高温高压非稳态气水相渗测试装置及方法

doi:10.3969/j.issn.1006-6535.2021.02.011

特种油气藏 ›› 2021, Vol. 28 ›› Issue (2): 78-82.DOI: 10.3969/j.issn.1006-6535.2021.02.011

高温高压非稳态气水相渗测试装置及方法

张广东¹, 吴铮¹, 李钇池¹, 陈一健¹, 杨青松^1,2, 潘毅¹

1.西南石油大学,四川成都 610500;
2.中海石油湛江分公司,广东湛江 524057

收稿日期:2020-02-15 修回日期:2021-01-10 出版日期:2021-04-25 发布日期:2022-02-16
作者简介:张广东(1980—),男,高级实验师,2003年毕业于西南石油学院勘查技术与工程专业,2014年毕业于成都理工大学油气田开发工程专业,获博士学位,现主要从事地层流体相渗、渗流及提高采收率等领域研究工作。
基金资助:
国家科技重大专项“超深层低渗气藏有效开发技术”(2016ZX05015-005)

Testing Device and Method for Unsteady Gas-water Relative Permeability under High Temperature and High Pressure

Zhang Guangdong¹, Wu Zheng¹, Li Yichi¹, Chen Yijian¹, Yang Qingsong^1,2, Pan Yi¹

1. Southwest Petroleum University, Chengdu, Sichuan 610500, China;
2. CNOOC Zhanjiang Branch, Zhanjiang, Guangdong 524057, China

Received:2020-02-15 Revised:2021-01-10 Online:2021-04-25 Published:2022-02-16

摘要/Abstract

摘要： 目前高温高压气藏气水相渗曲线多采用非稳态测试方法获取,测试装置主要采用回压阀控制流体压力,但高温高压条件下易产生压力波动,气水计量易产生偏差。为此,提出了一种基于电容法的高温高压非稳态气水相渗测试装置及方法,测试装置引入了自主研制的电容式液位计量计,实验温度和压力分别提高到200.0 ℃和80.00 MPa,通过液体体积与电容变化计量产水量,通过电动涡轮计量泵控制流体压力、计量气体体积,根据实验测试数据分析了流体压力和油藏温度对气水相渗曲线的影响。结果表明:相同条件下,实验温度升高,束缚水饱和度变小,气水共渗区域变宽;实验流体压力降低,束缚水饱和度变大,气相相对渗透率变小。研究成果对高温高压气藏开发方案设计、动态分析及气水渗流规律认识具有一定指导意义。

关键词: 气水相渗, 相渗测试, 非稳态, 高温, 高压, 实验, 电容法

Abstract: At present, gas-water relative permeability curves of gas reservoirs with high temperature and high pressure are mostly obtained by unsteady testing method. The testing device is mainly equipped with back pressure valve to control fluid pressure. However, the pressure is easy to change under high temperature and high pressure, resulting in deviation in gas-water measurement. For this reason, this paper proposed a testing device and method for unsteady gas-water relative permeability under high temperature and high pressure based on the capacitance method. The testing device was fixed a self-developed capacitance liquid meter. The experimental temperature and pressure were increased to 200.0 ℃ and 80.00 MPa, respectively. The water production rate was measured by the change of liquid volume and capacitance. An electric turbo-metering pump was used to control the fluid control and measure the gas volume. The influence of fluid pressure and oil reservoir temperature on the gas-water relative permeability curve was analyzed on the basis of experimental test data. The results showed that under the same conditions, when the experimental temperature was increased, the irreducible water saturation was lower and the gas-water co-permeation area was wider; when the experimental fluid pressure was decreased, the irreducible water saturation was higher and the relative permeability of the gas phase was lower. The study results are of great significance for guidance in the development scheme design, dynamic analysis and understanding of gas-water seepage rules of gas reservoirs with high temperature and high pressure.

Key words: gas-water relative permeability, relative permeability test, unsteady state, high temperature, high pressure, experiment, capacitance method

中图分类号:

TE135

张广东, 吴铮, 李钇池, 陈一健, 杨青松, 潘毅. 高温高压非稳态气水相渗测试装置及方法[J]. 特种油气藏, 2021, 28(2): 78-82.

Zhang Guangdong, Wu Zheng, Li Yichi, Chen Yijian, Yang Qingsong, Pan Yi. Testing Device and Method for Unsteady Gas-water Relative Permeability under High Temperature and High Pressure[J]. Special Oil & Gas Reservoirs, 2021, 28(2): 78-82.

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高温高压非稳态气水相渗测试装置及方法

Testing Device and Method for Unsteady Gas-water Relative Permeability under High Temperature and High Pressure

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