CN103590768B - Treatment method for abandoned uncased wells in coal mining area - Google Patents
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- CN103590768B CN103590768B CN201310559782.8A CN201310559782A CN103590768B CN 103590768 B CN103590768 B CN 103590768B CN 201310559782 A CN201310559782 A CN 201310559782A CN 103590768 B CN103590768 B CN 103590768B
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Abstract
The invention provides a treatment method for abandoned uncased wells in a coal mining area. The treatment method comprises the four steps of well-mouth recovery, well unblocking and sweeping, well logging and three-section plugging. By means of the treatment of the abandoned oil and gas uncased wells in the coal mining area, as for each abandoned uncased well, about 100 thousands of tons of accumulated coal can be released, and direct economic loss of more than 50-million yuan can be reduced. In addition, by effectively treating the abandoned oil and gas uncased wells in the method, oil and gas leakage and various potential safety hazards are also avoided during mining, and various types of loss caused by movement are reduced.
Description
Technical field
The present invention relates to the management domain of Oil/gas Well, particularly to a kind of before mining in discarded Oil/gas Well area to discard
The administering method of oil gas open hole well.
Background technology
The exploration and development of coal in China and petroleum gas is the energy industry system separate by two：Coal system
Independently undertake with petroleum gas system.Because coal and petroleum gas are each imbedded in the objective preservation bar of underground
Part difference and territorial characteristics, general coal seam is in underground shallow part, and deep below 1000 meters of underground for the oil-gas Layer, coal is occurring
Layer and some areas of oil and gas field layer overlap, mutually have a great impact to exploitation each other.Generally, open respective
Adopt in planning and designing, both sides take quarantine measures, colliery sets isolated coal pillar in the certain limit in close oil field, do not exploit
Coal deposits in the range of oil field after isolated coal pillar.Also kept at a distance with colliery in oil field as far as possible.In coal mining design according to
Pertinent regulations reserve large area barrier pillar and can not exploit, in addition the whole ore deposit in colliery having will due to oilfield exploitation or its leave
Problem putting off development, even do not develop, great waste is caused for development of resources.Wherein, phase in these discarded Oil/gas Wells
When a part belongs to open hole well, its Crack cause due to not getting to target zone, is abandoned halfway or is beaten mainly during well-digging
To target zone but oil/gas show is weak for well, no extraction value, and drilling well troop does not enter production casing down, directly discards.The spy of open hole well
Putting is：1st, under normal circumstances, in such pit shaft, oil gas stressor layer is little, but is produced Oil/gas Well water injection pressure by periphery and affected, ground
Stressor layer may be stepped up；2nd, due to not entering down production casing, cave-in and drilling mud deposit the middle and lower part making pit shaft
Blocked closely knit, drifting difficulty is larger；3rd, uncased wellbore no production casing intercepts, and such as there is artesian aquifer in stratum, should
Pit shaft, as conduit pipe direct UNICOM coal mine down-hole tunnel, threatens greatly to Safety of Coal Mine Production.Such useless near colliery
Abandon the oil and gas leakage of oil gas open hole well, the water in water layer along oil well enter colliery the problems such as, be to cause overlapping Areas For Coal great
One of immediate causes of accident potential such as fire, blast, toxic and harmful and water damage, for colliery normal design, produce band
Great inconvenience and potential safety hazard are come, the exploitation in colliery simultaneously will also result in certain safe prestige to the Oil/gas Well producing
The side of body.The coal column pressure coal of liberation flood tide, improves coal resources utilization rate it is ensured that the doulbe-sides' victory of coal and Oil Safety environmental protection and economy is developed
Become major issue anxious to be resolved in industry.
Content of the invention
In order to solve the above problems, the present invention provides a kind of underground coal money overlapping with oil gas field for safety economy exploitation
Source, the method effectively administering discarded open hole well in the range of the field with "nine squares" of colliery, to guarantee channel of coal mining working surface safety Oil/gas Well,
And prevent to occur oil gas leakage to cause environmental pollution accident.The present invention is directed to and does not carry out oil-gas mining, no production casing in pit shaft
Isolation, the open hole well that discarded rear spontaneous corrosion effect is obvious, situation is complicated, concrete administering method comprises the steps：
(A) recover well head；
(B) through wash well：Drifting and mud deposition section are disposed and well-flushing；
(C) log well：Obtain oil-gas Layer position and formation information and the oil gas such as pressure, water layer position and pressure, coal seam position
The casing programme data such as well well depth, hole deviation；
(D) three-stage closure：First paragraph, the oil-gas Layer closure of bore hole well shaft bottom section, insulate oil gas；Second segment, pit shaft
Stage casing blocks, and pressure is checked and accepted；3rd section；Surface pipe and well head closure.
