CN102086085A - Method for solidifying drilling waste slurry - Google Patents
Method for solidifying drilling waste slurry Download PDFInfo
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- CN102086085A CN102086085A CN2009102166000A CN200910216600A CN102086085A CN 102086085 A CN102086085 A CN 102086085A CN 2009102166000 A CN2009102166000 A CN 2009102166000A CN 200910216600 A CN200910216600 A CN 200910216600A CN 102086085 A CN102086085 A CN 102086085A
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Abstract
The invention relates to a method for solidifying drilling waste slurry, which comprises the following steps of: adding 100ml of drilling waste slurry into a plastic cup, adding 20g of cement and 10g of fly ash with uniform stirring, adding 0.5 to 3.5g of destabilizing agent, and measuring the chemical oxygen demand (CODcr), pH value and strength of solidified body extract. By the method, a good effect of reducing the CODcr and pH value of the drilling waste slurry is achieved; meanwhile, a solidification product has certain compression strength.
Description
Technical field
The present invention relates to drilling well discarded slurry solidification processing method.
Background technology
Solid waste is meant solid and gunk or the on-aqueous liquid because of no longer needing to be dropped in human being's production, life.The solid waste that the oil field is produced in the exploratory development process mainly contains drilling well discarded slurry, landwaste and oil sludge and sand.Drilling mud is to satisfy the required various circulating fluid of drilling well work with its multiple function in the petroleum gas drilling process, be used for technological processs such as petroleum prospecting, drilling well, exploitation, mainly play the drilling cuttings that carries, suspends, stabilizing borehole, equilibrium strata pressure, the effect of cooling, lubricated bit drilling tool.It is a kind of heterogeneous stable colloid system that contains clay, high-density weighting material, all kinds of chemical processing agent, sewage, sump oil and drilling cuttings, wherein contains a large amount of inorganic salt, macromolecular organic compound, some heavy metal ion (as mercury, arsenic, cadmium, chromium, lead) etc.After drilling operation is finished, in the waste liquid of drilling pond in well site, can produce the drilling wastes of some amount, per-well production is at 700～1500m
3About, drilling waste mud is formed complicated, generally is alkalescence, and the pH value is between 8.5～12; Generally between 0.01 μ m～0.3 μ m, the water ratio height is difficult for characteristics such as dehydration to the solid phase particles granularity, and its dry and hard naturally process is slow; Waste mud oleaginousness height, part drilling waste mud oleaginousness reaches more than 10%; Owing to contain various organic and mineral-type chemical processing agent in the drilling waste mud, concentration of narmful substances such as heavy metal wherein, CODcr and tensio-active agent are higher in addition, and indivedual nuisance contamination indexs exceed hundreds of times of country's permission emission concentration.If reasonably do not handled and disposed, the seepage of drilling well discarded slurry, leak, will cause the severe contamination of the face of land, lithic drainage, cause the destruction of well site periphery ecotope.Environmental problem and environmental pollution will directly have influence on the normal operation of oil-gas field development.Along with the increasingly stringent of country to environmental requirement, successively carry out in country under the big situation of big several times " environmental protection storm ", local government has also strengthened the supervision to pollutent that the oil field produces, and requirement must be carried out processing up to standard.
