徐西地区营城组溢流相火山岩储层地震预测研究

发布时间：2018-05-26 08:18

本文选题：松辽盆地 + 溢流相　；参考：《中国石油大学(华东)》2015年硕士论文

【摘要】：本论文题目来源于国家973火山岩项目课题《火山岩储层及其油气藏识别与评价技术》。火山岩油气藏在大庆油田有着巨大的潜力,已经成为该探区岩性气藏的一个快速增长点。在过去十几年时间里,徐家围子断陷火山岩油气藏勘探多为寻找构造高部位、火山机构明显地区。随着明显火山机构的逐渐探明、深层天然气“精细勘探”思路的转变,同样具有工业气流的溢流相火山岩逐渐成为勘探热点。如何对远离火山口区且反射特征不典型的溢流相火山岩开展研究,同时识别出溢流相火山岩有利储层成为火山岩储层精细勘探的主要问题。相对比平稳沉积的沉积岩地层,深层火山岩具有多级次内幕结构,地层结构复杂、多喷发期次叠置严重、横向非均质性强,地震剖面上杂乱断续成层性差。针对此问题,本文综合地质、地震、测井等多手段采用组内部划段、段内识别火山岩地层、段内划分火山期次、以期次为时间格架精细剖分火山喷发岩体的思路对火山岩地层进行精细解释,剖析火山岩地层的叠置关系。火山岩相是控制储层分布范围,对于火山岩相研究非常重要。本文在单井优势岩相确定基础上,结合地震剖面、水平切片以及优选出的相干、曲率、均方根振幅等多属性对各期次火山岩相进行识别,逐步划分为火山通道相、爆发相、溢流相等三种岩相,为后续圈定溢流相有利储层奠定基础。火山岩地层复杂内幕制约了储层精细预测,针对这一问题本文利用火山喷发岩体约束叠后反演,开展火山岩储层叠后预测,取得较好预测效果。针对火山岩岩性复杂的特点,开展复杂岩性的岩石物理敏感参数分析,将火山岩分为基性、中性和酸性火山岩岩性组,并确定了各火山岩性组储层的门槛值,以此为指导思路开展叠前弹性反演实现对火山岩岩性及其对应储层的定量划分和预测。最终,综合储层物性分析、储层预测成果和火山岩相划分结果优选了溢流相火山岩有利储层区带。虽然溢流相火山岩储层勘探还处于初步并存在种种困难,但本次研究对推动后续复杂溢流相火山岩研究和提高精细火山岩预测的勘探精度具有重要的意义。
[Abstract]:The topic of this paper is from the national 973 volcanic rock project, the identification and evaluation technology of volcanic reservoir and its oil and gas reservoir. Volcanic reservoir has great potential in Daqing Oilfield and has become a rapid growth point of lithologic gas reservoir in this exploration area. In the past ten years, the exploration of volcanic oil and gas reservoirs in Xujiaweizi fault depression is mostly to find the high structural position and the obvious volcanic mechanism. With the gradual discovery of obvious volcanic mechanism and the transformation of the idea of "fine exploration" of deep natural gas, the overflow volcanic rock with industrial airflow has gradually become a hot spot of exploration. How to study the overflow facies volcanic rocks which are far away from the crater area and whose reflection characteristics are not typical and at the same time identify that the favorable reservoir of the overflow facies volcanic rocks becomes the main problem of the fine exploration of volcanic rock reservoir. In contrast to the sedimentary strata of stable deposition, the deep volcanic rocks have multistage subinsider structure, complex stratigraphic structure, severe multiple eruptions, strong lateral heterogeneity, and poor stratification on the seismic profile. In order to solve this problem, in this paper, comprehensive geological, seismic, logging and other means are used to segment within the group, in which volcanic strata are identified, and volcanic periods are divided within the section. It is expected that the time frame fine division of volcanic eruptive rock mass can explain the volcanic strata and analyze the superposition of volcanic strata. Volcanic facies control reservoir distribution, and are very important for the study of volcanic facies. Based on the determination of dominant lithofacies of single well, combined with seismic profile, horizontal section and selected coherence, curvature and root mean square amplitude, the subvolcanic facies are identified and divided into volcanic passageway facies and eruptive facies step by step. The spillway is equal to three lithofacies, which lays the foundation for delineating the favorable reservoir of overflow facies. The complicated interior of volcanic strata restricts the fine prediction of reservoir. In view of this problem, the post-stack prediction of volcanic reservoir is carried out by using the constrained post-stack inversion of volcanic eruptive rock mass, and good prediction results are obtained. In view of the complex lithology of volcanic rock, the petrophysical sensitive parameter analysis of complex lithology is carried out, and the volcanic rock is divided into basic, neutral and acidic volcanic lithology groups, and the reservoir threshold value of each volcanic lithologic group is determined. Based on this idea, prestack elastic inversion is used to realize the quantitative division and prediction of volcanic lithology and its corresponding reservoirs. Finally, comprehensive reservoir physical analysis, reservoir prediction results and volcanic facies division results selected overflow facies volcanic rocks favorable reservoir zone. Although the exploration of overflow volcanic rock reservoir is still at a preliminary level and some difficulties exist, this study is of great significance in promoting the further study of complex overflow facies volcanic rock and improving the exploration accuracy of fine volcanic rock prediction.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P631.4;P618.13

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