CN102817568B - Method for exploiting crude oil from heavy oil reservoir by using borehole seismic auxiliary gas foam flooding - Google Patents
Method for exploiting crude oil from heavy oil reservoir by using borehole seismic auxiliary gas foam flooding Download PDFInfo
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Abstract
The invention relates to a method for exploiting crude oil from a heavy oil reservoir by using borehole seismic and gas foam flooding. The method comprises the steps of: arranging horizontal injection wells and horizontal production wells which are in the same plane and are mutually parallel on the lower part of the same oil layer; arranging a plurality of vertical wells between every two adjacent horizontal injection well and horizontal production well, wherein the vertical wells are drilled to the top of the oil layer, and harmonic borehole vibration oil displacement systems are arranged in the shafts of the vertical wells; and continuously injecting gas foam in the horizontal injection wells, starting the harmonic borehole vibration oil displacement systems of the vertical wells, continuously generating harmonic seismic waves in the oil layer to ensure that the gas foam entering into the pores of the oil layer continuously vibrates under the action of seismic waves, and strongly extruding and shearing gas foam fluid, so that a plurality of bubbles continuously collide with the inner surfaces of the pores to be divided into small bubbles with higher flowing capacity and weak air resistance effect to the pores; and entering the small bubbles into the deep part of the oil layer to displace the crude oil among the wells.
Description
Technical field
The invention relates to the exploitation method of heavy crude reservoir in field of petroleum exploitation, particularly relate to a kind of method that heavy crude reservoir utilizes borehole seismic assist gas foam flooding crude oil extraction.
Background technology
Heavy crude reservoir adopts the method for steam injection oil recovery by heating to exploit usually, but for the stronger heavy crude reservoir of heterogeneous body, simple steam injection easily causes vapour to alter; Simultaneously, the deep layer of 1500 meters and super deep-layer heavy crude reservoir are greater than for reservoir buried depth, inject steam from well head to oilbearing stratum way very large along journey heat waste, steam quality is usually less than 40%, greatly reduce the specific volume of steam, the oil reservoir volume causing steam to involve reduces, and the thermal efficiency reduces.In order to improve the development effectiveness of strong heterogeneous body, deep layer and super deep-layer heavy crude reservoir, in recent ten years, domesticly in gas foam flooding, a large amount of desk research and field trial has been carried out.The gas foam flooding of heavy crude reservoir refers to and add nitrogen, CO in steam
2etc. non-condensation gas, add certain density surfactant simultaneously and inject oil reservoir as frother and gas simultaneously.Usually, under reservoir pressure, depth conditions, the volume ratio of steam and non-condensate gas is set as 1: 1, and the concentration of surfactant is about 0.5% (mass ratio of surfactant and steam cold water equivalent).Injecting the process of oil reservoir, surfactant solution bubbles owing to rubbing to produce in pit shaft with steam and non-condensate gas, to shaft bottom show bubble injection oil reservoir, is therefore called gas foam flooding.Laboratory experiment shows, due to the plugging action of foam, gas foam flooding technology can obviously suppress the gas vapour of heterogeneous reservoir to be altered, and expands the swept volume of injected media; Simultaneously due to the effect of non-condensate gas, under deep layer, super deep-layer heavy crude reservoir condition, the volume of unit mass injected media compares pure steam to be increased greatly, effectively counteract the unfavorable conditions of steam quality loss, obviously expand the swept volume in deep layer and super deep-layer heavy crude reservoir, compare the recovery ratio that simple exploitation via steam injection technology can improve more than 10%.But in the field trial process of reality, because the flowing of foam in oil reservoir porous media is hole seepage flow, fluid stable, flowing velocity is well below the pipe stream in pit shaft, therefore the frequency that bubble dynamically produces is far smaller than the frequency that bubble is dynamically vanished, add the suction-operated of reservoir rock surface Surfactant, a large amount of bubbles disappears within the scope of 10 meters, near wellbore zone, the gas foam injected becomes biphase gas and liquid flow again, because the flowing velocity of gas phase is far longer than liquid phase, therefore the slippage effect of gas is obvious, has channeling frequency increases, gas foam flooding improves the effect that simple steam flooding vapour alters and has a greatly reduced quality in actual oil reservoir, the Liaohe River, the field trial of xinjiang viscous crude oil oil reservoir shows, gas foam flooding is compared steam flooding and is improved recovery ratio only 2 ~ 3%, in addition, because surfactant cost is higher, therefore when improving recovery ratio amplitude and being lower, economic advantages are also not obvious.
