摘要
"河包场—界石场"储层具有低压、低孔、低渗、高束缚水饱和度的特点,是四川盆地低压致密砂岩气藏的典型代表。该气藏单井自然产能低,气井压裂前基本不具备经济开采价值。水力加砂压裂工艺技术是该气藏获得工业性开采的必要手段,但前期压裂效果表明,常规的低渗透水力加砂工艺技术在该区域改造效果不明显。文章基于"河包场—界石场"低压致密气藏阶段研究成果,从储层压裂潜力识别、岩石力学、地应力以及水力加砂压裂优化设计等方面,探讨了水力压裂改造技术在低压致密气藏的应用效果。
The reservoir in 'Hebaochang-Jieshichang' is low-pressure, low porosity, low permeability and higher SWB, it is the typical examples of low pressure tight sandstone gas reservoirs in Sichuan Basin. The naturalness productivity of single well is low, so it is not economical before it is fractured. Sand hydraulic fracturing technology is the necessary means of economically exploitation of this gas reservoir. But the antecedent fracturing results show that conventional low permeability hydraulic sand fracturing technology for this reservoir is ineffective. Based on the former research results of 'Hebaochang-Jieshichang' tight gas reservoir, this paper discusses the application effect of hydraulic fracturing technique in low pressure and tight sandstone gas reservoirs in such aspects: potential identificaiton of reservoir fracturing, rock mechanics, crustal stress and optimization design for hydraulic sand fracturing technology and so on, and provides references for reader to redonstruct the low permeability sandstone reservoirs in Xujiahe formation of Sichuan Basin.
出处
《天然气技术》
2007年第6期17-20,36,共5页
NATURAL GAS TECHNOLOGY
关键词
低压
致密气藏
储层识别
加砂压裂
地应力
Low pressure Tight gas reservoir Reservoir identification Sand fracturing Crustal stress