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

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...

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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

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