used polymer are the same as the actual injection conditions of the on-site polymer injection well, the detection result is real and reliable, the accuracy is high, and the polymer preparation device can meet the mechanical shearing performance detection requirements of adjustable throttling cores of various specifications on the polymer under different displacement conditions.
(3) The device for detecting the polymer matching and gathering conditions on site has the advantages of simple structure, low cost, convenient replacement of the adjustable flow core, safe and reliable whole detection process, simple and convenient operation, easy control and high working efficiency.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of an apparatus for in situ testing of polymer complexation conditions, according to an exemplary embodiment of the present invention;
FIG. 2 is a schematic diagram of a dispensing apparatus in an apparatus for in situ testing of polymer dispensing conditions in accordance with an exemplary embodiment of the present invention;
the reference numerals in the drawings denote:
1. a Christmas tree; 101. a first production gate; 102. a casing gate; 103. a second production gate; 104. a main gate; 2. a flow distributor; 3. a polymer preparation device; 31. a housing; 301. a first housing; 3011. a first press cap; 3012. a first connecting sleeve; 30121. a liquid inlet hole; 30122. a first pressure port; 302 an intermediate sleeve; 303. a second housing; 3031. a second press cap; 3032. a second connecting sleeve; 32. an adjustable flow core; 30321. a liquid outlet hole; 30322. a second pressure port; 304. a core bar; 3041. a flow regulating rod; 3042. a main core bar; 305. a guide bar; 3051. a guide rail; 3052. concave holes; 306. a throttle core rod; 307. a first spring; 308. a second spring; 4. a first pressure gauge; 5. a second pressure gauge; 6. a first pipeline; 7. a second pipeline; 8. a third pipeline; 9. a first sampling valve; 10. a second sampling valve; 11. a polymer injection well; v1, first valve; v2, second valve; v3 and a third valve.
Detailed Description
In order to make the technical solutions and advantages of the present invention clearer, the following will describe embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of an apparatus for in-situ detection of polymer complexation conditions according to an exemplary embodiment of the present invention. Referring to fig. 1 and 2, the present invention provides an apparatus for in-situ detecting a polymer complexation condition, comprising:
a tree 1 with a first production gate 101 and a casing gate 102 for injection wells;
a flow distributor 2 connected to the christmas tree; and
the liquid inlet 30121 is connected with the first production gate 101, and the liquid outlet 30321 is connected with the sleeve gate 102;
the polymer dispensing device 3 includes: a housing 31 and an adjustable wick 32;
the housing 31 includes: an intermediate sleeve 302; a first housing 301 connected to a first end of the middle sleeve 302 and having a liquid inlet 30121 and a first pressure port 30122 for mounting a first pressure gauge 4; and a second housing 303 connected to a second end of the intermediate sleeve 302 and having a fluid outlet 30321 and a second pressure port 30322 for mounting a second pressure gauge 5;
the adjustable flow core 32 includes: a core bar 304 which passes through the first housing 301 and is rotatable with respect to the first housing 301; a guide bar 305 fixed to the second housing 303 and having a guide rail 3051 along an axial direction thereof; and a throttling core rod 306 which is sleeved on the core rod 304, is positioned in the middle sleeve 302 and can move to the second shell 303 along the guide rail 3051.
As shown in FIG. 1, the polymer flows from the flow distributor 2 through the first production gate 101, flows into the polymer distribution device 3 from the liquid inlet 30121, and then flows into the polymer injection well 11 from the liquid outlet 30321 through the casing gate 102. The flow distributor can calculate the discharge capacity of the polymer, and in the process of flowing through the polymer distribution device 3, the pressure of the first pressure gauge 4 and the second pressure gauge 5 can be read to calculate the throttling pressure difference, and the viscosity of the polymer in the liquid inlet hole and the liquid outlet hole is measured to calculate the viscosity loss rate of the polymer.
The skilled person can change the discharge capacity of the polymer by adjusting the flow distributor, and the number of the shuttle-shaped balls of the adjustable throttle core in the middle sleeve of the polymer distribution device can change the throttle pressure difference and the viscosity loss rate of the polymer.
