1.Shanghai Branch of China National offshore Oil Co.,Ltd.,Shanghai ,China;2.China University of Mining and Technology(Beijing),Beijing ,China

为查明西湖凹陷花港组物源体系并明确其对于储层的控制作用,以砂组为研究单元,通过重矿物组合、薄片观察、古水流恢复及地质统计学等多技术手段,开展不同母源类型砂体对优质储层的影响研究。研究结果表明:中央带北部T1构造主要受钓鱼岛隆褶带影响;中央反转带中北部T2-T5构造H3-H4段砂体主要来源于西北及海礁隆起,H1-H2段及H4段以下砂体来自钓鱼岛隆褶带;中央反转带南部T7-T8构造H3-H4段砂体主要来自于海礁隆起及渔山低隆起。指出了物源对储层物性的控制作用,认为变质母源的储层物性优于岩浆母源,并认为多物源盆地的母源分析应关注其非均质性,查明以段、层为单位的物源分布特征,以期对优质储层的分布及发育进行更为准确的预测。

In order to find out the controlling factor of provenance on reservoir quality of Huagang Formation in Xihu Sag, the heavy mineral assemblages, rock slice observation, restoration of Paleo-flow and geostatistics technical were used to make clear the influence of material source on high quality reservoir. Results show that the T1 structure was mainly affected by the Diaoyu Islands folding zone. The H3-H4 sand of T2-T5 in the central inversion mainly came from the northwest and Haijiao Uplift. The provenances of Member H1-H2 and the members below Member H4 came from the Diaoyu Islands. The H3-H4 sand of T7-T8 in south of the central inversion belt mainly came from the Haijiao Uplift and the Yushan Uplift. The reservoirs which were sourced from the metamorphic parent in the west have better qualities than those were sourced from the eastern part of the magma parent. Comprehensive research shows that provenance analysis of multi source basin should pay attention to the heterogeneity, finding 4～5 sequence scale source distribution, in order to provide a more accurate prediction of high quality reservoir.