Reservoir Architecture Characteristics of Braided River Delta Front in the Second Member of Shahejie Formation, Yong8 Fault Block, Shengli Oilfield(PDF)
《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]
- Issue:
- 2015年第06期
- Page:
- 10-21
- Research Field:
- 基础地质与矿产地质
- Publishing date:
Info
- Title:
- Reservoir Architecture Characteristics of Braided River Delta Front in the Second Member of Shahejie Formation, Yong8 Fault Block, Shengli Oilfield
- Author(s):
- WANG Guan-min; LI Ming-peng
- 1. School of Geosciences, China University of Petroleum, Qingdao 266580, Shandong, China; 2. Langfang Branch of PetroChina Research Institute of Petroleum Exploration and Development, Langfang 065007, Hebei, China
- Keywords:
- braided river delta; reservoir; architecture; prograding body; distributary channel; mouth bar; Shengli oilfield; Dongying sag
- PACS:
- P618.13；TE122.2+1
- DOI:
- -
- Abstract:
- Lots of petroleum exploration for braided river delta reservoirs has entered high water cut stage in China, but the study on reservoir architecture of braided river delta is few, so that it affects the potential of digging residual oil for this kind of reservoir. Taking the thick sandbody in the second member of Shahejie Formation of Yong8 fault block, Shengli oilfield as a research object, according to the cores, well logging, seismic and development data, the main interval was divided into compound sedimentary body of delta front with the limitation of the fifth surface and single sedimentary body of delta front with the limitation of the fourth surface by interbed. The single sedimentary body of delta front includes architecture elements such as underwater distributary channel, overbank sandbody of channel periphery, main mouth bar, periphery of mouth bar and interdistributary bay, etc. The boundary of sandbody and superimposed relationship were divided according to the difference of well logging curve, lateral change of sandbody thickness, argillaceous sediment between sandbodies, and the number difference of interbeds; the architecture style of single sedimentary body of braided river delta front both in plane and profile was confirmed; the basic process of layer-by-layer progradation for each architecture unit of single sedimentary body was explained; the characteristics of braided river delta in this block were discussed, including the channel being narrow, thin and straight, and the mouth bar being wide, thick and lateral. The width of mouth bar for braided river delta in the second member of Shahejie Formation of the block is 2.23-8.95 times of that of distributary channel, and the thickness is 1.25-2.50 times of that of the distributary channel.
Last Update: 2015-11-27