CN205225215U - A mining device for layered mining of two sets of oil layers - Google Patents

Abstract

The utility model provides an exploitation device for two sets of oil reservoir separate layer exploitation, including sleeve pipe and the oil pipe of cover in the sleeve pipe, be equipped with the oil recovery mouth that corresponds the oil recovery section and the water filling port that corresponds the water injection section on the sleeve pipe, oil pipe includes upper oil pipe, lower oil pipe, sets up the concentric double-barrelled between upper oil pipe and lower oil pipe, the upper end of concentric double-barrelled is connected with the upper oil pipe through Y type joint, and the lower extreme of concentric double-barrelled is connected with lower oil pipe through Y type joint; an upper packer and a lower packer are arranged between the concentric double pipes and the sleeve pipe, the upper packer is positioned on the upper parts of the concentric double pipes, and the lower packer is positioned between the oil production section and the water injection section. The utility model discloses can reduce the quantity of digging a well when the exploitation, save the drilling cost, the oil deposit realizes evenly using simultaneously, is favorable to increasing oil field cumulative oil production and enhanced recovery ratio, has avoided the interlaminar interference that vertical system of strata or strata multi-layer combined production produced.

Description

A mining device for layered mining of two sets of oil layers

technical field

The utility model relates to the layered mining technology in the technical field of oilfield development, in particular to a mining device for layered mining of two sets of oil layers.

Background technique

The implementation of layered production is the fundamental measure to adjust the differences between layers in multi-layer reservoirs. The characteristics of reservoirs in onshore oilfields determine that layered extraction must be implemented. Layered production technology includes three types of development technology: layered water injection technology, layered oil recovery and injection-production in the same well.

Layered water injection is the main technology of layered development at present by controlling water injection into high permeability layer and strengthening water injection into low permeability layer to improve sweep coefficient.

Most of the layered oil recovery adopts the layered oil recovery technology of the separate pump, which is difficult to eliminate the interlayer interference caused by the bottom hole flow pressure, and it is not inclined to be applied in the field.

Injection and production in the same well refers to the injection of formation water from the produced water layer into its oil layer, which is suitable for special environments such as offshore, polar and arid areas.

Commonly used downhole injection and production in the same well is to separate the produced fluid to a certain extent through downhole complex devices, and then inject the separated oily sewage back into other layers. The same power source drives two pumps for water injection and oil production. In practice, for sand producing oil wells, the separated water and formation sand are usually injected into the water injection layer, which is prone to formation plugging, resulting in a decrease in injection capacity. The downhole recovery rate is low, and the interlayer interference caused by the co-production of multiple oil layers in the vertical layer is large.

Utility model content

The purpose of this utility model is to provide a mining device for layered mining of two sets of oil layers, which can reduce the number of wells drilled during mining, save costs, realize uniform production of oil reservoirs, and help increase the cumulative oil production and The recovery rate is improved, and the interlayer interference caused by the co-production of multiple oil layers in the vertical layer is avoided.

For this reason, the utility model provides a production device for layered production of two sets of oil layers, including a casing and an oil pipe sleeved in the casing, and the casing is provided with an oil production port corresponding to the oil production section and a corresponding water injection The water injection port of the section, the oil pipe includes an upper oil pipe, a lower oil pipe, and a concentric double pipe arranged between the upper oil pipe and the lower oil pipe;

An upper packer and a lower packer are arranged between the concentric double pipe and the casing, the upper packer is located on the upper part of the concentric double pipe, and the lower packer is located between the oil production section and the water injection section;

The concentric double pipe includes an inner pipe and an outer pipe sleeved outside the inner pipe, the upper end of the inner pipe is connected to the upper oil pipe, the lower end of the inner pipe is connected to the lower oil pipe, and a ring is formed between the inner pipe and the outer pipe. A channel, the top end of the annular channel is open, and the opening is an oil outlet.

An oil inlet is opened on the pipe wall of the outer pipe, and the lower end of the annular passage is closed.

The bottom of the lower oil pipe is a slanted point, and the opening of the slanted point is a water outlet.

A through water outlet is opened on the wall of the inner pipe and the outer pipe, and an oil inlet is opened at the lower end of the annular channel.

