Composite solidifying agent and gas field three-sulfonated system waste drilling mud solidifying optimization method

A technology of composite curing agent and waste mud, which is applied in chemical instruments and methods, fixed/solidified sludge treatment, sludge treatment, etc., can solve problems that cannot meet actual engineering needs, and achieve the effect of strengthening fixation and significant control Effect

Inactive Publication Date: 2018-05-29
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional curing method of only adding a single curing agent cannot meet the act

Method used

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  • Composite solidifying agent and gas field three-sulfonated system waste drilling mud solidifying optimization method
  • Composite solidifying agent and gas field three-sulfonated system waste drilling mud solidifying optimization method
  • Composite solidifying agent and gas field three-sulfonated system waste drilling mud solidifying optimization method

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Effect test

Embodiment 1

[0025] Embodiment 1: The research object of the present invention is the waste drilling mud from a certain gas field drilling in Tarim, which is mainly composed of cuttings, bentonite, weighting material calcium carbonate and ultrafine calcium carbonate, soda ash and caustic potash, potassium acrylate, tannin extract, etc. The particle size of the solid phase is generally between 0.01-0.03 μm, the appearance is viscous liquid or semi-fluid, an alkaline mixed liquid with extremely fine particles, high water content and not easy to dehydrate.

[0026] Firstly, 1.5% phenolic resin and 2% sulfonated asphalt were added to the drilling mud, and stirred with a stirrer until the solid-liquid components were fully mixed, so as to simulate the three-sulfur system drilling waste mud that appeared in the gas field.

[0027] And then carry out the pretreatment of destabilization of glue breaking. Add 6g / L ferric chloride (FeCl 3 ) powder, stir while adding, stir quickly for 3 minutes, and...

Embodiment 2

[0040] Embodiment 2: The research object of the present invention is the waste drilling mud from a certain gas field drilling in Tarim, which is mainly composed of cuttings, bentonite, weighting material calcium carbonate and ultrafine calcium carbonate, soda ash and caustic potash, potassium acrylate, tannin extract, etc. The particle size of the solid phase is generally between 0.01-0.03 μm, the appearance is viscous liquid or semi-fluid, an alkaline mixed liquid with extremely fine particles, high water content and not easy to dehydrate.

[0041] First, add 1% phenolic resin and 1% sulfonated asphalt into the drilling mud, and stir it with a stirrer until the solid-liquid components are fully mixed, so as to simulate the three-sulfur system drilling waste mud that appears in the gas field.

[0042] And then carry out the pretreatment of destabilization of glue breaking. Add 5g / L ferric chloride (FeCl 3 ) powder, stir while adding, stir rapidly for 4 minutes, and stir slowl...

Embodiment 3

[0045] Embodiment 3: The research object of the present invention is the waste drilling mud from a certain gas field drilling in Tarim, mainly composed of cuttings, bentonite, weighting material calcium carbonate and ultrafine calcium carbonate, soda ash and caustic potash, potassium acrylate, tannin extract, etc. The particle size of the solid phase is generally between 0.01-0.03 μm, the appearance is viscous liquid or semi-fluid, an alkaline mixed liquid with extremely fine particles, high water content and not easy to dehydrate.

[0046] First, add 2% phenolic resin and 3% sulfonated asphalt into the drilling mud, and stir it with a stirrer until the solid-liquid components are fully mixed, so as to simulate the three-sulfur system drilling waste mud that appears in the gas field.

[0047] And then carry out the pretreatment of destabilization of glue breaking. Add 8g / L ferric chloride (FeCl 3 ) powder, stir while adding, stir rapidly for 5 minutes, and stir slowly for 8 m...

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Abstract

The invention discloses a composite solidifying agent and a gas field three-sulfonated system waste drilling mud solidifying optimization method. The optimization method mainly comprises the steps: fully stirring the waste drilling mud containing a three-sulfonated system, and adding 5-8 g/L of ferric chloride powder to break gel and destabilize; then adding a composite solidifying agent composedof 10-15% of fly ash, 1-2% of quicklime and 8-12% of Portland cement by the mass percentage; and finally die-filling and drying, and completing mud solidification. The selected composite solidifying agent is cheap in composition and simple in process and can obviously solidify heavy metals in drilling mud of Tarim gas fields, and at the same time, the condition of standard exceeding of solidifiedbody leachate is greatly improved.

Description

technical field [0001] The invention relates to the technical field of drilling waste mud treatment in gas field exploitation, in particular to a composite curing agent and a gas field trisulfide system drilling waste mud solidification optimization method. Background technique [0002] Natural gas is an important energy substance that plays an important role in our production and life. In the process of natural gas extraction, a large amount of waste drilling mud mixed with drilling fluid, mud and cuttings will be produced. There are a lot of pollutants in waste drilling mud, such as chromium ions (Cr 6+ ), lead ions (Pb 2+ ), cadmium ions (Cd 2+ ) and other heavy metal ions; organic treatment agents and their decomposition products; petroleum substances; extremely high COD, suspended solids, etc. If the mud containing harmful substances is not treated in time, it will cause far-reaching environmental hazards if it enters the environment through rainfall infiltration an...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F101/20C02F103/36
CPCC02F11/008C02F2101/20C02F2103/365
Inventor 赵林丹妮向锋宋文杰杨永奎
Owner TIANJIN UNIV
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