CN1183453A - Slag based cementing material for oil well and terrestrial heat well - Google Patents
Slag based cementing material for oil well and terrestrial heat well Download PDFInfo
- Publication number
- CN1183453A CN1183453A CN 96117803 CN96117803A CN1183453A CN 1183453 A CN1183453 A CN 1183453A CN 96117803 CN96117803 CN 96117803 CN 96117803 A CN96117803 A CN 96117803A CN 1183453 A CN1183453 A CN 1183453A
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- China
- Prior art keywords
- slag
- oil well
- well
- base oil
- geothermal
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
A steelslag-base cementing materail for oil well or geothermic well is prepared from steeslag (20-80%), silicon material (10-80%) and modifying material (0-50%), and features high strength increased with well depth, easy preparing, proper cementing speed, and low cost.
Description
The present invention is a kind of oil well and geothermal well injection material, particularly based on the slag base oil well and the geothermal well gelling material of slag.
The exploitation of oil well and geothermal well needs a large amount of oil wells and geothermal well cement as injection material.Present oil well and geothermal well cement are the gelling material based on traditional Portland clinker, as Chinese patent 92108581.8 described " high flowability, the cement grouting material of microdilatancy ".This material is main consolidating material with ordinary Portland cement, being equipped with the common building that meets certain particle diameter and grating constitutes with sand and a small amount of swelling agent, water reducer, because Portland clinker needs calcining at high temperature, therefore, energy consumption height, complex process, cost are higher, so the injection material cost height that adopts this technology to produce; Simultaneously, under the hydrothermal condition of High Temperature High Pressure, this injection material condenses too fast in oil well and geothermal well, and easily forms C
2SH hydrated product and cause strength retraction makes structure crack.
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art, providing a kind of is main raw material with the slag, make the slag base oil well and the geothermal well gelling material of grouting usefulness, the gelling material cost of gained is low simultaneously, technology is simple, along with well depth increases and time lengthening, its not only not retraction of intensity improves on the contrary.
Solution of the present invention is: a kind of slag base oil well and geothermal well gelling material is characterized in that forming by following proportioning (weight percent, down together):
Slag 20～80%,
Siliceous material 10～80%,
Material modified 0～50%.
Slag is a kind of industrial residue, belongs to CaO-SiO
2-Al
2O
3-Fe
2O
3-FeO-MgO system, mineral are mainly with C
3S, C
2S, CMS, C
3MS
2With KO form existence mutually.Under the normal temperature, C
3S, C
2S has certain hydraulicity, and CMS, C
3MS
2With KO aquation and do not have gelling not mutually.But under the high temperature and high pressure environment of oil well and geothermal well, certain material modified of admixture, CMS, C
3MS
2But, KO mutually hydro-thermal close and form hydrated product and have gelling.No matter the KO that exists with the sosoloid form is wustite FeO mutually, still the hydro-thermal reaction of the sosoloid of MgO-FeO-MnO formation does not all cause expansion, by a certain amount of siliceous material of admixture and material modified, the hydrothermal product that makes slag base oil well and geothermal well gelling material is based on xonotlite or hold in the palm vigorous mullite, along with well depth increases (temperature, pressure raise) and time lengthening, this not only not retraction of gelling material intensity improves on the contrary.Simultaneously, also can change the ratio of component, to adapt to the needs of different well depth environment.Can select different proportionings according to the difference of well depth in the solution of the present invention.Proportioning to common oil well can be selected for use:
Slag: 20～60%,
The oil well cement grog: 20～70%,
Material modified: 10～30%.
Its material modified quartz sand, flyash or SiO of adopting
2Content is greater than 90% yellow ground.
Proportioning to geothermal well and ultra deep well in the solution of the present invention can be used earlier:
Slag: 30～80%,
Siliceous material: 20～50%,
Material modified: 0～50%.
Its siliceous material can adopt SiO
2Content is greater than 90% yellow ground or adopt quartz sand, material modified oil well cement grog or the calcareous material of adopting.Among the present invention, adding material modifiedly, mainly is that the difference according to well depth makes the calcium silicon of gelling material than in 0.8～1.5 scope.Gelling material of the present invention be with by the each component material of proportioning on request fineness mix.
The present invention's advantage compared with prior art: the present invention is based on slag, admixture siliceous material and material modified, and corresponding cost is low, produces simply, and has overcome existing oil well cement will condense too fast and shortcoming strength degradation.The not only not retraction of prepared gelling material intensity increases with well depth on the contrary and time lengthening is improved.
The embodiment of the invention is as follows:
Embodiment 1: slag base oil well and geothermal well gelling material are by slag: 35%, and oil well cement grog 50%, quartz sand 15% constitutes.
Its performance index: stability 0.5%, free water content 1.52ml, 8 hours ultimate compression strength, 38 ℃ of following 2.5mpa, 60 ℃ of following 11.4mpa, thickening time: 110min.
Embodiment 2: slag base oil well and geothermal well gelling material be by slag 60%, oil well cement grog 20%, SiO
2Content constitutes greater than 90% yellow ground 20%.
