利用自然伽马及能谱测井判断水淹层及水淹级别

Use of Natural Gamma Ray or Natural Gamma Ray Spectromtry Log to Determine Water-Flooded and Levels of Water-Flooded

地层水洗后,注入水溶解地层中的某些放射性物质,吸附放射性物质的泥土被冲洗,在泥质被冲走的地层,往往出现比原来要低的放射性异常,没有开采的水淹层,往往只形成一个高的放射性注水前沿,而强水淹后的地层,放射性不但不升高,测量的铀的含量反而减小。应用上述放射性物质的变化,可以帮助识别水淹层、判断油层水淹状况。

Waterflooding is the most commonly used techniques in the oil field Mid- and late development. When the formation was washed, the injected water dissolving certain radioactive substances of the formation, and the water washed away the radioactive substances that adsorbed soil in the muddy strata. The strata often appeared to be lower than the original radioactive anomalies, there is no exploitation of the flooded layer. Often only the formation of a high--level radioactive water front, while the strong post--flood strata, not only did not increase radiation to measure the uranium but reduced. Application of the above--mentioned changes in radioactive substances that can help identify the flooded layer, to determine reservoir flooded conditions.