CN105221131A - The oil production method that SAGD and fireflood are used in conjunction - Google Patents
The oil production method that SAGD and fireflood are used in conjunction Download PDFInfo
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Abstract
The invention provides the oil production method that a kind of SAGD and fireflood are used in conjunction, comprise the steps: to arrange well pattern, inject high-temperature steam to all oil wells and to handle up preheating oil reservoir; In the first straight well and the second straight well, inject air, after injecting high-temperature steam heating oil reservoir in all the other oil wells, stop steam injection; All the other oil well emissions; Continue to inject air in the second straight well, and under enter igniter, the oil reservoir that ignites produces mobiloil, first straight well continues to inject high-temperature steam simultaneously, viscous crude generation interchange of heat in high-temperature steam and oil reservoir produces mobiloil, first horizontal well and the second horizontal well are undertaken on self gravitation flows by action and enter mobiloil in the first horizontal well and the second horizontal well, and mobiloil is lifted to ground.In sum, adopt oil production method of the present invention to achieve SAGD and fireflood and drive after in viscous crude to producing well simultaneously and exploit, the efficiency of gas injection igniting when effectively can improve fireflood, and not easily has channeling occurs in gas injection process, safe and reliable.
Description
Technical field
The present invention relates to technical field of petroleum extraction, be specifically related to the oil production method that a kind of SAGD and fireflood are used in conjunction.
Background technology
Heavy crude reservoir viscosity of crude is high, and in the thickened oil recovery in oil field, because viscous crude has special high viscosity and the characteristic of high-solidification point, poor fluidity in reservoir and pit shaft, conventional mining yield is low, namely cannot ensure normal economic flow rate.In order to ensure rational recovery ratio, often need by adopting thermal recovery technology to reduce thick oil viscosity to recover the oil.
SAGD and SAGD and fireflood are all the routine techniques of heavy crude heat extraction, such as, disclosing a kind of heavy crude reservoir SAGD later stage in Chinese patent ZL201210244366.4 turns fireflood exploitation method, in the method, in the vapor chamber extension phase of SAGD, after the vapor chamber coalescence of adjacent injector-producer pair, in the middle of utilizing, the Injection Well of injector-producer pair injects air ignition, the producing well that this well is right and the right producing well of two, left and right adjacent well are produced, and the Injection Well that two, left and right adjacent well is right transfers the air draft well of fireflood to; Utilize high temperature fireflood leading edge effectively to drive to sweep the remaining reserves of the oil reservoir bottom in the middle of adjacent injector-producer pair.
The heavy crude reservoir SAGD later stage in this patent turns fireflood exploitation method, because SAGD phase duration in early stage is very long, the most of oil extraction in oil reservoir, remain resid amount in oil reservoir less, oil saturation is lower, is unfavorable for later stage fireflood igniting.In addition, in the vapor chamber extension phase of SAGD, after the vapor chamber coalescence of adjacent injector-producer pair, high-temperature steam heating oil reservoir, is liquefied as water gradually by producing well extraction, turns fireflood afterwards and injects air, after vapor chamber before air can fill up, scurry in producing well, in case of air then can burn when producing well recovers the oil, pit shaft even can be caused to explode.
For the problems referred to above, at present effective solution is not yet proposed.
Summary of the invention
The object of the embodiment of the present invention is the oil production method providing a kind of SAGD and fireflood to be used in conjunction, the oil production method utilizing SAGD of the present invention and fireflood to be used in conjunction can solve SAGD when combining oil recovery with fireflood, fireflood igniting technical problem not easily, and not easily there is has channeling when fireflood gas injection, safe and reliable.
The above-mentioned purpose of the embodiment of the present invention can adopt following technical proposal to realize:
The oil production method that SAGD and fireflood are used in conjunction, comprises the steps:
Arrange the first horizontal well, the second horizontal well, the first straight well and four the second straight wells, thus form well pattern,
Described first horizontal well is arranged in oil reservoir, and has the first vertical section and the second vertical section that pass stratum, has the first horizontal segment that section vertical with described first is connected with the described second vertical section between the described first vertical section and the described second vertical section;
Described second horizontal well is arranged in oil reservoir, and there is the 3rd vertical section and the 4th vertical section that pass stratum, there is between described 3rd vertical section and the described 4th vertical section the second horizontal segment that section vertical with the described 3rd is connected with the described 4th vertical section, described second horizontal segment is arranged on above or below described first horizontal segment, and is staggered with described first horizontal segment;
Described first straight well stretches in described oil reservoir, and is arranged on the top of described first horizontal segment and described second horizontal segment intersection;
Described second straight well stretches in described oil reservoir, and be close to mutually two described second straight wells are all positioned at the both sides of one of them vertical section of described first horizontal well or the second horizontal well;
In described first horizontal well, described second horizontal well, described first straight well and described second straight well, inject high-temperature steam, carry out to make described high-temperature steam preheating oil reservoir of handling up;
Air is injected in described first straight well and described second straight well, continue to inject high-temperature steam heating oil reservoir in described first horizontal well and described second horizontal well, after making oil reservoir primary combustion, stop steam injection, and make described first horizontal well and described second horizontal well emission, and then described first horizontal well, described second horizontal well, described first straight well and described second straight well are communicated with;
Continue to inject air in described second straight well, and under enter moveable igniter, by described igniter, the air in described second straight well is heated, thus the viscous crude of the air after heating in oil reservoir is combined ignite oil reservoir to produce mobiloil, continue to inject high-temperature steam to described first straight well simultaneously, the viscous crude generation interchange of heat in described high-temperature steam and oil reservoir is made to produce mobiloil, described first horizontal well and described second horizontal well are undertaken on self gravitation flows by action and enter mobiloil in described first horizontal well and described second horizontal well, and described mobiloil is lifted to ground.
In one embodiment, described second horizontal segment and described first horizontal segment perpendicular, described first straight well is arranged on the top at vertical place.
In one embodiment, described exhaust emissions amount is 1000-3000Nm
3/ d.
