CN103628848A - Multidirectional interlayer water flooding displacement oil extraction method and system - Google Patents
Multidirectional interlayer water flooding displacement oil extraction method and system Download PDFInfo
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- CN103628848A CN103628848A CN201310629331.7A CN201310629331A CN103628848A CN 103628848 A CN103628848 A CN 103628848A CN 201310629331 A CN201310629331 A CN 201310629331A CN 103628848 A CN103628848 A CN 103628848A
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Abstract
The invention relates to a multidirectional interlayer water flooding displacement oil extraction method and system. The system comprises water injection wells and cluster well sets. Each cluster well is composed of 2-20 producing wells. According to the oil reservoir distribution rules, 1-10 layers of water injection circles are arranged. The water injection wells are arranged on the water injection circles respectively. The cluster well sets are arranged at the centers of the water injection circles or between every two water injection circles. The number of the water injection wells in each layer of water injection circle and the number of the cluster well sets at the centers of the water injection circles and/or between every two water injection circles are determined according to the distribution of oil reservoir in an oil producing region. A trap structure of the oil reservoir, the distribution of oil layers and the thicknesses of the oil layers are known according to the oil exploration technology. Water is injected into the oil layers through the water injection wells in a multidirectional mode. Oil displacement is performed towards the cluster well sets. Oil is extracted through the cluster well sets. The oil displacement is oil displacement in the same layer. The water injection rate of the oil layers is 10-30 times the oil production. The temperature of the injected water is raised to 60-70 DEG C by using ground source heat pumps. According to the method and system, the oil displacement is carried out on one oil extraction point through a plurality of water injection points, and the recovery ratio of crude oil is improved.
Description
Technical field
The invention belongs to technical field of petroleum extraction, relate to the method and system that a kind of multi-faceted interlayer displacement in flooding recovers the oil.
Background technology
The initial stage of oil extraction is only to rely on natural energy crude oil extraction, is generally commonly called as primary oil recovery, and its recovery ratio is generally no more than 15%.After oil extraction certain phase, because stratum energy space is in debt, need to make up with water filling or gas injection the volume in debt of extraction.The method of supplementing stratum energy and exploiting oil field is called secondary oil recovery, and its recovery ratio is generally no more than 50%.By the oil production method that injects work agent to stratum or introduce other energy, be called tertiary oil recovery, also referred to as EOR method.But after water flooding recovery process and the exploitation of EOR method, the advanced level in the world is 65%～70% at present.Therefore it is underground that, existing production technique causes a large amount of petroleum resources delays.According to statistics, the every raising 1% of recovery ratio, the whole nation will increase by 1.5 hundred million tons of oil production rates.
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; At first well, utilize conventional drilling technology to bore water filling branch, the oil reservoir under water layer and water layer passes through in water filling branch; Water filling branch is lowered to slot pipe trench water flowing layer and oil reservoir after boring; Because aquifer pressure is high, formation pressure is low, and the water of water layer flow into oil reservoir automatically, is oil reservoir makeup energy; After water filling branch slot pipe is lowered to, cementing plug shutoff branch and the first well binding site; Adopt second mouthful of well to recover the oil to oil reservoir; At first well, utilize conventional drilling technology to bore the first oil recovery branch and the second oil recovery branch, realize 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, for follow-up well stimulation is provided convenience, but can not realize, increases substantially recovery ratio.
Summary of the invention
In order to overcome the low deficiency of existing oil recovery technique recovery ratio, the invention provides a kind of method that multi-faceted interlayer displacement in flooding recovers the oil, improve the recovery ratio of recovering the oil and producing.Another object of the present invention is to provide the system that a kind of multi-faceted interlayer displacement in flooding of realizing said method recovers the oil.
The method that the multi-faceted interlayer displacement in flooding of the present invention recovers the oil, according to oil exploration technology, grasp oil reservoir trap structure, oil reservoir distribution and core intersection, in oil reservoir circle, arrange water injection well and cluster well group, multi-faceted toward oil-bearing stratum flooding by water injection well, to the place's displacement of reservoir oil of cluster well group, utilize the oil of cluster well group extraction oil reservoir.The displacement of reservoir oil is with the layer position displacement of reservoir oil, 10～30 times (weight ratios) that between oil reservoir, the water injection rate of water filling is oil production, and the temperature of water filling is 60～70 ℃.
