层序格架内成岩特征差异及其成因机制

发布时间：2018-05-17 03:42

本文选题：层序 + 成岩作用　；参考：《中国石油大学学报(自然科学版)》2017年02期

【摘要】：综合利用各项资料,结合孔隙演化定量研究方法,对层序格架内成岩特征差异及成因机制进行研究。结果表明:层序格架内成岩特征差异包括层序界面和层序单元两个方面;层序界面对胶结作用和溶蚀作用控制较强,界面附近胶结物含量一般更高,部分层序界面附近溶蚀强度更大;层序单元方面,受层序演化控制,不同单元沉积环境、沉积物特征不同,经历相同的成岩过程后,其压实、胶结、溶蚀作用强度不同;对于压实作用,早期海侵前滨砂岩和早期高位过渡带砂岩强度较高,而晚期海侵临滨砂岩程度较弱;对于胶结作用,早期高位过渡带砂岩、早期海侵前滨砂岩、晚期海侵临滨砂岩胶结强度依次减弱;对于溶蚀作用,早期海侵前滨砂岩、晚期海侵临滨砂岩、早期高位过渡带砂岩强度依次增强。
[Abstract]:The difference of diagenetic characteristics and the genetic mechanism of diagenesis in sequence framework are studied by comprehensive use of various data and quantitative study method of pore evolution. The results show that the difference of diagenetic characteristics in sequence framework includes two aspects: sequence interface and sequence unit, the sequence interface controls the cementation and dissolution strongly, and the content of cemented matter near the interface is generally higher. In the aspect of sequence unit, it is controlled by sequence evolution, the sedimentary environment and sediment characteristics of different units are different, after the same diagenesis process, their compaction, cementation and dissolution intensity are different. For compaction, the strength of early transgressive foreshore sandstone and early highstand transitional zone sandstone is higher, while that of late transgressive coastal sandstone is weak, while for cementation, early high transitional zone sandstone, early transgressive foreshore sandstone, and early transgressive foreshore sandstone, The cementation strength of the late transgressive littoral sandstone decreased in turn; for dissolution, the strength of the early transgressive foreshore sandstone, the late transgressive coastal sandstone and the early high transitional zone sandstone increased in turn.
【作者单位】：中国石油勘探开发研究院;中国石油塔里木油田公司;中国石油大学地球科学学院;
【基金】：国家科技油气专项(2011ZX05009-003)
【分类号】：P618.13

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