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Solubilization assistant composition for recovering oil component in oil-based drilling chips and application thereof

A technology for oil-based cuttings and compositions, which is applied in the field of solubilizing compositions for recovering oil components in oil-based cuttings, which can solve the problems of low solubility and substandard oil-based cuttings, achieve uniform texture and realize resource utilization , the use of good results

Active Publication Date: 2019-03-22
SINOPEC SSC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using a single component supercritical CO 2 Fluid used as a solvent to treat oil-based cuttings still has great limitations, mainly because oil-based cuttings contain not only 10%-20% (mass ratio) of base oil, but also weak polarity such as emulsifiers and lipophilic colloids. or polar oil-soluble substances, these substances in a single supercritical CO 2 The low solubility in the fluid will directly cause the oil-based cuttings to fail to meet the standard after treatment

Method used

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preparation example Construction

[0035] The composition of the invention has good mutual solubility effect, can form a colorless transparent liquid at room temperature and simple mechanical stirring, has uniform texture and stable shape. Correspondingly, an embodiment of the present invention provides a method for preparing a co-solvent for recovering oil-based drill cuttings oil component mixture, comprising the following steps:

[0036] 1) Take alcohol, acetone, ethyl acetate and halogenated alkanes according to parts by volume;

[0037] 2) Mix the above-mentioned raw materials and stir evenly.

[0038] In addition, the present invention also provides the solubilizing composition as described above, in supercritical CO 2 Application in extraction treatment of oily drill cuttings.

[0039] The specific application method in the embodiment of the present invention includes: providing CO in a supercritical state 2 , and add the above-mentioned solubilizing composition, and carry out contact extraction with ...

Embodiment 1

[0044] A solubilizing composition for recovering oil-based drilling cuttings oil components, according to parts by volume (same volume percentage), comprising the following components:

[0045] Ethanol 63%; acetone 11%; ethyl acetate 8%; halogenated alkanes (dichloromethane) 18%.

[0046] The preparation method of above-mentioned composition comprises the following steps:

[0047] 1) Take alcohol, acetone, ethyl acetate and halogenated alkanes according to parts by volume;

[0048] 2) Mix the above-mentioned raw materials and stir evenly.

Embodiment 2

[0050] A solubilizing composition for recovering oil-based drilling cuttings oil components, comprising the following components in parts by volume:

[0051] 16% methanol; 18% acetone; 33% ethyl acetate; 33% halogenated alkanes (for carbon tetrachloride).

[0052] The preparation method of above-mentioned composition comprises the following steps:

[0053] 1) Take alcohol, acetone, ethyl acetate and halogenated alkanes according to parts by volume;

[0054] 2) Mix the above-mentioned raw materials and stir evenly.

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Abstract

The invention discloses a solubilization assistant composition for recovering oil component in oil-based drilling chips and application thereof. The solubilization assistant composition is prepared from the following ingredients in percentage by volume: 15 to 63 percent of alcohol, 11 to 18 percent of aliphatic linear chain ketone, 8 to 33 percent of ethyl acetate and 18 to 34 percent of halogenated hydrocarbon. The solubilization assistant composition for recovering oil component in oil-based drilling chips has the advantages that the mutual solubilization effect is good; the colorless transparent liquid can be formed through simple mechanical stirring at the normal temperature; the texture is uniform; the shape is stable. Compared with the single supercritical CO2 fluid treatment on oil-containing drilling chips, the method has the advantages that after the composition is added, the oil component mixture recovery rate is improved by 5 to 25 percent; the basic oil recovery rate is greater than 99 percent; the drilling chip oil content is lower than 0.3 percent, meeting the Contaminant Control Standard in Farm Sludge GB4284-84; the resource quantity reduction and harmless treatmentof the oil-based drilling chips is realized in one step; the addition quantity is small; the process is simple; the safety is high.

Description

technical field [0001] The invention relates to the technical field of petroleum and natural gas, in particular to a solubilizing composition for recovering oil components in oil-based drilling cuttings and its application. Background technique [0002] In the process of drilling with oil-based drilling fluid, a large amount of oily cuttings will be produced. These oil-based drilling fluid cuttings contain a large amount of base oil and additives such as emulsifiers, wetting agents, lipophilic colloids, weighting agents, and other harmful substances, which need to be treated harmlessly. The environment has caused great harm. [0003] The physical and chemical treatment methods of oil-based drilling cuttings commonly used at home and abroad mainly include: incineration method, burial method, downhole reinjection method, solidification method, solvent extraction method, heat treatment method, centrifugal separation method, etc. For solvent extraction, my country's supercriti...

Claims

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Application Information

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IPC IPC(8): C10G21/27
CPCC10G21/27C10G2300/1003
Inventor 位华何焕杰王中华马金张弌杨朝光
Owner SINOPEC SSC