Reservoir characteristics and controlling factors of the lower part of Member 1 of Paleogene Shahejie Formation in Tang 34 Block，Huanghua Depression
Zhang You1,2, Hou Jiagen1,2, Li Na1,2, Sun Haihang1,2
1 College of Geosciences，China University of Petroleum（Beijing），Beijing 102249 2 State Key Laboratory of Petroleum Resources and Prospecting，China University of Petroleum（Beijing），Beijing 102249
Abstract：Based on core observation and sedimentary facies analyses，the reservoir characteristics of the lower part of Member 1 of Paleogene Shahejie Formation in Tang 34 Block and the main geological factors influencing its physical properties are systematically studied by using a large number of rock thin sections，thin sections，porosity and permeability properties and mercury-injection data, etc.The results indicate that the lower part of Member 1 of Paleogene Shahejie Formation reservoir belongs to middle to low porosity，low to extra-low permeability and fine throat reservoir.Reservoir properties of the study area are dominated by diagenesis，and combination pattern of sandstone and mudstone.Among them，carbonate cement，silica cement and clay mineral transformation are the main factors leading to the poor physical properties，while the corrosion produces substantial secondary porosity and provides favorable reservoir space.Authigenic kaolinite is the dissoluted product of feldspar and debris.Vertical distribution of reservoir properties are controlled by combination of sandstone and shale.
Zhang You,Hou Jiagen,Li Na et al. Reservoir characteristics and controlling factors of the lower part of Member 1 of Paleogene Shahejie Formation in Tang 34 Block，Huanghua Depression[J]. JOPC, 2012, 14(3): 383-392.
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