摘要
研究了辽河盆地下第三系深部碎屑岩储层的成岩作用及孔渗性 ,认为次生孔隙形成主要有浅部大气淡水淋滤、中部有机酸脱羧和粘土矿物脱水产生的压实流体溶解及深部热循环流体的溶解 -沉淀 3种模式 .分析了次生孔隙的分布状况 ,结果表明 ,不同地区、不同层位、不同构造的次生孔隙的形成机理不同 ,在常压带、深部构造部位、斜坡带。
The research of evolutionary pattern and distribution of the secondary pores in the deep clastic reservoirs is always difficult. Taking the deep clastic reservoirs of Low Tertiary in Liaohe Basin as example, through geochemistry analysis, researches of the diagenesis and pore and permeability data, this paper concludes that the evolutionary pattern of secondary pores may fall into 3 categories: The first is the surface epidiagenesis and infiltration of air fresh water. The second is the middle dissolution of compacted fluid caused by decarboxylation of organic acid and dewatering of clay mineral. The third is the deep dissolution\|precipitation of thermal convection fluid. The research suggested that the evolutionary pattern and distribution of secondary pore is different in location, layer and structure. The secondary pore zone may develop at the normal press zone, deep structure limbs, slope zone, two sides of central lift zone and the top of palaeohigh.
出处
《大庆石油学院学报》
CAS
北大核心
2002年第3期12-14,共3页
Journal of Daqing Petroleum Institute
基金
中国石油天然气集团公司科研项目 ( 970 2 0 6 - 0 2 - 0 1- 0 6 - 1a)