As can be seen from the above description, the device for in-situ detecting the polymer complexation condition provided by the present invention has the following beneficial effects:
(1) the polymer preparation condition is detected by directly utilizing the on-site polymer injection well, a polymer solution is not required to be additionally prepared in the detection process, the detected polymer is directly injected into the polymer injection well, no polymer waste liquid is generated, and no reagent waste and environmental pollution are caused.
(2) The type, performance parameters, detection conditions and the like of the used polymer are the same as the actual injection conditions of the on-site polymer injection well, the detection result is real and reliable, the accuracy is high, and the polymer preparation device can meet the mechanical shearing performance detection requirements of adjustable throttling cores of various specifications on the polymer under different displacement conditions.
(3) The device for detecting the polymer matching and gathering conditions on site has the advantages of simple structure, low cost, convenient replacement of the adjustable flow core, safe and reliable whole detection process, simple and convenient operation, easy control and high working efficiency.
The flow distributor may be an automatic flow distributor. The flow distributor 2 communicates with the christmas tree 1 via a second production gate 103. The first pressure gauge 4 and the second pressure gauge 5 may be electronic pressure gauges.
The first and second ends of the components mentioned below are the upper and lower ends, respectively, of the components shown in fig. 2.
The structure of the housing 31 of the dispensing device 3 will be described in detail below.
The housing 31 includes, an intermediate sleeve 302; a first housing 301 connected to a first end of the middle sleeve 302 and having a liquid inlet 30121 and a first pressure port 30122 for mounting a first pressure gauge 4; a second housing 303 coupled to a second end of the intermediate sleeve 302 and having an outlet 30321 and a second pressure port 30322 for mounting a second pressure gauge 5.
As shown in fig. 2, the first housing 301 is composed of a first press cap 3011 having a through hole at the top end and a first connection sleeve 3012 connected to the first press cap 3011; the liquid inlet 30121 and the first pressure measuring port 30122 are arranged on the side wall of the first connecting sleeve 3012 parallel to the axial direction thereof; the first connecting sleeve 3012 is connected to a first end of the intermediate sleeve 302. In which the housing 31 shown in figure 2 has the sealing cap removed from the first gland. The sealing cap and the first pressing cap are fixed on the side walls of the sealing cap and the first pressing cap, which are parallel to the axial direction, through positioning pins.
A seal ring is provided in the through hole of the first press cap 3011 to seal the first press cap 3011 and the core rod 304.
The first pressing cap and the first connecting sleeve can be in threaded connection, specifically, the first pressing cap is provided with an internal thread, and the first end of the first connecting sleeve is provided with an external thread matched with the internal thread of the first pressing cap; the first connecting sleeve and the middle sleeve can be in threaded connection, specifically, the second end of the first connecting sleeve is provided with internal threads, and the first end of the middle sleeve is provided with external threads matched with the internal threads of the second end of the first connecting sleeve.
The second shell 303 is composed of a second pressure cap 3031 with a through hole at the top end and a second connecting sleeve 3032 connected with the second pressure cap 3031; the liquid outlet hole 30321 and the second pressure measuring port 30322 are arranged on the side wall of the second connecting sleeve 3032, which is parallel to the axial direction of the second connecting sleeve; the second connection sleeve 3032 is connected to a second end of the intermediate sleeve 302.
A seal ring is provided in the through hole of the second pressing cap 3031 to seal the second pressing cap 3031 and the guide bar 305.
The second pressure cap and the second connecting sleeve can be in threaded connection, specifically, the second pressure cap is provided with an internal thread, and the second end of the second connecting sleeve is provided with an external thread matched with the internal thread of the second pressure cap; the second connecting sleeve and the middle sleeve can be in threaded connection, specifically, a first end of the second connecting sleeve is provided with internal threads, and a second end of the middle sleeve is provided with external threads matched with the internal threads of the first end of the second connecting sleeve.
The construction of the adjustable core 32 of the dispensing device 3 will be described in detail below.
The adjustable flow core 32 comprises a core rod 304 which passes through the first shell 301 and can rotate relative to the first shell 301 and is arranged in the matching and gathering device; a guide bar 305 fixed to the second housing 303 and having a guide rail 3051 along an axial direction thereof; the core rod 304 is sleeved on the intermediate sleeve 302, and the throttling core rod 306 is movable along the guide rail 3051 to the second shell 303 relative to the core rod 304 and the guide rod 305.
