Saudi Arabia is blessed with the world's largest onshore and offshore reservoirs. Currently Saudi Aramco is aggressively pursuing production increment ventures, one of the main components being the development of stringers which are present among all the major offshore oil fields. One of the technology contributions to Saudi Aramco's effort is proactive geo-steering using Directional and Deep Resistivity technology to maximize the net sand delivered from each well.

The drilling of development wells in sand stringers involves very thin and sinuous targets. These targets are the channel sand stringers and contain a substantial amount of hydrocarbons. Optimal well placement is a requirement for these very thin reservoirs in order to drain them in a cost effective manner.

Conventional well placement has met with limited success in stringers and thus resulted in low production figures. PeriScope has persistently proven that a proactive well placement technology can be translated into maximum reservoir contact, minimum well-bore tortuosity and a facilitator for optimal production.

Due to the uncertainty that is inherently present in the distribution of the channel sands, the prediction of the azimuth of channel meander can now be confidently solidified with new deep and directional electromagnetic measurements. By detecting the upper and lower conductive shale boundaries the wells can be steered in this very challenging environment of channel sands.

In the past two years Directional and Deep resistivity technology has delivered over 110,000ft of challenging reservoir to Saudi Aramco. This has also been an enabler for multi-segment collaborations and is now seen as a premium well placement service within Saudi Arabia. This paper will highlight how these innovative technologies have impacted the stringer sand reservoir development in multiple offshore oil fields of Saudi Arabia.

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