Wherein, step (B) specifically includes following two steps：
（1）Drifting and mud deposition section are disposed：With drifting vehicle in normal pressures（4MPa about：3.5-4.5MPa）Lower boring is ground
Drifting.Because open hole well is typically due to cave-in and drilling mud residual can deposit thicker mud cake, drifting in pit shaft
Difficulty is big, bit freezing, top brill accident easily occurs it is therefore desirable to judge according to site operation during drifting, when running in pit shaft
Deposit thicker mud cake, drifting difficulty is big, when drilling rod reversion, back attack phenomenon occur, exchange to bore for scraper and mud cake is smashed,
Meanwhile, cementing truck pressure is increased to 5～6MPa, make the mud smashed take ground out of by drifting circulation fluid；
（2）Well-flushing：Drifting to desired depth, under enter to cover washing cylinder and instrument oil pipe, with cementing truck by clear water by under pit shaft
Portion's closed section starts, and rinses back and forth paragraph by paragraph, till flushing liquor that aperture is returned out does not contaminate handss.
Wherein, step (D) specifically includes following four steps：
（1）Oil-gas Layer blocks：Prepare 10% HTYT-1 High hydrophilous resin granule, squeeze, to wellbore bottom, the note that this configures
Plugging material；
（2）Well wellbore stage casing blocks：
1. inject cement mortar：It is configured to the cement mortar of density >=1.82Kg/L with oil-well cement, by instrument oil pipe from well
Bottom is returned and is noted to well head, Hou Ning 72 hours；
2. pressure is checked and accepted：Use cementing truck pressure testing, verify plugging effect, press 15Mpa, and in 30 minutes, pressure drop is less than
0.5Mpa is qualified, if pressure drop is more than 0.5Mpa, injects low-viscosity high-strength gel plugging material（As：Amphion
Frozen glue profile control agent）, Hou Ning, after 24 hours, tests pressure again, until pressure is not only reduced to；
（3）Surface pipe and well head closure：Dial-out utility oil pipe, discharges well head, prepares the common of density >=1.82Kg/L
The full surface pipe of cement mortar tank and pit shaft；（3）Beat 0.5m × 0.5m × 0.5m clump above well head, clump is indicated on face
Pound sign and shut-in well date, recover well site landforms.
Beneficial effect：
Through the above-mentioned improvement to coal mining region abandoned oil gas open hole well, every mouthful of abandoned well solution can bleed off pressure coal amount 10
Ten thousand tons about, reduce more than 5,000 ten thousand yuan of direct economic loss.Additionally, by the method for the present invention to having that discarded Oil/gas Well is carried out
Effect improvement also avoid the various potential safety hazards such as oil gas leakage in exploitation, decreases the every loss causing because of removal of home stopping surface.
Current oil-gas mining mostly takes water filling to keep stratum energy production technique, is in the discarded oil gas of the same area
, when coal mining is passed through, there are hydraulic oil, the major safety risks of gas and water leakage in well.It may happen that oil gas quick-fried
Fried, toxic and harmful, water etc. invade the major security threat such as tunnel.These safety can be reduced by administering to greatest extent
Hidden danger.Provide reliable guarantee for safety in production, simultaneously can also reclaiming coal resource to greatest extent.
Brief description
The underground structure schematic diagram of the administering method of open hole well discarded by accompanying drawing 1 for the present invention.
Wherein, A is topsoil；B is coal seam；C is artesian aquifer；D is oil-gas Layer；
1 is bore hole well shaft；2 is cement；3 is High hydrophilous resin granule.
Specific embodiment
With reference to specific embodiment, to the present invention, the discarded Oil/gas Well administering method work in coal mining region is more detailed
Most explanation.And protection scope of the present invention is not intended to be limited to implementation below.The ordinary skill of described technical field
Personnel, according to above the disclosure, all can achieve the purpose of the present invention.
It is specific as follows that XX ore deposit abandoned well open hole well administers implementation steps：
Preparation of construction
1. repair passway, be easy to drifting Operation Van and pass through.
2. drifting troop prepares
1. drifting vehicle one, 700 type cementing trucks are a set of, more than instrument oil pipe 1200m；
2. Ф 73mm beveled tip 1；
3. high-pressure fire hose, elbow, joint are on deck, flexibly handy；
4. 15 tons of oil-well cement, HTYT-1 High hydrophilous resin granule；
5. yb-250 well head is a set of；
6. instrument and fire-fighting equipment are pressed normal construction and are needed on deck；
7. Ф 100 screw drill is a set of, Ф 118 tricone bit one, and Ф 118 scraper bores one, 190 sets of washing cylinders of Ф；
8. 60m is excavated in well site3Blowdown cheat one.
