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A kind of oil-based drilling cuttings breaking stabilizer and preparation method thereof

An oil-based drilling cuttings and destabilization technology, which is used in chemical dehydration/demulsification, treatment of hydrocarbon oil, petroleum industry, etc. Simple, good effect, good effect of breaking stability

Active Publication Date: 2020-10-16
中石化石油工程技术服务有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Patent EP1165199 discloses a method for removing oil from cuttings in oil-based drilling fluids. Firstly, chemical agents are added to stabilize the cuttings. The emulsion is separated from the drilling mud by centrifugation, and finally the emulsion is destabilized by changing the temperature and other conditions to recover the oil phase. This method has a complicated destabilization process and introduces a large amount of surface activity. The agent reduces the recovered oil
"Journal of Environmental Engineering" published in February 2011 Xie Shuixiang et al.'s technology of "using chemically enhanced separation-harmless technology to treat waste oil-based drilling fluid". 30% composite demulsifier FPR-1, 1.5% coagulant CC, and 0.1% flocculant were added to waste oil-based drilling fluid, but the main components of each agent were not disclosed. Defects affecting the quality of recovered oil
[0004] To sum up, at present, the chemical destabilization of oil-based drilling cuttings mostly uses the compound treatment of surfactant and organic solvent. This method can realize the destabilization of oil-based drilling fluid and drilling cuttings, but there are complex processes and environmental impacts. It has the defects of secondary pollution, high treatment cost and poor stability treatment effect

Method used

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  • A kind of oil-based drilling cuttings breaking stabilizer and preparation method thereof
  • A kind of oil-based drilling cuttings breaking stabilizer and preparation method thereof

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preparation example Construction

[0026] The preparation raw materials of the oil-based drilling cuttings breaking agent provided by the invention include basic compounds. In the present invention, the basic compound is preferably a sodium-containing basic compound, more preferably sodium carbonate and / or sodium hydroxide.

[0027] The preparation raw materials of the oil-based drilling cuttings breaking agent provided by the present invention include organic matter, and the organic matter includes amide compounds and / or polybasic organic acids. In the present invention, the amide compound is preferably carbonamide. In the present invention, the polybasic organic acid is preferably 2-hydroxypropane-1,2,3-tricarboxylic acid and / or oxalic acid.

[0028] The raw materials for the preparation of the oil-based drilling cuttings breaking agent provided by the invention include water. The present invention has no special restrictions on the water, and industrial water commonly used by those skilled in the art can b...

Embodiment 1

[0049] Under the condition that the stirring speed is 100rpm, add sodium carbonate, carbonamide and water in sequence, the weight ratio of sodium carbonate, carbonamide and water is 13:14:73, keep stirring for 5min, and cool to room temperature to obtain oil-based drill cuttings Stabilizer.

[0050] At a stirring speed of 100rpm, add 100 parts by weight of oil-based cuttings to 100 parts by weight of the oil-based cuttings breaking agent obtained above, and stir for 5 minutes to obtain a solid-liquid mixture; Under these conditions, centrifuge for 3 minutes and let stand to obtain a base oil phase, an aqueous phase and a solid phase.

[0051] According to the method described in the above technical scheme, the oil content, state, particle size and base oil recovery rate in the solid phase after the separation are tested, and the test results are shown in Table 1, which is the oil base prepared by the embodiment of the present invention. Breaking effect data of cuttings breaki...

Embodiment 2

[0055] Under the condition that the stirring rate is 200rpm, sodium carbonate, oxalic acid and water are sequentially added, the weight ratio of the sodium carbonate, oxalic acid and water is 20:20:60, the stirring is kept for 15min, cooled to room temperature, and the oily base Drill cutting stabilizer.

[0056] At a stirring speed of 200rpm, add 100 parts by weight of oil-based cuttings to 200 parts by weight of the oil-based cuttings breaking agent prepared above, and stir for 15 minutes to obtain a solid-liquid mixture; Under the condition of 3000rpm, centrifuge for 4min and let stand to obtain base oil phase, water phase and solid phase.

[0057] According to the method described in the above-mentioned technical scheme, test the oil content, state, particle size and base oil recovery rate in the solid phase after separation, and the test results are shown in Table 1.

[0058] The above separated water phase can be directly used as an oil-based drill cuttings breaking age...

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Abstract

The invention provides an oil base drilling cutting destabilizing agent. The oil base drilling cutting destabilizing agent is prepared and obtained through materials including an alkali compound, organic matter and water. The organic matter includes an amide compound and / or polyatomic organic acid. The mass ratio of the alkali compound to the organic matter to the water is (13-20):(14-20):(60-73). According to the oil base drilling cutting destabilizing agent, through the synergistic effect of charge neutrality and flocculation, viscosity stability of an oil base drilling cutting system is destroyed, separation of a basic oil phase, a water phase and a solid phase in oil base drilling cuttings can be achieved through only one step, and the treated solid phase is in a loose flocculent shape. According to the oil base drilling cutting destabilizing agent, separation of the oil phase, the water phase and the solid phase is facilitated, the destabilizing effect on the solid phase is good, and high-quality basic oil in the oil base drilling cuttings can be recycled and obtained. The invention further provides a preparation method of the oil base drilling cutting destabilizing agent.

Description

technical field [0001] The invention relates to the technical field of drilling solid waste treatment, in particular to an oil-based drilling cuttings breaking agent and a preparation method thereof. Background technique [0002] With the acceleration of the development of unconventional oil and gas resources in my country, oil-based drilling fluids are widely used because of their excellent performance. A large amount of oil-based drilling fluid cuttings (referred to as oil-based cuttings) produced during the development process is listed as national hazardous waste because it contains petroleum, heavy metals and other pollutants, and must be treated. At present, the technologies used for recycling and harmless treatment of oil-based drilling cuttings mainly include thermal analysis, cleaning, biodegradation and solidification. However, due to the high bulk density, high viscosity and stable system of oil-based drilling cuttings, it has caused great difficulties in the rec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A62D3/36C10G33/04A62D101/20A62D101/43
CPCA62D3/36A62D2101/20A62D2101/43C10G33/04C10G2300/1033
Inventor 吕宁超单海霞何焕杰张晓刚詹适新
Owner 中石化石油工程技术服务有限公司
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