CN105507811A - Method for freezing formation water in gas drilling process - Google Patents
Method for freezing formation water in gas drilling process Download PDFInfo
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- CN105507811A CN105507811A CN201410506073.8A CN201410506073A CN105507811A CN 105507811 A CN105507811 A CN 105507811A CN 201410506073 A CN201410506073 A CN 201410506073A CN 105507811 A CN105507811 A CN 105507811A
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- 238000005553 drilling Methods 0.000 title claims abstract description 101
- 239000008398 formation water Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 33
- 230000008014 freezing Effects 0.000 title abstract description 9
- 238000007710 freezing Methods 0.000 title abstract description 9
- 239000007787 solid Substances 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 79
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 238000005520 cutting process Methods 0.000 claims description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims description 9
- 238000003672 processing method Methods 0.000 claims description 8
- 239000013049 sediment Substances 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 4
- 230000005494 condensation Effects 0.000 claims description 3
- 238000009833 condensation Methods 0.000 claims description 3
- 238000002513 implantation Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 8
- 239000006260 foam Substances 0.000 abstract description 5
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 239000002351 wastewater Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- XQCFHQBGMWUEMY-ZPUQHVIOSA-N Nitrovin Chemical compound C=1C=C([N+]([O-])=O)OC=1\C=C\C(=NNC(=N)N)\C=C\C1=CC=C([N+]([O-])=O)O1 XQCFHQBGMWUEMY-ZPUQHVIOSA-N 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- Earth Drilling (AREA)
Abstract
The invention relates to a method for freezing formation water in a gas drilling process. When formation water occurs in a gas drilling period, low-temperature gas that is condensed injected as a circulating medium into a well through a drill pipe and returns along with formation water and drill debris entering a shaft to a wellhead along an annulus when arriving at an outlet position; wherein the low-temperature gas returned up freezes the formation water dispersed in the annulus into particulate solid ice and carries it to the surface while freezing the well wall at the outlet position. The method enables a construction segment of gas drilling to be maximally extended, keeps efficient and safe drilling and high drilling speed and also prevents the problem of environmental pollution by waste water or waste mud caused in a foam drilling process.
Description
Technical field
What the present invention relates to a kind of formation water production in gas drilling process in the technical fields such as oil and gas well drilling, geological prospecting and mine probing freezes processing method.
Background technology
Gas drilling is one of fast, the most most economical drilling mode of current drilling speed, has the plurality of advantages not available for drilling fluid drilling well.Using gas as circulatory mediator, the drilling footage of drilling machinery drilling speed, single drill bit significantly can be improved on the one hand; Low as the gas density of circulatory mediator on the other hand, the pressure formed well is relatively low, effectively can solve the challenges such as the drilling fluid leakage of long open hole section low pressure broken formation; In prevention differential sticking, discovery and protection low pressure payzone and environmental protection etc., all there is obvious technical advantage simultaneously.The drilling practice of Sichuan Yuan Ba area, Junggar Basin, Xinjiang, china shows, at identical well section application gas drilling, bit speed can improve 3 ~ 10 times compared with conventional drilling.
According to the field applications of gas drilling, formation water output is the maximum hidden danger affecting gas drilling safe construction.After formation water output, drilling cuttings can be caused to form mud drum or mud cake ring because humidity is attached on drill string, cause well to reduce, circulation resistance increase, hole collapse, the complex situations such as bit freezing generation, thus constrain the application of gas drilling new technology.Therefore effectively administering formation water output is the key technology guarantee ensureing gas drilling new technology spread application.
Because pit shaft gas column pressure is well below formation pore pressure, in During Air Drilling, often run into the problem of formation water output.Field experience shows, under normal circumstances as formation water production seldom (3-5m
3/ h) time, by air-mist drilling or foam drilling technology, formation water can be carried outside, generally not affect gas drilling; But when formation water production is larger, excessive water and drilling cuttings, rock of borehole are had an effect, clay dispersion, expansion will be caused, the generation of the phenomenons such as borehole well instability, time serious, drill string torque and gas injection pressure obviously raise, even the complex accident such as bit freezing occur, the application of foam drilling simultaneously can bring the environmental protection treatment problem of a large amount of foam sewage in well site.Therefore in site operation process, when formation water production is larger, based on the consideration of downhole safety and environmental protection aspect, have to stop gas drilling, usually be converted to conventional drilling liquid and continue drilling well, but after being converted to the drilling well of conventional drilling liquid, bit speed can significantly reduce compared with gas drilling, serious leakage and other complex situations usually occur thereupon simultaneously.
