西江24-1区储层隔夹层分布及演变规律研究

Distribution and Evolution Regularity of Reservoir Interlayer in Xijiang 24-1 Area

隔夹层构成的渗流屏障对地下油水运移特别是残余油的形成与散布具有较大的控制作用,隔夹层研究是提高油气采收率、最高效开发油气资源的关键因素。研究表明,西江24-1区隔夹层对剩余油分布控制作用强,其遮挡导致油田开发中后期有大量残余油分布,利用测井解释成果对影响低渗透层的主要因素进行分析,能够清晰地识别钙质、泥质和物性3类隔夹层。在一定沉积微相内,夹层具有稳定对比、随机分布的特征。

The seepage barrier formed by interlayer played a very important role in controlling the distribution of oil-water movement, especially the formation of remaining oil. The study of interlayers was the key factor to improve oil and gas recovery and develop oil and gas resources efficiently. The results show that the interlayer of Xijiang 24-1 Area has a strong effect on controlling the distribution of remaining oil, and its barrier would result in a large amount of residual oil distribution at the middle and late stages of oilfield development. Well logging interpretation results were used to analyze the major factors controlling the low permeability reservoirs, which could be deployed for clearly identifying the interlayers with calcium, muddy and physical properties.