煤心定向的古地磁方法初探  

Preliminary Study on Paleomagnetic Method of Coal Core Orientation

作　　者：卫弼天 Wei Bitian(State Key Laboratory of Continental Dynamics,Northwest University,Xi’an 710069,China;Department of Geology,Northwest University,Xi’an 710069,China)

机构地区：[1]西北大学大陆动力学国家重点实验室,西安710069 [2]西北大学地质学系,西安710069

出　　处：《中国资源综合利用》2020年第2期66-68,共3页China Resources Comprehensive Utilization

摘　　要：煤层渗透性是影响煤层气含量及能否持续高效抽采的重要因素,裂缝是煤层气藏主要的渗流通道,识别出煤层裂缝空间展布可为研究煤层气储量以及煤层气开采生产井密度和位置、布置注水井网、控制注水压力及注水量等提供重要的参考依据。本文结合油气勘探中岩心定向方法,提出一种将古地磁岩心定向技术用于煤层气勘探开发中的新思路。结果表明,通过获取黏滞剩磁(VRM)来对煤心定位的方法可以实现。本文提出的研究方法具有可定量化、操作简单、成本低、针对性强的特点,可为我国煤层气的勘探和开发技术创新提供新的参考依据。Coal seam permeability is an important factor affecting the content of coal seam gas and whether it can be continuously and efficiently extracted.Fractures are the main seepage channels for coalbed gas reservoirs.The identification of the spatial distribution of coal seam fractures can provide important reference for studying coalbed methane reserves and density and location of production wells for coalbed methane production,laying out water injection well patterns,controlling water injection pressure and water injection volume,etc.Based on the core orientation method in oil and gas exploration,this paper proposes a new idea for applying paleomagnetic core orientation technology to coalbed methane exploration and development.The results show that the method of locating coal cores by obtaining VRM can be achieved.The research method proposed in this paper has the characteristics of quantification,simple operation,low cost and strong pertinence,which can provide new reference for China’s coalbed methane exploration and development technology innovation.

关 键 词：古地磁 煤心 岩心定向 VRM 

分 类 号：P631.2[天文地球—地质矿产勘探]