Described in upper, gas foam flooding in actual oil reservoir, why vanish in a large number by foam, has channeling occurs in a large number, the most important reason that development effectiveness is had a greatly reduced quality is, fluid stable in oil reservoir hole, and the frequency causing bubble dynamically to produce is less than the frequency of bubble-break, thus bubble constantly reduces, therefore, in oil reservoir, constantly will produce bubble, then need the unstable state flowing environment that creation bubble constantly produces.
CN1190151A discloses a kind of harmonic well vibration reservoir oil displacing system, and the object of its invention is to design a kind of down-hole block focus that can be widely used in artificial earthquake and recover the oil.Its technical scheme devises one at well head to support vibroplatform by four columns block form cluster spring in upright arrangement---the simple oscialltor system that eccentric vibration mechanism becomes, one is equivalent in the weight vibrating tube lower going-into-well of bar spring, hang on a vibration table and keeps certain unsettled distance with shaft bottom, forms a down-hole weight and vibrate with well head vibroplatform and the binary quality spring vibration system that vibrates.The driving frequency of mouth eccentric bobbing machine is regulated on ground, the natural frequency of it and binary quality spring vibration system is resonated, now, down-hole weight amplitude reaches maximum, constantly fierce hammering artificial bottom of a well, form an artificially seismic source in deep-well stratum below weathering zone, tens mouthfuls of oily well yields in Artificial Seismic Wave impact scope are increased by seismic wave affects, reach the object that block vibration increases oil.The advantage of this invention is: 1) well head friction, non-environmental-pollution problem, on the health of ground handling operator and above ground structure without any impact, and can spread; 2) system mechanics efficiency is high, and energy consumption is low; 3) the formation treatment degree of depth of down-hole harmonic vibration reservoir oil displacing system is restricted hardly, meets the trend of oil field development to Deep Development.But this invention has three subject matters: one is that this invention is only described for the hardware equipped of harmonic well vibration reservoir oil displacing system and operating principle, to its concrete operations parameter in the actual use procedure of Oil Field, the not detailed quantification explanation of operation implementation step; Two is that this invention does not illustrate this harmonic well vibration reservoir oil displacing system in use, and oil well adopts which kind of well pattern, well spacing, well type to produce, and injects oil reservoir, the need of Injection Well etc. the need of additional displacing medium; Three is when without injection displacing medium, namely when without additional driving force, due to the wetability effect of the blowhole inner surface of oil reservoir own, and the trapping effect of the capillary force of tiny venturi, the seismic wave only relying on earthquake to produce, is difficult to the mother oil displacement between well to oil well shaft bottom.Therefore, this invention is only applicable to increase oily mode as one, but not reservoir oil displacing system.
Thus, the present inventor relies on experience and the practice of being engaged in relevant industries for many years, proposes a kind of method that heavy crude reservoir utilizes borehole seismic assist gas foam flooding crude oil extraction, to overcome the defect of prior art.
Summary of the invention
A kind of heavy crude reservoir is the object of the present invention is to provide to utilize the method for borehole seismic assist gas foam flooding crude oil extraction, to solve the problems such as fluid stable in conventional gas foam flooding process, has channeling be fast; Solve conventional harmonic well vibration reservoir oil displacing system effectively the problems such as the displacement of reservoir oil cannot be realized without during additional injected media simultaneously.
Another object of the present invention is to provide a kind of heavy crude reservoir to utilize the method for borehole seismic assist gas foam flooding crude oil extraction, can on conventional gas foam flooding basis, improve recovery ratio further, economic benefit is significantly better than conventional gas foam flooding.
