CN108843291A

CN108843291A - Exploitation method and device of low-pressure tight oil reservoir

Info

Publication number: CN108843291A
Application number: CN201810506716.7A
Authority: CN
Inventors: 雷征东; 宋新民; 胡蝶
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2017-11-28
Filing date: 2018-05-24
Publication date: 2018-11-20
Anticipated expiration: 2038-05-24
Also published as: CN108843291B

Abstract

The application provides a method and a device for exploiting a low-pressure tight oil reservoir. The method comprises the steps of setting a horizontal well bank according to the geological pressure distribution condition of an area where an oil reservoir to be exploited is located, wherein the horizontal well bank comprises a throughput well and an oil production well, and the throughput well and the oil production well are arranged at intervals; performing volume fracturing reservoir reformation on the huff-and-puff well and the production well; and performing water injection and imbibition oil extraction by using the huff-and-puff well, and displacing the adjacent oil production wells of the huff-and-puff well by using an interwell displacement effect to perform displacement oil extraction. By utilizing the embodiments in the application, the advantages of the imbibition oil extraction technology are brought into play, the exploitation of the low-permeability or ultra-low-permeability oil reservoir is accelerated by utilizing the interwell displacement to the maximum extent, and the overall extraction degree and the recovery ratio of the low-pressure tight oil reservoir are improved.

Description

A kind of recovery method and device of low pressure densification oil reservoir

Technical field

The application belongs to oil-gas mining technical field more particularly to a kind of recovery method and device of low pressure densification oil reservoir.

Background technique

Low pressure densification oil reservoir resource very abundant, distribution is extensive, and each oil-producing country has been substantially all such oil field.China Ultralow pressure compact oil reservoir heterogeneity is stronger, low with intrinsic fracture development, reservoir pressure coefficient, and horizontal well development is caused to be passed Subtract that fast, cumulative production is low, is difficult to effective exploitation under low oil price.It is capable of effective exploitation low pressure densification oil reservoir it would therefore be highly desirable to find Method.

Horizontal well volume fracturing reservoir reconstruction means can be used, the exploitation of low pressure densification oil reservoir is carried out.In the prior art, Horizontal well volume fracturing reservoir reconstruction carries out the exploitation of petroleum, the implementation of recovery scheme is usually carried out just for individual well, to individual well The only single development approach for considering cyclic water stimulation imbibition or displacement.This method, which will lead to stratum energy and reduce fast, yield, passs The problems such as deceleration is fast, ultimate recovery is low, the scope of application is small.Also, it is directed to the development approach of individual well, does not account for entire oil The long-term exploitation effect of hiding, can not form the whole development scheme suitable for ultra-low penetration compact oil reservoir, cannot improve Oil in Super-low Permeability The whole recovery ratio of saturating compact oil reservoir.Therefore, a kind of recovery method suitable for low pressure densification oil reservoir is needed in the industry, improves low pressure The embodiment of compact oil reservoir recovery ratio.

Summary of the invention

The application is designed to provide the recovery method and device of a kind of low pressure densification oil reservoir, has both played imbibition oil recovery skill The advantage of art, while hypotonic or Oil in Super-low Permeability oil reservoir exploitation utmostly is accelerated using displacement between well, improve low pressure densification The whole recovery ratio of oil reservoir.

On the one hand this application provides a kind of recovery methods of low pressure densification oil reservoir, including：

According to the geology pressure distribution situation of oil reservoir location to be exploited, Horizontal Well is set and is arranged, the Horizontal Well It include handle up well and producing well, handle up well and the producing well interval setting in row；

To well and the producing well progress volume fracturing reservoir reconstruction handled up；

It carries out water filling imbibition using the well of handling up to recover the oil, and adjacent using well of handling up described in displacement effect displacement between well Producing well carries out displacement oil recovery.

Further, in another embodiment of the method, the well of handling up described in carries out water filling imbibition and recovers the oil, Including：

It is filled the water into the well of handling up, when filling the water end of term pressure equal to original formation pressure, stops filling the water, described in closing It handles up well, carries out bored well；

Judge whether the closed time of the bored well reaches preset time, if so, exploiting to the well of handling up；

Whether strata pressure in the corresponding control area of well of handling up described in judgement is less than or equal to preset pressure, if so, stopping It only recovers the oil, the well of handling up is filled the water again, bored well, oil recovery.

Further, in another embodiment of the method, the method also includes：

Judge whether the water flood recovery number is greater than preset times, if so, to well and the producing well handled up It re-starts volume fracturing reservoir reconstruction, and the position of handle up well and the producing well is interchangeable.

The time of the water flood recovery of well of handling up in the Horizontal Well row is different.

On the other hand, this application provides a kind of quarrying apparatus of low pressure densification oil reservoir, including：

Well arranges setup module, and for the geology pressure distribution situation according to oil reservoir location to be exploited, horizontal well is arranged Well is arranged, and includes handle up well and producing well, handle up well and the producing well interval setting in the Horizontal Well row；

Module is transformed in volume, for well and the producing well progress volume fracturing reservoir reconstruction handled up；

Production module carries out water filling imbibition for well of handling up described in and recovers the oil, and acts on displacement institute using displacement between well It states the adjacent producing well of well of handling up and carries out displacement oil recovery.

Further, in another embodiment of described device, the production module includes：

Bored well unit is filled the water, for being filled the water into the well of handling up, when filling the water end of term pressure equal to original formation pressure, Stop water filling, closes well of handling up, carry out bored well；

Oil-producing unit, for judging whether the closed time of the bored well reaches preset time, if so, handling up described Well is exploited；

Loop control unit, for judging that strata pressure is less than or equal to default pressure in the corresponding control area of well of handling up When power, then stop recovering the oil, the well of handling up be filled the water again, bored well, oil recovery.

Further, in another embodiment of described device, the quarrying apparatus of the low pressure densification oil reservoir further includes：

Well arranges reset cell, for judging whether the water flood recovery number is greater than preset times, if so, gulping down to described Tu Jing and the producing well re-start volume fracturing reservoir reconstruction, and the position of handle up well and the producing well is carried out It exchanges.

Further, in another embodiment of described device, the production module is specifically used for：

The time that the water flood recovery of the well of handling up in the Horizontal Well row is arranged is different.In another aspect, the application also mentions A kind of computer storage medium has been supplied, computer program is stored thereon with, the computer program is performed, and is realized above-mentioned low Press the recovery method of compact oil reservoir.

In another aspect, present invention also provides a kind of quarrying apparatus of low pressure densification oil reservoir, including：It processor and is used for The memory of storage processor executable instruction, the processor realize opening for above-mentioned low pressure densification oil reservoir when executing described instruction Mining method.

