天然气工业2009，Vol.29Issue(11)：22-26,5.DOI:10.3787/j.issn.1000-0976.2009.11.007
深层裂缝性致密碎屑岩气藏高效储渗区识别——以川西新场气田上三叠统须家河组气藏为例
Identification of high efficiency payzones with high permeability indeep fractured tight detrital reservoirs: A case study of gas reservoirs in the Upper Triassic Xujiahe Formation of Xinchang gas field in western Sichuan Basin
叶泰然 1张虹 1唐建明1
作者信息
- 1. 中国石化西南油气分公司勘探开发研究院德阳分院
- 折叠
摘要
Abstract
The tight detrital gas reservoirs in the second member of the Upper Triassic Xujiahe Formation (T_3x~2) in western Sichuan Basin are featured by strong heterogeneity. Sizable fracture networks, together with relatively quality reservoirs, result in high efficiency payzones with high permeability, is critical to the success of exploration and development in drilling. Based on 3D 3C seismic data, we performed correlation of logging and wave impedance features with seismic responses, and forward modeling. We built up a model to identify high efficiency payzones with high permeability by using dim spots of "weak chaotic reflection", and then identified two types of dim spots, i.e. "single weak" and "double weak" of PP-and PS-wave. Based on an analysis of their geological and geophysical genetic mechanisms, the "double weak" mode is believed to be the optimal. High ef-ficiency payzones with high permeability are identified through absorption-enhancing processing of the weak chaotic reflection and visualization of pixel image.关键词
晚三叠世/裂缝性油气藏/致密砂岩/三维三分量技术/暗点/高效储渗区/四川盆地/西Key words
Upper Triassic/fractured reservoir/tight sand/3D 3C technique/dim spot/high efficiency payzones with high
permeability/Sichuan Basin/west分类
天文与地球科学引用本文复制引用
叶泰然,张虹,唐建明..深层裂缝性致密碎屑岩气藏高效储渗区识别——以川西新场气田上三叠统须家河组气藏为例[J].天然气工业,2009,29(11):22-26,5.
