渤东地区新近系“脊-断”耦合控藏模式与定量表征

发布时间：2018-04-09 22:29

本文选题：渤东地区　切入点：远源　出处：《成都理工大学学报(自然科学版)》2017年04期

【摘要】：利用渤东地区丰富的钻探资料,开展油气横向与垂向运移路径研究,总结远源型凸起区和斜坡带的油气运聚规律。研究表明,潜山不整合面和馆陶组底部区域砂岩是输导脊的2种通道类型。输导脊是浅层新近系油气富集的基础,它与断层耦合程度控制浅层油气运移。根据输导脊上圈闭与断层的接触方式,"脊-断"耦合关系分为接触式和非接触式,接触式进一步细分为控圈式和非控圈式。只有接触式的"脊-断"耦合关系才利于浅层油气运移,其中控圈式的接触关系浅层运移条件最优越。综合考虑输导脊规模及其与有效烃源岩的接触范围、输导脊上圈闭面积及其与有效烃源岩之间的压差等参数,构建的输导脊油气运聚系数可以较好地反映输导脊的运聚能力。油气富集层系受断层活动强度与区域盖层厚度综合控制,利用断盖比参数可以定量判断,断盖比值0.25和1分别是深层东营组、浅层明下段底部区域盖层遮挡的临界值。输导脊分布的区域是远源油气勘探的重要区带,"脊-断"耦合好的构造是浅层有利勘探目标。
[Abstract]:Based on the abundant drilling data in Bodong area, the transversal and vertical migration paths of oil and gas are studied, and the oil and gas migration and accumulation laws in remote uplift and slope zone are summarized.The results show that the unconformable surface of buried hill and the sandstone at the bottom of Guantao formation are two channel types of transport ridges.The transport ridge is the basis of hydrocarbon accumulation in the shallow Neogene, and its coupling with faults controls the shallow hydrocarbon migration.According to the contact mode between trap and fault on the transport ridge, the "ridge-fault" coupling relationship can be divided into contact type and non-contact type, and the contact type is further subdivided into the control loop type and the non-controlled ring type.Only the contact "ridge-fault" coupling relationship is propitious to shallow oil and gas migration.Considering the parameters such as the scale of the transport ridge and its contact with the effective source rock, the trap area on the transport ridge and the pressure difference between the transport ridge and the effective source rock, the oil and gas migration and accumulation coefficient of the transport ridge can reflect the migration and accumulation ability of the transport ridge.The oil-gas enriched strata are controlled by the fault activity intensity and the thickness of the regional caprock. The ratio of fault-cap ratio 0.25 and 1 is the critical value of the cover cover of the deep Dongying formation and the bottom of the lower part of the shallow layer, respectively, using the parameters of the fault-cap ratio.The distribution of the transport ridges is an important zone in the exploration of distant oil and gas, and the well-coupled structure of ridge-fault is the favorable exploration target for shallow strata.
【作者单位】：中海石油(中国)有限公司天津分公司渤海石油研究院;
【基金】：“十二五”国家科技重大专项(2011ZX05023-001,2011ZX05023-002,2011ZX05023-006)
【分类号】：P618.13

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