The recovery method and device of low pressure densification oil reservoir provided by the present application, by the way that Horizontal Well row is suitably arranged, and By Horizontal Well arrange in horizontal well be set to handle up well and producing well.Each handle up in Horizontal Well row and is adopted well It after oil well carries out volume fracturing reservoir reconstruction, fills the water into well of handling up, is acted on using imbibition, adopted so that well of handling up carries out imbibition Oil.Simultaneously because the interval setting of handle up well and producing well, handle up well water flood recovery when, pressure wave divergence can be relied on, to phase Adjacent producing well plays the role of displacement, pushes difficult recover the oil between well to adjacent producing well, displacement producing well recovers the oil.Both it sent out The advantage of imbibition oil recovery technique has been waved, while utmostly having accelerated hypotonic or Oil in Super-low Permeability oil reservoir exploitation using displacement between well, It avoids to rely only on imbibition effect or rely only on displacement effect and is difficult to the fine and close oil of Efficient Development ultra-low penetration, is difficult to improve and finally adopts The problem of yield, has ensured oil field stable high yield.Meanwhile handle up well and oil recovery are set for entire low pressure densification oil reservoir interval Well realizes the variation of inter-well pressure wave, improves sweep efficiency, while carrying out displacement between well, finally when handling up well water filling Both the oil of imbibition effect extraction near wellbore zone had been utilized, the oil between well has been produced further through displacement, has improved low pressure densification oil reservoir Whole recovery percent of reserves and recovery ratio.

Detailed description of the invention

In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this The some embodiments recorded in application, for those of ordinary skill in the art, in the premise of not making the creative labor property Under, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is a kind of method flow signal of recovery method one embodiment of low pressure densification oil reservoir provided by the present application Figure；

Fig. 2 is the position setting schematic diagram that volume fracturing Horizontal Well is arranged in the embodiment of the present application；

Fig. 3 is typical water horizontal well well group imbibition in the embodiment of the present application+displacement cyclic water stimulation oil recovery schematic diagram；

Fig. 4 is the Production development curve synoptic diagram of well and producing well handled up in the embodiment of the present application；

Fig. 5 is the exploitation effect schematic diagram of the application one embodiment mesolow compact oil reservoir；

Fig. 6 is the development effectiveness contrast schematic diagram of different development plans in the application one implementation；

Fig. 7 is the modular structure schematic diagram of quarrying apparatus one embodiment of low pressure densification oil reservoir provided by the present application；

Fig. 8 is the structural schematic diagram of production module in the application one embodiment；

Fig. 9 is the modular structure schematic diagram of another embodiment of the quarrying apparatus of low pressure densification oil reservoir provided by the present application；

Figure 10 is the modular structure schematic diagram of the quarrying apparatus embodiment of another low pressure densification oil reservoir provided by the present application.

Specific embodiment

In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality The attached drawing in example is applied, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described implementation Example is merely a part but not all of the embodiments of the present application.Based on the embodiment in the application, this field is common The application protection all should belong in technical staff's every other embodiment obtained without creative efforts Range.

Compact oil reservoir reservoir has low hole, hypotonic, low pressure feature, and develops with natural microcrack, development difficulty is big, Energy supplement is difficult, development degree is low etc., and exploitation difficulty is bigger.When exploiting low pressure densification oil reservoir, can be adopted using handling up Oil tech.Huff and puff oil recovery technology is a kind of production method not only injected but also recovered the oil with oil reservoir in same well, and there are two types of important for tool Oil recovery mechanism, first is that the stratum energy around producing well is promoted, second is that the displacement of reservoir oil characteristic using injectant reduces reservoir micro hole Crude oil saturation degree in gap.Technology of handling up is applied to tentative extensively at present as a kind of effective raising recovery ratio method Exploitation.The type of skill of handling up is varied, including CO₂It handles up, microorganism huff and puff, steam soak and cyclic water stimulation etc., the application It can be recovered the oil using cyclic water stimulation in embodiment.By injecting water into reservoir, the oil in reservoir is cemented out.

Cyclic water stimulation oil recovery may include that imbibition oil recovery and displacement are recovered the oil, and cyclic water stimulation imbibition oil recovery technique is for hypotonic A kind of wetting phase fluid that saturating reservoir proposes is in porous media by another non-wetted phase fluid of capillary force effect displacement Oil recovery technique.Compared to traditional water drive, its advantage lies in being able to generate biggish capillary pressure using tiny pore throat two-phase fluid Power, and the power of water drive oil is become, displace the matrix oil that traditional water drive is difficult to produce.In addition, for crack water logging water Horizontal well, being handled up using imbibition makes its oil-producing again using oil and water displacement, stratum energy supplement principle.But it is simple by infiltration Suction effect, recovering the oil, time-consuming, and the cost recovery period is long, and sphere of action is limited；It is acted on by displacement merely, large fracture can only be produced Or the oil in middle and high infiltration water stream channel, the oil in matrix can not be produced.

In the prior art, the research of oily whole development fine and close for ultra-low penetration is less, is generally only to study opening for individual well Originating party case, the consideration imbibition or displacement effect that the exploitation of individual well usually only can be simple.When in the prior art, needed for imbibition oil recovery Between it is long, the development cycle of oil gas is long.The ultra dense well spacing and horizontal well taken to realize displacement effect maximization The oil production methods such as control are adopted in parity segment section construction, note, and construction is complicated, difficulty is big, and development cost is high, mining site bad adaptability.Shen Please embodiment arranged by rationally setting Horizontal Well, and control the water injection time etc. of well handled up, while imbibition and displacement is utilized Effect is recovered the oil, comprehensively consider it is common play imbibition and displacement effect, the development plan whole to the fine and close oil of ultra-low penetration into Row research, to obtain the exploitation for being suitble to the fine and close oil of ultra-low penetration whole, embodiment is simple, and development cost is lower, applicability ratio It is relatively wide, meanwhile, improve the recovery ratio of ultra-low penetration compact oil reservoir entirety.

Fig. 1 is a kind of method flow signal of recovery method one embodiment of low pressure densification oil reservoir provided by the present application Figure, the recovery method of low pressure densification oil reservoir provided by the present application include：

S1, the geology pressure distribution situation according to oil reservoir location to be exploited, setting Horizontal Well are arranged, the horizontal well It include handle up well and producing well, handle up well and the producing well interval setting in well row.

Specifically, usually when carrying out the exploitation of petroleum, multiple wells can be set in oil reservoir location to be exploited, carries out stone The exploitation of oil.Oil reservoir to be analyzed in some embodiments of the application can be single layer oil reservoir or stratified reservoir, and the type of oil reservoir can To include the unsaturated low pressure reservoirs of no edge-bottom water/pneumatic jack, determined with specific reference to actual needs.Such as：One example of the application In oil reservoir to be analyzed can be the ultra-low penetration compact oil reservoir of intrinsic fracture development, reservoir matrix mean permeability can be lower than 0.3mD, average pore can be 9%-11%.It, can be in oil reservoir location to be analyzed by more mouthfuls in the embodiment of the present application Well arrangement is in a row, and each well can be horizontal well.According to oil reservoir to be exploited, that is, low pressure densification oil reservoir location geology The position of horizontal well is arranged in pressure distribution situation, and multiple horizontal wells are arranged in rows, and the well spacing between each horizontal well can root According to needing to be configured, Horizontal Well row is obtained.Such as：In one example of the application, the well spacing of Horizontal Well row be can be set For 500-600m, array pitch can be set to 200m, and horizontal well length can be set to 600-800 meters.Wherein, in Horizontal Well row It may include handle up well and producing well, it can selected part horizontal well is as well of handling up, part of horizontal in Horizontal Well row Well as producing well, Horizontal Well can be arranged in the embodiment of the present application in handle up well and the setting of producing well interval.

