渤南一区浊积储层研究

Reservoir Character of the Turbidite Sandstone in Bonan Oil Field

渤南一区完整和不完整的鲍玛序列,为典型的低密度浊积序列。该区砂体研究表明其由浊流沟道、沟道间、席状浊积体和滑塌体等四种浊积砂体类型构成,依据砂体类型和展布特征形成三种储层结构样式:沟道型、席状浊积体型和滑塌体型。砂体平面分布差异较大,储层层间非均质性较强。夹层的分布特征表现为层间夹层具有厚度大、展布广,而层内夹层则进取度小,展布相对局限。

Reservoir rock of the study zone belongs to low-density turbidite sequence. The sand body can be summed as four kinds of turbidite sandstone which includes sheet-like turbidite sandstone, channel sandstone, inter-channel sandstone and sandstone which formed by failure are recognized. Based on the response of different sandstone in the log, after detailed correlation, facies distribution were analyzed. The reservoir can be divided into three kinds of layers, including channelized type, sheets-like type and failures, based on the facies and distribution of sandstone which formed the layer. The study of the barriers indicates that the barriers between sand sets and in the sets are very different. The barriers between the sets are thicker and more widely spread than that in the sets. And the heterogeneity study indicated that poperty between layers is very heterogeneous.