CN107513379A - For blocking and repairing the liquid composite of well - Google Patents
For blocking and repairing the liquid composite of well Download PDFInfo
- Publication number
- CN107513379A CN107513379A CN201710696555.8A CN201710696555A CN107513379A CN 107513379 A CN107513379 A CN 107513379A CN 201710696555 A CN201710696555 A CN 201710696555A CN 107513379 A CN107513379 A CN 107513379A
- Authority
- CN
- China
- Prior art keywords
- well
- liquid composite
- repairing
- oil
- time
- 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.)
- Pending
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/514—Compositions based on water or polar solvents containing organic compounds macromolecular compounds of natural origin, e.g. polysaccharides, cellulose
Abstract
The present invention relates to oil and natural gas field, the more particularly to closing of well and the temporary transient closure of production layer.The liquid composite, by weight % are counted, and contain starch 20 25, magnesium chloride 18 20, ammonium hydrogen carbonate 20 25, anion surfactant 12, surplus 1:Kerosene+water of 1 ratio.Under high pressure and high temperature, oil well is blocked for a long time using the solution of minimum filtering in reservoir, thus reduces the time of development well after repairing and resuming work, and reduces the time of well operator scheme.
Description
Technical field
The present invention relates to oil and natural gas field, relates generally to the reparation work that Oil/gas Well is closed and production layer temporarily blocks
Make.
Background technology
As the main source of the energy now, the exploitation of petroleum gas and its related auxiliary facility are extensively closed in the industry always
Note, wherein, maintenance, temporary closure for oil well and gas well etc. are even more the emphasis that exploitation field endeavours to improve and strengthen always,
The perfect production efficiency and utilization ratio for limited energy resources of these operations is most important.
In early days, the composition component ratio (wt%) for temporary closure reservoir is as follows：Calcium carbonate 56-64%, hydroxide
Calcium 5-8%, surplus are water.The shortcomings that said composition, is a lack of architectural characteristic and desired mechanical performance, over time
Stability is poor, and the complexity of preparation is high.
Then, it is another it is conventional, be that a kind of well (Oil/gas Well) that is used for is repaired and by force with the immediate prior art of the present invention
The solution of change, the solution include starch, gel media, and such as bischofite (magnesium chloride), calcium chloride, calcium nitrate and alkali
The aqueous solution (alkali can be calcium hydroxide, sodium hydroxide, potassium hydroxide or ammonium hydroxide), wherein these components weigh in the following proportions
Gauge：Starch 0.5-10.0%, gel media 85-99.4%, surplus are the aqueous solution.The shortcomings that this method is due to that gelatinized corn starch exists
The specific viscosity reduced under the influence of temperature and the caused over-compressed during fluid column is formed, therefore in high temperature and high pressure
Under in layer is produced the solution there is high filtration.In addition, the time stability of the solution is poor, it is limited in long-time overhaul
In use.
The content of the invention
It is an object of the invention to provide a kind of liquid composite, it is characterised in that at elevated pressures and temperatures in reservoir with
The long-time of Oil/gas Well is closed with minimum filtering/infiltration.
To achieve these goals, Problems Existing in the prior art is overcome, the technical scheme is that：Offer mainly contains
There is the solution of starch and magnesium chloride, and can also the ammonium hydrogen carbonate containing following components percentage by weight, anionic surface work
Property agent and kerosene and water：
Starch 20-25,
Magnesium chloride 18-20,
Ammonium hydrogen carbonate 20-25,
Anion surfactant 1-2, and
Surplus is 1：Kerosene+water of 1 ratio (volume ratio).
Preparation application method for drilling well and the liquid composite of the invention for repairing well is as follows：
Starch, magnesium chloride, ammonium hydrogen carbonate, anion surfactant kerosene and water are mixed.By obtained liquid/molten
Liquid pump enters in well, then carries out maintenance work.
Wherein, above-mentioned raw materials of the invention are commercially available conventionally available material, sold on current market type it is cloudy from
Sub- surfactant (e.g., PAMA (APAM), higher fatty acids salt, Sulfonates, sulfuric acid, phosphoric acid
Ester salt etc.) it is used equally for the composition of the present invention.
Embodiment
Following examples are used merely to explain the present invention, and protection scope of the present invention is not intended to be limited to following implementation
Example.The purpose of the present invention can be achieved according to the disclosure in the those of ordinary skill of the technical field.
