CN203729962U

CN203729962U - Underground oil storage type oil exploitation system

Info

Publication number: CN203729962U
Application number: CN201420114798.8U
Authority: CN
Inventors: 宁建峰; 宁天骄; 宁海燕
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-03-14
Filing date: 2014-03-14
Publication date: 2014-07-23
Anticipated expiration: 2024-03-14

Abstract

The utility model relates to an underground oil storage type oil exploitation system and belongs to the oil exploitation field. The underground oil storage type oil exploitation system comprises a number 1 area, an oil channel and a number 2 area. One end of the number 1 area of a circulation type structure is communicated with a unite station through an oil pipeline, and the other end of the number 1 area is connected with an upper end of the oil channel. The lower end of the oil channel is connected with the number 2 area which is of a horizontal tunnel type structure and provided with a downhole area on one side and a buffer area on the other side. The bottomhole area is corresponding and perpendicular to the oil channel and provided with an automatic valve on one side adjacent to the buffer area thereof. A sand filter device is arranged in the buffer area. The other side of the buffer area is communicated with the bottom of an underground oil reservoir through a corresponding pipeline, and the top of the underground oil reservoir is communicated with a corresponding infusion system. In application of the underground oil storage type oil exploitation system, exploitation cost is effectively decreased and crude oil recovery ratio is increased.

Description

A kind of underground oil-storing petroleum production system

[technical field]

The utility model relates to field of petroleum exploitation, especially relates to a kind of underground oil-storing petroleum production system that utilizes underground drainage to carry out recover petroleum.

[background technology]

Known, existing oil exploitation technology is all on oil field, to set up a large amount of oil wells and relevant corollary system, then in the mode of blowing or mechanical oil recovery, crude oil is given rise to ground, via mining site oil-gas gathering and transportation system, the output object of each well is collected, measured and transfer to Combined Treatment station again, carry out oil and gas and water and be defeated by user from just producing qualified crude oil after the processing of the techniques such as, desanding; In practice, the exploitation link of these complexity has directly caused the existing system facility for recover petroleum of a great variety, complex structure and more expensive; In addition, to when winter or cold weather, the not only meeting of the crude oil fluidity in these system pipelines variation, but also may there is the phenomenon of frost crack pipe, therefore,, in order to prevent frost crack pipe and to increase the mobility of crude oil, conventionally all to heat or mix oil, the technique such as water dilution conveying, but because these ground systems are huge and complicated, so again increase the cost of winning in oil field;

On the other hand, the oil field of now having gone into operation due to China is most, and what implement is all water flooding recovery method, is exactly to water filling in oil field, with water drive oil, thereby reach exploitation object, therefore, in the process of whole exploitation, from oil well, the water of extraction is to grow out of nothing, from low to high, finally reach the moisture limit, and simultaneously, crude oil yield is from high to low, progressively decline, and till dropping to always and there is no economic benefit, the change of production in oil field and well water rise closely related; At present, according to the mining Practice of onshore oil field, water flooding recovery oil field can be divided into four-stage, that is: the first stage, not moisture to low water-cut stage, its water content is < 25%; Second stage, middle water-cut stage, its water content is 25%～75%; Phase III, high water-cut stage, its water content is 75%～90%; Fourth stage, ultra-high water-containing stage, its water content is > 90%; Hence one can see that, in the time that well water is 25%, 3 tons of crude oil of every extraction, simultaneously 1 ton of water of extraction, when Water-Content Rise is to 50% time, 1 ton of crude oil of every extraction, simultaneously 1 ton of water of extraction, and when Water-Content Rise is to 75% time, 1 ton of crude oil of every extraction, simultaneously will 3 tons of water of extraction, the ultra-high water-containing amount and the low recovery ratio that in existing water flooding recovery process, occur are a great problems in oilfield exploitation; In addition, also have a kind of for exploiting the thermal recovery processes of the viscous crude that viscosity is higher, it is to utilize to reduce viscosity of crude, improve oil recovery factor by mechanism such as rock and thermal expansion or steam distillations, but, the method still can cause in actual applications a large amount of viscous crude be detained underground cannot extraction.

[summary of the invention]

In order to overcome the deficiency in background technology, the utility model discloses a kind of underground oil-storing petroleum production system that a large amount of oil wells and relevant ground corollary system just can be exploited underground oil that do not need to set up.

