Abstract：A series of diagenetic reaction will occur after hydrocarbon-bearing fluid,which is rich in organic acids,entered the reservoir from source rock. The study indicates that six diagenetic phenomena were closely related to hydrocarbon activities,namely dissolution of acidic hydrocarbon fluid,montmorillonite dehydration and illitization,iron ion impregnation of carbonate mineral,track of asphalt and iron-concretion,the formation of authigenic kaolinite and water consumption,bottom interlayer distribution of carbonate cementation layer. These special diagenetic phenomena were characteristic identification signals in petroleum-bearing basin which indicate the degree of first invasion,the direction and trajectory of hydrocarbon migration,and the industrial concentration. Those have great reference value for finally confirming the accumulation place. Based on the hydrocarbon-traced diagenetic minerals in petroleum-bearing basin,a clastic diagenetic evolution pattern was established. The evolution pattern can guide the exploration of complicated reservoirs in Shengli oil-field,and can also provide reference for determining the effectiveness of reservoirs in the future.
Zhang Shou-Peng,Li Bo. Diagenesis and evolution characteristics of hydrocarbon-traced minerals in Dongying sag, Bohai Bay Basin[J]. JOPC, 2018, 20(6): 1043-1052.
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