CN205078259U - Horizontal well gas injection producing pattern - Google Patents
Horizontal well gas injection producing pattern Download PDFInfo
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- CN205078259U CN205078259U CN201520793870.9U CN201520793870U CN205078259U CN 205078259 U CN205078259 U CN 205078259U CN 201520793870 U CN201520793870 U CN 201520793870U CN 205078259 U CN205078259 U CN 205078259U
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Abstract
The utility model provides a horizontal well gas injection producing pattern, horizontal well gas injection producing pattern include straight well gas injection well array, horizontal gas injection well, first lines of producing wells and the second lines of producing wells of arranging in proper order along the horizontal direction, and straight well gas injection well array contains the straight well gas injection well that the duo kou interval set up, and first lines of producing wells contain the improve level producing well and the flat producing well that enters the water that upper and lower interval set up, and the second lines of producing wells also contain the producing well of improving level that upper and lower interval set up puts down the producing well with the offal. The beneficial effects of the utility model are that, utilize the straight well gas injection well to ignite to the indirect conduction formula of horizontal gas injection well to realize horizontal gas injection well and ignite, enlarged the area of contact of straight well gas injection well and horizontal gas injection well and oil reservoir, moreover, adopt horizontal producing well can further increase the draining district, utilize horizontal producing well gas -liquid branch to adopt, the flowing back ability of the producing well of can improving the standard, and then can improve the single well yield and the recovery percentage of fireflood.
Description
Technical field
The utility model relates to field of petroleum exploitation, specifically a kind of horizontal well gas-injection producing pattern.
Background technology
Fireflood technology is a kind of method improving recovery ratio, and it is by injecting air in oil reservoir, utilizes a part of heavy ingredient of oil reservoir Crude Oil to make fuel, heat-dissipating of constantly burning, the crude oil in oil reservoir is displaced.Laboratory experiment proves, the residual oil saturation of combustion zone is almost nil, and recovery ratio can reach 85%-90%.
Fireflood process is the process that combustion front slowly advances from Injection Well to a bite or several mouthfuls of producing wells substantially.This process is that Injection Well air Injection being arranged in center starts, and has one group of producing well around Injection Well.After defining the penetrating power to gas, combustion front will moving radially along Injection Well.
Fireflood Injection Well normally straight well, the well pattern of employing generally adopts line pattern, five-spot pattern and inverted nine-spot pattern.Line pattern is that a few row's Injection Well disposed by plan-parallel structure line, disposes a row or multi-row producing well between every two row's Injection Wells.Five-spot pattern is the well pattern based on square, middle a bite Injection Well, and around four mouthfuls of producing wells, form a flooding unit.Inverted nine-spot pattern is the well pattern based on square, middle a bite Injection Well, and around eight mouthfuls of producing wells, form a flooding unit.
Horizontal well is wider in the application of steam injection field as Injection Well, as the advantage that producing well is exploited, horizontal well is that single well controlled reserves is large, output is high, penetration is high, cost for oil production is lower than straight well, there is the well completion interval longer than straight well, larger draining district can be produced, the connectedness of oil reservoir can be transformed, effectively can suppress the water cone or the gas coning that have end water or gas cap reservoir, have fracturing make seam can not rational oriented control and cut to lengthen, can avoiding obstacles and bad environments area etc.But because fireflood gas injection needs igniting, and the ignition process of the long distance of horizontal well is still immature, and therefore scene is difficult to adopt horizontal well to do gas injection well, and the advantage of horizontal well can not be played, and fireflood development effectiveness is lower.
Utility model content
In order to overcome the low deficiency of existing fireflood development effectiveness, the utility model provides a kind of horizontal well gas-injection producing pattern, to reach the object improving fireflood development effectiveness.
The utility model solves the technical scheme that its technical problem adopts: a kind of horizontal well gas-injection producing pattern, horizontal well gas-injection producing pattern comprises the straight well gas injection well array be arranged in order in the horizontal direction, horizontal gas injection well, the first lines of producing wells and the second lines of producing wells, straight well gas injection well array contains many mouthfuls of spaced straight well gas injection wells, first lines of producing wells contain upper and lower spaced upper horizontal production well and lower horizontal production well, and the second lines of producing wells are also containing upper and lower spaced upper horizontal production well and lower horizontal production well.