The specific matching manner of the throttle core bar 306 and the guide bar 305 may be that a screw is arranged at the second end of the throttle core bar 306 along the radial direction thereof, and the screw is arranged in the guide rail 3051, so that the throttle core bar 306 can slide along the guide rail 3051 of the guide bar 305.
The specific structure of the core rod 304 may be: the core bar 304 includes a flow regulating rod 3041 passing through the through hole of the second pressing cap 3031 and a main core bar 3042 fixedly connected with the flow regulating rod 3041. In practical applications, the flow regulating rod 3041 coincides with the axis of the main core rod 3042. The second end of the flow regulating rod is provided with a groove along the axis of the flow regulating rod, and the first end of the main core rod is positioned in the groove and fixedly connected with the groove through a positioning pin.
The portion of the core rod 304 inside the intermediate sleeve, i.e., the portion of the main core rod 3042 inside the intermediate sleeve, is provided with threads, and the inner wall of the throttle core rod is provided with external threads matching therewith. As can be understood by those skilled in the art, the pitch of the throttle core bar corresponds to the axial length of the shuttle ball of the throttle core. The moving distance of the shuttle-shaped ball of the throttling core rod can be deduced by rotating the number of turns of the core rod. Therefore, the adjustable throttling core can be adjusted without disassembling the matching and gathering device.
As a modified embodiment of the dispensing device 3, the dispensing device 3 further includes: a first spring 307 fitted over the main core rod 3042; the first spring 307 has a first end abutting against an end surface of the flow control rod 3041 and a second end fixed to the main core rod 3042. The torsion of the first spring can prevent the throttle core rod from tripping after moving to a certain position relative to the main core rod to the guide rod in the rotating process of the core rod.
The concrete connection mode of the core bar 304 and the guide bar 305 is as follows: a concave hole 3052 is formed at the first end of the guide rod 305; the second end of the primary core bar 3042 is inserted into the recess 3052. The core rod 304 coincides with the axis of the guide rod 305, ensuring that the two are fixed in the radial direction, while the core rod 304 is rotatable with respect to the axis of the guide rod 305, and the throttle core rod 306 is movable onto the guide rod 305 in the second housing 303.
As another improved embodiment of the dispensing device 3, the dispensing device 3 further includes: a second spring 308 sleeved on one end of the guide rod 305 far away from the throttle core rod 306; the end of the second spring 308 remote from the throttle core rod 306 is fixed to the guide bar 305. When the throttling core rod moves to the second spring and presses the second spring, the reverse action of the second spring forces the throttling core rod to screw into the main core rod.
The throttle core bar 306 is a pipe body structure in which a plurality of shuttle balls are arranged in the axial direction thereof. For adjustable throttle cores with different specifications, the number of the shuttle-shaped balls of the throttle core rod is different, and the number of the shuttle-shaped balls can be 24 or 18, and the like.
In practical application, the first production gate 101 and the casing gate 102 are connected through a first pipeline 6, and a first valve V1 is arranged on the first pipeline 6; the liquid inlet hole 30121 is connected with the liquid inlet end of the first valve V1 through a second pipeline 7; the liquid outlet hole 30321 is connected with the liquid outlet end of the first valve V1 through a third pipeline 8; a second valve V2 is arranged on the second pipeline 7; a third valve V3 is arranged on the third pipeline 8. The polymer can be injected into the polymer injection well through a pipeline formed by the flow distributor, the second production gate, the first pipeline and the sleeve gate, so that the switching times of the main gate are reduced, the service life of the main gate is prolonged, and the normal production of the polymer injection well is not influenced in the whole detection process.
In order to facilitate the disassembly and assembly of the first pipeline 6, the second pipeline 7 and the third pipeline 8, the first pipeline 6, the second pipeline 7 and the third pipeline 8 are all formed by connecting oil pipe short sections with movable elbows through union joints. The method has the advantages that the ground flow is flexibly connected with the existing wellhead Christmas tree, and the adaptability is high.
