廊固凹陷大柳泉鼻状构造带精细勘探与油气发现
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摘要
大柳泉构造带是基于廊固凹陷二次三维地震连片一体化平台基础上,重新划分的一个鼻状构造带,其具有多个局部构造和多个勘探领域,具备整体含油气的有利条件。近两年,在琥珀营北地区通过"五个精细和四个重新认识"的具体做法,即精细构造解释、精细储层预测、精细综合评价、精细目标论证和精细井位标定,重新认识构造成因、砂体微相、成藏模式和勘探潜力,钻探5口井均获成功。在固安地区创新勘探思路的"四个转变",即从中深层向浅层勘探转变、从局部向整体研究转变、从油藏向气藏研究转变和AVO由定性向定量预测转变,发现了浅层高产天然气藏。大柳泉构造带按照整体勘探思路,集中钻探13口井,有11口井获工业油气流,钻探成功率达85%,勘探获得多项新发现,形成了5000×104t以上的整装规模储量,取得显著勘探成效。大柳泉鼻状构造带精细勘探的成功做法对其他老探区的勘探具有一定的指导和借鉴作用。
Daliuquan structure is a nose structural belt re-defined on the secondary joint 3D seismic integrated platform of Langgu Depression. It has a number of structures and exploration fields, with favorable conditions for containing oil and gas. In recent two years, five exploration wells have been successfully drilled in Hupoying area thanks to a number of measures, such as detailed interpretation of structures, detailed projection of reservoirs, comprehensive detailed assessment, detailed verification of targets, and determination of accurate well locations as well as re-understanding of structural origins, sand body microfacies, accumulation model and exploration potential. A new mindset for exploration of Gu an region has been created to turn from middle and deep layers to shallow layers, from partial area to the whole area, from oil reservoirs to gas reservoirs, and from determination of properties to determination of quantum for AVO. As a result, highyield natural gas reservoirs have been found in the shallow layers. A total of 13 wells were drilled in Daliuquan structural belt in accordance with the overall exploration mindset. Of those, 11 wells acquired industrial oil and gas flow, with the drilling success rate reaching 85 percent. A number of new discoveries have been made in exploration. The overall reserves exceeded 5000 × 10 4 t, making exploration results remarkable. The success of detailed exploration in Daliuquan nose structural belt has certain guidance on some other old exploration areas.
Daliuquan structure is a nose structural belt re-defined on the secondary joint 3D seismic integrated platform of Langgu Depression. It has a number of structures and exploration fields, with favorable conditions for containing oil and gas. In recent two years, five exploration wells have been successfully drilled in Hupoying area thanks to a number of measures, such as detailed interpretation of structures, detailed projection of reservoirs, comprehensive detailed assessment, detailed verification of targets, and determination of accurate well locations as well as re-understanding of structural origins, sand body microfacies, accumulation model and exploration potential. A new mindset for exploration of Gu an region has been created to turn from middle and deep layers to shallow layers, from partial area to the whole area, from oil reservoirs to gas reservoirs, and from determination of properties to determination of quantum for AVO. As a result, highyield natural gas reservoirs have been found in the shallow layers. A total of 13 wells were drilled in Daliuquan structural belt in accordance with the overall exploration mindset. Of those, 11 wells acquired industrial oil and gas flow, with the drilling success rate reaching 85 percent. A number of new discoveries have been made in exploration. The overall reserves exceeded 5000 × 10 4 t, making exploration results remarkable. The success of detailed exploration in Daliuquan nose structural belt has certain guidance on some other old exploration areas.
引文
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