CN104895541A - Method for breaking interlayer in oil layer during double-horizontal-well SAGD exploitation - Google Patents
Method for breaking interlayer in oil layer during double-horizontal-well SAGD exploitation Download PDFInfo
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- 239000011229 interlayer Substances 0.000 title claims abstract description 98
- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000010796 Steam-assisted gravity drainage Methods 0.000 title claims abstract description 35
- 239000010410 layer Substances 0.000 title abstract description 6
- 239000003921 oil Substances 0.000 claims abstract description 83
- 238000010793 Steam injection (oil industry) Methods 0.000 claims abstract description 76
- 239000010779 crude oil Substances 0.000 claims abstract description 19
- 230000009977 dual effect Effects 0.000 claims description 31
- 239000007921 spray Substances 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 9
- 238000009412 basement excavation Methods 0.000 claims description 8
- 238000011084 recovery Methods 0.000 claims description 6
- 235000020681 well water Nutrition 0.000 claims description 6
- 239000002349 well water Substances 0.000 claims description 6
- 238000005553 drilling Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 238000011161 development Methods 0.000 abstract description 5
- 238000000605 extraction Methods 0.000 abstract description 2
- 239000011435 rock Substances 0.000 description 6
- 230000001186 cumulative effect Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000035699 permeability Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
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- 239000003027 oil sand Substances 0.000 description 1
- 238000005325 percolation Methods 0.000 description 1
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- 238000010008 shearing Methods 0.000 description 1
- -1 steam Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention provides a method for breaking an interlayer between oil layers in double horizontal wells SAGD (steam assisted gravity drainage) exploitation, which comprises the steps of excavating a tunnel in an oil extraction area of a steam injection well and a production well, wherein the tunnel transversely extends towards the direction extending towards the horizontal section of the steam injection well, the tunnel longitudinally penetrates through the interlayer to communicate the oil layers on two sides of the interlayer, a diversion medium is filled in the tunnel to form a flow passage for steam and crude oil to flow through, steam is injected into the steam injection well, the steam is conveyed into the oil layer above the interlayer through the flow passage, thick oil above the interlayer is heated and reduced in viscosity, and the reduced crude oil enters the production well through the flow passage to be extracted from the production well. The invention can communicate oil layers on the upper side and the lower side of the interlayer, effectively convey steam and crude oil from one side of the interlayer to the other side of the interlayer, ensure the balanced development of a steam cavity in the horizontal direction and the vertical direction, fully exert the advantages of a horizontal well and have low cost.
Description
Technical field
The present invention relates to the method that dual horizontal well SAGD exploits, particularly relate to during a kind of dual horizontal well SAGD exploits the method broken through every interlayer in oil reservoir.
Background technology
The stock number of whole world super-viscous oil is huge; as the cutting edge technology developing viscous crude in the world; SAGD (Steam-Assisted Gravity Drainage; i.e. SAGD) in Canadian oil-sand exploitation, occupy the principal status of public economy, China Liaohe River, Xinjiang Oilfield have also been obtained scale application.The method be utilize horizontal well, steam carrys out the resource such as heavy crude producing, super-viscous oil effectively.By injecting high mass dryness fraction water vapour continuously to horizontal steam injection well, steam covers release vaporization latent heat reservoir, declined to a great extent by the Viscosity of Heavy Crude Oil heated and and steam condensate let out down under gravity, finally from the horizontal well output bottom oil reservoir.Because reservoir fluid is constantly plucked out of, steam is expanded along the vertical and horizontal directions, forms the vapor chamber of constantly growing.Relative to other heavy oil development technology, the method has high gas oil ratio and recovery ratio.
Every the one of the main reasons that interlayer is formation reservoir heterogeneity, its existence has had a strong impact on SAGD production.Spread compared with large every interlayer usually little by degree of porosity, that permeability is low, degree of consolidation is high mud stone form, the fluid such as steam, crude oil passes through without seepage flow, slowly can only stream, greatly limit the vertical speed expanding to top of vapor chamber, thus be called as the baffle plate that vapor chamber is grown.The thing mould research of growing between injection-production well every interlayer confirms: short very little every interlayer impact between well, longlyer can reduce produce oil speed every interlayer, and (grow in injection-production well middle every interlayer) in not connection situation completely, will cause top crude oil cannot extraction every interlayer.And the numerical simulation study that the aboveground side of steam injection grows every interlayer is shown, larger every interlayer spread, from steam injection well more close to, permeability lower SAGD is developed more unfavorable.On the whole, cause that upper product is slow every interlayer, cumulative oil production and gas oil ratio on the low side, need to carry out the research work broken through targetedly every interlayer.
