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Oman Line as Related to Some of Oil Field Structures of Saudi Arabia

Reza Derakhshani
Shiraz University Iran

Godratollah Farhoudi , Ali Asghar Sharafi

All the oil fields of Saudi Arabia are of the structural type and they all lie in the northeastern part of the country, including the Saudi offshore portion of the Persian Gulf. Major Saudi Arabian oil-field structures, such as the Ghawar Anticline, show a very clear relationship to complex underlying basement uplift along the N-S Arabian Trend. Many other onshore Saudi oil fields are also underlain by fault-controlled basement uplifts. Offshore and coastal Saudi oil fields are primarily controlled by deep-seated diapirism from the Upper Proterozoic salt beds of the Hormuz Series, triggered by intersecting basement faults, as in Dammam and Abu Sa’afah, or by basement strike-slip faults, as in Kurayn, Jana and Jurayd. Although in the east and the northeast of Saudi Arabia and in the Saudi offshore portion of the Persian Gulf, different structural trends and structural types exist, they are all basement related. Taking advantage of remote sensing technology, it is detected that these structural types and trends in the eastern part of Saudi Arabia are controlled by the Oman Line, the NE trending lineament. While west of the Oman Line major growth structures with N & NE exist, there is some deviation of trends of oil and gas fields to the east of it.