印尼C油田储层层序地层分析与沉积相研究

C油田位于印尼Java海西北部Sunda盆地。运用高分辨率层序地层学方法对C油田储层(T组碎屑岩)进行了精细研究。C油田储层可以划分为4个中期基准面旋回(S1—S4)、30个短期基准面旋回。S1和S2旋回主要为辫状河沉积;S3旋回早期以曲流河沉积为主;S3旋回晚期—S4旋回以三角洲沉积为主。S1—S4沉积时期,沉积环境从陆相河流环境逐渐过渡到海陆过渡相三角洲环境,为一水体推进过程。

Sequence stratigraphy and sedimentary facies of reservoir in C oilfield, Indonesia

The C oilfield is located in Sunda basin,the northwestern Java sea,Indonesia.Its reservoir(the clastic rocks of T Formation) was carefully studied by using high-resolution methods of sequence stratigraphy.The reservoir can be divided into 4 medium-term base level cycles(S1-S4) and 30 short-term base level cycles.The S1 and S2 cycles are mainly composed of braided river facies,the early S3 cycle of meandering river facies and the late S3 and S4 cycles of delta facies.From S1 to S4,the sedimentary environment changes from terrestrial fluvial facies to transitional delta facies,resulting in a process of gradual transgression.