CN205823215U - Well structure and device for uncertain target reservoir stratum - Google Patents
Well structure and device for uncertain target reservoir stratum Download PDFInfo
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- CN205823215U CN205823215U CN201620558765.1U CN201620558765U CN205823215U CN 205823215 U CN205823215 U CN 205823215U CN 201620558765 U CN201620558765 U CN 201620558765U CN 205823215 U CN205823215 U CN 205823215U
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Abstract
The utility model belongs to the field of geothermal exploration and exploitation, in particular to a well structure and a device when an uncertain target reservoir is located in a stratum, a first-grade caliber/first-grade sleeve, a second-grade caliber/second-grade sleeve, a third-grade caliber/third-grade sleeve, a fourth-grade caliber/fourth-grade sleeve and a fifth-grade caliber, a pipe delivery joint is connected with the third-grade sleeve and is provided with a hanger seat, the fourth-grade sleeve with a hanger is arranged on the hanger seat, the third-grade sleeve is overlapped with the second-grade sleeve by no less than 15m, the fourth-grade sleeve is hung on the hanger seat through the hanger, the upper end and the lower end of the fourth-grade sleeve are fixed with expansion rubber, and the fourth-grade sleeve is; one-level bore/first order sleeve pipe, second grade bore/second grade sleeve pipe, third grade bore/third grade sleeve pipe adopt well cementation cement well cementation, the utility model discloses a structure can improve the well completion rate, increases the utilization ratio, improves economic benefits.
Description
Technical field
This utility model belongs to geotherm geology exploration, exploitation field, especially relates to a kind of uncertain target reservoir place
Well construction during stratum and device.
Background technology
In geotherm geology works, drilling well (drilling) refers to utilize plant equipment, and the diameter being drilled to underground is relatively
The column circular hole that little, the degree of depth is bigger.Drilling well is divided into geologic prospecting or exploration drilling, hydrogeology drilling, well the most by type
Or engineering geology drilling well, geothermal drilling, oil drilling, coal driling, ore field drilling well etc..In drilling process, target storage thing institute
Stratum be referred to as reservoir, reservoir, also known as reservoir, refers to have interconnected pore, allows target to gather thing to store wherein and ooze
The rock stratum of filter.As the heat reservori of geothermal well is mostly located in pore type, crack type and Karst-type heat reservori.And oil and gas reservoir is most
Number from sedimentary type formations, fractured mudstone and coal seam, due to the target such as water, oil gas, coal gathers that thing has can in multiple stratum all
There is storage, thus often run into the situation that not can determine that target gathers thing stratum at drilling process, bring difficulty, with ground for exploitation
As a example by hot well drilling well, the storage of pore type geothermal well heat is with Neogene System Ming Hua town (Nm) group Guantao group (Ng), Dongying Formation (Ed)
SHAHEJIE FORMATION (Es) is main, and stratum is flour sand, Extra-fine sand, fine sand, at oil-gas geology district oily, complex formation.Karst-type heat
Storing up and store up based on Ordovician limestone crack karst heat, there are Neogene System (N), Paleogene System (E), Permo-Carboniferous system (C+P) in superstratum.
Under above geological conditions, bury due to the Ordovician system and the most deeply easily cause limestone karst aplasia, or owing to the impact of structure is bored
Meeting stratum and can not see Ordovician limestone stratum, if pressing karst fissure type heat storage wellbore structure, Cheng Jinghou is without GEOTHERMAL WATER or underground heat
The water water yield is the least, owing to this above Neogene System in wellbore structure Ordovician limestone stratum, Paleogene System stratum need well cementation, water after well cementation
Measure the biggest geothermal water in porous aquifers to be not used, scrapping of geothermal well can be made, cause the biggest economic loss.
Utility model content
For solving the problems referred to above, this utility model people puts into practice through years of researches and wellbore structure, it is proposed that Yi Zhongshi
Wellbore structure when uncertain stratum, target reservoir place and device.Described wellbore structure is applicable to target collection thing to be had
Be likely to be present in two or more heat storage stratum in, but not can determine that be particularly located at first heat storage stratum in, second heat store up
Situation about all having in stratum or in the one the second heat storage stratum, utilizes structure of the present utility model can improve well completion rate, increases
Utilization rate, increases economic efficiency.
