东海某气田FHT构造PH下层系沉积相研究

Study on Sedimentary Facies of Lower Member of PH Formation of FHT Structure in One Gas Field of the East China Sea

张存才

ZHANG Cuncai

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, China

在对西湖凹陷FHT构造岩心、钻井及分析化验资料综合研究的基础上,运用层序地层学、沉积学和测井地质学原理,通过大量的基础研究,克服了海上井少、资料不全的困难,识别了西湖凹陷PH组下层系沉积环境、沉积特征。经过分析研究,认为PH组下层系P8、P9、P10、P11沉积环境为半封闭海湾中的泻湖潮坪沉积。在平面上,预测了砂体的平面展布特征,分析了其在平面上的演化规律。纵向上,从P11到P8层,砂体逐渐向凹陷的西南扩展,规模也有所扩大,总体上反映为海进的沉积特征。

Based on the integrated study results on cores, drilling and geochemical data from FHT structure in Xihu depression, the sedimentary environments of the Lower Member of PH Formation have been identified through large amount of basic researches on sequence stratigraphic, sedimentology and logging geology, although lacking of borehole and other data. It is believed through study that the sand bodies in P8, P9, P10 and P11 layers in the Lower Member of PH Formation are lagoon tidal flat deposits deposited under semi-enclosed embayment environment. In addition, the planar distribution characteristic of sand bodies has been forecasted, and the evolution of sand bodies has been analyzed. In vertical view, from P11 to P8 layers, the sand bodies expanded southeastward, increasing in scale, showing the transgressive sedimentary features in general.

https://doi.org/10.3969/j.issn.1008-2336.2013.01.013