Fig. 2 is the position setting schematic diagram that volume fracturing Horizontal Well is arranged in the embodiment of the present application, as shown in Fig. 2, this Shen In please implementing Horizontal Well row in may include multiple rows of horizontal well, may include handle up well and producing well in each draining horizontal well. Same row handle up well and producing well interval setting, and adjacent well row well of handling up be staggered, adjacent well row producing well It is to be staggered.It should be noted that is recovered the oil in Fig. 2 is that well a bite producing well of handling up is arranged alternately flatly, when practical application, It can according to need the quantity at selection interval.Such as：The two mouthfuls of producing wells of well that can handle up flatly are arranged alternately or two mouthfuls of producing wells Well of handling up flatly is arranged alternately, and the embodiment of the present application is not especially limited.It should be noted that Horizontal Well row is as needed It can be a draining horizontal well.

In addition, can be arranged along the biggest principal stress direction of oil reservoir location to be exploited when Horizontal Well row is arranged Horizontal Well row.Biggest principal stress direction can be the maximum direction of geologic body each point stress of oil reservoir location to be exploited, It can be obtained by geological analysis or according to data such as seismic datas.General fracture azimuth and region biggest principal stress direction Unanimously, well row is oriented parallel to fracture azimuth when well spacing, can be convenient volume fracturing, obtains better fracture network.

S2, volume fracturing reservoir reconstruction is carried out to well and the producing well handled up.

Specifically, volume fracturing reservoir reconstruction may include being transformed using volume fracturing technology to reservoir, so that well Reservoir near cylinder has better fracture network.After arranging Horizontal Well row, it is to the horizontal well in Horizontal Well row Handle up well and producing well carries out volume fracturing reservoir reconstruction, in some embodiments of the application, can use slippery water pressure break, multistage Pressure break, synchronous pressure break equipressure split technology and split reservoir reconstruction to horizontal well progress volume fracturing.Such as：The application one embodiment In, reservoir reconstruction can be carried out to horizontal well using more cluster volume fracturing modes are segmented, horizontal well can be divided into mono- section of 100m, Each section can divide 2-4 local perforation, each perforated interval 1-1.5m, midfeather 20-30m, and such perforating modes are known as Cluster, then volume fracturing reservoir reconstruction is carried out by these perforated intervals.In some examples of the application, when volume fracturing reservoir reconstruction Can be using slippery water or guanidine gum fracturing fluid as fracturing fluid, number of segment, which is transformed, can be set to 8-12, and sand feeding amount can be set to 300m³-600m³, entering ground liquid measure can be 3000m³-6000m³, it can be 30%-50% that the row of returning, which leads,.Volume fracturing reservoir reconstruction Relative to conventional fracturing reform, injection fracturing fluid liquid measure is increased, and can be produced using slippery water fracturing fluid more complicated Stitch net.By volume fracturing reservoir reconstruction, be capable of increasing near wellbore permeability, the oil in matrix can first seepage flow to nearly well In band pressure-break, then by pressure-break inflow well, be finally plucked out of, such seepage flow mode make the efficiency of oil exploitation with And the yield of exploitation is far superior to petroleum in such a way that matrix flows into pit shaft.

S3, water filling imbibition oil recovery is carried out using the well of handling up, and utilize well phase of handling up described in displacement effect displacement between well Adjacent producing well carries out displacement oil recovery.

Specifically, set Horizontal Well row and well of handling up, producing well position, by each well of handling up, producing well into After row volume fracturing reservoir reconstruction, to handling up, well carries out water flood recovery.Water flood recovery can specifically include water filling, bored well, oil recovery Three phases.When well of handling up carries out water flood recovery, well of handling up can use grease replacement process and pressure wave inside reservoir and expand The process of dissipating makes difficult recover the oil in matrix enter hypertonic channel, realizes huff and puff oil recovery by imbibition metathesis.Simultaneously as handling up Well and the setting of producing well interval, handle up well when carrying out water flood recovery, can rely on pressure wave divergence, rise to adjacent producing well It is acted on to displacement, pushes difficult recover the oil between well to adjacent producing well, displacement producing well recovers the oil.

In the recovery process of low pressure densification oil reservoir, when well of handling up carries out water flood recovery, that is, well of handling up fill the water-and it is bored It when well-oil recovery, the offset well of the well of handling up while driving a well, utilizes the displacement between well to act on and recover the oil.It should be noted that actually answering Used time, if during well water filling of handling up, the producing well adjacent with the well of handling up it is aqueous more than 80%, can also be with when water logging occurs The adjacent producing well closing well bored well regular hour is recovered the oil again.Such as：Well A adjacent producing well of handling up is B, C, when handling up When carrying out water flood recovery, adjacent producing well B, C's well A can recover the oil always.If B, C's is aqueous more than 80%, water occurs When flooding, B, C closing well bored well regular hour can also be recovered the oil again.

Using method provided by the embodiments of the present application, that is, the principle of imbibition displacement is utilized while displacement between well is utilized Principle, displacement go out oil can be produced by producing well, the oil that the bored well of imbibition cements out can voluntarily be produced by well of handling up, " drive seep In conjunction with " recover the oil, development rate and Exploitation Depth are had both, the recovery ratio and efficiency of oil-gas mining are improved.The embodiment of the present application utilizes Compact oil reservoir pore throat itself is tiny, this big feature of capillary force, and the imbibition oil recovery effect for the well near wellbore zone that handle up solves Compact oil reservoir pore throat itself is tiny, the normal exploitation of the big obstruction of capillary force, the problem of development contradiction occurs.In addition, the application one In a embodiment, the well of handling up described in carries out water filling imbibition and recovers the oil, and may include：Handling up in the Horizontal Well row The time of the water flood recovery of well is different.

Specifically, when the practical exploitation for carrying out low pressure densification oil reservoir, more mouthfuls of handle up well and more mouthfuls of producing wells be may include, respectively The time that a well of handling up carries out huff and puff oil recovery can be inconsistent.Each well of handling up can be set according to the needs actually exploited Water filling, bored well and oil recovery corresponding time.Such as：It, can if being provided with 3 mouthfuls of wells of handling up in low pressure densification oil reservoir to be exploited To set moment a for the handle up water injection time of well of first, the water injection time of second mouthful of well of handling up is set as moment b, third The handle up water injection time of well of mouth is set as moment c.It is of course also possible to carry out while filling the water each well of handling up, the application is implemented Example is not especially limited.

The recovery method of low pressure densification oil reservoir provided by the present application, by the way that Horizontal Well row is suitably arranged, and will be horizontal Horizontal well in Jing Jing row is set to handle up well and producing well.To each in Horizontal Well row handle up well and producing well into It after row volume fracturing reservoir reconstruction, fills the water into well of handling up, is acted on using imbibition, so that well of handling up carries out imbibition oil recovery.Simultaneously Due to handle up well and producing well interval be arranged, handle up well water flood recovery when, can rely on pressure wave divergence, to adjacent oil recovery Well plays the role of displacement, pushes difficult recover the oil between well to adjacent producing well, displacement producing well recovers the oil.Both imbibition has been played The advantage of oil recovery technique, while hypotonic or Oil in Super-low Permeability oil reservoir exploitation utmostly is accelerated using displacement between well, it avoids only Displacement effect is acted on or relies only on by imbibition to be difficult to the fine and close oil of Efficient Development ultra-low penetration, be difficult to improve asking for ultimate recovery Topic, has ensured oil field stable high yield.Meanwhile handle up well and producing well are set for entire low pressure densification oil reservoir interval, it is handling up When well fills the water, the variation of inter-well pressure wave is realized, sweep efficiency is improved, while carrying out displacement between well, is finally both utilized The oil of imbibition effect extraction near wellbore zone, the oil between well has been produced further through displacement, the entirety for improving low pressure densification oil reservoir is adopted Degree and recovery ratio out.

