CN103628848B - Multidirectional interlayer displacement in flooding oil production method and system - Google Patents
Multidirectional interlayer displacement in flooding oil production method and system Download PDFInfo
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- CN103628848B CN103628848B CN201310629331.7A CN201310629331A CN103628848B CN 103628848 B CN103628848 B CN 103628848B CN 201310629331 A CN201310629331 A CN 201310629331A CN 103628848 B CN103628848 B CN 103628848B
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 37
- 239000011229 interlayer Substances 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 139
- 239000010410 layer Substances 0.000 claims abstract description 49
- 238000011084 recovery Methods 0.000 claims abstract description 47
- 238000002347 injection Methods 0.000 claims abstract description 45
- 239000007924 injection Substances 0.000 claims abstract description 45
- 239000003921 oil Substances 0.000 abstract description 136
- 238000000034 method Methods 0.000 abstract description 13
- 238000000605 extraction Methods 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 6
- 239000010779 crude oil Substances 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000035699 permeability Effects 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000019994 cava Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
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Abstract
The present invention relates to the method and system that a kind of Multidirectional interlayer displacement in flooding recovers the oil, system includes water injection well and collecting well group, and collecting well group is made up of 2～20 mouthfuls of producing wells.According to the regularity of distribution of oil reservoir, 1～10 layer of water filling circle is set.Water injection well is arranged on every layer of water filling circle, and collecting well group is arranged between center or two water filling circles of water filling circle.On every layer of water filling circle, between the quantity of water injection well, the center of water filling circle and/or two water filling circles, the quantity of collecting well group determines according to the size of oil-producing region oil pool distribution.Oil reservoir trap structure, oil-layer distribution and core intersection is grasped according to oil exploration technology, multi-faceted toward oil-bearing stratum flooding, the displacement of reservoir oil at collecting well group by water injection well, utilize the oil of collecting well group extraction oil reservoir.The displacement of reservoir oil is the same layer position displacement of reservoir oil, and the water injection rate of oil-bearing stratum flooding is 10～30 times of oil production, by earth source heat pump, the temperature of water filling is brought up to 60～70 DEG C.The present invention to a some displacement of reservoir oil of recovering the oil, improves the recovery ratio of crude oil by multiple injection points.
Description
Technical field
The invention belongs to technical field of petroleum extraction, relate to the method and system that a kind of Multidirectional interlayer displacement in flooding recovers the oil.
Background technology
The initial stage of oil extraction is to only rely on natural energy crude oil extraction, is typically commonly called as primary oil recovery, and its recovery ratio is usually no more than 15%.After oil extraction certain phase, owing to stratum energy space is in debt, need to make up the volume in debt of extraction with water filling or gas injection.Supplementing stratum energy and exploit the method in oil field and be referred to as secondary oil recovery, its recovery ratio is usually no more than 50%.By injecting work agent to stratum or introducing the oil production method of other energy and be referred to as tertiary oil recovery, also referred to as EOR method.But, after water flooding recovery process and EOR method are exploited, the advanced level in the current world is 65%～70%.Therefore, existing production technique causes substantial amounts of petroleum resources to be detained underground.According to statistics, recovery ratio often improves 1%, and the whole nation will increase oil production rate 1.5 hundred million tons.
Notification number is that the Chinese invention patent of CN 101956544 B discloses the method that multilateral well of a kind of many ends utilizes flood suction to recover the oil, and this patent is: " beat first well and second mouthful of well；Utilizing conventional drilling technologies to bore water filling branch at first well, the oil reservoir under water layer and water layer passes through in water filling branch；Water filling branch bore after, under enter slot pipe trench water flowing layer and oil reservoir；Owing to aquifer pressure is high, formation pressure is low, and the water of water layer automatically flows into oil reservoir, supplements energy for oil reservoir；After entering under water filling branch slot pipe, cementing plug closure branch and the first well binding site；Use second mouthful of well that oil reservoir is recovered the oil；Conventional drilling technologies is utilized to bore the first oil recovery branch and the second oil recovery branch at first well, it is achieved the oil recovery function of this first well ".This patent realizes two kinds of functions of a bite well oil-extracting and water-injecting, has saved well slot, has provided convenience for follow-up well stimulation, but can not realize increasing substantially recovery ratio.
Summary of the invention
In order to overcome the deficiency that existing oil recovery technique recovery ratio is low, the present invention provides a kind of method that Multidirectional interlayer displacement in flooding recovers the oil, and improves the recovery ratio produced of recovering the oil.It is a further object of the present invention to provide the system that a kind of Multidirectional interlayer displacement in flooding realizing said method recovers the oil.
