涠洲油田涠三段沉积特征分析

针对涠洲油田钻井资料少的问题,此文从前期研究成果和文献调研出发,确定涠洲油田涠三段物源区和主要沉积环境;其次,通过油田已钻4口井的最新井、震资料,涠三段划分出了辫状河三角洲平原、前缘两个亚相及相应的7个微相;最后,结合物源方向及波阻抗属性刻画出该区涠三段四套砂体的纵、横向展布特征,为下步地质研究奠定基础。

Sedimentary Characteristics in the 3rd Member of Weizhou Formation in Weizhou Oilfield

In view of the lack of well data in Weizhou oilfield, this paper starts from the previous results and literature investigations to determine the provenance area and main sedimentary environment in the 3rd Member of Weizhou Formation. Secondly, through the latest well and seismic data of 4 wells drilled in oilfield area, two sub facies of braided river delta plain, braided river delta front and corresponding 7 sedimentary microfacies are divided. Finally, on the basis of the direction of the source, combined with the wave impedance attribute extraction, the vertical and horizontal distribution characteristics of the four sets in the 3rd Member of Weizhou Formation can also be depicted. It will lay a foundation for further geological research.