Title

Fine anatomization of reservoir architecture of lacustrine turbidite

作者

林承焰 2 任丽华 2 孙志峰¹

单位

中国石油大学（华东）地球科学与技术学院，山东青岛 266580 山东省油藏地质重点实验室，山东青岛 266580

Organization

School of Geosciences, China University of Petroleum, Qingdao 266580, China Shandong Province Key laboratory of Reservoir Geology, Qingdao 266580, China

摘要

浊积岩等岩性油气藏逐渐成为油气勘探与开发的重要目标。但是目前，国内外对湖相浊积岩的储层构型研究相对较少，难以满足浊积岩油藏精细描述的需求。为此，文中以东营凹陷现河庄油田河146断块沙三中亚段薄层浊积岩为例，建立滑塌浊积岩相储层构型划分方案，并分级次进行精细刻画。结果表明：1）无根型浊积岩发育期次多，规模小，扇体在垂向上局部叠置。复合扇体长580~2 000 m，宽350~1 000 m，厚2.4~5.1 m，面积0.3~1.2 km2；单一扇体长300~700 m，宽180~350 m，面积0.1~0.8 km2。2）有根型浊积岩中，浊积水道平面分布主要受底形影响，发育期次多，规模较大，侧向摆动快，垂向下切作用弱。水道复合体宽450~1 200 m，单一浊积水道宽120~450 m，厚1.6~7.2 m。最终，建立了符合研究区地质规律的构型模式，为浊积岩油藏精细描述及储层内部结构解剖提供了可靠的地质依据。

Abstract

Lithologic reservoirs gradually become an important target of exploration. At present, correlation studies are rare on reservoir architecture of lacustrine turbidites in China and abroad, which can hardly meet the needs of fine description of turbidite reservoirs. Therefore, the structure types of lacustrine turbidites are investigated respectively and hierarchically in the middle of E2s3 in He146 Fault Block of Xianhezhuang Oilfield. The results indicate that turbidite fan without sediment-supplying channel has the characteristics of multi-stages, small scale and vertical superimposition. Superimposed fans are 580￣2 000 m long, 350￣1 000 m wide, 2.4￣5.1 m thick and 0.26￣1.2 km2; the single fan is 0.08￣0.8 km2, 300￣700 m long and 180￣350 m wide; the lateral distribution of turbidity channels is controlled by bottom configuration with the characteristics of multi-stages, big scale, rapid lateral migration and vertical erosion; the superimposed channels are 450￣1 200 m wide while the single channel is usually 120￣450 m wide and 1.6￣7.2 m thick. Finally, the architecture mode consistent with local geological laws is established to guide the fine description and analyze the internal structure of turbidite reservoirs.

关键词：

浊积岩; 划分方案; 储层构型; 定量表征; 河146断块
;

Keywords:

turbidite; division scheme; reservoir architecture; quantitative characterization; He146 Fault Block
;

基金项目

DOI

10.6056/dkyqt201801002

湖相滑塌浊积岩储层构型精细解剖