论文部分内容阅读
直罗油田主力产层为三叠系延长组长2油层组，储层以三角洲分支河道砂体为主，岩性主要为长石细砂岩，大量的自生矿物对原生孔隙产生了很大程度的破坏。较强的成岩后生作用使得储层以粒间溶孔及原生粒间余孔为主要储集空间。储层孔隙结构表现为以小孔隙、小喉道为主要特征，非均质性较强。物性分布主要与其在砂体中的分布部位有关。
The main strata of Zhiluo Oilfield is Chang 2 reservoir of Triassic Yanchang Formation. The reservoirs are mainly composed of fluvial sand bodies in the delta. The lithology is mainly feldspar fine sandstone. A large amount of authigenic minerals have a great degree of primary porosity damage. The strong diagenesis makes reservoirs take the intergranular dissolved pores and primary interstitial pores as the main reservoir space. The pore structure of the reservoir is characterized by small pores and small throats with strong heterogeneity. The physical distribution is mainly related to its distribution in the sand body.