CN101307679B - Thin interlayer steam injection thermal production well mixing-proof well completion process - Google Patents
Thin interlayer steam injection thermal production well mixing-proof well completion process Download PDFInfo
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- CN101307679B CN101307679B CN2008100156936A CN200810015693A CN101307679B CN 101307679 B CN101307679 B CN 101307679B CN 2008100156936 A CN2008100156936 A CN 2008100156936A CN 200810015693 A CN200810015693 A CN 200810015693A CN 101307679 B CN101307679 B CN 101307679B
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Abstract
The invention relates to a method for completing a thin interlayer steam-injection thermal-recovery well in petroleum engineering. The invention adopts the technical proposal that the method comprises the steps as follows: 1) a particular valve hoop is assembled with an external casing packer, and lengths and positions of tools arranged on a well completion string according to the oil well geologic condition after the drilling is completed; 2) a cementing truck is connected with a cementing head for cementing; 3) a bumping rubber plug is displaced to the position of a cementing shoe for bumping; 4) an inner cavity of a casing is decompressed, so that cement paste in a borehole can enter a cavity body through a one-way valve to drive a piston to compress a piston cylinder; pressure of the inner cavity of the casing is boosted for a certain period to drive the piston to compress the cavity body, so that the cement paste in the cavity body enters a flow passage of the cavity body leading to the external casing packer through the one-way valve, thereby expanding and sealing the external casing packer; 5) the external casing packer is completely expanded and sealed to complete the construction through repeating the step 4. The method has the advantages that: the method realizes that the external casing packer is expanded and sealed by the cement paste in the borehole without changing the cementing process, increasing construction risk or increasing the construction period, and has prominent economic and technological benefits.
Description
One, technical field:
The present invention relates to leptophragmata layer steam injection thermal recovery well completion method, particularly a kind of method of thin interlayer steam injection thermal production well mixing-proof well completion in a kind of petroleum works.
Two, background technology:
In conjunction with accompanying drawing 4,5, the completion measure that current steam injection thermal recovery well is general is an earth anchor prestressing force--the well cementation perforation, technology is achieved in that
1. accompanying drawing 4 is connected in series an anchor ingot [a5] in sleeve pipe [a1] bottom, at first fixes the anchor ingot with cement, recycles the cement paste on top through well cementation hole [a3], thereby controls the cement face below circulation port [a3].Cement stone [a4] after the waiting of cement paste thes cement solidifies make whole casing string just by the anchor ingot in well.
2. accompanying drawing 5 is through circulation port [a3] well cementation and bruising.Pulling sleeve pipe [a1] top after the bruising is in whole sleeve pipe [a1] to receive under the tensile stress state, the cement solidifies into cement sheath [a6].The elongation of sleeve pipe in the time of can offsetting steam injection thermal recovery like this.
The oil well geological condition is complicated, possibly have a plurality of series of strata at well bore section of sleeve pipe, and particularly under the leptophragmata layer situation, there are a lot of difficult problems in the existing completion mode of steam injection thermal recovery:
(1) research shows, cement paste forms cement stone will shrink 5-14%, causes second contact surface to have the microgap owing to shrink, and forms the water breakthrough passage.The easy interlayer of steam injection thermal recovery is scurried groove.
(2) the perforating job meeting smashes cement sheath, makes isolated failure to form water breakthrough.
(3) though the swelling stress that sleeve pipe produces when earth anchor prestressing force can effectively prevent steam injection thermal recovery, well-completing process is complicated, prolongs well construction period more than 3 days.
Three, summary of the invention:
The object of the invention is exactly the above-mentioned defective that exists to prior art; A kind of method of thin interlayer steam injection thermal production well mixing-proof well completion is provided; Utilize the variation of well cementation displacement fluid pressure in the sleeve pipe to realize with the bloated tube sealing external packer of the cement paste in the well; Do not change the well cementation operation, do not increase construction risk, do not increase the duration, the economic technology remarkable benefit.
