...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Asian earth sciences >Impact of early hydrocarbon charge on the diagenetic history and reservoir quality of the Central Canyon sandstones in the Qiongdongnan Basin, South China Sea
【24h】

Impact of early hydrocarbon charge on the diagenetic history and reservoir quality of the Central Canyon sandstones in the Qiongdongnan Basin, South China Sea

机译：早期油气充注对南海琼东南盆地中部峡谷砂岩成岩历史和储层质量的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The Central Canyon sandstones, located in the Ledong-Lingshui Depression, Qiongdongnan Basin, South China Sea, are the main reservoirs of the deep-water area. The present study aimed to examine the diagenetic processes and reservoir quality of these sandstones. Using an integrated approach of examination of casting thin sections, X-ray diffraction, porosity and permeability measurements, scanning electron microscopy, carbon and oxygen stable isotope analyses, fluid inclusion analyses and electron microprobe analysis, we analysed the diagenetic features of the sandstones and the reservoir quality of the LD30-1 and LS17-2 sandstones, respectively. The results showed that the sandstones consist of lithic arkoses and sublitharenites, the main pore systems consist of primary intergranular pores and secondary pores, and the main cements consist of authigenic quartz, clay minerals, and carbonates. By combining the analyses of burial history and hydrocarbon charging history, we discovered that the LD30-1 sandstone reservoirs and the LS17-2 sandstone reservoirs are quite different. A significant negative shift in delta C-13 and delta O-18 (ranging from - 4.88 parts per thousand to -2.27 parts per thousand and from -11.83 parts per thousand to - 5.96 parts per thousand, respectively) is evident in the carbonate cements of the LD30-1 sandstones, and oxidation of organic matter had an important role in the occurrence of the carbonate cements. However, relatively high and concentrated delta C-13 and delta O-18 values in the LS17-2 sandstones, ranging from -1.76 parts per thousand to - 0.48 parts per thousand and - 5.04%o to - 2.95 parts per thousand, respectively, are closer to the original isotopic compositions. Based on casting thin sections, the abundance of quartz overgrowths in the LD30-1 sandstones is higher than that in the IS17-2 sandstones. The development of each clay mineral in the LD30-1 and LS17-2 sandstones is quite different. The LS17-2 sandstones have higher reservoir quality than the LD30-1 sandstones. Early hydrocarbon charge is an important factor causing the differences of diagenetic minerals and reservoir quality between the LS17-2 sandstones and the LD30-1 sandstones.
机译：位于南海琼东南盆地乐东—陵水De陷的中央峡谷砂岩是深水区的主要储层。本研究旨在检查这些砂岩的成岩过程和储层质量。使用一种集成的方法来检查铸件的薄层，X射线衍射，孔隙率和渗透率测量，扫描电子显微镜，碳和氧稳定同位素分析，流体包裹体分析和电子显微探针分析，我们分析了砂岩和岩石的成岩特征。 LD30-1和LS17-2砂岩的储层质量。结果表明，砂岩由岩性的阿格糖和亚锂质组成，主要的孔隙系统由主要的粒间孔和次生孔隙组成，主要的胶结物由自生石英，粘土矿物和碳酸盐组成。通过对埋藏历史和烃类充填历史的分析，我们发现LD30-1砂岩储层和LS17-2砂岩储层存在很大差异。在碳酸盐水泥中，δC-13和δO-18发生了显着的负向变化（分别从-4.88千分至-2.27千分和从-11.83千分至-5.96千分）。 LD30-1砂岩的成因，有机质的氧化在碳酸盐胶结物的发生中起重要作用。但是，在LS17-2砂岩中，相对较高且集中的δC-13和δO-18值分别从千分之1.76到千分之0.48，以及千分之5.04％到千分之2.95。更接近原始同位素组成。基于薄壁铸件，LD30-1砂岩中石英过度生长的丰度高于IS17-2砂岩。 LD30-1和LS17-2砂岩中每种粘土矿物的发育都有很大不同。 LS17-2砂岩的储层质量高于LD30-1砂岩。早期碳氢化合物装填是导致LS17-2砂岩和LD30-1砂岩之间成岩矿物和储层质量差异的重要因素。

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