On the basis of the above embodiments, the application also provides another embodiment of the method.Specifically, the side In another embodiment of method, the well of handling up described in carries out water filling imbibition and recovers the oil, and may include：

Specifically, when carrying out water flood recovery using well of handling up, sand-flushing first can be carried out to well of handling up, it later can be with It is filled the water with pre-set daily water-injection rate into well of handling up, well near wellbore zone strata pressure of improving the standard, while adjacent is adopted Oil well carries out displacement, stops water filling when filling the water end of term pressure and being equal to original formation pressure, cumulative water injected at this time is about etc. In the cumulative liquid production of failure mining phase.After water filling, will handle up well closing well, into the bored well stage, at this moment, start reservoir Internal grease replacement process and pressure wave-diffusion process make difficult recover the oil in matrix enter hypertonic channel by imbibition metathesis, Pressure wave divergence can be relied on simultaneously, plays the role of displacement to offset well, and difficulty between well is made to recover the oil to offset well push.If judging bored well Closed time reaches preset time, then can drive a well to well of handling up, be exploited with pre-set daily fluid production rate.When gulping down When spitting the strata pressure in the corresponding control area of well and dropping to preset pressure, to handling up, well carries out closing well, stops this round and gulps down It spits, into the second wheel water filling, bored well, oil recovery process.Individual well fracture half-length × horizontal well length=area, the corresponding control of well of handling up Strata pressure in area processed can refer to that, in this control range inner plane strata pressure, strata pressure can pass through pressure recovery Well testing measures.

Wherein, pre-set daily water-injection rate can be obtained based on numerical simulation study and field test analysis, accumulation note Water is approximately equal to the cumulative liquid production of failure mining phase, and accumulation water filling can be obtained according to material balance method reasoning and calculation Amount.Daily water-injection rate × injection number of days can be equal to each cumulative water injected, and how much specific cumulative water injected can mention according to pressure High 40% liquid measure needed calculates.According to the difference of near wellbore zone pressure to reset pressure, can be calculated according to material balance method The cumulative water injected needed, cumulative water injected/design daily water-injection rate=injection number of days.Pre-set daily fluid production rate can also be with base It is obtained in numerical simulation study and field test analysis, is usually no more than 15m³/ d prevents strata pressure decline too fast.Default pressure Power can be the 60% of original formation pressure, and original formation pressure can be by obtaining in the data such as adress analysis or seismic data , the strata pressure in the corresponding control area of well of handling up can be actually measured.The pre- of bored well can be set according to water injection time If the time, preset time can generally be equal to water injection time, and water injection time can be by obtaining the injecting process timing.Namely Say that usual closed time can be equal to water injection time and can drive a well to well of handling up when closed time reaches water injection time It recovers the oil.

The recovery method of low pressure densification oil reservoir provided by the present application, by the way that Horizontal Well row is suitably arranged, and will be horizontal Horizontal well in Jing Jing row is set to handle up well and producing well.By the water filling recycled to well of handling up, bored well is adopted Oil is acted on using imbibition, so that well of handling up recovers the oil, simultaneously because the interval setting of handle up well and producing well, well of handling up note When hydromining oil, pressure wave divergence can be relied on, plays the role of displacement to adjacent producing well, adopt difficult recover the oil between well to adjacent Oil well push, displacement producing well recover the oil.Both the advantage of imbibition oil recovery technique had been played, while utmostly having been driven using between well For hypotonic or Oil in Super-low Permeability oil reservoir exploitation is accelerated, avoid rely only on imbibition effect or rely only on displacement effect be difficult to efficiently open The fine and close oil of hair ultra-low penetration is difficult to improve the problem of ultimate recovery, has ensured oil field stable high yield.

On the basis of the above embodiments, the application also provides another embodiment of the method.Specifically, the side In another embodiment of method, the method also includes：

Specifically, when carrying out water flood recovery to well of handling up, water filling-bored well-oil recovery can be used as primary complete water filling It recovers the oil.When water flood recovery number is greater than preset times, well and producing well can be handled up again in Horizontal Well row again Volume fracturing reservoir reconstruction is carried out, the method for volume fracturing reservoir reconstruction can refer to above-described embodiment, and details are not described herein again.Weight After newly discharging into row volume fracturing reservoir reconstruction to Horizontal Well, it will handle up well and producing well be interchangeable, it can will be original Well of handling up as producing well, carry out water flood recovery for original producing well as well of handling up.It can reach in this way to avoid individual well The lower economic limit of exploitation, so that cost of oil production is excessively high.Lower economic limit can refer to needed for doing primary water filling-bored well-oil recovery Water filling takes, the expenses such as operating cost, equal with the expense that oil increment after bored well is sold.Changed by volume fracturing reservoir again It makes, and replaces the position of water injection well and producing well, so that each horizontal well can be carried out imbibition and displacement is recovered the oil, improve low Press the recovery ratio of compact oil reservoir entirety.The size of preset times by numerical simulation or can test determination according to actual needs, The application is not especially limited.

Such as：If including 6 horizontal wells in Horizontal Well row, wherein horizontal well A, B, C is well of handling up, and E, F, G are to recover the oil The position of well, handle up well and producing well can be configured according to above-described embodiment.When the number for well A, B, C water flood recovery of handling up When greater than 5 times, can will handle up well A, B, C, producing well E, F, G, re-start volume fracturing reservoir reconstruction, also, by A, B, C As producing well, using E, F, G as well of handling up.Water flood recovery is carried out to E, F, G, and is acted on using displacement between well, displacement A, B, C It recovers the oil.When the number of E, F, G water flood recovery is greater than 5 times, A, B, C, E, F, G are re-started into volume fracturing reservoir again and changed It makes, and using A, B, C as well of handling up, E, F, G are as producing well.Volume fracturing reservoir reconstruction is successively carried out in this way, and is gulped down The exchange of Tu Jing, producing well.

The embodiment that the application is introduced below with reference to specific example：

Changqing oilfields are newly appeased the border area 83 horizontal well nature failure formula development zones, and this area is Changqing oilfields densification oil test area One of, fine and close oil reservoir is 7 layers, reservoir buried depth 2190-2570m long, reservoir average pore 7-9%, mean permeability 0.1- 0.2mD, original formation pressure 15.8MPa, the development of reservoir intrinsic fracture, average crack develop 0.29/m of density, in-place oil Viscosity 1.23mPas, density 0.74g/cm3, gas-oil ratio 75.40m3/t, saturation pressure 7.04MPa.Fig. 3 is the application reality Typical water horizontal well well group imbibition in example+displacement cyclic water stimulation oil recovery schematic diagram is applied, as shown in figure 3, AP83 conduct is handled up in Fig. 3 Well, adjacent two sides are respectively arranged with producing well AP48 and AP84.