For achieving the above object, the utility model adopts following technical scheme:

A kind of underground oil-storing petroleum production system, described system is positioned at underground, and comprises district, oil pipeline, oil channel, No. two districts, shaft bottom district, buffer area, automatic gate, filtering sand apparatus and ancillary facilities; Described district's correspondence is positioned at a upper lateral part of underground reservoir, and be made as circulation type structure, the one end in a district is communicated with the multi-purpose station being positioned on the ground by oil pipeline, and the other end in a district is by being provided with the pipeline of automatic valve and the upper end of oil channel is connected; Described oil channel is made as vertical stratification, and the lower end of oil channel is communicated with No. two districts; No. two described district's correspondences are positioned at the bottom at underground reservoir edge, and are made as the tunnel structure of level, are provided with the shaft bottom district of a depression under a side in No. two districts, and the opposite side in No. two districts is made as buffer area; Described shaft bottom district is corresponding with oil channel vertical, and is provided with an automatic gate between shaft bottom area edge and adjacent buffer area one side; Described buffer area inner bottom part is at least provided with two place's filtering sand apparatus, and the opposite side of buffer area is communicated with the bottom of underground reservoir by corresponding drainage well, and the top of underground reservoir is communicated with corresponding drainage well; The position of the described corresponding automatic valve in a district is provided with the first area of space, the position on corresponding automatic gate top, No. two districts is provided with second space region, in these two area of space, be equipped with for detection of the ancillary facility of safeguarding described system appropriate section, and these two area of space are all communicated with the control room that is located at ground.

Described underground oil-storing petroleum production system, a described district is positioned at left and right, ten meters, earth's surface.

Described underground oil-storing petroleum production system, the joint portion of a described district and oil pipeline is provided with the related facility for pumping and metering.

Described underground oil-storing petroleum production system, the bottom at described No. two districts and underground reservoir edge is at a distance of more than 20 meters, and the top surface in No. two districts is at least than the low five meters of left and right of the bottom faces of underground reservoir.

Described underground oil-storing petroleum production system, is provided with shaft bottom district under the central part in No. two described districts, establishes respectively a buffer area in the both sides in shaft bottom district, and the outside of these two buffer areas is all communicated with the bottom of underground reservoir by corresponding drainage well.

Described petroleum production system, described automatic gate is made as bottom-open type structure.

Owing to adopting technical scheme as above, the utlity model has following beneficial effect:

Underground oil-storing petroleum production system described in the utility model is not only simple in structure, easy operating, but also can effectively reduce cost of winning and improve oil recovery factor; Described petroleum production system adopts the mining type of underground drainage well, be that described system makes full use of formation water and in water filling or exploitation via steam injection process, leaks into No. two oil water mixtures in district and implemented underground drainage, retaining, held separating of oil, filter sand and oil, water, and can make crude oil floatingly under buoyancy of water effect be lifted to a district and to be delivered to multi-purpose station, and then effectively raise the recovery ratio of crude oil; In addition, because described system does not need to install conventional oil production equipment and corollary system, just can the oil water mixture that be flowed into No. two districts by underground reservoir be introduced to a district and be delivered to multi-purpose station by oil channel, therefore, described system not only can realize oil field underground oil recovery, hold the defeated integrated exploitation of oil, underground water-oil separating, lifting and collection, and saved infusion of financial resources for exploitation side greatly, reduce cost of winning and increased economic benefit.

[brief description of the drawings]

Fig. 1 is schematic diagram of the present utility model;

Fig. 2 is another structural representation of the present utility model.

In figure: 1 a, district; 2, underground reservoir; 3, oil pipeline; 4, multi-purpose station; 5, automatic valve; 6, oil channel; 7, No. two districts; 8, shaft bottom district; 9, buffer area; 10, automatic gate; 11, filtering sand apparatus; 12, drainage well; 13, the first area of space; 14, second space region; 15, control room.

