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Method for remediate waste oil-based drilling fluid sediments through combination of engineering bacteria and plants

An oil-based drilling fluid and joint remediation technology, applied in the restoration of polluted soil, etc., can solve the problems of low treatment efficiency and secondary pollution.

Inactive Publication Date: 2019-06-25
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for joint repair of waste oil-based drilling fluid deposits by engineering bacteria and plants, so as to solve the problems of low treatment efficiency and easy secondary pollution in the prior art

Method used

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  • Method for remediate waste oil-based drilling fluid sediments through combination of engineering bacteria and plants
  • Method for remediate waste oil-based drilling fluid sediments through combination of engineering bacteria and plants
  • Method for remediate waste oil-based drilling fluid sediments through combination of engineering bacteria and plants

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Mix clean soil with a humidity of 35%, a pH of 8, and a particle size of 0.005 mm to 1.5 mm with waste oil-based drilling fluid sediments at a ratio of 1:1 to prepare about 300 kg of experimental soil samples, and add SQ to the mixed soil samples -1 engineering bacteria 0.2mg.kg -1 , SQ-2 engineering bacteria 0.1mg.kg -1 , and then add 0.1mg.kg -1 NH 4 NO 3 Solid powder and 0.1mg.kg -1 KH 2 PO 4As a nitrogen source and a phosphorus source (both sprayed and stirred in the prepared soil in a water-soluble manner), the SQ-1 engineering bacteria are used to emulsify and degrade petroleum hydrocarbons and reduce the biological toxicity of petroleum hydrocarbons. Acinetobacter bacteria, Flavobacterium, Corynebacterium, Achromobacter, Bacillus, lipase, amylase, protease according to 1:1:0.5:1:1:0.3:0.5 : the mixture that the mass ratio of 1 forms; Described SQ-2 engineering bacterium is made of sphingobacterium (Sphingobacterium), alcanivorax (Alcanivorax), solution rin...

Embodiment 2

[0034] The difference from Example 1 is that the SQ-3 engineering bacteria of 0.1mL / kg has also been added, and the SQ-3 engineering bacteria are composed of Arthrobacter, Alcaligenes, Micrococcus ( Micrococcus), Nocardia, Mycobacterium; Aeromonas, Nocardia, Candida according to 1:4.3:0.1 :0.1:4:2:0.2:0.1 mass ratio composition.

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Abstract

The invention discloses a method for repairing waste oil-based drilling fluid sediments through engineering bacterium-plant combination. The method comprises the following steps: firstly, processing clean soil and the waste oil-based drilling fluid sediments into mixed soil; pre-planting the plants for 20 days; adding two types of engineering bacteria, NH4NO3, KH2PO4, and a surfactant into the mixed soil; then, planting plants for 30-300 days; within 7 to 10 days after planting, processing NH4NO3 solid powder and KH2PO4 into water solutions with the concentration of 0.05-1.2 mg / kg and 0.05-1.5mg / kg respectively, then uniformly spraying the aqueous solution into the soil, wherein 0.5-2.0 L of the aqueous solution is sprayed to 1 m<3> of the mixed soil. The problems that in the prior art, the treatment efficiency is low, and secondary pollution is likely to be caused can be solved.

Description

technical field [0001] The invention belongs to the field of waste drilling fluid treatment, and in particular relates to a method for jointly repairing waste oil-based drilling fluid deposits by engineering bacteria and plants. Background technique [0002] In the process of shale gas exploitation, since water-based drilling fluid cannot completely solve various problems encountered in the drilling process, while oil-based drilling fluid can effectively reduce cuttings shedding, prevent well collapse and other downhole accidents, so in drilling been widely applied. At present, the vast majority of shale gas wells in China use oil-based drilling fluids. With the rapid development of shale gas exploration and development, oil-based drilling fluids are also used in large quantities. During the process of using oil-based drilling fluids, a large number of waste oil-based drilling fluids are generated. The environmental pollution caused by liquid has also become a difficult pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/10
Inventor 苏俊霖秦祖海闫璇
Owner SOUTHWEST PETROLEUM UNIV
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