本文選題：南圖爾蓋盆地 + 米氏旋回　； 參考：《沉積學(xué)報》2017年03期

【摘要】：將天文軌道周期與不同級別的旋回聯(lián)系起來,旨在使米蘭科維奇周期這一高精度時間標(biāo)尺納入高頻層序地層劃分中,實現(xiàn)高精度旋回的識別與劃分。以哈薩克斯坦南圖爾蓋盆地Aryskum地塹Ary301井為例,基于不同沉積特征,分別對卡拉甘塞組I~IV段自然伽馬測井?dāng)?shù)據(jù)進行頻譜分析和連續(xù)小波變換,結(jié)果顯示沉積地層中保存完好的米蘭科維奇旋回,天文軌道周期對Aryskum地塹沉積過程具有明顯影響,并將31.9~39.5 m旋回厚度解釋為受400 kyr長偏心率周期控制,11.9~14.2 m,6.7~8.8 m旋回厚度分別受125 kyr和95 kyr短偏心率周期控制。對長、短偏心率周期進行濾波分析后,與天文模型理論周期曲線進行對比,建立卡拉甘塞組的浮動天文年代標(biāo)尺,分別以400 kyr、125 kyr偏心率周期濾波曲線作為中期和短期旋回劃分的參考曲線,共識別出11.5個中期旋回和47個短期旋回,為高頻旋回劃分提供了一種不受人為因素影響的天然標(biāo)準(zhǔn),保證了研究區(qū)旋回劃分的科學(xué)性和統(tǒng)一性。
[Abstract]:The astronomical orbit period is connected with the cycles of different levels in order to bring Milankovich period, a high precision time scale, into the high frequency sequence stratigraphic division, and to realize the recognition and division of high precision cycles. Taking Aryskum graben Ary301 well in South Turgai Basin of Kazakhstan as an example, based on different sedimentary characteristics, spectrum analysis and continuous wavelet transform of natural gamma logging data of I~IV section of Karagansi formation are carried out respectively. The results show that the well-preserved Milankovich cycle in sedimentary strata and the astronomical orbit period have obvious influence on the deposition process of Aryskum graben. The thickness of 39.5 m cycle is interpreted as being controlled by the long eccentricity period of 400 kyr. The thickness of the cycle is controlled by the short eccentricity period of 125 kyr and 95 kyr, respectively. After filtering and analyzing the long and short eccentricity periods, compared with the theoretical periodic curves of astronomical model, the floating astronomical age scale of Karaganser group was established. Taking the kyr eccentricity periodic filter curve of 400kyr ~ (-1) as the reference curve for dividing the medium and short term cycles, a total of 11.5 intermediate cycles and 47 short term cycles were identified, which provided a natural standard for the high frequency cycle division without the influence of human factors. It ensures the scientific nature and unity of the cycle division of the research area.
【作者單位】： 頁巖油氣富集機理與有效開發(fā)國家重點實驗室;中國地質(zhì)大學(xué)(北京)能源學(xué)院;中國石油化工股份有限公司石油勘探開發(fā)研究院;
【分類號】：P534.52

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