It is arranged along biggest principal stress direction arrangement Horizontal Well, well spacing 500m, array pitch 200m, 600 meters of horizontal well length.For Horizontal Well row is arranged well of handling up every well, adjacent level Jing Jing is arranged, and well of handling up is interlaced.Using the more cluster volumes of segmentation Pressure break mode carries out reservoir reconstruction to horizontal well, and fracturing fluid uses slippery water fracturing fluid, and number of segment 12, sand feeding amount 600m is transformed³, enter Ground liquid measure 6000m³, the row of returning leads 40%, average single hop operational discharge capacity 5m³/ min, average single hop sand feeding amount 50m³。

Handle up well AP83 imbibition oil recovery technique the specific steps are：

1) when reservoir pressure is down to 9.5MPa, sand-flushing is carried out to the well AP83 that handles up first, later with 120m³/ d note Water is filled the water to reservoir, well near wellbore zone strata pressure of improving the standard, while being driven to adjacent producing well AP48 and AP84 It replaces, reaches 5100m when filling the water the 43rd day cumulative water injected³When stop water filling, cumulative water injected at this time is approximately equal to failure and opens Adopt the cumulative liquid production in stage.

2) after filling the water, well AP83 closing well of handling up, bored well 45 days starts grease replacement process and pressure wave inside reservoir Diffusion process.It is that difficult recover the oil enters hypertonic channel in matrix by imbibition metathesis；By pressure wave divergence, to adjacent Producing well AP48 and AP84 play the role of displacement, and difficulty between well is made to recover the oil to offset well push.

3) the opening well and making production stage, with 12m³/ d daily fluid production rate is exploited, the stratum in well AP83 control area of handling up Closing well stops this round and handles up when pressure drops to 9.5MPa, into the second wheel water filling, bored well, oil recovery process.

During the well AP83 that handles up is filled the water, adjacent producing well AP48 and AP84 close a well in.It handles up and the bored well of well AP83 and adopts During oil, adjacent producing well AP48 is always maintained to be exploited with 6m3/d daily fluid production rate, and adjacent producing well AP84 is protected always It holds and is exploited with 10m3/d daily fluid production rate.Fig. 4 is that handle up in the embodiment of the present application Production development curve of well and producing well shows It is intended to, it can be seen that in the well AP83 water flood recovery stage of handling up, handle up well AP83 and adjacent producing well AP48 and AP84 pairs The variation of daily fluid production rate, daily oil production and the water content answered.

Measure terminates initial stage, and AP83 days oil-producings of well of handling up rise to 5.17t from 0.83t, and handle up accumulative increasing oil 644.21t.Phase Adjacent AP48 days oil-producings of producing well rise to 4.22t from 2.67t, and matrix water drive is accumulative to increase oil 428.51t.Adjacent producing well AP84 Day oil-producing rises to 9.1t from 2.33t, and matrix water drive is accumulative to increase oil 1157.84t.Measure effect is obvious, it can be seen that imbibition+displacement Development mode can reasonable supplement stratum energy, the difficulty between well that can utmostly tap the latent power on well adopts fine and close oily potentiality, improves Ultimate recovery.

Fig. 5 is the exploitation effect schematic diagram of the application one embodiment mesolow compact oil reservoir, as shown in figure 5, right in figure The scale PRES at upper angle can indicate different oil saturations, and the horizontal well W2 of centre can indicate well of handling up in figure, Horizontal well W1, W3 of the right and left can indicate producing well.As can be seen from the figure there are different journeys in oil saturation field between well The variation of degree, the water energy infused in the well that illustrates to handle up are driven to all areas between well, allow the crude oil between well to flow to pit shaft extraction and come, so that Crude oil between well is adequately employed, and the whole recovery ratio of low pressure densification oil reservoir is improved.

In addition, the application one recovery scheme also proposed to the embodiment of the present application in implementing has carried out numerical simulation reality It tests, on the basis of volume fracturing increases reservoir reconstruction volume, implements the mode (handling up every well spacing) of " drive to seep and combine " to well group It is developed.Fig. 6 be the application one implement in different development plans development effectiveness contrast schematic diagram, as shown in fig. 6, can be with Find out that the recovery percent of reserves change rate of " imbibition+displacement " recovery method in the embodiment of the present application is apparently higher than original displacement in flooding The superiority for combining mining method is seeped in curvilinear motion rate, that is, the drive for illustrating that the embodiment of the present application proposes.

On this basis, influence of the removal volume fracturing to recovery percent of reserves, to imbibition effect and displacement effect to total output Contribution done quantization comparison, as shown in table 1, it can be seen that after changing waterflooding extraction mode, be still the contribution rate of displacement In the highest flight, however as the increase for round of handling up and the growth of development time, imbibition effect improves the contribution of recovery percent of reserves Rate is gradually increased.

As it can be seen that the measure of this transformation waterflooding extraction mode has utmostly played displacement effect and imbibition effect, solve The development contradiction that compact oil reservoir waterflooding extraction easy water breakthrough, injection-production relation difficulty are established, while it is independent to substantially reduce compact oil reservoir The time recovered the oil by imbibition effect.

The different withdrawal mechanism recovery percent of reserves contrast tables of table 1

Recovery method provided by the embodiments of the present application is bred in the valuable practical experience of the fine and close oil exploitation of Changqing oilfields And go out, there is extremely strong mining site adaptability, can be applied directly among mining site development plan.

The recovery method of low pressure densification oil reservoir provided by the present application, by the way that Horizontal Well row is suitably arranged, and will be horizontal Horizontal well in Jing Jing row is set to handle up well and producing well.To each in Horizontal Well row handle up well and producing well into After row volume fracturing reservoir reconstruction, fills the water into well of handling up, acted on using imbibition, so that well of handling up recovers the oil, simultaneously because Handle up the interval setting of well and producing well, handle up well water flood recovery when, pressure wave divergence can be relied on, adjacent producing well is risen It is acted on to displacement, pushes difficult recover the oil between well to adjacent producing well, displacement producing well recovers the oil.Both imbibition oil recovery had been played The advantage of technology, while hypotonic or Oil in Super-low Permeability oil reservoir exploitation utmostly is accelerated using displacement between well, it avoids and relies only on Imbibition acts on or relies only on displacement effect and is difficult to the fine and close oil of Efficient Development ultra-low penetration, is difficult to improve the problem of ultimate recovery, Oil field stable high yield is ensured.Meanwhile handle up well and producing well are set for entire low pressure densification oil reservoir interval, in well note of handling up When water, the variation of inter-well pressure wave is realized, sweep efficiency is improved, while carrying out displacement between well, imbibition is finally both utilized The oil of effect extraction near wellbore zone, the oil between well has been produced further through displacement, improves the whole extraction journey of low pressure densification oil reservoir Degree and recovery ratio.It solves to rely only on imbibition effect or rely only on displacement effect and is difficult to the fine and close oil of Efficient Development ultra-low penetration, hardly possible The problem of to improve ultimate recovery, provides and opens the entirety for the fine and close oil of ultra-low penetration that imbibition plays jointly with displacement effect Forwarding method.

