东营凹陷辛东地区层序地层格架与油气藏预测研究

IOCAS-IR > 海洋环流与波动重点实验室

	东营凹陷辛东地区层序地层格架与油气藏预测研究
其他题名	Sequence Stratigraphy Framework and Oil & Gas Reservoir Prediction In Xindong Areas, The Dongying Depression
	韩清华
学位类型	博士
	2009-01-13
学位授予单位	中国科学院海洋研究所
学位授予地点	海洋研究所
关键词	东营凹陷辛东地区层序地层格架储层评价成藏模式油气藏预测
摘要	本文以东营凹陷辛东地区古近纪及新近纪地层为研究目标，通过层序地层划分、沉积相分析、储层评价和油藏特征及成藏模式研究，综合评价了油气藏，并进行了有利勘探目标预测。在辛东地区首次通过层序地层学原理划分4个二级层序、7个三级层序，为储层和圈闭预测建立的等时层序地层格架；岩石类型主要包括砂岩、灰岩、泥岩和页岩等，以砂岩和泥岩为主。通过岩心观察、测井曲线分析、单井沉积相研究，结合剖面地震相和剖面沉积相分析表明，研究区发育三角洲、滨浅湖、半深湖-深湖相、湖底扇等沉积类型，形成浊积扇体-前三角洲-三角洲前缘-三角洲平原-河流相-浅湖亚相纵向演化序列，包括了含砾砂岩、中粗砂岩、细砂岩及粉砂岩储层；储层以次生孔隙为主，存在1600 ~ 2200m和2600 ~ 3200m次生孔隙带，为碳酸盐胶结物和长石与部分岩屑的溶蚀作用和粘土矿物脱水作用所致，在断裂活动、有效烃源岩成熟度范围的中细砂岩内最发育；较好的渗透层主要分布在东营组、沙二段和沙三上亚段。研究区发育断层、岩性、断层-岩性等类型油气藏，主要形成于① 古近纪末东营期的生油层系内及邻近地区，以原生岩性油气藏为主；② 新近纪至第四纪沉积时期，其中新近纪明化镇和第四纪沉积时期，成为油气运聚的重要时期。成藏动力学系统呈现下部自源原生封闭型、中部它源原生半封闭型及上部它源次生开放型三种典型特征。通过对成藏主控因素和油气分布规律的综合认识，在本区优选出3个有利勘探区域：① 沙三中下及沙四段浊积砂体，在构造翼部地区发育岩性油藏；② 沙二段和沙三上砂体，孔渗条件好，断层封堵性控制油藏；③ 馆陶-明化镇组浅层次生油藏，油气沿着断层、砂体不断地从翼部的深层向核部的浅层运聚形成油藏。
其他摘要	Paleogene and neogene formations are researched in Xindong areas, Dongying depression. Through stratigraphy division, sedimentary facies analysis, reservoir evaluation, and reservoir characteristic & accumulation model analysis, oil-gas reservoirs are researched, and favorable exploration targets are predicted. Firstly division four second-order sequences and seven third-order sequences, isochronous stratigraphic framework for the forecasting of reservoir & trap. Rock types include sandstone, limestone, mudstone, and shale. Sand and mudstone are chiefly rock. By core observation, logging curve analysis, individual well sedimentary facies analysis, facies analysis and seismic facies in the profile, it is known that sedimentary environments include delta, shore-shallow lacustrine, deep and semi-deep lake facies, sub-lacustrine fan. Vertical evolution series are from turbidite fan to pro-delta, delta front, delta plain, fluvial facies, and shallow-lake facies. Sandstones comprise pebbled sandstone, moderate coarse sandstone, fine sandstone, and siltstone. Reservoir porosity type is mainly secondary porosity, because carbonate cements, feldspan and fractional cuttings dissolution, and clay minerals dehydration in 1600-2200m & 2600-3200m belts. Secondary porosity broadly distributes middle-fine sandstone which is controlled by fault activities and effective source rocks maturity. Permeability formations chiefly distribute Dongying member, Sha-2 member and Sha-3 upper segment. Hydrocarbon reservoir types contain fault, lithologic, fault-lithologic traps. Reservoirs are two period formations. The first is the primary hydrocarbon reservoir in oil source bed of Dongying period in Paleogene. The second is the formation from Neogene to Quaternary, and Minghuazhen period and Quaternary are mainly oil-gas migration-accumulation. The reservoir-formed dynamic system could be divided into lower self-source enclosed take, middle allo-source to self-source semi-full enclosed type and upper allo-source semi-open enclosed one. By integrating main controlling factors and oil-gas distribution, three favorable exploration targets are predicted. First is the turbidite of Sha-4 member and Sha-3 middle segment, and is lithologic trap in the flank of structure. Second is the sandstone of Sha-3 upper segment and Sha-2 member. It is porosity and permeability formation, and fault sealing controls hydrocarbon accumulation. Final is the shallow secondary hydrocarbon accumulations in the formation from Guantao member to Minghuazhen member, because oil & gas persistent migrating through fault and sand-body from flank to center, from deep to shallow in one structure.
页数	113
语种	中文
文献类型	学位论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/937
专题	海洋环流与波动重点实验室
推荐引用方式 GB/T 7714	韩清华. 东营凹陷辛东地区层序地层格架与油气藏预测研究[D]. 海洋研究所. 中国科学院海洋研究所,2009.

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