CN102251752A - First-relief and then-pressure well control process for petroleum drilling - Google Patents
First-relief and then-pressure well control process for petroleum drilling Download PDFInfo
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- CN102251752A CN102251752A CN2011101730135A CN201110173013A CN102251752A CN 102251752 A CN102251752 A CN 102251752A CN 2011101730135 A CN2011101730135 A CN 2011101730135A CN 201110173013 A CN201110173013 A CN 201110173013A CN 102251752 A CN102251752 A CN 102251752A
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- well
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- 238000005553 drilling Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000003208 petroleum Substances 0.000 title abstract 3
- 239000012530 fluid Substances 0.000 claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 230000002159 abnormal effect Effects 0.000 claims abstract description 8
- 238000005516 engineering process Methods 0.000 claims description 23
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000003129 oil well Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000008398 formation water Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
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Abstract
The invention discloses a first pressure relief and then pressure control process for petroleum drilling, wherein in the process of drilling, under the condition that the fluid invading a shaft is water, a drilling tool is lowered to the bottom of a well, a flat valve IV of a ground well control device is opened, a semi-closed flashboard of the ground well control device is closed, the fluid in the well is controlled to gradually flow outwards by adjusting the opening degree of a throttle valve, the pressure of an abnormal high-pressure water layer is reduced, and the pressure relief process is completed; and calculating the density value of the well killing fluid required for balancing the pressure value according to the pressure value of a vertical pressure gauge on the ground well control device, adding a safety additional value of 0.05-0.10 g/cm3, adding the density value of the well killing fluid and the safety additional value to obtain a target value of the density of the well killing fluid, preparing the well killing fluid with the quantity equivalent to the volume of the whole well barrel according to the target value, and injecting the well killing fluid into the shaft at one time to finish the well killing process. The method can not only fundamentally reduce the well blowout hazard in the petroleum drilling process, but also greatly reduce the labor intensity of personnel and the material consumption.
Description
Technical field
The technology of control bottom pressure when the present invention relates to run into the abnormal pressure water layer in a kind of Process of Oil Well Drilling.
Background technology
At present, bore when meeting the abnormal pressure water layer in Process of Oil Well Drilling, the technology of taking usually to improve drilling fluid density is checked stratum continuation water outlet.
As Ai Guicheng, Niu Chun, Li Jing, Jiajun LI and Wang Baocheng, having delivered one piece of autograph on the periodical file of periodical " drilling fluid and completion fluid " by name is " research and the application of high density low-viscosity cation drilling liquid technology " periodical literature, the date issued of this periodical literature is the 24th the 6th phase of volume of November in 2007, the 5.3rd joint has related to the control technology at high pressured slatwater layer in the document, particular content is that the Jiu Dong oil field employs prevention is main, the pressure bridging is closed, Ning Chong is not light, rather oozes the method that does not go out.According to the offset well geologic information, before bore meeting the high pressured slatwater layer that may exist, progressively drilling fluid density is increased to safe density, to press the stable high-pressure brine layer, do not allow its water outlet; When the sandstone formation of well section creeps into before high pressured slatwater layer, add a certain amount of drill-feeding plugging agent, calcium carbonate superfine powder and sulfonated gilsonite dry powder,, avoid the leakage when brill chance high pressured slatwater layer increases the weight of to improve the bearing capacity on stratum.Be strict with the measurement of sitting hilllock and property of drilling fluid, accomplish early to find, early handle.Keep drilling fluid low bentonite content, be beneficial to add heavy weight additive after brill is met the high pressure water layer.After overflow took place, kill-job is success once, reduced the immersion of salt solution to upper formation.
Above-mentioned technology is common practice of the prior art, and this technology needs higher well killing fluid density in implementation process, need great amount of manpower and material resources, and makes well top weak formation generation leakage easily, causes the kill-job failure.
Summary of the invention
For solving the well killing fluid density requirement height of above-mentioned existing well control technology, the human and material resources demand is big, the technical problem of upper wellbore weak formation leakiness, the invention provides a kind of back kill-job control technology of letting out earlier, this technology can not only fundamentally reduce the blowout harm in the Process of Oil Well Drilling, can also greatly reduce personnel labor intensity and goods and materials expend.
The present invention realizes by adopting following technical proposals:
A kind of oil drilling is let out back kill-job control technology earlier, it is characterized in that:
Running into the intrusion wellbore fluids in drilling process is under the situation of water, with drilling tool down to the shaft bottom, open the flap type four of ground well control device, that closes the ground well control device partly seals flashboard, by regulating the opening degree size of choke valve, the control well inner fluid progressively outflows, and reduces the abnormal pressure aquifer pressure, finishes and rushes down compression technology;
Again according to the required well killing fluid density value of this force value of vertical-fracture meter force value calculated equilibrium on the well control device of ground, and the safe added value of additional 0.05～0.10g/cm3, well killing fluid density value and described safe added value addition are obtained the desired value of well killing fluid density, the well killing fluid that is equivalent to full pit shaft volume according to described desired value configuration quantity, disposable injection pit shaft is finished well kill-job technology.
Describedly rush down compression technology more particularly: with the flap type one of ground well control device with partly seal flashboard and close, flap type three, flap type four, second flap type, Siping City's plate valve and the 5th flap type are opened, the pit shaft inner fluid flows out by the ground well control device, adjust the size of choke valve opening degree, adjust force value shown on the casing pressure table one, release strata pressure.
Compared with prior art, beneficial effect of the present invention shows:
The present invention makes full use of existing ground well control device, do not stop notes, pressure release and underground fracture construction finding out the contiguous high-pressure water injection well that exists, judge that in conjunction with reservoir invading wellbore fluids is under the situation of water, by operation drilling tool and ground well control device, finish and rush down the technology of pressing the back kill-job earlier, avoided the poor efficiency construction of existing well control technology mid-early stage kill-job, fundamentally reduced the blowout harm in the Process of Oil Well Drilling, greatly reduce personnel labor intensity and goods and materials expend, improved the kill-job one-time success rate.
Description of drawings
The present invention is described in further detail below in conjunction with specification drawings and specific embodiments, wherein:
Well control device schematic diagram in ground when Fig. 1 is pressure release
The pit shaft inner fluid flowed to schematic diagram when Fig. 2 was pressure release
Well control device schematic diagram in ground when Fig. 3 is closing well
Interior bottom pressure of pit shaft and strata pressure balance schematic diagram when Fig. 4 is closing well
Mark among the figure:
1
#, flap type one, 2
#, flap type two, 3
#, flap type three, 4
#, flap type four, J
1 #, control valve, J
2 #, second flap type, J
3 #, the 3rd flap type, J
4 #, Siping City's plate valve, J
5 #, the 5th flap type, J
6 #, the 6th flap type, 5, casing pressure table one, 6, casing pressure table two, 7, vertical-fracture meter, 8, drilling rod, 9, partly seal flashboard, 10, the abnormal pressure water layer, 11, the normal pressure water layer, on, open state, off, off status.
The specific embodiment
The invention discloses a kind of oil drilling and let out back kill-job control technology earlier: do not stop notes, pressure release and underground fracture construction finding out the contiguous high-pressure water injection well that exists, judge that in conjunction with reservoir invading wellbore fluids is under the situation of water, drilling tool opens 4 down to the shaft bottom
#Valve is closed half envelope flashboard, and by regulating the opening degree size of choke valve J1, the control well inner fluid progressively outflows, and reduces the abnormal pressure aquifer pressure.According to the required well killing fluid density value of this pressure of vertical-fracture meter force value calculated equilibrium, add 0.05～0.10g/cm again
3Safe added value, itself and be the desired value of well killing fluid density.Dispose the well killing fluid that quantity is equivalent to full pit shaft volume according to this target density value, disposable injection pit shaft reaches the purpose of controlling water enchroachment (invasion).Of particular note, the ground well control device is the universal product of this area.
In Fig. 1,1# flap type and partly seal flashboard and close 3
#, 4
#, J
2 #, J
4 #, J
5 #Flap type is opened, and the pit shaft inner fluid by adjusting the size of choke valve J1 opening degree, is adjusted force value shown on the casing pressure table 1 according to passing through the ground well control device shown in the dotted arrow, releases strata pressure reposefully.In Fig. 2, abnormal pressure formation water and pit shaft inner fluid flow to ground according to shown in the arrow from the shaft bottom.In Fig. 3,1
#, J
2 #Flap type and partly seal flashboard and cut out forms a trap, and the pit shaft inner fluid can't find an exit from ground, and casing pressure table 1 shows that the pit shaft inner fluid acts on the pressure on the well-control equipment of ground, kill-job success when this force value equals 0.In Fig. 4, fluid column fluid pressure and strata pressure equal and opposite in direction in the pit shaft, oppositely opposite, formation water can't continue to invade in the well.