Concrete steps：
(A) recover this abandoned well well head, and yb-250 well head is installed；
(B) through wash well
（1）Drifting and mud deposition section are disposed：With drifting vehicle, using Ф 118 tricone bit and Ф 100 screw drill, bore
Mill drifting.Because open hole well is typically due to cave-in and drilling mud residual can deposit thicker mud cake in pit shaft, lead to
Well difficulty is big, bit freezing, top brill accident easily occurs it is therefore desirable to when drilling rod reversion, back attack phenomenon during drifting, exchange
For drill bits such as Ф 118 scraper brill, Ф 73mm beveled tips, mud cake is smashed, meanwhile, 700 type cementing truck pressure are increased to 5～
6MPa, makes the mud smashed take ground out of by drifting circulation fluid；
（2）Well-flushing：Drifting to desired depth, under enter 190 sets of washing cylinders of Ф and instrument oil pipe, will be clear with 700 type cementing trucks
Water, by lower wellbore closed section, rinses paragraph by paragraph back and forth, till flushing liquor that aperture is returned out does not contaminate handss.
(C) log well
Carry out engineering log, the dependency number such as admission reservoir depth, coal seam depth, water layer and casing programme with engineering logging truck
According to.
(D) block（Three-stage blocks）
（1）Oil-gas Layer blocks
Prepare 10% HTYT-1 High hydrophilous resin granule with cementing truck hopper, inject, to wellbore bottom, the note that this configures
Plugging material, this resin material imbibition plays soft seal effect to oil gas interval, insulates oil gas；
（2）Well wellbore stage casing blocks
1. inject cement mortar：With cementing truck, the oil-well cement bought is configured to the cement mortar of density >=1.82Kg/L, leads to
Cross instrument oil pipe and return note to well head, Hou Ning 72 hours from shaft bottom, realize the closure to oil reservoir pit shaft stage casing.
2. pressure is checked and accepted：With 700 type cementing truck pressure testings, verify plugging effect, press 15Mpa, pressure drop in 30 minutes
It is qualified less than 0.5Mpa, if pressure drop is more than 0.5Mpa, inject amphion frozen glue profile control agent as plugging material,
After Hou Ning 24 hours, again test pressure, until pressure is not only reduced to；
（3）Surface pipe and well head closure：Dial-out utility oil pipe, discharges well head, prepares the common of density >=1.82Kg/L
The full surface pipe of cement mortar tank and pit shaft；Beat 0.5m × 0.5m × 0.5m clump above well head, clump indicates well on face
Number and the shut-in well date, recover well site landforms.
The scheme that above-mentioned embodiment is recorded can be applied not only to the abandoned oil open hole well in coal mining area, gas bore hole
Well, is applied equally to oil-gas mining unit to discarded open hole well environment protection treating etc..
Claims (3)
1. a kind of useless open hole well administering method in coal mining region is it is characterised in that the method comprises the steps：
(A) recover well head；
(B) through wash well：Drifting and mud deposition section are disposed and well-flushing；
(C) log well：Obtain oil-gas Layer position and pressure, water layer position and pressure, coal seam position formation information and Oil/gas Well well depth,
Hole deviation casing programme data；
(D) three-stage closure：First paragraph, the oil-gas Layer closure of bore hole well shaft bottom section, insulate oil gas；Second segment, pit shaft stage casing
Closure, and pressure examination；3rd section；Surface pipe and well head closure；
Wherein, step (D) specifically includes following four steps：
(1) oil-gas Layer closure：Prepare 10% HTYT-1 High hydrophilous resin granule, the closure material having configured to wellbore bottom injection
Material；
(2) well wellbore stage casing closure：
1. inject cement mortar：It is configured to the cement mortar of density >=1.82Kg/L with oil-well cement, returned from shaft bottom by instrument oil pipe
Note to well head, Hou Ning 72 hours；
2. pressure is checked and accepted：Use cementing truck pressure testing, verify plugging effect, press 15Mpa, and in 30 minutes, pressure drop is less than
0.5Mpa is qualified, if pressure drop is more than 0.5Mpa, injects amphion frozen glue profile control agent plugging material, Hou Ning 24 hours
Afterwards, again test pressure, until pressure is not only reduced to；
(3) surface pipe and well head closure：Dial-out utility oil pipe, discharges well head, prepares the ordinary cement of density >=1.82Kg/L
The full surface pipe of slurry tank and pit shaft；(4) beat 0.5m × 0.5m × 0.5m clump above well head, clump indicates pound sign on face
With shut-in well date, recovery well site landforms.
