渤南洼陷古近系早期成藏作用再认识及其地质意义

发布时间：2018-06-08 02:17

本文选题：早期成藏 + 成藏期次　；参考：《沉积学报》2017年01期

【摘要】：传统观念认为渤南洼陷古近系具有三期成藏、晚期为主的特点。随着咸化湖盆烃源岩具有早生早排、生排烃量大的新认识的提出,利用钻井、地震及分析化验资料开展了渤南洼陷古近系早期成藏作用的重新评估。结果显示:渤南洼陷沙四上亚段发育有咸化环境下形成的烃源岩,地球化学参数表明其具有生成大量油气的能力,是早期成藏的物质基础;流体包裹体荧光颜色、均一温度共同指示出渤南洼陷罗家地区和三合村洼陷存在早期成藏,三合村洼陷古近系油气是在东营组沉积早期孤南断层断距较小时由渤南洼陷罗家地区运移而来;早期成藏作用的再认识不但使三合村洼陷古近系的油气勘探取得突破,而且构建了完整的油气成藏期次序列;早期成藏造成的岩石润湿性反转利于优势运移通道继承性发育,同时成藏过程中伴随的有机酸充注利于储集空间发育,更重要的是早期成藏作用的再次认识将会转变勘探思路、拓展勘探选区,带来了重要的地质意义和勘探启示。
[Abstract]:The traditional idea is that Paleogene in Bonan sag is characterized by three stages of reservoir formation, mainly in late stage. With the new knowledge of early generation and early discharge and large amount of hydrocarbon generation and expulsion of the source rocks in the saline lake basin, the reassessment of the early Paleogene reservoir formation in Bonan sag has been carried out by using drilling, seismic and analytical laboratory data. The results show that hydrocarbon source rocks formed in salinized environment are developed in the upper submember of Sha 4 in Bonan sag. The geochemical parameters indicate that they have the ability to generate a large amount of oil and gas, which are the material basis of early reservoir formation, and the fluorescence color of fluid inclusions, The homogenization temperature indicates that there are early reservoirs in Luojia area and Sanhecun sag in Bonan sag. The oil and gas of Paleogene in Sanhecun sag were migrated from Luojia area of Bonan sag in early sedimentary period of Dongying formation. The recognition of early reservoir formation not only made a breakthrough in oil and gas exploration in Paleogene in Sanhecun sag, but also constructed a complete sequence of hydrocarbon accumulation stages, and the inversion of rock wettability caused by early reservoir formation is conducive to the inheritance of dominant migration channels. At the same time, the organic acid filling in the process of reservoir formation is beneficial to the development of reservoir space. More importantly, the re-understanding of the early accumulation process will change exploration ideas, expand exploration areas, and bring important geological significance and exploration inspiration.
【作者单位】：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(2011ZX05006-001) 中石化股份公司科技攻关项目(P11078)~~
【分类号】：P618.13

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