水平井七点法井网水淹窜流通道识别技术

长庆油田超低渗透油藏是典型的“三低油藏”，储层致密、物性差、孔喉细微，常规直井开发单井产量低，采用水平井开发是提高单井产量的有效途径。目前华庆油田试验区部署七点法水平井井网，采用超前注水技术和水力喷射分簇多段压裂改造工艺，正常井产量是常规直井的3～4倍，但部分水平井投产后高含水，甚至水淹，分析认为注采井之间的裂缝型窜流通道是主要原因。研究建立了超低渗透油藏窜流通道判别指标体系，运用模糊聚类分析方法对井组注水井进行分类，筛选优势注水井，为下步治理奠定了基础。运用该方法分析计算了水淹井平A井、平B井，得到了各自对应的优势注水井，经现场动态验证，与计算结果一致，表明该方法能够应用于超低渗透油藏水淹水平井窜流通道的识别，具有一定的实用性。

Identification Tech for Channeling of Water Flood in Seven-Spot Well Net of the Horizontal Well

The ultra-low permeable reservoir of Changqing oilfield is the typical three low reservoirs.For tightness of reservoirs,poor physical properties,and slight pore throat,the production of single vertical well is low,and the horizontal well is the key effective manner to increase single well production.At present,because Seven-spot well net of the Horizontal Well in Huaqing area of Changqing oilfield is deployed and the advanced injection technology and the hydraulic jet clustering multi-stage fracturing technology are used,the production of a normal horizontal well is 3～4 times of that for a conventional vertical well.However,content of water in parts of horizontal well after produced is high and that even are water flooded.It believed that the fractured channeling between injection and production wells is the main reason.A channeling path identification(CPI) index system has been established for ultra-low permeability reservoir.By using fuzzy clustering analysis method to classify the well group of injection wells,screening the advantages of injection wells,the foundation for the next step of treatment is made.Using this method to analyze and calculate the flooded wells of horizontal A well,horizontal B,the respective Superior injection wells have been obtained,and is as same as the calculated results by field dynamic verification.It indicates that this method can be applied to identify channeling in ultra-low permeability reservoir of the flooded horizontal well,and has a certain practicality.