The object of the present invention is achieved like this, a kind of heavy crude reservoir utilizes the method for borehole seismic assist gas foam flooding crude oil extraction, oil reservoir bottom in same oil reservoir is disposed and is in same plane and the horizontal injection well be parallel to each other and horizontal production well, many mouthfuls of peupendicular holes are disposed between adjacent horizontal injection well and horizontal production well, be drilled into top of oil horizon under this peupendicular hole, under in peupendicular hole pit shaft, enter harmonic well vibration reservoir oil displacing system, from the continuous injecting gas foam of horizontal injection well, start the harmonic well vibration reservoir oil displacing system of peupendicular hole simultaneously, constantly in oil reservoir, produce harmonic wave seismic wave, the gas foam entered in oil reservoir interstitial space is made to produce sustained vibration under the effect of seismic wave, and strong extruding and shear action are produced to gas aerated fluid, a large amount of bubble and internal pore surface constantly collide, division becomes numerous and has higher fluid ability and the minute bubbles weak to the gas block phenomenon of hole, minute bubbles enter the crude oil between oil reservoir deep displacement well, improve the recovery ratio of heavy crude reservoir thus.
In a better embodiment of the present invention, described exploitation method comprises the following steps:
(1) horizontal flooding pattern is set in heavy crude reservoir production zone, a pair Injection Well and producing well are set in same oil reservoir;
(2) 2 ~ 4 mouthfuls of peupendicular holes are set between adjacent Injection Well and the horizontal segment of producing well as source borehole;
(3) in peupendicular hole, harmonic well vibration reservoir oil displacing system is installed;
(4) open harmonic well vibration reservoir oil displacing system switch, start to produce continuous print underground vibrating;
(5) continuous injecting gas foam in horizontal injection well;
(6) producing well drives a well continuous seepage.
In a better embodiment of the present invention, between step (3) and step (4), use the electronics frequency modulator of vertical well head to regulate the driving frequency of reservoir oil displacing system vibration, the natural frequency of itself and system is resonated.
In a better embodiment of the present invention, described heavy crude reservoir refers to that underground viscosity of crude is greater than the heavy crude reservoir of 100 centipoises.
In a better embodiment of the present invention, in described step (1), the horizontal segment of described adjacent Injection Well and producing well to be in same plane and to be parallel to each other.
In a better embodiment of the present invention, in described step (1), the horizontal segment of described Injection Well and producing well is all positioned at oil reservoir bottom, and 2 meters, boundary at the bottom of distance oil reservoir.
In a better embodiment of the present invention, in described step (1), the horizontal section length of described Injection Well and producing well 300 ~ 500 meters.
In a better embodiment of the present invention, in described step (2), described peupendicular hole is evenly disposed along the horizontal segment of Injection Well and producing well.
In a better embodiment of the present invention, in described step (2), the quantity of described peupendicular hole is determined according to the horizontal section length of Injection Well and producing well; Distance between adjacent peupendicular hole is at about 100 meters; Specifically, when horizontal section length is 300 meters, in the middle of horizontal segment, evenly dispose 2 mouthfuls of peupendicular holes; When horizontal section length is 500 meters, in the middle of horizontal segment, evenly dispose 4 mouthfuls of peupendicular holes.
In a better embodiment of the present invention, in described step (2), for the injury avoiding the high-frequency of harmonic well vibration reservoir oil displacing system in peupendicular hole shaft bottom, high strength hammering causes the pore structure of oil reservoir own (causes oil reservoir degree of porosity to reduce, permeability reduction), described peupendicular hole shaft bottom is not less than 30 meters apart from the vertical distance between horizontal injection well and the horizontal segment of producing well.
In a better embodiment of the present invention, when oil reservoir is thick be not less than 32 meters time, peupendicular hole is drilled into the top interface of horizontal injection well and producing well place oil reservoir; When core intersection is less than 32 meters (within horizontal segment distance 30 meters, the oil reservoir top circle of Injection Well and producing well), peupendicular hole is drilled into the top of horizontal injection well and producing well place oil reservoir, and apart from the vertical distance 30 meters between horizontal injection well and the horizontal segment of producing well.
In a better embodiment of the present invention, in described step (3), described peupendicular hole takes conventional cannula completion, clamp-ons the thick cement of 1.5m to its artificial bottom of a well, arranges that diameter is casing diameter 4/5, thickness is the riveting stake of 0.3m at TOC.
