CN212837740U - Multi-round steam injection energy-saving process pipe column for sensitive heavy oil reservoir - Google Patents
Multi-round steam injection energy-saving process pipe column for sensitive heavy oil reservoir Download PDFInfo
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- CN212837740U CN212837740U CN202020791925.3U CN202020791925U CN212837740U CN 212837740 U CN212837740 U CN 212837740U CN 202020791925 U CN202020791925 U CN 202020791925U CN 212837740 U CN212837740 U CN 212837740U
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Abstract
The utility model discloses a sensitive viscous crude oil reservoir is with energy-conserving technology tubular column of multiple round of gas injection, include: the upper end of a central pipe of the plug packer is connected with a lower port of the sealing plug; and the sealing insertion pipe is inserted into the sealing plug from the upper port of the sealing plug. The sealing insertion tube is composed of an upper part structure and a lower part structure which are integrated, wherein the upper part structure is a cylindrical tube, the lower part structure is a conical tube, and the conical tube is inserted into the sealing plug. The utility model discloses can guarantee the straight inclined shaft steam injection effect of viscous crude oil reservoir, solve and annotate the steam thermal recovery in-process and lead to the problem of the quick clay inflation of sensitivity viscous crude oil reservoir water, cold injury because of killing well, well-flushing liquid.
Description
Technical Field
The utility model belongs to the technical field of the steam technique tubular column technique is annotated in the oil field and specifically relates to a sensitivity viscous crude oil reservoir is with energy-conserving technology tubular column of multiple round of notes vapour.
Background
The heavy oil reservoirs are of various types and have complex geological conditions, and the underground crude oil has high viscosity and poor fluidity, so that the natural energy exploitation effect is poor. The thick oil has larger sensitivity to the temperature, and theoretical research shows that the viscosity is reduced by half for every 10 degrees of temperature rise. The steam stimulation method is to inject a certain amount of high-temperature and high-pressure saturated steam into the oil layer, soak the oil layer for a period of time, heat the crude oil in the oil layer, and then open the well for recovery. On-site practice proves that steam injection of heavy oil is an effective technology for improving the recovery ratio of a heavy oil reservoir.
The steam injection pipe column of the straight inclined well commonly used at present is of a horn mouth type, namely the lower end of the heat insulation oil pipe is connected with a horn mouth to perform steam injection operation, the original pipe column is used for blowout after the well stewing is completed, the original pipe column is taken out after the well washing during the pumping rotation, and the production pipe column is put into the well to perform oil extraction. On one hand, the steam injection pipe column has large heat loss of a shaft in the steam injection process, on the other hand, because the steam injection of the heavy oil reservoir belongs to depletion exploitation, the problem of serious stratum energy deficit generally exists, and the stratum leakage in the process of pumping and flushing is serious, so that the water-sensitive clay expansion and cold damage of the sensitive heavy oil reservoir are serious, and the effect after steam injection and pumping is influenced.
Publication (announcement) number-CN 205189842U, publication (announcement) date 2016.04.27 discloses steam is taked in and send out sand washing integration tubular column, including the sand control tubular column, sand control tubular column bottom is close to the oil reservoir position and sets up the sand screen to the inside intubate that sets up of sand control tubular column, the sealed tube is connected to the intubate upper end, be sealing state between sealed tube and the sand control tubular column. The outer wall of the sealing pipe is provided with a sealing groove, and a sealing ring is arranged in the sealing groove and sealed in the inner cavity of the sand-proof pipe column. The cannula is a ferrule-less cannula. And the bottom end of the insertion pipe is lowered to the bottom of the sand filter pipe and is sealed and injected with steam over an oil layer. The upper end of the sealing pipe is sequentially connected with an injection and production pump and an oil pipe to form injection and production integration. The utility model discloses can reduce the steam injection oil recovery heat loss, retrench sand washing process, shorten the operation by a wide margin and account for the time of producing. The device realizes the speed and efficiency improvement of thermal recovery operation, and has convenient use and good safety.