Further, straight well gas injection well array, horizontal gas injection well, be parallel to each other between the first lines of producing wells and the second lines of producing wells.
Further, the length of horizontal gas injection well is 280m ~ 320m.
Further, the distance between straight well gas injection well array and horizontal gas injection well is 15m ~ 25m, and the distance between straight well gas injection well array and the first lines of producing wells is 95m ~ 105m.
Further, the distance between the second lines of producing wells and the first lines of producing wells is 95m ~ 105m.
Further, the bottom of every mouthful of straight well gas injection well is provided with the first perforated interval, and the perforation thickness of the first perforated interval is 8m ~ 12m.
Further, horizontal gas injection well is all positioned at oil reservoir, and 4m ~ 6m bottom the perigee distance oil reservoir of horizontal gas injection well.
Further, upper horizontal production well and lower horizontal production well are parallel to each other, and upper horizontal production well is positioned at directly over lower horizontal production well.
Further, upper horizontal production well is all positioned at oil reservoir, the top 8m ~ 12m of this oil reservoir of apogee distance of upper horizontal production well, and lower horizontal production well is all positioned at oil reservoir, the bottom 4m ~ 6m of this oil reservoir of perigee distance of lower horizontal production well.
Further, many mouthfuls of straight well gas injection wells are equidistantly uniform, and the distance span between adjacent two mouthfuls of straight well gas injection wells is 95m ~ 105m.
The beneficial effects of the utility model are, utilize straight well gas injection well to the indirect conduction-type igniting of horizontal gas injection well, thus realize the igniting of horizontal gas injection well, expand the contact area of straight well gas injection well and horizontal gas injection well and oil reservoir, and, adopt horizontal production well can increase draining district further, utilize horizontal production well gas-liquid to divide and adopt, can to improve the standard the drainage capacity of producing well, and then well yield and the recovery percent of reserves of fireflood can be improved.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the main TV structure schematic diagram of the utility model horizontal well gas-injection producing pattern embodiment;
Fig. 2 is the side-looking structural representation of the utility model horizontal well gas-injection producing pattern embodiment.
Reference numeral in figure: 10, straight well gas injection well array; 11, the first perforated interval; 20, horizontal gas injection well; 30, the first lines of producing wells; 31, upper horizontal production well; 32, lower horizontal production well; 40, the second lines of producing wells.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the utility model in detail in conjunction with the embodiments.
As depicted in figs. 1 and 2, the utility model embodiment provides a kind of horizontal well gas-injection producing pattern, horizontal well gas-injection producing pattern comprise be arranged in order in the horizontal direction straight well gas injection well array 10, horizontal gas injection well 20, first lines of producing wells 30 and the second lines of producing wells 40, straight well gas injection well array 10 is containing many mouthfuls of spaced straight well gas injection wells, first lines of producing wells 30 also contain upper and lower spaced upper horizontal production well 31 and lower horizontal production well 32 containing upper and lower spaced upper horizontal production well 31 and lower horizontal production well 32, second lines of producing wells 40.Upper horizontal production well 31 in the utility model embodiment is for exhaust, and lower horizontal production well 32 is for adopting liquid.
The utility model embodiment utilizes straight well gas injection well to the conduction-type igniting indirectly of horizontal gas injection well 20, thus realize horizontal gas injection well 20 and light a fire, expand the contact area of straight well gas injection well and horizontal gas injection well 20 and oil reservoir, and, adopt horizontal production well can increase draining district further, utilize horizontal production well gas-liquid to divide to adopt, the drainage capacity of producing well of can improving the standard, and then well yield and the recovery percent of reserves that can improve fireflood.
Straight well gas injection well array 10 in the utility model embodiment, to be parallel to each other between horizontal gas injection well 20, first lines of producing wells 30 and the second lines of producing wells 40.Above-mentioned straight well gas injection well array 10 has 3 mouthfuls of straight well gas injection wells, and every mouthful of straight well gas injection well is at a distance of 95m ~ 105m, and the line of centres of above-mentioned 3 mouthfuls of straight well gas injection wells is a straight line.Horizontal gas injection well 20 is parallel with the line of 3 mouthfuls of straight well gas injection wells, and the length of horizontal gas injection well 20 is 280m ~ 320m, and the center of horizontal gas injection well 20 is corresponding with the mid point of straight well gas injection well array.