Summary of the invention
The present invention be directed to prior art exist problem, what provide the formation water production in gas drilling process of the formation water output problem in a kind of effective solution During Air Drilling freezes processing method, reach and reduce even security control formation water output, extend the time of application gas drilling construction, shortening drilling period, the object guaranteed downhole safety, reduce drilling well integrated cost, expediting exploration development rate.
Technical scheme of the present invention:
The processing method of freezing of formation water production in gas drilling process of the present invention is that basis based on existing gas drilling technology and equipment carries out improving, comprise: when finding formation water output during gas drilling, operating speed is crept in adjustment, source gas is cooled to subzero through condensation, is injected into well by drilling rod as circulatory mediator using cryogenic gas; After cryogenic gas arrives at water exit position, the formation water disperseed in annular space, while implementing to freeze to the water exit position borehole wall, is frozen into granulated solid ice and drilling cuttings is carried into ground by the cryogenic gas above returned; This process is until drill bit is through after water-yielding stratum, and gas drilling is water outlet no longer, recovers nominal gas drilling process.
Such scheme comprises further: set up condenser and temperature detector in entering on well gas piping of source of the gas part, at gas drilling sediment outflow pipeline place, humidity sensor and temperature pick up are installed, and will output signal with comprehensive logging instrument online, by temperature and humidity monitoring result, control cryogenic gas implantation temperature and to judge in annular space whether fully charge becomes solid ice to formation water.
Drilling rod in said method adopts high strength low temperature drilling rod, air or the nitrogen of K cryogenic treatment that what described cryogenic gas was selected be through, and cold-gas temperature must not lower than the minimum safe serviceability temperature of ultralow temperature drilling rod.
In such scheme, air and selecting of nitrogen are selected according to formation water output situation, can select air, also can select nitrogen for non-water-yielding stratum; Preferably nitrogen is selected for water-yielding stratum.To the control of cold-gas temperature according to water-yielding stratum water yield preferably between-5 DEG C to-25 DEG C.
The water exit position place borehole wall to be frozen into temperature pier body by adopting cryogenic gas and the glaciated process of formation water dispergated in annular space synchronously to be occurred with whole gas drilling by the present invention, rapidly, effectively the formation water entering pit shaft can be carried into ground with the form of solid ice, thus the generation of the complex situations such as mud shale imbibition, hole collapse, drilling tool bit freezing caused after avoiding a large amount of water outlet of conventional gas drilling condition sub-surface to enter pit shaft, extend the construction well section of gas drilling to greatest extent, significantly shorten drilling period; Use the method can not bring the problem of environmental pollutions such as a large amount of foam in well site, sewage or waste mud simultaneously.
Accompanying drawing explanation
Fig. 1 is for after finding formation water output in During Air Drilling, and schematic diagram arranged by the on-the-spot capital equipment implementing to freeze to process; Figure comprises: air compressor machine 1, film nitrogen-making device 2, supercharger 3, condenser 4, enter gas well gas temperature checkout gear 5, ultralow temperature drilling rod 6, sediment outflow pipeline 7, humidity sensor 8, temperature pick up 9, grit chamber 10.