[detailed description of the invention]

Can explain in more detail the utility model by the following examples, open the purpose of this utility model is intended to protect all changes and improvements within the scope of the utility model, and the utility model is not limited to the following examples:

Underground oil-storing petroleum production system described in 1～2 by reference to the accompanying drawings, described system is positioned at underground, and comprises district 1, oil pipeline 3, oil channel 6, No. two districts 7, shaft bottom district 8, buffer area 9, automatic gate 10, filtering sand apparatus 11 and ancillary facilities 15; Described district's 1 correspondence is positioned at a upper lateral part of underground reservoir 2, and is made as circulation type structure, thereby is convenient to transport to multi-purpose station 4 by the crude oil in No. two district's 7 liftings; As required, a district 1 can be arranged to left and right, ten meters, earth's surface, and the one end in a district 1 is communicated with multi-purpose station 4 by oil pipeline 3, the other end in a district 1 is connected with the upper end of oil channel 6 by the pipeline that is provided with automatic valve 5; As required, can be provided for the corresponding establishment of pumping and metering with the joint portion of oil pipeline 3 in district 1, utilize this facility measure and the object of pumping the crude oil of transporting to multi-purpose station 4 by district 1 thereby reach; Described oil channel 6 is made as vertical stratification, and the lower end of oil channel 6 is communicated with No. two districts 7, and No. two districts 7 can be lifted to district 1 No. one by crude oil by oil channel 6; No. two described district's 7 correspondences are positioned at the bottom of underground reservoir 2, and are made as the tunnel structure of level, thereby can utilize both potential differences, and the drop between both position height makes No. two districts 7 of crude oil automatic stream of underground reservoir 2; As required, described No. two districts 7 and underground reservoir 2 are at a distance of more than 20 meters, and the top surface in No. two districts 7 is at least than the low five meters of left and right of the bottom faces of underground reservoir 2, thereby reach in utilizing these interval regions to ensure underground reservoir 2 and No. two district's 7 safety, also effectively guaranteed that the crude oil of underground reservoir 2 can flow to district 7 smoothly No. two;

Under one side in No. two districts 7, be provided with the shaft bottom district 8 of a depression, the effect in this shaft bottom district 8 is that crude oil and moisture are left, and is lifted to the object in a district 1 thereby reach by floating at the crude oil on upper strata; The opposite side in No. two districts 7 is made as buffer area 9, utilizes buffer area 9 to cushion the oil water mixture that flows to shaft bottom district 8, thereby has effectively avoided the situation that causes crude oil to be difficult for separating with water because oil water mixture flow velocity is too fast to occur; Described shaft bottom district 8 is corresponding with oil channel 6 vertical, can directly be lifted to district 1 No. one by oil channel 6 thereby be convenient to showy crude oil; Between 8 edges, shaft bottom district and a side of adjacent buffer area 9, be provided with an automatic gate 10, utilize automatic gate 10 to reach and effectively hold oil and control the flow direction of oil water mixture, the object of flow velocity; Flow into shaft bottom district 8 for being further convenient to crude oil, described automatic gate 10 can be made as to bottom-open type structure, thereby can upwards rise and close up while closing controlling automatic gate 10, make to leave an intersegmental distance between the upper side of automatic gate 10 and the end face in No. two districts 7, so not only can make to greatest extent the crude oil floating on upper strata flow into shaft bottom district 8 by this spacing reserving, but also reach the object that reduces as far as possible water liquid inflow shaft bottom district 8; In addition, when the water liquid in shaft bottom district 8 accumulates when a certain amount of, can carry out by closing automatic gate 10 the water liquid of out well base area 8, in the time of the hydrocarbon fluids layering in shaft bottom district 8, then open automatic gate 10 buffer area 9 is mixed with the oil water mixture in shaft bottom district 8 and through the floating district 1 that is lifted to No. of oil channel 6;

