CN105464625A - Tight oil-gas well airlock treatment method - Google Patents
Tight oil-gas well airlock treatment method Download PDFInfo
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- CN105464625A CN105464625A CN201410458787.6A CN201410458787A CN105464625A CN 105464625 A CN105464625 A CN 105464625A CN 201410458787 A CN201410458787 A CN 201410458787A CN 105464625 A CN105464625 A CN 105464625A
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Abstract
The invention discloses a tight oil-gas well airlock treatment method and belongs to the technical field of oil exploitation. The tight oil-gas well airlock treatment method includes the steps of closing a special valve, connected with a wellhead little spool and an oil gathering pipeline, for a 250-type Christmas tree after airlock is determined; through change conditions of pressure of an oil pressure gauge and a return pressure gauge during up-down stroke of a pumping unit, controlling the valve of the 250-type Christmas tree to open and close according to a difference value of pressure values shown by the oil pressure gauge and the return pressure gauge, and opening the special valve, connected with the wellhead little spool and the oil gathering pipeline, for the 250-type Christmas tree until the pressure of the oil pressure gauge is larger than that of the return pressure gauge by 2.0-2.5MPa; achieving normal production of the oil well and enabling the oil-gas well airlock is overcome. The tight oil-gas well airlock treatment method has the advantages that technicians or operators can solve the airlock problem at the wellhead, so that normal production of the tight oil-gas well is achieved, and effective time rate is increased by above 50%.
Description
Technical field
The present invention relates to technical field of petroleum extraction, particularly a kind of processing method of fine and close Oil/gas Well gas lock.
Background technology
The fine and close oil gas found in the Dark grey mud stone of deer depression SHAHEJIE FORMATION, oil shale, cream mud stone is restrainted in Ji.Marl cranny development, bearing capacity is low, and oil gas enlivens, and easily leakage occurs in work progress, and after causing pressing crack construction, fracturing fluid can not the row of returning, and gaslift tubing flow displacement success rate is low.Need the tubing pump entered with gas anchor under in well to carry out discharge opeing, oil recovery (gas), but usually cause tubing pump gas lock.
Sun Shuan is published in " development of long plunger ring-sealing gas-tight sand-proof oil pump " literary composition on the 10th phase " petroleum machinery " magazine in 2010 for the deficiency producing vapour lock, gas lock and sand card phenomenon when solving common oil-well pump at present, have developed a kind of novel long plunger ring-sealing gas-tight sand-proof oil pump.This pump adopts long-plunger short pump barrel structure, and its upper end is designed to machinery strong keying gas-tight delivery valve assembly, and seal section adopts the spaced form sand control of ring, compensation metal ring and nonmetallic ring of strike-ofing.The field trial of Daqing oil field shows, this pump can work to high efficient and reliable in the oil well of various oil-gas ratio, and compared with common oil well pump, average pump efficiency improves 15% ~ 20%, and average individual well pump detection period extends more than 90d.
The gases affect problem that the people such as Zhai Xiaodong " long-plunger gas prevention pump is in the use and effect analysis in oil field, ancient city " literary composition be published on the 7th phase in 2011 " western mineral exploration engineering " magazine analyzes oil well pump with long plunger piston and the weak point of several measures taked for this problem at present, propose anti-gas lock cone valve type oil well pump, and describe design and the field trial situation of this oil well pump.Test shows, anti-gas lock cone valve type oil well pump can prevent oil well pump gas lock completely, improves pumping efficiency of oil pump.If with down-hole free gas eliminator and wellhead casing pipe valve discharging gas under certain pressure with the use of, better effect will be obtained.
The people such as Zhang Chundong are published in " the gas-tight technology in oil field development " literary composition on the 9th phase in 2005 " Inner Mongol petrochemical industry " magazine for the administrative purifying in Shengli Oil Field Chun Liang oil recovery factory, great Lu lake, the oil reservoir development present situation of the gassiness blocks such as Gaoqing, give vent to anger gas lock mechanism for theoretical foundation with oil well, launch the investigation to current oilfield gas-tight technology, in conjunction with reality and the present situation of Chun Liang oil recovery factory gassiness block, preferably promote the downhole tool that there is good gas-tight and divide gas effect, not only enrich oil reservoir gas-tight technology, and to the Efficient Development of the high and stable yields improving our factory gassiness block, there is positive contribution.Apply all kinds of gas-tight instrument 7 kinds, implement 438 wells time, to have the data that can contrast for foundation, application gas-tight technology improves oil well individual well pump efficiency 23.6%, accumulatively increases oil 8760 tons, achieves significant oil increasing effect.
