多孔介质高温高压多组分气体-原油分子扩散系数研究

杨璐; 贺振华; 文晓涛; 杨小江; 盛秋红

doi:10.3969/j.issn.1673-8926.2012.05.021

岩性油气藏 >

2012 , Vol. 24 >Issue 5: 111 - 115

DOI: https://doi.org/10.3969/j.issn.1673-8926.2012.05.021

油气田开发

多孔介质高温高压多组分气体-原油分子扩散系数研究

杨璐 ,
贺振华 ,
文晓涛 ,
杨小江 ,
盛秋红

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1.西南石油大学油气藏地质及开发工程国家重点实验室，四川成都610500； 2.中国石油长庆油田分公司第二采油厂，甘肃庆阳745100； 3.中国石油勘探开发研究院廊坊分院，河北廊坊065007； 4.西安长庆科技工程有限责任公司，陕西西安710018

叶安平（1984-），男，西南石油大学在读博士研究生，研究方向为油气渗流理论。地址：（610500）四川省成都市新都区西南石油大学石油工程学院。E-mail：156830216@qq.com

网络出版日期: 2012-10-20

基金资助

国家自然科学基金项目“多孔介质中CO2-多组分原油非平衡扩散理论研究”（编号：21143011）和高校博士点基金项目“高温高压多组分凝析气非平衡相态理论模型研究”（编号：20115121110002）联合资助。

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Study on gas-oil diffusion coefficient in porous media under high temperature and high pressure

YANG Lu ,
HE Zhenhua ,
WEN Xiaotao ,
YANG Xiaojiang ,
SHENG Qiuhong

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1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation， Southwest Petroleum University， Chengdu 610500， China； 2. No.2 Oil Production Plant， PetroChina Changqing Oilfield Company， Qingyang 745100， China； 3. Langfang Branch, PetroChina Research Institute of Exploration & Development， Langfang 065007， China； 4. Xi’an Changqing Technology & Engineering Company Ltd.， Xi’an 710018， China

Online published: 2012-10-20

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摘要

目前气体-原油分子扩散系数的研究对象多为单组分气体-原油体系，而且多在低温或者低压下在 PVT 筒中进行实验，与实际的注气过程相差较大。在这种情况下，研究了多孔介质中高温高压下多组分气体-原油的扩散系数，测试了全直径岩心中多组分气体-凝析油、多组分气体-重质原油在60 ℃，20 MPa 条件下的扩散系数。研究结果表明：原油组分对扩散有一定影响，但对于最终扩散程度影响不大；气体在凝析油中的扩散系数高于其在重质原油中的扩散系数；扩散系数以幂函数形式逐渐增加，最终逐渐趋于平缓。

关键词： 频率衰减属性; 深层碳酸盐岩; 油气勘探

本文引用格式

杨璐 , 贺振华 , 文晓涛 , 杨小江 , 盛秋红 . 多孔介质高温高压多组分气体-原油分子扩散系数研究[J]. 岩性油气藏, 2012 , 24(5) : 111 -115 . DOI: 10.3969/j.issn.1673-8926.2012.05.021

Abstract

The study ofmolecular diffusion coefficient for gas-oil systemfocuses mostly on the single gas-oil system, and the diffusion coefficient is measured in the PVT tube under lowpressure or lowtemperature. Under the circumstances, this paper tested the effective diffusion coefficient between the gas injected and oil in porous media under high temperature and pressure, and also tested the diffusion coefficient of gas-condensate oil systemand gas-heavy crude oil systemin the full diameter core under 60℃and 20MPa respectively. The results showthat the components of crude oil have a little influence on the diffusion coefficient. The gas diffusion coefficient in condensate oil is higher than that in heavy oil. The diffusion coefficient follows a power function and increases with the increasing of time, and the curve flattens gradually finally.

Key words： frequency attenuation attributes; deep carbonate rock; oil and gas exploration

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