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A deep-water white oil plate flow oil-based drilling fluid

A drilling fluid and flat plate technology, which is applied in the field of drilling, can solve the problems of large fluctuations and temperature sensitivity of drilling fluid, and achieve the effects of reduced high-pressure water loss, good anti-pollution performance, and excellent anti-pollution performance

Active Publication Date: 2020-02-07
YANGTZE UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing oil-based drilling fluids and synthetic-based drilling fluids generally have this problem. The viscosity of the drilling fluid is relatively sensitive to temperature, and fluctuates greatly with the change of temperature.

Method used

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  • A deep-water white oil plate flow oil-based drilling fluid
  • A deep-water white oil plate flow oil-based drilling fluid
  • A deep-water white oil plate flow oil-based drilling fluid

Examples

Experimental program
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preparation example Construction

[0032] Based on 100 parts of white oil, the deep-water white oil plate flow oil-based drilling fluid provided by the present invention contains 2-4 parts of flow pattern regulator, preferably 2.5-3.5 parts, more preferably 2.8-3.3 parts. In the present invention, the flow regulator is preferably prepared from raw materials including acrylic acid, phenylacetic acid and maleic anhydride, and the preparation method of the flow regulator preferably includes the following steps:

[0033] Mix acrylic acid and styrene for primary heat treatment to obtain a primary thermal mixture;

[0034] performing a secondary heat treatment on the primary thermal mixture and maleic anhydride to obtain a flow regulator.

[0035] The invention mixes acrylic acid and styrene for primary heat treatment to obtain a primary heat mixture. In the present invention, the temperature of the primary heat treatment is preferably 80-100°C, more preferably 85-95°C, most preferably 90-92°C; the time of the prima...

Embodiment 1

[0047] The main emulsifier is obtained by mixing oleic acid, dimer acid and tall oil fatty acid according to the mass ratio of 20:40:20.

[0048] Heat 20 parts of oleic acid and 25 parts of tall oil fatty acid to 120°C, vacuumize (vacuum degree -0.1MPa) inhale 30 parts of diethanolamine and 25 parts of triethanolamine, keep warm for 2 hours, and then continue to heat up to 360°C (heating time is 2h), heat preservation reaction for 6h, cooling and discharging to obtain co-emulsifier.

[0049] Mix and stir 30 parts of acrylic acid and 40 parts of styrene evenly, heat to 90°C, react for 1 hour, add 30 parts of maleic anhydride, heat to 160°C, keep warm for 3 hours, cool and discharge to obtain the flow regulator.

[0050] 100 parts of 3# white oil, 2 parts of main emulsifier, 1 part of auxiliary emulsifier, 2 parts of flow regulator, 1.0 part of calcium oxide, 1.5 parts of Pengrun organic soil, 3 parts of modified sulfonated Asphalt, 20 parts of 26% calcium chloride aqueous solu...

Embodiment 2

[0052] The main emulsifier is obtained by mixing oleic acid, dimer acid and tall oil fatty acid according to the mass ratio of 20:10:20.

[0053] Heat 15 parts of oleic acid and 20 parts of tall oil fatty acid to 120°C, vacuumize (vacuum degree -0.1MPa) inhale 35 parts of diethanolamine and 30 parts of triethanolamine, keep warm for 2 hours, and then continue to heat up to 360°C (heating time is 2h), heat preservation reaction for 6h, cooling and discharging to obtain co-emulsifier.

[0054] Mix and stir 30 parts of acrylic acid and 40 parts of styrene evenly, heat to 90°C, react for 1 hour, add 35 parts of maleic anhydride, heat to 160°C, keep warm for 3 hours, cool and discharge to obtain the flow regulator.

[0055] 100 parts of 3# white oil, 2 parts of main emulsifier, 1 part of auxiliary emulsifier, 2 parts of flow regulator, 1 part of magnesium oxide, 1.5 parts of Pengrun organic soil, 3 parts of natural asphalt, 20 parts of 26% calcium chloride aqueous solution and 99 ...

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Abstract

The invention provides deepwater white oil flat flow oil-based drilling fluid, under different temperatures, plastic viscosity and dynamic shear force are very stable, and cannot be changed with the change of the temperature. In addition, the high pressure water loss of the drilling fluid is obviously lower by comparing with the current drilling fluid, and the highest part is only 2.6 mL. The YP value of the drilling fluid ha a tendency for being reduced with the increase of the temperature, but the reduction degree is little, the temperature is increased from 4 DEG C to 70 DEG C, the YP valve is decreased from 11 to 9, and the requirement on the drilling fluid by a deepwater drilling well can be satisfied. The YP value, 3rmp and a final shearing value of the oil-based drilling fluid are not changed with the change of the temperature at the temperature of 4 DEG C, 25 DEG C and 65 DEG C; a drilling fluid system respectively passes through shale drilling debris contamination, seawater contamination and calcium sulfate contamination, the performance change is little, the performance almost is not changed with the temperature change, so that the drilling fluid is proved to have good anti-pollution performance.

Description

technical field [0001] The invention relates to the technical field of drilling, in particular to a deep-water white oil plate flow oil-based drilling fluid. Background technique [0002] Drilling fluid refers to the general term of various circulating fluids that meet the needs of drilling work with its multiple functions in the process of oil and gas drilling. It mainly has the functions of carrying and suspending cuttings, stabilizing the well wall, balancing formation pressure, cooling and lubricating drilling tools, It is an important part of drilling engineering technology to transmit hydrodynamic force and protect oil and gas layers. [0003] With the continuous development of marine exploration and development, marine drilling has gradually developed from shallow water to deep water and ultra-deep water. Deepwater drilling generally refers to drilling waters with a water depth of more than 500m, and ultra-deepwater drilling when the water depth is greater than 1500m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/03C09K8/32
CPCC09K8/03C09K8/32
Inventor 许明标由福昌周姗姗
Owner YANGTZE UNIVERSITY