• Wednesday, April 15, 2015

    classification of the reservoir rocks

    petroleum reservoirs

    classification of the reservoir rocks petroleum reservoirs Drilling  Well logging

    Is tha portion of acontainer that contains the oil and gas found under ground

    petroleum reservoirs

    consists of two necessary element

    categorization of the reservoir rock

    Nearly all reservoirs are in unmetamorphased sedimentry displace and most of them in limestones,sandstones,dolomites

    categorization of the thing rocks should be simplex and effortless but decisive becouse the petroleum geologist deals with galore categories of

    non geologists in the create and should transport his noesis as simple and as cuneate as viable to them

    a simpe primary classification of reservoir rocks based largely on 
    :the origin of the rock divides them into three groups

    Chimically or biochemically precipitated reservoir rocks

    Fragmental or clastic reservoir rocks

    Miscellaneous reservoir rocks

    chimical reservoir rocks

    The consist of mineral matter that was precipated at the place where the rocks were formed and arent transported

    The chief chemical reservoir rock are carbonate sediment mostly limestone and dolomites as pricipitated as crystalline but some time consist of chalk an marl

    The main biochimical agents in forming limestones are the algae,bacteria,corain,molluses,bryozoa,brachiopoda,and foraminifera

    Limestone and dolomites are the most important of the chimical reservoir rock they contain nearly half of the world petroleum resirvoir

    fragmental or clastic reservoir rocks

    classification of the reservoir rocks petroleum reservoirs Drilling  Well logging

    Fragmental reservoir rocks are aggregate of  particales fregments of mineral or fregments of older rocks

    They are also cslled clastic rock becouse they consist of mineral and rock particles washed from areas that have been eroded

    Particle size of rocks range from colloidal to boulders and pebbles

    miscellaneous reservoir rocks

    miscellaneous reservoir rocks include the igneous and metamorphic rocks mixtures of both frequeently forming the basement complex the reservoir space is usually in fractures in the brittle basement rocks However these are interesting geologically but rerely important commerically