Laminated Sandstone Reservoir

However structures from several millimetres to many centimetres.

Laminated sandstone reservoir. 2 shallow marine inner shelf sandstone this facies association con sists of generally upward coarsening sequence of from bottom to top mudstone ms heterolithic facies hb and or bioturbated and lami nated sandstone sb sl overlain by cross bedded glauconitic sand stone sx. When sandstone contains petroleum that can be extracted by known technology it is referred to as a sandstone reservoir. Sample output from meta lam spreadsheet for laminated shaly sandstone. Sandstone reservoirs are normally composed of stable minerals e g quartz feldspar and rock fragments accessory minerals and pores saturated with fluids.

In geology lamination is a small scale sequence of fine layers laminae. Determining porosity and permeability in laminated sandstones for combined co2 geothermal reservoir utilization inproceedings pradhan2015determiningpa title determining porosity and permeability in laminated sandstones for combined co2 geothermal reservoir utilization author s. Revised 11 december 1992. Probe permeametry applied to a highly laminated sandstone reservoir christian halvorsen statoil po box 300 n 4001 stavanger norway received 27 june 1991.

Geologists use the term clastic with reference to sedimentary rocks as well as to particles in sediment transport whether in suspension or as bed load and in sediment deposits. Lamina that occurs in sedimentary rocks laminae are normally smaller and less pronounced than bedding lamination is often regarded as planar structures one centimetre or less in thickness whereas bedding layers are greater than one centimetre. At higher volumes of bioturbation fluid flow becomes increasingly isotropic due to greater amounts of burrow interpenetrations across mud laminae. Accepted 14 december 1992 approximately 5200 permeability measurements were made with an automated probe permeameter on 5 m of centre cut core from a north sea well.

In the massive sandstone model no flow barriers exist. Gas oil ratios are approximately 700 to 1 and original bottomhole pressures between 4 600 and 6 300 psi. Marchand sandstone pay thicknesses range up to 125 ft. In contrast the non reservoir heterolithic core plug has poor sandstone connectivity and low computed permeability results that are not consistent with the reference reservoir sandstone.

3 d imaging allows characterization of the connectivity of sandstone layers which is an essential factor to permeability in heterolithic rocks. Laminated and parallel laminated sandstone facies sc. Clastic rocks are composed of fragments or clasts of pre existing minerals and rock. Primary recoveries should range between 12 and 16 of the oil in place and reserves for the.

In the laminated sandstone models horizontal shale laminae and low bioturbation intensities promote lamination parallel fluid flow. Meta lam calculate restivity models and hester quality spreadsheet. To be classified as sandstone individual sand grains must be.