一种测试油气藏岩石启动压力梯度的优化方法

doi:10.11743/ogg20170118

石油与天然气地质 ›› 2017, Vol. 38 ›› Issue (1): 175-180,196.doi: 10.11743/ogg20170118

一种测试油气藏岩石启动压力梯度的优化方法

朱维耀¹, 田巍^1,2, 朱华银³, 宋智勇¹, 孙岩¹

1. 北京科技大学土木与资源工程学院, 北京 100083;
2. 中国石化中原油田博士后科研工作站, 河南濮阳 457001;
3. 中国石油勘探开发研究院廊坊分院, 河北廊坊 065007

收稿日期:2015-06-18 修回日期:2016-03-25 出版日期:2017-02-28 发布日期:2017-02-27
第一作者简介:朱维耀(1960-),男,教授、博士生导师,渗流力学、流体力学和油气田开发。E-mail:weiyaook@sina.com。
基金项目:
国家重点基础研究发展计划（973计划）项目（2013CB228002）。

An optimization method to measure rock threshold pressure gradient of oil and gas reservoirs

Zhu Weiyao¹, Tian Wei^1,2, Zhu Huayin³, Song Zhiyong¹, Sun Yan¹

1. School of Civil and Resources Engineering, University of Science & Technology Beijing, Beijing 100083, China;
2. Working Station for Postdoctoral Scientific Research of Zhongyuan Oilfield Company Ltd., Puyang, Henan 457001, China;
3. Langfang Branch, Research Institute of Petroleum Exploration & Development, PetroChina, Langfang, Hebei 065007, China

Received:2015-06-18 Revised:2016-03-25 Online:2017-02-28 Published:2017-02-27

摘要/Abstract

摘要：

瞬间动用法和两端压力平衡法测定最小启动压力梯度，耗时都较长，且数据准确度不高。“压差-流量法”测试拟启动压力梯度，在定围压模式下的测试结果会偏大。基于上述分析，设计出了一体化实验流程，并制定出“非稳态动用-压力平衡法”，优选出“压差-流量法”最佳实现方式。该流程通过采用精密设备来保证测试数据的精确度，且适用各种渗透率范围岩心的测试。通过将本方法应用于吐哈油田岩心测试，测定结果符合预期，可以将该方法推广到实验室测量中。

关键词: 有效围压, 最小启动压力梯度, 压差-流量法, 非稳态动用-压力平衡法, 低渗透气田

Abstract:

Instantaneous threshold method and dual-ends pressure balance method are commonly used to test minimum threshold pressure gradient,but they are time-consuming and hard to ensure the accuracy of measurement data.The test results of pseudo threshold pressure may be slightly higher by using method of "differential pressure-flow" under constant confining pressure.Based on the above considerations,a set of integrated experiment process is designed,and the method of unsteady threshold-pressure balance is formulated.Also the way to implement the method of "differential pressure-flow" is optimized.The accuracy of the test results is ensured by using precise equipments in the experiment process,and the process is suitable for a wide range of core permeability test of threshold pressure gradient.Test results meet the expectation when this method is applied to well cores in Tuha oilfields,and this method can become a common measurement in the lab.

Key words: effective confining pressure, minimum threshold pressure gradient, method of differential pressure-flow, method of unsteady threshold-pressure balance, low permeability gas field

中图分类号:

TE37

朱维耀,田巍,朱华银,等. 一种测试油气藏岩石启动压力梯度的优化方法[J]. 石油与天然气地质, 2017, 38(1): 175-180,196. doi: 10.11743/ogg20170118 Zhu Weiyao,Tian Wei,Zhu Huayin,et al. An optimization method to measure rock threshold pressure gradient of oil and gas reservoirs[J]. Oil & Gas Geology, 2017, 38(1): 175-180,196. doi: 10.11743/ogg20170118

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一种测试油气藏岩石启动压力梯度的优化方法

An optimization method to measure rock threshold pressure gradient of oil and gas reservoirs

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