P608 FACTORS CONTROLLING QUARTZ CEMENTATION OF CAMBRIAN RESERVOIR SANDSTONES OF LITHUANIA 1 S. SLIAUPA L.LASHKOVA V. RASTENIENE and J.CYZIENE Institute of Geology Sevcenkos 13 2600 Vilnius Lithuania Summary Numerous oil fields are hosted by Cambrian siliciclastics of western Lithuania. The reservoir properties are primarily controlled by secondary quartz cementation. Its distribution shows regional-scale depth-dependent trend while local variations in western Lithuania are drastic and as yet not well understood. Temperature and formation water chemistry significantly contributed to the quartz cementation in regional scale. In local scale sin-depositional features (sand-clay fraction sorting) played important role leading to differentiation of water-film-diffusion (WFD)


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