CN101462851B - Retardation cement mortar - Google Patents

Retardation cement mortar Download PDF

Info

Publication number
CN101462851B
CN101462851B CN 200810049569 CN200810049569A CN101462851B CN 101462851 B CN101462851 B CN 101462851B CN 200810049569 CN200810049569 CN 200810049569 CN 200810049569 A CN200810049569 A CN 200810049569A CN 101462851 B CN101462851 B CN 101462851B
Authority
CN
China
Prior art keywords
water
urea
cement
cement slurry
percent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN 200810049569
Other languages
Chinese (zh)
Other versions
CN101462851A (en
Inventor
路群祥
张文玉
姚奕明
贾丽云
黄春燕
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Henan Oilfield Engineering Consulting Corporation
Petroleum Engineering Technology Research Institute of Sinopec Henan Oilfield Branch Co
Original Assignee
Petroleum Engineering Technology Research Institute of Sinopec Henan Oilfield Branch Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Petroleum Engineering Technology Research Institute of Sinopec Henan Oilfield Branch Co filed Critical Petroleum Engineering Technology Research Institute of Sinopec Henan Oilfield Branch Co
Priority to CN 200810049569 priority Critical patent/CN101462851B/en
Publication of CN101462851A publication Critical patent/CN101462851A/en
Application granted granted Critical
Publication of CN101462851B publication Critical patent/CN101462851B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Soil Conditioners And Soil-Stabilizing Materials (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention discloses retarded cement slurry. The retarded cement slurry comprises the following components in percentage by weight: 15 to 35 percent of urea, 0.01 to 0.1 percent of suspending agent, 30 to 65 percent of cement, and 19 to 35 percent of water. In the components of the cement slurry, the urea has the following functions: (1) the urea changes the nature of pure water as the urea molecules and water molecules form hydrogen bonds; and (2) the existence of the urea in the water reduces the chance of the contact between cement particles and water molecules which both have the function of settling retardation. The function of the suspending agent in the retarded cement slurry is to reduce the sedimentation and aggregation speed of the cement in the water for convenient inject via a pump. The retarded cement slurry can make the thickening time of the G-grade cement slurry at 40 DEG C reach 10 to 48 hours. The main technical indexes of the retarded cement slurry are as follows: the thickening time at 40 DEG C is between 10 and 48 hours; the compressive strength after solidification is between 4 and 27MPa; and the temperature resistance after solidification is more than or equal to 300 DEG C.

