八面河油田微型断块圈闭表征技术与应用效果
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摘要
八面河油田受八面河基底走滑断层控制形成了反向正断层组,反向断层与断块圈闭相伴而生,形成了多层系、“反向屋脊式”油藏。随着深化勘探的需要,将断距小于30m的小断层、圈闭幅度小于20m、面积小于0.1km2的微型断块圈闭列为深化勘探的主要目标之一。提出了微型断块圈闭表征的主要技术与方法,首先利用测井、地质等信息落实断层目标,结合三维地震资料抓住反向断层关键,进行三维地震资料的精细解释。通过应用此项技术共发现圈闭8个,钻探井9口,累计新增探明储量平均218×104t/井,单井初期产油平均大于18t/d,取得了良好的经济效益。
In Bamianhe Oilfield an inversed-normal fault formation is formed by the controlling of base-strike-slip fault, the inverse fault is generated with the fault traps, by which a multiple strata “inverse roof” reservoir is created. Going with the needs of deepening exploration, the small fault with fault distance less than 30m, microscopic fault traps with trap amplitude less than 20m, its area less than 0.1km~2 are identified as one of the major targets of exploration. The main techniques for the microfault trap characterization are proposed. First the information of logging and geology is used to establish the fault target, and identify the focus of the inverse fault in combination with 3D seismic data, and precision interpretation of 3D seismic data is conducted. Eight traps are found out and 9 exploration wells are drilled by using the technique. Average increase of newly discovered reserves is 218×104 t/well, initial production of a single well is more than 18t/d in average, thus good economic benefit is achieved.
In Bamianhe Oilfield an inversed-normal fault formation is formed by the controlling of base-strike-slip fault, the inverse fault is generated with the fault traps, by which a multiple strata “inverse roof” reservoir is created. Going with the needs of deepening exploration, the small fault with fault distance less than 30m, microscopic fault traps with trap amplitude less than 20m, its area less than 0.1km~2 are identified as one of the major targets of exploration. The main techniques for the microfault trap characterization are proposed. First the information of logging and geology is used to establish the fault target, and identify the focus of the inverse fault in combination with 3D seismic data, and precision interpretation of 3D seismic data is conducted. Eight traps are found out and 9 exploration wells are drilled by using the technique. Average increase of newly discovered reserves is 218×104 t/well, initial production of a single well is more than 18t/d in average, thus good economic benefit is achieved.
引文
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[3]金强.关于东部油气富集盆地勘探可持续性的一些思考[J].油气地质与采收率,2002,9(1):5~8.
[4]张文华.层序地层学若干问题[J].石油勘探与开发,2002,29(2):18~21.
[5]瞿辉,赵文智.层序格架在油气勘探中的作用[J].石油勘探与开发,2000,27(5):40~43
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