CN115370328A - Large-caliber dynamic water reverse circulation gravel pack well completion process - Google Patents
Large-caliber dynamic water reverse circulation gravel pack well completion process Download PDFInfo
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- CN115370328A CN115370328A CN202211164875.6A CN202211164875A CN115370328A CN 115370328 A CN115370328 A CN 115370328A CN 202211164875 A CN202211164875 A CN 202211164875A CN 115370328 A CN115370328 A CN 115370328A
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- Prior art keywords
- reverse circulation
- well
- gravel
- drill bit
- moving water
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/04—Gravelling of wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
Abstract
The invention relates to the technical field of well completion processes, in particular to a large-caliber moving water reverse circulation gravel filling well completion process, which comprises the following steps of S1: a drilling stage; s2: a pipe laying stage; s3: and a gravel filling stage. According to the invention, gravel materials are smoothly filled into a specified position through a large-caliber moving water reverse circulation gravel filling process, the reverse filter layer is ensured to be finished according to the set target high quality, the reverse filter layer formed by the large-caliber moving water reverse circulation gravel filling process has a certain thickness, the annular space between a stratum and a well pipe is effectively relieved, the collapse of a well wall is prevented, the blockage caused by stratum collapse is avoided, the constancy of stratum effluent is ensured, most of slurry in the well is discharged by reverse circulation in the gravel filling process in the large-caliber moving water reverse circulation gravel filling process, and the discharged water can quickly reach the water sand cleaning effect through combined well washing.
Description
Technical Field
The invention relates to the technical field of well completion processes, in particular to a large-caliber moving water reverse circulation gravel filling well completion process.
Background
Sandstone is one of typical thermal reservoirs in China, is widely mined, sandstone thermal reservoir with higher underground hot water exploitation and utilization degree at present mostly belongs to a stratum of a recent system or an ancient system, but a production well is easy to produce sand and serious in silting, a recharge well is low in recharge rate, and the following difficulties are mainly caused: the consolidation degree is low, the diagenesis is poor, the particle size is fine, the particle size is generally 0.1-2 mm, and the components are feldspar, quartz and the like mostly; the clay mineral content is high, and engineering technical problems such as hole shrinkage, sticking and the like easily occur in the drilling process, and the problems are caused because the underground hot water reservoir is influenced because the mudstone is easy to hydrate, expand, disperse and migrate after meeting water; the rock heat reservoir mostly belongs to the sedimentation of river and lake facies, and is influenced by the sedimentary rhythm and the sedimentary environment at that time, so that the heat reservoir has stronger heterogeneity; in the process of mining, due to the fact that the anti-filtration layer is not standard or is arranged, a mining well is prone to causing collapse of a well wall, so that the well is blocked, water quantity and water temperature are not constant or continuously attenuate, and improvement is needed.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a large-caliber moving water reverse circulation gravel filling well completion process.
In order to achieve the purpose, the invention adopts the following technical scheme: a large-caliber dynamic water reverse circulation gravel filling well forming process comprises the following steps:
s1: a drilling stage;
s2: a pipe laying stage;
s3: and a gravel filling stage.
In order to plan the specific implementation of the drilling stage, the invention improves that in S1, the specific steps of the drilling stage include reaming and drilling, in which a first drill bit is used to drill to the position a, a second drill bit is used to ream to the position B, and a third drill bit is used to ream to the position C again (this is the pump time interval), so as to complete the logging operation.
In order to limit the models of a first drill bit, a second drill bit and a third drill bit, the invention has the improvement that the model of the first drill bit is a phi 311mm drill bit, the model of the second drill bit is a phi 500mm drill bit, and the model of the third drill bit is a phi 600mm drill bit.
In order to further limit the positions of the A position, the B position and the C position, the improved position is that the A position is the depth of a designed hole, the B position is the bottom of the hole, and the C position is the designed reducing position.
In order to plan the specific implementation of the pipe laying stage, the invention has the improvement that in S2, the pipe laying stage comprises the steps that after well drilling and well logging are carried out, the whole well section adopts one-time pipe laying, firstly, a first petroleum casing pipe is sequentially laid to the reducing depth according to the sequence of the pipe arrangement, the reducing joint is connected, then, a second petroleum casing pipe is sequentially laid to the bottom of the well, and the pipe laying is finished.