Fig. 2 is normal gas drilling construction schematic diagram;
Bore construction schematic diagram when meeting water-yielding stratum during Fig. 3 is gas drilling, the coal powder quantity of bore returned through annular space obviously reduces;
After Fig. 4 finds formation water output during being gas drilling, implement the construction schematic diagram freezing to process;
Fig. 5 is the gas drilling construction schematic diagram after drilling water-yielding stratum;
Fig. 6 is drilling technology schematic flow sheet of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be further described:
What the invention provides a kind of formation water production in gas drilling process freezes processing method, and specific implementation process is:
(1), before boring chance water-yielding stratum, implement conventional gas drilling, be now mainly gas and drilling cuttings in annular space, as shown in Figure 2;
(2) when gas drilling bores chance water-yielding stratum, initial drilling cuttings returns out and occurs bonding phenomenon, and coal powder quantity of bore obviously reduces, and formation water output is described, as shown in Figure 3;
(3) when after discovery formation water output, first well site condenser 4 is completed, enter gas well gas temperature checkout gear 5, the replacing of ultralow temperature drilling rod in the installation of humidity sensor 8 and temperature pick up 9 and well, what then come into effect gas drilling formation water output freezes process drilling technology: air is respectively through air compressor machine 1 initial compression, use during film nitrogen making machine 2(nitrogen injection drilling) be separated, supercharger 3 pressurization obtains high normal pressure and temperature sky (nitrogen) gas, again through condenser 4 condensation process, enter gas well gas temperature checkout gear 5 Real-Time Monitoring, obtain sky (nitrogen) gas of high pressure low temperature laggard enter ultralow temperature drilling rod 6, wherein cold-gas temperature must not lower than the minimum safe serviceability temperature of ultralow temperature drilling rod.When cryogenic gas arrives at water exit position, carry the formation water that enters pit shaft and drilling cuttings is upwards migrated along annular space, above return in process and be frozen into temperature pier body gradually by absorbing water-yielding stratum borehole wall heat, can prevent from after this continuing water outlet; By absorbing the dispersed formation water heat entering mineshaft annulus, its quick freezing is become solid ice simultaneously, and be carried into ground, then enter grit chamber 10 by sediment outflow pipeline 7; During this period, the form being arranged on formation water in humidity sensor 8 in sediment outflow pipeline 7 and temperature pick up 9 Real-Time Monitoring annular space can be utilized, thus ensure that gas drilling formation water output freezes to process the successful implementation of drilling technology.As shown in Figure 4, in this technology implementation process, in annular space, be mainly the mixture of cryogenic gas, drilling cuttings and solid granular ice.
(4), after drilling water-yielding stratum, along with the continuation of this technology is implemented, the whole water-yielding stratum borehole wall will be frozen into temperature pier body completely gradually, and after this no longer water outlet during gas drilling, is mainly cryogenic gas and drilling cuttings, as shown in Figure 5 in mineshaft annulus.
(5), after drilling well completes water-yielding stratum section, conventional gas drilling technology flow process is reverted to.
Claims (3)
1. a formation water production in gas drilling process freeze processing method, based on conventional gas drilling equipment and Process ba-sis, when finding formation water output during gas drilling, operating speed is crept in adjustment, source gas is cooled to subzero through condensation, is injected into well by drilling rod as circulatory mediator using cryogenic gas; After cryogenic gas arrives at water exit position, the formation water disperseed in annular space, while implementing to freeze to the water exit position borehole wall, is frozen into granulated solid ice and drilling cuttings is carried into ground by the cryogenic gas above returned; This process is until drill bit is through after water-yielding stratum, and gas drilling is water outlet no longer, recovers nominal gas drilling process.
2. formation water production in gas drilling process according to claim 1 freeze processing method, it is characterized in that: set up condenser and temperature detector in entering on well gas piping of source of the gas part, at gas drilling sediment outflow pipeline place, humidity sensor and temperature pick up are installed, and will output signal with comprehensive logging instrument online, by temperature and humidity monitoring result, control cryogenic gas implantation temperature and to judge in annular space whether fully charge becomes solid ice to formation water.