In a better embodiment of the present invention, described resonance frequency is 80 ~ 100 jig frequencies/min.
In a better embodiment of the present invention, described every jig frequency carries out hammering with the power of 3 ~ 5KN to peupendicular hole shaft bottom.
In a better embodiment of the present invention, in described step (5), gas in described gas foam is the mist of nitrogen and steam, frother is surfactant, well head steam quality more than 75%, under oil reservoir (pressure, the degree of depth) condition, the volume ratio of steam and nitrogen is set as 1: 1, and the concentration of surfactant is about 0.5% (mass ratio of surfactant and steam cold water equivalent).
From the above mentioned, heavy crude reservoir provided by the invention utilizes the method for borehole seismic assist gas foam flooding crude oil extraction, adopt harmonic well vibration reservoir oil displacing system as man-made explosion, under CSW effect, make the strong collision that the gas foam of porous media interstitial space in injection oilbearing stratum is subject to from blowhole inner surface, extruding and shear action, its nowed forming is unsteady state flow, under this fluidised form condition, a large amount of bubble is subject to the continuous collision of the coarse inner surface of hole, extruding and shearing, constantly split into numerous minute bubbles, because minute bubbles have higher fluid ability, weak to the gas block phenomenon of hole, therefore oil reservoir deep can be entered, crude oil between displacement well, the method is combined with the advantage that down-hole artificial vibration produces seismic wave and gas foam flooding, effectively to inhibit under the stable state displacement condition of conventional gas foam flooding air pocket in oil reservoir directly to vanish and cause the unfavorable factor of too early has channeling, effectively expand the interval and swept volume of the existence of gas foam in oil reservoir, recovery factor of heavy oil reservoir more than 15 ~ 20% can be improved, ultimate recovery can reach more than 50%, and economic benefit is significantly better than conventional gas foam flooding.
Accompanying drawing explanation
The following drawings is only intended to schematically illustrate the present invention and explain, not delimit the scope of the invention.Wherein:
Fig. 1: for heavy crude reservoir of the present invention utilizes well location schematic diagram in the method for borehole seismic assist gas foam flooding crude oil extraction.
Drawing reference numeral:
Injection Well 11 producing well 12 peupendicular hole 21,22,23
Riveting stake 211,221,231 cement shaft bottom 212,222,232
Detailed description of the invention
In order to there be understanding clearly to technical characteristic of the present invention, object and effect, now contrast accompanying drawing and the specific embodiment of the present invention is described.
The present invention proposes a kind of method that heavy crude reservoir utilizes borehole seismic assist gas foam flooding crude oil extraction, dispose bottom oil reservoir in same oil reservoir and be in same plane and the horizontal injection well be parallel to each other and horizontal production well, between adjacent horizontal injection well and horizontal production well, horizontal segment along this horizontal injection well and horizontal production well evenly disposes 2 ~ 4 mouthfuls of peupendicular holes, described peupendicular hole is drilled into top of oil horizon downwards, installs harmonic well vibration reservoir oil displacing system (this harmonic well vibration reservoir oil displacing system is prior art) in peupendicular hole pit shaft, from the continuous injecting gas foam of horizontal injection well, start the harmonic well vibration reservoir oil displacing system of peupendicular hole simultaneously, it is made constantly in oil reservoir, to produce harmonic wave seismic wave, thus manually astable reservoir porous interstitial space flox condition is produced in oil reservoir, the gas foam entered in oil reservoir interstitial space is made to produce sustained vibration under the effect of seismic wave, and strong extruding and shear action are produced to gas aerated fluid, in this unstable state flow process, a large amount of bubble and internal pore surface constantly collide, division becomes numerous and has higher fluid ability and the minute bubbles weak to the gas block phenomenon of hole, minute bubbles enter the crude oil between oil reservoir deep displacement well, improve the recovery ratio of heavy crude reservoir thus.
The major oil reservoir of heavy crude reservoir described in the present invention buries deeply, and average buried depth is 1950m, and initial reservoir pressure is 18.2MPa, and the original reservoir temperature is 64 DEG C; Under reservoir temperature, Crude viscosity is 550 centipoises, the effectively average 18m of core intersection.
