大庆地区自然伽马能谱与岩性参数的关系

RELATIONSHIPS BETWEEN NATURAL GAMMA RAY SPECTROMETRY AND ROCK CHARACTER PARAMETERS IN DAQING OILFIED

根据大庆油田6口探井的290块岩心样自然伽马能谱数据,以及室内测量和分析的岩样岩性参数,建立了自然伽马能谱的数据库管理系统,在讨论了该地区的放射性核索钍(Th),铀(U)和钾(K)的分布规律的基础上,从地质和物理条件入手,通过数据库管理系统绘出的Th-U交会图划分了大庆地区地层的岩性,得到了大庆地区自然伽马能谱与泥质含量,阳离子交换量、Al-Si比等岩性参数的关系,从而为该地区的地层评价和自然伽马能谱测井资料的解释,提供了充分的理论依据。

According to Natural Gamma Ray Spectrometry(NGS) data of 6 test well's 290 rock samples and according to measured and analysed rock character parameters of rock specimen in the laboratory, beginning from geologic and physical conditions, we have discussed the content distribution-law of thorium (Th), uranium (U) and potassium (K) in Daqing. We have built the ralationships between NGS and shaliness, cationic exchange charge (CEC), and ratio of aluminum-silicon, etc. That will provide a scientific basis for the stratigraphic appraisal and the information about natural gamma ray spectrometry logging.