Oil-based drilling cutting treatment method

A technology for oil-based drill cuttings and a treatment method, which is applied in the fields of petrochemical and petrochemical emissions treatment, can solve the problems of wasting oil resources, poor treatment effect, and environmental hidden dangers, and achieves reduction of operation and management costs and viscosity reduction effect. Good, improve the effect of recycling efficiency

Inactive Publication Date: 2015-07-29
SOUTHWEST PETROLEUM UNIV
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AI Technical Summary

Problems solved by technology

On-site treatment of oily drilling cuttings usually adopts the method of centralized landfill, but this method is likely to cause environmental hazards due to the accumulation of oil and heavy metal substances, and the oil content of oil-based drilling cuttings is usually between 15% and 30%. The landfill method will waste a lot of oil resources, so recycling oil is the best treatment technology
[0003] The current treatment methods for oily drilling cuttings have the characteristics of high energy consumption, poor treatment effect, difficult operation, and complicated process. The energy consumption of the solution is high and it is easy to cause air pollution, the energy consumption of the conventional solvent extraction method is too high, and the supercritical fluid extraction method requires high equipment (pressure above 40bar)

Method used

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  • Oil-based drilling cutting treatment method

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Effect test

Embodiment 1

[0021] Example 1 Analysis of components of oil-based drilling cuttings

[0022] Referring to GB8929-2006 Distillation method for determination of water content in crude oil, use a distillation device with a moisture receiver to separate and measure the water content in oil-based cuttings; the content of mineral oil in oil-based cuttings is determined by soil petroleum infrared photometry (Draft for comments) Determination; the solid slag content in oil-based cuttings adopts the difference method, that is, the difference between the quality of cuttings and the quality of water and mineral oil. The composition content of oil-based drill cuttings in an oilfield is shown in Table 1.

Embodiment 2

[0023] Example 2 Oil-based drill cuttings mineral oil extraction process

[0024] Take quantitative oil-based cuttings and add equal mass of on / off solvent CyNMe 2 , stirred at room temperature for 30 minutes, and centrifuged to separate the residue and liquid phase. After the residue was air-dried, the oil content of the solid residue was measured by infrared photometry. The measured oil content is shown in Table 2.

Embodiment 3

[0025] Embodiment 3 Separation and recovery of mineral oil process

[0026] Take a quantitative extract, add a quantitative amount of water according to the extract: water = 1:2 (vol%), and introduce CO under high-speed stirring. 2 , after aeration at 1L / min flux for 1h, the hydrophilicity of the on / off solvent is turned on, the solvent is transferred from the oil phase to the water phase, and the mineral oil is separated and recovered.

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Abstract

The invention discloses an oil-based drilling cutting treatment method. The oil-based drilling cutting treatment method comprises oil-based drilling cutting extraction, separation of an extract liquor, recycling of a switchable solvent, repeated separation and extraction, oil-based drilling cutting component analysis and the like. The method can be performed under a mild condition without high temperature, high pressure and other additional conditions, and changes of hydrophilic performance of the solvent can be intelligently controlled under the stimulus-response of CO2; the viscosity reduction effect on oil-based drilling cuttings is good, the separation capacity for mineral oil in the oil-based drilling cuttings is good, the recovery rate of oil can be up to 95% or higher, the ignition point of the switchable solvent CyNMe2 is high, the method does not have a biological accumulation effect, the recovery rate of the solvent can be up to 85% or higher, and the recovery efficiency can be further improved with methods such as infrared heating, addition of chemical agents and the like.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, in particular to the technical field of petrochemical effluent treatment, in particular to a technical method for oil-based drilling cuttings treatment. Background technique [0002] As the end product of drilling operations, oil-based drilling cuttings is a typical hazardous waste, which is mainly reflected in its high oil content and high heavy metal content. In addition, it also has the characteristics of complex components, high viscosity, and poor biodegradability. . On-site treatment of oily drilling cuttings usually adopts the method of centralized landfill, but this method is likely to cause environmental hazards due to the accumulation of oil and heavy metal substances, and the oil content of oil-based drilling cuttings is usually between 15% and 30%. The landfill method will waste a large amount of oil resources, so resource recovery of oil is the best treatment technolo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G1/04
CPCC10G1/04C10G2300/1003
Inventor 张太亮欧阳铖鲁红升全红平范开鑫姜在祥
Owner SOUTHWEST PETROLEUM UNIV
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