The system that the multi-faceted interlayer displacement in flooding of the present invention recovers the oil, comprises water injection well and cluster well group, and cluster well group is comprised 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 cluster well group is arranged between water filling Quan center and/or two water filling circles; The size that on every layer of water filling circle, between the quantity of water injection well, water filling Quan center and/or two water filling circles, the quantity of cluster well group distributes according to oil-producing region oil reservoir is determined.
Producing well comprises multilateral well and oil recovery horizontal well, and oil recovery horizontal well comprises oil recovery straight well section and oil recovery horizontal segment, and multilateral well divides and comprises vertical section and 2～6 son fields.The son field of multilateral well is directed tiltedly straight structure or horizontal structure.Son field is within the scope of same core intersection or between different oil reservoirs.The son field of multilateral well is filled gravel, prevents because Geological Reasons horizontal well caves on the one hand, can guarantee on the other hand the good oil impregnate space of oil stream.Oil recovery horizontal section length is 0.5～0.8 times of distance between two water filling circles, and the oil recovery horizontal well in each cluster 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 a plurality of oil reservoir, and each oil reservoir is provided with production ports.
Water injection well is horizontal flood well, and horizontal flood well comprises 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 is determined according to the length of water filling horizontal segment.Horizontal flood well is arranged between the single little oil reservoir or 2～5 little oil reservoirs of oil pool outline.The total length of the horizontal water injection well of every little oil reservoir is 1～5 times of oil-water interfaces girth.
It is on the basis of kinetic model simulated experiment that the multi-faceted interlayer displacement in flooding of the present invention recovers the oil, the oil production method of the underground oil recovery factor of raising drawing, and this kinetic model is to recover the oil by the water flooding recovery method displacement of simulate formation crude oil.By simulating multi-faceted interlayer displacement in flooding, recover the oil, with the water yield displacement of 10～30 times, recovery ratio is brought up to more than 85%.On the basis of pool description and the trap structure of grasp oil reservoir, oil reservoir distribution and core intersection, adopt the hydraulic pressure displacement of reservoir oil and gravity flood.The hydraulic pressure displacement of reservoir oil is multi-faceted interlayer water filling, by multiple spot to some displacement of reservoir oils in layer position.Gravity flood is the difference in height of utilizing interlayer, by the oily buoyancy displacement of reservoir oil, between the single substratum or a plurality of substratum of oil reservoir, around whole oil reservoir, arrange horizontal flood well, the total length of horizontal flood well between each substratum will exceed 1～3 times of oil-water interfaces girth.Depending on the size of whole oil reservoir trap, according to the well spacing rule of oil reservoir oil well, establish 1～10 layer of water filling circle, between the centre of water filling circle and two-layer water filling circle, arrange producing well.When producing well is selected cluster well group, the geologic requirements of arranging according to cluster well group, the depth direction of son field staggers mutually, adopts starlike layout, controls easily the area in oil recovery region.
Compared with prior art, the invention has the beneficial effects as follows by a plurality of injection points to the some displacement of reservoir oil of recovering the oil, with the oil reservoir displacement of reservoir oil, according to the height of permeability, determine the quantity of injection point, seperated layer water injection displacement, according to the difference of interlayer permeability, determines different water injection pressures, by mining requirement, control water filling layer position, improved the recovery ratio of crude oil.
Accompanying drawing explanation
Fig. 1 is the multi-faceted interlayer displacement in flooding of the present invention individual layer water filling Quan center oil recovery schematic diagram;
Fig. 2 is the schematic diagram of another embodiment of the present invention;
Fig. 3 is the present invention's schematic diagram of an embodiment again;
Fig. 4 is cluster well group structural representation;
Fig. 5 is that oil recovery horizontal well is arranged schematic diagram.
Wherein:
1-water injection well, 2-cluster well group, 3-producing well, 4-first floor water filling circle, 5-second layer water filling circle, 6-the three layer of water filling circle, 7-oil recovery straight well section, 8-oil recovery horizontal segment, 9-gravel, 10-oil reservoir, 11-vertical section, 12-son field, 13-oil recovery horizontal well, 14-multilateral well, 15-the four layer of water filling circle, 16-water filling circle, 17-water filling straight well section, 18-water filling horizontal segment, 19-layer 5 water filling circle.
