摘要
对于注水开发油田，通常使用放射性同位素测井测量注水井的吸水剖面。但由于不同地层其孔喉半径不同、受注入水的冲刷程度不同，当向井内注入粒径较小的放射性同位素载体后，对部分孔喉半径大、受注入水的冲刷程度严重的井，其小粒径同位素载体不是滤积在井壁附近，而是注入到探测器无法探测到的远离井筒部位，造成测量结果失真。通过改用大粒径同位素载体测量吸水剖面，不但可以提高资料的准确度，而且可以更明确地划分吸水层位。
Injectivity profile is commonly determined with radioisotope tracer test in water-flood oilfield. However,when the finer-grained radioisotopic carrier is injected into a fully-flushed well with lop throat radius, it will flow into the deeper formation beyond the radius of investigation rather than being precipitated over the surface, thus the result is distonional. When it is measured with cone-grained isotope carrier, it can improve the accuracy and make a more distinct division of injectivity horizon.
出处
《新疆石油地质》
CAS
CSCD
1999年第4期307-309,共3页
Xinjiang Petroleum Geology
关键词
油田
注水井
同位素测井
吸水剖面
油气勘探
Karamay oilfield
Water injection well
Isotope
Well logging
Injectivity profile