Based on the recovery method of low pressure densification oil reservoir described above, this specification one or more embodiment also provides one The quarrying apparatus of kind low pressure densification oil reservoir.The device may include the system for having used this specification embodiment the method (including distributed system), software (application), module, component, server, client etc. simultaneously combine the necessary dress for implementing hardware It sets.Based on same innovation thinking, for example following implementation of the device in one or more embodiments that this specification embodiment provides Described in example.Since the implementation that device solves the problems, such as is similar to method, the reality of the specific device of this specification embodiment The implementation that may refer to preceding method is applied, overlaps will not be repeated.Used below, term " unit " or " module " can To realize the combination of the software and/or hardware of predetermined function.Although device described in following embodiment is preferably come with software It realizes, but the realization of the combination of hardware or software and hardware is also that may and be contemplated.

Specifically, Fig. 7 is that the modular structure of quarrying apparatus one embodiment of low pressure densification oil reservoir provided by the present application is shown It is intended to, as shown in fig. 7, the quarrying apparatus of low pressure densification oil reservoir provided herein includes well row's setup module 61, volume changes Modeling block 72, production module 73.

Well arranges setup module 71, can be used for the geology pressure distribution situation according to oil reservoir location to be exploited, setting Horizontal Well is arranged, and includes handle up well and producing well, handle up well and the producing well interval setting in the Horizontal Well row；

Module 72 is transformed in volume, can be used for well and the producing well progress volume fracturing reservoir reconstruction handled up；

Production module 73, the well that can be used for handling up described in carries out water filling imbibition and recovers the oil, and is acted on using displacement between well The adjacent producing well of well of handling up described in displacement carries out displacement oil recovery.

The quarrying apparatus of low pressure densification oil reservoir provided by the present application, by the way that Horizontal Well row is suitably arranged, and will be horizontal Horizontal well in Jing Jing row is set to handle up well and producing well.To each in Horizontal Well row handle up well and producing well into After row volume fracturing reservoir reconstruction, fills the water into well of handling up, acted on using imbibition, so that well of handling up recovers the oil, simultaneously because Handle up the interval setting of well and producing well, handle up well water flood recovery when, pressure wave divergence can be relied on, adjacent producing well is risen It is acted on to displacement, pushes difficult recover the oil between well to adjacent producing well, displacement producing well recovers the oil.Both imbibition oil recovery had been played The advantage of technology, while hypotonic or Oil in Super-low Permeability oil reservoir exploitation utmostly is accelerated using displacement between well, it avoids and relies only on Imbibition acts on or relies only on displacement effect and is difficult to the fine and close oil of Efficient Development ultra-low penetration, is difficult to improve the problem of ultimate recovery, Oil field stable high yield is ensured.Meanwhile handle up well and producing well are set for entire low pressure densification oil reservoir interval, in well note of handling up When water, the variation of inter-well pressure wave is realized, sweep efficiency is improved, while carrying out displacement between well, imbibition is finally both utilized The oil of effect extraction near wellbore zone, the oil between well has been produced further through displacement, improves the whole extraction journey of low pressure densification oil reservoir Degree and recovery ratio.

Fig. 8 is the structural schematic diagram of production module in the application one embodiment, as shown in figure 8, in above-described embodiment On the basis of, the production module 73 includes：

Bored well unit 81 is filled the water, can be used for into the well of handling up filling the water, when water filling end of term pressure is equal to prime stratum When pressure, stop water filling, closes well of handling up, carry out bored well；

Oil-producing unit 82, can be used for judging whether the closed time of the bored well reaches preset time, if so, to institute Well of handling up is stated to be exploited；

Loop control unit 83 can be used for judging that strata pressure is less than or equal in the corresponding control area of well of handling up When preset pressure, then stop recovering the oil, the well of handling up be filled the water again, bored well, oil recovery.

The quarrying apparatus of low pressure densification oil reservoir provided by the present application, by the way that Horizontal Well row is suitably arranged, and will be horizontal Horizontal well in Jing Jing row is set to handle up well and producing well.By the water filling recycled to well of handling up, bored well is adopted Oil is acted on using imbibition, so that well of handling up recovers the oil, simultaneously because the interval setting of handle up well and producing well, well of handling up note When hydromining oil, pressure wave divergence can be relied on, plays the role of displacement to adjacent producing well, adopt difficult recover the oil between well to adjacent Oil well push, displacement producing well recover the oil.Both the advantage of imbibition oil recovery technique had been played, while utmostly having been driven using between well For hypotonic or Oil in Super-low Permeability oil reservoir exploitation is accelerated, avoid rely only on imbibition effect or rely only on displacement effect be difficult to efficiently open The fine and close oil of hair ultra-low penetration is difficult to improve the problem of ultimate recovery, has ensured oil field stable high yield.

Fig. 9 is the modular structure schematic diagram of another embodiment of the quarrying apparatus of low pressure densification oil reservoir provided by the present application, As shown in figure 9, on the basis of the above embodiments, the quarrying apparatus of the low pressure densification oil reservoir further includes：

Well arranges reset cell 91, can be used for judging whether the water flood recovery number is greater than preset times, if so, right It is described to handle up well and the producing well re-starts volume fracturing reservoir reconstruction, and by the position of the handle up well and the producing well It sets and is interchangeable.

The quarrying apparatus of low pressure densification oil reservoir provided by the present application, under the economy that exploitation can be reached to avoid individual well in this way Limit, cost are excessively high.By volume fracturing reservoir reconstruction again, and the position of water injection well and producing well is replaced, so that each Horizontal well can be carried out imbibition and displacement is recovered the oil, and improve the recovery ratio of low pressure densification oil reservoir entirety.

On the basis of the above embodiments, the production module is specifically used for：

The time that the water flood recovery of the well of handling up in the Horizontal Well row is arranged is different.

The quarrying apparatus of low pressure densification oil reservoir provided by the present application, when well of handling up carries out water flood recovery, adjacent oil recovery Well drives a well carry out displacement oil recovery simultaneously.It is stewing the different note of each well of handling up can be set with development behavior according to each well geological condition It adopts the time, has both played the advantage of imbibition oil recovery technique, while utmostly accelerating hypotonic or Oil in Super-low Permeability using displacement between well The exploitation of oil reservoir, avoids to rely only on imbibition effect or rely only on displacement effect and is difficult to the fine and close oil of Efficient Development ultra-low penetration, difficult The problem of to improve ultimate recovery, has ensured oil field stable high yield.

It should be noted that device described above can also include other embodiment party according to the description of embodiment of the method Formula, concrete implementation mode are referred to the description of related method embodiment, do not repeat one by one herein.

It is above-mentioned that this specification specific embodiment is described.Other embodiments are in the scope of the appended claims It is interior.In some cases, the movement recorded in detail in the claims or step can be come according to the sequence being different from embodiment It executes and desired result still may be implemented.In addition, process depicted in the drawing not necessarily require show it is specific suitable Sequence or consecutive order are just able to achieve desired result.In some embodiments, multitasking and parallel processing be also can With or may be advantageous.

