成都理工大学学报（自然科学版）2012，Vol.39Issue(2)：130-136,7.
西湖凹陷某构造花港组沉积相及致密砂岩储层特征
Sedimentary facies and the characteristics of tight sandstone reservoirs of Huagang Formation in Xihu depression,East China Sea Basin
摘要
Abstract
The study area in the Xihu depression located in the southwest of East China Sea Basin is one of the key tectonic regions of the present offshore exploration and exploitation targets, with Huagang Formation (Oligocene) as its major gas layer. On the basis of the former research, by means of the reservoir pore space, the reservoir physical properties of the tight sandstone rcservoir of Huagang Formation in this structure and its main controlling factors affecting the reservoir Huagang Formation of the study area. The delta front and delta plain develop in its upper and lower sections, respectively, presenting a regressive sedimentary cycle with the rising of the lake level from bottom to top. The reservoir rocks consist of three main types, that is, the feldspathic litharenite, the lithic arkose and the quartzose arkose. The grain size of the rock is small or medium, the maturity of the skeleton components is low, the secondary pores are the main reservoir spaces, and the fissures are undeveloped. These reservoir rocks have poor reservoir physical properties, belonging to the typical tight sandstone reservoirs and the upper and lower sections differ greatly in their physical properties. The sedimentary environment is the essential factor leading to the densification of the Huagang Formation reservoir, while compaction is the main controlling factor of the tight sandstone reservoir of Huagang Formation. The leading factors of reservoir densification include high matrix content and large extent ot carbonate cementation, whereas dissolution plays a constructive role in the development of the relatively high-quality sections of the tight sandstone reservoir.关键词
东海盆地/花港组/致密砂岩/沉积相/储层特征Key words
East China Sea Basin/ Huagang Formation/ tight sandstone/ sedimentary facies/ reservoir chiaracteristics分类
能源科技引用本文复制引用
刘金水,曹冰,徐志星,秦兰芝,徐昉昊,唐健程..西湖凹陷某构造花港组沉积相及致密砂岩储层特征[J].成都理工大学学报（自然科学版）,2012,39(2):130-136,7.基金项目
国家科技重大专项(2011ZX05023-001) （2011ZX05023-001）