In order to further limit the models of the first oil casing and the second oil casing, the model of the first oil casing is phi 244.5mm oil casing, and the model of the second oil casing is phi 339.7mm oil casing.
In order to plan the concrete implementation of the gravel filling stage, the improvement of the invention is that in the step S3, the gravel filling stage specifically includes using quartz sand as gravel material to be put in, after a drill rod is put into a proper position in the well, the inside of a second petroleum casing opening is sealed, so that an approximately closed space is formed inside the shaft, moving water is used for gravel filling, the gravel material is put in to ensure that the gravel material sinks uniformly and slowly, and slurry in the shaft is forced to be discharged out of the ground surface through the drill rod by increasing pressure in the process of sinking.
In order to limit the material selection of the quartz sand, the invention has the improvement that the quartz sand adopts 3-5 mm hard quartz sand which is in a shape of a round.
Compared with the prior art, the invention has the advantages and positive effects that:
according to the invention, through further setting of a drilling stage, a pipe descending stage and a gravel filling stage, the gravel material can be smoothly filled into a specified position by a large-caliber moving water reverse circulation gravel filling process adopted in the whole construction, the reverse filter layer is ensured to be finished according to the set target high quality, the reverse filter layer formed by the large-caliber moving water reverse circulation gravel filling process has a certain thickness, the annular space between the stratum and the well pipe is effectively relieved, the collapse of the well wall is prevented, the blockage caused by stratum collapse is avoided, the formation effluent is ensured to be constant, most of the slurry in the well is discharged by reverse circulation in the gravel filling process in the large-caliber moving water reverse circulation gravel filling process, and through combined well washing, the discharged water can quickly achieve water sand cleaning, and because of the efficient filtering and buffering of the reverse filter layer, parameters such as water temperature and water quantity are slightly changed along with the passage of time in the water pumping test process, so that the water temperature and the water quantity are kept relatively constant, and the continuous and stable well productivity is ensured.
Drawings
FIG. 1 is a schematic flow chart of a large-caliber dynamic water reverse circulation gravel-filling well-forming process provided by the invention;
FIG. 2 is a simplified flow diagram of a large-caliber dynamic water reverse circulation gravel pack well completion process according to the present invention;
FIG. 3 is a schematic view of the pipe laying stage in the drilling stage of the large-caliber dynamic water reverse circulation gravel pack well completion process according to the present invention;
FIG. 4 is a schematic diagram of a gravel packing stage of a large-caliber dynamic water reverse circulation gravel packing well completion process according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Example one
S1: a drilling stage;
s2: a pipe laying stage;
s3: and a gravel filling stage.
The specific steps of the drilling stage comprise reaming and drilling, wherein a first drill bit is used for drilling to a position A, a second drill bit is used for reaming to a position B, and a third drill bit is used for reaming to a position C (taking the position as a pump time interval) again to complete the well logging work, wherein the type of the first drill bit is a phi 311mm drill bit, the type of the second drill bit is a phi 500mm drill bit, and the type of the third drill bit is a phi 600mm drill bit.
The specific steps of the pipe laying stage comprise that after well drilling and well logging, disposable pipe laying is adopted in the whole well section, a first petroleum casing pipe is sequentially laid in the sequence of pipe arrangement to the variable diameter depth, the variable diameter joint is connected, a second petroleum casing pipe is sequentially laid at the bottom of the well, pipe laying is completed, the model of the first petroleum casing pipe is phi 244.5mm, the model of the second petroleum casing pipe is phi 339.7mm, and the design aims to further limit the models of the first petroleum casing pipe and the second petroleum casing pipe.
The gravel filling stage specifically comprises the steps of taking quartz sand as gravel materials needing to be put in, sealing the inside of a second petroleum casing opening after a drill rod is put into the well to a proper position, enabling the inside of the well shaft to form an approximately closed space, moving water to fill gravel, putting the gravel materials into the well to ensure that the gravel materials uniformly and slowly sink, and forcing slurry in the well shaft to be discharged out of the ground surface through the drill rod through continuously increased pressure in the sinking process.
