Diesel-oil-based drilling cutting processing method based on solvent extracting

A treatment method and extraction technology, which is applied in the treatment of hydrocarbon oil, the petroleum industry, and the preparation of liquid hydrocarbon mixtures, etc., can solve the problems of waste of resources, pollution of diesel-based drill cuttings, etc., and achieve cost savings, clean and pollution-free costs, and increase production. Effect

Active Publication Date: 2016-09-28
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to: aim at the pollution of diesel-based drilling cuttings and the waste of resources, to provide a treatment process that can recover crude oil in diesel-based drilling cuttings, reduce the pollution of diesel-based drilling cuttings and the characteristics of the extractant used. formula

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] This embodiment provides a method for processing diesel-based drilling cuttings based on solvent extraction, which is carried out through the following steps:

[0023] (1) Pretreatment: Weigh a certain amount of diesel-based drilling cuttings, put them in an oven, set the temperature at 105°C, and dry to constant weight;

[0024] (2) Extraction: Weigh a certain amount of dried diesel-based drill cuttings and put them into a beaker, and add 30 parts of n-hexane into the beaker in sequence according to the ratio of agent to mud (volume unit ml: mass unit g) 3:1 , 25 parts of acetone, 25 parts of methyl ethyl ketone, 10 parts of ethyl acetate, and 10 parts of ethanol were stirred for 20 minutes, the speed of the stirrer was 500 r / min, the temperature of the water bath was set to 45 ° C, and the stirring time was 20 minutes;

[0025] (3) Washing: Pour out the extract after the extraction in step 2, and wash twice with water treated by electric floatation-coagulation, each w...

Embodiment 2

[0030] In this embodiment, a method for processing diesel-based drilling cuttings based on solvent extraction is carried out through the following steps:

[0031] (1) Pretreatment: Weigh a certain amount of diesel-based drilling cuttings, put them in an oven, set the temperature at 105°C, and dry to constant weight;

[0032] (2) Extraction: Weigh a certain amount of dried diesel-based drilling cuttings into a beaker, and add 25 parts of n-hexane and 30 parts of acetone in sequence according to the ratio of agent to mud (volume: mass) of 3:1. , 25 parts of methyl ethyl ketone, 10 parts of ethyl acetate, and 10 parts of ethanol were stirred for 20 minutes, the speed of the stirrer was 500 r / min, the temperature of the water bath was set at 45 ° C, and the stirring time was 20 minutes;

[0033] (3) Washing: Pour out the extract after the extraction in step 2, and wash twice with water treated by electric floatation-coagulation, each washing time is 10 minutes;

[0034] (4) Three...

Embodiment 3

[0038] In this embodiment, a method for processing diesel-based drilling cuttings based on solvent extraction is carried out through the following steps:

[0039] (1) Pretreatment: Weigh a certain amount of diesel-based drilling cuttings, put them in an oven, set the temperature at 105°C, and dry to constant weight;

[0040] (2) Extraction: Weigh a certain amount of dried diesel-based drill cuttings into a beaker, and add 35 parts of n-hexane and 25 parts of acetone in sequence according to the ratio of agent to mud (volume: mass) of 3:1. , 20 parts of methyl ethyl ketone, 10 parts of ethyl acetate, and 10 parts of ethanol were stirred for 20 minutes, the speed of the stirrer was 500 r / min, the temperature of the water bath was set at 45 ° C, and the stirring time was 20 minutes;

[0041] (3) Washing: Pour out the extract after the extraction in step 2, and wash twice with water treated by electric floatation-coagulation, each washing time is 10 minutes;

[0042] (4) Three-st...

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PUM

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Abstract

The invention discloses a diesel-oil-based drilling cutting processing method based on solvent extracting, and particularly relates to a method for processing shale-gas diesel-oil-based drilling-fluid drilling cuttings. A solvent for processing shale-gas diesel-oil-based drilling cuttings is prepared from, by weight, 20-40 parts of normal hexane, 20-40 parts of acetone, 20-40 parts of methyl ethyl ketone, 10 parts of ethyl acetate and 10 parts of ethyl alcohol. According to the solvent, the crude oil recycling rate for diesel-oil-based drilling cuttings can be about 99.7%, and the optimal extracting conditions are that the solvent-to-mud ratio (volume unit (ml) : mass unit (g)) is 3:1, extracting temperature is 45 DEG C, the stirring speed is 500 r / min, extracting time is 20 min, and the water-washing-three-grade cross-flow extracting technology is adopted. After extracting is completed, the recycling rate of an extracting agent can be about 98.5%, and the prepared extracting agent has the advantages that the effect is good, the crude oil recycling rate is high, the recycling rate of the extracting agent is high, the technology is simple, cleaning and pollution-free effects are achieved, and cost is saved.

Description

technical field [0001] The invention relates to a method for processing diesel-based drilling cuttings based on solvent extraction, especially for processing shale gas diesel-based drilling fluid cuttings, and belongs to the technical field of oil and gas field stimulation. Background technique [0002] The exploration and development of shale oil (gas) wells in my country is still in the initial stage, and oil-based mud technology is generally used when drilling shale oil (gas) wells. Oil-based mud has the characteristics of high temperature resistance, salt and calcium erosion resistance, good wall stability, good lubricity, and little damage to oil and gas layers, so it will be used on a large scale in the mining process. [0003] However, the use of diesel-based drilling fluid in the process of exploration and development of oil and gas resources will produce the accumulation of diesel-based drilling fluid cuttings (referred to as diesel-based cuttings). Diesel-based dr...

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 贾振福刘颂邱康洁刘武
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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