准噶尔盆地中部4区块地层压力预测方法及应用
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摘要
异常地层压力是含油气盆地普遍存在的一种现象,对油气的生成、运移、聚集和保存具有重要的作用.准噶尔盆地中部4区块经钻探证实广泛存在异常地层压力,且具有超压成因机制复杂的特征.针对研究区的问题,综合利用了基于测井资料的平衡深度法、伊顿公式法和Bowers法,钻井资料的DC指数法以及地震层速度资料的Fillippone公式法,对中部4区块的地层压力进行了预测,再结合地层实测压力资料进行了对比分析.结果表明:在基于测井资料的预测方法中,Bowers法预测的地层压力与实测压力吻合度较高,误差小,可以较为真实地反映地层压力的情况;DC指数在异常压力段会向减小的方向偏离正常压实趋势线;利用Fillippone公式法预测的地层压力经过校正后,实现了研究区地层剖面的压力模拟,模拟结果较好地反映了研究区剖面的压力特征.综合分析研究结果,在研究区取得了良好的应用效果,为钻井和油气开发提供了有力的依据.
abnormal formation pressure is a common phenomenon in petroleum basins,which plays an important role in the generation,migration,accumulation and preservation of oil and gas. Drilling in block 4 in the central Junggar basin confirms that abnormal formation pressure exists widely and is characterized by complex genetic mechanism of overpressure. In view of the problems in the study area by using the equivalent depth method,Eaton formula method and Bowers method based on logging data,DCexponent method of drilling data and Fillippone formula method of seismic interval velocity data,the formation pressure of central block 4 is predicted. Combined with the measured formation pressure data,a comparative analysis has been made.The results of analysis show that,in the prediction methods based on logging data,the predicted formation pressure with bowers method has a high consistency with the measured pressure and has less error,which can truly reflect the formation pressure;The DC exponent deviates from the normal compaction trend line in the abnormal pressure region. The formation pressure predicted by the fillippone formula method is corrected and the pressure simulation of the formation profile in the study area is realized. The simulation results reflect the pressure characteristics of the section well in the study area.Comprehensive analysis and research results show that good application results have been obtained in the study area,which provides a strong basis for drilling and oil and gas development.
abnormal formation pressure is a common phenomenon in petroleum basins,which plays an important role in the generation,migration,accumulation and preservation of oil and gas. Drilling in block 4 in the central Junggar basin confirms that abnormal formation pressure exists widely and is characterized by complex genetic mechanism of overpressure. In view of the problems in the study area by using the equivalent depth method,Eaton formula method and Bowers method based on logging data,DCexponent method of drilling data and Fillippone formula method of seismic interval velocity data,the formation pressure of central block 4 is predicted. Combined with the measured formation pressure data,a comparative analysis has been made.The results of analysis show that,in the prediction methods based on logging data,the predicted formation pressure with bowers method has a high consistency with the measured pressure and has less error,which can truly reflect the formation pressure;The DC exponent deviates from the normal compaction trend line in the abnormal pressure region. The formation pressure predicted by the fillippone formula method is corrected and the pressure simulation of the formation profile in the study area is realized. The simulation results reflect the pressure characteristics of the section well in the study area.Comprehensive analysis and research results show that good application results have been obtained in the study area,which provides a strong basis for drilling and oil and gas development.
引文
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[2]YARDLEY G S,SWARBRICK R E.Lateral transfer:a source of additional overpressure?[J].Marine&Petroleum Geology,2000,17(4):523-537.
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[4]卞从胜,柳广弟.异常地层压力的综合预测方法及其在营尔凹陷的应用[J].地质科技情报,2009,28(4):1-6.
[5]MELLO U T,KAMER G D.Development of sediment overpressure and its effect on thermal maturation:application to the gull of mexico basin[J].AAPG Bull,1996,80(9):1367-1369.
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[7]赵敏,魏长江,王树华.基于Eaton方法的地层压力预测的算法研究与实现[J].青岛大学学报(自然科学版),2017(3):86-88.
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[11]管红.井约束地震反演预测地层压力的方法:以渤海湾盆地某凹陷为例[J].天然气地球科学,2008,19(2):276-279.
[12]叶勇.三维约束Dix反演层速度方法及其应用研究[J].石油地球物理勘探,2008,43(4):443-446.
[13]查明.准噶尔盆地异常高压特征、成因及勘探意义[J].石油勘探与开发,2000,27(2):31-35.
