Abstract: Through analysis of the oil pools in the Wuerhe formation in Section 8, the effects of sedimentary facies, formation texture, compaction and post-diagenetic changes on the physical properties and oil saturation of reservoirs with very low permeability there are discussed. It has been pointed that the distribution of oil and gas is controlled by the delta fans; the properties of the reservoirs are worsened by their composite modal textures; and compaction and post-diagenetic changes determine the zonation of authigenic minerals. The resulting reservoirs are primarily of secondary porosity with fine throats and very low permeability. Appraisal of oil potentials has been attempted and ways of exploiting this kind of oil field have been proposed.

摘要： 本文通过对八区乌尔禾组油藏的分析,探讨了这类特低渗透性储集层的物性和含油性受沉积相、储层结构、成岩压实、成岩后生变化等影响。扇三角洲——洪积扇及构造因素控制了油气分布的格局;储层的复模态结构使物性参数变差;成岩压实、后生变化使储层具有自生矿物的分带性。形成了小容量特低渗透性细喉道以次生孔隙为主的双孔隙度储集层。并用综合研究的方法,对储层进行评价,结合开发试验分析,探讨了开采这类油藏的途径。