节点文献

中国大陆科学钻探井中磁热资源处理与分析

Processing and Analysis to Borehole Magnetic & Geothermal Data of China Continent Scientific Drilling

【作者】 曾冲

【导师】 陈超;

【作者基本信息】 中国地质大学 , 地球探测与信息技术, 2005, 硕士

【摘要】 中国大陆科学钻探(CCSD)工程是利用现代深部钻探技术,在具有全球地学意义的中朝和扬子板块之间于中生代碰撞形成的大别—苏鲁超高压变质岩(UHPM)带的东段实施中国第一口5000m科学深钻。中国大陆科学钻探对我国地球科学的研究具有十分重要的意义,其对解决中国大陆的许多关键性科学问题起着重要的作用。地球物理测井是其重要组成部分。测井可提供的井温、压力等参数和磁场、重力场、热场、自然电场等丰富的高精度原位信息,有利于获取和推测原始条件下的岩石参数,为研究超高压变质岩的形成与折返机理、深部物质组成与结构、地球动力学过程和壳—幔相互作用、资源的开发及地震发生机制等方面的提供基础性资料及数据。 中国大陆科学钻探(CCSD)先后进行了两口预先导孔(CCSD-PP1和CCSD-PP2)的试钻,其主孔CCSD-1井于2001年6月试钻,截止于2005年4月停钻,终孔深度5118.20m。期间先后进行了多次测井工作,获取了大量宝贵的地质与地球物理资料。 本文根据100~3600m的井中温度测量和井中磁化率、井中磁三分量测量资料,进行了一系列数据处理和分析工作,计算了大量的井中磁场、热场及岩石物性等参数,得出了许多宝贵的基础性数据,解释了井中地磁场、地热场的主要异常,对岩石物性与井中磁、热场的关系加以讨论,并提出了一些有待深入研究的问题。 主要的处理工作包括: (1)测井数据的预处理。主要包括100~2000m测井数据的深度标定,0~3600m的测井资料的拼接以及全井数据点距的统一。 (2)井中热场参数的计算。包括温度资料的圆滑滤波、地温梯度的计算、岩石热产率的计算、井中岩石热导率的计算井中热流的计算等。 (3)井中磁场参数的计算。包括计算井中岩石磁化率分布,井中地磁总场及其垂直分量和水平分量的模量。 (4)井中磁场、热场及岩石物性的统计。包括按照CCSD工程中心提供的岩性分层表进行按层位统计,按岩性的不同进行按厚度加权平均统计等。 主要的分析工作包括: (1)井中温度、温梯、热流及岩石热物性的基本特征分析,井中温度和温梯的统计分析,温度与温梯异常的解释等。 (2)井中磁场的基本特征与统计分析,井中岩石磁化率随深度的分布特征分析,产生负磁化率的原因,岩石磁化率的统计分析,岩石磁化率与其密度、钾(K)和铀(U)含

【Abstract】 China Continent Scientific Drilling (CCSD) Project sunk the first 5km deep well using the ultra-deep drilling technology in the east Dabie-Sulu ultra-high-pressure metamorphic (UHPM) zone in China generated by the collision of China-Korea plate and Yangtze plate in mesozoic which has a global geosciences significance. It also has an important significance to the research study of geosciences in China and important to the solution of many key problems of China continent. Geophysical logging is the basic component of CCSD. Plenty of the high precision primary information of borehole temperature, pressure, magnetic field, gravity field, thermal field and self potential data provided by logging is propitious to gathering and study of characters of rocks in the original circumstances. It provides the basal data and information for the study of mechanism of UHPM’s generation and return, component and structure of deep mass, process of geodynamics, mutual actions of the crust and mantle, exploration of resources, mechanism of earthquake and so on.Two pilot holes (CCSD-PP1 and CCSD-PP2) were drilled experimentally by CCSD orderly. The drilling of primary hole (CCSD-1) was start at June of 2001 and finished at April of 2005 with the 5118.20m total depth. Much valuable geophysical and geological data was obtained by times logging in the period.A series of data processing and analysis was carried out here based on the borehole temperature data, borehole susceptibility data and magnetic data of 100-3600m. Many parameters of the borehole magnetic field, thermal field and rock properties were calculated and much valuable basic data and information was obtained. The primary anomaly of the borehole magnetic field and thermal field was interpreted. The relationship between the thermal field, the magnetic field and the rock properties was discussed and some problems need much more study was brought out.The primary processing here includes:(1) Preprocessing of the logging data. It mostly includes the depth correction from 100 to 2000m, the consistency processing and coherence processing of the data from 0 to 3600m.

  • 【分类号】P634
  • 【被引频次】1
  • 【下载频次】115
节点文献中: 

本文链接的文献网络图示:

本文的引文网络