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在有一定的钻井资料但地震资料分辨率不高的情况下,尝试借助沉积模拟方法对澳大利亚Bonaparte盆地某研究区进行了平面沉积相编图和储层快速评价工作。根据钻井岩心、岩性、古生物年龄、古环境等资料,在研究区Elang组—Frigate组识别出了3个层序界面,确定相对海平面呈脉动上升变化;通过类比分析,认为研究区沉积为水进型三角洲河口湾体系,主物源在盆地东南方向;输入这些参数进行沉积模拟,得到了研究区岩性及沉积结构的时空展布特征,并以此指导平面沉积相图的编制。研究区具有湾内潮控、湾外浪控,高位潮控、低位浪控,近源扇三角洲与相对远源三角洲共存的复合型沉积特点。将沉积模拟方法用于储层研究,是在特定条件下进行储层快速评价的有效方法。
In the case of drilling data but not high resolution of seismic data, a sedimentary facies map and reservoir rapid evaluation of a study area in the Bonaparte Basin in Australia are tried by means of sedimentary simulation. According to the data of drilling core, lithology, paleontological age and palaeoenvironment, three sequence boundaries were identified in the Elang Formation-Frigate Group in the study area, and the relative sea level was fluctuated and ascertained. By analogy analysis, it was considered that the sedimentary area in the study area was The water enters the Delta estuarine system and the main source is in the southeast of the basin. By inputting these parameters and carrying out sedimentary simulation, the temporal and spatial distribution characteristics of lithology and sedimentary structure in the study area are obtained. The study area has the characteristics of complex sediments such as tidal flats in the bay, wave control outside the bay, high tide control, low tide control, coexistence of near-source fan delta and relatively distant source delta. The sedimentary simulation method used for reservoir research is an effective method for rapid reservoir evaluation under certain conditions.