摘要
苏东区致密气田部分水平井压裂改造后仍产量低、增产效果差。研究对苏东气田20口投产井分类评价,提出适用气田实际的静态分类新指标,并利用物质平衡法、Blasingame递减曲线图版拟合法及数值模拟法评价投产井目前泄气面积,分析井控条件及裂缝参数与目前泄气面积的匹配关系。研究表明:研究区I类井25%,II类井20%,Ⅲ类井55%,确定加权气层厚度符合苏东气田气井分类的静态指标;随投产井水平段长度、缝高、缝宽、缝长的增加及裂缝间距的减小,气井泄气面积变大;储层条件越差,气井泄气面积受压裂改造参数的影响越敏感。研究结果为气田开发制定合理工作制度和生产措施提供一定理论依据。
During the development process of Sulige tight gas field, part of horizontal wells are still low produc- tion after fractured. Classification of 20 brought-in wells is conducted and analysed the correlation between static and dynamic classification criteria. The drainage area is calculated by material balance method, Blasingame decline curve chart fitting method and numerical stimulation method. The matching relationship of well control, the parame- ters of fractures and drainage area of gas well is also analyzed. The study shows ： Type I , lI , m well occupies 25 % , 20% , 55%. gas formation weighted accumulative thickness and AOF have good indication. With the increase of the length of the horizontal well, fracture height, fracture width, fracture length and the decrease of intervals be- tween fractures, the drainage area of gas wells would increase. The gas well drainage area is more sensitive to frac- turing parameters when the reservoir condition becomes more worse. This study can help to establish reasonable working system and productive measure for gas field development.
出处
《科学技术与工程》
北大核心
2013年第25期7322-7326,共5页
Science Technology and Engineering
基金
中石油重大科技专项(2008E-1305)
泰山学者建设工程专项经费项目(TS20070704)资助
关键词
致密气藏
气井分类
静态指标
裂缝参数
泄气面积
tight gas gas well classification static index fracture parameterdrainage area