Its performance index: stability 0.65%, free water content 1.38ml, 8 hours ultimate compression strength: 38 ℃ of following 2.8mpa, 60 ℃ of following 11.8mpa, thickening time 112min.
Embodiment 3: slag base oil well and geothermal well gelling material be by slag 55%, oil well cement grog 30%, and flyash 15% constitutes.
Its performance index: stability 0.58%, free water content: 1.23ml, 8 hours ultimate compression strength: 38 ℃ of following 2.6mpa, 60 ℃ of following 11.3mpa, thickening time 108min.
Embodiment 4: slag base oil well and geothermal well gelling material are by slag 55%, and SiO2 content constitutes greater than 90% yellow ground 45%.
Its performance index are: 12 hours ultimate compression strength 4.5mpa, 24 hours ultimate compression strength 7.5mpa, thickening time 190min.
Embodiment 5: slag base oil well and geothermal well gelling material be by slag 30%, flyash 30%, and calcareous material 40% constitutes.
Its performance index: 12 hours ultimate compression strength 4.8mpa, 24 hours ultimate compression strength 8.2mpa, thickening time 193min.
Claims (8)
1, a kind of slag base oil well and geothermal well gelling material is characterized in that forming by following proportioning (weight percent, down together):
Slag: 20～80%
Siliceous material: 10～80%
Material modified: 0～50%.
2, slag base oil well according to claim 1 and geothermal well gelling material is characterized in that each component is by following composition of proportions:
Slag: 20～60%,
Oil well cement grog (siliceous material): 20～70%,
Material modified: 10～30%.
3, slag base oil well according to claim 1 and geothermal well gelling material is characterized in that each component is by following composition of proportions:
Slag: 30～80%,
Siliceous material: 20～50%,
Material modified: 0～50%.
4, slag base oil well according to claim 2 and geothermal well gelling material is characterized in that each component is by following composition of proportions:
Slag: 35%,
The oil well cement grog: 50%,
Quartz sand: 15%.
5, slag base oil well according to claim 2 and geothermal well gelling material is characterized in that each component is by following composition of proportions:
Slag: 60%,
The oil well cement grog: 20%,
SiO
2Content is greater than 90% yellow ground: 20%.
6, slag base oil well according to claim 2 and geothermal well gelling material is characterized in that each component is by following composition of proportions:
Slag: 55%,
The oil well cement grog: 30%,
Flyash: 15%.
7, slag base oil well according to claim 3 and geothermal well gelling material is characterized in that each component is by following composition of proportions:
Slag: 55%,
Yellow ground (siliceous material): 45%.
8, slag base oil well according to claim 3 and geothermal well gelling material is characterized in that each component is by following composition of proportions:
Slag: 30%,
Flyash (siliceous material): 30%,
Calcareous material (material modified): 40%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96117803 CN1183453A (en) | 1996-11-26 | 1996-11-26 | Slag based cementing material for oil well and terrestrial heat well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96117803 CN1183453A (en) | 1996-11-26 | 1996-11-26 | Slag based cementing material for oil well and terrestrial heat well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1183453A true CN1183453A (en) | 1998-06-03 |
Family
ID=5124621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96117803 Pending CN1183453A (en) | 1996-11-26 | 1996-11-26 | Slag based cementing material for oil well and terrestrial heat well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1183453A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102002352A (en) * | 2010-09-29 | 2011-04-06 | 中国石油化工集团公司 | Steel slag cement slurry for oilfield well cementation |
| FR2997946A1 (en) * | 2012-11-15 | 2014-05-16 | Soletanche Freyssinet | GROUT FOR GEOTHERMIC PROBES |
| CN112408881A (en) * | 2020-11-20 | 2021-02-26 | 成都理工大学 | Temporary plugging type high-permeability porous cement-based material suitable for medium-low temperature geothermal well and preparation method thereof |
-
1996
- 1996-11-26 CN CN 96117803 patent/CN1183453A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102002352A (en) * | 2010-09-29 | 2011-04-06 | 中国石油化工集团公司 | Steel slag cement slurry for oilfield well cementation |
| FR2997946A1 (en) * | 2012-11-15 | 2014-05-16 | Soletanche Freyssinet | GROUT FOR GEOTHERMIC PROBES |
| EP2733129A2 (en) | 2012-11-15 | 2014-05-21 | Soletanche Freyssinet | Grout for geothermal probes |
| EP2733129A3 (en) * | 2012-11-15 | 2016-08-03 | Soletanche Freyssinet | Grout for geothermal probes |
| CN112408881A (en) * | 2020-11-20 | 2021-02-26 | 成都理工大学 | Temporary plugging type high-permeability porous cement-based material suitable for medium-low temperature geothermal well and preparation method thereof |
| CN112408881B (en) * | 2020-11-20 | 2021-08-31 | 成都理工大学 | Temporary plugging type high-permeability porous cement-based material suitable for medium-low temperature geothermal well and preparation method thereof |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |