CN104153744B - Pore type geothermal well jet well-flushing device and method for jetting well-flushing by using same - Google Patents
Pore type geothermal well jet well-flushing device and method for jetting well-flushing by using same Download PDFInfo
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- CN104153744B CN104153744B CN201410371366.XA CN201410371366A CN104153744B CN 104153744 B CN104153744 B CN 104153744B CN 201410371366 A CN201410371366 A CN 201410371366A CN 104153744 B CN104153744 B CN 104153744B
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- 238000011010 flushing procedure Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000011148 porous material Substances 0.000 title claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000012530 fluid Substances 0.000 claims abstract description 14
- 238000005406 washing Methods 0.000 claims description 20
- 238000005553 drilling Methods 0.000 claims description 12
- 239000002002 slurry Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 239000011435 rock Substances 0.000 claims description 7
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 239000000440 bentonite Substances 0.000 claims description 3
- 229910000278 bentonite Inorganic materials 0.000 claims description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims 1
- 229910000029 sodium carbonate Inorganic materials 0.000 claims 1
- 239000007921 spray Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
A hole-type geothermal well jet flushing device applied to flushing of newly-tied Ming-Hua-Zheng (Nm) group of houses and pottery (Ng) and ancient-tied Dongying (Ed) group of riverway (Es) is characterized in that a drill rod joint is connected with a transverse nozzle body, transverse nozzles in different directions are arranged on the drill rod joint, the lower part of the drill rod joint is connected with a jet-suction joint through a reducing joint and a mixer outer pipe, a mixer is arranged on the jet-suction joint, a longitudinal nozzle body and a longitudinal nozzle are arranged in the mixer outer pipe, and through setting a proper jet flushing process, through the jet suction effect generated by jet flow and jet flow, not only the mud skin of a filter pipe is cleaned and sucked, but also the effects of direct water horsepower and broken mud skin are achieved, the high-pressure jet fluid body breaks and sucks all the mud skin, the jet flow forms 'water wedge', the microcracks or the cracks are expanded, so that a hot flow channel is dredged.
Description
Technical Field
The invention relates to the field of pore type geothermal well flushing, in particular to a jet flushing device after a geothermal well filter pipe is blocked and hot water cannot be discharged, and a method for jet flushing a pore type geothermal well by using the flushing device.
Background
The pore type geothermal well heat storage is mainly a newly-invented Ming-Hua-Zheng (Nm) group of Librarian pottery (Ng) and an ancient-Dongying group (Ed) of the Shahejie street group (Es), and has a deletion phenomenon due to the influence of the structure. The formation drilled and encountered is the fourth series, the recent series and the ancient series, the geothermal well is simple in formation, the hole wall is unstable, water absorption and expansion are easy, the hole shrinkage is easy, oil gas is contained, and the like, the well is difficult to form, after the geothermal well is formed, the formation is silt, silt and fine sand, the pores of the fine sand formation are small, the water content is small, the corresponding water yield is small, and a large amount of mud skin and the mud skin on the hole wall are clamped between the well pipe and the wire winding filter pipe after the geothermal well is arranged, so that a water outlet channel of the formation is blocked. The purpose of water discharge cannot be achieved by adopting piston well washing and air compressor well washing, and a waste well is easily caused in actual production.
Disclosure of Invention
In order to solve the problems, through years of research and injection well-flushing practice, the inventor of the application finds that when the water power of jet flow is high enough, the jet flow not only has the function of cleaning mud skins of the filter pipe, but also has the function of directly or crushing rocks, the high-pressure jet fluid completely crushes the mud skins and removes microcracks or cracks of the rocks, and water wedges formed by the jet flow expand the microcracks or cracks, so that a hot flow channel is dredged, the maximum water yield is generated, and therefore the injection well-flushing device for the pore-type geothermal well and the method for performing injection well-flushing on the pore-type geothermal well by using the injection well-flushing device are provided. The high-speed jet speed, impact force, water power and the suction effect generated by the jet well-flushing device are utilized to realize that all mud skins or blockages are broken and sucked out, thereby achieving the purpose of water outlet.
The complete technical scheme of the invention is as follows:
a pore type geothermal well jet well washer comprises a drill rod joint, a transverse nozzle body, a transverse nozzle, a reducer union, a ball body, a longitudinal nozzle, a mixer outer tube, a mixer and a jet-suction joint. The drill rod joint is connected with a transverse nozzle body, a transverse nozzle is arranged on the transverse nozzle body through a screw thread, the transverse nozzle body is connected with a variable-diameter joint through a screw thread, the variable-diameter joint is connected with a longitudinal nozzle body, the longitudinal nozzle body is provided with a ball seat and a longitudinal nozzle, the longitudinal nozzle body is connected with an outer pipe of a mixer through a screw thread, the outer pipe of the mixer is connected with an injection-suction joint, and the injection-suction joint is provided with a vertical hole and an inclined hole and is provided with the mixer.
