沾化凹陷三合村洼陷油气多期成藏过程研究

发布时间：2018-05-29 11:23

本文选题：成藏过程 + 三合村洼陷　；参考：《中国石油大学学报(自然科学版)》2017年02期

【摘要】：利用钻井、测井以及分析化验等资料,基于沉积埋藏史和生烃史研究,结合油气来源,分析沾化凹陷三合村洼陷油气成藏过程。结果显示:三合村洼陷存在3种原油类型,油气主要来自于渤南洼陷,油气成藏经历了东营组成藏期、馆陶组成藏期和明化镇组成藏期3期成藏;东营组成藏期形成的油藏原油源于沙四上亚段成熟烃源岩,此时垦西低凸起还未成型,来自渤南洼陷的油气以断裂侧向-不整合型二元输导体系沿斜坡带运移至三合村洼陷沙三段及以下地层中成藏,并在后期由于硫化作用和生物降解作用发生稠化;馆陶组成藏期形成的油藏原油源于沙四上亚段和沙三段烃源岩,此时垦西低凸起已成型,来自渤南洼陷的油气主要以网毯模式运移至沙三段以上地层中,在后期发生生物降解作用而稠化;明化镇组成藏期形成的油藏原油源于沙三段成熟烃源岩,同样以网毯模式运移至三合村洼陷,主要在新近系成藏。
[Abstract]:Based on the research of sedimentary burial history and hydrocarbon generation history and combined with the source of oil and gas, the oil and gas accumulation process in Sanhecun sag of Zhanhua sag is analyzed by using drilling, logging and analytical test data. The results show that there are three types of crude oil in Sanhecun sag, and oil and gas mainly come from Bonan sag. The oil and gas reservoir formation period has experienced three stages: Dongying, Guantao and Minghua. The oil reservoir formed during the Dongying reservoir formation period originated from mature source rocks of the upper submember of Sha 4. At this time, the low uplift of Kengxi is not yet formed. The oil and gas from Bonan sag migrated along the slope to form reservoirs in the third member of Shahecun sag and below, and thickened in the late stage due to sulfide and biodegradation. The oil reservoir formed in Guantao reservoir period originated from the source rocks of the upper submember of Sha 4 and the source rock of the third member of Shahejie formation. At this time, the low uplift of Kanxi has been formed, and the oil and gas from Bonan sag are mainly transported to the strata above the third member of the formation by the net blanket model. In the late stage, biodegradation occurred and thickening, and the crude oil formed in Minghuazhen reservoir stage originated from mature source rock of the third member of Shahejie formation, which was also moved to Sanhecun sag in net blanket model, mainly in Neogene reservoir forming.
【作者单位】：中国石油大学地球科学与技术学院;中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(2016ZX05006-003) 中国石油化工股份有限公司科研攻关项目(P14017,P14009,P15082,P16005)
【分类号】：P618.13

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