[14]陈景阳.准噶尔盆地异常压力演化及成藏机制研究[D].武汉:中国地质大学,2007.
[15]吴海生,郑孟林,何文军,等.准噶尔盆地腹部地层压力异常特征与控制因素[J].石油与天然气地质,2017(6):1135-1146.
[16]BIOT M A.General theory of three-imensional consolidation[J].Journal of Applied Physics,2004,12(2):155-164.
[17]TERZAGHI K,PECK R B,MESRI G.Soil mechanics in engineering practice[M].3rd Edition.United State:John Wiley&Sons,1996.
[18]JORDEN J R,SHIRLEY O J.Application of drilling performance data to overpressure detection[J].Journal of Petroleum Technology,1966,18(11):1387-1394.
[19]SHAJARI M A.Modified approach to predict pore pressure using the d exponent method:an example from an oil field,south of iran[J].Liquid Fuels Technology,2013,31(10):1008-1017.
[20]FILLIPPONE W R.Estimation of formation parameters and the prediction of overpressures from seismic data[J].Seg Technical Program Expanded Abstracts,1982,1(1):482-483.
[21]GARDNER G H F,GARDNER L W,GREGORY A R.Formation velocity and density-the diagnostic basis for stratigraphic traps[J].Geophysics,1974,39(6):2085-2095.
[2]YARDLEY G S,SWARBRICK R E.Lateral transfer:a source of additional overpressure?[J].Marine&Petroleum Geology,2000,17(4):523-537.
[3]HUNT J M.Generation and migration of petroleum from abnormally pressure fluid compartments[J].AAPG Bull,1990,74(1):1-12.
[4]卞从胜,柳广弟.异常地层压力的综合预测方法及其在营尔凹陷的应用[J].地质科技情报,2009,28(4):1-6.
[5]MELLO U T,KAMER G D.Development of sediment overpressure and its effect on thermal maturation:application to the gull of mexico basin[J].AAPG Bull,1996,80(9):1367-1369.
[6]徐泽阳,王江涛,白卓立.平衡深度法预测地层压力及应用方法[J].石化技术,2016,23(11):161.
[7]赵敏,魏长江,王树华.基于Eaton方法的地层压力预测的算法研究与实现[J].青岛大学学报(自然科学版),2017(3):86-88.
[8]EATON B A.The effect of overburden stress on geopressures prediction from well logs[J].Journal of Petroleum Technology,1972,24(8):929-934.
[9]EATON B A.The equation for geopressure prediction from well logs[J].Society of Petroleum Engineers of AIME,1975,5544:1-11.
[10]BOWERS G L.Pore pressure estimation from velocity data:accounting for overpressure mechanisms besides undercompaction[J].International Journal of Rock Mechanics&Mining Sciences&Geomechanics Abstracts,1995,31(6):276.
[11]管红.井约束地震反演预测地层压力的方法:以渤海湾盆地某凹陷为例[J].天然气地球科学,2008,19(2):276-279.
[12]叶勇.三维约束Dix反演层速度方法及其应用研究[J].石油地球物理勘探,2008,43(4):443-446.
[13]查明.准噶尔盆地异常高压特征、成因及勘探意义[J].石油勘探与开发,2000,27(2):31-35.
[14]陈景阳.准噶尔盆地异常压力演化及成藏机制研究[D].武汉:中国地质大学,2007.
[15]吴海生,郑孟林,何文军,等.准噶尔盆地腹部地层压力异常特征与控制因素[J].石油与天然气地质,2017(6):1135-1146.
[16]BIOT M A.General theory of three-imensional consolidation[J].Journal of Applied Physics,2004,12(2):155-164.
[17]TERZAGHI K,PECK R B,MESRI G.Soil mechanics in engineering practice[M].3rd Edition.United State:John Wiley&Sons,1996.
[18]JORDEN J R,SHIRLEY O J.Application of drilling performance data to overpressure detection[J].Journal of Petroleum Technology,1966,18(11):1387-1394.
[19]SHAJARI M A.Modified approach to predict pore pressure using the d exponent method:an example from an oil field,south of iran[J].Liquid Fuels Technology,2013,31(10):1008-1017.
[20]FILLIPPONE W R.Estimation of formation parameters and the prediction of overpressures from seismic data[J].Seg Technical Program Expanded Abstracts,1982,1(1):482-483.
[21]GARDNER G H F,GARDNER L W,GREGORY A R.Formation velocity and density-the diagnostic basis for stratigraphic traps[J].Geophysics,1974,39(6):2085-2095.