The technical scheme that this utility model is complete includes:
Well construction during a kind of uncertain stratum, target reservoir place, it is characterised in that described well construction includes: first
Level bore/first order sleeve pipe, second level bore/second level sleeve pipe, third level bore/third level sleeve pipe, fourth stage bore/4th
Level sleeve pipe, level V bore, send pipe joint connect third level sleeve pipe and be provided with hanger seat, hanger seat is installed with outstanding
The fourth stage sleeve pipe of hanging device, third level sleeve pipe is the most overlapping with second level sleeve pipe not less than 15m, and fourth stage sleeve pipe is hanged by hanger
Hanging on hanger seat, upper and lower side is fixed with expanded rubber, and fourth stage sleeve pipe is with filter tube or real pipe；Described one-level mouth
Footpath/first order sleeve pipe, second level bore/second level sleeve pipe, third level bore/third level sleeve pipe uses cementing concrete well cementation.
The cementing unit used by wellbore structure during described uncertain stratum, target reservoir place, it is characterised in that institute
The cementing unit stated includes sending pipe joint, hanger seat, hanger and expanded rubber, and described send pipe joint for connecting well casing
And hanger seat is installed, and described hanger seat installs the well casing with hanger, upper and lower side is fixed with expanded rubber, another
It is suspended on hanger seat by hanger.
Hanger is 10 °-30 ° with the tapering of hanger seat bound fraction, and keeps tapering consistent.
The method that well construction when utilizing above-mentioned uncertain stratum, target reservoir place and cementing unit carry out drilling well, probing
During to the first heat reservori stratum, if there being target to gather thing, not cementing the well, continuing to creep into deeper second heat reservori stratum
In, if there being target to gather thing in the second stratum, then to the first heat reservori stratomere well cementation, at the second stratum Cheng Jing, if the
Target is not had to gather thing, then to the first heat reservori stratum Cheng Jing in two heat reservori stratum.
Described well is geothermal well, the described pore type heat reservori that the first heat reservori stratum is not oily, described
Second heat reservori stratum is crack type heat reservori or karst heat reservori.
A kind of geothermal well boring method, be adapted to heat reservori uncertain time situation, it is characterised in that more than oil-gas Layer
Stratum, lower going-into-well keyholed back plate and the well casing equipped with hangoff receptacle are cemented the well, and hereafter continue to creep into pore type heat reservori by planned well structure
With karst heat reservori, application geophysical prospecting method well logging, if karst heat reservori is all grown aqueous, then type heat reservori in dead-end pore is aqueous
Section, exploits Karst Fissures type GEOTHERMAL WATER；If pore type heat reservori does not contains GEOTHERMAL WATER, then containing GEOTHERMAL WATER, karst heat reservori aplasia
Entering filter tube under pore type heat reservori water-bearing section, exploitation pore type heat reservori is aqueous.
Concrete operations are,
First order bore is drilled into the first well depth, under enter first order sleeve pipe well cementing of cement；
Second level bore is drilled into the second well depth, under enter API second level sleeve pipe to aperture well cementing of cement, mounted thereon anti-
Spray apparatus；
Third level bore is drilled into the 3rd well depth, under enter API third level sleeve pipe and overlapping with second level sleeve pipe not less than 15m,
And well cementing of cement, send pipe joint connection API third level sleeve pipe and hanger seat is installed；
Fourth stage bore is drilled into the 4th well depth, installs the API fourth stage sleeve pipe with hanger on hanger seat, and
Fourth stage sleeve pipe upper and lower side fixed expansion rubber, API fourth stage sleeve pipe is suspended on hanger seat by hanger；
Level V bore is drilled into design well depth.
Described API fourth stage sleeve pipe is with filter tube or real pipe.
