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Micro model wettability accuracy control technology

A wettability and microscopic technology, which is applied in the field of petroleum exploration and development in oil fields, can solve the problems of wettability change, poor model wettability stability, and low control precision of microscopic model wettability, and achieve good stability and wettability. Controlling the effect of high precision

Inactive Publication Date: 2014-01-22
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

This wettability control technology has the following disadvantages: 1) The wettability control accuracy of the microscopic model is low, and can only be controlled within ±30° of the set contact angle, especially the wettability of the neutral and lipophilic models. The wettability control is difficult to achieve the required goal; 2) The wettability stability of the model is poor, and the wettability has changed greatly after oil flooding and brine flushing

Method used

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  • Micro model wettability accuracy control technology

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Effect test

Embodiment 1

[0022] A microscopic glass model wettability control agent, wherein the microscopic glass model wettability control agent is polymethyl methacrylate, polystyrene and polyethylene. Polymethyl methacrylate is a white powder particle, which is used for models whose contact angle is less than 90°; polystyrene is a white transparent particle, which is used for models whose contact angle is between 90°-140°; polyethylene is a white opaque particle , for models with contact angles greater than 140°.

[0023] Microscopic glass model wettability control method:

[0024] 1) Put the slides to be tested in 10% sodium hydroxide solution and heat for 1 hour to remove surface organic impurities, then bake in a special oven at 70°C for 2-4 hours

[0025] 2) Wash the used beakers, Erlenmeyer flasks and other glass instruments with clean water and then with distilled water, and put them in a special oven at 70°C for 2-4 hours.

[0026] 3) Accurately weigh 2g, 3g, and 4g of polymethyl methacry...

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Abstract

The invention belongs to the technical field of oil field petroleum exploration and development and in particular relates to a novel micro glass model surface wettability control agent and a novel micro glass model surface wettability control method. According to the technical scheme, the micro glass model wettability control agent comprises methyl methacrylate, polystyrene and polyethylene; synthetic materials with different wetting properties are attached to the surface of a glass model, and then wettability is accurately controlled by virtue of concentrations of the synthetic materials; the micro glass model wettability control agent prepared by adopting a new technology is high in control accuracy, good in stability and resistant to scouring. The micro glass model wettability control agent is mainly applied to making of indoor micro glass models in the petroleum industry and applicable to research on micro simulation of oil displacement.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploration and development in oil fields, and in particular relates to a novel microscopic glass model surface wettability control agent and a control method. Background technique [0002] The pore level (average pore size is 25-250μm) microscopic physical model is the basis of microscopic physical simulation experiments. The surface properties of reservoir rocks will change at different development stages. How to approximate the conditions of reservoir rocks with the indoor glass model from the perspective of surface properties is a key link in various comparative experiments. Physical simulation technology is an important prerequisite for studying the mechanism of oil displacement. [0003] Young's equation is the quantitative theoretical basis for the study of wetting phenomena. The surface energy of a solid is high, that is, the gas-solid surface tension is large, and the liquid droplets a...

Claims

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Application Information

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IPC IPC(8): C03C17/28
Inventor 孙志刚陈亚宁王曦耿建梅陈霆刘丽孟小海姚风英杨伟宇刘津王磊苏法卿
Owner CHINA PETROLEUM & CHEM CORP
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