In one embodiment, the oil production method that described SAGD and fireflood are used in conjunction also comprises: after described mobiloil is lifted to ground, hot water is injected in described second straight well, continue to inject high-temperature steam in described first straight well, to make remaining viscous crude in oil reservoir be driven in described first horizontal well and described second horizontal well, by described first horizontal well and described second horizontal well, remaining mobiloil is lifted to ground.
In one embodiment, the first horizontal segment of described first horizontal well and the second horizontal segment of described second horizontal well are all positioned at the end circle of described oil reservoir; Described first straight well and described second straight well are all perforated hole, and the perforated interval of described perforated hole is positioned at the 1/2-2/3 place of described oil reservoir.
In one embodiment, described first horizontal well and described second horizontal well are all screen casing sectional well completion.
In one embodiment, when steam soak preheating oil reservoir, enter to run through the first tubing string of the first vertical section and at least part of first horizontal segment under in described first horizontal well, run through the second tubing string of the second vertical section and at least part of first horizontal segment and be positioned at least one first lifting tubing string of the first vertical section and/or the second vertical section; Enter to run through the 3rd tubing string of the 3rd vertical section and at least part of second horizontal segment under in described second horizontal well, run through the 4th tubing string of the 4th vertical section and at least part of second horizontal segment and be positioned at least one second lifting tubing string of the 3rd vertical section and/or the 4th vertical section; Described first tubing string, described second tubing string, described 3rd tubing string and described 4th tubing string are used for injecting high-temperature steam in oil reservoir, and described first lifting tubing string and described second lifting tubing string are used for lifting mobiloil to ground.
In one embodiment, the end of described first tubing string and described second tubing string is oppositely arranged; The end of described 3rd tubing string and described 4th tubing string is oppositely arranged.
In one embodiment, when steam soak preheating oil reservoir, enter the first note under in described first straight well and adopt a tubing string, enter the second note under in described second straight well and adopt a tubing string; Described first note is adopted a tubing string and described second note and is adopted tubing string for after first injecting high-temperature steam in oil reservoir, then lifting mobiloil is to ground.
In one embodiment, when described second straight well injects air, the second note in described second straight well being adopted a tubing string and proposes the second straight well, under in the second straight well, enter gas injection tube column, injecting air for continuing in the second straight well.
In one embodiment, when injecting hot water in the second oil well, the gas injection tube column in described second straight well is proposed the second straight well, in the second straight well, again entering down the second note adopting a tubing string, for injecting hot water in the second straight well.
In one embodiment, the temperature of described hot water is 200 DEG C.
In one embodiment, the 4th monitoring tubing string with entering under in the first monitoring tubing string of thermocouple, described second tubing string with entering under in the second monitoring tubing string of thermocouple, described 3rd tubing string with entering under in the 3rd monitoring tubing string of thermocouple, described 4th tubing string with thermocouple is entered under in described first tubing string; Described first monitoring tubing string, described second monitoring tubing string, described 3rd monitoring tubing string and the described 4th monitor tubing string for monitoring the temperature in oil well, and according to the high-temperature steam injection rate that the temperature adjustment of oil well is injected.
In one embodiment, described first tubing string, described second tubing string, described 3rd tubing string and described 4th tubing string are all respectively arranged with at least one distributing valve, described distributing valve is used for injecting high-temperature steam in described oil reservoir.
In one embodiment, the first horizontal section length of described first horizontal well is 300 meters, and the second horizontal section length of described second horizontal well is 300 meters; Described second straight well distance adjacent upright segment length is 150 meters.
In sum, adopt the oil production method that the SAGD in the embodiment of the present invention and fireflood are used in conjunction, after preheating oil reservoir sets up thermal communication, adopt SAGD and fireflood to drive after in viscous crude to producing well to exploit simultaneously, the efficiency of gas injection igniting when effectively can improve fireflood, and not easily there is has channeling in gas injection process, safe and reliable.
Accompanying drawing explanation
Accompanying drawing described here only for task of explanation, and is not intended to limit scope disclosed by the invention by any way.In addition, the shape of each parts in figure and proportional sizes etc. are only schematic, for helping the understanding of the present invention, are not the shape and the proportional sizes that specifically limit each parts of the present invention.Those skilled in the art under the teachings of the present invention, can select various possible shape and proportional sizes to implement the present invention as the case may be.
Fig. 1 shows the stereogram of well pattern of the present invention and well spacing;
Fig. 2 shows the top view of well pattern of the present invention and well spacing;
Fig. 3 shows the structural representation of the present invention first horizontal well;
Fig. 4 shows the structural representation of the present invention second horizontal well;
Fig. 5 shows the structural representation that note of the present invention adopts a tubing string;
Fig. 6 shows the structural representation of gas injection tube column in the present invention second straight well.
The Reference numeral of above accompanying drawing: 1, the first horizontal well; 11, the first vertical section; 12, the second vertical section; 13, the first horizontal segment; 14, the first tubing string; 141, the first monitoring tubing string; 142, the first oil pipe; 15, the second tubing string; 151, the second monitoring tubing string; 152, the second oil pipe; 16, the first lifting tubing string; 2, the second horizontal well; 21, the 3rd vertical section; 22, the 4th vertical section; 23, the second horizontal segment; 24, the 3rd tubing string; 241, the 3rd monitoring tubing string; 242, the 3rd oil pipe; 25, the 4th tubing string; 251, the 4th monitoring tubing string; 252, the 4th oil pipe; 26, the second lifting tubing string; 3, the first straight well; 4, the second straight well; 41, gas injection tube column; 411, telescoping tube; 412, the 7th oil pipe; 413, horn mouth; 414, the second packer; 5, oil reservoir; 6, temperature monitoring point; 7, distributing valve; 8, the 3rd screen casing; 9, the 3rd packer; 10, seal; 31, the 5th oil pipe; 32, oil well pump; 33, the first screen casing; 34, tail pipe; 35, note adopts a tubing string; 36, the 6th oil pipe; 37, note adopts integrated pump; 38, the second screen casing; 39, the first packer.