This utility model is relative to the advantage of prior art:
1. gather thing for target to there may be present in two or more stratum, but not can determine that and be particularly located at the
Situation about all having in one heat storage stratum, in the second heat storage stratum or in the one the second stratum, stores up stratum when exploitation to first is hot
Time, do not use usual manner such as cementing concrete to cement the well, but use hanger or similar device, continue exploitation to the second heat storage ground
The whole hole of layer, if the second stratum is contained target and gathered thing, then uses well cementing of cement in the first heat storage stratum, takes the second heat storage
Collection thing in stratum, if the second heat storage stratum does not contains target and gathers thing, then at the first heat storage stratum Cheng Jing, takes first
Collection thing in heat storage stratum, is unlikely to make this well scrap, improves well completion rate, increase utilization rate, increase economic efficiency.
2. it is specific to oil-gas geology district uncertain heat reservori geothermal well wellbore structure, if Ordovician Karstified cranny development contains
GEOTHERMAL WATER, then dead-end pore water-bearing section (i.e. Neogene System or Paleogene System stratum), by Karst Fissures type Cheng Jing, exploit Karst Fissures
Water；If the aplasia of Ordovician Karstified crack does not contains GEOTHERMAL WATER, enter filter tube under hole water-bearing section, then press pore type Cheng Jing, exploitation
Hole is aqueous.Hole section is not cemented the well, if thus time Karst Fissures section is the most aqueous, be unlikely to this well and scrap.This wellbore structure reaches
Two purposes, i.e. can be used for recovery well and can also be used for pore type heat storage geothermal well and recharge.Simultaneously can be used for such heat reservori
(pore type and Karst-type) stratum, non-HYDROCARBON-BEARING REGION.
Accompanying drawing explanation
Fig. 1 is to show for oil-gas geology district uncertain heat reservori geothermal well wellbore structure in one embodiment of this utility model
Meaning.
Fig. 2 is this utility model oil-gas geology district uncertain heat reservori geothermal well wellbore structure of Fig. 1, by pore type underground heat
Well becomes well construction schematic diagram.
In figure: 1-first order bore；2-first order sleeve pipe；3-second level bore；4-second level sleeve pipe, 5-the 3rd
Level bore；6-third level sleeve pipe；7-fourth stage bore；8-fourth stage sleeve pipe；9-level V bore；10-cementing concrete；
11-send pipe joint；12-hanger；13 hanger seats；14-expanded rubber；15-filter tube.
Detailed description of the invention
With detailed description of the invention, this utility model is described further below in conjunction with the accompanying drawings.This utility model oil-gas geology
District's uncertain heat reservori geothermal well wellbore structure, is not limited by following example, can according to technical solutions of the utility model with
Strata condition determines specific embodiment.
Embodiment 1:
As shown in accompanying drawing 1,2, for oil-gas geology district uncertain heat reservori geothermal well wellbore structure, well construction is by the first order
Bore 1, second level bore 3, third level bore 5, fourth stage bore 7, level V bore 9, first order sleeve pipe 2, API second level set
Pipe 4, third level sleeve pipe 6, fourth stage sleeve pipe 8, filter tube 15, send pipe joint 11, hanger 12, hanger seat 13, expanded rubber
14, cementing concrete 10 forms, and first order bore/first order sleeve pipe, second level bore/API second level sleeve pipe, third level bore/
API third level sleeve pipe, fourth stage bore/API fourth stage sleeve pipe, level V bore composition wellbore structure, first order sleeve pipe, API
Second level sleeve pipe, API third level sleeve pipe with cementing concrete, send pipe joint 11 connection API third level sleeve pipe 6 and install hanger
Seat 13, API fourth stage sleeve pipe 8 is installed on hanger 12 upper and lower side fixed expansion rubber 14, and API the 4th pipe 8, filter tube 15 are pacified
It is loaded on hanger upper and lower side fixed expansion rubber 14, or, API fourth stage sleeve pipe 8, API fourth stage sleeve pipe 8/ filter tube
15 are suspended on hanger seat by hanger.
As in figure 2 it is shown, API fourth stage sleeve pipe 8/ filter tube 15 is suspended on hanger seat by hanger.
This utility model oil-gas geology district uncertain heat reservori geothermal well wellbore structure operation principle is: drilling well heat storage purpose
Layer is Karst-fissure water the oily section of dead-end pore heat storage, if Ordovician Karstified cranny development is containing GEOTHERMAL WATER, then blind hole
Gap water-bearing section (i.e. Neogene System or Paleogene System stratum), by Karst Fissures type Cheng Jing, exploits Karst-fissure water；If Ordovician Karstified splits
Gap aplasia does not contains GEOTHERMAL WATER, enters filter tube under hole water-bearing section, then press pore type Cheng Jing, and exploitation hole is aqueous.Except oily
The above outer hole section of cementing the well of section is not cemented the well, if Karst Fissures section is the most aqueous, is unlikely to this well and scraps.
