Fluid Flow through Sand Injectites Intruded in Low Permeability Host Rocks

1 H-23 Fluid flow through sand injectites intruded in low permeability host rocks R. JONK A. HURST J. PARNELL Department of Geology & Petroleum Geology University of Aberdeen AB24 3UE Aberdeen UK Summary Fluid flow histories within sand injectites are deduced using diagenetic studies of three main events occurring within such bodies. The three main events taking place within sand injectites are from early to late: a. the development of deformation bands; b. precipitation of carbonate cements in pore spaces; c. the precipitation of cements in tectonic veins. Deformation bands provide information on the fluids driving injection carbonate cementation is