For reducing the impact of the sand grains containing in oil water mixture to automatic gate 10 and shaft bottom district 8, described buffer area 9 inner bottom parts are at least provided with two place's filtering sand apparatus 11 and filter and stop sand grains; The opposite side of buffer area 9 is communicated with the bottom of underground reservoir 2 by corresponding drainage well 12, and the top of underground reservoir 2 is communicated with corresponding drainage well 12, use conventional method by corresponding drainage well 12 to the interior water filling of underground reservoir 2 or the steam injection displacement of reservoir oil, thereby make the crude oil of underground reservoir 2 can automatically flow into the buffer area 9 in No. two districts 7 along corresponding drainage well 12, and then flow to shaft bottom district 8; As required, shaft bottom district 8 can be set under the central part in No. two districts 7, the both sides in shaft bottom district 8 are set to respectively to a buffer area 9, and the outside of these two buffer areas 9 is all communicated with the bottom of underground reservoir 2 by corresponding drainage well 12, thereby be able to utilize two buffer areas 9 of 7 both sides, No. two districts simultaneously underground reservoir 2 to be carried out to Fast Algorithm for Mining, or the object that two adjacent small underground oil reservoirs 2 are exploited simultaneously; For ease of safeguarding, can the first area of space 13 be set in the position of a corresponding automatic valve 5 in district 1, position on corresponding automatic gate 10 tops, No. two districts 7 arranges second space region 14, in these two area of space, be respectively equipped with for detection of the ancillary facility of safeguarding described system appropriate section, simultaneously, these two area of space are all communicated with the control room 15 that is located at ground, are convenient to related personnel and enter these two area of space by control room 15 and safeguard accordingly;

For ensuring safety, described mining system and the quality specifications of ancillary facility all require to build and install according to relevant regulations such as GB 50455-2008 " underground water sealed oil storage in rock caverns design specifications ", TB 10003-2005 " Design of Railway Tunnel specification ", DL/T 5195-2004 " hydraulic tunnel design specifications ", GB 50021-2001 " Code for investigation of geotechnical engineering " and GB 50086-2001 " Technical code for shotcrete rock bolts shore ".

The utility model does not describe part in detail for prior art, therefore the utility model is not described in detail.

Claims

1. a underground oil-storing petroleum production system, it is characterized in that: described system is positioned at underground, and comprise a district (1), oil pipeline (3), oil channel (6), No. two districts (7), shaft bottom district (8), buffer area (9), automatic gate (10), filtering sand apparatus (11) and ancillary facility; A described district (1) correspondence is positioned at a upper lateral part of underground reservoir (2), and be made as circulation type structure, the one end in a district (1) is communicated with the multi-purpose station (4) that is positioned at ground by oil pipeline (3), and the other end in a district (1) is connected with the upper end of oil channel (6) by the pipeline that is provided with automatic valve (5); Described oil channel (6) is made as vertical stratification, and the lower end of oil channel (6) is communicated with No. two districts (7); Described No. two districts (7) correspondence is positioned at the bottom at underground reservoir (2) edge, and be made as the tunnel structure of level, the shaft bottom district (8) that is provided with a depression under one side in No. two districts (7), the opposite side in No. two districts (7) is made as buffer area (9); Described shaft bottom district (8) is corresponding vertical with oil channel (6), and is provided with an automatic gate (10) between (8) edge, shaft bottom district and a side of adjacent buffer area (9); Described buffer area (9) inner bottom part is at least provided with two place's filtering sand apparatus (11), the opposite side of buffer area (9) is communicated with the bottom of underground reservoir (2) by corresponding drainage well (12), and the top of underground reservoir (2) is communicated with corresponding drainage well (12); The position of the described corresponding automatic valve in a district (1) (5) is provided with the first area of space (13), the position on the corresponding automatic gates in No. two districts (7) (10) top is provided with second space region (14), in these two area of space, be equipped with for detection of the ancillary facility of safeguarding described system appropriate section, and these two area of space are all communicated with the control room (15) that is located at ground.

2. underground oil-storing petroleum production system according to claim 1, is characterized in that: a described district (1) is positioned at earth's surface below ten meters.

3. underground oil-storing petroleum production system according to claim 1, is characterized in that: a described district (1) is provided with the related facility for pumping and metering with the joint portion of oil pipeline (3).

4. underground oil-storing petroleum production system according to claim 1, it is characterized in that: the bottom spacing at described No. two districts (7) and underground reservoir (2) edge is more than 20 meters, and the top surface in No. two districts (7) is at least low five meters than the bottom faces of underground reservoir (2).

5. underground oil-storing petroleum production system according to claim 1, it is characterized in that: under the central part in described No. two districts (7), be provided with shaft bottom district (8), in the Ge Weiyi buffer area, both sides (9) of shaft bottom district (8), and the outside of these two buffer areas (9) is all communicated with the bottom of underground reservoir (2) by corresponding drainage well (12).

6. underground oil-storing petroleum production system according to claim 1, is characterized in that: described automatic gate (10) is made as bottom-open type structure.