Its technical scheme is: may further comprise the steps:
1), earlier particular usage valve hoop and external packer of pipe are assembled, after the finishing drilling according to the length and the position of the instrument on the oil well completion string;
2), cementing truck connects cementing head, cements the well;
3), replace the bruising plug to the place's bruising of well cementation footwear;
4), the cannula cavity pressure release makes the cement paste in the well get into cavity through one way valve, promotes Piston Compression piston fluid cylinder; Cannula cavity is boosted a period of time, promotes the Piston Compression cavity, makes the cement paste in the cavity get into the runner that leads to the external packer of pipe cavity, expanding sealing sleeve external packer of pipe through one way valve;
5), repeating step 4 fully expands external packer of pipe and seals, and accomplishes all constructions.
The check-valve port of described step 3) specifically to be the bruising plug will connect in being replaced descending process sleeve pipe cavity one side of particular usage valve hoop is opened.
Wherein, described completion tubular column is made up of sleeve pipe, sleeve pipe telescopic compensator, particular usage valve hoop, external packer of pipe and well cementation footwear; Sleeve pipe telescopic compensator, particular usage valve hoop, external packer of pipe, well cementation footwear are all by screw thread serial connection, and sleeve pipe, particular usage valve hoop and external packer of pipe are through being threaded.
In addition, the upper end of described particular usage valve hoop is through screw joint casing, and the lower end is through the external packer of pipe that is threaded; Described particular usage valve hoop mainly is made up of shell body, one way valve, piston, the runner that leads to the external packer of pipe cavity, cavity and piston fluid cylinder; Be provided with the runner, cavity and the piston fluid cylinder that lead to the external packer of pipe cavity in the shell body; Lead between runner and the cavity of external packer of pipe cavity and be provided with one way valve; Be provided with piston in the piston fluid cylinder, the sidewall of cavity is provided with one way valve, is communicated with well through one way valve.
After its effect is the well cementation bruising; Cement paste in the well flows into cavity through one way valve; Force piston through the control cannula cavity makes back and forth that cement paste is pressed into the runner that leads to the external packer of pipe cavity through one way valve in the cavity, thereby changes the purpose that has reached with the bloated tube sealing external packer of cement paste of well through the pressure of cannula cavity well cementation displacement fluid.
The invention has the beneficial effects as follows: the one, at correct position sleeve pipe serial connection sleeve pipe telescopic compensator, it is flexible to compensate the sleeve pipe that thermal recovery causes, protective casing, the earth anchor special cementing is simpler, safer relatively, the shaft building time short; The 2nd, the bloated tube sealing external packer of cement paste makes packer become a solid seal, in short distance, realizes the high-efficiency reliable isolation.Used the particular usage valve hoop, utilized the variation of well cementation displacement fluid pressure in the sleeve pipe to realize changing the well cementation operation, do not increase construction risk, not increasing the duration, the economic technology remarkable benefit with the bloated tube sealing external packer of the cement paste in the well.
Four, description of drawings:
Accompanying drawing 2 is particular usage valve cuff structure fundamental diagrams of the present invention;
Accompanying drawing 3 is sleeve pipe telescopic compensator structure working principle figure of the present invention;
Accompanying drawing 4 is sketch mapes of a kind of prior art;
Accompanying drawing 5 is sketch mapes of a kind of prior art;
In the last Figure 4 and 5: [a.1] sleeve pipe, [a.2] well, [a.3] circulation port, [a.4] cement stone, [a.5] anchor ingot, [a.6] cement sheath, [a.7] bruising plug;
Among last Fig. 1: [1] sleeve pipe, [2] well, [3] sleeve pipe telescopic compensator, [5] particular usage valve hoop, [6] external packer of pipe, [9] well cementation footwear; Among last Fig. 2: runner, [5.7] cavity, [5.8] well, [5.9] piston fluid cylinder, [5.10] cannula cavity of external packer of pipe cavity led in [5.1] shell body, [5.2] one way valve, [5.3] one way valve, [5.4] piston, [5.5] one way valve, [5.6];
Among last Fig. 3: [3.1] cover, [3.2] cover, [3.3] well, [3.4] cannula cavity.
