福山凹陷流一段油气成藏条件研究

发布时间：2018-01-01 17:19

本文关键词：福山凹陷流一段油气成藏条件研究　出处：《东北石油大学》2016年硕士论文　论文类型：学位论文

【摘要】：福山凹陷流一段作为探区重要的产油层,其地位近些年来越来越重要。随着近些年的油气勘探的不断深入,流一段油藏表现出了相当的复杂多样性,至今仍未查明流一段的油气资源状况。因此流一段成藏条件的深入研究对该层系的资源潜力评价和指导油气勘探都具有重大的现实意义,因此开展福山凹陷流一段成藏条件研究,预测有利勘探区带是设立本次课题的主要目的。本项目的研究以地震、录井、测井和重磁力为资料基础,以沉积学、层序地层学、石油地质学等为理论指导,利用构造演化分析技术、古地形恢复技术、构造精细解释技术、地震属性提取分析技术、井震联合储层预测技术、地层岩性圈闭识别与描述技术、油藏分析评价技术等关键技术手段,主要开展了福山凹陷构造结构、断裂展布和构造演化特征研究;研究流一段地层展布范围,恢复古地貌和沉积环境,分析沉积模式与不同沉积相带的变化规律,明确有利储层发育带;开展油气成藏条件研究,分析烃源岩、储层、盖层、储盖组合特征,明确油气运、聚、保时空匹配规律;开展油气成藏主控因素与成藏模式研究,明确不同区带油气藏类型,预测有利油气聚集区带,指导油气勘探部署。本文通过对凹陷进行区域构造地质研究,明确了凹陷中发育上下两套断裂体系和双层结构,整体具有“南北分区、东西分带”的构造格局。通过古沉积背景与沉积环境研究,明确了凹陷发育东西两个次凹,沉积中心逐渐向北东方向迁移;流二段暗色泥岩厚度大、演化成熟度高是凹陷的主要烃源岩。通过开展流一段的成藏条件分析,明确了流一段发育四个物源方向、7个主要沉积体系,南侧物源的辫状河三角洲沉积体系分布范围广、持续发育,东西两侧物源主要发育短轴扇三角洲沉积,砂岩为主要储层。目前流一段油气多发现于深大断层的两侧,下覆流二段为主要油气的来源,沟通油源的断层是控制油气整体分布的主控因素,同时岩性及储层物性的变化影响了油气的横纵向展布特征。凹陷发育两大油气成藏期,与流一段圈闭定型期等各种成藏条件匹配良好。综合成藏条件分析表明流一段构造与储层匹配形成多个大型构造、岩性圈闭带,可以形成构造断块、岩性上倾尖灭、岩性-构造、砂岩透镜体和低孔渗五种油藏模式。最终认为流一段具有良好的成藏条件和资源潜力,提出了朝阳、花场和永安区带可作为有利区带进行进一步的油气勘探。
[Abstract]:Fushan sag is an important oil-producing reservoir in the exploration area, its status has become more and more important in recent years. With the development of oil and gas exploration in recent years, the reservoir of Fushan section shows quite complex diversity. So it is of great practical significance to study the reservoir forming conditions for the evaluation of resource potential of this formation and to guide oil and gas exploration. Therefore, the main purpose of this project is to study the reservoir forming conditions and predict favorable exploration zones in Fushan Sag. The research of this project is based on seismology, logging, logging and gravity and magnetic force, and based on sedimentology. Sequence stratigraphy, petroleum geology and so on are used as theoretical guidance, using structural evolution analysis technology, paleotopographic recovery technology, structural fine interpretation technology, seismic attribute extraction and analysis technology, well and earthquake combined reservoir prediction technology. The identification and description technology of stratigraphic lithologic traps, reservoir analysis and evaluation technology and other key technical means, mainly carried out structural structure, fault distribution and structural evolution characteristics of the Fushan sag. The stratigraphic distribution of the first member of the flow is studied, the paleogeomorphology and sedimentary environment are restored, the variation of sedimentary model and different sedimentary facies is analyzed, and the favorable reservoir development zone is defined. The characteristics of hydrocarbon source rock, reservoir, caprock and reservoir caprock assemblage are analyzed, and the laws of hydrocarbon migration, accumulation and space-time matching are defined. The main factors and models of oil and gas accumulation are studied, the types of oil and gas reservoirs in different zones are defined, the favorable zones of oil and gas accumulation are predicted, and the exploration and deployment of oil and gas are guided. In this paper, the regional structural geology of the sag is studied. It is clear that there are two sets of fault system and double layer structure developed in the sag, the whole has the structure pattern of "north and south division, east and west zonation". The paleo-sedimentary background and sedimentary environment are studied. It is clear that there are two subcones developed in the sag, and the sedimentary center is gradually moving to the north and east direction. The dark mudstone is the main source rock in the sag with high evolution maturity. Through the analysis of the reservoir forming conditions of the first member, four source directions and seven main sedimentary systems have been identified. The braided river delta sedimentary system of the southern provenance has a wide range of distribution and continues to develop, while the source on both sides of the east and west are mainly developed by the short axial fan delta deposition. The sandstone is the main reservoir. At present, the oil and gas of the first section of flow is found on both sides of the deep fault, the second stage of the overlying flow is the main source of oil and gas, and the fault of communicating the oil source is the main controlling factor to control the whole distribution of oil and gas. At the same time, the changes of lithology and reservoir physical properties affect the horizontal and vertical distribution characteristics of oil and gas. Two major oil and gas accumulation periods are developed in the sag. The comprehensive analysis of the reservoir forming conditions shows that the fluid-first member structure matches with the reservoir to form several large structures and lithologic trap zones, which can form structural fault blocks. Lithologic updip pinning lithology structure sandstone lens and low porosity and permeability are five reservoir models. Finally it is considered that the flow first member has good reservoir forming conditions and resource potential and the Chaoyang is put forward. Huachang and Yongan belt can be used as favorable zones for further oil and gas exploration.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：P618.13

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