In order to improve the suction effect, a vertical hole and a 45-degree inclined hole are designed on the spray-suction joint.
The method for carrying out jet well washing on the pore type geothermal well by using the jet well washing device comprises the following steps:
after the well is formed, a jet well washer is adopted to carry out jet well washing on the pore type geothermal well, and along with the well washing process, the washing liquid is gradually replaced by mud (namely 5 wt% of bentonite and 0.3 wt% of Na) from clean water2CO3+0.4 wt% CMC +0.4 wt% KHm, balance water), the final rinse being clear water, the slurry rinse having a density of 1.03g/cm3The funnel viscosity is 22-25S, and the plastic viscosity is 1 × 10-2Pa.S, water loss of 15ml/30min and pH value of 9.5.
The technological parameters of the used jet well-flushing device are as follows:
(1) the jet speed, i.e. the jet speed at the outlet of the jet orifice, is calculated as
υj＝(10Q/A0)
Wherein,
in the formula: upsilon isj-jet speed, m/s;
q-drilling fluid flow through the drill pipe, L/s;
A0jet outlet cross-sectional area, cm2；
di-nozzle diameter, cm;
n-the number of nozzles.
(2) The jet impact force, i.e. the total force of the jet at the jet outlet over its area of action, is calculated by the formula
Fj＝ρdQ2/100A0
In the formula: fj-jet impact force, KN;
ρddrilling fluid density, g/cm3；
(3) The power of the jet water, namely the working capacity of the jet in unit time when the jet washes rock debris, is calculated by the formula
Pj＝0.05ρdQ2/A0 2
In the formula: pj-jet water power, KW.
The invention has the beneficial effects that:
1. aiming at the geothermal type pore well, the improved jet well washer is adopted to carry out jet well washing on the pore type geothermal well, through reasonable process parameter setting, not only is the mud skin of the filter pipe cleaned, but also the rock is directly broken, the high-pressure jet fluid breaks all the mud skin and removes microcracks or cracks of the rock, the jet fluid forms water wedges, the microcracks or cracks are enlarged, and therefore the hot flow channel is dredged, and the maximum water yield is generated.
2. In the process of drilling and well completion, chemical treatment slurry is adopted, and the drilling and well completion slurry has the advantages of small specific gravity, small water loss, good fluidity, certain anti-clay infiltration capacity and good hole protection effect.
Drawings
FIG. 1 is a schematic diagram of a pore type geothermal well jet well washer structure of the invention.
FIG. 2 is a schematic representation of a cross-section A-A of the pore type geothermal well jet washer of the invention of FIG. 1
FIG. 3 is a schematic representation of a cross-sectional view B-B of the pore type geothermal well jet washer of the present invention of FIG. 1.
In the figure, 1, a drill rod joint, 2, a transverse nozzle body, 3, a transverse nozzle, 4, a reducer union, 5, a ball body, 6, a longitudinal nozzle body, 7, a longitudinal nozzle, 8, an outer pipe of a mixer, 9, a mixer and 10, a spray-suction joint.
Detailed Description
The pore type geothermal well jet well washer of the present invention is not limited by the following examples, and the specific implementation can be determined according to the technical scheme and the specific situation and the stratum situation of the present invention.
The pore type geothermal well jet well washer is further described in detail by combining the example and the attached drawings.
As shown in attached figures 1-3, the pore type geothermal well jet well washer comprises a drill rod joint 1, a transverse nozzle body 2, a transverse nozzle 3, a reducer union 4, a ball 5, a longitudinal nozzle body 6, a longitudinal nozzle 7, a mixer outer tube 8, a mixer 9 and a jet-suction joint 10. The drill rod joint 1 is connected with a transverse nozzle body 2, the transverse nozzle body 2 is provided with a transverse nozzle 3 through a screw thread and is connected with a reducing joint 4, the reducing joint 4 is connected with a longitudinal nozzle body 6, the longitudinal nozzle body 6 is connected with a longitudinal nozzle 7 and a mixer outer pipe 8, the mixer outer pipe 8 is connected with an injection and suction joint 10, and the injection and suction joint is provided with a vertical hole and an inclined hole and is provided with a mixer 9.