The working principle is as follows: the reaming drilling comprises the steps of firstly drilling a phi 311mm drill bit to the deep part of a designed hole, secondly reaming the hole to the bottom of the hole by adopting a phi 500mm drill bit, and finally reaming the hole to a designed variable diameter position (taking the variable diameter position as a pumping time interval) by adopting a phi 600mm drill bit to complete the logging operation, wherein after the logging operation of drilling and well completion, a whole well section adopts one-time pipe descending, firstly, sequentially descending phi 244.5mm petroleum casings to the variable diameter depth according to the sequence of pipe discharging, connecting a variable diameter joint, and then connecting phi
And sequentially descending 339.7mm petroleum casings to the bottom of the well to finish the pipe descending, preferably selecting 3-5 mm hard and round quartz sand as gravel materials to be thrown, descending a drill rod to a proper position in the well, sealing the inside of a phi 339.7mm casing opening to form an approximately closed space in the well shaft, moving water to fill gravel, ensuring that the gravel materials are uniformly and slowly sunk, and forcing slurry in the well shaft to be discharged out of the ground surface through the drill rod by continuously increasing pressure in the sinking process.
Although the present invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (8)
1. A large-caliber dynamic water reverse circulation gravel-pack well-completion process is characterized by comprising the following steps:
s1: a drilling stage;
s2: a pipe laying stage;
s3: and a gravel filling stage.
2. The large caliber moving water reverse circulation gravel pack well completion process of claim 1, wherein: in the S1, the drilling stage comprises reaming drilling, namely firstly drilling to the position A by using a first drill bit, secondly reaming to the position B by using a second drill bit, and finally reaming to the position C by using a third drill bit (taking the position as the pump time interval), so that the logging work is completed.
3. The large caliber moving water reverse circulation gravel pack well completion process of claim 2, wherein: the model of the first drill bit is a phi 311mm drill bit, the model of the second drill bit is a phi 500mm drill bit, and the model of the third drill bit is a phi 600mm drill bit.
4. The large caliber moving water reverse circulation gravel pack well completion process of claim 2, wherein: the position A is the depth of the design hole, the position B is the hole bottom, and the position C is the designed variable diameter position.
5. The large caliber moving water reverse circulation gravel pack well completion process of claim 1, wherein: and in the S2, the pipe laying stage comprises the specific steps that after well drilling and well logging are carried out, disposable pipe laying is adopted in the whole well section, firstly, a first petroleum casing pipe is sequentially laid to the variable diameter depth according to the sequence of the pipe arrangement, the variable diameter joint is connected, and then a second petroleum casing pipe is sequentially laid to the bottom of the well to complete pipe laying.
6. The large caliber moving water reverse circulation gravel pack well completion process of claim 5, wherein: the model of the first oil casing is phi 244.5mm oil casing, and the model of the second oil casing is phi 339.7mm oil casing.
7. The large caliber moving water reverse circulation gravel pack well completion process of claim 1, wherein: and S3, the gravel filling stage specifically comprises the steps of taking quartz sand as a gravel material to be put in, putting a drill rod into the well to a proper position, sealing the inside of the second petroleum casing opening, forming an approximately closed space in the shaft, moving water for gravel filling, putting the gravel material to ensure that the gravel material sinks uniformly and slowly, and forcing slurry in the shaft to be discharged out of the ground surface through the drill rod under the continuously increased pressure in the process of sinking.
