准噶尔盆地吉木萨尔凹陷芦草沟组页岩油藏特征与形成主控因素

Characteristics and main controls of shale oil reservoirs in Lucaogou Formation, Jimsar Sag, Junggar Basin

霍进 支东明 郑孟林 唐勇 王霞田 常秋生 郭旭光 丁靖 何文军 鲍海娟 高阳

HUO Jin ZHI Dongming ZHENG Menglin TANG Yong WANG Xiatian CHANG Qiusheng GUO Xuguang DING Jing HE Wenjun BAO Haijuan GAO Yang

中国石油 新疆油田分公司, 新疆 克拉玛依 834000 中国石油 新疆油田分公司 勘探开发研究院, 新疆 克拉玛依 834000

Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China Research Institute of Petroleum Exploration and Development, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China

准噶尔盆地吉木萨尔凹陷二叠系芦草沟组发育典型的陆相咸化湖盆页岩油，综合利用地震、岩心、测井等资料，对油藏特征及形成主控因素进行了研究。芦草沟组大面积含油，以游离态和吸附态2种状态在多层“甜点”层的微—纳米孔喉、层理缝中聚集，被页岩隔层分隔，存在上、下2个“甜点”富集层段。页岩油藏地层压力、成熟度从凹陷区向斜坡区逐渐降低，原油密度逐渐增大。烃源岩品质及成熟度控制了页岩油的分布与原油性质，沉积微相控制了页岩油的分布层位，页岩的岩性与物性控制了页岩油的富集甜点，生烃增压是页岩油成藏的主要动力。

The characteristics and main controls of continental shale oil reservoirs in the Permian Lucaogou Formation in the Jimsar Sag of Junggar Basin were studied based on seismic, core and logging data. Oil was found in a large area in the Lucaogou Formation, mainly in micro and nano pore throats or bedding fractures in free or adsorbed states. There are two sweet spot layers separated by mudstones. The formation pressure and maturity of shale reservoirs gradually decrease from the sag area to the slope area, while the crude oil density gradually increases. The quality and maturity of source rocks controlled the distribution and properties of shale oil. The sedimentary microfacies controlled the distribution of shale oil. The lithology and physical properties of shale controlled the enrichment of shale oil. Hydrocarbon generation pressurization was the main driving force for shale oil accumulation.

国家科技重大专项“新疆北部深层区域构造格架、沉积演化与有利区带评价” 2017ZX05008006-003-001

https://doi.org/10.11781/sysydz202004506