靖边气田低效储量评价与可动用性分析

靖边气田是风化壳型碳酸盐岩气藏，目前处于开发中期，保持气田稳产是靖边气田面临的核心问题，而低效储量是靖边气田储量接替的重要领域。在低效储量分布特征的基础上，将靖边气田低效储量分布分为3种类型：低效储量与优质储量垂向叠加型;低效储量与优质储量侧向连通型;低效储量孤立分布型。研究结果表明，孤立型低效储量规模小，垂向叠加型和侧向连通型低效储量是靖边气田储量接替的重要类型。针对垂向叠加型和侧向连通型低效储量分布特征，采用数值模拟方法对低效储量可动用性进行分析和评价。研究结果表明，低效储层渗透率、低效储层布井方式（井距)、低效储层气井配产是影响低效储量动用程度的最主要因素。

The evaluation and recoverability analysis of low-quality reserves in Jingbian gas field

The Jingbian gas field is a carbonate weathering crust gas reservoir in the middle development stage. A core issue that the Jingbian gas field encounters is to maintain the stable production. The low-quality reserves are of importance for future reserve succession in Jingbian gas field. According to the distribution characteristics, the low-quality reserves in Jingbian gas field were divided into three types, i.e., the vertically stacked, laterally connected and separately distributed reserves of low- and high- quality. Of these, the separately distributed reserves of low quality were found in a small scale, whereas those vertically stacked and laterally connected reserves of low quality were considered to be the major types for reserve succession. Accordingly, a numerical simulation method was employed to evaluate and analyze the recoverability of the vertically stacked and laterally connected low-quality reserves. Results indicated that the permeability, well distribution pattern (well spacing) and gas-well production allocation were the most important factors that influenced the recovery rate of low-quality reserves.