8. The large caliber moving water reverse circulation gravel pack well completion process of claim 7, wherein: the quartz sand is hard and approximately round quartz sand with the texture of 3-5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211164875.6A CN115370328A (en) | 2022-09-23 | 2022-09-23 | Large-caliber dynamic water reverse circulation gravel pack well completion process |
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| CN202211164875.6A CN115370328A (en) | 2022-09-23 | 2022-09-23 | Large-caliber dynamic water reverse circulation gravel pack well completion process |
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| CN115370328A true CN115370328A (en) | 2022-11-22 |
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| CN202211164875.6A Pending CN115370328A (en) | 2022-09-23 | 2022-09-23 | Large-caliber dynamic water reverse circulation gravel pack well completion process |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87205847U (en) * | 1987-03-31 | 1988-12-07 | 李任年 | Device for filling gravel inside pipe |
| CN200979311Y (en) * | 2006-11-30 | 2007-11-21 | 赵树林 | Water extraction and filling well for water source heat pump cooling-warming air-conditioning system |
| JP2011191014A (en) * | 2010-03-16 | 2011-09-29 | Sumitomo Fudosan Kk | Underground heat use system |
| CN207526480U (en) * | 2017-11-21 | 2018-06-22 | 核工业北京化工冶金研究院 | A kind of heavy caliber reducing type fills out gravel drawing liquid well |
| CN108468528A (en) * | 2018-05-18 | 2018-08-31 | 河北省地矿局国土资源勘查中心 | Fourth-series deep well layered water pumping and stopping device and water pumping and stopping method thereof |
| CN110777798A (en) * | 2019-10-29 | 2020-02-11 | 北京市水文地质工程地质大队(北京市地质环境监测总站) | Method and equipment for filling dynamic water rotational flow in underground water monitoring well |
| CN110905403A (en) * | 2019-12-09 | 2020-03-24 | 中冶集团武汉勘察研究院有限公司 | Construction method of large-diameter groundwater environment monitoring well |
| CN111022025A (en) * | 2019-12-13 | 2020-04-17 | 江苏长江地质勘查院 | Deep brine exploration and production combined process |
| CN111927405A (en) * | 2020-07-26 | 2020-11-13 | 万江新能源集团有限公司 | Efficient filtering system applied to geothermal well |
| CN113107367A (en) * | 2021-04-02 | 2021-07-13 | 中石化绿源地热能(陕西)开发有限公司 | Same-well same-layer mining and irrigating well completion method |
-
2022
- 2022-09-23 CN CN202211164875.6A patent/CN115370328A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87205847U (en) * | 1987-03-31 | 1988-12-07 | 李任年 | Device for filling gravel inside pipe |
| CN200979311Y (en) * | 2006-11-30 | 2007-11-21 | 赵树林 | Water extraction and filling well for water source heat pump cooling-warming air-conditioning system |
| JP2011191014A (en) * | 2010-03-16 | 2011-09-29 | Sumitomo Fudosan Kk | Underground heat use system |
| CN207526480U (en) * | 2017-11-21 | 2018-06-22 | 核工业北京化工冶金研究院 | A kind of heavy caliber reducing type fills out gravel drawing liquid well |
| CN108468528A (en) * | 2018-05-18 | 2018-08-31 | 河北省地矿局国土资源勘查中心 | Fourth-series deep well layered water pumping and stopping device and water pumping and stopping method thereof |
| CN110777798A (en) * | 2019-10-29 | 2020-02-11 | 北京市水文地质工程地质大队(北京市地质环境监测总站) | Method and equipment for filling dynamic water rotational flow in underground water monitoring well |
| CN110905403A (en) * | 2019-12-09 | 2020-03-24 | 中冶集团武汉勘察研究院有限公司 | Construction method of large-diameter groundwater environment monitoring well |
| CN111022025A (en) * | 2019-12-13 | 2020-04-17 | 江苏长江地质勘查院 | Deep brine exploration and production combined process |
| CN111927405A (en) * | 2020-07-26 | 2020-11-13 | 万江新能源集团有限公司 | Efficient filtering system applied to geothermal well |
| CN113107367A (en) * | 2021-04-02 | 2021-07-13 | 中石化绿源地热能(陕西)开发有限公司 | Same-well same-layer mining and irrigating well completion method |
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| CB03 | Change of inventor or designer information |
Inventor after: Zhang Shengsheng Inventor after: Cai Jingshou Inventor after: Li Binmin Inventor after: Wang Guangwei Inventor after: Wang Weili Inventor before: Zhang Shengsheng Inventor before: Cai Jingshou Inventor before: Li Binmin Inventor before: Wang Guangwei |
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