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随着油气勘探向深部发展,深层油气藏已成为油气发现的重要组成部分。永进地区位于准噶尔腹部中石化中部3区块,勘探目的层埋藏深,大于5500m,储层主要以细砂岩、含砾砂岩为主,颗粒具有岩屑含量高、成分成熟度低、结构成熟度低等特点;多为特低孔、超低渗储层;储层孔隙类型有5种:残余原生粒间孔、粒间溶孔、粒内溶孔、泥质微孔和微裂缝;孔隙结构为特小孔微细喉型。储层物性影响因素主要有强烈压实成岩作用、弱溶解作用和黏土矿物充填3个方面,均造成孔渗性下降。该区油藏类型主要为地层、岩性油气藏,成藏模式为源上沿断—沿层油气成藏模式。
With the deep development of oil and gas exploration, deep reservoirs have become an important part of oil and gas discovery. The Yongjin area is located in block 3 of the central part of Junggar Belt. The exploration target layer is buried deep and more than 5500m. The reservoirs are mainly composed of fine sandstone and pebble sandstone. The particles are characterized by high lithic debris content, low maturity and low structural maturity And other characteristics; mostly ultra-low-porosity, ultra-low permeability reservoirs; reservoir pore types are five kinds: residual primary intergranular pores, intergranular dissolved pores, intragranular dissolved pores, argillaceous micro-pores and micro-cracks; pore structure Very small hole micro-throat type. The main influencing factors of reservoir physical properties include strongly compaction diagenesis, weak dissolution and clay mineral filling, which all lead to the decrease of porosity and permeability. The reservoir types in this area are mainly stratigraphic and lithologic reservoirs, and the reservoir forming mode is the hydrocarbon accumulation model along the fault-reservoir along the source.