Preferably, the distance between above-mentioned straight well gas injection well array 10 and horizontal gas injection well 20 is 15m ~ 25m, and the distance between straight well gas injection well array 10 and the first lines of producing wells 30 is 95m ~ 105m.Distance between above-mentioned second lines of producing wells 40 and the first lines of producing wells 30 is 95m ~ 105m.Namely straight well gas injection well array 10, first lines of producing wells 30 in the utility model embodiment are identical with the spacing distance between the second lines of producing wells 40, and above-mentioned horizontal gas injection well 20 is arranged between straight well gas injection well array 10 and the first lines of producing wells 30.
As shown in Figure 2, the perforation thickness that the bottom of every mouthful of straight well gas injection well in the utility model embodiment is provided with the first perforated interval 11, first perforated interval 11 is 8m ~ 12m.The thickness of perforation is designed, the indirect conduction-type igniting of straight well gas injection well to horizontal gas injection well 20 can be realized better.
Preferably, horizontal gas injection well 20 is all positioned at oil reservoir, and the perigee distance oil reservoir distance from bottom of horizontal gas injection well 20 is A, and wherein the span of A is 4m ~ 6m.
Further, the first lines of producing wells 30 and the second lines of producing wells 40 include vertically upper and lower spaced upper horizontal production well 31 and lower horizontal production well 32.Upper horizontal production well 31 and lower horizontal production well 32 are parallel to each other, and upper horizontal production well 31 is positioned at directly over lower horizontal production well 32.
It should be noted that, upper horizontal production well 31 in the utility model embodiment is all positioned at oil reservoir, the apogee distance top of oil horizon distance of upper horizontal production well 31 is B, wherein the span of B is 8m ~ 12m (about occupying 1/3rd of oil reservoir gross thickness), lower horizontal production well 32 is all positioned at oil reservoir, distance bottom the perigee distance oil reservoir of lower horizontal production well 32 is A, and wherein the span of A is 4m ~ 6m.
The utility model embodiment is applicable to core intersection and is greater than 10m and the heavy crude reservoir being less than 30m.When real work, the straight well gas injection well array 10 in the utility model embodiment is made up of 3 mouthfuls of straight well gas injection wells, interval 100m between every mouthful of straight well gas injection well.Every mouthful of straight well gas injection well is provided with the first perforated interval 11 in bottom, the perforation thickness of this first perforated interval 11 is 10m.
Above-mentioned horizontal gas injection well 20 length 300m, and this horizontal gas injection well 20 and straight well gas injection well array 10 parallel interval 20m.As depicted in figs. 1 and 2, above-mentioned horizontal gas injection well 20 is all positioned at oil reservoir, and the bottom 5m of the outer peripheral face perigee distance oil reservoir of horizontal gas injection well 20.
Above-mentioned first lines of producing wells 30 are arranged on the side of horizontal gas injection well 20 away from straight well gas injection well, and above-mentioned first lines of producing wells 30 comprise horizontal production well 31 and lower horizontal production well 32.Upper horizontal production well 31 is all positioned at oil reservoir, the apogee distance top of oil horizon 10m of upper horizontal production well 31, and lower horizontal production well 32 is all positioned at oil reservoir, 5m bottom the perigee distance oil reservoir of lower horizontal production well 32.
Above-mentioned second lines of producing wells 40 are arranged on the side of the first lines of producing wells 30 away from horizontal gas injection well 20, and above-mentioned second lines of producing wells 40 also comprise horizontal production well 31 and lower horizontal production well 32.Upper horizontal production well 31 is all positioned at oil reservoir, the apogee distance top of oil horizon 10m of upper horizontal production well 31, and lower horizontal production well 32 is all positioned at oil reservoir, 5m bottom the perigee distance oil reservoir of lower horizontal production well 32.
During work, first implement igniting to 3 mouthfuls of straight well gas injection wells, at this moment horizontal production well is not produced, and horizontal gas injection well 20 is produced.Subsequently, live wire is drawn to horizontal gas injection well 20 and temperature monitoring is carried out to horizontal gas injection well 20.When the temperature of horizontal gas injection well 20 reaches 200 DEG C, horizontal gas injection well 20 is made to stop producing and starting to carry out gas injection to horizontal gas injection well 20.When the temperature of horizontal gas injection well 20 reaches more than 350 DEG C, show that straight well gas injection well is lighted a fire successfully to the indirect conduction-type of horizontal gas injection well 20, at this moment, close straight well gas injection well, horizontal production well starts to produce.
