CN215595543U - Oil field layering polymer injection well standard wellhead assembly - Google Patents
Oil field layering polymer injection well standard wellhead assembly Download PDFInfo
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Abstract
The left side of a large four-way of a standard well head device of an oilfield layering polymer injection well is connected with a left casing valve, the right side of the large four-way is connected with a casing valve, the upper part of the large four-way is connected with a lower small four-way, the left side of the lower small four-way is connected with a low-pressure water injection valve, the right side of the lower small four-way is connected with a low-pressure layer emptying valve, the upper part of the lower small four-way is sequentially connected with a main valve, an upper small four-way and a testing valve, the right side of the upper small four-way is connected with a high-pressure layer emptying valve, and the left side of the upper small four-way is connected with a high-pressure injection valve; the high-pressure injection valve is sequentially connected with an electromagnetic flowmeter A and an electric regulating valve A of a high-pressure layer injection process through pipelines; the low-pressure water injection valve is sequentially connected with an electromagnetic flowmeter B and an electric regulating valve B of a low-pressure layer injection process through pipelines; the left sleeve valve is connected with the incoming liquid valve after being connected in parallel with the high-pressure layer injection process and the low-pressure layer injection process through pipelines; the low-pressure layer emptying valve, the right sleeve valve and the high-pressure layer emptying valve are respectively connected with the sampling process. The layering is annotated and is gathered effectually, and the sample is accurate.
Description
Technical Field
The utility model relates to the technical field of tertiary oil recovery engineering of polymer injection in an oil field, in particular to a standard wellhead flow device of a polymer injection well in a layered mode in the oil field.
Background
The isolated island oil field is annotated and is gathered well most and adopt the cage system to annotate and gather the mode, because the small bed is many, and the difference between the layers is big, and some well profiles can't improve notes and gather the section, and the cage system is annotated and is gathered and make the oil reservoir use very unbalance, seriously influences notes and gathers the development effect. Research shows that when permeability values of small layers in the longitudinal direction are different by more than two times, the general polymer injection cannot effectively improve an injection profile and enlarge the range and volume of the layers, when a set of development layer series is more in oil layers and the difference of the permeability of the layers is larger, the polymer flooding is difficult to play the advantages of profile control, and the polymer is suddenly advanced along a high permeability layer by adopting the general polymer injection, so that the high polymer channeling of an oil well corresponding to the high permeability layer is caused, and the development effect of the polymer flooding is seriously influenced. In order to reduce the contradiction between the positive polymer injection unit layers, a double-pipe layered polymer injection process is introduced and implemented, the technology can not only avoid or reduce the shearing viscosity reduction and the iron ion damage caused when the polymer flows through the water nozzle to the maximum extent, but also realize the layered quantitative injection of the polymers with different molecular weights and different concentrations, the layered injection amount can be controlled on the ground, the metering is simple, convenient, visual and accurate, the labor intensity of the traditional layered test is reduced, and the interlayer interference caused by a general injection mode can be better solved.
In order to ensure the oil displacement effect of the polymer, the viscosity of the wellhead of all polymer injection wells needs to be sampled and detected every week so as to accurately master the viscosity change conditions of links such as viscosity loss of a ground process flow, working performance of a polymer injection pump, errors of instruments and meters, solution proportioning errors and the like, and provide real injection data for polymer injection production and guidance effect analysis; before sampling, large-discharge emptying is performed to flush impurities adhered to the inner wall of the sampler, the solution is qualified because no foreign matters exist, the emptying amount is about 3-5 times (about 8000 ml) of the inner volume of the sampler, and the emptying liquid is discharged, so that certain pollution is caused to the environment, and cost waste is caused; the sampler body is welded with a 16mm high-pressure short circuit for mounting and dismounting a high-pressure sampling valve. Due to frequent disassembly, the screw thread is easy to wear, the danger of being ejected by high pressure exists when the sampling operation is carried out carelessly, and certain potential safety hazards exist.
In order to meet the requirements of well head flow splitting, single-layer independent adjustment and direct pressure and flow reading of the layered polymer injection well, a standard well head device of the layered polymer injection well of the oil field is developed, the contradiction between polymer injection unit layers is solved, and the polymer injection and oil increasing effect is improved.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects, the utility model provides the standard wellhead device for the oil field layered polymer injection well.
