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Evaluation method of crude oil paraffin inhibitor

An evaluation method and wax inhibitor technology, which are applied in the field of oilfield chemistry, can solve the problems affecting the effective evaluation of the wax inhibitor, long time, inaccurate data, etc., to achieve accurate and reliable experimental results, shorten the evaluation time, and good contrast. Effect

Inactive Publication Date: 2015-08-26
E TECH ENERGY TECH DEV CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no industry standard for the determination and evaluation of the wax-repellent rate of wax-removing and anti-wax agents. The existing methods are cumbersome, complicated, time-consuming, and inaccurate, which affects the effective evaluation of wax-repellents on site, and even causes problems such as shutdown of oil field production.

Method used

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  • Evaluation method of crude oil paraffin inhibitor
  • Evaluation method of crude oil paraffin inhibitor
  • Evaluation method of crude oil paraffin inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of evaluation method of crude oil wax inhibitor, comprises the following steps:

[0029] 1) Take a sample: take the crude oil emulsion that has not been separated into water as a sample;

[0030] 2) Add wax inhibitor: Use a 100ml centrifuge test tube, add 80g of on-site oil-water sample after weighing, cover the bottle stopper and place it in a water bath with constant temperature (oilfield field temperature), after a certain period of constant temperature (the purpose is that the oil-water sample reaches Take it out; add a certain concentration of anti-wax agent, and shake it by hand for 100 times to mix the medicine and oil evenly;

[0031] 3) Wax stained wall weighing test piece treatment: pre-treated the surface of the on-site material test piece (the size can be customized according to the internal volume of the centrifuge tube, such as 5cm / 0.15cm / 1.3cm / 0.8cm (long, thick and wide holes)), Analytical balance weighs and records its initial mass, and then use...

Embodiment 2

[0050] A kind of evaluation method of crude oil paraffin inhibitor, process step, use crude oil, experiment temperature etc., are the same as embodiment 1.

[0051]

[0052] This embodiment has positive effects such as simplicity, quickness, reliable data, and the ability to more accurately screen and evaluate wax inhibitors suitable for use in oil fields, and can slow down the precipitation of wax around the well wall, production casings, and oil pipelines. Guarantee the normal production and operation of the oil field.

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Abstract

The invention relates to an evaluation method of a crude oil paraffin inhibitor, and belongs to the technical field of oilfield chemistry. The evaluation method of the crude oil paraffin inhibitor comprises the following steps: 1) taking a test sample: taking a crude oil emulsion as the test sample, wherein water in the emulsion is not separated in the scene; 2) adding a paraffin inhibitor: weighing a container, adding the test sample into the container, sealing the container and keeping constant temperature to the oilfield scene temperature, adding the paraffin inhibitor into the container, shaking and vibrating the container; 3) weighing paraffin sticking to the container wall: performing constant temperature treatment on the container containing the paraffin inhibitor and the crude oil emulsion under the condition of the in situ temperature of the oilfield, placing the container upside down under the condition of constant temperature, and weighing the container after the container is placed upside down; 4) carrying out a blank test: carrying out a blank test without adding the paraffin inhibitor at the same time; 5) calculating the paraffin inhibiting ratio: calculating the paraffin inhibiting ratio according to the following formula: X1= (m1-m2) / m1*100 %. The evaluation method has the advantages of being simple and convenient, quick, reliable in data, and capable of screening and evaluating paraffin inhibitors applicable to oilfield more accurately, can slow down the precipitation of paraffin, and guarantees the normal production and operation of the oilfield.

Description

technical field [0001] The invention belongs to the technical field of oilfield chemistry, and in particular relates to an evaluation method of a crude oil wax inhibitor. Background technique [0002] At present, crude oil is mostly rich in wax. During the production process, as the temperature and pressure drop and change, the wax in crude oil will gradually precipitate and deposit around the well wall, production casing and oil pipeline, affecting the normal production of crude oil. The most commonly used method in oilfields is the chemical wax removal method, which has the advantages of convenient construction and low cost. It can not only solve the problem of wax deposition in oil wells, but also reduce the deposition of crude oil in pipelines, oil transportation equipment and storage tanks. There is no industry standard for the measurement and evaluation of the wax-repellent rate of wax-removing and anti-wax agents. The existing methods are cumbersome, complicated, time...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/00
Inventor 唐勇王吉刘玉良
Owner E TECH ENERGY TECH DEV CORP
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