Detailed description of the invention
By reference to the accompanying drawings with the description of the specific embodiment of the invention, can clearly understand details of the present invention.But the specific embodiment of the present invention described here, only for explaining object of the present invention, and can not to be understood as by any way be limitation of the present invention.Under the teachings of the present invention, technician can conceive based on distortion possible arbitrarily of the present invention, and these all should be regarded as belonging to scope of the present invention.
As depicted in figs. 1 and 2, the invention provides the oil production method that a kind of SAGD and fireflood are used in conjunction, comprise the steps:
Arrange the first horizontal well 1, second horizontal well 2, first straight well 3 and four the second straight wells 4, thus formation well pattern, described first horizontal well 1 is arranged in oil reservoir 5, and there is the first vertical section 11 and the second vertical section 12 passing stratum, there is between the described first vertical section 11 and the described second vertical section 12 the first horizontal segment 13 that section 11 vertical with described first is connected with the described second vertical section 12;
Described second level 2 well location is in oil reservoir 5, and there is the 3rd vertical section 21 and the 4th vertical section 22 that pass stratum, there is between described 3rd vertical section 21 and the described 4th vertical section 22 the second horizontal segment 23 that section 21 vertical with the described 3rd is connected with the described 4th vertical section 22, described second horizontal segment 23 is arranged on above or below described first horizontal segment 13, and is staggered with described first horizontal segment 13;
Described first straight well 3 stretches in described oil reservoir 5, and is arranged on the top of described first horizontal segment 13 and described second horizontal segment 23 intersection;
Described second straight well 4 stretches in described oil reservoir 5, and be close to mutually two described second straight wells 4 are all positioned at the both sides of one of them vertical section of described first horizontal well 1 or the second horizontal well 2;
In described first horizontal well 1, described second horizontal well 2, described first straight well 3 and described second straight well 4, inject high-temperature steam, described high-temperature steam carries out preheating oil reservoir of handling up;
In described first straight well 3 and described second straight well 4, inject air, continue to inject high-temperature steam heating oil reservoir 5 in described first horizontal well 1 and described second horizontal well 2, after making oil reservoir 5 primary combustion, stop steam injection; To make described first horizontal well 1 and described second horizontal well 2 emission, and then described first horizontal well 1, described second horizontal well 2, described first straight well 3 and described second straight well 4 are communicated with;
Continue to inject air in described second straight well 4, and under enter moveable igniter (not shown), by described igniter, the air in described second straight well 4 is heated, thus make the viscous crude of the air after heating in oil reservoir 5 be combined the oil reservoir 5 that ignites to produce mobiloil, described first straight well 3 continues to inject high-temperature steam simultaneously, viscous crude generation interchange of heat in described high-temperature steam and oil reservoir 5 produces mobiloil, described first horizontal well 1 and described second horizontal well 2 are undertaken on self gravitation flows by action and enter mobiloil in described first horizontal well 1 and described second horizontal well 2, and described mobiloil is lifted to ground.
In the present embodiment, when arranging well pattern, the first horizontal well 1 and the second level 2 well are roughly taken the shape of the letter U.During drilling well, first can drill through one section of L-type horizontal well, then the horizontal segment end drilling through one section of straight well and this L-type horizontal well connects.First horizontal segment 13 of the first horizontal well 1 and the second horizontal segment 23 of the second horizontal well 2 are arranged in certain angle, make first of the first horizontal well 1 the vertical section 11 and the second vertical section 12, and the 3rd of the second horizontal well 2 the vertical section 21 and the 4th vertical section 22 all pass stratum.First straight well 3 is arranged on the top of described first horizontal segment 13 and described second horizontal segment 23 intersection.Four the second straight wells 4 are separately positioned on the both sides of the vertical section of the first horizontal well 1 and the second horizontal well 2, and that is, and be close to mutually two described second straight wells 4 are all positioned at the both sides of one of them vertical section of described first horizontal well 1 or the second horizontal well 2.Certainly, arrange that the order of well pattern also can be upset or at random, this is not affected to the present invention, such as, first arrange the first straight well 3, then locate the second straight well 4 according to the first straight well 3, finally arrange that the first horizontal well 1 and the second horizontal well 2 are also fine.
After well pattern has been arranged, in described first horizontal well 1, described second horizontal well 2, described first straight well 3 and described second straight well 4, inject high-temperature steam, described high-temperature steam carries out preheating oil reservoir 5 of handling up.Wherein, the temperature of high-temperature steam is 260-330 DEG C, and injection pressure is relevant with strata pressure and injection rate, and general injection pressure design is no more than fracture pressure.Fracture pressure is generally 1.8 times of stratum reset pressure, so Safety Injection pressure is generally no more than 1.8 times of strata pressure.After oil reservoir 5 swallows high-temperature steam by described first horizontal well 1, described second horizontal well 2, described first straight well 3 and described second straight well 4, a certain amount of mobiloil that spues is to ground.Wherein the first straight well 3 and the second straight well 4 steam injection 300-500t, injection length 2-3 days.It is 5t/m, injection length 5-7 days that first horizontal well 1 and the second horizontal well 2 inject intensity.This stage can preheating oil reservoir 5, improves the mobility of viscous crude, has channeling when reducing fireflood; The oil that when reducing fireflood, straight well nearly well band (in 1m) is too much, during to prevent after-ignition gas injection, crude oil returns and spits into well, causes pit shaft to burn; Improve the temperature of oil reservoir during igniting, reduce the duration of ignition.
After steam soak preheating oil reservoir, in described first straight well 3 and the second straight well 4, inject air round, wherein air Injection speed 10000Nm
3/ d, injection length 7-15 days.Continue to inject high-temperature steam heating oil reservoir 5 in described first horizontal well 1 and described second horizontal well 2, after making oil reservoir 5 primary combustion, stop steam injection; To make described first horizontal well 1 and described second horizontal well 2 emission, described exhaust emissions amount is 1000-3000Nm
3/ d, and then described first horizontal well 1, described second horizontal well 2, described first straight well 3 and described second straight well 4 are communicated with.This stage can set up the thermal communication on whole stratum, because steam soak warm-up phase reservoir temperature can bring up to about 100 DEG C, reinject air, air can with the heat release of viscous crude generation oxidation reaction, heat can continue to heat oil reservoir 5, and the hot exhaust gas of formation is up walked, so just the oil reservoir 5 on top also preheating, too much tail gas enters between oil reservoir 5 and cap rock, is that oil reservoir 5 is well incubated sheath.