In order to facilitate the sampling detection of the polymer, a first sampling valve 9 is arranged on the second pipeline 7 between the second valve V2 and the liquid inlet hole 30121 and close to the liquid inlet hole 30121; a second sampling valve 10 is arranged in the third line 8 between the third valve V3 and the outlet opening 30321, close to the outlet opening 30321.
When the preferred embodiments in some of the above examples are implemented in combination, it is possible to use the following embodiments as shown in fig. 1:
a tree 1 with a first production gate 101 and a casing gate 102 for injection wells;
the first production gate 101 and the casing gate 102 are connected by a first pipeline 6, and a first valve V1 is arranged on the first pipeline 6;
a flow distributor 2 connected to the christmas tree; and
the liquid inlet hole 70121 is connected with the liquid inlet end of the first valve V1 through a second pipeline 5 with a second valve V2, and the liquid outlet hole 70321 is connected with the liquid outlet end of the first valve V1 through a third pipeline 8 with a third valve V3;
the polymer dispensing device 3 includes: a housing 31 and an adjustable wick 32;
the housing 31 includes: an intermediate sleeve 302; a first housing 301 connected to a first end of the middle sleeve 302 and having a liquid inlet 30121 and a first pressure port 30122 for mounting a first pressure gauge 4; and a second housing 303 connected to a second end of the intermediate sleeve 302 and having a fluid outlet 30321 and a second pressure port 30322 for mounting a second pressure gauge 5;
the adjustable flow core 32 includes: a core bar 304 which passes through the first housing 301 and is rotatable with respect to the first housing 301; a guide bar 305 fixed to the second housing 303 and having a guide rail 3051 along an axial direction thereof; and a throttling core bar 306 which is sleeved on the core bar 304, is positioned in the middle sleeve 302 and can move to the second shell 303 along the guide rail 3051;
a first sampling valve 9 is arranged on the second pipeline 7 between the second valve V2 and the liquid inlet hole 30121 and close to the liquid inlet hole 30121; a second sampling valve 10 is arranged on the third pipeline 8 between the third valve V3 and the liquid outlet hole 30321 and close to the liquid outlet hole 30321.
The invention provides an instruction for a device for detecting the polymerization condition of a polymer on site, which comprises the following steps:
1) and selecting a polymer injection well. Before the device for detecting the polymer blending condition on site provided by the invention is used, the polymer injection well site is firstly subjected to pedal exploration, the production running conditions such as a well site, a shaft, a wellhead Christmas tree, pressure, polymer injection quantity and the like are comprehensively analyzed, the number of a detection test well is preferably selected, and the data such as the blending type, the concentration, the molecular weight, the wellhead water injection pressure and the like of the polymer are recorded;
2) and (6) installing. After the polymer injection well is selected, as shown in fig. 1, the device for detecting the polymer matching condition on site provided by the invention is connected. Wherein, the adjustable throttle core of the matching and gathering device is adjusted to the maximum position, namely, the shuttle-shaped ball of the throttle core rod is completely positioned in the middle sleeve;
3) and carrying out pressure testing on the ground. Sequentially opening a second production gate 103, a first production gate 101, a first valve V1 and a casing gate 102, slowly closing a main gate 104, adjusting a flow distributor 2, and testing the pressure of the ground detection process pipeline to the main line pressure, wherein the pressure is stabilized for more than 5 minutes and is not reduced to be qualified; then, the second valve V2 and the third valve V3 are opened slowly in sequence, the first valve V1 is closed slowly, the pressure of the ground detection process pipeline is tested to the main line pressure, and the pressure is stabilized for more than 5 minutes and is not reduced to be qualified;
4) and sampling and inspecting the polymer. And continuously operating for more than 30min until the flow is stable, reading the pressure data displayed by the first pressure gauge 4 and the second pressure gauge 5, respectively sampling for 3 times near the liquid inlet hole and the liquid outlet hole, and checking, wherein the adjacent sampling time interval is not less than 5min, and recording the discharge capacity of the polymer injection well, the pressure data displayed by the first pressure gauge 4 and the second pressure gauge 5, the viscosity data of the polymer before and after passing through the polymer preparation device 3 and the sampling time in detail.