Publication (bulletin) No. CN209195386U, publication (bulletin) No. 2019.08.02 provides a thermal production string to improve the safety performance of nitrogen heat insulation assisted steam discharge and injection. The thermal recovery pipe column comprises an outer pipe assembly, the outer pipe assembly comprises a thermal recovery packer which is used for being seated on a sleeve, the thermal recovery packer is provided with an annular nitrogen injection channel communicated from top to bottom in a one-way mode, the outer pipe assembly comprises a central channel and a valve plate which can swing upwards to open the central channel and swing downwards to block the central channel, the thermal recovery pipe column comprises a steam injection inner pipe which is arranged in the central channel in a penetrating mode and pushes the valve plate to swing downwards when moving downwards, and the outer pipe assembly further comprises a reset piece which moves upwards to drive the valve plate to swing after moving on the steam injection inner pipe. If the in-process of annotating vapour appears abnormal conditions, can block up central passage fast through upwards lifting the vapour injection inner tube, prevent in the profit entering central passage in the stratum, the interval distance between nitrogen gas and the steam strengthens moreover, has reduced the calorific loss of steam, need not propose the outer tube subassembly moreover, avoids causing calorific loss.
Open (notice) No. CN210217642U, open (notice) day 2020.03.31 discloses a sand control steam injection sealing plug, including the sliding seal intubate, still include make-up joint, adapter sleeve, sealing washer, make-up joint sets gradually the last central passage and the lower central passage that link up mutually along self axis top-down, and lower central passage upper end forms the ring mesa, and wherein it is unanimous with the external diameter of sliding seal intubate to go up the central passage internal diameter, the sliding seal intubate is inserted in make-up joint, and the length of sliding seal intubate is greater than the length of make-up joint, form annular space between sliding seal intubate outer wall and the central passage inner wall under the make-up joint, this annular space endotheca is equipped with the adapter sleeve, sliding seal intubate outer wall suit sealing washer. The utility model discloses satisfy sealing material and do not have the damage at well entry or sand control in-process, guaranteed that sealed is effective for a long time, avoided a large amount of steam infiltration steam injection tubular column and sleeve pipe annular space, make a large amount of heats meaningless consumption before getting into the oil reservoir, lead to annotating the poor problem of vapour effect.
Technical scheme and the technical problem that will solve and the beneficial effect who produces of above disclosure technique all with the utility model discloses inequality, perhaps technical field or application scenario are different, are directed to the utility model discloses more technical problem and the beneficial effect that will solve, above open technical document all do not have the technological inspiration.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to the above-mentioned defect that prior art exists, provide a sensitive viscous oil reservoir is with energy-conserving technology tubular column of multiple rounds of steam injection, can guarantee the straight inclined shaft steam injection effect of viscous oil reservoir, solve to annotate the steam thermal recovery in-process and lead to the problem of sensitive viscous oil reservoir water sensitive clay inflation, cold injury because of killing well, well-flushing liquid.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a multi-round steam injection energy-saving process pipe column for a sensitive heavy oil reservoir comprises:
the upper end of a central pipe of the plug packer is connected with a lower port of the sealing plug;
and the sealing insertion pipe is inserted into the sealing plug from the upper port of the sealing plug.
Furthermore, the sealing cannula is composed of an upper part structure and a lower part structure which are integrated, wherein the upper part structure is a cylindrical pipe, the lower part structure is a conical pipe, and the conical pipe is inserted into the sealing plug.
Further, the plug packer is a compression packer.
Further, the lower port of the central pipe of the plug packer is connected with the upper port of the tail pipe.
Further, the upper port of the sealed insertion pipe is connected with the lower port of the heat insulation compensator through a short section.
Further, still include well-flushing check valve, well-flushing check valve lower extreme passes through nipple joint connection thermal-insulated compensator up end, and well-flushing check valve upper end is through another nipple joint connection thermal-insulated pipe.
Compared with the prior art, the utility model following beneficial effect has:
(1) in the well washing engineering before the pumping transfer, the check valve can prevent well washing liquid from entering an oil layer, the temperature of the oil layer is kept to the maximum extent, and the steam injection and oil pumping processes of multiple rounds can be realized;
(2) the pumping is simple, the working time and cost are saved, and the well occupying time of the operation is shortened;
(3) during the operation of the circulation, the operation is carried out after the pipe is inserted, and the well-remaining packer plays a role in blowout prevention;
(4) when sand washing is needed, the sand washing switch can be fished out for sand washing;
(5) the sealing element of the product is made of high-temperature-resistant material, can resist the high temperature of 400 ℃, and has stable long-term working state at high temperature and good sealing effect;
(6) the plug packer adopts an energy-saving packer, and the energy-saving packer can improve the heat preservation and dry keeping effects of the heat insulation oil pipe, reduce the heat loss of a shaft and improve the heat energy utilization rate.