Finally, carry out the Joint Production stage of SAGD and fireflood, in described second straight well 4 continue inject air, and under enter moveable igniter (not shown), the duration of ignition is 7-10 days, air Injection speed 10000Nm
3/ d, can make oil reservoir 5 be heated to 350-400 DEG C.After having put fire, propose portable igniter, continue gas injection, gas injection intensity is adjusted to 250-300Nm
3/ dm, after one month, gas injection intensity is increased to 300-350Nm
3/ dm.By described igniter, the air in described second straight well 4 is heated, thus the viscous crude of the air after heating in oil reservoir 5 is combined, the oil reservoir 5 that ignites produces mobiloil, described first straight well 1 continues to inject high-temperature steam simultaneously, viscous crude generation interchange of heat in described high-temperature steam and oil reservoir 5 produces mobiloil, described first horizontal well 1 and described second horizontal well 2 are undertaken on self gravitation flows by action and enter mobiloil in described first horizontal well 1 and described second horizontal well 2, and described mobiloil is lifted to ground.This stage can fill up before vapor chamber, improve the mass dryness fraction of steam, reduce onlap degree, reduce the heat waste on stratum, improve SAGD effect.Treat that the straight well section temperature of U-shaped horizontal well reaches about 300 DEG C, can next stage be proceeded to.
In sum, adopt the oil production method that the SAGD in the embodiment of the present invention and fireflood are used in conjunction, after preheating oil reservoir sets up thermal communication, adopt SAGD and fireflood to drive after in viscous crude to producing well to exploit simultaneously, the efficiency of gas injection igniting when effectively can improve fireflood, and not easily there is has channeling in gas injection process, safe and reliable.
In one embodiment, after described mobiloil is lifted to ground, fourth stage can be entered, to described second straight, hot water is injected in 4, continue to inject high-temperature steam in described first straight well 3, to make remaining viscous crude in oil reservoir be driven in described first horizontal well 1 and described second horizontal well 2, by described first horizontal well 1 and described second horizontal well 2, remaining mobiloil is lifted to ground.This stage can utilize hot water extraction in Residual oil displacement to the first horizontal well 1 below SAGD vapor chamber and live wire and the second horizontal well 2, increases substantially recovery ratio.
In one embodiment, described second horizontal segment 23 is perpendicular with described first horizontal segment 13, and described first straight well 3 is arranged on the top at vertical place.That is, the angle that the second horizontal segment 23 and the first horizontal segment 13 stagger is 90 °, and the first straight well 3 is positioned at directly over intersection point.
In one embodiment, the first horizontal segment 13 of described first horizontal well 1 and the second horizontal segment 23 of described second horizontal well 2 are all positioned at the end circle of described oil reservoir 5; Described first straight well 3 and described second straight well 4 are all perforated hole, and the perforated interval of described perforated hole is positioned at the 1/2-2/3 place of described oil reservoir 5.
Described first horizontal well 1 is all screen casing sectional well completion with described second level 2 well.That is, enter under entering all down the particular location of at least one the 3rd packer the 9, three packer 9 in the oil jacket annular space of described first horizontal well 1 and described second horizontal well 2 in the oil jacket annular space between two adjacent the 3rd screen casings 8.
In the present embodiment, second horizontal segment 23 of the first horizontal segment 13 of the first horizontal well 1 and the second horizontal well 2 is arranged in the end circle of oil reservoir 5, can be used for heating the viscous crude on oil reservoir 5 end circle, the mobiloil simultaneously produced after SAGD and fireflood, oil reservoir 5 end circle can being flow to by self gravitation effect, being lifted to ground again by the first horizontal well 1 and the second horizontal well 2 driven to being positioned at oil reservoir 5 end circle.The perforated interval of the first straight well 3 and the second straight well 4 is arranged in oil reservoir 1/2-2/3 place, about being namely positioned at the middle part of oil reservoir 5, may be used for heating the viscous crude in the middle part of oil reservoir 5.
In one embodiment, as shown in Figure 3 and Figure 4, during steam soak preheating oil reservoir, enter to run through the first tubing string 14 of the first vertical section 11 and at least part of first horizontal segment 13 under in described first horizontal well 1, run through the second tubing string 15 of the second vertical section 12 and at least part of first horizontal segment 13 and be positioned at least one first lifting tubing string 16 of the first vertical section 11 and/or the second vertical section 12.Enter to run through the 3rd tubing string 24 of the 3rd vertical section 21 and at least part of second horizontal segment 23 under in described second horizontal well 2, run through the 4th tubing string 25 of the 4th vertical section 22 and at least part of second horizontal segment 23 and be positioned at least one second lifting tubing string 26 of the 3rd vertical section 21 and/or the 4th vertical section 22; Described first tubing string 14, described second tubing string 15, described 3rd tubing string 25 and described 4th tubing string 26 for injecting high-temperature steam in oil reservoir 5, described first lifting tubing string 16 with described second lifting tubing string 26 for lifting mobiloil to ground.Described first tubing string 14 can be oppositely arranged with the end of described second tubing string 15; Described 3rd tubing string 24 also can be oppositely arranged with the end of described 4th tubing string 25.
In the present embodiment, described first tubing string 14, described second tubing string 15, described 3rd tubing string 24 and described 4th tubing string 25 are all substantially L-shaped, and L shape tubing string docks use in U-shaped horizontal well.First lifting tubing string 16 can below in the first vertical section 11 and the second vertical section 12 of the first horizontal well 1.Certainly, the first lifting tubing string 16 also can only under the first horizontal well 1 the first vertical section 11 or only under in the second vertical section 12 of the first horizontal well 1.In like manner, the second lifting tubing string 26 can below in the 3rd vertical section 21 and the 4th vertical section 22 of the second horizontal well 2.Certainly, the second lifting tubing string 26 also can only under the second horizontal well 2 the 3rd vertical section 21 or only under in the 4th vertical section 22 of the second horizontal well 2.
