低渗致密油藏早期合理产能的微观因素  

Microsopic Factors of Early Reasonable Productivity of Low Permeability Tight Reservoir

作　　者：张顺康[1] 阿迪莱·库尔班 ZHANG Shun-kang;ADILAI Kuerban(Exploration and Development Research Institute of Jiangsu Oilfield,Sinopec,Yangzhou 225009,China;Petroleum Engineering Institute of Xi'an Shiyou University,Xi'an 710065,China)

机构地区：[1]中国石化江苏油田勘探开发研究院,扬州225009 [2]西安石油大学石油工程学院,西安710065

出　　处：《科学技术与工程》2024年第31期13351-13358,共8页Science Technology and Engineering

基　　金：中国石化集团公司科技攻关项目(P20070-5)。

摘　　要：矿场实践表明,低渗致密油藏微观渗流规律对油井早期产能具有重要影响。基于江苏油田花瓦、永联区带近10个致密油区块近60块岩心微观渗流实验结果及生产动静态参数,分析评价了目标区块储层特征,构建了相应的渗流模型及两相流动产能方程。进一步通过开展单因素和多因素叠加对产能影响程度的分析,明确了影响目标区块早期合理产能的主控因素及其对产能影响的影响程度。结果表明,当考虑单因素影响时,启动压力梯度和产水率对致密油开采影响显著;当考虑多因素叠加效应时,典型井产能下降最高达89.25%。研究结果可以为改善低渗致密油藏渗流模式、合理配产提供合理依据,有助于有效开发低渗致密油藏。Field practice has shown that the micro permeability law of low-permeability tight oil reservoirs has a significant impact on the early productivity of oil wells.Basing on the micro permeability experimental results and dynamic-static parameters of nearly 60 cores from nearly 10 tight oil blocks in Huawa and Yonglian zones of Jiangsu Oilfield,the reservoir characteristics of the target block were analyzed and evaluated.Corresponding seepage models and two-phase flow productivity equation were constructed.Through the analysis of the influence degree of single factor and multi-factor superposition on productivity,the main controlling factors affecting the early reasonable productivity of the target block and the sensitivity of the influence on productivity were clarified.The results indicate these as follows when considering the influence of single factors,the starting pressure gradient and water production rate have a significant impact on tight oil development.When considering the superposition effect of multiple factors,the productivity of typical wells decreases by up to 89.25%.The research results can provide a reasonable basis for improving the the seepage mode and reasonable production allocation,contributing to effectively develop low permeability tight reservoirs.

关 键 词：低渗致密油藏 合理产能 微观因素 产能方程 渗流模式 

分 类 号：TE345[石油与天然气工程—油气田开发工程]