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- Title
松辽盆地徐家围子断陷沙河子组物源与沉积体系 分析.
- Authors
钟安宁; 周翔
- Abstract
The Shahezi formation is one of the most important exploration targets in the northern Songliao Basin, where complicated and shifting provenance severely restricts the study of sedimentary systems and the forecast of tight gas reseivoirs. We check the properties of the parent rock and provenance direction system, based on the data for the mineral composition of clasolite, conglomerate component, combination of heavy minerals, and seismic reflection features. The result is that there are three provenances, such as the Anda uplift in southwest? paleo-central uplift in the west? and Xudong slope in the east, and the parent rock properties are different from each other. The sedimentary facies in the Anda area are influenced by the Anda uplift in the southwest, while the source direction is mainly southwest to northeast and west to east. The provenance of the Xuxi Sag is mainly from the paleo-central uplift in the west, and the source direction is west to east. The Songzhan area and Xudong sag are influenced by the Xudong slope in the east, and the source directions are mainly northeast to southwest and east to west. The sediments on the western side, which is the steep slope belt of the fault depression, are mainly fan-delta deposits, while sediments on the east gentle slope are mainly braided river delta deposits. The sedimentary system of the Shahezi Formation is a result of the union of fault activity, provenance, and geomorphic features, while the sediment filling system is influenced by fault activity, sediment scale depends on the provenance supply, and sediment direction is determined by geomorphic features.
- Publication
Acta Sedimentologica Sinica, 2020, Vol 38, Issue 3, p610
- ISSN
1000-0550
- Publication type
Article
- DOI
10.14027/j.issn.1000-0550.2019.060