These are for the technology preventing gas lock in conventional gas and oil exploitation, and after fine and close Oil/gas Well application, period of validity is short, after fine and close Oil/gas Well gas lock, does not have effective solution.
Summary of the invention
The object of the invention is: the solution providing fine and close Oil/gas Well gas lock, technician or operator just can solve the problem of gas lock at well head, meet the normal production of fine and close Oil/gas Well, and time effective, rate improves more than 50%.Described technical scheme is as follows:
Embodiments provide a kind of processing method of fine and close Oil/gas Well gas lock, described method comprises:
The judgement of gas lock, when well head observes oil pressure gauge 9, back pressure meter 10 at oil pumper up-down stroke, the situation of change of pressure, if oil pressure gauge 9, back pressure meter 10 pointer do not change when oil pumper up-down stroke, down-hole tubing pump there occurs gas lock;
After determining that gas lock occurs, the first step: close the 250 model production tree special valve 4 relying on shaven head 12 to be connected with the little four-way 1 of well head and gathering line 8, when oil pumper runs well, observe the change of oil pressure gauge 9 pressure, when the pressure of oil pressure gauge 9 is greater than back pressure meter 10 pressure 0.5MPa ~ 0.6MPa, open the 250 model production tree special valve 4 that four-way 1 little of well head relies on shaven head 12 to be connected with gathering line 8;
Second step: when oil pressure gauge 9 is equal with the pressure of back pressure meter 10, the repetition first step operates, observe the change of oil pressure gauge 9 pressure, when the pressure of oil pressure gauge 9 is greater than back pressure meter 10 pressure 1.0MPa ~ 1.1MPa, open the 250 model production tree special valve 4 that four-way 1 little of well head relies on shaven head 12 to be connected with gathering line 8;
3rd step: when oil pressure gauge 9 pointer oil pumper up-down stroke fluctuating range is less than 0.4MPa, the repetition first step operates, observe the change of oil pressure gauge 9 pressure, when the pressure of oil pressure gauge 9 is greater than back pressure meter 10 pressure 1.5MPa ~ 2.0MPa, open the 250 model production tree special valve 4 that four-way 1 little of well head relies on shaven head 12 to be connected with gathering line 8;
4th step: when oil pressure gauge 9 pointer oil pumper up-down stroke fluctuating range is less than 0.4MPa, the repetition first step operates, observe the change of oil pressure gauge 9 pressure, when the pressure of oil pressure gauge 9 is greater than back pressure meter 10 pressure 2.0MPa ~ 2.5MPa, open the 250 model production tree special valve 4 that four-way 1 little of well head is connected with gathering line 8; Oil well is normally produced, and oil well gas lock phenomenon solves.
The method that fine and close Oil/gas Well gas lock provided by the invention solves, only need a people just can realize in well head operation, meet the normal production of fine and close Oil/gas Well, time effective, rate improves more than 50%.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of production tree device that the embodiment of the present invention provides.
Reference numeral:
The little four-way of 1-well head, 2-rubber valve, 3-250 type production tree special valve, 4-250 type production tree special valve, 5-250 type production tree special valve, 6-well head big four, 7-back pressure valve, 8-gathering line, 9-oil pressure gauge, 10-back pressure meter, 11-bushing, 12-shaven head, 13-shaven head.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Restrainting 1 well is example, further describes the solution of a kind of fine and close Oil/gas Well gas lock of the present invention.
Accompanying drawings 1.The solution of a kind of fine and close Oil/gas Well gas lock of the present invention, comprising: the little four-way 1 of well head, rubber valve 2,250 model production tree special valve 3,250 model production tree special valve 4,250 model production tree special valve 5, well head big four 6, back pressure valve 7, gathering line 8, oil pressure gauge 9, back pressure meter 10, bushing 11, shaven head 12, shaven head 13.
