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Oil-based drilling fluid and its preparation method

A drilling fluid and all-oil-based technology, which is applied in the field of oil and gas field chemistry, can solve the problems of oil-based drilling fluids polluting the environment, hidden safety hazards, and high cost, and achieves benefits for reservoir protection, good cutting resistance, and high temperature stability good sex effect

Inactive Publication Date: 2014-07-09
CNPC SICHUAN GASOLINEEUM GEOPHYSICAL PROSPECTING ENG TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the problems of environmental pollution, high cost and potential safety hazards of oil-based drilling fluid prepared with diesel oil or crude oil as base oil, and to seek a new way to effectively utilize waste cooking oil, the present invention provides a drilling fluid with waste cooking oil as base oil. Full oil base drilling fluid and preparation method thereof

Method used

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  • Oil-based drilling fluid and its preparation method
  • Oil-based drilling fluid and its preparation method
  • Oil-based drilling fluid and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0039]Add waste cooking oil (the weight percentage content of vegetable oil in waste cooking oil is 60%, and the weight percentage content of animal oil is 40%) in airtight reaction kettle, the addition amount of waste cooking oil accounts for about 1 / 3 of airtight reaction kettle volume, Start stirring and heating. When the temperature of the reactor reaches 50°C, stir and add sodium sulfite slowly and evenly. The amount of sodium sulfite added is 1.5% (percentage by weight) of the waste edible oil. After keeping the temperature for 40 minutes, cool to room temperature to obtain oil Mutually. Stir the oil phase cooled to room temperature, the stirring rate is maintained at 1000r / min, add sodium dodecylsulfonate in the oil phase, the addition of sodium dodecylsulfonate is 2% (percentage by weight) of the waste edible oil ); then add calcium dodecylbenzenesulfonate, the addition of calcium dodecylbenzenesulfonate is 2% (percentage by weight) of the waste edible oil; add quatern...

Embodiment 2

[0041] Add waste cooking oil (the weight percent content of vegetable oil in the waste cooking oil is 67%, and the weight percentage content of animal oil is 33%) in the airtight reaction kettle, the addition amount of waste cooking oil accounts for about 1 / 3 of the airtight reaction kettle volume, Start stirring and heating. When the temperature of the reactor reaches 60°C, stir and add sodium bisulfite slowly and uniformly. The amount of sodium bisulfite added is 2% (percentage by weight) of the waste edible oil. After the heat preservation reaction for 40 minutes, Cool to room temperature to obtain an oily phase. Stir the oil phase cooled to room temperature, the stirring rate is maintained at 1000r / min, add sodium dodecylbenzenesulfonate to the oil phase, the addition of sodium dodecylbenzenesulfonate is 3% of the waste edible oil ( % by weight); then add sodium lauryl polyoxyethylene ether sulfate, the addition of sodium lauryl polyoxyethylene ether sulfate is 2% (percent...

Embodiment 3

[0043] Add waste cooking oil (the weight percentage content of vegetable oil in waste cooking oil is 70%, and the weight percentage content of animal oil is 30%) in airtight reaction kettle, the addition amount of waste cooking oil accounts for about 1 / 3 of airtight reaction kettle volume, Start stirring and heating. When the temperature of the reaction kettle reaches 60°C, stir and slowly and evenly add potassium sulfite. The amount of potassium sulfite added is 1.5% (percentage by weight) of the waste edible oil. After keeping the temperature for 50 minutes, cool to At room temperature, an oily phase was obtained. Stir the oil phase cooled to room temperature, the stirring rate is maintained at 800r / min, add sodium dodecyl naphthalene sulfonate in the oil phase, the addition of sodium dodecyl naphthalene sulfonate is 2.5% of the waste edible oil ( % by weight); then add sodium lauryl polyoxyethylene ether sulfate, the addition of sodium lauryl polyoxyethylene ether sulfate i...

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Abstract

The invention discloses an oil-based drilling fluid and its preparation method. The waste edible oil oil-based drilling fluid comprises the ingredients of waste edible oil, sulfite, a main emulsifier, an auxiliary emulsifier, organoclay, a filtrate reducer, a wetting agent and a barite; the preparation method of the waste edible oil oil-based drilling fluid comprises the following steps: preparing an oil phase by waste edible oil and sulfite, and then adding the main emulsifier, the auxiliary emulsifier, the organoclay, the filtrate reducer, the wetting agent and barite. The prepared trench oil oil-based drilling fluid takes waste edible oil as a base oil to substitute diesel oil or crude oil, the cost is low, the environment is friendly, the well wall stability is good, the inhibition performance is strong, lubrication performance and rheological performance are excellent, anti-sloughing inhibition performance and high temperature stability are good, construction requirement for the drilling well can be better satisfied, and the oil-based drilling fluid and its preparation method can provide a new approach for using the waste edible oil in the reasonable mode.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field chemistry, and in particular relates to an all-oil-based drilling fluid with waste edible oil as base oil and a preparation method thereof. Background technique [0002] Drilling fluid, also known as drilling flushing fluid, is a circulating flushing medium used in the drilling process. Drilling fluid mainly completes the tasks of suspension, pressure control, formation stability, buoyancy, lubrication and cooling during the drilling process. Drilling fluid has the functions of cleaning the bottom of the well and carrying cuttings; cooling and lubricating the drill bit and drill string; balancing the side pressure of the well wall rock, sealing and stabilizing the well wall; balancing the formation pressure; reducing the sedimentation velocity of cuttings; cuttings; effectively transmit hydraulic power; bear part of the gravity of the drill pipe and casing; provide a large amount of dat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/34
CPCC09K8/34
Inventor 蔺文洁黎金明刘伟王京光赵海峰俞浩杰张长庚郭康赵向阳郝超苏欢董宏伟张宇吴超刘婷婷曲波赵文庄
Owner CNPC SICHUAN GASOLINEEUM GEOPHYSICAL PROSPECTING ENG TECH RES INST
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