东海丽水凹陷物源及其对储层物性影响

发布时间：2018-10-29 14:05

【摘要】：为确定东海陆架盆地丽水凹陷物源并寻找有利储层发育区,通过碎屑锆石U-Pb定年分析丽水凹陷东、西次洼的物源及源区性质,在此基础上探讨不同物源对砂岩储层物性的影响。经分析,丽水西次洼物源主要来自凹陷西部的闽浙隆起区,以火山岩为主,含少量侵入岩及变质岩;该物源形成的砂岩塑性物质含量较高、岩石抗压性相对较弱,由压实作用造成的孔隙损失量相对较大。丽水东次洼物源主要来自凹陷东部的渔山隆起区,以沉积岩、侵入岩为主要物源;该物源形成的砂岩塑性物质含量较低、岩石抗压性较强,由压实作用造成的孔隙损失量相对较小。研究表明,物源差异对储层物性有较大的影响。
[Abstract]:In order to determine the provenance of Lishui sag in the East China Sea shelf basin and to find the favorable reservoir development area, the provenance and source characteristics of the east and west subsag of Lishui sag were analyzed by U-Pb dating of clastic zircon. On this basis, the effects of different provenances on the physical properties of sandstone reservoirs are discussed. According to the analysis, the source of the west subsag in Lishui mainly comes from the Fujian and Zhejiang uplift areas in the western part of the depression, with volcanic rocks as the main source, and a small amount of intrusive rocks and metamorphic rocks. The sandstone formed by this material source has a high content of plastic material, relatively weak compressive resistance of rocks, and a relatively large amount of pore loss caused by compaction. The provenance of Dongzi depression in Lishui mainly comes from the Yushan uplift in the eastern part of the sag with sedimentary rocks and intrusive rocks as the main provenance. The sandstone formed by this material source has low content of plastic material, strong compressive resistance of rock, and the pore loss caused by compaction is relatively small. The results show that the material source difference has a great influence on reservoir physical properties.
【作者单位】：同济大学海洋地质国家重点实验室;中海石油(中国)有限公司上海分公司;中国海洋石油总公司;
【基金】：国家科技重大专项(2011ZX05023-003)
【分类号】：P618.13

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