As shown in fig. 2, the lateral nozzle 3 is fixed to the lateral nozzle body 2.
As shown in fig. 3, the ejector adapter 10 has 4 vertical holes and 45 ° inclined holes, respectively.
The slurry pump is used for the conditions required by the construction operation of the geothermal well filter pipe with the inner diameter phi of 125 mm-230 mm, the discharge capacity of the slurry pump is not less than 1200L/min, the pressure is not less than 10MPa,
the working principle of the pore type geothermal well jet flushing device is as follows: after the jet well-flushing device is lowered to a water-bearing stratum, flushing liquid (clean water) is circulated, the flushing liquid is divided into two parts by the jet well-flushing device, and one part is generated by the transverse nozzle 3 to completely crush and flush out mud skins or blockages. The other part of flushing fluid enters an outer pipe 8 of the mixer through high-pressure jet flow generated by a longitudinal nozzle body 6 and a longitudinal nozzle 7, negative pressure generated in the inner cavity of the outer pipe 8 of the mixer sucks 'mud skin or blockage' outside the filter through a vertical hole of an ejection connector 10, meanwhile, the flushing fluid washes 'mud skin or blockage' outside the filter through an inclined hole of the ejection connector 10, the flushing device is movably ejected according to a fixed stroke in the flushing process, after the solid content of the flushing fluid is less than 1%, a ball body 5 is thrown in to block a channel under the flushing fluid, and the transverse nozzle 3 generates higher jet flow speed, impact force and water power to further 'break' the mud skin or blockage outside the filter and flush out the mud skin or the blockage. The mud skin or the blockage is carried out of the hole through the flushing liquid, so that a hot flow channel is dredged, and the maximum water yield is generated.
The specific method for carrying out jet well washing on the pore type geothermal well by adopting the jet well washing device comprises the following steps:
drilling a hole by adopting positive circulation mud aiming at the pore type geothermal well;
logging, wherein azimuth angle, apex angle, resistivity and well temperature are logged when the designed well depth is reached so as to determine a thermal reservoir and well temperature;
after the well is formed, a jet well washer is adopted to carry out jet well washing on the pore type geothermal well, and along with the well washing process, the washing liquid gradually replaces mud (namely 5 wt% of bentonite and 0.3 wt% of Na) by clean water2CO3+0.4 wt% CMC +0.4 wt% KHm, balance water), the final rinse being clear water, the slurry rinse having a density of 1.03g/cm3The funnel viscosity is 22-25S, and the plastic viscosity is 1 × 10-2Pa.S, water loss of 15ml/30min and pH value of 9.5. The technological parameters of the used jet well-flushing device are as follows:
(1) the jet speed, i.e. the jet speed at the outlet of the jet orifice, is calculated as
υj＝(10Q/A0)
Wherein,
in the formula: upsilon isj-jet speed, m/s;
q-drilling fluid flow through the drill pipe, L/s;
A0jet outlet cross-sectional area, cm2；
di-nozzle diameter, cm;
n-the number of nozzles.
(2) The jet impact force, i.e. the total force of the jet at the jet outlet over its area of action, is calculated by the formula
Fj＝ρdQ2/100A0
In the formula: fj-jet impact force, KN;
ρddrilling fluid density, g/cm3；
(3) The power of the jet water, namely the working capacity of the jet in unit time when the jet washes rock debris, is calculated by the formula
Pj＝0.05ρdQ2/A0 2
In the formula: pj-jet water power, KW.
In actual production, the jet flow jet speed is 40m/s, the jet flow impact force is 0.816KN, and the jet flow water power is 16.48 KW.
In actual production, after geothermal wells are drilled and drilled in eastern Shandong and Binzhou areas, no water exists through piston well washing and air compressor well washing, and then the water yield is more than 60m after the wells are washed by a jet well washer3H, water temperature is more than 60 ℃.
Claims (6)
1. The utility model provides a hole type geothermal well sprays well-flushing ware which characterized in that: by drilling rod joint (1), horizontal nozzle body (2), horizontal nozzle (3), reducer union (4), spheroid (5), vertical nozzle body (6), vertical nozzle (7), blender outer tube (8), blender (9), it constitutes to spout suction joint (10), horizontal nozzle body (2) is connected in drilling rod joint (1), install horizontal nozzle (3) through the screw thread on horizontal nozzle body (2), reducer union (4) is connected to horizontal nozzle body (2) screw thread, longitudinal nozzle body (6) is connected in reducer union (4), be provided with ball seat and vertical nozzle (7) on vertical nozzle body (6), vertical nozzle body (6) are through screw thread connection blender outer tube (8), blender outer tube (8) link to each other with spout suction joint (10), it has vertical hole and inclined hole to spout suction joint (10) on, and be equipped with blender (9).
