致密储层衰竭开采规律研究

Study on Mining Failure Law of Tight Reservoir

许 洋 杨胜来 张占东 韩 伟

Xu Yang Yang Shenglai Zhang Zhandong Han Wei

中国石油大学(北京) 石油工程教育部重点实验室,北京 102249.

Key Laboratory of Petroleum Engineering of Ministry of Education,China University of Petroleum (Beijing),Beijing 102249,China

关键词: 致密油储层, , 经验公式, , 正交试验, , 启动压力梯度, 衰竭开采

There is usually a starting pressure gradient in the tight oil. This article considers the seepage law of the crude oil flowing from the matrix to the fractures in the formation under the premise of starting the pressure gradient and some assumptions. Through the establishment of numerical model, the relationship between the pressure, permeability, core size and other factors and the degree of failure recovery in the onedimensional space is analyzed, as well as the threedimensional plate is drawn. The results show that when the core scale is very small, the main factors affecting the degree of recovery are the failure pressure difference. At the same time when the scale increases, the relationship between the recovery degree and the core length and permeability is more and more significant. Then, based on the conclusion of the previous the paper put forward the empirical formula considering the degree of calculation and recovery under various factors, and extend the space to three dimensions. On the basis of one dimensional revise the formula, the empirical formula of the failure rate of three dimensional matrix failure is obtained. It provides some reference for production practice.

国家自然科学基金项目(51574257);国家重点基础研究发展计划(973计划)项目(2011CB707304)。

10.3969/j.issn.1672-6952.2017.02.008