Description

Extended slurry
Technical field
The present invention relates to a kind of extended slurry, relate in particular to a kind of extended slurry that the anti-sand seal of oilwell water shutoff, water injection well profile control, thick oil thermal extraction such as scurries at the aspect that is used for, belong to oilfield chemistry water plugging and profile controlling field.
Background technology
At present, domestic and international oilfield water blockoff, Gu sand, the thick oil thermal extraction sand control, envelope is scurried and the water injection well in oil fields profile control, the permeable grout that uses that waits in shutoff coal seam, the shortcoming that the ubiquity multiviscosisty is fast, the general thickening time was less than 2 hours (G class g cement 40 ℃ of about 90 minutes of thickening times of slurry of water cement ratio 0.44), and use grout oilwell water shutoff, Gu sand, the thick oil thermal extraction sand control, envelope is scurried and the water injection well in oil fields profile control, the shutoff coal seam is permeable waits the site operation operation to need the infusion long period sometimes, be generally 5-10h, or because of mechanical fault have to stop operation the longer time, be generally 10-24h, and this often occurs pit shaft easily and shuts, oil pipe and subsurface tool such as can not pull out at major accident, even the danger that exists whole oil well to scrap, and may cause great financial loss thus.Can use retardant to solve this class problem at present, the retardant of report mainly comprises: weak organic acid class, lignosulfonic acid salt, gluconic acid salt etc., but its slow setting time is still short partially, can't resolve the problems referred to above.The Chinese patent communique discloses a kind of: publication number is the patent of invention " oil well cement retarder " of CN1513797, uses the grout of this retardant, the preparation of G class g cement, 45 ℃ of only 185 minutes thickening times.In addition, the Chinese patent communique also discloses a kind of: application number is 200610014885.6 patent of invention " cement setting retarder and application ", use the grout of retardant, the preparation of G class g cement, 40 ℃ of thickening times also have only 240 minutes, still have short problem of slow setting time.
Summary of the invention
The object of the present invention is to provide long extended slurry of a kind of slow setting time, shut the danger that oil pipe and subsurface tool can not pull out to solve the pit shaft that grout exists when the construction operation such as carry out water blockoff, the anti-sand seal of thick oil thermal extraction is scurried and water injection well profile control, shutoff coal seam be permeable.
For achieving the above object, the technical solution adopted in the present invention is an extended slurry, is made up of following components in weight percentage content: urea 15-35%, suspension agent 0.01-0.1%, cement 30-65%, water 19-35%.
Wherein, described suspension agent is any in organic polymer or the biopolymer, and suspension agent is the commercial goods.
Described cement is any or its combination in Portland cement or the oil well cement.
The compound method of extended slurry of the present invention is: weight percentage is to add the urea of 15-35%, the suspension agent of 0.01-0.1% in the water of 19-35%, and the cement that adds 30-65% after the stirring and dissolving again continues to stir and promptly gets extended slurry of the present invention.Suspension agent among the present invention can be any one commercially available suspension agent.
In the each component of the present invention, what urea played act as: (1) has changed the character of simple water because urea molecule and water molecules form hydrogen bond; (2) existence of urea in the water has reduced the chance that cement granules contacts with water molecules, and both all have the effect of slow setting.The effect that suspension agent is played in extended slurry of the present invention is to delay cement sedimentation accumulative speed in water, so that infusion.Extended slurry of the present invention can make reach 10-48 hour G class g cement 40 ℃ of thickening times of slurry.The key technical indexes of extended slurry of the present invention is: 40 ℃ thickening time 10-48 hour; It solidifies back ultimate compression strength 4-27Mpa; Heatproof after solidifying 〉=300 ℃.
Embodiment
Embodiment 1
Extended slurry of the present invention is prepared from by following components in weight percentage content: urea: 23.4%, and melon glue: 0.05%, the G class g cement: 53%, water: 23.55%.Melon glue in this enforcement is suspension agent.
40 ℃ of thickening time>48 hour (initial consistency 2.6Bc, denseness 0.8Bc after 48 hours); Reinstall mould and wait taking-up in 3 days with fixed attention, ultimate compression strength 12.4MPa.
Embodiment 2
Extended slurry of the present invention is prepared from by following components in weight percentage content: urea: 21.2%, and melon glue: 0.05%, the G class g cement: 57.7%, water: 21.05%.
40 ℃ of thickening time>18 hour (initial consistency 3.3Bc, denseness 6.2Bc after 18 hours); Reinstall mould and wait taking-up in 3 days with fixed attention, ultimate compression strength 15.4MPa.
Embodiment 3
Extended slurry of the present invention is prepared from by following components in weight percentage content: urea: 19.2%, and melon glue: 0.1%, the G class g cement: 61.4%, water 19.3%.
40 ℃ of thickening time>10 hour (initial consistency 3.6Bc, denseness 8.8Bc after 10 hours); Reinstall mould and wait taking-up in 3 days with fixed attention, ultimate compression strength 17.5MPa.
During site operation, in stirred pot, be metered into water, urea, suspension agent by prescription, be stirred to dissolving, be metered into cement again, continue to stir, pump into spearhead, extended slurry, displacing liquid according to this with squeeze note pump or cementing truck, afterwards anti-flushing well, take that steam treatment is short coagulates or heat up automatically to wait and can determine as the case may be with fixed attention in the closing well stratum.
It should be noted last that: above embodiment is only in order to explanation, and unrestricted technical scheme of the present invention, although the present invention is had been described in detail with reference to the foregoing description, those of ordinary skill in the art is to be understood that: still can make amendment or be equal to replacement the present invention, and not breaking away from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.