The method that Multidirectional interlayer displacement in flooding of the present invention recovers the oil, oil reservoir trap structure, oil-layer distribution and core intersection is grasped according to oil exploration technology, water injection well and collecting well group is arranged in oil reservoir circle, multi-faceted toward oil-bearing stratum flooding by water injection well, the displacement of reservoir oil at collecting well group, utilizes the oil of collecting well group extraction oil reservoir.The displacement of reservoir oil is the same layer position displacement of reservoir oil, and between oil reservoir, the water injection rate of water filling is 10～30 times (weight ratios) of oil production, and the temperature of water filling is 60～70 DEG C.
The system that Multidirectional interlayer displacement in flooding of the present invention recovers the oil, including water injection well and collecting well group, collecting well group is made up of 2～20 mouthfuls of producing wells.According to the regularity of distribution of oil reservoir, 1～10 layer of water filling circle is set.Water injection well is arranged on every layer of water filling circle, and collecting well group is arranged between center and/or two water filling circles of water filling circle；On every layer of water filling circle, between the quantity of water injection well, the center of water filling circle and/or two water filling circles, the quantity of collecting well group determines according to the size of oil-producing region oil pool distribution.
Producing well includes multilateral well and oil recovery horizontal well, and oil recovery horizontal well includes oil recovery straight well section and oil recovery horizontal segment, and multilateral well divides and includes vertical section and 2～6 son fields.The son field of multilateral well is the most straight structure of orientation or horizontal structure.Son field is in the range of same core intersection or between different oil reservoir.The son field of multilateral well fills gravel, on the one hand prevents because Geological Reasons horizontal well caves in, and on the other hand can guarantee that the good permeability space of oil stream.Oil recovery horizontal section length is 0.5～0.8 times of the spacing of two water filling circles, and the oil recovery horizontal well in each collecting well group is arranged in an oil reservoir or is arranged in different oil reservoirs.Oil recovery horizontal segment is positioned at same oil reservoir or multiple oil reservoir, and each oil reservoir is provided with production ports.
Water injection well is horizontal flood well, and horizontal flood well includes water filling straight well section and water filling horizontal segment, and water filling horizontal segment is provided with injection point, and the quantity of injection point determines according to the length of water filling horizontal segment.Horizontal flood well is arranged between single little oil reservoir or 2～5 little oil reservoirs of oil pool outline.Total length is oil-water interfaces girth 1～5 times of every horizontal water injection well of little oil reservoir.
It is on the basis of kinetic model simulated experiment that Multidirectional interlayer displacement in flooding of the present invention recovers the oil, the oil production method improving underground oil recovery factor drawn, this kinetic model is to be recovered the oil by the water injection exploitation method displacement of simulation underground crude oil.Recovered the oil by simulation Multidirectional interlayer displacement in flooding, with the water yield displacement of 10～30 times, recovery ratio is brought up to more than 85%.The hydraulic pressure displacement of reservoir oil and gravity flood is used on the basis of pool description and grasp oil reservoir trap structure, oil-layer distribution and core intersection.The hydraulic pressure displacement of reservoir oil is Multidirectional interlayer water filling, by multiple spot to some displacement of reservoir oils in same layer position.Gravity flood is the difference in height utilizing interlayer, the buoyancy displacement of reservoir oil by oil, i.e. at single substratum or multiple little interlayer of oil reservoir, arranging horizontal flood well around whole oil reservoir, horizontal flood well is at 1～3 times of total length oil-water interfaces to be exceeded girth of each little interlayer.Depending on the size of whole oil reservoir trap, according to the well spacing rule of oil reservoir oil well, if 1～10 layer of water filling circle, between centre and the two-layer water filling circle of water filling circle, arrange producing well.When collecting well group selected by producing well, the geologic requirements arranged according to collecting well group, the depth direction of son field is staggered mutually, uses starlike layout, controls the area in oil recovery region easily.
Compared with prior art, the invention has the beneficial effects as follows by multiple injection points to a some displacement of reservoir oil of recovering the oil, with the oil reservoir displacement of reservoir oil, height according to permeability determines the quantity of injection point, seperated layer water injection displacement, according to the difference of interlayer permeability, determines different water injection pressures, control water filling layer position by mining requirement, improve the recovery ratio of crude oil.
Accompanying drawing explanation
Fig. 1 is the center oil recovery schematic diagram of Multidirectional interlayer displacement in flooding individual layer water filling circle of the present invention；
Fig. 2 is the schematic diagram of another embodiment of the present invention；
Fig. 3 is the schematic diagram of still another embodiment of the present invention；
Fig. 4 is collecting well group structural representation；
Fig. 5 is that oil recovery horizontal well arranges schematic diagram.
