Smectite-illitization difference of source rocks developed in saline and fresh water environments and its influence on hydrocarbon generation: A study from the Shahejie Formation, Dongying Depression, China
Illitization could result in the desorbing and discharging of interlayer OM. The discharged interlayer OM finally contributed to hydrocarbon accumulation. Illitization discrepancy is one major cause for hydrocarbon generation differences.