Biosynthetic base oil, biosynthesis based environmentally-friendly drilling fluid for shale gas drilling, and preparation methods and application of biosynthetic base oil and biosynthesis based environmentally-friendly drilling fluid

A biosynthesis, base oil technology, applied in wellbore/well components, chemical instruments and methods, earth-moving drilling, etc., can solve the problem that the temperature resistance, inhibition and lubricity of high-performance water-based drilling fluid are difficult to meet on-site construction. requirements, drilling cuttings are difficult to handle, and the stability is not strong, so as to achieve good oxidation stability, improve ROP, and improve drilling efficiency.

Active Publication Date: 2017-05-10
ANTON OILFIELD SERVICES (GRP) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most of the drilling fluids in shale gas blocks use diesel-based drilling fluids and high-performance water-based drilling fluids. The temperature resistance, inhibition and lubricity of the liquid are difficult to meet the requirements of on-site construction, and complex accidents such as reaming, sticking and difficulty in running casing are prone to occur
[0004] Drilling fluids using biodiesel as base oil can well solve the problem of environmental damage. However, biodiesel currently used in drilling fluids is prone to oxidative degradation and slow hydrolysis, and its stability is not strong, which limits its use in the field of oil drilling.

Method used

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  • Biosynthetic base oil, biosynthesis based environmentally-friendly drilling fluid for shale gas drilling, and preparation methods and application of biosynthetic base oil and biosynthesis based environmentally-friendly drilling fluid
  • Biosynthetic base oil, biosynthesis based environmentally-friendly drilling fluid for shale gas drilling, and preparation methods and application of biosynthetic base oil and biosynthesis based environmentally-friendly drilling fluid
  • Biosynthetic base oil, biosynthesis based environmentally-friendly drilling fluid for shale gas drilling, and preparation methods and application of biosynthetic base oil and biosynthesis based environmentally-friendly drilling fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The preparation process of emulsifier A is as follows: lauryl alcohol first undergoes a substitution reaction with ethylene oxide, the reaction molar ratio is 1-3:1, and the reaction conditions are: react at 100°C-150°C for 2-5 hours. The reaction product is further polymerized into an ether, and after adding 10 to 15 ethers, the emulsifier A is obtained. The prepared emulsifier A showed better emulsifying ability, wetting ability and biodegradability. Lauryl alcohol in the above-mentioned preparation process also can be replaced by oleyl alcohol, cyclohexanol, stearyl alcohol. The preparation process of emulsifier B is as follows: the three raw materials of iron sulfonate, sodium alkylbenzene sulfonate and sodium alkyl succinate sulfonate are mixed at a high speed at 60°C in a weight ratio of 2:1:1. That is, emulsifier B is obtained, and the prepared emulsifier B is a good oil-soluble emulsifier and dispersant. Emulsifier C is zinc stearate, which has good thermal st...

Embodiment 2

[0057] A preparation method of biosynthetic base oil, comprising the steps of:

[0058] 1. The waste vegetable oil is used to obtain the semi-finished product of unsaturated fatty acid methyl ester by using the existing process: the waste vegetable oil and absolute ethanol are subjected to esterification reaction, and then neutralized with acid, and the product is distilled to obtain the semi-finished product of unsaturated fatty acid methyl ester ;

[0059] 2. Weigh 500 g of unsaturated fatty acid methyl ester and add it to the high-pressure reaction device.

[0060] 3. Add 9 g of concentrated sulfuric acid with a concentration of 65% as a catalyst in the high-pressure reaction device.

[0061] 4. Carry out self-lactonization reaction, the reaction temperature is 80° C., the reaction time is 4 hours, and the stirrer is continuously turned on during the process.

[0062] 5. After the reaction is over, continue to heat up to 100°C, and discharge the water vapor of the reactio...

Embodiment 3

[0069] Preparation and performance comparison of biosynthesis-based environmentally friendly drilling fluid system

[0070] The following percentages refer to volume percentages unless otherwise specified.

[0071] The main emulsifier used in the system preparation is the 4# main emulsifier obtained in Example 1, and the base oil used is the new biosynthetic oil obtained in Example 2.

[0072] (1)1m 3 The formula of biosynthesis-based environmental protection drilling fluid system 1 is:

[0073] 1.5% organic soil; 1.2% primary emulsifier; 2% secondary emulsifier; 1.5% calcium oxide; The volume ratio is 4:1; the rest is barite, aggravated to a density of 2.1g / cm 3 .

[0074] (2)1m 3 The formula of diesel-based drilling fluid system 2 is:

[0075] 1.5% organic soil; 1.2% main emulsifier; 2% secondary emulsifier; 1.5% calcium oxide; 3% fluid loss control agent; diesel oil and calcium chloride brine with a concentration of 30wt%, the volume ratio of the two 4:1; the rest is...

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Abstract

The invention discloses biosynthetic base oil, a biosynthesis based environmentally-friendly drilling fluid for shale gas drilling, and preparation methods and application of the biosynthetic base oil and the biosynthesis based environmentally-friendly drilling fluid, and belongs to the technical field of petroleum exploitation. The effective component of the biosynthetic base oil is poly-fatty acid methyl ester, and the structural formula of the poly-fatty acid methyl ester is as shown in the description, wherein n is a positive integer. The biosynthesis based environmentally-friendly drilling fluid for shale gas drilling, which is prepared from the biosynthetic base oil provided by the invention, is suitable for shale gas exploitation and has the advantages of high stability and high environmental friendliness.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a biosynthetic base oil, a biosynthesis-based environmental-friendly drilling fluid for shale gas drilling, and a preparation method and application thereof. Background technique [0002] With the increasing demand for oil and gas resources, my country has accelerated the development and utilization of shale gas. However, unconventional oil and gas extended-reach wells, horizontal wells, and directional wells in shale gas blocks have high requirements on the performance of drilling fluids, mainly manifested in the outstanding wellbore stability of open-hole sections, which require drilling fluids to have strong inhibition; Rotary steerable tools are planned to be used in the section and horizontal section, which have high requirements for drilling fluid plugging and anti-collapse; the horizontal section is longer and has higher requirements for lubricity. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/34C08G63/52E21B21/00
CPCC08G63/52C09K8/34E21B21/00
Inventor 唐燕金鑫李占国谭文军张东
Owner ANTON OILFIELD SERVICES (GRP) LTD
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