Use oil-gas geology district uncertain heat reservori geothermal well wellbore structure method particularly includes:
This wellbore structure altogether Pyatyi, well completion method is: first order bore is drilled into the first well depth, under enter first order sleeve pipe water
Mud is cemented the well；Second level bore is drilled into the second well depth, under enter API second level sleeve pipe to aperture well cementing of cement, mounted thereon anti-
Spray apparatus；Third level bore is drilled into the 3rd well depth, under enter API third level sleeve pipe and overlapping with the second pipe not less than 15m, and cement is solid
Well, send pipe joint connection API third level sleeve pipe and installs hanger seat；Fourth stage bore is drilled into the 4th well depth, at hanger seat
Upper installation is with API fourth stage casing hanger, and at upper and lower side fixed expansion rubber, API fourth stage sleeve pipe passes through hanger
It is suspended on hanger seat；Level V bore is drilled into design well depth.
Embodiment 2:
In actual production, use uncertain heat reservori geothermal well wellbore structure, each construction ground hot well in Dongying, Weifang Prefecture
1 succeeds, and Weifang geothermal well is that the storage of karst heat is without GEOTHERMAL WATER, exploitation hole section GEOTHERMAL WATER, employing API pipe, filter tube peace
Dress hanger upper and lower side expanded rubber Cheng Jing, water yield 40m3/ h, water temperature 53 DEG C.Dongying geothermal well is that karst heat stores up section underground heat
Water, then dead-end pore section GEOTHERMAL WATER, use API pipe to install hanger upper and lower side expanded rubber Cheng Jing, water yield 70m3/ h, water
Temperature 73 DEG C.
Claims (3)
1. well construction during a uncertain stratum, target reservoir place, it is characterised in that described well construction includes: the first order
Bore/first order sleeve pipe, second level bore/second level sleeve pipe, third level bore/third level sleeve pipe, fourth stage bore/fourth stage
Sleeve pipe, level V bore, send pipe joint connect third level sleeve pipe and be provided with hanger seat, hanger seat installed with suspension
The fourth stage sleeve pipe of device, third level sleeve pipe is the most overlapping with second level sleeve pipe not less than 15m, and fourth stage sleeve pipe is hung by hanger
On hanger seat, upper and lower side is fixed with expanded rubber, and fourth stage sleeve pipe is with filter tube or real pipe；Described one-level bore/
First order sleeve pipe, second level bore/second level sleeve pipe, third level bore/third level sleeve pipe uses cementing concrete well cementation.
2. the cementing unit used by well construction during a kind of uncertain stratum, target reservoir place described in claim 1,
It is characterized in that, described cementing unit includes sending pipe joint, hanger seat, hanger and expanded rubber, the described pipe that send to connect
Head is used for connecting well casing and installing hanger seat, and described hanger seat installs the well casing with hanger, and upper and lower side is fixed
Having expanded rubber, another is suspended on hanger seat by hanger.
3. the cementing unit described in claim 2, it is characterised in that the tapering of hanger and hanger seat bound fraction is 10 °-
30 °, and keep tapering consistent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620558765.1U CN205823215U (en) | 2016-06-06 | 2016-06-06 | Well structure and device for uncertain target reservoir stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620558765.1U CN205823215U (en) | 2016-06-06 | 2016-06-06 | Well structure and device for uncertain target reservoir stratum |
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| Publication Number | Publication Date |
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| CN205823215U true CN205823215U (en) | 2016-12-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021102829A1 (en) * | 2019-11-28 | 2021-06-03 | 深圳大学 | Borehole wall protection assembly, device, and method |
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2016
- 2016-06-06 CN CN201620558765.1U patent/CN205823215U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021102829A1 (en) * | 2019-11-28 | 2021-06-03 | 深圳大学 | Borehole wall protection assembly, device, and method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |