脉冲地震波促进离散油团运移的力学机制及数值模拟
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摘要
油气二次运移是油气勘探中,作为油气储存和输运的载体,孔隙介质起着非常重要的作用。因此,要研究运移规律,必须首先搞清楚地下流体在孔隙介质中的行为及其与介质之间的相互作用,分析其微观力学机制,进而得出运移规律。针对区域离散分布型油藏,建立了油团喉道模型,数值模拟了在地震冲击波作用下,储层中的宏观小尺度分散型油团穿过喉道发生迁移的过程,得出该类型油团发生迁移所需外力加速度的阈值与喉道结构参数之间的关系;并在此基础上对比分析了理想状态(无黏滞阻力)和存在黏滞阻力两种不同情形下的结果,做出了外力加速度阈值与喉道半径之间的曲线图,为深入研究外力促进油气运移提供了理论支持。
The oil blob-throat model was proposed for discrete distribution oil deposit.Based upon the model system,the numerical simulation of migration of discrete oil blobs driven was excused by pulse seismic waves.Relationships between the threshold values of accelerations for oil blobs migration and the structural parameters were derived.A contrastive analysis of two cases that ideal state and viscous state was proposed.The curve graph of acceleration thresholds and radius of throats is derived,it can provide theoretical supports for researching on forced oil migration.
The oil blob-throat model was proposed for discrete distribution oil deposit.Based upon the model system,the numerical simulation of migration of discrete oil blobs driven was excused by pulse seismic waves.Relationships between the threshold values of accelerations for oil blobs migration and the structural parameters were derived.A contrastive analysis of two cases that ideal state and viscous state was proposed.The curve graph of acceleration thresholds and radius of throats is derived,it can provide theoretical supports for researching on forced oil migration.
引文
1 李明诚.石油与天然气运移研究综述.石油勘探与开发,2000;27(4):3—10Li M C.An overview of hydrocarbon migration research.Petroleum Exploration and Development,2000;27(4):3—10
2 李大伟.试论天然地震与油气成藏和开发的关系.新疆石油地质,2004;24(1):19—24Li D W.A Discussion on Earthquakes versus Hydrocarbon Accumulation and Exploitation.Xinjiang Petroleum Geology,2004;24(1):19 —24
3 华保钦.构造应力场,地震泵和油气运移.沉积学报,1995;13(2):77—85Hua B Q.Stress field,seismic pumping and oil-gas migration.Acta Sedimentologica Sinica,1995;13(2):77—85
4 龚再升,杨甲明.油气成藏动力学及油气运移模型.中国海上油气(地质),1999;13(4):235—239Gong Z S,Yang J M.Migration modles and pool-forming dynamics.China Offshore Oil and Gas(Geology),1999;13(4):235—239
5 Bao Ci.Natural gas geology.Beijing:Science Press,1988
6 Beresnev I A.Theory of vibratory mobilization on non-wetting fluids Entrapped in pore constrictions.Geophysics,2006;71(6):47—56
7 Diane I,Baker M R,Luo M,et al.The not so simple relationship between seismicity and oil production in the Permian Basin,west Texas.Pure&Applied Geophysics,1992;139(3—4):481—506
8 Pride S R,Seismic stimulation for enhanced oil recovery.Geophysics,2008;73(5):23—35
9 Iassonov P P.A model for enhanced fluid percolation in porous media by application of low-frequency elastic waves.Journal of Geophysical Research,2003;108(B3):2138
10 Hooper E C D.Fluid migration along growth faults in compacting sediments.Journal of Pet roleum Geology,1991;4(2):161—180
11 Rutledge J T.Reservoir characterization using oil production induced microseismicity,Clinton County,Kentucky.Tectonophysics,1998;289:129—152
12 Beresnev I,Gaul W,Vigil R D.Thickness of residual wetting Film in liquid-liquid displacement.Physical Review E 84,2011;026327:1—8
2 李大伟.试论天然地震与油气成藏和开发的关系.新疆石油地质,2004;24(1):19—24Li D W.A Discussion on Earthquakes versus Hydrocarbon Accumulation and Exploitation.Xinjiang Petroleum Geology,2004;24(1):19 —24
3 华保钦.构造应力场,地震泵和油气运移.沉积学报,1995;13(2):77—85Hua B Q.Stress field,seismic pumping and oil-gas migration.Acta Sedimentologica Sinica,1995;13(2):77—85
4 龚再升,杨甲明.油气成藏动力学及油气运移模型.中国海上油气(地质),1999;13(4):235—239Gong Z S,Yang J M.Migration modles and pool-forming dynamics.China Offshore Oil and Gas(Geology),1999;13(4):235—239
5 Bao Ci.Natural gas geology.Beijing:Science Press,1988
6 Beresnev I A.Theory of vibratory mobilization on non-wetting fluids Entrapped in pore constrictions.Geophysics,2006;71(6):47—56
7 Diane I,Baker M R,Luo M,et al.The not so simple relationship between seismicity and oil production in the Permian Basin,west Texas.Pure&Applied Geophysics,1992;139(3—4):481—506
8 Pride S R,Seismic stimulation for enhanced oil recovery.Geophysics,2008;73(5):23—35
9 Iassonov P P.A model for enhanced fluid percolation in porous media by application of low-frequency elastic waves.Journal of Geophysical Research,2003;108(B3):2138
10 Hooper E C D.Fluid migration along growth faults in compacting sediments.Journal of Pet roleum Geology,1991;4(2):161—180
11 Rutledge J T.Reservoir characterization using oil production induced microseismicity,Clinton County,Kentucky.Tectonophysics,1998;289:129—152
12 Beresnev I,Gaul W,Vigil R D.Thickness of residual wetting Film in liquid-liquid displacement.Physical Review E 84,2011;026327:1—8
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