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Synthetic base drilling fluid base oil

A technology of base oil and drilling fluid, applied in the field of base oil of drilling fluid, can solve the problems of reduced stability of inverse emulsification drilling fluid, and achieve the effects of low aromatic content, high safety and good biodegradability

Inactive Publication Date: 2016-04-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, it may cause the stability of the entire inverse emulsion drilling fluid to decrease

Method used

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  • Synthetic base drilling fluid base oil
  • Synthetic base drilling fluid base oil

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0022] Add 50g of fine chemical base oil A to 50g of Fischer-Tropsch synthetic oil B, stir a little to get oil product 1, to be determined.

[0023] Table 1 Oil Product 1 Performance

[0024] performance parameter Density (20℃) / (g / cm 3 ) 0.80 Kinematic viscosity (40℃) / (mm 2 / s) 2.01 Closed flash point / ℃ 66 Pour point / ℃ -21 Aromatic hydrocarbon content / % 0.1

[0025] Table 2 Oil family composition

[0026]

example 2

[0028] Add 50.4g of fine chemical base oil A to 50g of Fischer-Tropsch synthetic oil B, stir a little to get oil product 2, to be determined.

[0029] Table 3 Oil 2 performance

[0030] performance parameter Density (20℃) / (g / cm 3 ) 0.81 Kinematic viscosity (40℃) / (mm 2 / s) 2.04 Closed flash point / ℃ 67 Pour point / ℃ -21 Aromatic hydrocarbon content / % 0.2

[0031] Table 4 Oil Group 2 Composition

[0032]

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Abstract

The invention relates to a base oil used during drilling operation, wherein the base oil is a synthetic base drilling fluid base oil with characteristics of environmental protection, low toxicity, high safety and low-temperature fluidity. According to the present invention, the synthetic base drilling fluid base oil is formed by mixing Fischer-Tropsch synthetic oil and non-conventional petroleum-derived fine chemical base oil, and contains at least 35% by mass of a variety of C9-C20 n-alkanes, at least 60% by mass of a variety of C9-C20 branched or cyclic alkanes, and less than 0.5% by mass of aromatic hydrocarbon, the kinematic viscosity of the synthetic base drilling fluid base oil at the temperature of 40 DEG C is 2-3 mm<2> / s, the pour point is -10 to -30 DEG C, and the flash point is 50-80 DEG C.

Description

Technical field [0001] The invention involves the basic oil of the drilling fluid. Specifically, it is a basic oil of full oil or inverse emulsification synthetic base drilling solution. Background technique [0002] The oil -based drilling solution has been used in drilling oil and gas resources for decades. It is especially true for high -water -sensitive underground rock formations. It can avoid the problem of water migration to drilling rock layers that are prone to water -based drilling fluid system.Unstable and damage to the eye collapse and damage.In the past, the basic oils used in oil -based drilling fluids such as crude oil, diesel toxic and low biodegradability.In terms of environmental protection and safety, it is obviously not satisfactory.Especially when drilling at sea, the drilling crumbs wrapped in oil -based drilling fluids will inevitably have an adverse effect when they are discharged into the sea.Therefore, the oil derived from oil is not the basic oil in the...

Claims

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Application Information

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IPC IPC(8): C09K8/34
Inventor 杨智中黄冬逯贵广
Owner CHINA PETROLEUM & CHEM CORP
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