A kind of double continuous phase microemulsion, its preparation method and the drilling fluid containing the microemulsion and its preparation method

A bicontinuous phase and microemulsion technology, which is applied in the preparation of carboxylic acid amides, chemical instruments and methods, and the preparation of organic compounds, can solve the problems of complicated procedures, increased environmental pollution, and increased costs, and achieves good inhibition and easy Oil-removing, easy-to-clean effect
CN109971441BActive Publication Date: 2020-09-11SOUTHWEST PETROLEUM UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
SOUTHWEST PETROLEUM UNIV
Publication Date
2020-09-11

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Abstract

The invention provides a bicontinuous phase micro-emulsion which comprises an emulsifier, a water soluble acid, an oil phase and a water phase. The emulsifier is an amine nonionic emulsifier. The invention further discloses a drilling fluid containing the micro-emulsion. The drilling fluid comprises the micro-emulsion, an oil base stabilizer, organic soil and a weighing material. The invention further discloses a preparation method of the micro-emulsion and the drilling fluid. The method comprises the steps that other raw materials are mixed, the water soluble acid is added for induction to obtain the bicontinuous phase micro-emulsion and the drilling fluid, or the other raw materials and the water soluble acid are mixed at first to obtain the bicontinuous phase micro-emulsion, a drillingfluid additive is added, and the bicontinuous drilling fluid is obtained. The bicontinuous phase micro-emulsion has the advantages that the unique oil phase and water phase bicontinuous characteristics, high shearing force, low plastic viscosity and viscoelasticity rheologic characteristics are achieved, the advantages of the oil phase and water phase drilling fluids can be shown at the same timewhen the micro-emulsion is used for the drilling fluid, and the water power transmission, suspension, rock debris carrying and well cleaning capability of the drilling fluid are enhanced.
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Description

technical field

[0001] The invention belongs to the field of oilfield chemistry and colloid technology, in particular to a dual continuous phase microemulsion, a preparation method thereof, a drilling fluid containing the microemulsion and a preparation method thereof. Background technique

[0002] During the drilling process, the drilling fluid reaches the formation through the drill string, then is sprayed out by the drill bit into the annular space between the drill string and the well wall, and finally returns to the ground. During this process, the drilling fluid mainly provides the functions of suspending and carrying cuttings, balancing formation pressure and stabilizing the well wall, cooling and lubricating the drill bit and drilling tools, transmitting hydrodynamic force, etc., and minimizing the impact on oil and gas reservoirs and the ecological environment, etc. , Therefore, the drilling fluid is called the blood of drilling.

[0003] In the prior art, commonly...

Claims

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