Enrichment Regulation of Distributary Channel Sandbody and Rolling Development Practice in Bozhong C Area of Bohai Bay(PDF)
《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]
- Issue:
- 2016年第05期
- Page:
- 685-693
- Research Field:
- 基础地质与矿产地质
- Publishing date:
Info
- Title:
- Enrichment Regulation of Distributary Channel Sandbody and Rolling Development Practice in Bozhong C Area of Bohai Bay
- Author(s):
- ZHOU Jun-liang; HU Yong; LI Chao; XIE Jing; GENG Hong-liu
- Bohai Oilfield Research Institute, Tianjin Branch of CNOOC China Ltd., Tianjin 300452, China
- Keywords:
- petroleum distribution; distributary channel sandbody; shallow water delta; Minghuazhen Formation; enrichment regulation; well deployment; potential evaluation; Bohai Bay
- PACS:
- P618.13;TE122
- DOI:
- -
- Abstract:
- Distributary channel sandbody of shallow water delta is the most potential oil-bearing sandbody type and the main exploration and development target of Bozhong C area in Bohai Bay. According to the late-stage accumulation theory, combined with the characteristics of petroleum distribution revealed by the prospecting and development wells, the petroleum enrichment regulation of distributary channel sandbody was statistically discussed, and the potentials of developed and undeveloped distributary channel sandbodies were quantitatively analyzed in order to provide the basis for the practice of rolling development. The results show that the horizontal oilbearing distributary channel sandbody mainly distributes in the area within 5 km of primary faults in Bozhong C area on the plane, and the longitudinal oilbearing distributary channel sandbody mainly concentrates in the altitude of —1 780-—1 650 m; petroleum enrichment of distributary channel sandbody is horizontally controlled by the tectonic background and fault-sand contact relationship, and the petroleum is relatively enriched in the trap with large area and the distributary channel sandbody contacting with fault at high angle; petroleum enrichment is vertically controlled by the difference of base level cycle and the size of distributary channel sandbodies, and the distributary channel sandbodies in the single block with less than 5 km2 have high area filling rate in the middle-late stage of the rise of base level semi-cycle. Practice proves that the results make a better guidance to the rolling development, and are helpful to the efficient development and evaluation in this area, and have reference for the exploration and rolling development practice of similar blocks in Bohai Bay.
Last Update: 2016-09-30