High-softening point emulsified asphalt water-based drilling fluid additive and preparation method thereof

A technology for water-based drilling fluid and emulsified asphalt, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as poor filtration effect, achieve low filtration loss at high temperature and high pressure, high softening point of asphalt, good The effect of the filter loss function

Active Publication Date: 2013-03-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] One of the technical problems to be solved by the present invention is to provide an emulsified asphalt water-based drilling fluid treatment agent to solve the problem of poor filtration effect of the existing emulsified asphalt drilling fluid treatment agent at high temperature and high pressure

Method used

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  • High-softening point emulsified asphalt water-based drilling fluid additive and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030]The properties of No. 1 asphalt used in this embodiment are shown in Table 1. Add 2g sodium dodecylsulfate, 2g sodium dodecylbenzenesulfonate, 1.0g calcium chloride and 0.1g benzoic acid to 150g water, then the resulting mixture is heated to a temperature of 50°C and cut with a high-speed shear Cut for 1 minute, so that the emulsifier, stabilizer and additives can form a uniform solution with water, add 200g of No. 1 asphalt powder to the above solution under the shearing machine, and shear at a temperature of 50°C for 5 minutes. The asphalt water-based drilling fluid treatment agent is obtained. The product properties are shown in Table 3.

Embodiment 2

[0032] According to the method of Example 1, the difference is that the raw material used in this example is No. 2 pitch (see Table 1 for properties), and the emulsifier, stabilizer and auxiliary agent used are cetyltrimethylammonium chloride, chloride Ammonium and oxalic acid, emulsifier, stabilizer and additive dosage and test conditions are shown in Table 2, and product property analysis results are shown in Table 3.

Embodiment 3

[0034] According to the method of Example 1, the difference is that the raw material used in this example is No. 3 bitumen (see Table 1 for properties), and the emulsifier, stabilizer and auxiliary agent used are respectively 5-oleylamido-2-methoxybenzenesulfonate sodium chloride, cetyltrimethylammonium bromide, calcium chloride and petroleum sulfonate, emulsifier, stabilizer and additive dosage and test conditions are shown in Table 2, and the product property analysis results are shown in Table 3.

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Abstract

A high-softening point emulsified asphalt water-based drilling fluid additive and a preparation method thereof. The drilling fluid additive comprises 40-70 wt% of asphalt with a softening point of 150 DEG C-240 DEG C, 35-50 wt% of water, 0.02-2 wt% of an auxiliary agent, 0.05-5 wt% of an emulsifier, and 0.01-1 wt% of a stabilizer; the charge of the additive is anion; the storage stability for 1 day is not more than 1%; the storage stability for 5 day is not more than 5%; the high-temperature high-pressure filter loss at 220 DEG C and at 3.45 MPa is not more than 25 ml. The preparation method of the additive comprises the following steps: mixing water, the anion emulsifier, the stabilizer, and the auxiliary agent, then adding the asphalt fine powder with a softening point of 150 DEG C-240 DEG C into the above solution, and stirring. The drilling fluid additive provided by the invention has good high-temperature high-pressure filter loss effect, and is suitable for drilling of high-temperature high-pressure deep wells and extradeep wells.

Description

technical field [0001] The invention relates to an asphalt-based drilling fluid treatment agent and a preparation method thereof, in particular to an emulsified asphalt water-based drilling fluid treatment agent for high-temperature and high-pressure deep well drilling and a preparation method thereof. Background technique [0002] Drilling fluid refers to the general term of various circulating fluids that meet the needs of drilling work during oil and gas drilling. It is indispensable in the drilling process and is called the blood of drilling. Drilling fluid needs to carry and suspend cuttings, stabilize wellbore and control formation pressure, cool and lubricate drilling tools, transmit hydrodynamic force, obtain underground information, etc., so it is necessary to add drilling fluid treatment agents with various functions. Drilling fluid treatment agents can be divided into anti-slump agents, fluid loss reducers, plugging agents, shale inhibitors, viscosity reducers, lu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035
Inventor 王翠红王子军王红
Owner CHINA PETROLEUM & CHEM CORP
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