Depositional Characters of the Sand-Mudstone in the Bottom of Bachu Formation in Tahe Oilfield

• 责任者：Feng Mingyou (College of Resources and Environment ; Southwest Petroleum University ; Chengdu 610500 ; China) ; Zhang Fan
• 刊名：Geoscience
• 出版年：2010
• 卷期：24(5)
• 关键词：砂岩 ; sandstone ; 泥岩 ; mudstone ; 沉积相 ; sedimentary facies ; 新疆 ; Xinjiang
• 页码：p.919-924
• 图表：5 illus., 14 refs.
• 分类号：1003
• issnNo：ISSN1000-8527
• isbnNo：CN11-2035/P

Based on detailed description and observation of drilling cores,  integrated with logs,  casting thin-sections and seismic attributes analysis,  the sedimentary systems consisting of alluvial fan,  lagoon,  barrier-type coastal are identified in the study area. Flower-like sand bodies of alluvial fan as non-reservoir developed along NE-SW direction in northern study area next to well S85, with a large set of conglomerate. Lagoon deposits distributed in axis of Akekule ancient uplift in southern study area are made up of calcareous mudstone and marlite. Barrier Island in southern study area distributes along the NEE direction, and parallels to the axis of the uplift. Fine sandstone of coastal shore facies deposited in the southwest part of working area. Sandstones of the barrier bar and shore facies are both favorable reservoirs.