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Oil-based drilling mixture reinjection slurry composition, oil-based drilling mixture reinjection slurry and preparation method and application thereof

An oil-based drilling and oil-based drilling fluid technology, applied in wellbore/well components, earthwork drilling, wellbore flushing, etc., can solve the problem of unclear stability time of downhole slurry, inaccurate component dosage, poor suspension stability, etc. problem, to reduce the risk of bottom hole sedimentation and blasthole blockage, good suspension stability, and low price

Active Publication Date: 2021-11-16
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to overcome the defects of poor suspension stability, inaccurate dosage of each component and unclear and uncontrollable stability time of downhole slurry existing in the existing cuttings re-injection system

Method used

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  • Oil-based drilling mixture reinjection slurry composition, oil-based drilling mixture reinjection slurry and preparation method and application thereof
  • Oil-based drilling mixture reinjection slurry composition, oil-based drilling mixture reinjection slurry and preparation method and application thereof

Examples

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Embodiment 1

[0082] This example is used to illustrate that the oil-based drilling mixture re-injection composition according to the present invention is prepared according to the formula and process parameters in Table 1, and the oil-based drilling mixture re-injection is prepared according to the following method.

[0083] The preparation method of the oil-based drilling mixture back grouting comprises the following steps:

[0084] (1) At room temperature, stir the oil-based drilling mixture and water in a tall beaker at a speed of 1000 rpm for 10 minutes to obtain the first mixture;

[0085] (2) At room temperature, after stirring the first mixture with the viscosifier, fluid loss reducer, and defoamer at a speed of 1000 rpm for 15 minutes, the mixture was placed in a mill and ground for 10 minutes to obtain an oil-based drilling mixture Back grouting.

Embodiment 2-13

[0087] In the case of no special instructions, embodiment 2-embodiment 13 adopts the same flow process as embodiment 1, and the difference is:

[0088] The content of different oil-based drilling mixtures and the required suspension stability time are different, and the type and amount of each component in the composition used are different. See Table 1 for details.

[0089] Table 1

[0090]

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Abstract

The invention relates to the technical field of oil and gas field drilling rock debris reinjection, and discloses an oil-based drilling mixture reinjection slurry composition, an oil-based drilling mixture reinjection slurry and a preparation method and application thereof. The oil-based drilling mixture reinjection slurry composition is prepared from more than two of the following components which are stored in a mixed mode or stored independently: an oil-based drilling mixture, a tackifier, a fluid loss agent, a defoaming agent and water, and the oil-based drilling mixture is oil-based drilling fluid and rock debris. By adopting the oil-based drilling mixture reinjection slurry, the suspension stabilization time can be controlled, the additive amount is small, and the requirements of low cost and environmental protection are met. Meanwhile, the API filter loss of the oil-based drilling mixture reinjection slurry is less than 10mL, so that the oil-based drilling mixture reinjection slurry meets the field filter loss requirement of an oil field, and has a wide application prospect.

Description

technical field [0001] The invention relates to the technical field of oil and gas field drilling cuttings reinjection, in particular to an oil-based drilling mixture re-injection composition, an oil-based drilling mixture re-injection grout, and a preparation method and application thereof. Background technique [0002] In recent years, more and more oil-based and synthetic-based drilling fluids have been used for drilling in offshore oil and gas field development. Drilling with oil-based drilling fluid will produce a large amount of oil-based cuttings. Oil-based drilling cuttings contain organic compounds such as diesel oil (white oil), polycyclic aromatic hydrocarbons, and chemical additives. The composition is complex, the pollution factors are many, and the treatment is difficult. A little carelessness will cause damage to the ecological environment or organisms such as soil, water quality, and oceans. The environmental protection of oil-based drilling cuttings has bec...

Claims

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Application Information

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IPC IPC(8): E21B21/06E21B21/00
CPCE21B21/062E21B21/065E21B21/001
Inventor 冯永存孙孟莹邓金根李晓蓉马成云张帅
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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