Because in engineering construction probing and petroleum drilling; the capital produces a large amount of discarded slurries; these discarded slurries not only influence construction but also pollute bad border; therefore waste mud being handled and rationally utilized is a job highly significant; its energy decontamination, the protection environment is turned harm into good; reduce the mud expense, farthest reduce the duplication of labour.At the harmless treatment and the disposal of waste drilling mud, Oilfield Company has all given the concern of height both at home and abroad.Existing treatment technology comprises: inject sealing in safe formation or well annular space, backfill processing, the hole, solidification treatment and soil cultivating method etc.Domestic Oilfield Company has generally adopted cement-based solidified technology to carry out the oilfield waste drilling mud and has administered.But the composition of drilling mud is difference to some extent with the difference of region and well depth, thereby causes the also difference to some extent of composition in the waste drilling mud, shows that the character of waste drilling mud is changeable, and solid phase proportion is not equal.Existing curing technology can be controlled the CODcr of solidified slip preferably, but the pH value is higher, is difficult to reach national specified discharge standard.In addition, the cost of existing curing technology is higher usually, is difficult to reach balance economically.Particularly low density slurries because its solid load is few, needs to add more treatment agent and just can reach environmental protection requirement, thereby increased the curing cost in the solidification process, and the difficulty of solidifying construction is strengthened.In processed solid waste, often contain the material that hinders hydration, intensity is little sometimes only to handle cured body with ordinary Portland cement, and physics, chemical property are also unstable.In this case, just need to add suitable coagulant.It can be absorbed with harmful substances and promote it to solidify, and the consumption of cement also can reduce.
Summary of the invention
The technical problem to be solved in the present invention has provided a kind of drilling well discarded slurry solidification processing method, can not only control the perviousness of toxic substance, and solidified after-product has certain compression strength.
The technical scheme that the present invention solve the technical problem employing is:
Drilling well discarded slurry solidification processing method may further comprise the steps:
Get drilling well discarded slurry 100ml in plastic cup,, add the 0.5-3.5g coagulant again, measure CODcr, pH value and the intensity of cured body leach liquor evenly adding cement 20g and flyash 10g under the stirring action.
Described coagulant is a ferric sulfate.
Described coagulant is a zinc sulfate.
Described coagulant is a sal epsom.
Preferably, described coagulant consumption is 3.0g.
The invention has the beneficial effects as follows:
The present invention is by adding different types of coagulant in the drilling well discarded slurry, adjust the consumption of various coagulants, measure CODcr, pH value and the intensity of cured body leach liquor under the different coagulants, CODcr and pH value in the reduction drilling well discarded slurry are all had better effects.Cured product also has certain compression strength simultaneously.
Embodiment
Embodiment 1
Drilling well discarded slurry solidification processing method may further comprise the steps:
Get drilling well discarded slurry 100ml in plastic cup,, add the 0.5-3.5g coagulant again, measure CODcr, pH value and the intensity of cured body leach liquor evenly adding cement 20g and flyash 10g under the stirring action.
Described coagulant is a ferric sulfate.
Preferably, described coagulant consumption is 3.0g.
The solidification effect that adds zinc sulfate sees Table 1.
Table 1 adds the solidification effect of zinc sulfate
| Zinc sulfate g | Cement g | Flyash g | COD?mg/L | pH | Intensity Mpa |
| 0.5 | 20 | 10 | 648.6 | 13.6 | 0.8 |
| 1.0 | 20 | 10 | 602.2 | 12.3 | 0.7 |
| 1.5 | 20 | 10 | 576.4 | 11.7 | 0.7 |
| 2.0 | 20 | 10 | 589.6 | 10.9 | 0.8 |
| 2.5 | 20 | 10 | 456.8 | 10.4 | 0.7 |
| 3.0 | 20 | 10 | 425.5 | 9.3 | 0.9 |
| 3.5 | 20 | 10 | 388.2 | 8.7 | 0.8 |
Embodiment 2
Coagulant is selected sal epsom, and all the other are with embodiment 1.The solidification effect that adds sal epsom sees Table 2.
Table 2 adds the solidification effect of sal epsom
| Sal epsom g | Cement g | Flyash g | COD?mg/L | pH | Intensity Mpa |
| 0.5 | 20 | 10 | 527.6 | 13.2 | 0.6 |
| 1.0 | 20 | 10 | 503.3 | 12.6 | 0.9 |
| 1.5 | 20 | 10 | 473.7 | 12.3 | 0.7 |
| 2.0 | 20 | 10 | 452.9 | 11.8 | 0.8 |
| 2.5 | 20 | 10 | 417.3 | 10.4 | 0.9 |
| 3.0 | 20 | 10 | 391.5 | 10.8 | 0.9 |
| 3.5 | 20 | 10 | 347.5 | 8.8 | 1.0 |
Embodiment 3
Coagulant is selected ferric sulfate for use, and all the other are with embodiment 1.The solidification effect that adds ferric sulfate sees Table 3.