2. The jet flushing apparatus of claim 1, wherein: the transverse nozzle body (2) is provided with 10 rows of transverse nozzles (3).
3. The jet flushing apparatus of claim 1, wherein: the upper part of the longitudinal nozzle body (6) is provided with a ball body (5) which can be thrown in during the jet well washing process.
4. A method of jet flushing a pore type geothermal well using the jet washer of claim 1, wherein:
aiming at the pore type geothermal well, drilling the well by adopting positive circulation mud, and after the well is formed, carrying out jet well washing on the pore type geothermal well by adopting a jet well washer, wherein the used process parameters of the jet well washer are as follows:
(1) the jet speed, i.e. the jet speed at the outlet of the jet orifice, is calculated as
υj＝(10Q/A0)
Wherein,
in the formula: upsilon isj-jet speed, m/s;
q-drilling fluid flow through the drill pipe, L/s;
A0jet outlet cross-sectional area, cm2；
di-nozzle diameter, cm;
n-the number of nozzles;
(2) the jet impact force, i.e. the total force of the jet at the jet outlet over its area of action, is calculated by the formula
Fj＝ρdQ2/100A0
In the formula: fj-jet impact force, KN;
ρddrilling fluid density, g/cm3；
(3) The jet flow water power, namely the working capacity of the jet flow in the unit time for flushing rock debris, is calculated according to the following formula:
Pj＝0.05ρdQ2/A0 2
in the formula: pj-jet water power, KW.
5. A method of jet flushing a pore type geothermal well with a jet flushing apparatus according to claim 4, wherein: the jet flow jetting speed is 40m/s, the jet flow impact force is 0.816KN, and the jet flow water power is 16.48 KW.
6. A method of jet flushing a pore type geothermal well by a jet flushing device according to claim 4 or 5, wherein: along with the well washing process, the washing liquid is gradually replaced by clear water into slurry, and the finally used washing liquid is clear water, wherein the slurry comprises the components of 5 wt% of bentonite and 0.3 wt% of Na2CO30.4 wt% CMC, 0.4 wt% KHm, the balance water.
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| CN201410371366.XA CN104153744B (en) | 2014-07-31 | 2014-07-31 | Pore type geothermal well jet well-flushing device and method for jetting well-flushing by using same |
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| CN201410371366.XA CN104153744B (en) | 2014-07-31 | 2014-07-31 | Pore type geothermal well jet well-flushing device and method for jetting well-flushing by using same |
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| CN104153744B true CN104153744B (en) | 2017-01-25 |
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| CN105131924B (en) * | 2015-08-18 | 2017-11-28 | 任丘市奥源石油科技有限公司 | Spontaneous foam washing well liquid tackifier and flushing fluid preparation agents and flushing fluid |
| CN109386254A (en) * | 2017-08-08 | 2019-02-26 | 魏志海 | Dry-hot-rock geothermal well high voltagehigh frequency vibrates well-washing device |
| CN111395994A (en) * | 2020-03-13 | 2020-07-10 | 中石化绿源地热能(陕西)开发有限公司 | High-pressure hydraulic jet radial jet well washing device |
| CN112696173A (en) * | 2021-01-06 | 2021-04-23 | 中石化绿源地热能(陕西)开发有限公司 | One-trip drilling high-pressure well washer and well washing method for geothermal well |
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| CN2366549Y (en) * | 1999-04-14 | 2000-03-01 | 长庆石油勘探局第二采油厂 | Double direction clean-out rig of oil/water well |
| CN101078336A (en) * | 2006-05-24 | 2007-11-28 | 大港油田集团有限责任公司 | Low-pressure well negative pressure continuous sand washing technique |
| MX336590B (en) * | 2010-01-20 | 2016-01-21 | Halliburton Energy Services Inc | Wellbore filter screen and related methods of use. |
| WO2012128819A1 (en) * | 2011-03-15 | 2012-09-27 | Dyer Richard J | Oil well cleaning compositions |
| CN202056120U (en) * | 2011-03-18 | 2011-11-30 | 李永明 | Novel negative pressure draining and decontaminating device |
| CN103790521B (en) * | 2013-12-09 | 2016-01-13 | 中国石油大学(北京) | Safe and efficient mud drilling jet mill bit for horizontal well |
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