From above description, can find out, the utility model the above embodiments achieve following technique effect: utilize straight well gas injection well to the indirect conduction-type igniting of horizontal gas injection well, thus realize the igniting of horizontal gas injection well, expand the contact area of straight well gas injection well and horizontal gas injection well and oil reservoir, and, adopt horizontal production well can increase draining district further, utilize horizontal production well gas-liquid to divide to adopt, can to improve the standard the drainage capacity of producing well, and then well yield and the recovery percent of reserves of fireflood can be improved.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (10)
1. a horizontal well gas-injection producing pattern, it is characterized in that, described horizontal well gas-injection producing pattern comprises the straight well gas injection well array (10) be arranged in order in the horizontal direction, horizontal gas injection well (20), first lines of producing wells (30) and the second lines of producing wells (40), straight well gas injection well array (10) is containing many mouthfuls of spaced straight well gas injection wells, first lines of producing wells (30) are containing upper and lower spaced upper horizontal production well (31) and lower horizontal production well (32), second lines of producing wells (40) are also containing upper and lower spaced upper horizontal production well (31) and lower horizontal production well (32).
2. horizontal well gas-injection producing pattern according to claim 1, it is characterized in that, straight well gas injection well array (10), horizontal gas injection well (20), to be parallel to each other between the first lines of producing wells (30) and the second lines of producing wells (40).
3. horizontal well gas-injection producing pattern according to claim 1, is characterized in that, the length of horizontal gas injection well (20) is 280m ~ 320m.
4. horizontal well gas-injection producing pattern according to claim 1, it is characterized in that, distance between straight well gas injection well array (10) and horizontal gas injection well (20) is 15m ~ 25m, and the distance between straight well gas injection well array (10) and the first lines of producing wells (30) is 95m ~ 105m.
5. horizontal well gas-injection producing pattern according to claim 1, is characterized in that, the distance between the second lines of producing wells (40) and the first lines of producing wells (30) is 95m ~ 105m.
6. horizontal well gas-injection producing pattern according to claim 1, it is characterized in that, the bottom of every mouthful of straight well gas injection well (10) is provided with the first perforated interval (11), and the perforation thickness of the first perforated interval (11) is 8m ~ 12m.
7. horizontal well gas-injection producing pattern according to claim 1, is characterized in that, horizontal gas injection well (20) is all positioned at oil reservoir, and 4m ~ 6m bottom the perigee distance oil reservoir of horizontal gas injection well (20).
8. horizontal well gas-injection producing pattern according to claim 1, it is characterized in that, upper horizontal production well (31) and lower horizontal production well (32) are parallel to each other, and upper horizontal production well (31) is positioned at directly over lower horizontal production well (32).
9. horizontal well gas-injection producing pattern according to claim 1, it is characterized in that, upper horizontal production well (31) is all positioned at oil reservoir, top 8m ~ the 12m of this oil reservoir of apogee distance of upper horizontal production well (31), lower horizontal production well (32) is all positioned at this oil reservoir, the bottom 4m ~ 6m of this oil reservoir of perigee distance of lower horizontal production well (32).
10. horizontal well gas-injection producing pattern according to claim 1, is characterized in that, many mouthfuls of straight well gas injection wells are equidistantly uniform, and the distance span between adjacent two mouthfuls of straight well gas injection wells is 95m ~ 105m.
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| CN201520793870.9U CN205078259U (en) | 2015-10-14 | 2015-10-14 | Horizontal well gas injection producing pattern |
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| CN201520793870.9U CN205078259U (en) | 2015-10-14 | 2015-10-14 | Horizontal well gas injection producing pattern |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108518213A (en) * | 2018-04-12 | 2018-09-11 | 中北大学 | A kind of rock high-temperature high-pressure overheat steam control crushing test device |
| 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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2015
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108518213A (en) * | 2018-04-12 | 2018-09-11 | 中北大学 | A kind of rock high-temperature high-pressure overheat steam control crushing test device |
| 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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