Common breakthrough can be divided into two large classes every sandwich technique, one class relies on rock mechanics method, shearing or tensile failure original position break rock, in this case narrow and small crack can be formed, under ground stress environment, its percolation ability is more weak, need the aquation of long period, creep and fluid erosion effect and form effective seepage channel, and in fact these class methods need high pressure and high temperature, operation with high pressure this will improve steam-front pressure, reduce every interlayer rock effective stress, thus reduce its intensity, for shear fails provides possibility.And high-temperature operation likely causes and presses liter every interlayer rock interior hole, mudstone foundation is caused to shrink, so there is tensile failure (class fracturing); Another kind of is that direct part physical removal is every interlayer rock, set up and highly ooze flow-guiding channel, these class methods do not need HTHP, only need certain technical matters, but the drawback of this type of technology existing is: be difficult to positioningly descend interlayer, thus cost high, have a big risk.
Summary of the invention
The object of this invention is to provide during a kind of dual horizontal well SAGD exploits the method broken through every interlayer in oil reservoir, steam effectively can be transported to every interlayer opposite side by every interlayer side, and cost is low.
For achieving the above object, the present invention proposes a kind of method broken through during dual horizontal well SAGD exploits every interlayer in oil reservoir, described dual horizontal well comprises steam injection well and producing well, described steam injection well comprises steam injection well horizontal segment and the vertical section of steam injection well, described producing well comprises producing well horizontal segment and the vertical section of producing well, the described steam injection well water section of putting down to be positioned at above described producing well horizontal segment and parallel with described producing well horizontal segment, be positioned at above described steam injection well horizontal segment every interlayer, wherein, the method every interlayer in described breakthrough oil reservoir comprises the following steps:
Steps A: excavate tunnel in the oil recovery region of described steam injection well and described producing well, described tunnel extends in the direction laterally extended towards described steam injection well horizontal segment, and described tunnel makes the described oil reservoir every interlayer both sides be connected every interlayer longitudinally running through described;
Step B: fill permeable medium in described tunnel, makes to form the circulation passage flow through for steam and crude oil in described tunnel.
Dual horizontal well SAGD as above breaks through the method every interlayer in oil reservoir in exploiting, wherein, the method every interlayer in described breakthrough oil reservoir is further comprising the steps of:
Step C: fill permeable medium in described tunnel after, steam is injected to described steam injection well, steam is delivered to described in the oil reservoir above interlayer via described circulation passage, viscous crude described in making above interlayer is heated, it is glutinous to fall, and the crude oil fallen after sticking enters in described producing well via described circulation passage;
Step D: recover the oil from described producing well.
Dual horizontal well SAGD as above breaks through the method every interlayer in oil reservoir in exploiting, wherein, described steam injection well and described producing well are all arranged in the first perpendicular, along described first perpendicular excavation tunnel, described steam injection well water well section and described producing well horizontal segment is made all to be positioned at described tunnel.
Dual horizontal well SAGD as above breaks through the method every interlayer in oil reservoir in exploiting, wherein, described producing well is arranged in the first perpendicular, described steam injection well is arranged in the second perpendicular, described first perpendicular parallels with described second perpendicular and separately, along described first perpendicular excavation tunnel, make described producing well horizontal segment be positioned at described tunnel, the described steam injection well water section of putting down is positioned at outside described tunnel.
Dual horizontal well SAGD as above breaks through the method every interlayer in oil reservoir in exploiting, wherein, described steam injection well and described producing well are all arranged in the second perpendicular, first perpendicular parallels with described second perpendicular and separately, along described first perpendicular excavation tunnel, described steam injection well horizontal segment and described producing well horizontal segment are all positioned at outside described tunnel.
