Fine Anatomizing Reservoir Architecture of Fan-Delta Front: A Case Study on Dujiatai Reservoir in Shu2-6-6 Block, Liaohe Oilfield
详细信息
- 责任者：Lin Yu (College of Geoscience ; China University of Petroleum ; Beijing 102249 ; China) ; Wu Shenghe
- 刊名：Natural Gas Geoscience
- 出版年：2013
- 卷期：24(2)
- 关键词：储集层描述 ; reservoir description ; 辽河平原 ; Liaohe Plain
- 页码：p.335-344
- 图表：illus., 19 refs.
- 分类号：1003
- issnNo：ISSN1672-1926
- isbnNo：CN62-1177/TE
摘要
Fan-delta front reservoir is an important reservoir in China,whose movable residual oil reserves account for 17.4% of all movable residual oil reserves in clastic reservoir.At present,research on reservoir architecture of fan-delta front is few,especially the architecture of the fan-delta front reservoir.It is difficult to meet the demand on prediction of residual oil distribution in this type reservoir.Taking Dujiatai reservoir in the Shu2-6-6 block of Liaohe oilfield as an example,we analyzed the characteristics of different architecture elements of fan-delta front,determined the hierarchical system of architecture and anatomized the compound and single sandbodies using various data including cores,well logging and production performance data.The results show that braided channel,mouth bar and overflow as architecture elements are developed in the study area.The compound sandbody composed of different elements shows 3 kinds of distributional patterns.The recognition of single sandbody depends on the vertical and lateral symbols.The vertical symbols include muddy intercalations and calcareous intercalations.The lateral symbols include difference on elevation,lateral overlay between different single sandbodies and so on.Different types of single sandbody has differences in distribution and scale.The braided channel is 0.8 to 6.6 meters thick and 100 to 400 meters wide.The mouth bar is 1.2 to 6 meters thick and 200 to 710 meters wide.The width and thickness of two the types of sand bodies both show a typical exponential relationship.Finally,according to the qualitative and quantitative anatomizing achievements of reservoir architecture,three-dimensional reservoir architecture model is established precisely to find and produce remaining oil.
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