• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>NATC North Africa Technical Conference >Gas Shale Characterization – Results of the Mineralogical, Lithological and Geochemical Analysis of Cuttings Samples from Radioactive Silurian Shales of a Palaeozoic Basin, SW Algeria
【24h】

Gas Shale Characterization – Results of the Mineralogical, Lithological and Geochemical Analysis of Cuttings Samples from Radioactive Silurian Shales of a Palaeozoic Basin, SW Algeria

机译：气页岩特征——阿尔及利亚西南部古生代盆地放射性志留系页岩岩屑样品的矿物学、岩性和地球化学分析结果

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The successful recovery of hydrocarbons from shales is dependent on physical rock properties such as lamination, brittleness and the presence of natural fractures, as well as chemo-physical properties such as absorption and adsorption. The key parameters defining the hydrocarbon potential of shales are the mineralogy, organic carbon content (TOC) and burial history. These parameters are commonly derived by conventional and special core analysis of SWCs or cores. This study highlights that most of the analyses and techniques used to determine the hydrocarbon potential of shales can also be performed on cuttings material with a high degree of confidence. The usage of cutting material has significant advantages with respect to sample availability, sample coverage and acquisition costs. Accurate depth allocation of cuttings is problematic but, by careful reference of the measured mineralogical and textural features to the available mudlog and wireline data, the effects can be minimised. As part of a research project, SGS analysed the mineralogical and lithological composition of 80 cuttings samples, from various wells in the Radioactive Silurian Shale (drilled a Palaezoic Basin, SW of Algeria) by QEMSCAN. In addition, the geochemistry and maturity parameters were determined by Leco (TOC) and RockEval (S1-S3) methods. Furthermore high resolution 3D computer tomography scans (CT) were performed in order to analyse the cutting material for lamination and micro-fractures. The compilation and interpretation of the mineralogical, lithological and geochemical data indicate significant vertical and lateral heterogeneities, probably induced by local facies changes, which possibly lead to strong variances in the shale gas potential. The properties of the Silurian hot shale samples were compared with QEMSCAN results of shale samples from Canada, UK, published data from the US gas shales and source rocks from Netherlands and Sweden. Based on the comparison, a distinct trend could be established, indicating significant differences in mineral composition between producing gas shales and other more “conventional” gas source rocks.
机译：从页岩中成功回收碳氢化合物取决于岩石的物理性质，如分层、脆性和天然裂缝的存在，以及化学物理性质，如吸收和吸附。确定页岩油气潜力的关键参数是矿物学、有机碳含量（TOC）和埋藏史。这些参数通常由SWC或岩芯的常规和特殊岩芯分析得出。这项研究强调，大多数用于确定页岩油气潜力的分析和技术也可以对岩屑材料进行高置信度的测试。切割材料的使用在样品可用性、样品覆盖率和获取成本方面具有显著优势。岩屑的准确深度分配存在问题，但通过仔细参考测得的矿物学和结构特征以及可用的泥浆测井和电缆数据，可以将影响降至最低。作为一个研究项目的一部分，SGS分析了80个岩屑样本的矿物学和岩性组成，这些岩屑样本来自QEMSCAN在放射性志留系页岩（阿尔及利亚西南部的Palaezoic盆地钻探）的不同油井。此外，通过Leco（TOC）和RockEval（S1-S3）方法确定了地球化学和成熟度参数。此外，还进行了高分辨率3D计算机断层扫描（CT），以分析切割材料的分层和微裂缝。矿物学、岩性和地球化学数据的汇编和解释表明，存在明显的纵向和横向不均质性，可能是由局部相变化引起的，这可能导致页岩气潜力的巨大差异。志留系热页岩样品的性质与加拿大、英国页岩样品的QEMSCAN结果、美国页岩气和荷兰及瑞典烃源岩的公布数据进行了比较。根据比较，可以确定一个明显的趋势，表明产气页岩和其他更“常规”气源岩之间的矿物成分存在显著差异。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号