As shown in Figure 5, when steam soak preheating oil reservoir, enter the first note under in described first straight well 3 and adopt a tubing string, enter the second note under in described second straight well 2 and adopt a tubing string; Described first note adopts tubing string and described second note, and to adopt a tubular column structure identical, and described first note is adopted a tubing string and described second note and adopted tubing string for after first injecting high-temperature steam in oil reservoir 5, then lifting mobiloil is to ground.
As shown in Figure 6, when described second straight well 4 injects air, the second note in described second straight well 4 being adopted a tubing string and proposes the second straight well 4, under in the second straight well 4, enter gas injection tube column 41, injecting air for continuing in the second straight well 4.
When injecting hot water in the second straight well 4, the gas injection tube column 41 in described second straight well 4 is proposed the second straight well 4, in the second straight well 4, again entering down the second note adopting a tubing string, for injecting hot water in the second straight well 4.The temperature of described hot water is 200 DEG C.Injection rate is 2-5t/hm, i.e. every rice bran oil layer thickness injection per hour 2-5t.If producing well is moisture more than 90%, and recovery percent of reserves is more than 60%.Stop hot-water flooding.
In one embodiment, the 4th monitoring tubing string 251 with entering under in the first monitoring tubing string 141 of thermocouple, described second tubing string 15 with entering under in the second monitoring tubing string 151 of thermocouple, described 3rd tubing string 24 with entering under in the 3rd monitoring tubing string 241 of thermocouple, described 4th tubing string 25 with thermocouple is entered under in described first tubing string 14; Described first monitoring tubing string 141, described second monitoring tubing string 151, described 3rd monitoring tubing string 241 and the described 4th monitor tubing string 251 for monitoring the temperature in oil well, and according to the high-temperature steam amount that the temperature adjustment of oil well is injected.Wherein monitor tubing string and roughly have 10-15 at horizontal segment temperature monitoring point 6, also can be provided with pressure monitoring point (not shown), about pressure monitoring point 4-5.
In one embodiment, described first tubing string 14, described second tubing string 15, described 3rd tubing string 24 and described 4th tubing string 25 are all respectively arranged with at least one distributing valve 7, and described distributing valve 7 for injecting high-temperature steam in described oil reservoir 5.This distributing valve 7 is suitable with the position of the 3rd screen casing 8 on sleeve pipe.
In addition, present invention also offers oil production pattern and tubing string that a kind of SAGD and fireflood be used in conjunction, it comprises:
Be arranged in the first horizontal well 1 of oil reservoir 5, it has the first vertical section 11 and the second vertical section 12 passing stratum respectively, has the first horizontal segment 13 that section 11 vertical with described first is connected with the described second vertical section 12 between the described first vertical section 11 and the described second vertical section 12; Described first horizontal well 1 can be used for injecting high-temperature steam, and/or lifting mobiloil is to ground.
Be arranged in the second horizontal well 2 of oil reservoir 5, it has the 3rd vertical section 21 and the 4th vertical section 22 that pass stratum respectively, there is between described 3rd vertical section 21 and the described 4th vertical section 22 the second horizontal segment 23 that section 21 vertical with the described 3rd is connected with the described 4th vertical section 22, described second horizontal segment 23 is arranged on above or below described first horizontal segment 13, and is staggered with described first horizontal segment 13; Described second level 2 well can be used for injecting high-temperature steam, and/or lifting mobiloil is to ground.
First straight well 3, it stretches in described oil reservoir 5, and is arranged on the top of described first horizontal segment 13 and described second horizontal segment 23 intersection; Described first straight well 3 injects high-temperature steam for continuing in oil reservoir 5.
Four the second straight wells 4, it stretches in described oil reservoir 5, and is separately positioned on the vertical section both sides of described first horizontal well 1 and described second horizontal well 2; Described second straight well 4 can be used for injecting high-temperature steam, and/or injects air, and/or igniting gas injection, and/or injects hot water.
First horizontal segment 13 length of described first horizontal well 1 is 100-600 rice, and the second horizontal segment 23 length of described second horizontal well 2 is 100-600 rice; Described second straight well 4 is 50-300 rice apart from adjacent upright segment length.
In the present embodiment, the first horizontal well 1 and the second horizontal well 2 is made roughly to take the shape of the letter U.During drilling well, first can drill through one section of L-type horizontal well, then the horizontal segment end drilling through one section of straight well and this L-type horizontal well connects.First horizontal segment 13 of the first horizontal well 1 and the second horizontal segment 23 of the second horizontal well 2 are arranged in certain angle, make first of the first horizontal well 1 the vertical section 11 and the second vertical section 12, and the 3rd of the second horizontal well 2 the vertical section 21 and the 4th vertical section 22 all pass stratum.First straight well 3 is arranged on the top of described first horizontal segment 13 and described second horizontal segment 23 intersection.Four the second straight wells 4 are separately positioned on the both sides of the first horizontal well 1 and the vertical section of the second horizontal well 2.
In the present embodiment, in first stage and second stage, in described first horizontal well 1, inject high-temperature steam, in phase III and fourth stage, described first horizontal well 1 for lifting mobiloil to ground.
In first stage and second stage, in described second horizontal well 2, inject high-temperature steam, in phase III and fourth stage, described second horizontal well 2 for lifting mobiloil to ground.
In the first stage to fourth stage, all continue in described first straight well 3 to inject high-temperature steam.
In the first stage, high-temperature steam is injected in described second straight well 4, in second stage, air is injected in described second straight well 4, in the phase III, continue to inject air in described second straight well 4, and be provided with igniter (not shown), in fourth stage, in described second straight well 4, inject hot water.
In sum, adopt the oil production pattern that the SAGD in the embodiment of the present invention and fireflood are used in conjunction, after preheating oil reservoir sets up thermal communication, adopt SAGD and fireflood to drive after in viscous crude to producing well to exploit simultaneously, the efficiency of gas injection igniting when effectively can improve fireflood, and not easily there is has channeling in gas injection process, safe and reliable, thickened oil recovery rate is high.
