涠西南凹陷(西部)古近系层序地层及沉积特征研究

Paleogene stratigraphic sequence and sedimentary feature in the west of Weixinan Depression

席敏红 余学兵 黄建军

Xi Minhong Yu Xuebing Huang Jianjun

中国石油化工股份有限公司上海海洋油气分公司研究院, 上海 200120

Institute of SINOPEC Shanghai Offshore Oil & Gas Company, Shanghai 200120

在不同勘探阶段,运用层序地层学理论进行层序地层的沉积特征研究是当前石油行业各生产单位常用的工作方法。在勘探初期钻井稀少的情况下,充分利用钻井和地震资料,采用井-震结合进行三级层序沉积特征研究的思路和方法,探讨了涠西南凹陷(西部)古近系层序地层。通过钻井资料分析,进行单井及多井层序地层及沉积旋回解释。井震结合,进行地震剖面的地震地层学解释,建立层序地层格架并进行地震相及沉积相分析。结合构造背景和古地貌研究,在层序地层格架内进行研究区沉积相及沉积体系平面特征及沉积演化过程的分析和预测。

At hydrocarbon exploration stage, using the theory of sequence stratigraphy to study sedimentary feature is a common method at present. At the initial stages of exploration with few exploratory wells, usu-ally use the drilling and seismic data and combine them to study tertiary sequence's sedimentary features. Through the analysis of the drilling data, explain stratigraphic sequence and sedimentary cycle in single well and multiwells. Combining the drilling and seismic data, explain seismic strata on seismic profile, establish stratigraphic sequence frame and analyse seismic facies and sedimentary facies. Combining the analysis of structural setting and palaeotopography, analyse and predict the plane characteristic of sedimentary faceis and sedimentary system and the process of sedimentary evolution on research area.