CN101915068A - Method for treating cementing slurry cleaning liquid - Google Patents
Method for treating cementing slurry cleaning liquid Download PDFInfo
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- CN101915068A CN101915068A CN2010102625377A CN201010262537A CN101915068A CN 101915068 A CN101915068 A CN 101915068A CN 2010102625377 A CN2010102625377 A CN 2010102625377A CN 201010262537 A CN201010262537 A CN 201010262537A CN 101915068 A CN101915068 A CN 101915068A
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- cleaning liquid
- density
- weighting material
- treating
- cementing slurry
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Abstract
The invention discloses a method for treating a cementing slurry cleaning liquid. In the method, a superfine weighting material is added into the cementing slurry cleaning liquid, so that the density of the cleaning liquid is approximately equal to the equivalent density of formation porosity. By adding the superfine weighting material of greater than or equal to 1,200 meshes into the cleaning liquid, the problems of weighting, suspension, low viscosity and easy turbulence displacement are solved by using the suspending powder of the superfine weighting material. In addition, the density of the cleaning liquid is made close to the equivalent density of the formation porosity, the accidents of overflow and even blowout caused by down-hole liquid column pressure loss are prevented, and meanwhile, the reservoir stratum is prevented from being polluted by differential pressure water loss. Thus, by the method for treating the cementing slurry cleaning liquid of the invention, the cleaning liquid has the double effects of ensuring the cleaning effect and balancing the formation pressure.
Description
Technical field
The present invention relates to a kind of in high-pressure well well cementation the processing method of employed cementing slurry cleaning liquid.
Background technology
After cementing slurry was by mud contamination, its intensity reduced, and the pumpability variation has had a strong impact on cementing operation safety and well cementation bonding quality.
Adopt traditional cleaning fluid (density is equivalent to the density of water) to clean the borehole wall at present, though cleaning performance is good, the density of cleaning fluid and mud density difference are too big, and be under-voltage easily, causes the well kick blowout; In traditional cleaning fluid, increase the weight of, cause the obstruction of weighting material precipitation easily, cause construction accident; In traditional cleaning fluid, add tackifier and weighting material,, greatly reduce cleaning performance though solved the suspension problem.
Summary of the invention
Problem at prior art exists the object of the present invention is to provide a kind of method for treating cementing slurry cleaning liquid, can either effectively dilute, clean the down-hole high-density slurry, again can equilibrium strata pressure.
A kind of method for treating cementing slurry cleaning liquid of the present invention is to add ultra-fine weighting material in cleaning fluid, and the density that makes cleaning fluid is the formation pore equal yield density.
Preferably, the particle diameter of described ultra-fine weighting material is more than or equal to 1200 orders.
Preferably, described ultra-fine weighting material is selected ultra-fine Iron Ore Powder and/or barite and/or manganese ore powder for use.
The present invention is greater than or equal to the ultra-fine weighting material of 1200 purposes by add the order number in cleaning fluid, like this, just can utilize self suspending power of ultra-fine weighting material, has solved and has increased the weight of, suspends and a low difficult problem of gluing, easy turbulence replacement.In addition, the density by making cleaning fluid has played the accident that the head of liquid loss of anti-down-hole causes overflow even blowout near the formation pore equal yield density, and reservoir is polluted in anti-simultaneously pressure reduction dehydration.Therefore, weighted mud cleaning fluid processing method of the present invention makes cleaning fluid can have the double effects of " guaranteeing cleaning performance and equilibrium strata pressure ".
The specific embodiment
Method for treating cementing slurry cleaning liquid of the present invention specifically is to add particle diameter and be greater than or equal to the ultra-fine weighting material of 1200 purposes in cleaning fluid.In embodiments of the present invention, weighting material can be selected Iron Ore Powder or manganese ore powder or barite.Cleaning fluid is selected conventional cleaning fluid for use.Owing to select for use particle diameter to be greater than or equal to the ultra-fine weighting material of 1200 purposes, like this, on the one hand, by adding weighting material, the density that can make cleaning fluid is near the formation pore equal yield density, thereby played the effect of anti-pressure reduction dehydration.On the other hand, by with the fine size of ultra-fine weighting material to 1200 orders even thinner, make ultra-fine weighting material under the situation of not adding tackifier, also can reach good suspension effect.Add tackifier owing to no longer add tackifier or minute quantity, played low glue dilution and the easily effect of turbulent flow cleaning.Like this, method for treating cementing slurry cleaning liquid of the present invention just simultaneously can effectively dilute, clean the down-hole high-density slurry, again can equilibrium strata pressure, have well the double effects of " assurance cleaning performance and equilibrium strata pressure ".
Claims (3)
1. well cementation weighted mud cleaning fluid processing method, this method is to add ultra-fine weighting material in cleaning fluid, makes the density of cleaning fluid approximate the formation pore equal yield density.
2. the method for claim 1 is characterized in that, the particle diameter of described ultra-fine weighting material is more than or equal to 1200 orders.
3. method as claimed in claim 1 or 2 is characterized in that, described ultra-fine weighting material is selected ultra-fine Iron Ore Powder and/or barite and/or manganese ore powder for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102625377A CN101915068A (en) | 2010-08-24 | 2010-08-24 | Method for treating cementing slurry cleaning liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102625377A CN101915068A (en) | 2010-08-24 | 2010-08-24 | Method for treating cementing slurry cleaning liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101915068A true CN101915068A (en) | 2010-12-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102625377A Pending CN101915068A (en) | 2010-08-24 | 2010-08-24 | Method for treating cementing slurry cleaning liquid |
Country Status (1)
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| CN (1) | CN101915068A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1635046A (en) * | 2003-12-30 | 2005-07-06 | 湖北汉科新技术股份有限公司 | High density double-acting ahead fluid and method for preparing same |
| CN1745157A (en) * | 2002-12-02 | 2006-03-08 | 马奎斯流体股份有限公司 | Emulsified polymer drilling fluid and methods of preparation and use thereof |
| CN1858146A (en) * | 2005-12-26 | 2006-11-08 | 西南石油学院 | Anti-pollution high efficiency isolation liquid and preparing method |
-
2010
- 2010-08-24 CN CN2010102625377A patent/CN101915068A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1745157A (en) * | 2002-12-02 | 2006-03-08 | 马奎斯流体股份有限公司 | Emulsified polymer drilling fluid and methods of preparation and use thereof |
| CN1635046A (en) * | 2003-12-30 | 2005-07-06 | 湖北汉科新技术股份有限公司 | High density double-acting ahead fluid and method for preparing same |
| CN1858146A (en) * | 2005-12-26 | 2006-11-08 | 西南石油学院 | Anti-pollution high efficiency isolation liquid and preparing method |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20101215 |