Wherein:
1 water injection well, 2 collecting well group, 3 producing wells, 4 ground floor water filling circles, 5 second layer water filling circles, 6 third layer water filling circles, 7 oil recovery straight well sections, 8 oil recovery horizontal segments, 9 gravels, 10 oil reservoirs, 11 vertical sections, 12 son fields, 13 oil recovery horizontal wells, 14 multilateral wells, 15 the 4th layers of water filling circle, 16 water filling circles, 17 water filling straight well sections, 18 water filling horizontal segments, 19 layer 5 water filling circle.
Detailed description of the invention
The present invention is described in detail with embodiment below in conjunction with the accompanying drawings.
Embodiment 1
The system that Multidirectional interlayer displacement in flooding of the present invention recovers the oil is as shown in Figure 1, for little oil reservoir wellblock, arrange that 16,8 mouthfuls of water injection wells of one layer of water filling circle are arranged on water filling circle at oil pool outline, 1 group of collecting well group 2 is arranged in the center of water filling circle, and collecting well group is made up of producing well 3.As shown in Figure 4, producing well includes 1 mouthful of multilateral well 14 and 6 mouthfuls of oil recovery horizontal wells 13, and oil recovery horizontal well includes oil recovery straight well section 7 and oil recovery horizontal segment 8, and multilateral well is divided into vertical section 11 and 4 son fields 12.The son field 12 of multilateral well is the most straight structure of orientation, and son field is between different oil reservoirs.The son field 12 of multilateral well 14 fills gravel 9.Oil recovery horizontal well in each collecting well group is arranged in different oil reservoirs, and the oil recovery horizontal segment 8 of every mouthful of oil recovery horizontal well is positioned at same oil reservoir 10.As it is shown in figure 5, water injection well 1 is horizontal flood well, horizontal flood well includes water filling straight well section 17 and water filling horizontal segment 18, and water filling horizontal segment is provided with injection point, and the quantity of injection point determines according to the length of water filling horizontal segment.Horizontal flood well is arranged between single little oil reservoir or 2 little oil reservoirs of oil pool outline.Total length is oil-water interfaces girth 2 times of every horizontal water injection well of little oil reservoir.
The process that Multidirectional interlayer displacement in flooding of the present invention recovers the oil is, oil reservoir trap structure, oil-layer distribution and core intersection is grasped, multi-faceted toward oil-bearing stratum flooding, the displacement of reservoir oil at collecting well group by water injection well according to oil exploration technology, utilize the oil of collecting well group extraction oil reservoir, with the oil reservoir displacement of reservoir oil.Between oil reservoir, the water injection rate of water filling is 20 times (weight ratios) of oil production, and the temperature of water filling is 65 DEG C.
Embodiment 2
Another embodiment of the present invention, as in figure 2 it is shown, be medium and small oil reservoir, uses three layers of water filling circle 16.At the intermediate arrangement ground floor water filling circle 4 of oil reservoir, ground floor water filling circle is arranged 8 mouthfuls of water injection wells 1.Arrange third layer water filling circle 6 at oil pool outline, the 3rd water filling circle has 6 mouthfuls of water injection wells.Arranging second layer water filling circle 5 between first water filling circle and the 3rd water filling circle, second layer water filling circle is provided with 6 mouthfuls of water injection wells.The center of ground floor water filling circle is provided with one group of collecting well group 2, is provided with 3 groups of collecting well group, is provided with 5 groups of collecting well group 2 between second layer water filling circle and third layer water filling circle between ground floor water filling circle and second layer water filling circle.0.6 times of the spacing of a length of two water filling circles of oil recovery horizontal segment 8.Multidirectional interlayer displacement in flooding oil recovery process is same as in Example 1.
Embodiment 3
A further embodiment of the present invention, as it is shown on figure 3, be big-and-middle-sized oil reservoir oil-producing region, uses five layers of water filling circle 16.At the intermediate arrangement ground floor water filling circle 4 of oil reservoir, ground floor water filling circle is arranged 3 mouthfuls of water injection wells 1.Arrange 6 mouthfuls of water injection wells at second layer water filling circle 5, third layer water filling circle 6 has 8 mouthfuls of water injection wells, the 4th layer of water filling circle 15 arrange that 12 mouthfuls of water injection wells, layer 5 water filling circle 19 are provided with 12 mouthfuls of water injection wells.The center of ground floor water filling circle is provided with 1 group of collecting well group 2,4 groups of collecting well group it are provided with between ground floor water filling circle and second layer water filling circle, 6 groups of collecting well group 2 it are provided with between second layer water filling circle and third layer water filling circle, it is provided with 8 groups of collecting well group 2 between third layer water filling circle and the 4th layer of water filling circle, between the 4th layer of water filling circle and layer 5 water filling circle, is provided with 12 groups of collecting well group 2.