3. formation water production in gas drilling process according to claim 1 and 2 freeze processing method, it is characterized in that: the drilling rod in said method adopts high strength low temperature drilling rod, air or the nitrogen of K cryogenic treatment that what described cryogenic gas was selected be through, and cold-gas temperature must not lower than the minimum safe serviceability temperature of ultralow temperature drilling rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410506073.8A CN105507811A (en) | 2014-09-27 | 2014-09-27 | Method for freezing formation water in gas drilling process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410506073.8A CN105507811A (en) | 2014-09-27 | 2014-09-27 | Method for freezing formation water in gas drilling process |
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| Publication Number | Publication Date |
|---|---|
| CN105507811A true CN105507811A (en) | 2016-04-20 |
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| CN201410506073.8A Pending CN105507811A (en) | 2014-09-27 | 2014-09-27 | Method for freezing formation water in gas drilling process |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106368608A (en) * | 2016-08-26 | 2017-02-01 | 中国石油大学(北京) | Novel method for conducting hot dry rock drilling through liquid nitrogen |
| CN108755676A (en) * | 2018-05-05 | 2018-11-06 | 深圳市蛇口招商港湾工程有限公司 | Anchor cable construction method under the conditions of rich aquifer sand layer |
| CN110644939A (en) * | 2019-10-16 | 2020-01-03 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | Drilling fluid circulation tank system |
| CN111472685A (en) * | 2020-04-16 | 2020-07-31 | 四川省科建煤炭产业技术研究院有限公司 | Intermittent dynamic condensation deep hole drilling method |
| CN113833425A (en) * | 2020-06-23 | 2021-12-24 | 中国石油化工股份有限公司 | Nitrogen drilling device, and treatment method and application of stratum produced water of nitrogen drilling |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2075089B (en) * | 1980-05-03 | 1984-05-23 | Linde Ag | Drilling method |
| CN103104205A (en) * | 2011-11-14 | 2013-05-15 | 母东艳 | Nitrogen well-drilling method in well-drilling field |
| CN103277120A (en) * | 2013-06-19 | 2013-09-04 | 西安科技大学 | Post-unfreezing water burst prevention method of non-full-depth freezing vertical shaft |
| CN104929513A (en) * | 2014-03-21 | 2015-09-23 | 中国石油化工集团公司 | Microwave-assisted rock-breaking gas-drilling equipment and gas-drilling well wall freezing method |
-
2014
- 2014-09-27 CN CN201410506073.8A patent/CN105507811A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2075089B (en) * | 1980-05-03 | 1984-05-23 | Linde Ag | Drilling method |
| CN103104205A (en) * | 2011-11-14 | 2013-05-15 | 母东艳 | Nitrogen well-drilling method in well-drilling field |
| CN103277120A (en) * | 2013-06-19 | 2013-09-04 | 西安科技大学 | Post-unfreezing water burst prevention method of non-full-depth freezing vertical shaft |
| CN104929513A (en) * | 2014-03-21 | 2015-09-23 | 中国石油化工集团公司 | Microwave-assisted rock-breaking gas-drilling equipment and gas-drilling well wall freezing method |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106368608A (en) * | 2016-08-26 | 2017-02-01 | 中国石油大学(北京) | Novel method for conducting hot dry rock drilling through liquid nitrogen |
| CN108755676A (en) * | 2018-05-05 | 2018-11-06 | 深圳市蛇口招商港湾工程有限公司 | Anchor cable construction method under the conditions of rich aquifer sand layer |
| CN108755676B (en) * | 2018-05-05 | 2020-06-26 | 深圳市蛇口招商港湾工程有限公司 | Anchor cable construction method under water-rich sand layer condition |
| CN110644939A (en) * | 2019-10-16 | 2020-01-03 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | Drilling fluid circulation tank system |
| CN111472685A (en) * | 2020-04-16 | 2020-07-31 | 四川省科建煤炭产业技术研究院有限公司 | Intermittent dynamic condensation deep hole drilling method |
| CN111472685B (en) * | 2020-04-16 | 2021-10-01 | 四川省科建煤炭产业技术研究院有限公司 | Intermittent dynamic condensation deep hole drilling method |
| CN113833425A (en) * | 2020-06-23 | 2021-12-24 | 中国石油化工股份有限公司 | Nitrogen drilling device, and treatment method and application of stratum produced water of nitrogen drilling |
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Application publication date: 20160420 |