In one embodiment, described second horizontal segment 23 is perpendicular with described first horizontal segment 13, and described first straight well 3 is arranged on the top at vertical place.
Preferably, the first horizontal segment 13 of described first horizontal well 1 and the second horizontal segment 23 of described second horizontal well 2 are all positioned at the end circle of described oil reservoir 5; Described first straight well 3 and described second straight well 4 are all perforated hole, and the perforated interval of described perforated hole is positioned at the 1/2-2/3 place of described oil reservoir 5.Described first horizontal well 1 and described second horizontal well 2 are all screen casing sectional well completion.
In one embodiment, be provided with the first tubing string 14 running through the first vertical section 11 and at least part of first horizontal segment 13, the second tubing string 15 running through the second vertical section 12 and at least part of first horizontal segment 13 in described first horizontal well 1 and be positioned at least one first lifting tubing string 16 of the first vertical section 11 and/or the second vertical section 12; Enter to run through the 3rd tubing string 24 of the 3rd vertical section 21 and at least part of second horizontal segment 23 under in described second horizontal well 2, run through the 4th tubing string 25 of the 4th vertical section 22 and at least part of second horizontal segment 23 and be positioned at least one second lifting tubing string 26 of the 3rd vertical section 21 and/or the 4th vertical section 22; Described first tubing string 14, described second tubing string 15, described 3rd tubing string 24 and described 4th tubing string 25 for injecting high-temperature steam and monitor the temperature in oil well in oil reservoir 5, described first lifting tubing string 16 and described second lifting tubing string 26 for lifting mobiloil to ground.
Described first tubing string 14 is oppositely arranged with the end of described second tubing string 15; Described 3rd tubing string 24 is oppositely arranged with the end of described 4th tubing string 25.
In one embodiment, described first tubing string 14 comprises the first oil pipe 142, and the first oil pipe 142 described in described first horizontal segment 13 is provided with at least one distributing valve 7, and described first oil pipe 142 afterbody is provided with seal 10; Described second tubing string 15 comprises the second oil pipe 152, and the second oil pipe 152 described in described first horizontal segment 13 is provided with at least one distributing valve 7, and described second oil pipe 152 afterbody is provided with seal 10.Described 3rd tubing string 24 comprises the 3rd oil pipe 242, and the 3rd oil pipe 242 described in described second horizontal segment 23 is provided with at least one distributing valve 7, and described 3rd oil pipe 242 afterbody is provided with seal 10; Described 4th tubing string 25 comprises the 4th oil pipe 252, and the 4th oil pipe 252 described in described second horizontal segment 23 is provided with at least one distributing valve 7, and described 4th oil pipe 252 afterbody is provided with seal 10.Wherein, seal 10 is preferably plug.
Specifically, the quantity of distributing valve 7 can be arranged according to the length of horizontal well horizontal segment, and the position of distributing valve 7 is corresponding with the 3rd screen casing 8 position of horizontal well, and high-temperature steam can be made like this to be directly injected into more fast in oil reservoir 5.The position of the temperature monitoring point 6 of monitoring tubing string corresponds to the position of distributing valve 7.When monitoring tubing string and monitoring out a certain temperature monitoring point 6 temperature higher than preset temperature, by the injection rate of the corresponding minimizing high-temperature steam of distributing valve 7.Otherwise, when monitoring temperature that tubing string monitors out a certain temperature monitoring point 6 lower than preset temperature, by the injection rate of the corresponding increase high-temperature steam of distributing valve 7.
In one embodiment, described first lifting tubing string 16 and described second lifting tubing string 26 all comprise the 5th oil pipe 31 being positioned at vertical section, oil well pump 32 is connected with below described 5th oil pipe 31, be equipped with the sucker rod (not shown) be connected with described oil well pump 32 in described 5th oil pipe 31, below described oil well pump 32, be connected with the first screen casing 33, tail pipe 34 and seal 10 in turn.Mobiloil is all lifted to ground by oil well pump 32 by the first lifting tubing string 16 and the second lifting tubing string 26.Seal 10 is preferably plug.Say further, mobiloil enters in oil well pump 32 through the first screen casing 33, and mobiloil is lifted to ground by oil well pump 32 and sucker rod again.
Be provided with the first note in described first straight well 3 and adopt a tubing string, described first note adopts tubing string for lifting mobiloil after first injecting high-temperature steam in oil reservoir 5 to ground.
In the first stage, be provided with the second note and adopt a tubing string in described second straight well 4, described second note adopts tubing string for lifting mobiloil after first injecting high-temperature steam in oil reservoir 5 to ground.In second stage, be provided with gas injection tube column 41 in described second straight well 4, described gas injection tube column 41 for injecting air in oil reservoir 5, after first horizontal well 1 and the second horizontal well 2 inject a certain amount of steam, stop steam injection, carry out emission, set up the thermal communication of all oil wells in oil reservoir.In the phase III, be provided with the gas injection tube column 41 with igniter (not shown) in described second straight well 4, it is for gas injection of lighting a fire, and carries out fireflood, and the first straight well 3 continues steam injection simultaneously, carries out SAGD production.In fourth stage, be provided with the second note and adopt a tubing string in described second straight well 4, described second note adopts a tubing string for injecting hot water in oil reservoir 5, carries out the mobiloil of hot-water displacement remnants.
Described first note adopts tubing string and described second note, and to adopt a tubular column structure identical, and be all connected with the 6th oil pipe 36 from well head in turn to direction, shaft bottom, note adopts integrated pump 37, second screen casing 38, tail pipe 34 and seal 10.Be arranged with instlated tubular (not shown) outside described 6th oil pipe 36, prevent the too high damage oil pipe of temperature.Described first note is adopted in oil jacket annular space that a tubing string and described second note adopt a tubing string and is all provided with the first packer 39, and described first packer 39 is positioned at the top that described note adopts integrated pump 37.Seal 10 is preferably plug.Note is adopted tubing string 35 and is utilized note to adopt after integrated pump 37 first injects high-temperature steam in oil reservoir 5, then lifting mobiloil is to ground.
