SEDIMENTARY CHARACTERISTICS OF TWO KINDS OF BEACH-BARS OF OLIGOCENE SHAHEJIE FORMATION IN WESTERN HUIMIN DEPRESSION,CHINA
-
摘要: 通过地质、测井、地震及室内综合分析,对渤海湾盆地惠民凹陷西部下第三系沙河街组三段、四段发育的两种滩坝沉积进行了研究。结果表明,两种滩坝均发育在构造运动平缓时期的浅水地区,具有较高的成分成熟度和结构成熟度。砂质滩坝主要发育在陆源碎屑物质供应充分的沙三段上部并可进一步划分出五种微相。生物碎屑滩坝主要发育在陆源碎屑物质供应不足、气候湿润的沙四段上部。两种类型的滩坝砂体储集物性良好,是有利的油气聚集带。Abstract: Two kinds of beach-bars deposited in Member Sha-3 and Member Sha-4 of the Oligocene Shahejie Formation in western Huimin depression,Bohaiwan basin are analyzed in terms of geological,well test,seismic and office analysis.The results have shown that two kinds of beach-bars formed in shallower water environment in weak tectonic activity period and have high degree of compositional maturity and textural maturity.The sandy beach-bars developed in the upper Member Sha-3 of the Shagejie Formation,where terrigenous materials supplied enough,which can be divided into five microfacies.Bioclastic beach-bars mainly developed in upper Member Sha-4 where terrigenous materials supplied insufficiently and was in humid climate period.The reservior quality of sand bodies of two kinds of beach-bars are fine and favorable for oil and gas enrichment.
-
Keywords:
- bars /
- sand bodies /
- sandstone /
- lithofacies /
- Huimin deppression
-
计量
- 文章访问数: 44
- HTML全文浏览量: 23
- PDF下载量: 2
下载:
