考虑动态补给的致密强非均质气藏气井新模型

New model of gas wells under consideration of dynamic supplying in tight sandstone gas reservoirs with great heterogeneity

许珍萍 廖红梅 李小锋 罗建宁 王文胜

中国石油长庆油田分公司苏里格气田研究中心，陕西 西安 710018 低渗透油气田勘探开发国家工程实验室，陕西 西安 710018

苏里格气田是典型的致密强非均质气藏，气井生产动态特征与常规气藏存在很大差别，如何客观、准确地认识气井动态特征对致密气田开发及生产预测具有至关重要的作用。文中深入研究该气田单井地质、动态特征，发现单井存在明显的分区补给特征。通过质量守恒和镜像法建立苏里格气田考虑动态补给的气藏物理模型，并且依托数值试井技术描述近井储层特征，综合气井生产历史和单井地质特征，实现气藏补给模型的精细刻画，提出气藏补给方向和补给能力定量化描述的研究方法，创新性建立了符合苏里格气田特征的补给气藏模型，为致密气藏的科学开发提供新认识。

Sulige gas field is a typical tight sandstone gas reservoir with great heterogeneity, the dynamic characteristics of gas well are very different from conventional gas reservoirs. Both the development and production forecast of gas fields are highly affected by correct understanding of dynamic characteristics of low-permeability gas reservoirs. In this paper, the geological and dynamic characteristics of gas wells are deeply studied, and compartmentalization in gas reservoir has been summarized. Based on the conservation of mass and the mirror method, a physical model of gas wells in Sulige gas field considering dynamic supplying is established. The characteristics of near-well reservoir are described using the numerical well test, and fine description of the model with recharge capacity will be implemented through analyzing gas well production history and single well geological characteristics comprehensively. The method of quantitative description of the supply direction and recharge capacity of gas reservoir is put forward, and new model of gas wells under consideration of dynamic supplying that meets the characteristics of Sulige gas field is established, which provides a new viewpoint for the scientific development of tight gas reservoir.

10.6056/dkyqt201802022