摘要
在油田开发过程中，由于注水等生产措施的影响，造成地层流体矿化度发生变化，使得利用电阻率判断地层含油性的测井方法无法准确对地层的含油性作出解释。利用次生伽玛能谱测井所提供的岩性指数（ＬＩＲ）、含盐指数（ＳＩＲ）、热中子衰减指数（ＭＳＩＤ）及硅钙比等参数，作为判断水淹层、确定水淹程度的手段。
During the oil development, the formation water salinity varies continu- ously because of the stage of water (or steam) injection. How to identify the water- flooded zones was the main problem met during the oil development to keep on a steady oil production, since there were some limitation. in conventional logging interpretation to recognize the characteristics of waterflooded zone. Making use of the lithology-indi- cator ratio (LIR ) , salinity indicator ratio (SIR ) , thermal neutron decay indicator (MSID) and Si/Ca value provided by induced γray spectral logging, we can approxi- mately identify the waterflooded zones.
关键词
水淹层
伽玛能谱测井
油田开发
waterflooded zone, induced γ─-ray spectral log, oil development