The purpose of the utility model is realized by the following technical scheme:
the utility model comprises the following steps: a standard wellhead assembly for an oilfield stratified polymer injection well, comprising: the system comprises a high-pressure layer injection flow, a low-pressure layer injection flow, a sampling flow, a liquid inlet valve, a low-pressure water injection valve, a low-pressure layer emptying valve, a right sleeve valve, a left sleeve valve, an oil sleeve connecting pipe, a large four-way, a hanger, a lower small four-way, a main valve, an upper small four-way, a high-pressure layer emptying valve, a high-pressure water injection valve, a testing valve and a pipeline; the method is characterized in that: the left side of the large four-way is connected with a left sleeve valve, the right side of the large four-way is connected with a right sleeve valve, the upper part of the large four-way is connected with a lower small four-way, the left side of the lower small four-way is connected with a low-pressure water injection valve, the right side of the lower small four-way is connected with a low-pressure layer emptying valve, the upper part of the lower small four-way is sequentially connected with a main valve, an upper small four-way and a test valve, the right side of the upper small four-way is connected with a high-pressure layer emptying valve, and the left side of the upper small four-way is connected with a high-pressure water injection valve; the high-pressure water injection valve is sequentially connected with an electromagnetic flowmeter A and an electric regulating valve A of a high-pressure layer injection process through pipelines; the low-pressure water injection valve is sequentially connected with an electromagnetic flowmeter B and an electric regulating valve B of a low-pressure layer injection process through pipelines; the left sleeve valve is connected with the incoming liquid valve after being connected in parallel with the high-pressure layer injection process and the low-pressure layer injection process through pipelines; the low-pressure layer emptying valve, the right sleeve valve and the high-pressure layer emptying valve are respectively connected with the sampling process.
Furthermore, a low-pressure layer oil pressure meter is arranged on a pipeline between the low-pressure water injection valve and the electromagnetic flowmeter.
Furthermore, an emptying valve is arranged on a pipeline between the left sleeve valve and the liquid inlet valve.
Further, low pressure layer unloading valve passes through the pipeline and is connected with high pressure layer sample floodgate valve, the circulating valve of sample flow in proper order, is equipped with high pressure sample valve on the high pressure layer sampling tube between high pressure layer sample floodgate valve and the circulating valve, low pressure layer unloading valve passes through the pipeline and is connected with low pressure layer sample floodgate valve, low pressure layer sampling tube, right side sleeve pipe valve passes through the pipeline and is connected with reinjection floodgate valve, reinjection union coupling, and above-mentioned high pressure layer sampling tube, low pressure layer sampling tube, the parallelly connected back of reinjection pipe, the end is equipped with low pressure unloading sample valve.
Furthermore, a sleeve pressure gauge is arranged on a reinjection pipe of the reinjection gate valve.
Furthermore, a hanger is arranged on the lower inner hole of the lower small four-way joint.
In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second", "third", "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third", "fourth" may explicitly or implicitly include at least one such feature.
In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be understood broadly, and for example, may be fixedly connected, or may be detachably connected or integrated; the components can be mechanically connected, directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other or the two components can interact with each other, and unless otherwise specifically limited, the specific meaning of the terms in the present invention can be understood by those skilled in the art according to specific situations.
Compared with the prior art, the utility model has the following beneficial effects:
1. the utility model can avoid or reduce the shearing viscosity reduction and the iron ion damage caused by the polymer flowing through the water nozzle to the utmost extent, realize the layered quantitative injection of the polymers with different molecular weights and different concentrations, the layered injection amount is controlled on the ground, the measurement is simple, convenient, visual and accurate, the labor intensity of the traditional layered test is reduced, the interlayer interference caused by a general injection mode can be better solved, the injection section is effectively improved, the interlayer wave and the volume are enlarged, and the development effect of the polymer injection well is improved;
2. the utility model accords with the high-pressure sampling standard of the well head of the polymer injection well, and the impurities remained in the flow of the well head and the sampler are flushed to the annular space of the oil sleeve in a large discharge amount during sampling, thereby preventing the environment pollution caused by emptying and ensuring the qualified polymer injection sample;
3. the utility model effectively avoids frequent disassembly of the high-pressure sampling valve, is easy to wear the screw thread, has the danger of being ejected out by high pressure without paying attention during sampling operation, is safe to operate and ensures the safe production of oil fields.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that are required to be used in the description of the embodiments will be briefly described below, and the same reference numerals will be used throughout the drawings to designate the same components, which are for the purpose of illustrating the preferred embodiments only and are not to be construed as limiting the present invention.