Drawings
Fig. 1 is the structure schematic diagram of the utility model relates to a sensitive heavy oil reservoir is with energy-conserving technology tubular column of many rounds of steam injection.
In the figure: the plug packer 1, the sealing insertion pipe 2, the heat insulation compensator 3, the well flushing check valve 4 and the heat insulation pipe 5.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1:
referring to fig. 1, the present invention provides a technical solution:
a multi-round steam injection energy-saving process pipe column for a sensitive heavy oil reservoir comprises:
the plug packer 1 is characterized in that the upper end of a central pipe of the plug packer is connected with the lower port of a sealing plug 6;
and the sealing insertion pipe 2 is inserted into the sealing plug from the upper port of the sealing plug.
Furthermore, the sealing cannula is composed of an upper part structure and a lower part structure which are integrated, wherein the upper part structure is a cylindrical pipe, the lower part structure is a conical pipe, and the conical pipe is inserted into the sealing plug.
Further, the plug packer is a compression packer.
Further, the lower end port of the central pipe of the plug packer is connected with the upper end port of the tail pipe 7.
Further, the upper port of the sealed insertion pipe is connected with the lower port of the heat insulation compensator 3 through a first short section.
Further, still include well-flushing check valve 4, well-flushing check valve lower extreme passes through first nipple joint connection thermal-insulated compensator upper port, and well-flushing check valve upper end passes through second nipple joint and connects thermal-insulated pipe 5.
All the short joints and the tail pipes are in the structural form of heat insulation pipes, namely, the short joints and the tail pipes comprise inner pipes and outer pipes, and heat insulation materials are filled in the annular space between the inner pipes and the outer pipes.
The plug packer is a compression packer, is pressurized by a wellhead pump truck, enables the expansion diameter of the packer to be enlarged so as to realize annular sealing of the oil sleeve, and is connected with a sealing plug at the upper part. Compression packers themselves are conventional in the art and may be used directly. In addition, the oil jacket annulus is a conventional well-known term in the art and will not be described in further detail.
The sealing insertion pipe is a structure with a cylindrical upper part and a conical inner annular lower part, and is inserted into the sealing plug to realize the sealing of the central pipe column.
The heat insulation compensator prevents the phenomenon of expansion with heat and contraction with cold of a pipe column caused by high-temperature steam by utilizing effective telescopic deformation of the main corrugated pipe, and prevents the problem of unsealed pipe column in the steam injection process. The insulated compensator itself is conventional prior art in the art, as is the application.
The well-flushing check valve is a biased ball valve, the wall of the oil pipe is connected by a spring, the ball valve is closed in the steam injection process, and the sleeve liquid inlet opens the ball valve during the reverse well flushing to realize the well-flushing function. The well flushing check valve per se is conventional in the art and can be directly applied.
The heat insulation pipe consists of an inner pipe, an outer pipe and a heat insulation material, so that heat loss is reduced in the steam injection process, and the heat insulation function is realized. The insulated pipe itself is conventional prior art in the field and can be applied directly.
The running process of the pipe column comprises the following steps: firstly, the steam injection energy-saving packer is put in, then the ball is thrown, the seat seal is pressed, the releasing is carried out, the releasing tubular column is taken out, the sealing insertion pipe with the compensator, the well flushing check valve and the heat insulation oil pipe is put in, and the inner cavity of the steam injection energy-saving packer is inserted to realize the sealing of the tubular column. After the process pipe column is lowered to a preset position, high-temperature steam injection operation is carried out on site, soaking for 3-5 days is carried out after steam injection is finished, pressure and temperature diffusion is carried out, flushing is carried out when wellhead pressure is reduced to be below 1MPa, after wellhead pressure is reduced to be 0 and the wellhead does not overflow, the pipe column above the sealed insertion pipe is lifted out, and a production pipe column is lowered for oil extraction.
(1) In the well washing engineering before the pumping transfer, the check valve can prevent well washing liquid from entering an oil layer, the temperature of the oil layer is kept to the maximum extent, and the steam injection and oil pumping processes of multiple rounds can be realized;
(2) the pumping is simple, the working time and cost are saved, and the well occupying time of the operation is shortened;
(3) during the operation of the circulation, the operation is carried out after the pipe is inserted, and the well-remaining packer plays a role in blowout prevention;
(4) when sand washing is needed, the sand washing switch can be fished out for sand washing;
(5) the sealing element of the product is made of high-temperature-resistant material, can resist the high temperature of 400 ℃, and has stable long-term working state at high temperature and good sealing effect;
(6) the plug packer adopts an energy-saving packer, and the energy-saving packer can improve the heat preservation and dry keeping effects of the heat insulation oil pipe, reduce the heat loss of a shaft and improve the heat energy utilization rate.
Example 2:
referring to fig. 1, the present invention provides a technical solution:
a multi-round steam injection energy-saving process pipe column for a sensitive heavy oil reservoir comprises:
the plug packer 1 is characterized in that the upper end of a central pipe of the plug packer is connected with the lower port of a sealing plug 6;
and the sealing insertion pipe 2 is inserted into the sealing plug from the upper port of the sealing plug.
Furthermore, the sealing cannula is composed of an upper part structure and a lower part structure which are integrated, wherein the upper part structure is a cylindrical pipe, the lower part structure is a conical pipe, and the conical pipe is inserted into the sealing plug.
Further, the plug packer is a compression packer.
Although fig. 1 is used for all the above embodiments, it is obvious to those skilled in the art that a separate drawing is not shown as long as the parts or structural features missing in the embodiments are removed from the drawing. As will be clear to the skilled person. Of course, the embodiments with more components are only the preferred embodiments, and the embodiments with fewer components are the basic embodiments, but the basic utility model objects can also be achieved, so all these are within the protection scope of the present invention.
All parts and parts which are not discussed in the present application and the connection mode of all parts and parts in the present application belong to the known technology in the technical field, and are not described again. Such as welding, threaded connections, etc.
In the present application, the term "plurality" means two or more unless expressly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. 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 (6)
1. A sensitive heavy oil reservoir is with energy-conserving technology tubular column of many rounds of steam injection, its characterized in that includes:
the upper end of a central pipe of the plug packer is connected with a lower port of the sealing plug;
and the sealing insertion pipe is inserted into the sealing plug from the upper port of the sealing plug.
2. The multiple-round-steam-injection energy-saving process pipe column for the sensitive heavy oil reservoir according to claim 1 is characterized in that the sealing insertion pipe is composed of an upper part structure and a lower part structure which are integrated, wherein the upper part structure is a cylindrical pipe, the lower part structure is a conical pipe, and the conical pipe is inserted into the sealing plug.
3. The multiple-round steam injection energy-saving process pipe column for the sensitive heavy oil reservoir according to claim 1 or 2, wherein the plug packer is a compression packer.
4. The multiple-round steam injection energy-saving process pipe column for the sensitive heavy oil reservoir according to claim 1 or 2, wherein the lower end port of a central pipe of the plug packer is connected with the upper end port of a tail pipe.
5. The multi-turn steam injection energy-saving process pipe column for the sensitive heavy oil reservoir as claimed in claim 1 or 2, wherein the upper port of the sealing insertion pipe is connected with the lower port of the thermal insulation compensator through a short joint.
6. The energy-saving process pipe column for multiple rounds of steam injection for the sensitive heavy oil reservoir as claimed in claim 5, further comprising a well flushing check valve, wherein the lower end of the well flushing check valve is connected with the upper port of the thermal insulation compensator through a short section, and the upper end of the well flushing check valve is connected with the thermal insulation pipe through another short section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020791925.3U CN212837740U (en) | 2020-05-13 | 2020-05-13 | Multi-round steam injection energy-saving process pipe column for sensitive heavy oil reservoir |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020791925.3U CN212837740U (en) | 2020-05-13 | 2020-05-13 | Multi-round steam injection energy-saving process pipe column for sensitive heavy oil reservoir |
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| Publication Number | Publication Date |
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| CN212837740U true CN212837740U (en) | 2021-03-30 |
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| CN202020791925.3U Active CN212837740U (en) | 2020-05-13 | 2020-05-13 | Multi-round steam injection energy-saving process pipe column for sensitive heavy oil reservoir |
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