Dual horizontal well SAGD as above breaks through the method every interlayer in oil reservoir in exploiting, wherein, described permeable medium is gravel.
Dual horizontal well SAGD as above breaks through the method every interlayer in oil reservoir in exploiting, wherein, the length in described tunnel equals the length of described steam injection well horizontal segment, and the width in described tunnel equals the borehole diameter of described steam injection well, and the height in described tunnel equals core intersection.
Dual horizontal well SAGD described above breaks through the method every interlayer in oil reservoir in exploiting, wherein, the method every interlayer in described breakthrough oil reservoir comprises following concrete steps:
Step S1: horizontal well drilling eye;
Step S2: under enter sap excavating instrument, described sap excavating instrument comprises slotting function module and slotted platform, and described slotting function module comprises the high-pressure spray boring device and coiled tubing that are connected;
Step S3: fluting, described high-pressure spray boring device is made to be crept into by the top of the lower direction oil reservoir of oil reservoir and pass described every interlayer, the continuous inject high pressure fluid of described high-pressure spray boring device, landwaste returns to ground by described coiled tubing, when described high-pressure spray boring device creeps into top of oil horizon, described slotting function module is recalled bottom oil reservoir;
Step S4: described slotted platform of sliding along the direction that steam injection well horizontal segment extends;
Step S5: repeat step S3 to step S4, until described slotted platform arrives the end of steam injection well horizontal segment, sap excavating terminates;
Step S6: fill permeable medium in tunnel;
Step S7: inject steam in steam injection well, steam is delivered to described in the oil reservoir above interlayer via tunnel, the viscous crude described in making above interlayer is heated, it is glutinous to fall, and through being entered in described producing well by described tunnel after viscous crude falls and sticks, is recovered the oil by producing well.
Dual horizontal well SAGD of the present invention breaks through in oil reservoir in exploiting:
1, the present invention adopts the method excavating tunnel in the oil recovery region of dual horizontal well to break through every interlayer, tunnel extends towards the direction that dual horizontal well horizontal segment extends in transverse direction (length direction), longitudinally running through every interlayer, be communicated with to make the oil reservoir every the upper and lower both sides of interlayer, steam and crude oil can be transported to the opposite side every interlayer by the side every interlayer by tunnel, ensure that vapor chamber is grown with equilibrium on vertical direction in the horizontal direction, give full play to the advantage of horizontal well, cost is low.
2, adopt method of the present invention, the steam injection initial stage gets final product quick produce oil, sets up thermal communication and is communicated with fluid, significantly can reduce and even skip warm-up phase without the need to long-time cyclic preheat; Owing to being provided with tunnel, injection-production well spacing can be strengthened, improve cumulative gas-oil ratio.
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 is the schematic diagram of dual horizontal well;
Fig. 2 is the schematic diagram of first embodiment of the present invention;
Fig. 3 is the schematic diagram of second embodiment of the present invention;
Fig. 4 is the schematic diagram of the 3rd embodiment of the present invention.
Critical element label declaration:
1 steam injection well horizontal segment 2 producing well horizontal segment 3 tunnel
4 permeable mediums 5 are every interlayer 6 oil reservoir
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, hollow arrow in figure represents the flow direction of steam, and filled arrows (or black arrow) represents the flow direction of crude oil.
