Scholarlink

Systematic investigation of micropore structures and diagenesis in tight reservoirs provides critical insights for hydrocarbon sweet spot prediction. This study examines the Chang-7 tight oil reservoir in the western Ordos Basin, integrating core samples, thin sections, SEM, XRD, mercury intrusion, and well logging data to identify key reservoir quality controls. Key findings reveal: (1) Median pore-throat radius and sorting coefficient exhibit the strongest sensitivity to reservoir quality; (2) High ductile component content in Chang-7 drives intense compaction; (3) Quartz cementation positively correlates with feldspar dissolution pores (R2 = 0.82); (4) Chlorite-coated sandstones show 12–18% higher porosity preservation due to inhibited quartz overgrowth; (5) Bimodal dissolution (feldspar + carbonate minerals) enhances reservoir porosity by 3.5–5.2% points.

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Prediction of Hydrocarbon “Sweet Spots” Through Systematic Study Tight Oil Reservoir Quality

  • 会议论文

  • 发表日期：

    2026年

查看全文
  • Weigang Zhang,
  • Longfei Guo,
  • Man Tang,
  • Ming Han,
  • Junhui Zhao,
  • Le Qu

摘要

Systematic investigation of micropore structures and diagenesis in tight reservoirs provides critical insights for hydrocarbon sweet spot prediction. This study examines the Chang-7 tight oil reservoir in the western Ordos Basin, integrating core samples, thin sections, SEM, XRD, mercury intrusion, and well logging data to identify key reservoir quality controls. Key findings reveal: (1) Median pore-throat radius and sorting coefficient exhibit the strongest sensitivity to reservoir quality; (2) High ductile component content in Chang-7 drives intense compaction; (3) Quartz cementation positively correlates with feldspar dissolution pores (R2 = 0.82); (4) Chlorite-coated sandstones show 12–18% higher porosity preservation due to inhibited quartz overgrowth; (5) Bimodal dissolution (feldspar + carbonate minerals) enhances reservoir porosity by 3.5–5.2% points.