1, the judgement of gas lock.When the well head of bundle 1 well observes oil pressure gauge, back pressure meter at oil pumper up-down stroke, the situation of change of pressure, if oil pressure gauge, back pressure meter pointer do not change when oil pumper up-down stroke, down-hole tubing pump there occurs gas lock;
2, the solution of gas lock.
The first step: close the 250 model production tree special valve 4 be connected with gathering line 8 shaven head 13 with the little four-way 1 of well head, when oil pumper runs well, observe the change of oil pressure gauge 9 pressure, when the pressure of oil pressure gauge 9 is greater than back pressure gauge pressure 10 power 0.5MPa ~ 0.6MPa, open the 250 model production tree special valve 4 that four-way 1 little of well head is connected with gathering line 8 shaven head 13
Second step: when oil pressure gauge 9 is equal with the pressure of back pressure meter 10, the repetition first step operates, observe the change of oil pressure gauge pressure, when the pressure of oil pressure gauge is greater than back pressure meter pressure 1.0MPa ~ 1.1MPa, open the 250 model production tree special valve 4 that four-way 1 little of well head is connected with gathering line 8 shaven head 13
3rd step: when oil pressure gauge 9 pointer oil pumper up-down stroke fluctuating range is less than 0.4MPa, the repetition first step operates, observe the change of oil pressure gauge 9 pressure, when the pressure of oil pressure gauge 9 is greater than back pressure meter 10 pressure 1.5MPa ~ 2.0MPa, open the 250 model production tree special valve 4 that four-way 1 little of well head is connected with gathering line 8 shaven head 13
4th step: when oil pressure gauge 9 pointer oil pumper up-down stroke fluctuating range is less than 0.4MPa, the repetition first step operates, observe the change of oil pressure gauge 9 pressure, when the pressure of oil pressure gauge 9 is greater than back pressure meter 10 pressure 2.0MPa ~ 2.5MPa, open the 250 model production tree special valve 4 that four-way 1 little of well head is connected with gathering line 8 shaven head 13, oil well is normally produced, and oil well gas lock phenomenon solves.Meet the normal production of fine and close Oil/gas Well, when the oil well production adopting gas lock processing method provided by the present invention like this to carry out producing is effective, rate hinge structure is greatly improved, wherein, the time rate of fluid when rate refers to oil well production during oil well effective, oil well day liquid outlet quantity divided by rate when can to obtain oil well effective for 24 hours.Through actual measuring and calculating, when the oil well adopting gas lock processing method provided by the present invention like this to carry out producing is effective, rate improves 54.5%.
The described 250 model production tree special valve 3 be connected with oil pressure gauge 9 is in normally open all the time;
The little four-way 1 of described well head relies on clip to be connected with 250 model production tree special valve 3,250 model production tree special valve 4,250 model production tree special valve 5; Described 250 model production tree special valve 3 relies on clip to be connected with shaven head 12; Described bushing 11 relies on screwed connection with shaven head 12; Described oil pressure gauge 9 relies on screwed connection in bushing 11;
Described 250 model production tree special valve 5 relies on clip to be connected with well head big four 6;
Described 250 model production tree special valve 4 relies on clip to be connected with shaven head 13;
Described back pressure meter 13 is connected on gathering line 8; The diameter of described gathering line 8 is 50mm;
Described back pressure valve 7 for diameter be the ball valve of 50mm, commercially available;
Described back pressure meter 10, oil pressure gauge 9 range are 6.0MPa, commercially available;
Described 250 model production tree special valve 3,250 model production tree special valve 5, rubber valve 2 are in normally open all the time;
Described 250 model production tree is oil Special wellhead, commercially available.
