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米氏旋回是米兰科维奇效应在地层记录中的表现形式,其代表的时间涵义是进行高分辨率地层划分、对比的有效手段,为了揭示地层中米氏旋回信息保存的差异性,完善地层学尤其是旋回地层学理论,文章依据济阳坳陷38口钻井不同层位地层的自然伽玛测井数据,应用一维连续小波变换模极值法进行了米氏旋回信息提取,并分别计算了岁差、黄赤夹角和偏心率周期在多套地层中的响应厚度及其变化特征.结果表明,研究区多套地层中普遍存在米氏旋回信息.其中早古生代(∈-O)、晚古生代(C-P)和新生代(E-N)地层中岁差旋回层厚度的变化范围分别为3.4～17.1m,8.6～19m和7～11m,其中优势旋回层厚度分别为13,14和10m;黄赤交角旋回层的厚度变化分别为7.2～27.8m,19.5～39.2m和14～26m,其中的优势旋回层厚度分别为27,26和21m;偏心率旋回层的厚度变化分别为20.3～64.6m,37.2～75.1m和40～60m,其中的优势旋回层厚度分别为60,74和51m.中生代(J-K)地层中岁差、黄赤交角和偏心率旋回层厚度变化范围分别为3.2～21.4m,6.2～42.8m和15.4～108.6m,未发现明显的优势旋回层.由此看出,米氏旋回层厚度的变化幅度随地质年代的变老有增大趋势,认为保存在较老地层中的米氏旋回信息因受到后期地质事件的影响稳定性变差;中生代米氏旋回层厚度的变化幅度最大,认为与济阳坳陷中生代时期复杂的构造环境造成的沉积环境分异度高有关.此外,根据优势米氏旋回层的厚度估算了不同时代的地层堆积速率并予以解释.
Mie cycle is the manifestation of Milanovic effect in stratigraphic record. The time meaning of its representation is an effective means to divide and contrast high-resolution stratigraphy. In order to reveal the difference of Mie cycle information in stratigraphy and improve stratigraphy Especially cyclone stratigraphy theory, based on the data of natural gamma ray logging in different strata of 38 wells in Jiyang Depression, the paper uses the one-dimensional continuous wavelet transform modulus extremum method to extract the Mie cycle information and calculates The results show that the Mie cycle information is widespread in many sets of strata in the study area, and the Early Paleozoic (∈-O), late The thickness of the precession cyclotron in the Paleozoic (CP) and Cenozoic (EN) strata ranged from 3.4 to 17.1 m, 8.6 to 19 m and 7 to 11 m, respectively, of which the thickness of the dominant layers was 13, 14 and 10 m, respectively. The thickness of the cyclotron varies from 7.2 to 27.8 m, 19.5 to 39.2 m and 14 to 26 m, respectively, and the thickness of the dominant cyclotron is 27, 26 and 21 m, respectively. The variations of the thickness of the eccentric layer are 20.3 to 64.6 m and 37.2, respectively ~ 75.1m and 40 ~ 60m The dominant layers of gyration are 60, 74 and 51 m, respectively.The thickness of the epicyclists in the Mesozoic (JK) strata range from 3.2 to 21.4 m, 6.2 to 42.8 m and 15.4 to 108.6 m, respectively, No obvious dominant cyclotron was found, which shows that the magnitude of the change in the thickness of the Miocene gyration layer tends to increase with the age of the geologic age. It is believed that the Mie cyclotron information preserved in the older strata, due to late geological events The influence of stability is worse.The thickness of Mesozoic Mie cycles is the largest, which is related to the high differentiation of sedimentary environment caused by the complex tectonic environment in the Mesozoic Era of Jiyang Depression.In addition, Stratum accumulation rates of different ages are explained.