热河台油田火山岩储层特征及油气富集规律

运用钻井揭露、测井解释、压汞测试、油藏解剖等多种分析测试手段,结合区域地质背景,系统研究了热河台油田的火山岩的形成地质背景、储层岩石类型及分布、油气展布特征,并分析其主控因素。研究表明研究区最主要的火成岩储层为粗面岩,粗面岩物性条件相对较好,有较好的产能,孔隙结构可分为3类;在纵向上粗面岩主要分布在沙三中亚段上部,可分为4个期次。4期火山岩沿北东-南西分布,Ⅱ期粗面岩厚度最大,Ⅲ期分布面积最广,Ⅱ期火山岩油层面积、厚度较大,是最好的勘探层。整个火山岩油藏类型属于构造-岩性油藏,油气水分布受构造、储层岩性、物性条件多重因素的控制和影响。

Characteristics of Volcanic Rock Reservoirs and Hydrocarbon Accumulation Rules in Rehetai Oilfield

By using various testing means,such as drilling revealing,well logging interpretation,mercury injection and reservoir analysis,and in combination with regional geological background,the geological background of volcanic rocks,reservoir rock types and distribution of oil and gas were systematically studied,and its main control factors were analyzed in Rehetai Oilfield.Research showed that the trachyte was the main reservoir,which had relatively good rock property conditions and good productivity.The pore structure could be divided into three types.In vertical rough surface rocks were mainly distributed in the upper position of the mid member of Es3 and it was divided into four periods,four stages of volcanic rocks were distributed respectively along the northeast to the southwest,the trachyte had the maximum thickness in Period Ⅱ,but the trachyte in Period Ⅲ was widely distributed and volcanic reservoirs were big thickness and it was the best exploration layer.The whole volcanic reservoir belongs to structural-lithologic reservoir,where oil-gas-water distribution is controlled and influenced by multi-factors such as structure,reservoir lithology and physical properties.