CN102464387A - Waste drilling fluid gel breaker system - Google Patents
Waste drilling fluid gel breaker system Download PDFInfo
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- CN102464387A CN102464387A CN2010105503009A CN201010550300A CN102464387A CN 102464387 A CN102464387 A CN 102464387A CN 2010105503009 A CN2010105503009 A CN 2010105503009A CN 201010550300 A CN201010550300 A CN 201010550300A CN 102464387 A CN102464387 A CN 102464387A
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- gel breaker
- drilling fluid
- waste drilling
- breaker system
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Abstract
The invention relates to a waste drilling fluid gel breaker system suitable for a low permeability oil-gas field, which comprises the following components in percentage by weight: 10 to 20 percent of calcium chloride, 5 to 10 percent of aluminum sulfate, 60 to 70 percent of ammonium base stearate and 10 to 20 percent of ammonium dibutyl naphthalene sulphonate. Due to the adoption of the composite gel breaker system, the zeta potential waste drilling fluid is reduced to within a range of 5mV, the aim of breaking a stable colloidal system of the waste drilling fluid is fulfilled, and waste drilling fluid particles are aggregated and precipitated to realize solid and fluid separation. In the composite gel breaker system, organic salt is used as the main component, so that the defect that the application of an inorganic salt gel breaker to increasing of the salt content of the waste drilling fluid is not beneficial to the environment is overcome, underground water is better protected, and the waste drilling fluid gel breaker system is more beneficial to repairing the soil of a well field.
Description
Technical field
The present invention relates to a kind of low-permeability oil gas field rejected well drilling liquid gel breaker system that is applicable to.
Background technology
Drilling fluid is a requisite working fluid in the oil and gas development, in drilling engineering, plays effects such as cutting carring, equilibrium pressure, cooling and lubricating drilling tool, transmission water power, mainly contains wilkinite, organic additive, water composition, is a kind of stable colloidal dispersion; The large-scale development of fld will produce a large amount of rejected well drilling liquids, and pollutent wherein causes certain harm to environment.Rejected well drilling liquid is handled, at first will be destroyed its stable colloidal suspension system, realize solid-liquid separation, reach the purpose of wastes reduction and waste water reuse.The low-permeability oil gas field is owing to protect the needs of reservoir, and drilling fluid colloidal dispersion is more stable, and water ratio is more than 90%, and intractability is bigger.
The rejected well drilling liquid gel breaker mainly adopts the inorganic salt gel breaker at present, comprises calcium salt, molysite etc.The inorganic salt gel breaker can destroy rejected well drilling liquid colloidal dispersion, reduces rejected well drilling liquid zeta current potential; But use the inorganic salt gel breaker to increase the saltiness in the rejected well drilling liquid, isolated water can't be realized utilizing or qualified discharge again, and the remaining solid thing can not be realized the reparation of soil, causes the salinization of soil behind the earthing landfill.
Summary of the invention
The purpose of this invention is to provide a kind of gel breaker system that can destroy rejected well drilling liquid colloidal dispersion; The gel breaker system is main with organic gel breaker; Inorganic gel breaker and organic gel breaker are mixed use or composite, give full play to the synergy of organic gel breaker and inorganic broken glue.This gel breaker system can obviously not increase the rejected well drilling liquid saltiness, makes to separate out water and can reuse, and is easy to realize the reparation to well site soil.Can not have a negative impact to environment.
Rejected well drilling liquid gel breaker system composition of the present invention is 10～20% calcium chloride by weight percentage; 5～10% Tai-Ace S 150; 60～70% AST and 10～20% has dibutyl naphthene sulfonic acid ammonium, and the organism composition by weight should be more than or equal to 80% in the gel breaker system.
The present invention is remarkable to the aqueous low-permeability oil of height gas field polymer drilling fluid system effect.To different systems, different blocks, the rejected well drilling liquid of different shelf-times, can in time adjust the system component ratio according to on-the-spot rejected well drilling liquid characteristic.The absolute value of discarding drilling well zeta current potential along with the increase of compound gel breaker dosage should reduce gradually, finally remains in the 5mv, and corresponding pH is reduced to about 7 by alkalescence.
Along with improving constantly of environmental requirement, in the waste drilling fluids disposal process, reduce disadvantageous effect to environment, avoid causing secondary pollution, be basic demand to oil-gas field development and HYDROCARBON-BEARING REGION environment protection.Therefore this environmentally friendly compound gel breaker has broad application prospects.