The embodiment of the present application also provides a kind of computer storage mediums, are stored thereon with computer program, the calculating Machine program is performed, and realizes the recovery method of above-mentioned low pressure densification oil reservoir, is such as realized：According to oil reservoir location to be exploited Geology pressure distribution situation, setting Horizontal Well are arranged, and include handle up well and producing well, the well of handling up in the Horizontal Well row It is arranged with the producing well interval；To well and the producing well progress volume fracturing reservoir reconstruction handled up；It is gulped down using described Tu Jing carries out water filling imbibition and recovers the oil, and carries out displacement using the adjacent producing well of well of handling up described in displacement effect displacement between well and adopt Oil.

This specification embodiment provide above-mentioned low pressure densification oil reservoir recovery method or device can in a computer by Processor executes corresponding program instruction to realize, such as using the c++ language of windows operating system in the realization of the end PC, linux System is realized or other are for example realized using android, iOS system programming language in intelligent terminal, and is based on quantum Processing logic realization of computer etc..A kind of another embodiment of the quarrying apparatus for low pressure densification oil reservoir that this specification provides In, Figure 10 is the modular structure schematic diagram of the quarrying apparatus embodiment of another low pressure densification oil reservoir provided by the present application, is such as schemed Shown in 10, the quarrying apparatus for the low pressure densification oil reservoir that another embodiment of the application provides may include processor 101 and be used for The memory 102 of storage processor executable instruction,

Processor 101 and memory 102 pass through bus 103 and complete mutual communication；

The processor 101 is used to call the program instruction in the memory 102, to execute above-mentioned each low pressure densification oil Method provided by the recovery method embodiment of hiding, for example including：It is distributed according to the geology pressure of oil reservoir location to be exploited Situation, setting Horizontal Well are arranged, and include handle up well and producing well, well and the producing well handled up in the Horizontal Well row Interval setting；To well and the producing well progress volume fracturing reservoir reconstruction handled up；It is filled the water using the well of handling up Imbibition is recovered the oil, and carries out displacement oil recovery using the adjacent producing well of well of handling up described in displacement effect displacement between well.

It should be noted that specification device described above can also include it according to the description of related method embodiment His embodiment, concrete implementation mode are referred to the description of embodiment of the method, do not repeat one by one herein.In the application Various embodiments are described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, often What a embodiment stressed is the difference from other embodiments.For hardware+program class embodiment, Since it is substantially similar to the method embodiment, so being described relatively simple, related place is said referring to the part of embodiment of the method It is bright.

This specification embodiment is not limited to meet industry communication standard, standard computer data processing sum number According to situation described in storage rule or this specification one or more embodiment.The right way of conduct is made in certain professional standards or use by oneself In formula or the practice processes of embodiment description embodiment modified slightly also may be implemented above-described embodiment it is identical, it is equivalent or The implementation result being anticipated that after close or deformation.Using these modifications or deformed data acquisition, storage, judgement, processing side The embodiment of the acquisitions such as formula still may belong within the scope of the optional embodiment of this specification embodiment.

In the 1990s, the improvement of a technology can be distinguished clearly be on hardware improvement (for example, Improvement to circuit structures such as diode, transistor, switches) or software on improvement (improvement for method flow).So And with the development of technology, the improvement of current many method flows can be considered as directly improving for hardware circuit. Designer nearly all obtains corresponding hardware circuit by the way that improved method flow to be programmed into hardware circuit.Cause This, it cannot be said that the improvement of a method flow cannot be realized with hardware entities module.For example, programmable logic device (Programmable Logic Device, PLD) (such as field programmable gate array (Field Programmable Gate Array, FPGA)) it is exactly such a integrated circuit, logic function determines device programming by user.By designer Voluntarily programming comes a digital display circuit " integrated " on a piece of PLD, designs and makes without asking chip maker Dedicated IC chip.Moreover, nowadays, substitution manually makes IC chip, this programming is also used instead mostly " is patrolled Volume compiler (logic compiler) " software realizes that software compiler used is similar when it writes with program development, And the source code before compiling also write by handy specific programming language, this is referred to as hardware description language (Hardware Description Language, HDL), and HDL is also not only a kind of, but there are many kind, such as ABEL (Advanced Boolean Expression Language)、AHDL(Altera Hardware Description Language)、Confluence、CUPL(Cornell University Programming Language)、HDCal、JHDL (Java Hardware Description Language)、Lava、Lola、MyHDL、PALASM、RHDL(Ruby Hardware Description Language) etc., VHDL (Very-High-Speed is most generally used at present Integrated Circuit Hardware Description Language) and Verilog.Those skilled in the art also answer This understands, it is only necessary to method flow slightly programming in logic and is programmed into integrated circuit with above-mentioned several hardware description languages, The hardware circuit for realizing the logical method process can be readily available.

Controller can be implemented in any suitable manner, for example, controller can take such as microprocessor or processing The computer for the computer readable program code (such as software or firmware) that device and storage can be executed by (micro-) processor can Read medium, logic gate, switch, specific integrated circuit (Application Specific Integrated Circuit, ASIC), the form of programmable logic controller (PLC) and insertion microcontroller, the example of controller includes but is not limited to following microcontroller Device：ARC 625D, Atmel AT91SAM, Microchip PIC18F26K20 and Silicone Labs C8051F320, are deposited Memory controller is also implemented as a part of the control logic of memory.It is also known in the art that in addition to Pure computer readable program code mode is realized other than controller, can be made completely by the way that method and step is carried out programming in logic Controller is obtained to come in fact in the form of logic gate, switch, specific integrated circuit, programmable logic controller (PLC) and insertion microcontroller etc. Existing identical function.Therefore this controller is considered a kind of hardware component, and to including for realizing various in it The device of function can also be considered as the structure in hardware component.Or even, it can will be regarded for realizing the device of various functions For either the software module of implementation method can be the structure in hardware component again.

System, device, module or the unit that above-described embodiment illustrates can specifically realize by computer chip or entity, Or it is realized by the product with certain function.It is a kind of typically to realize that equipment is computer.Specifically, computer for example may be used Think personal computer, laptop computer, vehicle-mounted human-computer interaction device, cellular phone, camera phone, smart phone, individual Digital assistants, media player, navigation equipment, electronic mail equipment, game console, tablet computer, wearable device or The combination of any equipment in these equipment of person.

Although this specification one or more embodiment provides the method operating procedure as described in embodiment or flow chart, It but may include more or less operating procedure based on conventional or without creativeness means.The step of being enumerated in embodiment Sequence is only one of numerous step execution sequence mode, does not represent and unique executes sequence.Device in practice or When end product executes, can be executed according to embodiment or the execution of method shown in the drawings sequence or parallel (such as it is parallel The environment of processor or multiple threads, even distributed data processing environment).The terms "include", "comprise" or its Any other variant is intended to non-exclusive inclusion so that include the process, methods of a series of elements, product or Equipment not only includes those elements, but also including other elements that are not explicitly listed, or further include for this process, Method, product or the intrinsic element of equipment.In the absence of more restrictions, being not precluded is including the element There is also other identical or equivalent elements in process, method, product or equipment.The first, the second equal words are used to indicate name Claim, and does not indicate any particular order.

