Reformation Mechanism of High-Quality Carbonate Reservoirs in Northeastern Sichuan Basin
详细信息
- 责任者：Luo Kaiping (Wuxi Research Institute of Petroleum Geology ; SINOPEC ; Wuxi 214151 ; China) ; Huang Zeguang
- 刊名：Petroleum Geology & Experiment
- 出版年：2011
- 卷期：33(6)
- 关键词：碳酸盐岩储集层 ; carbonate reservoirs ; 埋藏成岩作用 ; burial diagenesis ; 四川盆地 ; Sichuan Basin
- 页码：p.559-563
- 图表：4 illus., 12 refs.
- 分类号：1003
- issnNo：ISSN1001-6112
- isbnNo：CN32-1151/TE
摘要
The high-quality carbonate reservoirs in Puguang Gas Field of the northeastern Sichuan Basin are mainly dolomites of reef-bank facies. Secondary intragranular and intergranular pores work as the main reservoir spaces, accompanied with significant tectonic track ways. The secondary pores generated from 2 stages of dissolution during burial history. The 2 stages of tectonic movement (the early and the middle-late Yanshan movements) occurred at the same time as the 2 stages of dissolution, which gave birth to fractures and microfractures. Rock permeability was improved and acid fluids migrated into rocks. Non-selective dissolutions happened and “fracture-dissolved pore” combination formed.