辽河双台子构造带沙三段主要的沉积相类型与成因分析

沉积相研究是油气勘探、储层质量评价、盆地构造演化的基础和有力手段.本文从双台子构造带沙三段岩芯观察和描述出发,介绍了沉积物的颜色,识别了冲刷面、递变层理、块状层理、准同生变形构造等多种沉积构造,建立了砾岩相、砂岩相和泥岩相等3大类12小类的岩相组合、总结了正递变,反递变、正-反递变和非递变等4种相序.在此基础上,指出双...

Main Sediment Type and Genesis of E2s3 in Shuangtaizi Structure Belt, the West Sag, Liaohe

The study of sedimentary research is important to petroleum exploration, analysis of reservoir quality and tectonic evolution. Through core observing and describing of E2s3 in Shuangtaizi Structure Belt, colors of sediments were described. Sedimentary structures, such as erosion surface, grade bedding, massive bedding, penecontemporaneous deformation structures, were recognised. 3 types and 12 sub-types of lithofacies were builded. 4 kinds of facies sequences, including normal grading, inverse grading, normal-inverse grading and non-grading, were summarized. Base on these results, the main sedimentary facies of E2s3 in Shuangtaizi Structure Belt were middle sublacustrine fan, and slump. Genesis of sediment gravity flow depositions of E2s3 were episodicity flooding and earthquake, basing on the mud gravels with oxidation color and peneteconmporaneous deformation structures and combining the region tectonic evolution and paleoclimate. Tectonic, deposition, and climate co-controled forming and evolution of the sedimentary gravity flow of E2s3 in Shuangtaizi Structure Belt.