As shown in Figure 1, heavy crude reservoir of the present invention utilizes the method for borehole seismic assist gas foam flooding crude oil extraction to be described below:
Horizontal flooding pattern is set in heavy crude reservoir production zone, a pair horizontal injection well 11 and horizontal production well 12 are set in same oil reservoir; Well spacing between horizontal injection well 11 and producing well 12 is 200 meters, and Injection Well 11 is positioned at oil reservoir bottom with the horizontal segment of producing well 12, and 2 meters, boundary at the bottom of distance oil reservoir, Injection Well 11 is 400 meters with the horizontal section length of producing well 12.3 mouthfuls of peupendicular holes 21,22,23 are evenly set between this adjacent Injection Well 11 and horizontal segment of producing well 12 as source borehole; Distance between neighboring vertical well 21,22,23 is 100 meters; Peupendicular hole 21,22,23 takes conventional cannula completion, in oil reservoir top completion, vertical distance between the artificial bottom of a well of finishing drilling and the horizontal segment of Injection Well 11 and producing well 12 is 30 meters, clamp-on the thick cement of 1.5m to its artificial bottom of a well and form cement shaft bottom 212,222,232, put at the top in cement shaft bottom diameter be the casing diameter 4/5 of peupendicular hole 21,22,23, thickness is the riveting stake 211,221,231 of 0.3m.Harmonic well vibration reservoir oil displacing system (this harmonic well vibration reservoir oil displacing system is open by patent application C N1190151A) is installed in peupendicular hole 21,22,23; Use the electronics frequency modulator of peupendicular hole 21,22,23 well head to regulate the driving frequency of drive system vibration, the natural frequency of itself and system is resonated; Resonance frequency is 90 jig frequencies/min, and every jig frequency carries out hammering with the power of 3.5KN to peupendicular hole 21,22,23 shaft bottom; After adjustment, open the switch of harmonic well vibration reservoir oil displacing system, start to produce continuous print underground vibrating; Continuous injecting gas foam in horizontal injection well 11; Gas in gas foam is the mist of nitrogen and steam, frother is surfactant, the mass dryness fraction that steam due to well head steam quality 80% arrives shaft bottom is 60%, under oil reservoir (pressure 18.2MPa, the degree of depth 1950 meters) condition, the volume ratio of steam and nitrogen is set as 1: 1, therefore, steam injection speed is 100 tons/day, and nitrogen injection rate is 509m
3/ sky; Concentration due to surfactant is about 0.5% (mass ratio of surfactant and steam cold water equivalent), and therefore, the injection rate of surfactant is 0.5 ton/day.Producing well drives a well continuous seepage, when producing well daily oil production is less than 1.0 tons/day, produces and terminates.
Table 1 is the condition of production statistics of the present embodiment.
Table 1
As shown in table 1, from the condition of production, adopt conventional gas foam flooding technology to produce the development scheme terminated, the economical and effective production time is about 11 years, and cumulative oil production is about 10.55 × 10 always
4t, ultimate recovery is about 41%, and the exploitation method of the present embodiment, the economical and effective production time is about 12.8, and cumulative oil production is about 15.50 × 10
4t, ultimate recovery is about 60.2%, has increased substantially 19.2 percentage points than the technological development of conventional gas foam flooding.
From the above mentioned, method provided by the present invention has following technique effect:
Solve the problem that fluid stable in conventional gas foam flooding process, has channeling are fast, also solve conventional harmonic well vibration reservoir oil displacing system without the problem that effectively cannot realize the displacement of reservoir oil during additional injected media simultaneously.Heavy crude reservoir of the present invention utilizes the method for borehole seismic assist gas foam flooding crude oil extraction, utilize harmonic well vibration reservoir oil displacing system as man-made explosion, under CSW effect, make the strong collision that the gas foam of porous media interstitial space in injection oilbearing stratum is subject to from blowhole inner surface, extruding and shear action, its nowed forming is unsteady state flow, under this fluidised form condition, a large amount of bubble is subject to the continuous collision of the coarse inner surface of hole, extruding and shearing, constantly split into numerous minute bubbles, because minute bubbles have higher fluid ability, weak to the gas block phenomenon of hole, therefore oil reservoir deep can be entered, crude oil between displacement well, the method is combined with the advantage that down-hole artificial vibration produces seismic wave and gas foam flooding, effectively to inhibit under the stable state displacement condition of conventional gas foam flooding air pocket in oil reservoir directly to vanish and cause the unfavorable factor of too early has channeling, effectively expand the interval and swept volume of the existence of gas foam in oil reservoir, recovery factor of heavy oil reservoir more than 15 ~ 20% can be improved, ultimate recovery can reach more than 50%, and economic benefit is significantly better than conventional gas foam flooding.