Described gas injection tube column 41 is connected with telescoping tube 411, the 7th oil pipe 412 and horn mouth 413 from well head in turn to direction, shaft bottom, described horn mouth 413 stretches in described oil reservoir 5, instlated tubular (not shown) is arranged with outside described 7th oil pipe 412, be provided with the second packer 414 in the oil jacket annular space of described gas injection tube column 41, described second packer 414 is positioned at the top of described horn mouth 413.Gas injection tube column 41, for injecting air in oil reservoir 5, can also enter down moveable igniter (not shown) therein.
Each embodiment in this manual all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar part mutually see.
Above-described embodiment, only for technical conceive of the present invention and feature are described, its object is to person skilled in the art can be understood content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences done according to Spirit Essence of the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (15)
1. the oil production method that is used in conjunction of SAGD and fireflood, is characterized in that, comprise the steps:
Arrange the first horizontal well, the second horizontal well, the first straight well and four the second straight wells, thus form well pattern,
Described first horizontal well is arranged in oil reservoir, and has the first vertical section and the second vertical section that pass stratum, has the first horizontal segment that section vertical with described first is connected with the described second vertical section between the described first vertical section and the described second vertical section;
Described second horizontal well is arranged in oil reservoir, and there is the 3rd vertical section and the 4th vertical section that pass stratum, there is between described 3rd vertical section and the described 4th vertical section the second horizontal segment that section vertical with the described 3rd is connected with the described 4th vertical section, described second horizontal segment is arranged on above or below described first horizontal segment, and is staggered with described first horizontal segment;
Described first straight well stretches in described oil reservoir, and is arranged on the top of described first horizontal segment and described second horizontal segment intersection;
Described second straight well stretches in described oil reservoir, and be close to mutually two described second straight wells are all positioned at the both sides of one of them vertical section of described first horizontal well or the second horizontal well;
In described first horizontal well, described second horizontal well, described first straight well and described second straight well, inject high-temperature steam, carry out to make described high-temperature steam preheating oil reservoir of handling up;
Air is injected in described first straight well and described second straight well, continue to inject high-temperature steam heating oil reservoir in described first horizontal well and described second horizontal well, after making oil reservoir primary combustion, stop steam injection, and make described first horizontal well and described second horizontal well emission, and then described first horizontal well, described second horizontal well, described first straight well and described second straight well are communicated with;
Continue to inject air in described second straight well, and under enter moveable igniter, by described igniter, the air in described second straight well is heated, thus the viscous crude of the air after heating in oil reservoir is combined ignite oil reservoir to produce mobiloil, continue to inject high-temperature steam to described first straight well simultaneously, the viscous crude generation interchange of heat in described high-temperature steam and oil reservoir is made to produce mobiloil, described first horizontal well and described second horizontal well are undertaken on self gravitation flows by action and enter mobiloil in described first horizontal well and described second horizontal well, and described mobiloil is lifted to ground.
2. the oil production method that is used in conjunction of SAGD according to claim 1 and fireflood, is characterized in that, described second horizontal segment and described first horizontal segment perpendicular, described first straight well is arranged on the top at vertical place.
3. the oil production method that is used in conjunction of SAGD according to claim 1 and fireflood, it is characterized in that, described exhaust emissions amount is 1000-3000Nm
3/ d.
4. the oil production method that is used in conjunction of SAGD according to claim 1 and fireflood, it is characterized in that, the oil production method that described SAGD and fireflood are used in conjunction also comprises: after described mobiloil is lifted to ground, hot water is injected in described second straight well, continue to inject high-temperature steam in described first straight well, to make remaining viscous crude in oil reservoir be driven in described first horizontal well and described second horizontal well, by described first horizontal well and described second horizontal well, remaining mobiloil is lifted to ground.
5. the oil production method that is used in conjunction of SAGD according to claim 1 and fireflood, it is characterized in that, the first horizontal segment of described first horizontal well and the second horizontal segment of described second horizontal well are all positioned at the end circle of described oil reservoir; Described first straight well and described second straight well are all perforated hole, and the perforated interval of described perforated hole is positioned at the 1/2-2/3 place of described oil reservoir.
6. the oil production method that is used in conjunction of SAGD according to claim 1 and fireflood, it is characterized in that, described first horizontal well and described second horizontal well are all screen casing sectional well completion.
7. the oil production method that is used in conjunction of SAGD according to claim 1 and fireflood, it is characterized in that, when steam soak preheating oil reservoir, enter to run through the first tubing string of the first vertical section and at least part of first horizontal segment under in described first horizontal well, run through the second tubing string of the second vertical section and at least part of first horizontal segment and be positioned at least one first lifting tubing string of the first vertical section and/or the second vertical section; Enter to run through the 3rd tubing string of the 3rd vertical section and at least part of second horizontal segment under in described second horizontal well, run through the 4th tubing string of the 4th vertical section and at least part of second horizontal segment and be positioned at least one second lifting tubing string of the 3rd vertical section and/or the 4th vertical section; Described first tubing string, described second tubing string, described 3rd tubing string and described 4th tubing string are used for injecting high-temperature steam in oil reservoir, and described first lifting tubing string and described second lifting tubing string are used for lifting mobiloil to ground.
8. the oil production method that is used in conjunction of SAGD according to claim 1 and fireflood, it is characterized in that, the end of described first tubing string and described second tubing string is oppositely arranged; The end of described 3rd tubing string and described 4th tubing string is oppositely arranged.
9. the oil production method that the SAGD according to claim 1 or 7 and fireflood are used in conjunction, is characterized in that, when steam soak preheating oil reservoir, enters the first note and adopt a tubing string under in described first straight well, enter the second note and adopt a tubing string under in described second straight well; Described first note is adopted a tubing string and described second note and is adopted tubing string for after first injecting high-temperature steam in oil reservoir, then lifting mobiloil is to ground.