Five, the specific embodiment:
In conjunction with accompanying drawing 1-3, the inventive method is done further to describe:
The completion tubular column of thin interlayer steam injection thermal production well mixing-proof well completion is made up of sleeve pipe 1, sleeve pipe telescopic compensator 3, particular usage valve hoop 5, external packer of pipe 6 and well cementation footwear 9; Sleeve pipe telescopic compensator, particular usage valve hoop, external packer of pipe, well cementation footwear are all by screw thread serial connection, and sleeve pipe, particular usage valve hoop and external packer of pipe are through being threaded.
Wherein, the upper end of particular usage valve hoop is through screw joint casing, and the lower end is through the external packer of pipe that is threaded; Described particular usage valve hoop mainly is made up of shell body 5.1, one way valve (5.2,5.3,5.5), piston 5.4, the runner 5.6 that leads to the external packer of pipe cavity, cavity 5.7 and piston fluid cylinder 5.9; Be provided with the runner, cavity and the piston fluid cylinder that lead to the external packer of pipe cavity in the shell body; Lead between runner and the cavity of external packer of pipe cavity and be provided with one way valve; Be provided with piston in the piston fluid cylinder, the sidewall of cavity is provided with one way valve, is communicated with well 5.8 through one way valve.
The sleeve pipe telescopic compensator comprises cover 3.1, cover 3.2, well 3.3 and cannula cavity 3.4 with reference to accompanying drawing 3.
The operating principle of sleeve pipe telescopic compensator is: cover 3.1 and cover 3.2 overlap 3.2 tops and are connected in series with sleeve pipe with screw thread for the movable sealing formula can be slidingly connected relatively, overlap 3.1 bottoms and are connected in series with sleeve pipe with screw thread.Sleeve pipe is heated and when extending, cover 3.1 slips off elongation relatively with cover 3.2 when steam injection thermal recovery; Temperature descends when stopping annotating, and cover 3.1 is sliding relatively tight with cover 3.2.
The method of thin interlayer steam injection thermal production well mixing-proof well completion may further comprise the steps:
1, with reference to accompanying drawing 1, particular usage valve hoop 5 and external packer of pipe 6 assemble in the workshop, after the finishing drilling according to the length and the position of each instrument on the oil well completion string.
2, cementing truck connects cementing head, presses the normal procedure well cementation.
3,, replace the bruising plug to the place's bruising of well cementation footwear with reference to accompanying drawing 1.(the bruising plug will connect the check-valve port of sleeve pipe cavity one side of particular usage valve hoop and open in being replaced descending process)
4, with reference to accompanying drawing 2, the cannula cavity pressure release makes the cement paste in the well get into cavity through one way valve, promotes Piston Compression piston fluid cylinder; Cannula cavity was boosted 2 minutes, promoted the Piston Compression cavity, made the cement paste in the cavity get into the runner that leads to the external packer of pipe cavity, expanding sealing sleeve external packer of pipe through one way valve.
5, iterative process step (4) is about 3 times, external packer of pipe is fully expanded seal, and accomplishes all constructions.
Claims (2)
1. the method for a thin interlayer steam injection thermal production well mixing-proof well completion is characterized in that may further comprise the steps:
1), earlier particular usage valve hoop and external packer of pipe are assembled, after the finishing drilling according to the length and the position of each composition instrument on the oil well completion string;
2), cementing truck connects cementing head, cements the well;
3), replace the bruising plug to the place's bruising of well cementation footwear;
4), the cannula cavity pressure release makes the cement paste in the well get into cavity through one way valve, promotes Piston Compression piston fluid cylinder; Cannula cavity is boosted a period of time, promotes the Piston Compression cavity, makes the cement paste in the cavity get into the runner that leads to the external packer of pipe cavity through one way valve, and the tube sealing external packer expands;
5), repeating step 4), external packer of pipe is fully expanded seal, accomplish all constructions;
Described completion tubular column is made up of sleeve pipe, sleeve pipe telescopic compensator, particular usage valve hoop, external packer of pipe and well cementation footwear; Sleeve pipe telescopic compensator, particular usage valve hoop, external packer of pipe, well cementation footwear are all by screw thread serial connection, and sleeve pipe, particular usage valve hoop and external packer of pipe are through being threaded;
The upper end of described particular usage valve hoop is through screw joint casing, and the lower end is through the external packer of pipe that is threaded; Described particular usage valve hoop mainly is made up of shell body, one way valve, piston, the runner that leads to the external packer of pipe cavity, cavity and piston fluid cylinder; Be provided with the runner, cavity and the piston fluid cylinder that lead to the external packer of pipe cavity in the shell body; Lead between runner and the cavity of external packer of pipe cavity and be provided with one way valve; Be provided with piston in the piston fluid cylinder, the sidewall of cavity is provided with one way valve, is communicated with well through one way valve.