As shown in Figure 1, dual horizontal well comprises steam injection well and producing well, steam injection well comprises steam injection well horizontal segment 1 and the vertical section of steam injection well, producing well comprises producing well horizontal segment 2 and the vertical section of producing well, steam injection well horizontal segment 1 to be positioned at above producing well horizontal segment 2 and parallel with producing well horizontal segment 2, when SAGD produces, by injecting high-quality steam continuously to steam injection well, steam covers heating oil reservoir, declined by the Viscosity of Heavy Crude Oil that heats and and steam condensate let out down under gravity, enter in producing well and be plucked out of, but owing to containing every interlayer 3 in oil reservoir, such as to be positioned at above steam injection well horizontal segment 1 and every the open and flat cloth of intermediate water every interlayer, especially when when interlayer 3 spread is larger, steam can be caused, the fluids such as crude oil cannot pass through by seepage flow, greatly limit the speed of vapor chamber extends perpendicular to top, for breaking through every interlayer 3, the present invention proposes a kind of method broken through during dual horizontal well SAGD exploits every interlayer in oil reservoir, comprise the following steps:
Steps A: (in other words in the oil reservoir at steam injection well and producing well place) excavation tunnel 3 in the oil recovery region of steam injection well and producing well, tunnel 3 extends towards the direction that steam injection well horizontal segment 1 (or producing well horizontal segment 2) extends at horizontal (i.e. length direction), tunnel 3 runs through in longitudinal (i.e. short transverse) to be made to be connected every the oil reservoir 6 of interlayer 5 both sides every interlayer 5, the length direction in tunnel 3 is the direction that steam injection well horizontal segment (or producing well horizontal segment) extends in other words, the short transverse in tunnel 3 be with every the vertical direction of interlayer;
Step B: fill permeable medium 4 in tunnel 3, make to form the circulation passage flow through for steam and crude oil in tunnel 3, in addition, permeable medium 4 is also played a supporting role to tunnel 3.
By excavation tunnel break through in oil reservoir every interlayer, make steam and crude oil pass through every interlayer by circulation passage, with by the viscous crude extraction above interlayer, efficiency is high.
Further, the method every interlayer in breakthrough oil reservoir of the present invention is further comprising the steps of:
Step C: fill permeable medium 4 in tunnel 3 after, steam is injected in steam injection well, steam is delivered in the oil reservoir above interlayer 5 via the circulation passage in tunnel 3, form the secondary development of vapor chamber, viscous crude above interlayer 5 is heated, fall glutinous, fall the glutinous rear crude oil formed to be input to below interlayer 5 via circulation passage, enter in producing well; And the oil reservoir be positioned at below interlayer, due to not by every the restriction of interlayer, can by after the steam direct heating below interlayer, under let out and enter in producing well;
Step D: recover the oil from producing well.
As shown in Figure 2, for first specific embodiment of the present invention, show the first placement scheme of tunnel and dual horizontal well, Fig. 2 is the vertical section figure of oil reservoir, steam injection well and producing well are all arranged in the first perpendicular, steam injection well horizontal segment 1 is positioned at directly over producing well horizontal segment 2, the aboveground side of steam injection is positioned at every interlayer 5, along the first perpendicular excavation tunnel 3, steam injection well water well section 1 and producing well horizontal segment 2 is made all to be positioned at tunnel 3, namely tunnel 3 is simultaneously through steam injection well horizontal segment and producing well horizontal segment, and run through every interlayer 5, the steam injected by steam injection well can quickly through tunnel 3, be transported to above interlayer 5, form the secondary development of vapor chamber, make the vertical growth of vapor chamber not by affecting every interlayer 5, let out under the crude oil above interlayer 5 is also quick by tunnel 3, enter in producing well.The permeable medium 4 of filling in tunnel 3 can support steam injection well and producing well, and ensures that steam injection well horizontal segment 1 is parallel with producing well horizontal segment 2.
In the present invention, the spacing between steam injection well and producing well can be greater than 5 meters, and concrete spacing is depending on permeable medium and development technology, and the well spacing between existing common steam injection well and producing well is 5 meters.
As shown in Figure 3, for second specific embodiment of the present invention, show the second placement scheme of tunnel and dual horizontal well, Fig. 3 is also the vertical section figure of oil reservoir, producing well is arranged in the first perpendicular, steam injection well is arranged in the second perpendicular, namely two wells are not in same perpendicular, steam injection well horizontal segment 1 is positioned at producing well horizontal segment 2 oblique upper, first perpendicular parallels with the second perpendicular and separately, the aboveground side of steam injection is positioned at every interlayer 5, along the first perpendicular excavation tunnel 3, producing well horizontal segment 2 is made to be positioned at tunnel 3, steam injection well horizontal segment 1 is positioned at outside tunnel 3, namely tunnel 3 is through producing well, not through steam injection well, and run through every interlayer 5, the same steam injected by steam injection well can be transported to above interlayer 5 via tunnel 3 fast, every the crude oil above interlayer 5 also can via tunnel 3 fast under let out and enter in producing well.
In the present embodiment, the horizontal range between tunnel 3 and steam injection well horizontal segment 1 is preferably 0 ~ 2m.
