Abstract: The Boyabat basin is one of the important sedimentary zone in oil exploration in the Pontid belt, Presence of source,reservoir rocks, seals, oil and gas seeps at Ekinveren, Üzümlü and Uzunöz localities makes the investigated area an important oil exploration target.The Ekinveren fault is a big thrust fault, advensing from north to south and thrusting the northern sedimentary units on to the Boyabat autochthonous units. Due to these thrust movements, the pay zones of the Boyabat basin series has been stayed buried under the advancing units.During our field work, it has been observed that the thick basal Çağlayan sandstones are continious from Ekinveren to Uzunöz wherethey are overlain by Yemişliçay volcanics. Furthermore, the gas seep which has been observed at Uzunöz, withnesses presence of buriedÇağlayan reservoir sandstones and İnalü limestone under the overlaying Yemişliçay formation.As a general rule, although the volcanic activities are considered as a negative factor for oil exploration, our geologic observation indicate that the Çağlayan sandstones and İnaltı limestones could be pay zones under Yemişliçay volcanics. In summary, the Ekinveren faulthas an important role on the hydrocarbon entrapment in the studied area. The southern and northern zones of the Ekinveren fault zone andextensional area of the Çağlayan and înaltı formations under the Yemişliçay formation can be considered important exploration targets inthe Boyabat basin.