2. the method for thin interlayer steam injection thermal production well mixing-proof well completion according to claim 1 is characterized in that: described step 3) specifically is the bruising plug will connect cannula cavity one side of particular usage valve hoop in being replaced descending process a one-way valve opens.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100156936A CN101307679B (en) | 2008-04-15 | 2008-04-15 | Thin interlayer steam injection thermal production well mixing-proof well completion process |
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| CN2008100156936A CN101307679B (en) | 2008-04-15 | 2008-04-15 | Thin interlayer steam injection thermal production well mixing-proof well completion process |
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| CN101307679A CN101307679A (en) | 2008-11-19 |
| CN101307679B true CN101307679B (en) | 2012-06-27 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104088599A (en) * | 2014-06-30 | 2014-10-08 | 中国海洋石油总公司 | Expansion bridge blinding method for outer packer of cement paste filled pipe |
| CN104088601A (en) * | 2014-06-30 | 2014-10-08 | 中国海洋石油总公司 | Channeling sealing tool for outer packer of cement paste filled pipe |
| CN107542425A (en) * | 2016-06-28 | 2018-01-05 | 胜利油田胜机石油装备有限公司 | A kind of selective cementing unit |
| CN107503709B (en) * | 2017-07-07 | 2023-04-28 | 中石化石油工程技术服务有限公司 | Well cementation device of thin interlayer adjusting well |
| CN107435527B (en) * | 2017-07-07 | 2019-08-27 | 中石化石油工程技术服务有限公司 | A kind of thin interlayer anti-channeling well cementing operation method |
| CN107905801B (en) * | 2017-12-19 | 2023-05-12 | 中冶京诚工程技术有限公司 | Shield pipe gallery system and construction method thereof |
| CN112709558B (en) * | 2019-10-25 | 2023-01-10 | 中国石油天然气股份有限公司 | Water channeling channel identification method and water drive-to-steam drive reservoir engineering design method |
| CN110905442B (en) * | 2019-12-12 | 2022-04-01 | 中国石油集团渤海钻探工程有限公司 | Empty cement paste of sleeve pipe outer loop fills packer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1456785A (en) * | 2003-05-30 | 2003-11-19 | 中国石化胜利油田有限公司采油工艺研究院 | Selective multi-stage inner pipe cementing process and cemented tubular column there from |
| CN2625571Y (en) * | 2003-05-30 | 2004-07-14 | 中国石化胜利油田有限公司采油工艺研究院 | Impacting seat for well cementing |
| CN1563663A (en) * | 2004-04-16 | 2005-01-12 | 辽河石油勘探局 | Technique for plugging high penetrative water-yielding stratum in oil well by using superfine cement |
| CN2761830Y (en) * | 2005-01-10 | 2006-03-01 | 辽河石油勘探局 | Outside pipe liquid expansion packer |
-
2008
- 2008-04-15 CN CN2008100156936A patent/CN101307679B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1456785A (en) * | 2003-05-30 | 2003-11-19 | 中国石化胜利油田有限公司采油工艺研究院 | Selective multi-stage inner pipe cementing process and cemented tubular column there from |
| CN2625571Y (en) * | 2003-05-30 | 2004-07-14 | 中国石化胜利油田有限公司采油工艺研究院 | Impacting seat for well cementing |
| CN1563663A (en) * | 2004-04-16 | 2005-01-12 | 辽河石油勘探局 | Technique for plugging high penetrative water-yielding stratum in oil well by using superfine cement |
| CN2761830Y (en) * | 2005-01-10 | 2006-03-01 | 辽河石油勘探局 | Outside pipe liquid expansion packer |
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