Kinetic Model of Clay Mineral Transformation and is Applications

Key words: 
• clay mineral /
• kinectics paleohear flux /
• diagenetic history /

Abstract: The kinetic model of clay mineral transformation and is uses are studied in this paper. The model can be applied to:(1)Determination of paleoheat flux;(2) Modeing of diagenetic his-tory;(3) Predictation of the diagenetic stages of the formation in the region without drilling wells.With the increase of burial depth and temperature, clay mineral smectite in the formations transform into illite,which leads the smectite layers (5%)in the smectite/ illite mixed layers (I/S) become fewer and fewer. The transformation of smectite to illite obeys first一order ki-netics. 5% in I/S is a function of temperature and time,and the measured 5% in I/S is a comprehensive effect of temperacare and time during geological history, So the paleoheac fluX can be determined using mcasured S% in I/S, We derermined the palnoheat flux of Well Changcan一1 in geological history using this modelra. So the diagenetic history of scraca can be modals by computing S% in IIS dung geologi-cal history. We modeled diegcnelic history of Well Tangcan一1 in Yi一Shu Graben using mea-surcd S%in I/S as well as paleocemperacure and vitrinire refleccancc R%.The isogram of S% in I/S can be made on the base of modeing the burial history and thcrmal history of all the drieng wells and ficticious weds,then the diagenctic stage of the for-mation can be predicted, We diuided the diageaecic stage of Eb₂ formarion in Tegyuan Fault-ed Basin,Yi一Shu Grabea using S% in I/S contour map and R%contour map.