Physical property response characteristics to sedimentation and diagenesis of reservoir
SHI Jian-chao1, SUN Wei1, ZHANG Chuang2, MO Jian-wu3,DING Lei2, ZHANG Feng1
(1 Key Laboratory of Continental Dynamics of Ministry of Education, Northwest University, Xi′an 710069, Shaanxi, China;2 Yanchang Petroleum Group Research Institute, Xi′an 710069, Shaanxi, China; 3 Exploration and Development Research Institute, Zhongyuan Branch Company of SINOPEC, Puyang 457001, Henan, China)
Abstract:
The rock characteristics, physical property, diagenesis and the process of porosity evolution are analysed in E1f3 reservoir of Shanian oilfield, Subei basin. On the basis,the control action of physical property from sedimentation and diagenesis is analysed,and the related factors are quantitatively analyzed by mathematical statistics method.The research shows that physical property is obviously controlled by sedimentary microfacies and diagenesis, and from subsea distributary channel, mouth bar to sheet, physical properties become worse. The porosity decreases 13.3% by compaction, 9.5% by quartz secondary outgrowth and carbonatite cementation in early phase, and increases 11.9% by feldspar, debris and interstitial material corrosion, and decreases 9.7% by hydrosialite, quartz secondary outgrowth, and ankerite cementation and metasomasis in late phase. The main control factors of physical property in study area are clast size, compaction, cementation and corrosion.
KeyWords:
sedimentation; diagenesis; physical property; Subei basin
