The reservoir bitumen was formed and precipitated in the porosity of the reservoir rock from the oil by thermal cracking, weathering and deasphalting. 储层沥青对储层的储集性能有重要影响,它可以大大降低储层的孔隙度和渗透率,改变储层的孔隙结构,甚至可以完全堵塞孔隙,形成圈闭的遮挡层。
In Ancient Egypt,when a poor person died,his body was merely enclosed in a thick layer of bitumen to keep out the air. 在古埃及,穷人死后,他的躯体仅用厚厚的一层沥青包起来以隔绝空气。