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The previous researchs almost demonstrated the reservoir in Lower Oligocene sandstone has complicated distribution, probably low porosity and permeability, no nature flow are seen by wells. | TAÏP CHÍ PHAÙT TRIEÅN KH&CN, TAÄP 19, SOÁ K1- 2016 Main favorable factorscreatee oligocene formation become a petroleum prospect in south-east area, Cuu Long basin Tran Nhu Huy Faculty of Geology and Petroleum Engineering, Ho Chi Minh city University of Technology, VNU-HCMC & PVEP-POC Tran Van Xuan Nguyen Xuan Kha Thai Ba Ngoc Truong Quoc Thanh Ho Nguyen Tri Man Nguyen Dinh Chuc Faculty of Geology and Petroleum Engineering, Ho Chi Minh city University of Technology, VNU-HCMC Tran Duc Lan Vietsovpetro (Manuscript Received on August 10th, 2015; Manuscript Revised on October 20th, 2015) ABSTRACT The previous researchs almost demonstrated the reservoir in Lower Oligocene sandstone has complicated distribution, probably low porosity and permeability, no nature flow are seen by wells. Based on recent study results of depositional environment of E Oligocene sedimentary in Cuu Long basin and E sand distribution in blocks 01/10 & 02/10, block 09-2/09, block 09-2/10 and block 16-2 area, the paper determines depositional facies according to petrophysic and geophysic data. From Chrono-stratigraphy priciple, as well as interpretation and intergration of seismic data, well data, well log data, core & sample analysis results, petrophysic data, well test data, the paper forcuses on create correlation lines between wells and seismic line for confirming Oligocene E distribution in Cuu Long basin, buildup the gross mapping for depositional environment in sub-sequence Oligocene E upper and E lower and mapping of seismic attributes for sub-sequence Oligocene E upper and E lower.At last successfully predict the sand distribution in Oligocene E upper and E lower sub-sequence in research area and hence determine the stratigraphic traps in Oligocene formation of South-East area Cuulong basin. Key words: Lower Oligocene sandstone, low Pore-Perm, seismic attributes, petrophysiccurves, geophysiccharacteristics, prediction, distribution. Trang 169 SCIENCE & .