5) And the adjustable flow core 32 is adjusted. Manually rotating the core rod 304, adjusting the position of the adjustable throttle core 32 in the intermediate sleeve 302, and reducing the number of the shuttle-shaped balls of the throttle core rod 306 in the intermediate sleeve 302 by one each time of adjustment; repeating the step 4) until the number of the fusiform balls is reduced to 1;
6) and adjusting the polymer discharge capacity. And (3) sequentially adjusting the automatic flow distributor 2, changing and recording the discharge capacity of the polymer injection well, and repeating the step 3) and the step 4), and sequentially detecting the throttling pressure difference and the polymer viscosity loss rate generated when the shuttle-shaped ball number of the adjustable throttling core 32 is continuously changed under the conditions of different discharge capacities of the polymer.
The throttle pressure difference is the pressure of the first pressure gauge 4-the pressure of the second pressure gauge 5;
the viscosity loss rate of the polymer (viscosity of the polymer at the inlet end-viscosity of the polymer at the outlet end) × 100%/viscosity of the polymer at the inlet end.
7) And replacing the adjustable flow core. After detection is finished, when the adjustable throttle cores of different specifications need to be replaced, the second valve V2 and the third valve V3 are closed in sequence, the first valve V1 is opened, after the injection polymerization is stable, the adjustable throttle cores are replaced, the number of the adjusting shuttle-shaped balls is the largest, namely all the shuttle-shaped balls of the throttle core rod are positioned in the middle sleeve 302;
8) and sampling and inspecting the polymer. Slowly opening the second valve V2 and the third valve V3, slowly closing the first valve V1, and repeating the steps 4), 5) and 6) in sequence;
9) and disassembling the process. And slowly closing the casing gate 102, the third gate V3, the second gate V2 and the first production gate 101 in sequence, slowly opening the main gate 104, recovering the ground injection flow, installing original well instruments, adjusting the flow distributor 2, distributing the injection amount according to the actual geology of the injection well, regulating the tools and recovering the site.
As can be seen from the above description, the apparatus for in-situ detecting the polymer complexation condition provided by the embodiment of the invention has the following beneficial effects:
(1) the polymer preparation condition is detected by directly utilizing the on-site polymer injection well, a polymer solution is not required to be additionally prepared in the detection process, the detected polymer is directly injected into the polymer injection well, no polymer waste liquid is generated, and no reagent waste and environmental pollution are caused.
(2) The type, performance parameters, detection conditions and the like of the used polymer are the same as the actual injection conditions of the on-site polymer injection well, the detection result is real and reliable, the accuracy is high, and the polymer preparation device can meet the mechanical shearing performance detection requirements of adjustable throttling cores of various specifications on the polymer under different displacement conditions.
(3) The device for detecting the polymer matching and gathering conditions on site has the advantages of simple structure, low cost, convenient replacement of the adjustable flow core, safe and reliable whole detection process, simple and convenient operation, easy control and high working efficiency.
(4) The polymer can be injected into the polymer injection well through a pipeline formed by the flow distributor, the second production gate, the first pipeline and the sleeve gate, so that the switching times of the main gate are reduced, the service life of the main gate is prolonged, and the normal production of the polymer injection well is not influenced in the whole detection process.
The above description is only for facilitating the understanding of the technical solutions of the present invention by those skilled in the art, and is not intended to limit the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. An apparatus for in situ testing of polymer complexation conditions, comprising:
a tree (1) for polymer injection wells with a first production gate (101) and a casing gate (102);
a flow distributor (2) connected to the christmas tree; and
the liquid inlet hole (30121) is connected with the first production gate (101), and the liquid outlet hole (30321) is connected with the sleeve gate (102);
the dispensing and gathering device (3) comprises: a shell (31) and an adjustable throttle core (32);
the housing (31) includes: an intermediate sleeve (302); a first shell (301) which is connected with the first end of the middle sleeve (302) and is provided with a liquid inlet hole (30121) and a first pressure measuring port (30122) for installing a first pressure gauge (4); and a second housing (303) connected to a second end of the intermediate sleeve (302) and having an outlet opening (30321) and a second pressure measuring opening (30322) for receiving a second pressure gauge (5);
the adjustable flow core (32) comprises: a core rod (304) which penetrates through the first shell (301) and can rotate relative to the first shell (301); a guide bar (305) fixed to the second housing (303) and having a guide rail (3051) along an axial direction thereof; and the throttling core rod (306) is sleeved on the core rod (304), is positioned in the intermediate sleeve (302) and can move into the second shell (303) along the guide rail (3051).
