文南油田黑油砂

东濮凹陷文南油田沙二下亚段存在黑色含油砂岩，所含黑色物质主要是重油和胶质、沥青等，成为阻碍主力油层内部流体流动的隔层，影响开发效果，造成优质储量损失。分析黑油砂分布规律及其岩性、物性、电性和有机质的组分等，认为其形成主要是由于储集层内部条件的变化，造成原油中的轻烃散失，重质组分沉淀、聚集。黑油砂具有远景开采价值。图2参8

The black oil sand in Wennan Oilfield, Dongpu Sag

Black oil sand presents in the lower section of Es_(2) in the Wennan Oilfield, Dongpu Sag, the black material composite of mainly heavy oil, resin and bitumen, etc, which is a type of interlayer preventing the fluid contained in the leading pay formation from flowing, affecting the effect of exploitation and causing the losing of some high grade reserves. The analyses of the distributing law, the lithology, the physical property, the electrical characteristic and the organic component of the black oil sand suggest that the black oil sand is formed mainly because of the change of the inside condition that make the light hydrocarbon dissipating and the depositing of heavy component and accumulating. Black oil sand has potential for explorations in future.