Cementation txo cov porosity thiab permeability ntawm cov xuab zeb. Qee qhov xwm txheej, txawm li cas los xij, kev daws cov cement lossis nplej tuaj yeem thim qhov qauv no.
Dab tsi cuam tshuam rau qhov porosity ntawm sediments lossis pob zeb?
Ntau yam tuaj yeem cuam tshuam qhov porosity. Nyob rau hauv cov pob zeb sedimentary thiab sediments, tswj ntawm porosity muaj xws li sorting, cementation, overburden stress (txog rau faus qhov tob), thiab grain shape.
Puas Lithification nce porosity?
Piv txwv li, digenetic dolomitization yuav ua rau nce mus rau 13% porosity, uas tuaj yeem raug rhuav tshem tom qab los ntawm cementation lossis txhim kho los ntawm kev sib cais. Inasmuch raws li cov txheej txheem mechanical yog unidirectional thiab feem ntau irreversible, tejzaum lawv ua lub luag haujlwm tseem ceeb hauv kev hloov cov thawj (primary) porosity ntawm carbonate pob zeb.
Compaction thiab cementation cuam tshuam li cas rau qhov porosity ntawm pob zeb sedimentary?
Compaction yog txheej txheem kuaj mob uas pib ntawm kev faus neeg thiab tej zaum yuav txuas ntxiv thaum lub sij hawm faus rau qhov tob ntawm 9 km (30, 000 ft) lossis ntau dua. Kev ntsuas nce nce qhov ntom ntom ntawm pob zeb, nce nws txoj kev muaj peev xwm, thiabo-txo porosity.
Yuav ua li cas thaum cementation?
Cementation, hauv geology, hardening thiab welding ntawm clastic sediments (cov tsim los ntawm cov pob zeb uas muaj nyob rau hauv cov pob zeb) los ntawm nag lossis daus ntawm cov ntxhia hauv qhov pore. Nws yog theem kawg ntawm kev tsim cov pob zeb sedimentary.
