潜江凹陷周返地区潜江组岩性油藏勘探潜力分析
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摘要
江汉盆地潜江凹陷周返地区处于潜江组砂岩尖灭线附近,是岩性油藏形成的有利地区,是近期挖潜增产的重要目标区。通过综合评价,认为位于研究区东侧水下分流河道末端的指状砂岩体发育区是潜四段岩性油藏滚动勘探的有利区,返Ⅲ断层上升盘是潜三段断层-岩性油藏勘探的有利区;精细小层对比和地震振幅属性储层预测是该区岩性油藏勘探的主要方法;水下分流河道末端的砂体物性差,干带范围较宽,在井位部署时必须引起重视。
Zhoufan Area of Qianjiang Depression in Jianghan Basin is in the vicinity of pinchout boundary of Qianjiang Formation sandstone and is favorable for formation of lithologic oil pools.The area is also an important target area for increasing oil production in the near future.On the basis of comprehensive evaluation efforts,the authors think that the area with developed bar finger sandstone bodies at distal end of distributary channel located in eastern side of study area is favorable for rolling exploration of lithologic reservoirs in Qian-4 Member;uplifted wall of Fan-Ⅲfault is favorable for exploration of fault-lithologic reservoirs in Qian-3 Member;main exploration methods of lithologic reservoirs in the area include fine subzone comparison and reservoir prediction based on seismic amplitude attributes;because of poor physical property and relatively broad dry zone range of sand bodies at distal end of distributary channel,we should pay great attention to these factors when deploying well location.
Zhoufan Area of Qianjiang Depression in Jianghan Basin is in the vicinity of pinchout boundary of Qianjiang Formation sandstone and is favorable for formation of lithologic oil pools.The area is also an important target area for increasing oil production in the near future.On the basis of comprehensive evaluation efforts,the authors think that the area with developed bar finger sandstone bodies at distal end of distributary channel located in eastern side of study area is favorable for rolling exploration of lithologic reservoirs in Qian-4 Member;uplifted wall of Fan-Ⅲfault is favorable for exploration of fault-lithologic reservoirs in Qian-3 Member;main exploration methods of lithologic reservoirs in the area include fine subzone comparison and reservoir prediction based on seismic amplitude attributes;because of poor physical property and relatively broad dry zone range of sand bodies at distal end of distributary channel,we should pay great attention to these factors when deploying well location.
引文
[1]陈凤玲等.潜江盐湖构造演化及沉积充填与油气成藏[J].江汉石油学院学报,2007(2).
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[2]方志雄.潜江凹陷隐蔽油藏成藏主控因素及勘探方向[J].石油与天然气地质,2006(6).
[3]孙镇城、杨藩等.中国新生代咸化湖泊沉积环境与油气生成[M].北京:石油工业出版社,1997.
[4]周书欣等.湖泊沉积体系与油气[M].北京:科学出版社,1991.
[5]吕锡敏.岩性油气藏勘探理论和方法体系研究[J].西北大学学报,2005(2).
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