Research on Types of Oil Reservoirs and Character of Oil-Water Distribution in Heidimiao Layer

Abstract:

This paper takes Yingtai area which is located in the south of Qijia-Gulong sag and part of central sag area in the north of the Songliao Basin as the research area. Then combining all information of core, logging, three-dimensional seism and well testing data, it studies the reservoir type and oil-water distribution characteristics of Heidimiao by analyzing the comparison charts of sandstone, profile map of reservoir, T₀₇ structure diagram, well testing data, stratum thickness, sandstone thickness, ratio of sandstone thickness to stratum thickness, porosity values, permeability contour maps. The reservoir lithology of Heidimiao oil layer is siltstone-oriented with poor physical property. The main controlling factor of oil-water distribution is the lithology, followed by the structure. Heidimiao oil layer mainly includes three types, lithological oil reservoir, lithological - structural oil reservoir and structural oil reservoir, among which lithological reservoir plays a dominant role. Its oil-water distribution is characterized by the pattern of upper-water and bottom-oil; when the fault acts as the pathway for the longitudinal migration of oil and gas, the pattern changes to the upper-oil and bottom-water. This research could provide reliable geological basis for the research of old well re-examination, favorable area evaluation and horizontal well drilling design.

• Periodical: Advanced Materials Research (Volume 772)
• Pages: 789-794
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.772.789
• Online since: September 2013
• Authors: Gui You Lv
• Keywords: Characteristics of Oil-Water Distribution, Comparison Chart of Oil Reservoir, Lithological Oil Reservoir, Oil Reservoir Type

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