2. the useless open hole well administering method in coal mining region according to claim 1 is it is characterised in that step (B) has
Body includes following two steps：
(1) drifting and mud deposition section are disposed：Bore mill drifting under normal pressures, deposit thicker mud cake in pit shaft when running into,
Drifting difficulty is big, when drilling rod reversion, back attack phenomenon, exchanges and for drag bit, mud cake is smashed, meanwhile, pressure increases to
5-6MPa, makes the mud smashed take ground out of by drifting circulation fluid；
(2) well-flushing：Drifting to desired depth, under enter to cover washing cylinder and instrument oil pipe, with cementing truck, clear water is sealed by lower wellbore
Close section to start, rinse back and forth paragraph by paragraph, till flushing liquor that aperture is returned out does not contaminate handss.
3. the useless open hole well administering method in coal mining region according to claim 2 is it is characterised in that described routine is pressed
Power is 3.5-4.5MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310559782.8A CN103590768B (en) | 2013-11-12 | 2013-11-12 | Treatment method for abandoned uncased wells in coal mining area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310559782.8A CN103590768B (en) | 2013-11-12 | 2013-11-12 | Treatment method for abandoned uncased wells in coal mining area |
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| Publication Number | Publication Date |
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| CN103590768A CN103590768A (en) | 2014-02-19 |
| CN103590768B true CN103590768B (en) | 2017-02-15 |
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| CN201310559782.8A Expired - Fee Related CN103590768B (en) | 2013-11-12 | 2013-11-12 | Treatment method for abandoned uncased wells in coal mining area |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104153731B (en) * | 2014-07-11 | 2016-05-25 | 东营市华翰石油技术开发有限公司 | A kind of well drilling waste mud reuse water plugging and profile controlling process |
| CN106014330B (en) * | 2016-06-27 | 2019-05-07 | 中国石油天然气股份有限公司 | A method of improving leakage casing damaged well chemical plugging success rate |
| CN107420127B (en) * | 2017-08-10 | 2018-03-27 | 中节能宁夏新能源股份有限公司 | A kind of discarded coal mine ground destressing borehole gas control new technology |
| CN108331573B (en) * | 2017-12-22 | 2021-03-26 | 神华宁夏煤业集团有限责任公司 | Waste oil well treatment method for coal mining area |
| CN109057747A (en) * | 2018-08-02 | 2018-12-21 | 中国海洋石油集团有限公司 | Four, which open time deep water naked eye, completes the method that well is thrown aside safely |
| CN109372465A (en) * | 2018-09-29 | 2019-02-22 | 中国石化江汉油田分公司江汉采油厂 | A kind of method for blocking for empty well cylinder abandoned well |
| CN109779606A (en) * | 2018-12-27 | 2019-05-21 | 中国地方煤矿有限公司 | A kind of hazard prediction method in oil/gas well approaches the working surface mining active process |
| CN112145146A (en) * | 2020-10-15 | 2020-12-29 | 西安科技大学 | Method for exploring inclined columnar danger source in kerosene overlapping area |
| CN112709565B (en) * | 2021-01-27 | 2022-07-29 | 国家能源集团宁夏煤业有限责任公司双马煤矿 | Method for determining plugging depth of waste petroleum well in coal mining area |
| CN114322927A (en) * | 2021-12-28 | 2022-04-12 | 四川盐业地质钻井大队 | Rock salt water-soluble mine ground settlement advanced monitoring method |
| CN114961632B (en) * | 2022-04-24 | 2023-01-24 | 中国石油天然气集团有限公司 | Underground three-level environment-friendly treatment method for difficult and complicated well |
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|---|---|---|---|---|
| CN1548700A (en) * | 2003-05-13 | 2004-11-24 | 军 金 | Plugging technology of high infiltration layer |
| CN1664306A (en) * | 2005-02-23 | 2005-09-07 | 胡振起 | Method for redevelopment of junked drowned oil field |
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| CN103244071A (en) * | 2012-02-09 | 2013-08-14 | 中国石油天然气股份有限公司 | Method for plugging old underground gas storage well |
Family Cites Families (2)
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|---|---|---|---|---|
| US7111685B2 (en) * | 2003-07-25 | 2006-09-26 | Schlumberger Technology Corporation | Downhole sampling apparatus and method |
| WO2011149597A1 (en) * | 2010-05-26 | 2011-12-01 | Exxonmobil Upstream Research Company | Assembly and method for multi-zone fracture stimulation of a reservoir using autonomous tubular units |
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Patent Citations (4)
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|---|---|---|---|---|
| CN1548700A (en) * | 2003-05-13 | 2004-11-24 | 军 金 | Plugging technology of high infiltration layer |
| CN1664306A (en) * | 2005-02-23 | 2005-09-07 | 胡振起 | Method for redevelopment of junked drowned oil field |
| CN101387193A (en) * | 2007-09-13 | 2009-03-18 | 西部钻探克拉玛依钻井工艺研究院 | Oil and gas well cementation and completion method |
| CN103244071A (en) * | 2012-02-09 | 2013-08-14 | 中国石油天然气股份有限公司 | Method for plugging old underground gas storage well |
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