The experiment test (each embodiment, comparative example data are referred to described in table 1) of the solution of the present invention is in test facilities
Carry out, the test facilities are the double-molds to form the layer of sand that sand is classified as 1mm (high osmosis layer) and 0.25mm (less permeable layer)
Type.The physical dimension of the two-layer model of reservoir is：Long 0.46 meter, thick 0.06 meter and wide 0.08 meter；Open porosity is
25.7%, permeability is 1.78 μm2.All experimental studies are carried out under 0.75MPa constant differential pressure.Result of study is shown in
Table.
Table 1
As can be seen that providing the significant reduction more than 1000 times for the mortar of well and the solution of reparation from table 1 below
Absorption, this shows the extremely excellent efficiency of proposed composition.
Therefore, the present invention, which is used for drilling well, will not overflow the slot area of producing formation with the solution for repairing well, further, it is possible to
Effectively prevent the absorption of reservoir fluid in Oil/gas Well.The application of the solution of the present invention will be reduced to repair and resume work and developed afterwards
The time of used time of well and drilling well to operational mode.
It is described above, it is only the specific embodiment in the present invention, not the scope of the claims progress to the present invention is any
The limitation of form.It should be noted that it is every according to the present invention technical spirit above example is carried out it is any type of
Modification, change, improve or simply replace, still fall within protection scope of the present invention.
Claims (3)
1. the liquid composite for blocking and repairing well, it is characterised in that the liquid composite includes starch and magnesium chloride.
2. liquid composite according to claim 1, it is characterised in that the liquid composite also include ammonium hydrogen carbonate,
The mixture of anion surfactant and kerosene and water.
3. liquid composite according to claim 1 or 2, it is characterised in that the component that the liquid composite includes is pressed
The ratio of percentage by weight meter is as follows：
Starch 20-25,
Magnesium chloride 18-20,
Ammonium hydrogen carbonate 20-25,
Anion surfactant 1-2, and
Surplus is that ratio is 1:1 kerosene and water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710696555.8A CN107513379A (en) | 2017-08-15 | 2017-08-15 | For blocking and repairing the liquid composite of well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710696555.8A CN107513379A (en) | 2017-08-15 | 2017-08-15 | For blocking and repairing the liquid composite of well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107513379A true CN107513379A (en) | 2017-12-26 |
Family
ID=60722042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710696555.8A Pending CN107513379A (en) | 2017-08-15 | 2017-08-15 | For blocking and repairing the liquid composite of well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107513379A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019033546A1 (en) * | 2017-08-15 | 2019-02-21 | 泰州克罗米德机械设备有限公司 | Solution composition for blocking and repairing wells |
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| CN103589403A (en) * | 2013-10-29 | 2014-02-19 | 廖煜明 | Preparation method for heatproof salt-resistant well-drilling slurry processing agent |
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2017
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Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1989219A (en) * | 2004-07-22 | 2007-06-27 | 赫尔克里士公司 | Water-based drilling fluids |
| CN1766030A (en) * | 2004-10-29 | 2006-05-03 | 中国石油化工股份有限公司 | Positive electricity water-base pipe-freeing concentrate and its preparation method |
| CN101389729A (en) * | 2006-02-23 | 2009-03-18 | 赫尔克里士公司 | Ethoxylated raw cotton linters for completion and workover fluids |
| CN102408881A (en) * | 2011-10-17 | 2012-04-11 | 北京探矿工程研究所 | Drilling flushing fluid and preparation method thereof |
| CN102504788A (en) * | 2011-10-25 | 2012-06-20 | 中国石油天然气股份有限公司 | Foaming agent suitable for oil-field development |
| CN103589403A (en) * | 2013-10-29 | 2014-02-19 | 廖煜明 | Preparation method for heatproof salt-resistant well-drilling slurry processing agent |
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| CN104650827A (en) * | 2015-02-05 | 2015-05-27 | 长江大学 | Temperature-resistant microcross-linked tackifier and high-temperature-resistant solid-free water-based drilling fluid |
| CN104694092A (en) * | 2015-03-30 | 2015-06-10 | 中国石油大学(华东) | Water-based drilling fluid of shale gas horizontal well reinforced well wall and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2019033546A1 (en) * | 2017-08-15 | 2019-02-21 | 泰州克罗米德机械设备有限公司 | Solution composition for blocking and repairing wells |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171226 |