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Oil base drilling cutting cleaning fluid and cleaning method for oil base drilling cuttings

A technology for oil-based drilling cuttings and cleaning fluid, applied in the field of oil-based drilling cuttings cleaning fluid and oil-based drilling cuttings cleaning, can solve problems such as complex process and equipment corrosion, achieve simple operation, low cost, and reduce oil-water interfacial tension Effect

Inactive Publication Date: 2017-01-11
SINOPEC SSC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The Chinese patent with the publication number CN1650140A discloses a drilling cuttings treatment method and equipment. The cuttings are pretreated with a water-soluble demulsifier such as sodium alkylbenzene sulfonate, and the cuttings are mixed with inorganic acids such as sulfuric acid under high shear conditions. Mix with each other, add organic and inorganic acids in turn, and then mix with alkaline earth such as lime, use the heat provided by the acid-base reaction heat to achieve the purpose of evaporating oil and recovering oil. The oil content of drill cuttings after treatment is extremely low, but due to acid A large amount of alkali is used, there is a problem of equipment corrosion, and the process is complicated

Method used

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  • Oil base drilling cutting cleaning fluid and cleaning method for oil base drilling cuttings

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Experimental program
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Effect test

Embodiment 1

[0040]Put 1000g of oil-based drill cuttings in an oil field in a container with stirring facilities, add 16g of demulsifier 1231 produced by Shanghai Chengguan Biotechnology Co., Ltd. under constant stirring at a speed of 200rpm, and stir for 3 minutes; Sodium acyl-N-methyl taurate and 1000 g of water were continuously stirred for 5 minutes to obtain a mixture; the mixture was centrifuged at 2500 rpm for 5 minutes to obtain an upper oil phase, an intermediate water phase and a lower solid phase. The separated intermediate aqueous phase can be used for the next round of cleaning of oil-based cuttings.

Embodiment 2

[0042] Put 1000g of oil-based drilling cuttings in a certain oil field in a container with stirring facilities, add 20g of demulsifier 1631 produced by Shanghai Chengguan Biotechnology Co., Ltd. under constant stirring at a speed of 300rpm, and stir for 2 minutes; then add 8g of Sodium alkylbenzene sulfonate and 1500 g of water were continuously stirred for 10 minutes to obtain a mixture; the mixture was centrifuged at 3000 rpm for 5 minutes to obtain an upper oil phase, an intermediate water phase and a lower solid phase. The separated intermediate aqueous phase can be used for the next round of cleaning of oil-based cuttings.

Embodiment 3

[0044] Put 1000g of oil-based drill cuttings in an oil field in a container with stirring facilities, and add 18g of demulsifier 1831 produced by Shanghai Chengguan Biotechnology Co., Ltd. under constant stirring at a speed of 250rpm, and stir for 4 minutes; then add 7g of sorbitol Oleate and 1200g of water were stirred for 4 minutes to obtain a mixture; the mixture was centrifuged at 3000 rpm for 8 minutes to obtain an upper oil phase, an intermediate water phase and a lower solid phase. The separated intermediate aqueous phase can be used for the next round of cleaning of oil-based cuttings.

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Abstract

The invention provides an oil base drilling cutting cleaning fluid and a cleaning method for oil base drilling cuttings. The oil base drilling cutting cleaning fluid includes: a component A, a component B and a component C; the component A is a demulsifier; the component B is a surfactant; the component C is water; and the demulsifier, the surfactant and water are in a mass ratio of (1.6-2):(0.6-0.8):(100-150). Compared with the prior art, the demulsifier is added into the oil base drilling cutting cleaning fluid provided by the invention to destroy the stability of oil base drilling fluid emulsion carried in oil base drilling cuttings, so that a liquid phase can break away from the surfaces of solid phase particles, and the demulsifier can reach a synergistic effect with the surfactant, thus lowering the oil-water interfacial tension, and better playing the role of cleaning the oil component. In addition, the oil base drilling cutting cleaning fluid is composed of the demulsifier, the surfactant and water, the cost is low, and the operation is simple.

Description

technical field [0001] The invention belongs to the technical field of drilling solid waste treatment in the petroleum and natural gas industry, and in particular relates to an oil-based drilling cuttings cleaning liquid and a cleaning method for oil-based drilling cuttings. Background technique [0002] The use of oil-based drilling fluids in the process of shale gas exploration and development produces a large amount of oil-based drilling cuttings, which are hazardous solid wastes because they contain a large amount of mineral oil. If it is not handled properly, it will cause serious environmental hazards on the one hand and waste a lot of mineral oil resources on the other hand. At present, the cleaning treatment method has become one of the preferred methods for the industrial treatment of oil-based drilling cuttings due to its advantages of high oil recovery rate, simple process, and low cost. The core of its technology is to select a suitable cleaning agent. [0003] ...

Claims

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Application Information

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IPC IPC(8): C11D1/65C11D1/835C09K8/52
Inventor 何焕杰马金单海霞王中华位华马雅雅吕跃滨
Owner SINOPEC SSC
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