Abstarct: The Persian Gulf, as the richest hydrocarbon pool in the world, plays a very important role in the world's energy equations. Approximately two-thirds of proven oil reserves and one third of global natural gas reserves are available to the Gulf States. The research focuses on the fields of the north-west of the Persian Gulf (A, B, and C). This research is crried out to investigate the hydrocarbon potential of Kazhdumi Formation in the north-west of the Persian Gulf, by using geochemical log analysis. The results of the Rock-Eval gas chromatographiy (GC) and mass spectrometric gas chromatography (GC-MS) for this formation were used. The geochemical logs suggests that the A and C fields have a better source of hydrocarbon potential and the wells associated with the B field due to the low rock-eval geochemical parameters of rock origin, have a weak hydrocarbon potential. Additional analytical results were used to investigate the type of organic facies, kerogen, sedimentation environment, thermal maturation and effects of bio-degradation phenomena on the samples. Samples of field A are of kerogen type II and they are at the beginning of the maturity window, C fields samples are often kerogen type III that is immature and both are formed in anoxic depositional environment. To evaluate A and C fields (due to the high potential of hydrocarbon) as unconventional reservoir the spider diagram in compare to the barnet shale is usually used. The set of geochemical parameters of the Kazhdumi Formation for A and C fields have been compared with the minimum threshold values in Barnett's shale, that Kazhdumi Formation has a small amount of gas production in field A, and is located in the C field between oil and gas windows. The evaluation of the vitrinite reflection coefficient, the maturity of the samples, and the probability of the gas shale potential are investigated. The results of the TR-RO graph has represented the biogenic source of gas production in A and C fields. In deeper depth is a higher production of gas for this formation in the A and C fields.