【摘要】 川中地区泛开江-梁平海槽对飞仙关组沉积相的演化和鲕滩储层的分布有着明显的控制作用。鲕滩储层的发育与沉积前的古地貌密切相关,台缘高能鲕粒滩储层是飞仙组关最重要的储层,寻找有利的古地貌和高能鲕滩储层的关键是准确识别海槽边缘和飞仙关组晚期高位域的沉积特征。仅利用钻井资料与测井资料划分沉积相带,结果不准确。为此充分利用地震资料的横向连续性,采用地震相分析技术,选取关键的地震属性,利用层拉平技术,准确识别海槽边缘,划分沉积相带,寻找有利于鲕滩储层发育的台缘带。利用地震层序分析技术,纵向上分析沉积相演化过程,识别有利于鲕滩储层发育的高能沉积环境。采用地震相分析技术与地震层序分析技术相结合的方法,从空间上直观地了解不同时期古地貌的变迁情况,从区域上识别高能鲕滩储层发育的层段及所处的古地貌位置。近年来的鲕滩勘探成果表明,该方法能提高鲕滩储层的钻探成功率。更多还原

【Abstract】 Fankaijiang-Liangping trough has obvious controlling effect on the evolution of sedimentary facies of Feixianguan Formation and the distribution of oolitic-beach reservoirs.The development of oolitic-beach reservoir in platform margin is closely related with the paleo-geomorphology before deposit.High-energy oolitic-beach reservoir is the most important one of Feixianguan Formation.The key for seeking favorable paleo-geomorphology and high-energy ooliticbeach reservoir is to accurately identify the margin of trough and the depositional characteristics of highstand system tract at the late stage of Feixianguan Formation.The classification of sedimentary facies is not accurate only by using drilling and logging data.Therefore, by the full use of the lateral continuity of seismic data,the seismic facies analysis technique was used to select key seismic attributes; then layer flattening technique was applied to accurately recognize the margin of trough and classify sedimentary facies;finally the platform margin belt beneficial for developing ooliticbeach reservoirs was identified.Meanwhile,the seismic sequence analysis technique was used to analyze the sedimentary facies evolution in longitudinal direction and the high-energy sedimentary environment beneficial for developing oolitic-beach reservoirs.The combination of seismic facies analysis technique and seismic sequence analysis technique can visually understand the change of paleo-geomorphology in different period,and recognize the regional ooliticbeach reservoir development interval and its paleo-geomorphology. The exploration achievements of oolitic-beach area in recent years indicate that the method can improve the successful ratio of drilling oolitic-beach reservoir.更多还原