油藏工程基础.pdf

BasicReservoir

Engineering

BasicReservoir

Engineering

RockTypes

TypesofRocks

•IgneousRocks(fromMagmawhencoolsandsolidifies)

–basalt(ext.),andesite,granite,gabbo(int.)etc.

•SedimentaryRocks(compressedandcemented)

–Clastic,OrganicandChemical

–sandstone,limestone,dolomite,shale,halite,etc.

•MetamorphicRocks(anytypechangebyheat/pressure)

–marble(metamorphosedlimestone),schist,gneiss,

etc.

•Majorityofimportanthydrocarbonreservoirsrocks

aresedimentaryrocks

SedimentaryRockClassification

ClasticRock-

FormedFromDebris(weatheringanderosion)ofOlderRock

RockTypeParticularDiameter

ConglomeratePebbles-2to64mm

SandstoneSand-0.06to2mm

SiltstoneSilt-0.003to0.06mm

ShaleClay-Lessthan0.003mm

Nonclastic-MostlyofChemicalorBiochemicalOrigin

RockTypeComposition

LimestoneCalcite-CaCO3

DolomiteDolomite-CaMg(CO3)2

SaltHalite-NaCI

GypsumGypsum-CaSO4.2H2O

ChertSilica-SiO2

CoalChieflyCarbon

TheRockCycle

nIgneousWeathering,transportSediments

oanddeposition

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