摘要
有水气藏高效开发不仅涉及地质与气藏工程,同时与排水采气工艺、地层水回注工程等环节密切相关,其核心在于能否正确评价有水气藏水体活跃性,从而有针对性地制定相应措施,提升有水气藏开发效果。为准确评价有水气藏水体活跃程度,首先通过大量调研工作得到可评价气藏水体活跃程度的8个指标,利用模糊分类法优选出其中6个作为关键指标。再以关键指标为基础,结合判别分析理论,将四川盆地典型有水气藏中101个出水井区作为学习样本进行建模训练,由此建立有水气藏水体活跃程度判别分析模型。将所建模型应用于SPC石炭系气藏典型出水井区,实例分析表明利用判别分析法建立的水体活跃程度评价模型与传统油藏工程类方法相比,该方法可避免较为复杂的水侵量计算环节,并且比单一生产类指标的评价精度更高,对于生产数据实时更新的矿场来说更为实用。
For most water-bearing gas reservoirs,the effective development depends on not only geological and reservoir engineering,but also drainage gas recovery and formation-water reinjection.Moreover,the most important is to correctly evaluate the water activity in these gas reservoirs and make effective measures for improving a development effect.So,after a lot of investigation and study,8 indexes were selected for water-activity evaluation,from which 6 were taken as the key ones by using fuzzy classification method.Then based on discriminant analysis theory,101 water-producing well blocks in many water-bearing gas reservoirs,Sichuan Basin,were selected as training samples.Furthermore,a discriminant analysis model was established to evaluate the water activity.And the model was applied to SPC Carboniferous gas reservoirs in one typical water-producing well block.Result from the discriminant analysis model is better than that from traditional reservoir engineering methods.On the one hand,it can reduce the calculation of water invasion;on the other hand,the evaluation accuracy is higher than that from one single production index.Therefore,it is more practical for a gasfield with real-time updating production performance data.
作者
郑果
王会强
赵益
张楷
郝煦
尹小红
魏星
马骥
Zheng Guo;Wang Huiqiang;Zhao Yi;Zhang Kai;Hao Xu;Yin Xiaohong;Wei Xing;Ma Ji(Exploration and Development Research Institute,PetroChina Southwest Oil&Gasfield Company,Chengdu,Sichuan 610041,China;Northeastern Sichuan Gas District,PetroChina Southwest Oil&Gasfield Company,Dazhou,Sichuan 635000,China)
出处
《天然气勘探与开发》
2022年第1期53-61,共9页
Natural Gas Exploration and Development
基金
中国石油西南油气田公司科技项目“不同类型气藏采收率评价方法及提高采收率对策研究”(编号:20210303-05)。
关键词
四川盆地
有水气藏
水体活跃程度
生产动态
判别分析
Sichuan Basin
Water-bearing gas reservoir
Water activity
Production performance
Discriminant analysis
