鄂尔多斯盆地中部长8成藏主控因素

发布时间：2018-03-06 06:01

本文选题：鄂尔多斯盆地　切入点：长致密油　出处：《西安科技大学学报》2017年03期 　论文类型：期刊论文

【摘要】：鄂尔多斯盆地陇东地区和新安边地区成功实施了致密油勘探与开发,提交探明石油地质储量近亿吨。近年来在盆地中部和南部地区致密油勘探也取得了重要进展,但成藏条件研究程度依然较低。从长8致密油分布特征、烃源岩特征、沉积储层、源-储配置关系及运移动力等方面,对鄂尔多斯盆地中部长8致密油成藏主控因素进行了探讨。研究认为长8致密油成藏受控于以下地质因素:(1)优质烃源岩不仅提供了充足的油源,而且还是运移充注动力来源,其分布控制致密油的成藏位置和规模;(2)大面积发育的三角洲前缘水下分流河道复合砂体是长8致密油聚集的主要储集场所,广泛致密背景上的局部"甜点"有利于石油的富集与高产;(3)长7、长9优质烃源岩与长8段优质储层空间配置关系控制了长8致密油的形成与富集。
[Abstract]:Dense oil exploration and development have been successfully carried out in Longdong and Xinanbian areas of Ordos Basin, and close to 100 million tons of proven petroleum geological reserves have been submitted. In recent years, important progress has also been made in the exploration of dense oil in the central and southern regions of the basin. However, the study of reservoir forming conditions is still relatively low, from the distribution characteristics of Chang 8 dense oil, source rock characteristics, sedimentary reservoir, source-reservoir configuration relationship and migration dynamics, etc. In this paper, the main factors controlling the formation of tight oil reservoir of Minister 8 in Ordos Basin are discussed. It is considered that the reservoir formation of Chang 8 tight oil is controlled by the following geological factors: 1) High quality source rocks not only provide sufficient oil sources, but also provide a source of migration and filling power. Its distribution controls the location and scale of dense oil accumulation. (2) the complex sand body of delta front underwater distributary channel is the main reservoir of Chang 8 dense oil accumulation. The local "desserts" on the broad dense background are favorable to the enrichment of oil and the high yield of oil, Chang7. The spatial relationship between the source rock of Chang 9 and the high quality reservoir of Chang 8 controls the formation and enrichment of the tight oil of Chang 8.
【作者单位】：陕西延长石油(集团)有限责任公司研究院;
【基金】：国家自然科学基金(41102083)
【分类号】：P618.13

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