Claims (2)

1. an extended slurry is characterized in that: be made up of following components in weight percentage content: urea 15-35%, suspension agent 0.01-0.1%, G class g cement 30-65%, water 19-35%.
2. extended slurry according to claim 1 is characterized in that: described G class g cement is a G level oil well cement.
CN 200810049569 2008-04-18 2008-04-18 Retardation cement mortar Active CN101462851B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200810049569 CN101462851B (en) 2008-04-18 2008-04-18 Retardation cement mortar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200810049569 CN101462851B (en) 2008-04-18 2008-04-18 Retardation cement mortar

Publications (2)

Publication Number Publication Date
CN101462851A CN101462851A (en) 2009-06-24
CN101462851B true CN101462851B (en) 2011-08-31

Family

ID=40803676

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200810049569 Active CN101462851B (en) 2008-04-18 2008-04-18 Retardation cement mortar

Country Status (1)

Country Link
CN (1) CN101462851B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105000819B (en) * 2015-08-06 2017-03-29 济南大学 A kind of retarder suitable for sulphate aluminium cement
CN107842339A (en) * 2016-09-18 2018-03-27 中国石油天然气股份有限公司 Oil-water well ash injection method
CN107459322A (en) * 2017-09-23 2017-12-12 江苏昶浩建材有限公司 A kind of extended slurry

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1513797A (en) * 2002-12-31 2004-07-21 中国石油化工股份有限公司 Oil well cement slow coagulation agent

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1513797A (en) * 2002-12-31 2004-07-21 中国石油化工股份有限公司 Oil well cement slow coagulation agent

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
赵林.油井水泥缓凝剂的合成与性能研究.《武汉工业大学学报》.1998,第20卷(第4期),25-27. *

Also Published As

Publication number Publication date
CN101462851A (en) 2009-06-24

Similar Documents

Publication Publication Date Title
CN100344723C (en) Comprehensive performace regulator for well cementing cement slurry and its prepn
CN103232839B (en) Water shutoff agent applicable to high-temperature high-salt oil reservoir water shutoff profile control
CN103865503B (en) High temperature resistant inorganic granulated gel compounds double-liquid seal blocking agent and method for blocking thereof
CN102504775B (en) Large temperature difference cement slurry for cementing of deep well long isolation section and preparation method thereof
CN104099071A (en) Horizontal well cementing expansion cement slurry and preparation method thereof
CN105368423B (en) One kind is recovered the oil and uses Chrome-free compound resin gel-like profile control agent and preparation method and purposes
CN104927816B (en) A kind of organic profile control agent and preparation method thereof and purposes
CN103773334A (en) Leaking stoppage reinforcing agent
CN105062442A (en) Thickened oil thermal recovery channeling sealing agent, channeling sealing agent thick liquid, preparation method of thick liquid and thickened oil thermal recovery profile control channeling sealing method
CN106433590A (en) Casing damage leakage well high-efficiency phenolic resin water plugging agent and application thereof
CN101462851B (en) Retardation cement mortar
CN101234871A (en) High temperature resistant cement mortar
CN107915455A (en) The compound outstanding sand agent of grout filling and its preparation and application
CN101016451A (en) Compositions and preparation and use thereof
CN104291733A (en) Toughened anti-channeling agent for cement and toughened cement for cementing shale gas horizontal well
CN116103027A (en) Liquid bridge plug and preparation method and application thereof
US20150191643A1 (en) Use of catalyst composition for cementing a wellbore and cement slurry for the same
CN104045271B (en) A kind of sealing agent for oil field or natural gas extraction and preparation method thereof
CN101240163A (en) Oil well cement swelling agent
CN103864381A (en) Cement-based inorganic anchor adhesive and preparation method thereof
CN106046753A (en) Corrosion-resistant hydrophilic polyurethane composite grouting fluid and preparation method thereof
CN102585787A (en) Efficient urea-formaldehyde resin plugging agent and application thereof
CN101537663A (en) Preparation method of high temperature resisting cement grout
CN102911650A (en) High-strength composite plugging system for plugging pipe flow channel and preparation method thereof
CN104140795A (en) Composite plugging agent used for oil well water plugging and preparing method thereof

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
ASS Succession or assignment of patent right

Owner name: HE NAN OILFIELD ENGINEERING CONSULTING CORPORATION

Effective date: 20120803

C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20120803

Address after: Nanyang City, Henan province 473132 Songshan Guanzhuang town Wancheng District No. 8 East Road, South Road

Co-patentee after: Henan Oilfield Engineering Consulting Corporation

Patentee after: Petroleum Engineering Technology Inst. Henan Oli Field Branch China Petrochemica

Address before: Nanyang City, Henan province 473132 Songshan Guanzhuang town Wancheng District No. 8 East Road, South Road

Patentee before: Petroleum Engineering Technology Inst. Henan Oli Field Branch China Petrochemica