The bottom end of the lower oil pipe is connected with a plug.

The oil production section is located above the water injection section.

The oil production section is located below the water injection section.

Beneficial effects of the utility model: the utility model provides a mining device for layered mining of two sets of oil layers. A five-point well pattern is adopted for the production well pattern. Any well is oil production in one layer and water injection in the other layer. It is the production well of one layer and the water injection well of the surrounding wells to exploit another layer of wells, forming two sets of independent well spacing. The same five-point injection-production well pattern is used to develop the current target formations respectively. The packer on the production device separates the upper and lower oil layers. The injected water passes through the high-pressure pipeline on the ground and drives the hydraulic motor installed in the downhole through the oil pipe. Lifted to the ground, the injected water enters another layer through the water injection channel to form the water injection layer. The utility model can reduce the number of wells to be drilled and save the cost of drilling. At the same time, the oil reservoir can be produced evenly, which is beneficial to increase the cumulative oil production of the oil field and improve the recovery rate, and avoids the layer formation caused by the combined production of multiple oil layers in the vertical layer. interfering.

The utility model will be described in further detail below in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is a schematic diagram of a first embodiment of a production device used for two sets of oil layer layered production.

Fig. 2 is a schematic diagram of a second embodiment of a production device for layered production of two sets of oil layers.

Fig. 3 is used for the development of two sets of oil layers in separate layers, and the well spacing of each layer is Schematic diagram of five-point injection-production well pattern.

Description of reference signs: 1. Upper oil pipe; 2. Oil outlet; 3. Upper packer; 4. Oil inlet; 5. Outer pipe; 6. Inner pipe; 7. Concentric double pipe; 8. Lower packer Device; 9, lower oil pipe; 10, water outlet; 11, oblique tip; 12, plug; 13, oil production port; 14, water injection port; 15, casing.

detailed description

Example 1:

As shown in Fig. 1 and Fig. 2, the utility model provides a kind of exploitation device that is used for two sets of layered oil layer exploitation, comprises the casing 15 and the oil pipe that is sleeved in the casing 15, and the casing 15 is provided with There is an oil production port 13 corresponding to the oil production section and a water injection port 14 corresponding to the water injection section. The oil pipe includes an upper oil pipe 1, a lower oil pipe 9, and a concentric double pipe 7 arranged between the upper oil pipe 1 and the lower oil pipe 9; the concentric double pipe 7 The upper packer 3 and the lower packer 8 are arranged between the casing 15, the upper packer 3 is located on the upper part of the concentric double pipe 7, and the lower packer 8 is located between the oil production section and the water injection section The concentric double pipe 7 includes an inner pipe 6 and an outer pipe 5 sleeved outside the inner pipe 6. The upper end of the inner pipe 6 is connected with the upper oil pipe 1, and the lower end of the inner pipe 6 is connected with the lower oil pipe 9. An annular passage is formed between the inner pipe 6 and the outer pipe 5. The top end of the annular passage is open, and the opening is the oil outlet 2. Y in Fig. 1 and Fig. 2 is the oil production section, and S is the water injection section.

The surface injected water enters the concentric double pipe 7 from the upper oil pipe 1 through the wellhead, and enters the water injection section through the water injection port 14 for water injection. The oil-water mixture in the oil production section enters the annular space between the casing and the upper oil pipe 1 through the oil production port 13, and is pumped out by the oil well pump.

The production device used for two sets of layered production of oil layers provided by this embodiment, the specific steps are:

Step 1, setting an oil production section and a water injection section in the same well;

Step 2, water flows down from the upper oil pipe 1, enters the inner pipe 6 of the concentric double pipe 7, flows into the water injection port 14 through the water outlet 10, and enters the water injection section for water injection;

Step 3, the oil-water mixture in the oil production section passes through the oil production port 13, flows into the oil inlet 4, enters the annular channel, enters the annular space between the casing 15 and the upper oil pipe 1 through the oil outlet 2, and is pumped by the oil well pump. pull out.

As shown in Figure 3, the production well pattern adopts a five-point well pattern. When drilling, two layers of each well are opened. Any well is one layer of oil production and the other layer of water injection. It is not only the production well of the first layer but also the surrounding The water injection well of another layer of wells is exploited. One well in the center of the square extracts the upper layer to inject the lower layer, and the surrounding four wells extract the lower layer to inject the upper layer. Well spacing is The five-point injection-production well patterns each develop the current target formation.

The utility model provides a mining device for two sets of oil layer layered mining, which can reduce the number of wells drilled during mining, save costs, realize uniform production of oil reservoirs, and help increase the cumulative oil production of oil fields and improve recovery The rate is high, avoiding the interlayer interference caused by the combined production of multiple oil layers in the vertical layer series.

Example 2:

The utility model provides a mining device for layered mining of two sets of oil layers, which includes a casing 15 and an oil pipe sleeved in the casing 15, and the casing 15 is provided with an oil production port 13 and a corresponding oil production section. Corresponding to the water injection port 14 of the water injection section, the oil pipe includes an upper oil pipe 1, a lower oil pipe 9, a concentric double pipe 7 arranged between the upper oil pipe 1 and the lower oil pipe 9, and an upper oil pipe 7 is arranged between the concentric double pipe 7 and the casing 15 A packer 3 and a lower packer 8, the upper packer 3 is located on the upper part of the concentric double pipe 7, and the lower packer 8 is located between the oil production section and the water injection section. The concentric double pipe 7 includes an inner pipe 6 and an outer pipe 5 sleeved outside the inner pipe 6. The upper end of the inner pipe 6 is connected to the upper oil pipe 1 through a Y-shaped joint, and the lower end of the inner pipe 6 is connected to the upper oil pipe 1 through a Y-shaped joint. The lower oil pipe 9 is connected, and an annular channel is formed between the inner pipe 6 and the outer pipe 5 . The top end of the annular channel is open, and the opening is the oil outlet 2 . An oil inlet 4 is opened on the pipe wall of the outer pipe 5, and the lower end of the annular channel is closed.

The bottom of the lower oil pipe 9 is a slanted tip 11 , and the opening of the slanted tip 11 is a water outlet 10 .

The surface injected water enters the inner pipe 6 of the concentric double pipe 7 through the wellhead from the upper oil pipe 1, and enters the water injection section through the water injection port 14 for water injection. The oil-water mixture in the oil production section enters the annular channel through the oil production port 13, and then passes through the oil outlet 2 It enters the annular space between the casing 15 and the upper oil pipe 1, and is drawn out by the oil well pump.

The utility model provides a mining device for layered mining of two sets of oil layers, which can reduce the number of wells drilled during mining, save costs, realize uniform production of oil reservoirs, and help increase the cumulative oil production of oil fields and improve The recovery rate is high, and the interlayer interference caused by the co-production of multiple oil layers in the vertical layer is avoided.

Example 3:

As shown in Figure 1, the utility model provides a production device for layered production of two sets of oil layers, including a casing 15 and an oil pipe sleeved in the casing 15, and the casing 15 is provided with a corresponding oil extraction device. The oil production port 13 of the section and the water injection port 14 of the corresponding water injection section, the oil pipe includes the upper oil pipe 1, the lower oil pipe 9, the concentric double pipe 7 arranged between the upper oil pipe 1 and the lower oil pipe 9, the concentric double pipe 7 and the casing Between 15 there is an upper packer 3 and a lower packer 8, the upper packer 3 is located on the upper part of the concentric double pipe 7, and the lower packer 8 is located between the oil production section and the water injection section. The concentric double pipe 7 includes an inner pipe 6 and an outer pipe 5 sleeved outside the inner pipe 6. The upper end of the inner pipe 6 is connected to the upper oil pipe 1 through a Y-shaped joint, and the lower end of the inner pipe 6 is connected to the upper oil pipe 1 through a Y-shaped joint. The lower oil pipe 9 is connected, and an annular channel is formed between the inner pipe 6 and the outer pipe 5 . The top end of the annular channel is open, and the opening is the oil outlet 2 . An oil inlet 4 is opened on the pipe wall of the outer pipe 5, and the lower end of the annular channel is closed. The oil production section is located above the water injection section.

The above-mentioned upper oil pipe 1, oil outlet 2, upper packer 3, oil inlet 4, concentric double pipe 7, inner pipe 6, outer pipe 5, lower packer 8, Y-shaped joint, lower oil pipe 9 and inclined tip Composition 11 adopts upper and lower pipe strings. The upper packer 3 is located at the top boundary of the oil production section, the lower packer 8 is located between the oil production section and the water injection section, the upper and lower packers 8 are connected by concentric double pipes 7, and the oil production section The liquid enters the annulus of the casing above the upper packer 3 through the annular channel between the inner pipe 6 and the outer pipe 5, and is lifted to the ground. The surface injection water flows into the upper oil pipe 1 through the wellhead, and then enters the concentric double pipe The inner pipe 6 of 7 injects water into the water injection section of the lower layer through the oblique tip 1111 connected to the bottom of the lower oil pipe 9. The length of the concentric double pipe 7 is slightly greater than the distance between the upper packer 3 and the lower packer 8. The concentric double pipe 7 includes an inner pipe 6 and an outer pipe 5. The outer pipe 5 is sleeved on the outside of the inner pipe 6. The upper end of the inner pipe 6 is connected with the upper oil pipe 1 through a Y-shaped joint. The inner pipe The lower end of 6 is connected to the lower oil pipe 9 through a Y-shaped joint, and the oil outlet 2 is located at the upper opening of the annular channel between the inner pipe 6 and the outer pipe 5 of the concentric double pipe 7, and is connected to the oil above the upper packer 3. The hollow portion of the collar forms a through opening.

The surface injected water enters the inner pipe 6 of the concentric double pipe 7 through the wellhead from the upper oil pipe 1, and enters the water injection section through the water injection port 14 for water injection. The oil-water mixture in the oil production section enters the annular channel through the oil production port 13, and then passes through the oil outlet 2 It enters the annular space between the casing 15 and the upper oil pipe 1, and is drawn out by the oil well pump.

Example 4:

As shown in Figure 2, the utility model provides a production device for layered production of two sets of oil layers, including a casing 15 and an oil pipe sleeved in the casing 15, and the casing 15 is provided with a corresponding oil recovery device. The oil production port 13 of the section and the water injection port 14 of the corresponding water injection section, the oil pipe includes the upper oil pipe 1, the lower oil pipe 9, the concentric double pipe 7 arranged between the upper oil pipe 1 and the lower oil pipe 9, the concentric double pipe 7 and the casing Between 15 there is an upper packer 3 and a lower packer 8, the upper packer 3 is located on the upper part of the concentric double pipe 7, and the lower packer 8 is located between the oil production section and the water injection section. The concentric double pipe 7 includes an inner pipe 6 and an outer pipe 5 sleeved outside the inner pipe 6. The upper end of the inner pipe 6 is connected to the upper oil pipe 1 through a Y-shaped joint, and the lower end of the inner pipe 6 is connected to the upper oil pipe 1 through a Y-shaped joint. The lower oil pipe 9 is connected, and an annular channel is formed between the inner pipe 6 and the outer pipe 5 . A through water outlet 10 is opened on the tube wall of the inner tube 6 and the tube wall of the outer tube 5 , and an oil inlet 4 is opened at the lower end of the annular channel. The bottom end of the lower oil pipe 9 is connected with a plug 12 . The oil production section is located below the water injection section.

The above-mentioned upper oil pipe 1, oil outlet 2, upper packer 3, oil inlet 4, concentric double pipe 7 inner pipe 6, outer pipe 5, lower packer 8, Y-shaped joint, lower oil pipe 9 and plug 12 components are used to inject the upper pipe string. The upper packer 3 is located at the top boundary of the water injection section, the lower packer 8 is located between the oil production section and the water injection section, the upper and lower packers 8 are connected by concentric double pipes 7, and the oil production section The liquid enters the annulus of the casing above the upper packer 3 through the annular channel between the inner pipe 6 and the outer pipe 5, and is lifted to the ground. The surface injection water flows into the upper oil pipe 1 through the wellhead, and then enters the concentric double pipe The inner pipe 6 of 7 injects water into the upper water injection section through the water outlet 10 connecting the inner pipe 6 and the outer pipe 5. The length of the concentric double pipe 7 is slightly longer than that between the upper packer 3 and the lower packer 8. The concentric double pipe 7 includes an inner pipe 6 and an outer pipe 5, the outer pipe 5 is sleeved on the outside of the inner pipe 6, and the upper end of the inner pipe 6 is connected to the upper oil pipe 1 through a Y-shaped joint, so The lower end of the inner pipe 6 is connected to the lower oil pipe 9 through a Y-shaped joint, and the oil outlet 2 is located at the upper opening of the annular channel between the inner pipe 6 and the outer pipe 5 of the concentric double pipe 7, and is connected to the upper packer 3 The annular part of the oil sleeve above forms a through hole.

The utility model provides a mining device for layered mining of two sets of oil layers. A five-point well pattern is adopted for the production well pattern. Any well is oil production in one layer and water injection in the other layer. It is the production well of one layer and the water injection well of the surrounding wells to exploit another layer of wells, forming two sets of independent well spacing. The same five-point injection-production well pattern is used to develop the current target formations respectively. The packer on the production device separates the upper and lower oil layers. The injected water passes through the high-pressure pipeline on the ground and drives the hydraulic motor installed in the downhole through the oil pipe. Lifted to the ground, the injected water enters another layer through the water injection channel to form the water injection layer. The utility model can reduce the number of wells to be drilled and save the cost of drilling. At the same time, the oil reservoir can be produced evenly, which is beneficial to increase the cumulative oil production of the oil field and improve the recovery rate, and avoids the layer formation caused by the combined production of multiple oil layers in the vertical layer. interfering.

The above examples are only illustrations of the utility model, and do not constitute a limitation to the protection scope of the utility model. All designs identical or similar to the utility model all belong to the protection scope of the utility model.

Claims (7)

1. the quarrying apparatus for two cover oil reservoir separate zone productions, the oil pipe comprising sleeve pipe (15) and be set in sleeve pipe (15), it is characterized in that, described sleeve pipe (15) offers the production ports (13) of corresponding oil recovery section and the water filling port (14) of corresponding water filling section, described oil pipe comprises oil pipe (1), lower oil pipe (9), is arranged on concentric double pipe (7) between oil pipe (1) and lower oil pipe (9);

Be provided with upper packer (3) and lower packet (8) between concentric double pipe (7) and sleeve pipe (15), described upper packer (3) is positioned at the top of concentric double pipe (7), lower packet (8) position between oil recovery section and water filling section;

Described concentric double pipe (7) comprises interior pipe (6) and is set in the outside outer tube (5) of interior pipe (6), the upper end of described interior pipe (6) is connected with upper oil pipe (1), the lower end of interior pipe (6) is connected with lower oil pipe (9), circular passage is formed between described interior pipe (6) and outer tube (5), the top end opening of described circular passage, and described opening is oil-out (2).

2. a kind of quarrying apparatus for two cover oil reservoir separate zone productions as claimed in claim 1, is characterized in that, the tube wall of described outer tube (5) offers oil-in (4), and the lower end closed of circular passage.

3. a kind of quarrying apparatus for two cover oil reservoir separate zone productions as claimed in claim 1, is characterized in that, the bottom of described lower oil pipe (9) be oblique point (11), and tiltedly the opening part of sharp (11) is delivery port (10).

4. a kind of quarrying apparatus for two cover oil reservoir separate zone productions as claimed in claim 3, it is characterized in that, offer through delivery port (10) on the tube wall of described interior pipe (6) He on outer tube (5) tube wall, and the lower end of circular passage offers oil-in (4).

5. a kind of quarrying apparatus for two cover oil reservoir separate zone productions as claimed in claim 4, it is characterized in that, the bottom of described lower oil pipe (9) is connected with plug (12).

6. a kind of quarrying apparatus for two cover oil reservoir separate zone productions as claimed in claim 3, it is characterized in that, described oil recovery section is positioned at the top of water filling section.

7. a kind of quarrying apparatus for two cover oil reservoir separate zone productions as claimed in claim 5, it is characterized in that, described oil recovery section is positioned at the below of water filling section.