泌阳凹陷南部地区岩性油藏预测技术与效果

Technique and Effect of Lithological Reservoir Prediction in the South of Biyang Depression

泌阳凹陷南部陡坡带岩性油藏分布不仅受构造单元的控制,同时也受到岩性组合、生储盖配置方式的控制。为了查明泌阳凹陷栗园地区岩性油藏的空间展布,提供准确的钻探目标,在分析和研究砂砾扇体发育的控制因素及岩性圈闭成因模式的基础上,以三维地震资料为基础,依据古地貌的沟扇对应理论,利用层序地层学、地震相识别技术、地震属性分析和地震反演技术对岩性油藏进行了识别与描述。依据描述成果部署的B304、B315、B321、B325、B326等井均钻遇较厚的油层,新增探明储量851×104t。

In the southern steep slope zone,the lithologic reservoir distribution was not noly controlled by tectonic unit,also controlled by lithologic assemblage,the allocation of source rocks,reservoirs and cap rocks.To identify the space distribution of lithologic reservoirs in Liyuan Area of Biyang Depression and provide accurate drilling targets,the control factors of shale fan growth and genetic mode of lithologic traps were analyzed and studied,sequence stratigraphy,techniques of seismic facies identification,seismic attribute analysis and seismic reverse were used for lithologic reservoir recognition and description on the bases of paleogeomorphic ditch-fan corresponding theory,3Dseismic data.Based on the studied result Wells B304,B315,B321,B325 AND B326 are arranged and thicker oil zones are drilled,newly increased reserves are 851×104t.