CN101122225A - Fire flooding oil extraction method for vertical well gas-injection horizontal well oil extraction - Google Patents
Fire flooding oil extraction method for vertical well gas-injection horizontal well oil extraction Download PDFInfo
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- CN101122225A CN101122225A CNA2007100119646A CN200710011964A CN101122225A CN 101122225 A CN101122225 A CN 101122225A CN A2007100119646 A CNA2007100119646 A CN A2007100119646A CN 200710011964 A CN200710011964 A CN 200710011964A CN 101122225 A CN101122225 A CN 101122225A
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Abstract
The invention relates to a viscous oil exploitation method, in particular to a fire flooding oil exploitation method used for gas injection by a vertical well and oil exploitation by horizontal well. The invention adopts the compound well-layout manner of steam injection by vertical wells and oil exploitation by horizontal wells, which means that six vertical wells are for gas injection and two oil exploitation wells for oil exploitation, or nine vertical wells for gas injection and three oil exploitation wells for oil exploitation. When the wells are drilled, the vertical wells are drilled until they reach the half thickness of an oil layer, and gas is injected above the half thickness of the oil layer. The horizontal wells are under the half thickness of the oil layer. The gas-cap pressure produced by burning of the gas-injected oil layer of the above vertical wells presses the crude oil of the lower part, while the crude oil flows to the horizontal well sections by the self-gravity and then is exploited from the exploitation wells . The invention overcomes the shortcoming that gas channeling can be easily formed horizontally along an oil layer in a high-penetration passage inside the oil layer, and promotes the final recovery rate of the oil layer through fire flooding by fifteen percent.
Description
Technical field:
The present invention relates to a kind of thickened oil recovery method; Especially a kind of vertical that is used for is annotated the fire flood method that the carbonated drink horizontal well recovers the oil.
Background technology:
Viscous crude is the important component part in the petroleum hydrocarbon energy, has than the great potential of conventional crude resource up to several times.China's viscous crude aboundresources, distributed more widely, the Liaohe Oil Field is the main heavy oil development district of China, and the oil reservoir type is more, and buried depth alters a great deal.(see petroleum industry publishing house, Han Xianqing improves oil recovery basis 1,993 131 157-160) in addition, because the viscosity of thickened oil high density is big, flow resistance is big in the exploitation, displacement efficiency, and volume of oil efficient is also low, is difficult to exploit with conventional method.Though adopt thermal process such as steam flooding, steam soak, combustion in situ and viscous crude fireflood, the vertical peupendicular hole is annotated vapour, the vertical oil production method, can a spot of underground crude oil of extraction, but owing to be subjected to the viscous crude interlayer contradiction, contradiction in the layer, horizontal contradiction, inhomogeneous Deng the heavy oil tested layer lithology, and the influence of the high infiltration of lithology band, therefore when annotating vapour, be difficult to steaming process to the pit shaft heating and utilize the SIGD oil production method to overcome gas string phenomenon on the plane, rock stratum, steam is easily in the higher layer bit flow of permeability, hyposmosis lithology oil displacement efficiency is undesirable, finally influences the raising of recovery ratio, if use fireflood horizontal well production method instead, can change the influence of high permeability zone, improve ultimate recovery about 15%, this method is in special reservoirs volume the 5th phase relevant horizontal segment air injection technology October the 10th in 2003, and the combination of injecting well and horizontal production well had report, but horizontal segment air injection (THAI) refers to the thin oil medium, and the well group combination also has essence different with the application.
Summary of the invention:
Purpose of the present invention is in order to overcome above-mentioned shortcoming, and a kind of vertical that is used for that provides is annotated the fire flood method that the carbonated drink horizontal well recovers the oil, it is interior owing to the inhomogeneous interlayer contradiction that causes of lithology to overcome heavy oil wells, and contradiction and horizontal contradiction in the layer make ultimate recovery improve about 15%.This method is not reported by retrieval.
