咸化湖盆深部优质储集层形成机制与分布规律——以渤海湾盆地济阳坳陷渤南洼陷古近系沙河街组四段上亚段为例

发布时间：2018-05-31 23:17

本文选题：渤海湾盆地 + 渤南洼陷　；参考：《石油勘探与开发》2017年06期

【摘要】：以渤海湾盆地济阳坳陷渤南洼陷古近系沙河街组四段上亚段为例,基于钻井取心,开展岩心常规分析、铸体和普通薄片鉴定、扫描电镜分析以及流体包裹体测试,依据所获数据资料系统研究咸化湖盆成岩环境演化及深部优质储集层发育主控因素。该咸化湖盆储集体经历了先碱后酸、碱酸交替的成岩环境,早期碱性成岩环境下大量碳酸盐胶结物充填原生孔隙,使储集体孔隙度由初始37.30%锐减到18.77%,也使原生孔隙免于压实,保留可溶蚀空间。中后期酸性成岩环境下,早期碳酸盐胶结物溶蚀增孔10.59%,深部优质储集层得以形成。膏盐岩、烃源岩、断裂体系及沉积体展布共同控制优质储集层分布,渤南洼陷沙河街组四段上亚段深部优质储集层位于北部陡坡带,埋深为3 400~4 400 m,岩性以近岸水下扇扇端细砂岩和部分扇中细砾岩为主。
[Abstract]:Taking the upper submember of the 4th member of Shahejie formation of Paleogene in Jiyang depression, Bohai Bay Basin as an example, based on drilling coring, core routine analysis, identification of casting and ordinary thin slices, scanning electron microscope analysis and fluid inclusion testing are carried out. Based on the data obtained, the diagenetic environment evolution of the saline lake basin and the main factors controlling the development of deep high-quality reservoirs are studied. The salt lake basin reservoir experienced a diagenetic environment of first alkali followed by acid and alkali acid. In the early alkaline diagenetic environment, a large amount of carbonate cementation filled primary pores, which reduced the porosity of the reservoir from 37.30% to 18.77%, and prevented the primary porosity from compaction. Retain the erasable space. In the acid diagenetic environment in the middle and late stage, the early carbonate cementation corrosion increases the porosity 10.59, and the deep high quality reservoir can be formed. The distribution of high quality reservoirs is controlled by gypsum salt rock, source rock, fault system and sedimentary body. The deep high quality reservoir of Shahejie formation in Bonan depression is located in the northern steep slope zone. The buried depth is 3 400 ~ 4 400 m, and the lithology is dominated by subsea fan end fine sandstone and partial fan medium fine conglomerate.
【作者单位】：中国石油大学(华东)地球科学与技术学院;中国石化胜利油田分公司勘探开发研究院;
【基金】：国家科技重大专项“渤海湾盆地南部油气资源潜力再认识”(2011ZX05006-001) 中国石化股份有限公司科技攻关项目“济阳坳陷非常规与常规油气藏形成机制统一性与分布相关性研究”(P16005)
【分类号】：P618.13

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