柴达木盆地地震相模式

SEISMIC FACIES MODELS OF THE QAIDAM BASIN

王明儒

Wang Mingru

青海石油管理局勘探开发研究院, 敦煌 736202

Research Institute of Petroleum Exploration and Development, Qinghai Bureau of Petroleum Administration

本文根据水下地形地貌建立了柴达木盆地陡崖区、斜坡区、湖凹中心区地震相模式。前两区普遍发育三角洲、冲积扇、水下扇、河道砂体、河口砂坝、砂层等,是油气的储集体;后一区则主要发育泥质生油岩。在此基础上,作者绘制柴达木盆地早、中、晚、末四个阶段的地震相平面展布模式图,展示了盆地沉积演化过程中不同时期储集岩、生油岩的分布规律,为油气勘探部署提供依据。

Seismic facies models are established for the areas of klint,slope and lake centre in the Qaidam Basin based on their subaqueous topography and morphology,the former two prevailed by the sediments of dalta,alluvial fan,subaqueous fan,channel sand body,river mouth bar and sand bodies,are favourable hydrocarbon reservoirs,while argillaceous source rocks are predominantly developed in the latter. On the basis mentioned above,the author has established the distributive models for the seismic facies of four stages(early,middle,late and end)in the Qaidam Basin,illustrating the distribution patterns of reservoirs and source rocks during various stages of the basin evolution,and it provides scientific basis for the planning of petroleum exploration in the basin.

https://doi.org/10.11781/sysydz199303225