For convenience of description, it is divided into various modules when description apparatus above with function to describe respectively.Certainly, implementing this The function of each module can be realized in the same or multiple software and or hardware when specification one or more, it can also be with The module for realizing same function is realized by the combination of multiple submodule or subelement etc..Installation practice described above is only It is only illustrative, for example, in addition the division of the unit, only a kind of logical function partition can have in actual implementation Division mode, such as multiple units or components can be combined or can be integrated into another system or some features can be with Ignore, or does not execute.Another point, shown or discussed mutual coupling, direct-coupling or communication connection can be logical Some interfaces are crossed, the indirect coupling or communication connection of device or unit can be electrical property, mechanical or other forms.

The present invention be referring to according to the method for the embodiment of the present invention, the process of device (system) and computer program product Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates, Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or The function of being specified in multiple boxes.

These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one The step of function of being specified in a box or multiple boxes.

In a typical configuration, calculating equipment includes one or more processors (CPU), input/output interface, net Network interface and memory.

Memory may include the non-volatile memory in computer-readable medium, random access memory (RAM) and/or The forms such as Nonvolatile memory, such as read-only memory (ROM) or flash memory (flash RAM).Memory is computer-readable medium Example.

Computer-readable medium includes permanent and non-permanent, removable and non-removable media can be by any method Or technology come realize information store.Information can be computer readable instructions, data structure, the module of program or other data. The example of the storage medium of computer includes, but are not limited to phase change memory (PRAM), static random access memory (SRAM), moves State random access memory (DRAM), other kinds of random access memory (RAM), read-only memory (ROM), electric erasable Programmable read only memory (EEPROM), flash memory or other memory techniques, read-only disc read only memory (CD-ROM) (CD-ROM), Digital versatile disc (DVD) or other optical storage, magnetic cassettes, tape magnetic disk storage, graphene stores or other Magnetic storage device or any other non-transmission medium, can be used for storage can be accessed by a computing device information.According to herein In define, computer-readable medium does not include temporary computer readable media (transitory media), such as the data of modulation Signal and carrier wave.

It will be understood by those skilled in the art that this specification one or more embodiment can provide as method, system or calculating Machine program product.Therefore, this specification one or more embodiment can be used complete hardware embodiment, complete software embodiment or The form of embodiment combining software and hardware aspects.Moreover, this specification one or more embodiment can be used at one or It is multiple wherein include computer usable program code computer-usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) on the form of computer program product implemented.

This specification one or more embodiment can computer executable instructions it is general on It hereinafter describes, such as program module.Generally, program module includes executing particular task or realization particular abstract data type Routine, programs, objects, component, data structure etc..This this specification one can also be practiced in a distributed computing environment Or multiple embodiments, in these distributed computing environments, by being held by the connected remote processing devices of communication network Row task.In a distributed computing environment, program module can be located at the local and remote computer including storage equipment In storage medium.

All the embodiments in this specification are described in a progressive manner, same and similar portion between each embodiment Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.Especially for system reality For applying example, since it is substantially similar to the method embodiment, so being described relatively simple, related place is referring to embodiment of the method Part explanation.In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", The description of " specific example " or " some examples " etc. means specific features described in conjunction with this embodiment or example, structure, material Or feature is contained at least one embodiment or example of this specification.In the present specification, to the signal of above-mentioned term Property statement be necessarily directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described It may be combined in any suitable manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this The technical staff in field can be by the spy of different embodiments or examples described in this specification and different embodiments or examples Sign is combined.

The foregoing is merely the embodiments of this specification one or more embodiment, are not limited to book explanation Book one or more embodiment.To those skilled in the art, this specification one or more embodiment can have various Change and variation.All any modification, equivalent replacement, improvement and so within the spirit and principles of the present application should all include Within scope of the claims.

Claims

1. a kind of recovery method of low pressure densification oil reservoir, which is characterized in that

According to the geology pressure distribution situation of oil reservoir location to be exploited, Horizontal Well is set and is arranged, in the Horizontal Well row Including well and the producing well handled up, handle up well and the producing well interval setting；

Water filling imbibition is carried out using the well of handling up to recover the oil, and utilizes the adjacent oil recovery of well of handling up described in displacement effect displacement between well Well carries out displacement oil recovery.

2. a kind of recovery method of low pressure densification oil reservoir as described in claim 1, which is characterized in that handle up described in the utilization Well carries out water filling imbibition and recovers the oil, including：

It is filled the water into the well of handling up, when filling the water end of term pressure equal to original formation pressure, stops water filling, handle up described in closing Well carries out bored well；

Whether strata pressure in the corresponding control area of well of handling up described in judgement is less than or equal to preset pressure, if so, stopping adopting Oil again fills the water the well of handling up, bored well, oil recovery.

3. a kind of recovery method of low pressure densification oil reservoir as described in claim 1, which is characterized in that the method also includes：

Judge whether the water flood recovery number is greater than preset times, if so, handling up well and the producing well again to described Volume fracturing reservoir reconstruction is carried out, and the position of handle up well and the producing well is interchangeable.

4. a kind of recovery method of low pressure densification oil reservoir as described in claim 1, which is characterized in that handle up described in the utilization Well carries out water filling imbibition and recovers the oil, including：

5. a kind of quarrying apparatus of low pressure densification oil reservoir, which is characterized in that including：

Well arranges setup module, and for the geology pressure distribution situation according to oil reservoir location to be exploited, setting Horizontal Well is arranged, It include handle up well and producing well, handle up well and the producing well interval setting in the Horizontal Well row；

Production module carries out water filling imbibition for well of handling up described in and recovers the oil, and gulps down using described in displacement effect displacement between well It spits the adjacent producing well of well and carries out displacement oil recovery.

6. a kind of quarrying apparatus of low pressure densification oil reservoir as claimed in claim 5, which is characterized in that the production module packet It includes：

Bored well unit is filled the water, for being filled the water into the well of handling up, when filling the water end of term pressure equal to original formation pressure, is stopped Water filling closes well of handling up, carries out bored well；

Oil-producing unit, for judging whether the closed time of the bored well reaches preset time, if so, to it is described handle up well into Row exploitation；

Loop control unit, for judging that strata pressure is less than or equal to preset pressure in the corresponding control area of well of handling up When, then stop recovering the oil, the well of handling up be filled the water again, bored well, oil recovery.

7. a kind of quarrying apparatus of low pressure densification oil reservoir as claimed in claim 5, which is characterized in that the low pressure densification oil reservoir Quarrying apparatus further include：

Well arranges reset cell, for judging whether the water flood recovery number is greater than preset times, if so, to the well of handling up Volume fracturing reservoir reconstruction is re-started with the producing well, and the position of handle up well and the producing well is carried out mutual It changes.

8. a kind of quarrying apparatus of low pressure densification oil reservoir as claimed in claim 6, which is characterized in that the production module is specific For：

9. a kind of computer storage medium, is stored thereon with computer program, which is characterized in that the computer program is performed When, realize the described in any item methods of claim 1-4.

10. a kind of quarrying apparatus of low pressure densification oil reservoir, which is characterized in that can be held including processor and for storage processor The memory of row instruction, the processor are realized when executing described instruction such as any one of Claims 1-4 the method Step.