Fig. 1 is a schematic front view structure of the present invention.
In the figure: 1. high-pressure layer injection process, 101, electric regulating valves A and 102, electromagnetic flow meters A and 103, a high-pressure layer oil pressure meter; 2. a low-pressure layer injection process, 201, electric regulating valves B and 202, electromagnetic flow meters B and 203, a low-pressure layer oil pressure meter; 3. the method comprises the steps of a sampling process, 301, a high-pressure layer sampling gate valve, 302, a low-pressure layer sampling gate valve, 303, a reinjection gate valve, 304, a high-pressure layer sampling pipe, 305, a low-pressure layer sampling pipe, 306, a reinjection pipe, 307, a circulating pipe, 308, a high-pressure sampling valve, 309, a circulating valve, 310, a low-pressure emptying sampling valve and 311, a pressure meter; 4. the system comprises an incoming liquid valve, 5 low-pressure water injection valves, 6 low-pressure layer emptying valves, 7 right sleeve valves, 8 left sleeve valves, 9 oil sleeve connecting pipes and 901 emptying valves; 10. the device comprises a large four-way, 11 parts of a hanger, 12 parts of a lower small four-way, 13 parts of a main valve, 14 parts of an upper small four-way, 15 parts of a high-pressure layer emptying valve, 16 parts of a high-pressure injection valve, 17 parts of a test valve and 18 parts of a pipeline; H. the oil jacket annular space.
Detailed Description
To further explain the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, with the specific understanding that: both a and B may be included, a may be present alone, or B may be present alone, and any of the three cases can be provided.
The utility model will be further described with reference to the following figures and embodiments:
as shown in fig. 1, a standard wellhead device for a layered polymer injection well in an oil field comprises: the system comprises a high-pressure layer injection process 1, a low-pressure layer injection process 2, a sampling process 3, an incoming liquid valve 4, a low-pressure water injection valve 5, a low-pressure layer emptying valve 6, a right sleeve valve 7, a left sleeve valve 8, an oil sleeve connecting pipe 9, a large four-way joint 10, a hanger 11, a lower small four-way joint 12, a main valve 13, an upper small four-way joint 14, a high-pressure layer emptying valve 15, a high-pressure injection valve 16, a test valve 17 and a pipeline 18; the method is characterized in that: the left side of the large four-way joint 10 is connected with a left sleeve valve 8, the right side of the large four-way joint is connected with a right sleeve valve 7, the upper part of the large four-way joint 10 is connected with a lower small four-way joint 12, the left side of the lower small four-way joint 12 is connected with a low-pressure water injection valve 5, the right side of the lower small four-way joint 12 is connected with a low-pressure layer emptying valve 6, the upper part of the lower small four-way joint 12 is sequentially connected with a main valve 13, an upper small four-way joint 14 and a test valve 17, the right side of the upper small four-way joint 14 is connected with a high-pressure layer emptying valve 15, and the left side of the upper small four-way joint 14 is connected with a high-pressure injection valve 16; the high-pressure injection valve 16 is sequentially connected with an electromagnetic flowmeter A102 and an electric regulating valve A101 of the high-pressure layer injection process 1 through a pipeline 18; the low-pressure water injection valve 5 is sequentially connected with an electromagnetic flowmeter B202 and an electric regulating valve B201 of the low-pressure layer injection process 2 through a pipeline 18; the left sleeve valve 8 is connected with the high-pressure layer injection process 1 and the low-pressure layer injection process 2 in parallel through a pipeline 18 and then is connected with the incoming liquid valve 4; the low-pressure layer emptying valve 6, the right sleeve valve 7 and the high-pressure layer emptying valve 15 are respectively connected with the sampling process 3.
Specifically, a low-pressure lamination oil pressure gauge 203 is arranged on the pipeline 18 between the low-pressure water injection valve 5 and the electromagnetic flowmeter 202.
Specifically, a pipeline 18 between the left sleeve valve 8 and the liquid inlet valve 4 is provided with a DN15PN16 emptying valve 901.
