Impact of Differential Diagenetic Evolution on the Chronological Tightening and Pore Evolution of Tight Sandstone Reservoirs—A Case Study from the Chang-7 Tight Turbidite Sandstone Reservoir in the Southwestern Ordos Basin(PDF)
《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]
- Issue:
- 2016年第01期
- Page:
- 79-92
- Research Field:
- 基础地质与矿产地质
- Publishing date:
Info
- Title:
- Impact of Differential Diagenetic Evolution on the Chronological Tightening and Pore Evolution of Tight Sandstone Reservoirs—A Case Study from the Chang-7 Tight Turbidite Sandstone Reservoir in the Southwestern Ordos Basin
- Author(s):
- LUO Jing-lan; LUO Xiao-rong; BAI Yu-bin; LUO Chun-yan; BAI Xue-jian; LI Xiang-jun; LI Chi
- 1. State Key Laboratory of Continental Dynamics, Northwest University, Xi’an 710069, Shaanxi, China；2. Key Laboratory of Petroleum Resource Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China; 3. School of Earth Sciences and Engineering, Xi’an Shiyou University, Xi’an 710065, Shaanxi, China
- Keywords:
- petrological component; differential diagenetic evolution; reservoir chronological densification; pore evolution; turbidite sandstone; Chang-7; Ordos Basin
- PACS:
- P618.130.2；TE122
- DOI:
- -
- Abstract:
- The diagenesis, authigenic products and diagenetic evolution process restricted by the sandstone detrital components of Upper Triassic Chang-7 turbidite sandstones from the southwester Ordos Basin were studied. Impact of the differential diagenetic evolution process on the chronological tightening, pore evolution and sandstone reservoir quality was also elucidated, based upon observation of cores, observation, identification and quantitative statistics of conventional, fluorescent and casting thin sections by vacuum impregnated with epoxy resin under microscope equipped by fluorescence system, measurement of sandstone pore and pore throat image, porosity and permeability, capillary pressure, and analysis of homogenization temperature and Laser-Raman chemical composition of fluid inclusions, combined with the previous research result of the LA-ICP-MS in-situ U-Pb dating provenance tracing from the detrital zircons in the Chang-8-Chang-6 sandstones. The results show that the Chang-7 sandstone types and their petrological components and primary reservoir capacity are controlled by provenance and parent rocks; distribution of the sandstone type and the detrital minerals shows some regulation vertically; the sandstone types and the skeleton minerals influence the diagenetic process and experience certain differential diagenetic evolution process, and finally lead to sandstones tightened chronologically, which result in heterogeneity in the pore evolution, pore structure and reservoir quality heterogeneous distribution temporally and spatially.
Last Update: 2016-01-30