Claims (2)
1. an oil drilling is let out back kill-job control technology earlier, it is characterized in that:
Running into the intrusion wellbore fluids in drilling process is under the situation of water, with drilling tool down to the shaft bottom, open the flap type four of ground well control device, that closes the ground well control device partly seals flashboard, by regulating the opening degree size of choke valve, the control well inner fluid progressively outflows, and reduces the abnormal pressure aquifer pressure, finishes and rushes down compression technology;
Again according to the required well killing fluid density value of this force value of vertical-fracture meter force value calculated equilibrium on the well control device of ground, and the safe added value of additional 0.05～0.10g/cm3, well killing fluid density value and described safe added value addition are obtained the desired value of well killing fluid density, the well killing fluid that is equivalent to full pit shaft volume according to described desired value configuration quantity, disposable injection pit shaft is finished well kill-job technology.
2. oil drilling according to claim 1 is let out back kill-job control technology earlier, it is characterized in that: describedly rush down compression technology more particularly: with the flap type one of ground well control device with partly seal flashboard and close, flap type three, flap type four, second flap type, Siping City's plate valve and the 5th flap type are opened, the pit shaft inner fluid flows out by the ground well control device, adjust the size of choke valve opening degree, adjust force value shown on the casing pressure table one, release strata pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101730135A CN102251752A (en) | 2011-06-24 | 2011-06-24 | First-relief and then-pressure well control process for petroleum drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101730135A CN102251752A (en) | 2011-06-24 | 2011-06-24 | First-relief and then-pressure well control process for petroleum drilling |
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| CN102251752A true CN102251752A (en) | 2011-11-23 |
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| CN2011101730135A Pending CN102251752A (en) | 2011-06-24 | 2011-06-24 | First-relief and then-pressure well control process for petroleum drilling |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108204223A (en) * | 2016-12-19 | 2018-06-26 | 中国石油天然气股份有限公司 | Brine layer pressure relief method |
| CN105672927B (en) * | 2014-11-21 | 2019-04-05 | 中石化胜利石油工程有限公司钻井工艺研究院 | A kind of well killing method after gas drilling blowout |
| CN111236868A (en) * | 2020-03-19 | 2020-06-05 | 中国石油天然气集团有限公司 | Plugging method for well drilling overflow water outlet channel |
| CN111535771A (en) * | 2020-05-11 | 2020-08-14 | 中石化石油工程技术服务有限公司 | Blowout preventer emergency shutdown control system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101037929A (en) * | 2007-04-06 | 2007-09-19 | 无锡浩安科技发展有限公司 | Well drilling blowout prevention killing well joint |
| WO2008058209A2 (en) * | 2006-11-07 | 2008-05-15 | Halliburton Energy Services, Inc. | Offshore universal riser system |
| CN201661272U (en) * | 2009-09-23 | 2010-12-01 | 中国石油化工集团公司 | Automatic blowout well killing control device |
-
2011
- 2011-06-24 CN CN2011101730135A patent/CN102251752A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008058209A2 (en) * | 2006-11-07 | 2008-05-15 | Halliburton Energy Services, Inc. | Offshore universal riser system |
| CN101037929A (en) * | 2007-04-06 | 2007-09-19 | 无锡浩安科技发展有限公司 | Well drilling blowout prevention killing well joint |
| CN201661272U (en) * | 2009-09-23 | 2010-12-01 | 中国石油化工集团公司 | Automatic blowout well killing control device |
Non-Patent Citations (2)
| Title |
|---|
| 周英操 等: "控压钻井技术探讨与展望", 《石油钻探技术》, vol. 36, no. 4, 31 July 2008 (2008-07-31), pages 1 - 4 * |
| 王卫峰 等: "川东北地区试气测试工艺技术", 《油气井测试》, vol. 18, no. 3, 30 June 2009 (2009-06-30), pages 71 - 74 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105672927B (en) * | 2014-11-21 | 2019-04-05 | 中石化胜利石油工程有限公司钻井工艺研究院 | A kind of well killing method after gas drilling blowout |
| CN108204223A (en) * | 2016-12-19 | 2018-06-26 | 中国石油天然气股份有限公司 | Brine layer pressure relief method |
| CN108204223B (en) * | 2016-12-19 | 2020-03-10 | 中国石油天然气股份有限公司 | Brine layer pressure relief method |
| CN111236868A (en) * | 2020-03-19 | 2020-06-05 | 中国石油天然气集团有限公司 | Plugging method for well drilling overflow water outlet channel |
| CN111535771A (en) * | 2020-05-11 | 2020-08-14 | 中石化石油工程技术服务有限公司 | Blowout preventer emergency shutdown control system |
| CN111535771B (en) * | 2020-05-11 | 2022-04-26 | 中石化石油工程技术服务有限公司 | Blowout preventer emergency shutdown control system |
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Application publication date: 20111123 |