柯克亚凝析气田西河甫组沉积相研究

Sedimentary Facies Study on Kekeya Condensate Field

以岩心资料为基础,结合测井曲线响应及粒度分析资料,对研究区进行沉积相的再判断、沉积亚相的确定及沉积微相的划分,分析各微相的主要特征及微相的平面展布特征。研究结果表明,柯克亚地区西河甫组为干旱气候条件下冲积扇相沉积。其中,X3-X5段为冲积扇扇缘亚相,X6段为冲积扇扇中亚相,X7-X8段为远扇缘亚相。并进一步划分为辫状分支河道、辫状分支河道侧翼和河道间3个微相组。

Based on the core data, the well-logging response and grain-size analysis data are combined to reconsider the sedimentary facies and parfacies of the study area. Then the microfacies are subdivided, whose main characteristics and plane distribution are further analyzed. The study results show that Xihefu formation reflects the alluvial-plain facies in arid climate. The parfacies include： X3 - X5 fan apex, X6 fan middle and X7 - X8 fan apex, which can be subdivided into three microfacies-groups： branch channel, channel flank and inter-channel. The recognition of the sedimentary th- cies of Xihefu formation establishes the powerful geological fbundation for the further development of Kekeya conden- sate field.