Table 3 adds the solidification effect of ferric sulfate
| Ferric sulfate g | Cement g | Flyash g | COD?mg/L | pH | Intensity Mpa |
| 0.5 | 20 | 10 | 601.3 | 13.4 | 0.8 |
| 1.0 | 20 | 10 | 646.6 | 13.3 | 0.9 |
| 1.5 | 20 | 10 | 633.7 | 12.3 | 0.7 |
| 2.0 | 20 | 10 | 548.1 | 12.8 | 0.8 |
| 2.5 | 20 | 10 | 528.7 | 10.5 | 1.0 |
| 3.0 | 20 | 10 | 479.8 | 9.5 | 1.1 |
| 3.5 | 20 | 10 | 385.2 | 8.9 | 0.9 |
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction, to any simple modification, equivalent variations that above embodiment did, all falls within protection scope of the present invention on every foundation technical spirit of the present invention.
Claims (5)
1. drilling well discarded slurry solidification processing method is characterized in that, may further comprise the steps:
Get drilling well discarded slurry 100ml in plastic cup,, add the 0.5-3.5g coagulant again, measure CODcr, pH value and the intensity of cured body leach liquor evenly adding cement 20g and flyash 10g under the stirring action.
2. drilling well discarded slurry solidification processing method according to claim 1 is characterized in that described coagulant is a ferric sulfate.
3. drilling well discarded slurry solidification processing method according to claim 1 is characterized in that described coagulant is a zinc sulfate.
4. drilling well discarded slurry solidification processing method according to claim 1 is characterized in that described coagulant is a sal epsom.
5. according to any described drilling well discarded slurry solidification processing method of claim 1-4, it is characterized in that described coagulant consumption is 3.0g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102166000A CN102086085A (en) | 2009-12-07 | 2009-12-07 | Method for solidifying drilling waste slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102166000A CN102086085A (en) | 2009-12-07 | 2009-12-07 | Method for solidifying drilling waste slurry |
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| CN102086085A true CN102086085A (en) | 2011-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009102166000A Pending CN102086085A (en) | 2009-12-07 | 2009-12-07 | Method for solidifying drilling waste slurry |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103351091A (en) * | 2013-07-18 | 2013-10-16 | 中国石油化工股份有限公司 | Process for treating waste well slurry with fly ash |
| CN106915877A (en) * | 2017-03-06 | 2017-07-04 | 邹立夫 | One kind pollution greasy filth inorganic agent and its application method |
| CN109626768A (en) * | 2018-12-25 | 2019-04-16 | 肇庆市珈旺环境技术研究院 | Oil-gas field drilling mud chip curing agent and application thereof |
| CN115557738A (en) * | 2022-10-24 | 2023-01-03 | 宁夏新大地环保科技工程有限公司 | Roadbed filling material and manufacturing method thereof |
-
2009
- 2009-12-07 CN CN2009102166000A patent/CN102086085A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103351091A (en) * | 2013-07-18 | 2013-10-16 | 中国石油化工股份有限公司 | Process for treating waste well slurry with fly ash |
| CN106915877A (en) * | 2017-03-06 | 2017-07-04 | 邹立夫 | One kind pollution greasy filth inorganic agent and its application method |
| CN109626768A (en) * | 2018-12-25 | 2019-04-16 | 肇庆市珈旺环境技术研究院 | Oil-gas field drilling mud chip curing agent and application thereof |
| CN115557738A (en) * | 2022-10-24 | 2023-01-03 | 宁夏新大地环保科技工程有限公司 | Roadbed filling material and manufacturing method thereof |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110608 |