Described 250 model production tree special valve 3,250 model production tree special valve 4,250 model production tree special valve 5, rubber valve 2, the little four-way 1 of well head, well head big four 6, shaven head 12, shaven head 13, bushing 11 are oil field special equipment, commercially available.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (1)
1. a processing method for fine and close Oil/gas Well gas lock, is characterized in that, described method comprises:
The judgement of gas lock, when well head observes oil pressure gauge (9), back pressure meter (10) at oil pumper up-down stroke, the situation of change of pressure, if oil pressure gauge (9), back pressure meter (10) pointer do not change when oil pumper up-down stroke, down-hole tubing pump there occurs gas lock;
After determining that gas lock occurs, the first step: close the 250 model production tree special valve (4) relying on shaven head (12) to be connected with the little four-way of well head (1) and gathering line (8), when oil pumper runs well, observe the change of oil pressure gauge (9) pressure, when the pressure of oil pressure gauge (9) is greater than back pressure meter (10) pressure 0.5MPa ~ 0.6MPa, open the 250 model production tree special valve (4) that four-way (1) little of well head relies on shaven head (12) to be connected with gathering line (8);
Second step: when oil pressure gauge (9) is equal with the pressure (10) of back pressure meter, the repetition first step operates, observe the change of oil pressure gauge (9) pressure, when the pressure of oil pressure gauge (9) is greater than back pressure meter (10) pressure 1.0MPa ~ 1.1MPa, open the 250 model production tree special valve (4) that four-way (1) little of well head relies on shaven head (12) to be connected with gathering line (8);
3rd step: when oil pressure gauge (9) pointer oil pumper up-down stroke fluctuating range is less than 0.4MPa, the repetition first step operates, observe the change of oil pressure gauge (9) pressure, when the pressure of oil pressure gauge (9) is greater than back pressure meter (10) pressure 1.5MPa ~ 2.0MPa, open the 250 model production tree special valve (4) that four-way (1) little of well head relies on shaven head (12) to be connected with gathering line (8);
4th step: when oil pressure gauge (9) pointer oil pumper up-down stroke fluctuating range is less than 0.4MPa, the repetition first step operates, observe the change of oil pressure gauge (9) pressure, when the pressure of oil pressure gauge (9) is greater than back pressure meter (10) pressure 2.0MPa ~ 2.5MPa, open the 250 model production tree special valve (4) that four-way (1) little of well head is connected with gathering line (8); Oil well is normally produced, and oil well gas lock phenomenon solves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410458787.6A CN105464625B (en) | 2014-09-10 | 2014-09-10 | A kind of processing method of fine and close Oil/gas Well gas lock |
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| CN201410458787.6A CN105464625B (en) | 2014-09-10 | 2014-09-10 | A kind of processing method of fine and close Oil/gas Well gas lock |
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| CN105464625A true CN105464625A (en) | 2016-04-06 |
| CN105464625B CN105464625B (en) | 2018-02-02 |
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Citations (4)
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| US5015151A (en) * | 1989-08-21 | 1991-05-14 | Shell Oil Company | Motor controller for electrical submersible pumps |
| CN2346927Y (en) * | 1997-04-02 | 1999-11-03 | 胜利石油管理局临盘采油厂采油二矿 | Producing well technical combined valve |
| CN203145896U (en) * | 2012-11-29 | 2013-08-21 | 中国石油化工股份有限公司 | Oil field oil well CO2 airlock prevention flow string |
| CN104074494A (en) * | 2014-07-16 | 2014-10-01 | 檀长江 | Combined-type oil well casing gas recovery device |
-
2014
- 2014-09-10 CN CN201410458787.6A patent/CN105464625B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5015151A (en) * | 1989-08-21 | 1991-05-14 | Shell Oil Company | Motor controller for electrical submersible pumps |
| CN2346927Y (en) * | 1997-04-02 | 1999-11-03 | 胜利石油管理局临盘采油厂采油二矿 | Producing well technical combined valve |
| CN203145896U (en) * | 2012-11-29 | 2013-08-21 | 中国石油化工股份有限公司 | Oil field oil well CO2 airlock prevention flow string |
| CN104074494A (en) * | 2014-07-16 | 2014-10-01 | 檀长江 | Combined-type oil well casing gas recovery device |
Non-Patent Citations (2)
| Title |
|---|
| 任今明等: "抽油机井井口气锁原因分析及解决办法", 《新疆石油天然气》 * |
| 张春栋等: "油田开发中的防气技术", 《内蒙古石油化工》 * |
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