鄂尔多斯盆地樊学南油区长8储层沉积相研究

Study on Chang-8 Reservoir s Sedimentary Facies in Fanxuenan Oilfield of Ordos Basin

由研究区长8油层组的沉积环境、沉积微相的单井相、电测资料等表明:延长组长8的沉积相为三角洲前缘亚相沉积;沉积微相细分为:水下分流河道、决口扇、天然堤、河口坝以及分流间湾等。受控于沉积微相的影响,研究区长8储层沉积微相下分流河道砂体、河口坝为油气聚集提供了有利空间。

The sedimentary environment,single well facies and electrical logging data of Chang-8 oil layer in the study area shows that the sedimentary facies of Chang-8 in extension group is delta front subfacies.The sedimentary microfacies are subdivided into underwater distributary channel,crevasse fan,natural dike,estuary bar and distributary Bay.Controlled by the sedimentary microfacies,the distributary channel sand body and estuary bar under the sedimentary microfacies of Chang-8 reservoir in the study area provide favorable space for oil and gas accumulation.