Technical solution of the present invention:
For realizing above-mentioned task, this method takes following steps to finish:
One, fire flood well combined type well group and viscous crude core intersection are selected:
1, combined type well group: adopt vertical to annotate the compound mode of vapour and the compound well group of horizontal well production, promptly be drilled with six mouthfuls of vertical and annotate the vapour well in a plane well group, two mouthfuls of producing wells or nine mouthfuls of vertical are annotated the vapour well, and three mouthfuls of producing wells are exploited;
Viscous crude core intersection and characteristic are selected, viscosity of thickened oil value: 5000～100,000 MPaS, density: 0.95～1g/m
3, freezing point: ± 10 ℃, thickness are at the viscous crude oil reservoir more than 10 meters;
2, vertical notes vapour well is drilled into the above position of oil reservoir 1/2 thickness and annotates vapour, and horizontal well is positioned at the bottom of vertical group oil reservoir 1/2 thickness;
Two, adopt steam injection to stimulate sparking mode, by steamed well heavy oil tested layer in the well is carried out ignition method and see application number " 2005101308608, a kind of stimulated ignition method for fire-flooding driven oil well ".Make the oily spontaneous combustion of its inside, rock stratum, subsequently, the air oxidation agent of reinjecting heating oil reservoir, heat that fluid produced and CO
2Air accumulation forms interior pneumatic jack, is pressed in above the heavy oil tested layer in the top of oil horizon, forces crude oil to flow into extraction in the horizontal well under own wt, because horizontal hole is horizontally through heavy oil tested layer, therefore exploitation all is not subjected to lithologic character controlling, can effectively improve ultimate recovery.
It is 700 meters that vertical in the described combined type well group is annotated vapour well well spacing, and the producing well well spacing is 1km, and taking this hole pattern is for giving full play to the efficient of viscous crude fireflood, improving oil recovery factor to greatest extent.
The advantage that the present invention compared with prior art has is:
Because this method is to utilize steam injection stimulation point ignition method, the displacement of reservoir oil of lighting a fire in vertical is annotated the vapour well utilizes then at oil reservoir top vertical and annotates the CO that is produced behind the vapour
2Gas is squeezed in the top of oil horizon and forms interior pneumatic jack, under the effect of crude oil self gravitation oily stream is flowed in the horizontal well by extraction in interior gas-cap drive and layer.Because there is not the preferential path in the inner lithology of net horizontal section oil reservoir, can not cause the has channeling of oil reservoir horizontal direction, thereby can improve the ultimate recovery of oil reservoir.
In addition, it is comparatively easy that the vertical that this method adopts is annotated the vapour method, can make full use of OW effect (needn't beat new well again) again, has small investment, and instant effect improves ultimate recovery 15%.
Description of drawings:
Accompanying drawing 1 is a work schematic diagram of the present invention.
Fig. 2-the 1st annotates vapour well, three mouthfuls of producing well well location distribution maps for nine mouthfuls among the present invention.
Fig. 2-the 2nd annotates vapour well, two mouthfuls of producing well well location distribution maps for six mouthfuls among the present invention.
Among the figure by 1, producing well, 2, vertical annotates the vapour well, 3, the viscous crude oil reservoir, 4, horizontal well, 5, vertical forms.
The specific embodiment:
The present invention is provided by following examples, is described further below in conjunction with accompanying drawing.
Among Fig. 2-1, Fig. 2-2, the fire flood method is to adopt vertical to annotate the compound well group of oil recovery of vapour well 2 and horizontal well 4, hole pattern is furnished with in a plane well group promptly that six mouthfuls of vertical are annotated 2, two mouthfuls of producing wells 1 of vapour well or nine mouthfuls of vertical are annotated the vapour wells, three mouthfuls of producing wells are exploited.
Among Fig. 1, viscous crude oil reservoir 3 thickness transitivities are selected: viscosity of thickened oil value 5000～100,000 MPaS, density: 0.95～1g/m
3, freezing point: ± 10 ℃, thickness are at the viscous crude oil reservoir more than 10 meters;
Among Fig. 1, vertical notes vapour well 2 is drilled into the above position of oil reservoir 1/2 thickness and annotates vapour, and horizontal well 4 is positioned at the bottom of vertical group 5 oil reservoirs 1/2 thickness;
Embodiment 2:
The fire flood method sparking mode that described vertical is annotated the oil recovery of carbonated drink horizontal well is that steam injection stimulates igniting, application number: " 2005101308608 ", it is a kind ofly by steamed well viscous crude oil steam in jection and air in the well to be implemented igniting, after the oil reservoir heating, by heat and and the CO that fluid produced
2Air accumulation is in the top of oil horizon, form interior pneumatic jack, be pressed in above the heavy oil tested layer, force crude oil under own wt, to flow into extraction in the horizontal well, because horizontal hole is horizontally through heavy oil tested layer, therefore annotate the influence that vapour exploitation is not subjected to lithologic character controlling, can effectively improve ultimate recovery.
Embodiment 3:
Best recovery ratio choose reasonable vertical is annotated the vapour well and the producing well distance is crucial in order to reach, well spacing is 700 meters between the notes vapour well 2 in the vertical for this reason, the producing well well spacing is 1km, vertical is annotated the vapour well in addition and producing well also can select the four-hole vertical to annotate the vapour well, a bite producing well and eight mouthfuls of vertical are annotated the vapour well, and three mouthfuls of producing wells are that a well group carries out fire flood.
Claims (2)
1. one kind is used for the fire flood method that vertical is annotated the oil recovery of carbonated drink horizontal well, and it is characterized in that: described method comprises the steps:
One, fire flood well combined type well group and viscous crude oil reservoir (3) thickness are selected:
(1), combined type well group: vertical is annotated the compound mode of vapour well and the compound well group of horizontal well production, promptly is drilled with six mouthfuls of vertical and annotates vapour well (2) in a plane well group, and two mouthfuls of producing wells (1) or nine mouthfuls of vertical are annotated the vapour well, and three mouthfuls of producing wells are exploited;
Viscous crude core intersection and characteristic are selected, viscosity of thickened oil value: 5000～100,000 MPaS, density: 0.95～1g/m
3, freezing point: ± 10 ℃, thickness are at the viscous crude oil reservoir more than 10 meters;
(2), vertical annotates vapour wells (2) and is drilled into the above position of oil reservoir 1/2 thickness and annotates vapour, horizontal well (4) is positioned at the bottom of vertical group oil reservoir 1/2 thickness;
Two, adopt steam injection to stimulate sparking mode, by steamed well the concrete ignition method of lighting a fire of viscous crude oil reservoir (3) in the well is seen application number " 2005101308608; a kind of stimulated ignition method for fire-flooding driven oil well ", make the oily spontaneous combustion of its inside, rock stratum, subsequently, the air oxidation agent of reinjecting heating oil reservoir, heat that fluid produced and CO
2Air accumulation is in the top of oil horizon, and pneumatic jack is pressed in above the heavy oil tested layer in forming, and forces crude oil to flow under own wt in the horizontal well (4) by extraction.