The specific embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
The system that the multi-faceted interlayer displacement in flooding of the present invention recovers the oil as shown in Figure 1, for little oil reservoir wellblock, at oil pool outline, arrange that 16,8 mouthfuls of water injection wells of one deck water filling circle are arranged on water filling circle, 1 group of cluster well group 2 is arranged in water filling Quan center, and cluster well group is comprised of producing well 3.As shown in Figure 4, producing well comprises 1 mouthful of multilateral well 14 and 6 mouthfuls of oil recovery horizontal wells 13, and oil recovery horizontal well comprises 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 directed tiltedly straight structure, and son field is between different oil reservoirs.The son field 12 of multilateral well 14 is filled gravel 9.Oil recovery horizontal well in each cluster 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 shown in Figure 5, water injection well 1 is horizontal flood well, and horizontal flood well comprises 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 is determined according to the length of water filling horizontal segment.Horizontal flood well is arranged between the single little oil reservoir or 2 little oil reservoirs of oil pool outline.The total length of the horizontal water injection well of every little oil reservoir is 2 times of oil-water interfaces girth.
The process that the multi-faceted interlayer displacement in flooding of the present invention recovers the oil is, according to oil exploration technology, grasp oil reservoir trap structure, oil reservoir distribution and core intersection, multi-faceted toward oil-bearing stratum flooding, to the place's displacement of reservoir oil of cluster well group by water injection well, utilize the oil of cluster well group extraction oil reservoir, with the oil reservoir displacement of reservoir oil.20 times (weight ratios) that between oil reservoir, the water injection rate of water filling is oil production, the temperature of water filling is 65 ℃.
Another embodiment of the present invention as shown in Figure 2, is medium and small oil reservoir, adopts three layers of water filling circle 16.At the intermediate arrangement first floor water filling circle 4 of oil reservoir, on first floor water filling circle, arrange 8 mouthfuls of water injection wells 1.At oil pool outline, arrange on the 3rd layer of water filling circle 6, the three water filling circle have 6 mouthfuls of water injection wells.Between the first water filling circle and the 3rd water filling circle, arrange second layer water filling circle 5, second layer water filling circle is provided with 6 mouthfuls of water injection wells.First floor water filling Quan center is provided with one group of cluster well group 2, between first floor water filling circle and second layer water filling circle, is provided with 3 groups of cluster well groups, between second layer water filling circle and the 3rd layer of water filling circle, is provided with 5 groups of cluster well groups 2.The length of oil recovery horizontal segment 8 is 0.6 times of distance between two water filling circles.Multi-faceted interlayer displacement in flooding oil recovery process is identical with embodiment 1.
A present invention again embodiment as shown in Figure 3, is big-and-middle-sized oil reservoir oil-producing region, adopts five layers of water filling circle 16.At the intermediate arrangement first floor water filling circle 4 of oil reservoir, on first floor water filling circle, arrange 3 mouthfuls of water injection wells 1.At second layer water filling circle 5, arrange 6 mouthfuls of water injection wells, on the 3rd layer of water filling circle 6, have 8 mouthfuls of water injection wells, the 4th layer of water filling circle 15 arranged 12 mouthfuls of water injection wells, and layer 5 water filling circle 19 is provided with 12 mouthfuls of water injection wells.First floor water filling Quan center is provided with 1 group of cluster well group 2, between first floor water filling circle and second layer water filling circle, be provided with 4 groups of cluster well groups, between second layer water filling circle and the 3rd layer of water filling circle, be provided with 6 groups of cluster well groups 2, between the 3rd layer of water filling circle and the 4th layer of water filling circle, be provided with between 2, the four layers of water filling circle of 8 groups of cluster well groups and layer 5 water filling circle and be provided with 12 groups of cluster well groups 2.
Claims (8)
1. the method that multi-faceted interlayer displacement in flooding recovers the oil, according to oil exploration technology, grasp oil reservoir trap structure, oil reservoir distribution and core intersection, it is characterized in that: in oil reservoir circle, arrange water injection well (1) and cluster well group (2), multi-faceted toward oil-bearing stratum flooding by water injection well, to the place's displacement of reservoir oil of cluster well group, utilize the oil of cluster well group extraction oil reservoir; The described displacement of reservoir oil is that 10～30 times (weight ratios) that between described oil reservoir, the water injection rate of water filling is oil production, bring up to 60～70 ℃ by earth source heat pump by the temperature of water filling with the layer position displacement of reservoir oil.
