Close to Mountain Front Fault in Dezful Embayment

Understanding geometry of fold in oil field has an important role in oil recovery and production. Therefore، the geometry of Parsi Anticline in the north Dezful Embayment has been selected as a subject for present study، which is carried out by using interoperated 3D seismic data and lateral cross-section on top of the Asmari Limestone structural contour map. Based on Isogone and Ramsay classification، the competent carbonate layers of Asmari، Ilam and Sarvak formations are classified as 1B class and incompetent layer of Pabdeh and Gurpi Formations as 1A or 1C classes. Such a folding model is found only in south and north culminations of anticline. In the middle part of Parsi Oil Field، the fold geometrical configuration is box type، which is related to the axial fold rotation that shows different geometry. Parsi Oil Field is a fault related structure which is based on Ramsay and McClay and Poblet classification، it is considered as progressive fault related type 3 (variable limb dip and length). In general، the thrust faults generating these types of folds are sourced from incompetent layers which in Parsi Oil F ield could be in relation to the Dashtak Formation Evaporates.