2. a kind of vertical that is used for according to claim 1 is annotated the fire flood method that the carbonated drink horizontal well recovers the oil, and it is characterized in that: it is 700 meters that the vertical in the described combined type well group is annotated vapour well (2) well spacing, and the producing well well spacing is 1km.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNA2007100119646A CN101122225A (en) | 2007-07-05 | 2007-07-05 | Fire flooding oil extraction method for vertical well gas-injection horizontal well oil extraction |
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| CNA2007100119646A CN101122225A (en) | 2007-07-05 | 2007-07-05 | Fire flooding oil extraction method for vertical well gas-injection horizontal well oil extraction |
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| CN101798915A (en) * | 2010-04-26 | 2010-08-11 | 胡士清 | Method for improving recovery ratio of thick-layer massive thickened oil by utilizing subsection fireflooding exploitation |
| CN101818637A (en) * | 2010-04-26 | 2010-09-01 | 胡士清 | Method for improving recovery rate of thick massive viscous oil reservoir by controlling burning gas injection speed |
| CN102747997A (en) * | 2012-07-13 | 2012-10-24 | 中国石油天然气股份有限公司 | Fire-flooding exploitation method used in later period of steam assisted gravity drainage (SAGD) of heavy oil reservoir |
| CN102758603A (en) * | 2012-07-10 | 2012-10-31 | 中国石油天然气股份有限公司 | Later-period air injection exploitation method for super heavy oil reservoir using steam assisted gravity drainage (SAGD) exploitation |
| RU2468193C1 (en) * | 2011-06-08 | 2012-11-27 | Открытое акционерное общество "Татнефть" им. В.Д. Шашина | Development method of high-viscosity oil deposit in multiple-formation layer-by-layer nonhomogeneous header |
| CN103161437A (en) * | 2013-03-05 | 2013-06-19 | 中国石油天然气股份有限公司 | Fleeing sealing sand-prevention ignition method of fireflooding oil extraction |
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| CN102076930B (en) * | 2008-04-30 | 2014-01-29 | 世界能源系统有限公司 | Method for increasing the recovery of hydrocarbons |
| CN104011331A (en) * | 2011-10-21 | 2014-08-27 | 尼克森能源无限责任公司 | Steam Assisted Gravity Drainage Processes With The Addition Of Oxygen Addition |
| CN102203378B (en) * | 2009-02-05 | 2015-08-12 | Cft科技(Hk)有限公司 | Reclaim or storage practice |
| CN105257269A (en) * | 2015-10-26 | 2016-01-20 | 中国石油天然气股份有限公司 | Oil recovery method combining steam flooding and fire flooding |
| CN106223911A (en) * | 2016-08-01 | 2016-12-14 | 中嵘能源科技集团有限公司 | A kind of to deep buried hill reservoir note strong pressure-air, oxygen-enriched flooding method |
| CN106246148A (en) * | 2016-08-01 | 2016-12-21 | 中嵘能源科技集团有限公司 | A kind of use continuous pipe to the oil production method of horizontal well air injection |
| CN106884639A (en) * | 2017-04-05 | 2017-06-23 | 中国石油天然气股份有限公司 | A kind of three-dimensional fireflood method of multilayer laminar oil reservoir |
| RU2626492C1 (en) * | 2016-04-26 | 2017-07-28 | Публичное акционерное общество "Татнефть" имени В.Д. Шашина | Mining method for multi-layered inhomogeneous oil reservoir |
| CN107939373A (en) * | 2018-01-17 | 2018-04-20 | 西南石油大学 | A kind of new combustion in situ heavy oil development well pattern structure and method |
| CN108868718A (en) * | 2018-07-09 | 2018-11-23 | 中国石油天然气股份有限公司 | A kind of combination thermal process having gas-cap heavy oil reservoir |
| CN109723417A (en) * | 2019-01-07 | 2019-05-07 | 中国海洋石油集团有限公司 | A kind of recovery method turning fireflood suitable for oil-sand SAGD development late stage |
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| CN102076930B (en) * | 2008-04-30 | 2014-01-29 | 世界能源系统有限公司 | Method for increasing the recovery of hydrocarbons |
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| CN101818637A (en) * | 2010-04-26 | 2010-09-01 | 胡士清 | Method for improving recovery rate of thick massive viscous oil reservoir by controlling burning gas injection speed |
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| CN106223911B (en) * | 2016-08-01 | 2018-08-14 | 中嵘能源科技集团有限公司 | It is a kind of to note strong pressure-air, oxygen-enriched flooding method to deep buried hill reservoir |
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