兴城地区营一段火山岩储层孔隙特征及演化研究

发布时间：2018-12-12 00:10

【摘要】：随着勘探理论及其技术的不断完善,火山岩油气藏相继在世界各大盆地相继已被发现。目前,在火山岩油气藏勘探与开发方面已获得很大突破,火山岩储集层的研究已经成为近些年来国内外油气勘探的一个新领域。火山岩储层复杂而特殊,存在诸多问题需要强化与探索,火山岩储层孔隙特征与演化研究对突破火山岩储层基础地质的新进展以及火山岩油气藏的潜在勘探开发有着举足轻重的意义。本文在详细的火山岩岩石学研究的基础上,准确识别并定量评价不同类型岩石中各种主要的孔隙类型,以及不同类型岩石中主要孔隙组合,识别并建立孔隙形成演化序列。运用流体-岩石相互作用、物理作用及质量平衡原理、相平衡及热力学理论和方法对火山岩的脱玻化孔及溶蚀孔隙进行研究;详细研究火山岩次生矿物的类型及分布、主要次生孔隙的形成和演化机制,建立火山岩储层演化模式,进而探讨储层分布规律。综合研究取得如下结论及认识:1.研究区火山岩类型繁多,与岩浆成分、温度、性质、喷发作用有着直接的关联,同种岩浆因喷发作用方式不同,可形成不同类型的岩石,本区8 口钻井岩石化学成分析资料表明,火山岩以酸性喷发岩为主,其次为中性喷发岩。2.研究区火山岩有17种主要次生矿物,次生矿物的种类与岩石类型有关,不同的岩石类型有不同的次生矿物组合,同一地区不同岩石类型次生矿物组合不同。3.按相带统计兴城地区36 口井的营一段107个层有效储层有效厚度数据看出,有效储层以爆发相为主,其次为溢流相。4研究区火山岩最基本的孔隙类型主要有原生孔隙、次生孔隙、裂缝3大类。原生孔隙主要为气孔、粒间收缩孔缝,次生孔隙主要有脱玻化孔和溶蚀孔,裂缝有裂缝和微裂缝2类。火山灰溶蚀孔、砾间砾内孔等孔隙类型可由上述最基本的孔隙组合而成,各种孔隙在储层中起着重要作用。5.识别并建立了孔隙形成演化顺序,以地质事件和岩石学证据为基础讨论了孔隙的演化,确定了孔隙发育规律,提出了孔隙演化的6个阶段,并建立了孔隙演化模式。
[Abstract]:With the development of exploration theory and technology, volcanic oil and gas reservoirs have been discovered one after another in various basins around the world. At present, great breakthroughs have been made in the exploration and development of volcanic oil and gas reservoirs, and the study of volcanic reservoirs has become a new field of oil and gas exploration at home and abroad in recent years. Volcanic reservoirs are complex and special, and there are many problems that need to be strengthened and explored. The study on pore characteristics and evolution of volcanic reservoir is of great significance to break through the new progress of basic geology of volcanic reservoir and potential exploration and development of volcanic reservoir. On the basis of detailed petrological study of volcanic rocks, this paper accurately identifies and quantitatively evaluates various major pore types in different types of rocks, as well as major pore assemblages in different types of rocks, and identifies and establishes a series of pore formation and evolution. Based on the principles of fluid-rock interaction, physical action and mass equilibrium, phase equilibrium and thermodynamics theory and method, the debonding pore and dissolution pore of volcanic rock are studied. The types and distribution of secondary minerals of volcanic rocks and the formation and evolution mechanism of main secondary pores are studied in detail. The evolution model of volcanic rock reservoir is established and the reservoir distribution law is discussed. The conclusion and understanding of the comprehensive study are as follows: 1. There are many types of volcanic rocks in the study area, which are directly related to the composition, temperature, nature and eruption of magma. The petrochemistry analysis data of 8 wells in this area show that the volcanic rocks are mainly acidic eruption rocks, followed by neutral eruptive rocks. 2. There are 17 major secondary minerals in volcanic rocks in the study area. The types of secondary minerals are related to rock types. Different rock types have different secondary mineral assemblages and different secondary mineral assemblages of different rock types in the same area. According to the statistics of effective reservoir thickness data of 107 effective reservoirs in Yingyi formation of 36 wells in Xingcheng area, the effective reservoir is dominated by explosive facies, followed by overflow facies. 4 the most basic pore types of volcanic rocks in the study area are mainly primary pores. Secondary porosity, fracture 3 kinds. Primary pores are mainly pores, intergranular shrinkage pores, secondary pores are mainly debonding pores and corrosion pores, and fractures have two types: fracture and micro-fracture. The pore types such as pozzolanic dissolved pores and intergravelly internal pores can be formed by the combination of the above basic pores, and various pores play an important role in the reservoir. The sequence of pore formation and evolution was identified and established. Based on geological events and petrological evidence, the pore evolution was discussed, the pore development law was determined, the six stages of pore evolution were proposed, and the pore evolution model was established.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13

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