The foregoing is only the schematic detailed description of the invention of the present invention, and be not used to limit scope of the present invention.Any those skilled in the art, equivalent variations done under the prerequisite not departing from design of the present invention and principle and amendment, all should belong to the scope of protection of the invention.
Claims (10)
1. a heavy crude reservoir utilizes the method for borehole seismic assist gas foam flooding crude oil extraction, oil reservoir bottom in same oil reservoir is disposed and is in same plane and the horizontal injection well be parallel to each other and horizontal production well, many mouthfuls of peupendicular holes are disposed between adjacent horizontal injection well and horizontal production well, be drilled into top of oil horizon under this peupendicular hole, under in peupendicular hole pit shaft, enter harmonic well vibration reservoir oil displacing system, from the continuous injecting gas foam of horizontal injection well, start the harmonic well vibration reservoir oil displacing system of peupendicular hole simultaneously, constantly in oil reservoir, produce harmonic wave seismic wave, the gas foam entered in oil reservoir interstitial space is made to produce sustained vibration under the effect of seismic wave, and strong extruding and shear action are produced to gas aerated fluid, a large amount of bubble and internal pore surface constantly collide, division becomes numerous and has higher fluid ability and the minute bubbles weak to the gas block phenomenon of hole, minute bubbles enter the crude oil between oil reservoir deep displacement well, improve the recovery ratio of heavy crude reservoir thus.
2. heavy crude reservoir as claimed in claim 1 utilizes the method for borehole seismic assist gas foam flooding crude oil extraction, it is characterized in that described exploitation method comprises the following steps:
(1) horizontal flooding pattern is set in heavy crude reservoir production zone, a pair Injection Well and producing well are set in same oil reservoir;
(2) 2 ~ 4 mouthfuls of peupendicular holes are set between adjacent Injection Well and the horizontal segment of producing well as source borehole;
(3) in peupendicular hole, harmonic well vibration reservoir oil displacing system is installed;
(4) open harmonic well vibration reservoir oil displacing system switch, start to produce continuous print underground vibrating;
(5) continuous injecting gas foam in horizontal injection well;
(6) producing well drives a well continuous seepage.
3. heavy crude reservoir as claimed in claim 2 utilizes the method for borehole seismic assist gas foam flooding crude oil extraction, it is characterized in that: between step (3) and step (4), use the electronics frequency modulator of vertical well head to regulate the driving frequency of harmonic well vibration reservoir oil displacing system vibration, the natural frequency of itself and harmonic well vibration reservoir oil displacing system is resonated.
4. heavy crude reservoir as claimed in claim 2 utilizes the method for borehole seismic assist gas foam flooding crude oil extraction, it is characterized in that: described heavy crude reservoir refers to that underground viscosity of crude is greater than the heavy crude reservoir of 100 centipoises.
5. heavy crude reservoir as claimed in claim 2 utilizes the method for borehole seismic assist gas foam flooding crude oil extraction, it is characterized in that: in described step (1), the horizontal segment of described adjacent Injection Well and producing well to be in same plane and to be parallel to each other; In described step (1), the horizontal segment of described Injection Well and producing well is all positioned at oil reservoir bottom, and 2 meters, boundary at the bottom of distance oil reservoir; In described step (1), the horizontal section length of described Injection Well and producing well 300 ~ 500 meters; In described step (2), described peupendicular hole is evenly disposed along the horizontal segment of Injection Well and producing well.