As shown in Figure 4, for the 3rd specific embodiment of the present invention, show the third placement scheme of tunnel and dual horizontal well, Fig. 4 is also the vertical section figure of oil reservoir, steam injection well and producing well are all arranged in the second perpendicular, steam injection well horizontal segment 1 is positioned at directly over producing well horizontal segment 2, second perpendicular parallels with the first perpendicular and separately, the aboveground side of steam injection is positioned at every interlayer 5, along the first perpendicular excavation tunnel, steam injection well horizontal segment 1 and producing well horizontal segment 2 is made all to be positioned at outside tunnel 3, namely tunnel 3 is not all through steam injection well and producing well, tunnel runs through every interlayer 5, same steam and crude oil are all crossed every interlayer 5 by tunnel 3 fast, the steam injected by steam injection well can be transported to above interlayer 5 via tunnel 3 fast, every the crude oil above interlayer 5 also can via tunnel 3 fast under let out and enter in producing well.
In the present embodiment, tunnel 3 is preferably 0 ~ 1m with the horizontal range of steam injection well horizontal segment 1 (or producing well horizontal segment 2).
In a feasible technical scheme, permeable medium 4 is gravel, and gravel has high flow conductivity and larger permeability, can for steam and crude oil quickly through, gravel also has higher bearing strength, can circulation passage in firm support tunnel.
Preferably, the length in tunnel 3 equals the length of steam injection well horizontal segment 1 (or producing well horizontal segment 2), the width in tunnel 3 equals the borehole diameter of steam injection well (or producing well), the height in tunnel 3 equals the thickness of the exploitation oil reservoir in oil recovery region, tunnel 3 is highly greater than the vertical distance between interlayer 5 and producing well horizontal segment 2 in other words, to improve production efficiency and tar productivity further.
In a specific embodiment, dual horizontal well SAGD of the present invention breaks through in oil reservoir in exploiting and comprises following concrete steps every the method for interlayer:
Step S1: horizontal well drilling eye (i.e. steam injection well well and producing well well);
Step S2: under enter sap excavating instrument, sap excavating instrument comprise slotting function module and can along horizontal hole slide slotted platform, slotting function module comprises the high-pressure spray boring device and coiled tubing that are connected;
Step S3: fluting, high-pressure spray boring device is made to be crept into by the top of the lower direction oil reservoir of oil reservoir and be passed every interlayer, the continuous inject high pressure fluid of high-pressure spray boring device, landwaste returns to ground by coiled tubing, when high-pressure spray boring device creeps into top of oil horizon, slotting function module is recalled bottom oil reservoir;
Step S4: the direction slip slotted platform extended along steam injection well horizontal segment (or producing well horizontal segment);
Step S5: repeat step S3 to step S4, until slotted platform arrives the end of steam injection well horizontal segment (or producing well horizontal segment), sap excavating terminates;
Step S6: fill permeable medium in tunnel;
Step S7: inject steam in steam injection well, steam is delivered to described in the oil reservoir above interlayer via tunnel, the viscous crude described in making above interlayer is heated, it is glutinous to fall, and through being entered in described producing well by described tunnel after viscous crude falls and sticks, is recovered the oil by producing well.Owing to being provided with tunnel, the crude oil above interlayer 5 also can be plucked out of, improve tar productivity.
The present invention and existing direct part physical removal every interlayer rock method compared with, do not need accurately that location is every the particular location of interlayer, construction cost is low; Effectively to above interlayer, vapor chamber secondary development can be formed by delivering vapor; Can ensure that vapor chamber is balanced in the horizontal and vertical directions to grow, the effective minimizing harmful effect that vapor chamber is grown in interlayer is to conventional SAGD exploitation, thus improve cumulative recovery; The steam injection initial stage gets final product quick produce oil; Between injection-production well, medium is controlled, guarantees that well group is communicated with; Can strengthen injection-production well spacing (tradition 5 meters), improve cumulative gas-oil ratio, in the oil reservoir of growing every interlayer, method for numerical simulation prediction uses the maximum increase by 70% of tunnel development technique cumulative oil production, and steam oil ratio (SOR) declines 15%; Not by the impact of horizontal segment being inhaled vapour inequality, longer horizontal well can be used, give full play to horizontal well advantage; Set up thermal communication without the need to long-time cyclic preheat to be communicated with fluid, thus significantly can shorten and even skip warm-up phase; Gas-liquid interface is easy to control, reduces SAGD and regulates and controls difficulty and cost; Measurable output, reduces investment risk; Tunnel driving output landwaste can provide accurate reservoir geology information.
