Reservoir fracture characteristics of Xiasiwan oil fields Yanchang formation and its effect on water injection developmentChinese Full Text
YUAN Guang-jin;SONG Si-yuan;Shaanxi Yanchang Petroleum( Group) Co. ,Ltd.;Chang’an University;
Abstract: To mark the development characteristics of the fractured reservoir of Xiasiwan Oil fields Yanchang formation clearly,improve high-yielding fractured wells exploration and the water injection results,we analyze the effect of fracture characteristics and water injection through core,multi-scale microscopic section to descripe cracks and conventional logging fracture identification. Study has shown that: The reservoir fracture develops,whose microfracture face rate is about 0. 5 1%,and the mian cracks are unfilled high angle extensional tectonic cracks,and mainly distributes in the Chaiyao and Meiquan area;cracks are developed in the various layers,and are bottom-up with good continuity; reservoir mainly develops cracks in three groups,which the most development is northeast 80 degrees,causing water injection quick,seeing the water quickly,flooding fast. Through these studies suggest that controling the main direction cracks’ s water injection intensity,injection cycle and well network optimization,eventually forming different well spacing linear water injection network which injects water along cracks are the comprehensive reorientation to make water injection program and improve the water injection result of ultra-low permeability reservoir.
Keywords：
reservoir fracture; water injection development; Yanchang formation; Xiasiwan oil field; Ordos Basin;
- DOI：
10.13800/j.cnki.xakjdxxb.2014.0511
- Series：
- Subject：
- Classification Code：
P618.13
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