A kind of asphalt water-based drilling fluid treatment agent and preparation method thereof

A water-based drilling fluid and treatment agent technology, which is applied in chemical instruments and methods, chemical processing of tar pitch/petroleum pitch/natural asphalt, earthwork drilling, etc. Poor filtration loss, difficult to meet the high temperature working environment requirements of deep wells and ultra-deep wells, etc., to achieve good anti-slump, low high temperature and high pressure filtration loss, and high oil-soluble content.

Active Publication Date: 2016-07-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing sulfonated asphalt drilling fluid treatment agent has poor fluid loss reduction performance at high temperature, and it is difficult to meet the high-temperature working environment requirements of deep and ultra-deep wells. The existing sulfonated asphalt preparation method is not suitable for the preparation of asphalt water-based drilling fluid treatment for high-temperature environments agent

Method used

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  • A kind of asphalt water-based drilling fluid treatment agent and preparation method thereof
  • A kind of asphalt water-based drilling fluid treatment agent and preparation method thereof
  • A kind of asphalt water-based drilling fluid treatment agent and preparation method thereof

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preparation example Construction

[0021] The preparation method of the asphalt water-based drilling fluid treatment agent provided by the present invention, the recovery includes: distilling the neutralized qualified mixture, drying and pulverizing the obtained solidified product to obtain a high softening point asphalt water-based drilling fluid treatment agent, and distilling the obtained asphalt water-based drilling fluid treatment agent After the mixture of sulfonated dispersant and water is cooled, it is left to settle and stratified to obtain sulfonated dispersant and water respectively, and the sulfonated dispersant is used for recycling. During the distillation process, the distillation temperature is controlled not to exceed 150°C, preferably not to exceed 120°C.

[0022] In the method for using the drilling fluid treatment agent provided by the invention, the drilling fluid includes 1% to 3% by weight of the asphalt water-based drilling fluid treatment agent.

[0023] The drilling fluid treatment age...

Embodiment 1

[0029] The properties of No. 1 asphalt used in this embodiment are shown in Table 1.

[0030] Take by weighing No. 1 bitumen sample 100g and pour in the 1000ml three-necked flask, add 200g carbon tetrachloride reagent (chemically pure) wherein, the three-necked flask is placed in the electric heating mantle, the mixture of pitch sample and dispersant is heated to a temperature of 40 DEG C, and stirred at a temperature of 40 DEG C for 10 minutes; by an isobaric burette, 20 ml of 20% oleum (sulfur trioxide content is 21.5% by weight) was added dropwise in the there-necked flask at a rate of 1 ml / min, after adding Stir at 40°C for 3.5h, and then slowly drop an aqueous sodium hydroxide solution with a concentration of 5% by weight into a three-necked flask through an isobaric burette to conduct asphalt sulfonic acid, unreacted sulfur trioxide and sulfuric acid generated by the reaction. Neutralization reaction, stop dripping sodium hydroxide solution when the pH value of reaction ...

Embodiment 2

[0032]According to the method of Example 1, the properties of No. 2 bitumen used in this example are shown in Table 1, and the sulfonated dispersant used is a mixed solution of carbon tetrachloride: ethylene dichloride (volume ratio 2: 1), and the used sulfonated agent is 50% oleum (sulfur trioxide content ≥ 50%). The operating conditions are shown in Table 2, and the product property analysis results are shown in Table 3.

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Abstract

An asphalt water-based drilling fluid additive and a preparation method thereof. According to the additive, the content of oil soluble substances is not less than 25 wt%; the content of water soluble substances is not less than 30 wt%; the content of sodium sulfonate is not less than 10 wt%; the pH value is 8-10; the high-temperature high-pressure filter loss at 220 DEG C is not more than 25 ml; and the softening point of the asphalt is 150-240 DEG C. The preparation method comprises the following steps: dissolving asphalt in a dispersant of carbon tetrachloride or a mixture of carbon tetrachloride and dichloroethane, and performing sulfonation and neutralization. The additive has good high-temperature high-pressure filter loss effect, and is suitable for exploitation of deep well petroleum.

Description

technical field [0001] The invention relates to an asphalt-based drilling fluid treatment agent and a preparation method thereof, in particular to a sulfonated asphalt water-based drilling fluid treatment agent and a preparation method thereof. Background technique [0002] Drilling fluid is a general term for 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 must have the functions of carrying and suspending cuttings, stabilizing the well wall, controlling formation pressure, cooling and lubricating drill bits, transmitting hydrodynamic force, and obtaining underground information. agent. Drilling fluid treatment agents can be divided into anti-slump agents, fluid loss reducers, plugging agents, shale inhibitors, viscosity reducers, lubricants, high-temperature stabilizers, etc. according to their functions. Good anti-collapse, fluid l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035C10C3/02E21B33/10
Inventor 王翠红王子军
Owner CHINA PETROLEUM & CHEM CORP
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