It is strong that domestic SAGD develops Reservoir Heterogeneity, and for shallow-layer, undersized knot super-heavy oil deposit, tunnel of the present invention development technique has the superiority that cost is low, yield potential is large, is worth carrying out technology tackling key problem and applying.
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, the 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.And it should be noted that, each ingredient of the present invention is not limited in above-mentioned overall applicability, the each technical characteristic described in manual of the present invention can select one to adopt separately or select the multinomial use that combines according to actual needs, therefore, the present invention covers other relevant with this case inventive point in the nature of things and combines and embody rule.
Claims (8)
1. a dual horizontal well SAGD breaks through the method every interlayer in oil reservoir in exploiting, described dual horizontal well comprises steam injection well and producing well, described steam injection well comprises steam injection well horizontal segment and the vertical section of steam injection well, described producing well comprises producing well horizontal segment and the vertical section of producing well, the described steam injection well water section of putting down to be positioned at above described producing well horizontal segment and parallel with described producing well horizontal segment, be positioned at above described steam injection well horizontal segment every interlayer, it is characterized in that, the method every interlayer in described breakthrough oil reservoir comprises the following steps:
Steps A: excavate tunnel in the oil recovery region of described steam injection well and described producing well, described tunnel extends in the direction laterally extended towards described steam injection well horizontal segment, and described tunnel makes the described oil reservoir every interlayer both sides be connected every interlayer longitudinally running through described;
Step B: fill permeable medium in described tunnel, makes to form the circulation passage flow through for steam and crude oil in described tunnel.
2. dual horizontal well SAGD as claimed in claim 1 breaks through the method every interlayer in oil reservoir in exploiting, and it is characterized in that, the method every interlayer in described breakthrough oil reservoir is further comprising the steps of:
Step C: fill permeable medium in described tunnel after, steam is injected to described steam injection well, steam is delivered to described in the oil reservoir above interlayer via described circulation passage, viscous crude described in making above interlayer is heated, it is glutinous to fall, and the crude oil fallen after sticking enters in described producing well via described circulation passage;
Step D: recover the oil from described producing well.
3. dual horizontal well SAGD as claimed in claim 1 breaks through the method every interlayer in oil reservoir in exploiting, it is characterized in that, described steam injection well and described producing well are all arranged in the first perpendicular, along described first perpendicular excavation tunnel, described steam injection well water well section and described producing well horizontal segment is made all to be positioned at described tunnel.
4. dual horizontal well SAGD as claimed in claim 1 breaks through the method every interlayer in oil reservoir in exploiting, it is characterized in that, described producing well is arranged in the first perpendicular, described steam injection well is arranged in the second perpendicular, described first perpendicular parallels with described second perpendicular and separately, along described first perpendicular excavation tunnel, make described producing well horizontal segment be positioned at described tunnel, the described steam injection well water section of putting down is positioned at outside described tunnel.
5. dual horizontal well SAGD as claimed in claim 1 breaks through the method every interlayer in oil reservoir in exploiting, it is characterized in that, described steam injection well and described producing well are all arranged in the second perpendicular, first perpendicular parallels with described second perpendicular and separately, along described first perpendicular excavation tunnel, described steam injection well horizontal segment and described producing well horizontal segment are all positioned at outside described tunnel.
6. dual horizontal well SAGD as claimed in claim 1 breaks through the method every interlayer in oil reservoir in exploiting, and it is characterized in that, described permeable medium is gravel.
7. dual horizontal well SAGD as claimed in claim 1 breaks through the method every interlayer in oil reservoir in exploiting, it is characterized in that, the length in described tunnel equals the length of described steam injection well horizontal segment, and the width in described tunnel equals the borehole diameter of described steam injection well, and the height in described tunnel equals core intersection.
