Block 5A, South Sudan, Oil exploration block in Unity, South Sudan
Block 5A is an oil production zone in Unity State, South Sudan, covering a large floodplain with several oil fields across it. The Tharjiath field is the best known of these and sits above one of the main petroleum deposits in the area.
Oil development in the area started in the 1990s during the Second Sudanese Civil War, when armed groups fought over control of the resources. The conflict left a deep mark on how operations in the zone were established.
The Nuer people who live in this region are cattle herders who move their animals between grazing areas depending on where water can be found. This seasonal rhythm shapes how communities across the area organize daily life.
The floodplain floods seasonally, which limits when and how the area can be reached, so checking local conditions before any trip is essential. Infrastructure in the zone is basic, and travelers should be prepared for rough terrain and limited services.
Roads built to support oil extraction have changed the way water drains across the Nile wetlands, redirecting natural flow in ways that were not planned. This shift can be seen by comparing satellite images of the area taken years apart.
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