In sum, study a kind of rejected well drilling liquid gel breaker system that is suitable for the low-permeability oil gas field, this system not only can be destroyed the stable colloidal dispersion of rejected well drilling liquid; And do not increase the waste liquid saltiness; Make waste water obtain reuse, soil is easy to recover, and is favourable to Pollution abatement and environmental protection protection.
Starting material used in the present invention can be buied from market.
The effect of invention
In the weight concentration of rejected well drilling liquid gel breaker was 1～5% broad concentration range, rejected well drilling liquid zeta potential drop was to the 5mv, and pH reduces to about 7, and experiment effect is remarkable, and this system experiment effect influenced by environmental change less.
Embodiment
The objective of the invention is to adopt following mode to realize, be elaborated below in conjunction with embodiment and experimental example.
Embodiment 1
Under the normal temperature and pressure, the composite calcium chloride of 15%, 5%, 60%, 20% ratio, Tai-Ace S 150, AST, dibutyl naphthene sulfonic acid ammonium form compound gel breaker by weight percentage.Get rejected well drilling liquid 5kg, add compound gel breaker 0.5%, 1%, 2%, 3%, 5%, survey its zeta current potential and broken glue situation.
Table 1 adds rejected well drilling liquid zeta potential variation situation after the gel breakers of different amounts
Embodiment 2
Under the normal temperature and pressure, the composite calcium chloride of 10%, 5%, 65%, 20% ratio, Tai-Ace S 150, AST, dibutyl naphthene sulfonic acid ammonium form compound gel breaker by weight percentage.Get rejected well drilling liquid 5kg, add compound gel breaker 0.5%, 1%, 2%, 3%, 5%, survey its zeta current potential and broken glue situation.
Table 2 adds rejected well drilling liquid zeta potential variation situation after the gel breakers of different amounts
Claims (3)
1. rejected well drilling liquid gel breaker system is characterized in that: the gel breaker system is formed and is by weight:
Calcium chloride 10～20%
Tai-Ace S 150 5～10%
AST 60～70%
Dibutyl naphthene sulfonic acid ammonium 10～20%.
2. rejected well drilling liquid gel breaker system according to claim 1 is characterized in that: the organism composition by weight should be more than or equal to 80% in the gel breaker system.
3. the application of the described rejected well drilling liquid gel breaker of claim 1 system is characterized in that: be used for the broken glue of low-permeability oil gas field rejected well drilling liquid, its weight that adds rejected well drilling liquid is 1～5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105503009A CN102464387A (en) | 2010-11-18 | 2010-11-18 | Waste drilling fluid gel breaker system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105503009A CN102464387A (en) | 2010-11-18 | 2010-11-18 | Waste drilling fluid gel breaker system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102464387A true CN102464387A (en) | 2012-05-23 |
Family
ID=46068555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105503009A Pending CN102464387A (en) | 2010-11-18 | 2010-11-18 | Waste drilling fluid gel breaker system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102464387A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105499265A (en) * | 2015-12-17 | 2016-04-20 | 西南石油大学 | Land reclaimation technology for solid phases of waste water-based drilling fluid |
| CN106596476A (en) * | 2016-12-13 | 2017-04-26 | 中国石油集团川庆钻探工程有限公司 | Waste drilling fluid solid-liquid separation assessment method |
| CN110845038A (en) * | 2019-11-07 | 2020-02-28 | 中国石油天然气股份有限公司 | Dewatering method for waste water-based drilling fluid |
-
2010
- 2010-11-18 CN CN2010105503009A patent/CN102464387A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105499265A (en) * | 2015-12-17 | 2016-04-20 | 西南石油大学 | Land reclaimation technology for solid phases of waste water-based drilling fluid |
| CN105499265B (en) * | 2015-12-17 | 2019-02-22 | 西南石油大学 | Waste water-base drilling liquid solid formation land resource method |
| CN106596476A (en) * | 2016-12-13 | 2017-04-26 | 中国石油集团川庆钻探工程有限公司 | Waste drilling fluid solid-liquid separation assessment method |
| CN110845038A (en) * | 2019-11-07 | 2020-02-28 | 中国石油天然气股份有限公司 | Dewatering method for waste water-based drilling fluid |
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120523 |