Research on Diagenesis System of Yanchang Formation Reservoirs,Southeast Ordos Basin
详细信息
- 责任者：Ding Xiaoqi (State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Zhang Shaonan
- 刊名：Acta Sedimentologica Sinica
- 出版年：2011
- 卷期：29(1)
- 关键词：砂岩储集层 ; sandstone reservoirs ; 成岩作用 ; diagenesis ; 鄂尔多斯盆地 ; Ordos Basin
- 页码：p.97-104
- 图表：5 illus., 25 refs.
- 分类号：1003
- issnNo：ISSN1000-0550
- isbnNo：CN62-1038/P
摘要
Yanchang Formation sited in the southern-eastern Ordos Basin has been proven a prolific reservoir unit for hydrocarbon resources. By analyzing the petrophysic data from thin-section samples, BSE, Energy Spectrum Analysis and core plugs, the authors reached the following conclusions: 1) the rimming of chlorite has an important control on the reservoir quality-such diagenetic process is characterized as a product of delta front depositional environment where is mineralogically rich in black mica and feldspar; 2) it effectively reduced the compaction effect from the overburden through burial history; 3) the associate presence of calcite re-orientated the grains into porphyroblastic structure, but arbitrarily distributed due to the small quantity; and 4) authquartz has a prominent vertical change, which is often observed as small crystal forming with chlorite rimming in a close space
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