2. the system that multi-faceted interlayer displacement in flooding recovers the oil, comprise water injection well (1) and cluster well group (2), described cluster well group (2) is comprised of 2～20 mouthfuls of producing wells (3), it is characterized in that: according to the regularity of distribution of oil reservoir, 1～10 layer of water filling circle (16) is set; Described water injection well (1) is arranged on every layer of water filling circle, and described cluster well group (2) is arranged between water filling Quan center and/or two water filling circles; The size that on every layer of water filling circle, between the quantity of water injection well, water filling Quan center and/or two water filling circles, the quantity of cluster well group distributes according to oil-producing region oil reservoir is determined.
3. the system that multi-faceted interlayer displacement in flooding according to claim 2 recovers the oil, it is characterized in that: described producing well comprises multilateral well (14) and oil recovery horizontal well (13), described oil recovery horizontal well comprises oil recovery straight well section (7) and oil recovery horizontal segment (8), and described multilateral well divides and comprises vertical section (11) and 2～6 son fields (12).
4. the system that multi-faceted interlayer displacement in flooding according to claim 3 recovers the oil, it is characterized in that: the son field (12) of described multilateral well (14) is directed tiltedly straight structure or horizontal structure, and described son field is within the scope of same core intersection or between different oil reservoirs.
5. the system that multi-faceted interlayer displacement in flooding according to claim 3 recovers the oil, is characterized in that: the son field (12) of described multilateral well (14) is filled gravel (9).
6. the system that multi-faceted interlayer displacement in flooding according to claim 3 recovers the oil, it is characterized in that: described oil recovery horizontal segment (8) length is 0.5～0.8 times of distance between two water filling circles, and the oil recovery horizontal well in each cluster 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 a plurality of oil reservoir, and each oil reservoir is provided with production ports.
7. the system that multi-faceted interlayer displacement in flooding according to claim 2 recovers the oil, it is characterized in that: described water injection well (1) is horizontal flood well, described horizontal flood well comprises 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 is determined according to the length of water filling horizontal segment.
8. the system that multi-faceted interlayer displacement in flooding according to claim 2 recovers the oil, it is characterized in that: described horizontal flood well is arranged between the single little oil reservoir (10) or 2～5 little oil reservoirs of oil pool outline, and the total length of the horizontal water injection well of every little oil reservoir is 1～3 times of oil-water interfaces girth.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105672978A (en) * | 2016-03-28 | 2016-06-15 | 中国石油天然气股份有限公司 | Horizontal displacement type five-point horizontal well three-dimensional well pattern distributing method |
| CN106907136A (en) * | 2015-12-22 | 2017-06-30 | 中国石油化工股份有限公司 | A kind of method of construction building well |
| 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 |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| US20090145598A1 (en) * | 2007-12-10 | 2009-06-11 | Symington William A | Optimization of untreated oil shale geometry to control subsidence |
| CN101806207A (en) * | 2010-04-26 | 2010-08-18 | 徐萍 | Horizontal well three-dimensional intersection well pattern structure |
| US20100282460A1 (en) * | 2009-05-05 | 2010-11-11 | Stone Matthew T | Converting Organic Matter From A Subterranean Formation Into Producible Hydrocarbons By Controlling Production Operations Based On Availability Of One Or More Production Resources |
| 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 |
| 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 |
-
2013
- 2013-12-02 CN CN201310629331.7A patent/CN103628848B/en not_active Expired - Fee Related
Patent Citations (8)
| 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 |
| US20090145598A1 (en) * | 2007-12-10 | 2009-06-11 | Symington William A | Optimization of untreated oil shale geometry to control subsidence |
| US20100282460A1 (en) * | 2009-05-05 | 2010-11-11 | Stone Matthew T | Converting Organic Matter From A Subterranean Formation Into Producible Hydrocarbons By Controlling Production Operations Based On Availability Of One Or More Production Resources |
| 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 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106907136A (en) * | 2015-12-22 | 2017-06-30 | 中国石油化工股份有限公司 | A kind of method of construction building well |
| 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 displacement type five-point horizontal well three-dimensional well pattern distributing 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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