8. as described in any one of claim 1 to 7, dual horizontal well SAGD breaks through the method every interlayer in oil reservoir in exploiting, and it is characterized in that, the method every interlayer in described breakthrough oil reservoir comprises following concrete steps:
Step S1: horizontal well drilling eye;
Step S2: under enter sap excavating instrument, described sap excavating instrument comprises slotting function module and slotted platform, and described slotting function module comprises the high-pressure spray boring device and coiled tubing that are connected;
Step S3: fluting, described high-pressure spray boring device is made to be crept into by the top of the lower direction oil reservoir of oil reservoir and pass described every interlayer, the continuous inject high pressure fluid of described high-pressure spray boring device, landwaste returns to ground by described coiled tubing, when described high-pressure spray boring device creeps into top of oil horizon, described slotting function module is recalled bottom oil reservoir;
Step S4: described slotted platform of sliding along the direction that steam injection well horizontal segment extends;
Step S5: repeat step S3 to step S4, until described slotted platform arrives the end of steam injection well horizontal segment, sap excavating terminates;
Step S6: fill permeable medium in tunnel;
Step S7: inject steam in steam injection well, steam is delivered to described in the oil reservoir above interlayer via tunnel, the viscous crude described in making above interlayer is heated, it is glutinous to fall, and through being entered in described producing well by described tunnel after viscous crude falls and sticks, is recovered the oil by producing well.
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| CN106499390A (en) * | 2016-09-19 | 2017-03-15 | 中国石油天然气股份有限公司 | Method and device for judging damage of interlayer |
| CN106761630A (en) * | 2016-12-26 | 2017-05-31 | 中国石油天然气股份有限公司 | Reservoir heating and exploitation method and device |
| CN107313756A (en) * | 2017-07-04 | 2017-11-03 | 中国石油大学(北京) | The jet connection of SAGD mudstone foundations is made to squeeze sour remodeling method |
| CN108708700A (en) * | 2018-05-18 | 2018-10-26 | 中国石油天然气股份有限公司 | Method for improving application effect of SAGD technology in heterogeneous reservoir |
| WO2019218798A1 (en) * | 2018-05-14 | 2019-11-21 | 中国石油大学(华东) | Extra-heavy oil development method for strengthening sagd steam chamber so as to break through low-physical-property reservoir |
| CN110821462A (en) * | 2019-10-16 | 2020-02-21 | 新疆中凌工程技术有限公司 | Method for drawing tail end of horizontal well group with interlayer in SAGD control well reservoir |
| CN110905458A (en) * | 2019-11-04 | 2020-03-24 | 泰尔达能源科技（北京）有限公司 | SAGD heavy oil double horizontal well interlayer cutting method |
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| CN106761630A (en) * | 2016-12-26 | 2017-05-31 | 中国石油天然气股份有限公司 | Reservoir heating and exploitation method and device |
| CN107313756A (en) * | 2017-07-04 | 2017-11-03 | 中国石油大学(北京) | The jet connection of SAGD mudstone foundations is made to squeeze sour remodeling method |
| WO2019218798A1 (en) * | 2018-05-14 | 2019-11-21 | 中国石油大学(华东) | Extra-heavy oil development method for strengthening sagd steam chamber so as to break through low-physical-property reservoir |
| CN108708700A (en) * | 2018-05-18 | 2018-10-26 | 中国石油天然气股份有限公司 | Method for improving application effect of SAGD technology in heterogeneous reservoir |
| CN111364961A (en) * | 2018-12-25 | 2020-07-03 | 中国石油天然气股份有限公司 | Super heavy oil SAGD exploitation method |
| CN110821462A (en) * | 2019-10-16 | 2020-02-21 | 新疆中凌工程技术有限公司 | Method for drawing tail end of horizontal well group with interlayer in SAGD control well reservoir |
| CN110821462B (en) * | 2019-10-16 | 2022-03-25 | 新疆中凌工程技术有限公司 | Method for drawing tail end of horizontal well group with interlayer in SAGD control well reservoir |
| CN110905458A (en) * | 2019-11-04 | 2020-03-24 | 泰尔达能源科技（北京）有限公司 | SAGD heavy oil double horizontal well interlayer cutting method |
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