2. The device according to claim 1, wherein the first housing (301) is composed of a first press cap (3011) having a through hole at the top end and a first connection sleeve (3012) connected to the first press cap (3011); the liquid inlet hole (30121) and the first pressure measuring port (30122) are arranged on the side wall of the first connecting sleeve (3012) which is parallel to the axial direction of the first connecting sleeve; the first connecting sleeve (3012) is connected with a first end of the middle sleeve (302).
3. The device according to claim 1, wherein the second housing (303) is composed of a second pressing cap (3031) with a through hole at the top end and a second connecting sleeve (3032) connected with the second pressing cap (3031); the liquid outlet hole (30321) and the second pressure measuring port (30322) are arranged on the side wall of the second connecting sleeve (3032) parallel to the axial direction of the second connecting sleeve; the second connecting sleeve (3032) is connected with the second end of the middle sleeve (302).
4. A device according to claim 3, wherein the core rod (304) comprises a flow regulating rod (3041) passing through the through hole of the second gland (3031) and a main core rod (3042) fixedly connected with the flow regulating rod (3041).
5. The device according to claim 4, characterized in that said batching device (3) further comprises: a first spring (307) sleeved on the main core rod (3042); the first end of the first spring (307) is abutted against the end face of the flow regulating rod (3041), and the second end of the first spring is fixed on the main core rod (3042).
6. The device according to claim 4, characterized in that the first end of the guide bar (305) is provided with a female hole (3052); the second end of the main core rod (3042) is inserted into the concave hole (3052).
7. The device according to claim 1, characterized in that said batching device (3) further comprises: a second spring (308) sleeved on one end of the guide rod (305) far away from the throttling core rod (306); one end of the second spring (308) far away from the throttle core rod (306) is fixed on the guide rod (305).
8. The device of claim 1, wherein the throttle core (306) is a tubular body structure having a plurality of shuttle balls arranged along an axial direction thereof.
9. The apparatus according to claim 1, characterized in that the first production gate (101) and the casing gate (102) are connected by a first line (6) and a first valve (V1) is arranged on the first line (6); the liquid inlet hole (30121) is connected with the liquid inlet end of the first valve (V1) through a second pipeline (7); the liquid outlet hole (30321) is connected with the liquid outlet end of the first valve (V1) through a third pipeline (8); a second valve (V2) is arranged on the second pipeline (7); and a third valve (V3) is arranged on the third pipeline (8).
10. The device according to claim 9, characterized in that the first (6), second (7) and third (8) pipes are each formed by connecting a tubing nipple with a movable elbow via a union.
11. The apparatus according to any of claims 9 or 10, characterized in that a first sampling valve (9) is arranged on the second line (7) between the second valve (V2) and the liquid inlet orifice (30121) close to the liquid inlet orifice (30121); a second sampling valve (10) is arranged on the third pipeline (8) which is arranged between the third valve (V3) and the liquid outlet hole (30321) and is close to the liquid outlet hole (30321).
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| CN201611254543.1A CN108266168B (en) | 2016-12-30 | 2016-12-30 | Device for detecting polymer matching and gathering conditions on site |
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| CN201611254543.1A CN108266168B (en) | 2016-12-30 | 2016-12-30 | Device for detecting polymer matching and gathering conditions on site |
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| CN108266168B true CN108266168B (en) | 2020-06-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109758958A (en) * | 2018-09-17 | 2019-05-17 | 中国石油天然气股份有限公司 | Aqueous solutions of polymers device for formulating and method for polymer flooding |
| CN111119810B (en) * | 2019-12-17 | 2020-09-22 | 东北石油大学 | Indoor comprehensive simulation device for underground fine separated injection |
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| US3974876A (en) * | 1975-09-15 | 1976-08-17 | Taylor Julian S | Downhole fluid flow regulator |
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