10. the oil production method that is used in conjunction of SAGD according to claim 9 and fireflood, it is characterized in that, when described second straight well injects air, the second note in described second straight well is adopted a tubing string and proposes the second straight well, entering gas injection tube column under in the second straight well, injecting air for continuing in the second straight well.
The oil production method that 11. SAGD according to claim 10 and fireflood are used in conjunction, it is characterized in that, when injecting hot water in the second oil well, gas injection tube column in described second straight well is proposed the second straight well, in the second straight well, again entering down the second note adopting a tubing string, for injecting hot water in the second straight well.
The oil production method that 12. SAGD according to claim 11 and fireflood are used in conjunction, is characterized in that, the temperature of described hot water is 200 DEG C.
The oil production method that 13. SAGD according to claim 7 and fireflood are used in conjunction, it is characterized in that, under in described first tubing string, entering the 4th monitoring tubing string with entering under in the first monitoring tubing string of thermocouple, described second tubing string with entering under in the second monitoring tubing string of thermocouple, described 3rd tubing string with entering under in the 3rd monitoring tubing string of thermocouple, described 4th tubing string with thermocouple; Described first monitoring tubing string, described second monitoring tubing string, described 3rd monitoring tubing string and the described 4th monitor tubing string for monitoring the temperature in oil well, and according to the high-temperature steam injection rate that the temperature adjustment of oil well is injected.
The oil production method that 14. SAGD according to claim 7 or 13 and fireflood are used in conjunction, it is characterized in that, described first tubing string, described second tubing string, described 3rd tubing string and described 4th tubing string are all respectively arranged with at least one distributing valve, and described distributing valve is used for injecting high-temperature steam in described oil reservoir.
The oil production method that 15. SAGD according to claim 1 and fireflood are used in conjunction, is characterized in that, the first horizontal section length of described first horizontal well is 300 meters, and the second horizontal section length of described second horizontal well is 300 meters; Described second straight well distance adjacent upright segment length is 150 meters.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105863591A (en) * | 2016-05-18 | 2016-08-17 | 中国石油天然气股份有限公司 | Preheating method and preheating well for fireflooding assisted gravity oil drainage |
| CN106640012A (en) * | 2016-12-01 | 2017-05-10 | 中国石油天然气股份有限公司 | Fireflooding oil-extracting method for exploiting super heavy oil reservoir with bottom water |
| CN106930741A (en) * | 2017-05-17 | 2017-07-07 | 中国石油大学(华东) | A kind of method and apparatus for exploiting thick-layer heavy crude 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 |
| CN112240182A (en) * | 2020-10-30 | 2021-01-19 | 中国石油天然气股份有限公司 | Unconventional oil reservoir recovery rate improving method and system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4434849A (en) * | 1978-09-07 | 1984-03-06 | Heavy Oil Process, Inc. | Method and apparatus for recovering high viscosity oils |
| US20120145463A1 (en) * | 2004-11-19 | 2012-06-14 | Halliburton Energy Services, Inc. | Methods and apparatus for drilling, completing and configuring u-tube boreholes |
| 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 |
| US20130146283A1 (en) * | 2011-11-25 | 2013-06-13 | Archon Technologies Ltd. | Oil recovery process using crossed hortizonal wells |
| CN203394444U (en) * | 2013-05-29 | 2014-01-15 | 中国石油天然气股份有限公司 | Fireflood-assisted gravity drainage injection and production technology system |
| CN104314532A (en) * | 2014-10-20 | 2015-01-28 | 中国石油天然气股份有限公司 | Mining method for heavy oil reservoir and well network thereof |
| CN204175277U (en) * | 2014-10-20 | 2015-02-25 | 中国石油天然气股份有限公司 | Well pattern in a kind of heavy crude reservoir exploitation |
| CN104963669A (en) * | 2015-07-02 | 2015-10-07 | 中国石油天然气股份有限公司 | Heavy oil thermal recovery method and well pattern thereof |
-
2015
- 2015-10-10 CN CN201510651367.4A patent/CN105221131B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4434849A (en) * | 1978-09-07 | 1984-03-06 | Heavy Oil Process, Inc. | Method and apparatus for recovering high viscosity oils |
| US20120145463A1 (en) * | 2004-11-19 | 2012-06-14 | Halliburton Energy Services, Inc. | Methods and apparatus for drilling, completing and configuring u-tube boreholes |
| US20130146283A1 (en) * | 2011-11-25 | 2013-06-13 | Archon Technologies Ltd. | Oil recovery process using crossed hortizonal wells |
| 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 |
| CN203394444U (en) * | 2013-05-29 | 2014-01-15 | 中国石油天然气股份有限公司 | Fireflood-assisted gravity drainage injection and production technology system |
| CN104314532A (en) * | 2014-10-20 | 2015-01-28 | 中国石油天然气股份有限公司 | Mining method for heavy oil reservoir and well network thereof |
| CN204175277U (en) * | 2014-10-20 | 2015-02-25 | 中国石油天然气股份有限公司 | Well pattern in a kind of heavy crude reservoir exploitation |
| CN104963669A (en) * | 2015-07-02 | 2015-10-07 | 中国石油天然气股份有限公司 | Heavy oil thermal recovery method and well pattern thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105863591A (en) * | 2016-05-18 | 2016-08-17 | 中国石油天然气股份有限公司 | Preheating method and preheating well for fireflooding assisted gravity oil drainage |
| CN106640012A (en) * | 2016-12-01 | 2017-05-10 | 中国石油天然气股份有限公司 | Fireflooding oil-extracting method for exploiting super heavy oil reservoir with bottom water |
| CN106930741A (en) * | 2017-05-17 | 2017-07-07 | 中国石油大学(华东) | A kind of method and apparatus for exploiting thick-layer heavy crude reservoir |
| CN106930741B (en) * | 2017-05-17 | 2019-03-12 | 中国石油大学(华东) | A kind of method and apparatus for exploiting thick-layer heavy crude 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 |
| CN112240182A (en) * | 2020-10-30 | 2021-01-19 | 中国石油天然气股份有限公司 | Unconventional oil reservoir recovery rate improving method and system |
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