6. heavy crude reservoir as claimed in claim 5 utilizes the method for borehole seismic assist gas foam flooding crude oil extraction, it is characterized in that: in described step (2), and the quantity of described peupendicular hole is determined according to the horizontal section length of Injection Well and producing well; Distance between adjacent peupendicular hole is at about 100 meters; Specifically, when horizontal section length is 300 meters, in the middle of horizontal segment, evenly dispose 2 mouthfuls of peupendicular holes; When horizontal section length is 500 meters, in the middle of horizontal segment, evenly dispose 4 mouthfuls of peupendicular holes.
7. heavy crude reservoir as claimed in claim 2 utilizes the method for borehole seismic assist gas foam flooding crude oil extraction, it is characterized in that: in described step (2), for the injury avoiding the high-frequency of harmonic well vibration reservoir oil displacing system in peupendicular hole shaft bottom, high strength hammering causes the pore structure of oil reservoir own, described peupendicular hole shaft bottom is not less than 30 meters apart from the vertical distance between horizontal injection well and the horizontal segment of producing well.
8. heavy crude reservoir as claimed in claim 2 utilizes the method for borehole seismic assist gas foam flooding crude oil extraction, it is characterized in that: in described step (3), described peupendicular hole takes conventional cannula completion, clamp-on the thick cement of 1.5m to its artificial bottom of a well, arrange at TOC that diameter is casing diameter 4/5, thickness is the riveting stake of 0.3m.
9. heavy crude reservoir as claimed in claim 3 utilizes the method for borehole seismic assist gas foam flooding crude oil extraction, it is characterized in that: described resonance frequency is 80 ~ 100 jig frequencies/min; Described every jig frequency carries out hammering with the power of 3 ~ 5KN to peupendicular hole shaft bottom.
10. heavy crude reservoir as claimed in claim 2 utilizes the method for borehole seismic assist gas foam flooding crude oil extraction, it is characterized in that: in described step (5), gas in described gas foam is the mist of nitrogen and steam, frother is surfactant, well head steam quality more than 75%, the volume ratio of steam and nitrogen is set as 1:1 under reservoir conditions, and the mass concentration of surfactant is 0.5%.
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| CN103452540B (en) * | 2013-09-18 | 2016-01-13 | 张方礼 | Limit water viscous oil field operated by steam two-dimensional proportion physical simulation device and using method thereof |
| CN103939044B (en) * | 2014-05-07 | 2016-06-29 | 中国石油大学(华东) | A kind of high-power resonant wave-chemically composited transfer drive device and transfer drive method |
| CN106934200B (en) * | 2015-12-31 | 2020-04-24 | 王香增 | Estimation of recovery coefficients in foam-driven hydrocarbon reservoirs |
| CN109098700A (en) * | 2018-09-18 | 2018-12-28 | 中国石油大学(华东) | Artificial Seismic Wave composite foam foam stability evaluating apparatus and method under the conditions of oil-containing |
| CN109085169A (en) * | 2018-09-18 | 2018-12-25 | 中国石油大学(华东) | The interior blistering of Artificial Seismic Wave compound vacuole foam layer and dynamic foam stabilizing integration device for evaluating performance and method under reservoir condition |
| CN110554424B (en) * | 2019-09-04 | 2021-01-12 | 田晓峰 | Artificial seismic source device for exploration |
| CN113818859A (en) * | 2020-06-19 | 2021-12-21 | 中国石油化工股份有限公司 | Limit well spacing determination method, limit well spacing determination method and limit well spacing determination device for low-permeability oil reservoir |
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| CN1190151A (en) * | 1997-12-23 | 1998-08-12 | 中国石油天然气总公司石油勘探开发科学研究院廊坊分院天然气勘探开发研究所 | Harmonic well vibration reservoir oil displacing system |
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| US8157011B2 (en) * | 2010-01-20 | 2012-04-17 | Schlumberger Technology Corporation | System and method for performing a fracture operation on a subterranean formation |
| US20110188347A1 (en) * | 2010-01-29 | 2011-08-04 | Schlumberger Technology Corporation | Volume imaging for hydraulic fracture characterization |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1190151A (en) * | 1997-12-23 | 1998-08-12 | 中国石油天然气总公司石油勘探开发科学研究院廊坊分院天然气勘探开发研究所 | Harmonic well vibration reservoir oil displacing system |
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