Specifically, the low-pressure layer emptying valve 6 is connected with a high-pressure layer sampling gate valve 301 and a circulating valve 309 of the sampling process 3 in sequence through a pipeline 18, a high-pressure sampling valve 308 is arranged on a high-pressure layer sampling pipe 304 between the high-pressure layer sampling gate valve 301 and the circulating valve 309, the outer diameter of the high-pressure layer sampling pipe 304 is 73mm, the inner diameter of the high-pressure layer sampling pipe is 62mm, and the volume of an inner cavity of the high-pressure layer sampling pipe is 1000 plus 1500 ml; a circulation valve 309 for shutting off or dredging the flow path.
The low pressure layer emptying valve 6 is connected with the low pressure layer sampling gate valve 302 and the low pressure layer sampling pipe 305 through a pipeline 18, the right sleeve valve 7 is connected with the reinjection gate valve 303 and connected with the reinjection pipe 306 through the pipeline 18, and after the high pressure layer sampling pipe 304, the low pressure layer sampling pipe 305 and the reinjection pipe 306 are connected in parallel through a circulating pipe 307, the tail end of the high pressure layer sampling pipe is provided with a low pressure emptying sampling valve 310 which is used for emptying, releasing pressure or recording liquid samples in the low pressure layer sampling pipe 305.
Specifically, a sleeve pressure gauge 311 is arranged on the reinjection pipe 306 of the reinjection gate valve 303 and used for detecting the pressure of the annular space of the oil sleeve.
Specifically, a hanger 11 is arranged on a downward inner hole of the lower small four-way 12 and used for hanging an inner pipe of the polymer injection well.
The layered injection mechanism: according to the injection allocation requirements of high and low pressure layers, the injection amount of the injection layer is remotely or locally adjusted by the electric adjusting valve 101, so that the layered injection requirements are met.
The sampling mechanism is as follows: when the polymer injection well is normally injected, the injection pressure of an oil pipe of the well is far higher than the pressure of the annular space H of the oil sleeve, so that the oil field produced water reinjection principle is used for reference, and the requirements of low consumption and environmental protection are met.
Examples
One, normal injection: a standard wellhead device for a layered polymer injection well in an oil field is characterized in that polymer solution is normally injected into the well through an incoming liquid valve 4, an electric regulating valve 101, an electromagnetic flowmeter 102, an oil pressure gauge 103, a high-pressure injection valve 16, a main valve 13 and a hanger 11.
Recording a polymer solution sample: firstly, opening a high-pressure layer emptying valve 15, a high-pressure layer sampling gate valve 301, a circulating valve 309, a reinjection gate valve 303 and a right casing valve 7 in sequence, reinjecting high-pressure polymer solution flowing in a high-pressure layer injection flow 1 into an oil casing annular space H of a well through the high-pressure layer sampling gate valve 301, a high-pressure layer sampling pipe 304, the circulating valve 309, a circulating pipe 307, a reinjection pipe 306, the reinjection gate valve 303 and the right casing valve 7, and injecting impurities adsorbed on the flow pipe wall and the inner cavity of the high-pressure layer sampling pipe 304 into the oil casing annular space H after flowing scouring for a certain time; secondly, closing the circulating valve 309 and the high-pressure layer sampling gate valve 301, opening the high-pressure sampling valve 308, and taking out the polymer solution which is statically reserved in the high-pressure layer sampling pipe 304 in a non-pressure state for detecting viscosity data; thirdly, after the sampling is finished, the low-pressure emptying sampling valve 310 is opened to discharge the residual solution in the sampling process 3, so as to prevent the solution from caking or freezing in winter.
The standard wellhead device for the oil field layered polymer injection well can avoid or reduce the shearing viscosity reduction and iron ion damage caused by polymers flowing through a water nozzle to the maximum extent, realize the layered quantitative injection of the polymers with different molecular weights and different concentrations, control the layered injection amount on the ground, realize simple, visual and accurate measurement, reduce the labor intensity of the traditional layered test, better solve the interlayer interference caused by a general injection mode, effectively improve the injection profile, enlarge the interlayer wave and volume and improve the development effect of the polymer injection well; the high-pressure sampling standard of the wellhead of the polymer injection well is met, and the impurities remained in the wellhead flow and the sampler are flushed to the annular space of the oil sleeve in a large discharge amount during sampling, so that the environment pollution caused by emptying is prevented, and the qualified polymer injection sample is ensured; effectively avoid the high-pressure sampling valve of frequent dismantlement, easily make the screw thread wearing and tearing, careless danger that just can be ejected by the high pressure during sampling operation, operation safety ensures oil field safety in production.