Claims (5)
1. the system that a Multidirectional interlayer displacement in flooding recovers the oil, including water injection well (1) and collecting well group (2), described collecting well group (2) is made up of 2～20 mouthfuls of producing wells (3), it is characterized in that: according to the regularity of distribution of oil reservoir, arrange 1～10 layer of water filling circle (16)；Described water injection well (1) is arranged on every layer of water filling circle, and described collecting well group (2) is arranged between center and/or two water filling circles of water filling circle；On every layer of water filling circle, between the quantity of water injection well, the center of water filling circle and/or two water filling circles, the quantity of collecting well group determines according to the size of oil-producing region oil pool distribution；Described horizontal flood well is arranged between single little oil reservoir (10) or 2～5 little oil reservoirs of oil pool outline, total length is oil-water interfaces girth 1～3 times of every horizontal water injection well of little oil reservoir；Described producing well includes multilateral well (14) and oil recovery horizontal well (13), and described oil recovery horizontal well includes oil recovery straight well section (7) and oil recovery horizontal segment (8), and described multilateral well divides and includes vertical section (11) and 2～6 son fields (12)；The geologic requirements arranged according to collecting well group, the depth direction of son field is staggered mutually, uses starlike layout.
The system that Multidirectional interlayer displacement in flooding the most according to claim 1 recovers the oil, it is characterized in that: the son field (12) of described multilateral well (14) is orientation tiltedly straight structure or horizontal structure, described son field is in the range of same core intersection or between different oil reservoir.
The system that Multidirectional interlayer displacement in flooding the most according to claim 1 recovers the oil, is characterized in that: the son field (12) of described multilateral well (14) fills gravel (9).
The system that Multidirectional interlayer displacement in flooding the most according to claim 1 recovers the oil, it is characterized in that: 0.5～0.8 times of the spacing of described a length of two the water filling circles of oil recovery horizontal segment (8), the oil recovery horizontal well in each collecting well group (2) is arranged in an oil reservoir or is arranged in different oil reservoirs；Oil recovery horizontal segment (8) is positioned at same oil reservoir (10) or multiple oil reservoir, and each oil reservoir is provided with production ports.
The system that Multidirectional interlayer displacement in flooding the most according to claim 1 recovers the oil, it is characterized in that: described water injection well (1) is horizontal flood well, described horizontal flood well includes water filling straight well section (17) and water filling horizontal segment (18), described water filling horizontal segment is provided with injection point, and the quantity of injection point determines according to the length of water filling horizontal segment.
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| CN103835684A (en) * | 2014-03-27 | 2014-06-04 | 西安三才石油工程服务有限公司 | Fine directional arc water injection and oil displacement method |
| CN106907136B (en) * | 2015-12-22 | 2019-08-02 | 中国石油化工股份有限公司 | A method of construction building well |
| CN105672978A (en) * | 2016-03-28 | 2016-06-15 | 中国石油天然气股份有限公司 | Horizontal moving type five-point horizontal well three-dimensional well pattern well spacing method |
| CN113137212A (en) * | 2020-01-17 | 2021-07-20 | 中国石油天然气股份有限公司 | Multi-layer heterogeneous oil reservoir water injection method |
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| US8082995B2 (en) * | 2007-12-10 | 2011-12-27 | Exxonmobil Upstream Research Company | Optimization of untreated oil shale geometry to control subsidence |
| AU2010245127B2 (en) * | 2009-05-05 | 2015-02-05 | Exxonmobil Upstream Research Company | Converting organic matter from a subterranean formation into producible hydrocarbons by controlling production operations based on availability of one or more production resources |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101395338A (en) * | 2005-01-14 | 2009-03-25 | 哈利伯顿能源服务公司 | System and method for producing fluids from a subterranean formation |
| CN1837575A (en) * | 2006-02-24 | 2006-09-27 | 尤尼斯油气技术（中国）有限公司 | Processing technology for extracting oil from metamorphic rock high pour point oil of burial hill by using combustion drive in horizontal well |
| CN101806207A (en) * | 2010-04-26 | 2010-08-18 | 徐萍 | Horizontal well three-dimensional intersection well pattern structure |
| CN103069105A (en) * | 2010-08-30 | 2013-04-24 | 埃克森美孚上游研究公司 | Olefin reduction for in situ pyrolysis oil generation |
| CN102146789A (en) * | 2011-03-30 | 2011-08-10 | 中国石油化工股份有限公司 | Deep profile controlling method |
| CN102364041A (en) * | 2011-10-26 | 2012-02-29 | 王胜存 | Oil extraction method for establishing oil permeable water stop sieve by filling fusheng sand in horizontal well fracture |
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Inventor after: Yan Hao Inventor after: Zhao Yifan Inventor after: Li Yunfeng Inventor after: Xian Meng Yuan Inventor before: Yan Hao Inventor before: Li Yunfeng Inventor before: Xian Meng Yuan |
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