测试制度对气井产能测试的影响及校正方法
The influence of test system on gas well productivity test and correction method
赵洪涛1
作者信息
- 1. 中法渤海地质服务有限公司 天津 300457
- 折叠
摘要
海上气井产能测试过程中,因求产时间短,储层低渗等因素影响,井底流压往往难以达到稳定状态,造成产能评价误差大,甚至出现产能方程异常的现象.为有效消除此类影响,从试井渗流理论出发,在分析测试制度对产能影响规律的基础上,建立了基于不稳定试井分析结果进行流压校正的产能评价方法.对渤海某低渗气藏A-1井进行实例应用,结果表明,校正前、后计算的气井无阻流量相对误差达到8.35%,校正后的结果更接近投产后的实际生产数据,证实该方法有助于提高气井产能评价结果的准确性,更好地指导合理配产.
Abstract
In the process of offshore gas well productivity testing,due to the influence of short production time and low permeability of the reservoir,it is often difficult to reach a stable state of flow pressure at the bottom of the well,which results in large errors in the productivity evaluation and even abnormalities in the production capacity equations.In order to effectively eliminate this kind of influence,based on the theory of seepage flow in test wells,and the analysis of the influence law of the testing system on productivity,this paper establishes a productivity evaluation method for flow pressure correction based on the analysis results of unstable test wells.A case study was applied to well A-1 of a low-permeability gas reservoir in the Bohai Sea.The results showed that the relative error of open flow of gas wells calculated before and after correction reached 8.35%,and the corrected results were closer to the actual production data after production,confirming that this method can help to improve the accuracy of gas well productivity evaluation results and better guide the reasonable production allocation.
关键词
气井产能/流压校正/测试制度/叠加原理/无阻流量Key words
gas well productivity/flowing pressure correction/testing system/superposition principle/open flow引用本文复制引用
出版年
2024
NETL
NSTL
万方数据