While preferred embodiments of the present invention have been described above, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted to embrace the preferred embodiments and all such variations and modifications as fall within the scope of the utility model.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the utility model. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (6)
1. A standard wellhead assembly for an oilfield stratified polymer injection well, comprising: the device comprises a high-pressure layer injection process (1), a low-pressure layer injection process (2), a sampling process (3), an incoming liquid valve (4), a low-pressure water injection valve (5), a low-pressure layer emptying valve (6), a right sleeve valve (7), a left sleeve valve (8), an oil sleeve connecting pipe (9), a large four-way joint (10), a hanger (11), a lower small four-way joint (12), a main valve (13), an upper small four-way joint (14), a high-pressure layer emptying valve (15), a high-pressure injection valve (16), a test valve (17) and a pipeline (18); the method is characterized in that: the left side of the large four-way joint (10) is connected with a left sleeve valve (8), the right side of the large four-way joint is connected with a sleeve valve (7), the upper part of the large four-way joint (10) is connected with a lower small four-way joint (12), the left side of the lower small four-way joint (12) is connected with a low-pressure water injection valve (5), the right side of the lower small four-way joint (12) is connected with a low-pressure layer emptying valve (6), the upper part of the lower small four-way joint (12) is sequentially connected with a main valve (13), an upper small four-way joint (14) and a test valve (17), the right side of the upper small four-way joint (14) is connected with a high-pressure layer emptying valve (15), and the left side of the upper small four-way joint (14) is connected with a high-pressure injection valve (16); the high-pressure injection valve (16) is sequentially connected with an electromagnetic flowmeter A (102) and an electric regulating valve A (101) of the high-pressure layer injection process (1) through a pipeline (18); the low-pressure water injection valve (5) is sequentially connected with an electromagnetic flowmeter B (202) and an electric adjusting valve B (201) of the low-pressure layer injection process (2) through a pipeline (18); the left sleeve valve (8) is connected with the high-pressure layer injection process (1) and the low-pressure layer injection process (2) in parallel through a pipeline (18) and then is connected with the liquid inlet valve (4); the low-pressure layer emptying valve (6), the right sleeve valve (7) and the high-pressure layer emptying valve (15) are respectively connected with the sampling process (3).
2. The standard wellhead assembly of the oilfield stratified polymer injection well according to claim 1, wherein: and a low-pressure layer oil pressure gauge (203) is arranged on a pipeline (18) between the low-pressure water injection valve (5) and the electromagnetic flowmeter B (202).
3. The standard wellhead assembly of the oilfield stratified polymer injection well according to claim 1, wherein: and an emptying valve (901) is arranged on a pipeline (18) between the left sleeve valve (8) and the liquid inlet valve (4).
4. The standard wellhead assembly of the oilfield stratified polymer injection well according to claim 1, wherein: low-pressure layer unloading valve (6) pass through pipeline (18) and be connected with high-pressure layer sample floodgate valve (301), circulation valve (309) of sample flow (3) in proper order, and high-pressure layer sample floodgate valve (301) and circulation valve (309) between be equipped with high-pressure sample valve (308) on high-pressure layer sampling tube (304), low-pressure layer unloading valve (6) pass through pipeline (18) and low-pressure layer sample floodgate valve (302), low-pressure layer sampling tube (305) are connected, right side sleeve valve (7) pass through pipeline (18) and be connected with reinjection floodgate valve (303), reinjection pipe (306) are connected, above-mentioned high-pressure layer sampling tube (304), low-pressure layer sampling tube (305), reinjection pipe (306) are connected in parallel through circulation pipe (307) after, the end is equipped with low pressure unloading sample valve (310).
5. The standard wellhead assembly of the oilfield stratified polymer injection well according to claim 4, wherein: and a sleeve pressure gauge (311) is arranged on a reinjection pipe (306) of the reinjection gate valve (303).
6. The standard wellhead assembly of the oilfield stratified polymer injection well according to claim 1, wherein: and a hanger (11) is arranged on the downward inner hole of the lower small four-way (12).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121427697.2U CN215595543U (en) | 2021-06-25 | 2021-06-25 | Oil field layering polymer injection well standard wellhead assembly |
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| CN202121427697.2U CN215595543U (en) | 2021-06-25 | 2021-06-25 | Oil field layering polymer injection well standard wellhead assembly |
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