储层精细研究技术在老区挖潜中的应用——以黄骅坳陷板南油区为例
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摘要
黄骅坳陷板南油区已进入开发中后期,寻找储量接替区是目前面临的重要问题。针对该油区断裂复杂、小幅度构造发育、储层薄而且变化快的特点,提出了储层精细研究的技术思路,旨在通过地震约束的等时小层对比、斜井空间校正、井震三维空间标定、小波域地震相干技术和真三维地震精细解释,解决小断层、小断块和微构造,和通过沉积相研究和岩性反演,解决单砂体的空间展布问题。运用该项技术的结果表明,本区油气受构造和岩性双重控制,层间构造发育,微构造、小断块内断层附近区域和前期解释遗漏的油砂体是增储上产的3个主要领域。根据该项研究成果在板南油区布署的3口井(B21-3井、B21-4井和N5-6井)均获得高产油气流,表明该项技术在开发中后期油田增储挖潜中具有推广价值。
The Bannan Oilfield is on its later stages of development,new discovery of oil potential is inevitably the most reliable way in sustaining its historical importance of production.A refined technique portfolio is developed to achieve a better understanding of reservoirs featuring heavily faulted,low relief,thin beds with narrow lateral extension.The problems arising from the recognition of micro-faults,tiny blocks,and micro-structures are tackled in this paper through a series of techniques as: seismic aided genetic correlation,slant well trajectory calibration,3D seismic-well tying,wavelet domain coherence and true three-dimensional seismic based structural modeling.The spatial extension of individual sand bodies is delineated based on micro-facies analysis and lithological inversion.The study shows that the distribution of oil and gas accumulations is governed by both structural features and lithological variations.Sub-bed group structures are well developed.These micro structures,together with the fault proximity regions and the previous undiscovered oil-bearing sand bodies contribute to the major sustaining potential.The promising oil and gas flows of the 3 wells drilled based on this study are prudently advertising the remarkable value of this technical practice in extending the life of developed oil fields.
The Bannan Oilfield is on its later stages of development,new discovery of oil potential is inevitably the most reliable way in sustaining its historical importance of production.A refined technique portfolio is developed to achieve a better understanding of reservoirs featuring heavily faulted,low relief,thin beds with narrow lateral extension.The problems arising from the recognition of micro-faults,tiny blocks,and micro-structures are tackled in this paper through a series of techniques as: seismic aided genetic correlation,slant well trajectory calibration,3D seismic-well tying,wavelet domain coherence and true three-dimensional seismic based structural modeling.The spatial extension of individual sand bodies is delineated based on micro-facies analysis and lithological inversion.The study shows that the distribution of oil and gas accumulations is governed by both structural features and lithological variations.Sub-bed group structures are well developed.These micro structures,together with the fault proximity regions and the previous undiscovered oil-bearing sand bodies contribute to the major sustaining potential.The promising oil and gas flows of the 3 wells drilled based on this study are prudently advertising the remarkable value of this technical practice in extending the life of developed oil fields.
引文
[1]王西文,苏明军,王大兴,等.相控—等时小层对比方法及应用[J].石油勘探与开发,2003,30(6):78-80.
[2]王西文,杨孔庆,周立宏,等.基于小波变换的地震相干体算法研究[J].地球物理学报,2002,45(6):847-852.
[3]Reshel M.The use of 3-D prestack depth imaging to estimatelayer velocities and reflect or positions[J].Geophysics,1997,62(1):206-210.
[4]Whitmore N D,Caring J D.Interval velovily estimation usingiterative prestack depth migration in the constant angle domain[J].The Leading Edge,1993,12(7):757-762.
[5]陈启林,杨占龙.岩性油气藏勘探方法与技术[J].天然气地球科学,2006,17(5):622-626.
[6]王德发,张服民,孙永传,等.黄骅拗陷第三系沉积相及沉积环境[M].北京:地质出版社,1987:29-62.
[7]陈纯芳,赵澄林,李会军.板桥和歧北凹陷沙河街组深层碎屑岩储层物性特征及其影响因素[J].石油大学学报:自然科学版,2002,26(1):4-7.
[8]魏立花,郭精义,杨占龙,等.测井约束岩性反演关键技术分析[J].天然气地球科学,2006,17(5):731-735.
[9]石占中,张一伟,熊琦华,等.大港油田港东开发区剩余油形成与分布的控制因素[J].石油学报,2005,26(1):79-82.
[2]王西文,杨孔庆,周立宏,等.基于小波变换的地震相干体算法研究[J].地球物理学报,2002,45(6):847-852.
[3]Reshel M.The use of 3-D prestack depth imaging to estimatelayer velocities and reflect or positions[J].Geophysics,1997,62(1):206-210.
[4]Whitmore N D,Caring J D.Interval velovily estimation usingiterative prestack depth migration in the constant angle domain[J].The Leading Edge,1993,12(7):757-762.
[5]陈启林,杨占龙.岩性油气藏勘探方法与技术[J].天然气地球科学,2006,17(5):622-626.
[6]王德发,张服民,孙永传,等.黄骅拗陷第三系沉积相及沉积环境[M].北京:地质出版社,1987:29-62.
[7]陈纯芳,赵澄林,李会军.板桥和歧北凹陷沙河街组深层碎屑岩储层物性特征及其影响因素[J].石油大学学报:自然科学版,2002,26(1):4-7.
[8]魏立花,郭精义,杨占龙,等.测井约束岩性反演关键技术分析[J].天然气地球科学,2006,17(5):731-735.
[9]石占中,张一伟,熊琦华,等.大港油田港东开发区剩余油形成与分布的控制因素[J].石油学报,2005,26(1):79-82.
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