【摘要】 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。储层沥青的显微形态各种各样。在宏观上常成均匀状、斑块状、纹展状分布，主要受控于储层的原始孔隙结构。储层沥青的成因主要有２种：一种是大然气运移引起的去沥青化作用；另一种是大气淡水引起的风化淋滤作用。风化淋滤作用形成的储层沥青主要沿断层和不整合面分布。更多还原

【Abstract】 The reservoir bitumen was formed and precipitated in the porosity of the reservoir rock from the oil by thermal cracking, weathering and deasphalting. Reservoir bitumen is not readily identified on typical log suits, and the sandstone reservoir bearing bitumen was often identified as oil-bearing reservoir. Like the cements of carbonate, quartz and clay mineral, reservoir bitumen has an important effect on the reservoir quality. It decreases the porosity and permeability and changes the porosity texture of the reservoir. The reservoir bitumen can fill in the pore space of the reservoir and even forms a barrier in the trap. The micromorphotypes of reservoir bitumen are various. In macroscopic scale, the bitumen may be distributed uniformly in the reservoir or nonuniformly, or in lamina form, and are mainly controlled by the innal porosity of the texture. The reservoir bitumen have two origin, one is deasphalting during the migration of the natural gas, another is the weathering of meteoric water. The reservoir bitumen formed by weathering are usually distributed along a fault and a uncomformity.更多还原