基于模型地震反演储层预测技术的应用——以牛圈湖油田西山窑组为例
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摘要
牛圈湖油田西山窑组(J2x)属于低孔、低渗、低压的"三低"油藏,储层非均质性强,储层预测尤为重要。根据测井曲线的对比及交会分析,选择了自然伽马曲线和声波时差曲线来构建具有声波量纲的拟声波曲线,采用宽带约束模拟退火非线性全局寻优反演方法进行了储层预测。通过3种测井资料(10%地震和90%测井、30%地震和70%测井、50%地震和50%测井)约束程度对比,发现使用10%地震和90%测井参与程度的反演结果精度最高,表明基于模型的地震反演技术可获得高分辨率的地层波阻抗资料,并能有效地区分储层与非储层。根据储层预测结果与实钻结果的对比,分析了误差原因和存在的问题。
The reservoir of Xishanyao Formation(J2 x) in Niuquanhu Oilfield is characterized by low porosity,low permea-bility,low pressure and strong heterogeneity,so reservoir prediction is particularly important.Through contrast and analysis of well logs,natural gamma ray curve and sonic log curve were selected to build up a sonic-dimensional pseudo-acoustic curve,and broadband constrained simulated annealing nonlinear global optimization inversion method was applied to carry out reservoir prediction.Through comparing three degrees of constraint of logging data(① 10% seismic and 90% logging,② 30% seismic and 70% logging,③ 50% seismic and 50% logging),it is found that the inversion result from using 10% seismic and 90% logging is of the highest accuracy.It shows that using seismic inversion technique based on model can obtain high-resolution impedance information,and effectively distinguish reservoir from non-reservoir.According to the comparison between predicted and actual drilling results,the error causes and problems were analyzed.
The reservoir of Xishanyao Formation(J2 x) in Niuquanhu Oilfield is characterized by low porosity,low permea-bility,low pressure and strong heterogeneity,so reservoir prediction is particularly important.Through contrast and analysis of well logs,natural gamma ray curve and sonic log curve were selected to build up a sonic-dimensional pseudo-acoustic curve,and broadband constrained simulated annealing nonlinear global optimization inversion method was applied to carry out reservoir prediction.Through comparing three degrees of constraint of logging data(① 10% seismic and 90% logging,② 30% seismic and 70% logging,③ 50% seismic and 50% logging),it is found that the inversion result from using 10% seismic and 90% logging is of the highest accuracy.It shows that using seismic inversion technique based on model can obtain high-resolution impedance information,and effectively distinguish reservoir from non-reservoir.According to the comparison between predicted and actual drilling results,the error causes and problems were analyzed.
引文
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[17]赵万金,张巧凤,苏勤.莫里青断陷地震储层特征及预测技术研究[J].岩性油气藏,2010,22(4):100-103.
[2]许辉群,桂志先.利用测井约束地震反演预测砂体展布——以YX地区砂四段三砂组砂体为例[J].天然气地球科学,2006,17(4):547-551.
[3]傅长生,马秀兰,岳伏生.储层预测技术研究新进展[M].北京:石油工业出版社,1998:131-180.
[4]李国良,蔡佳,甘华军,等.南阳凹陷边界断裂带砂体反演及预测[J].岩性油气藏,2010,22(2):99-102.
[5]姚逢昌,甘利灯.地震反演的应用与限制[J].石油勘探与开发,2000,27(2):53-56.
[6]曹志军.特征测井曲线重构技术在薄储层反演中的应用[J].内蒙古石油化工,2009,(10):207-210.
[7]周建宇.埕岛油田埕北246井区储层反演方法与效果[J].油气地质与采收率,2005,12(3):45-47.
[8]姚永君.测井资料在储层反演中的应用[J].测井技术,2005,29(4):349-352.
[9]杨培杰,印兴耀.地震子波提取方法综述[J].石油地球物理勘探,2008,43(1):123-128.
[10]王西文,石兰亭,雍学善,等.地震波阻抗反演方法研究[J].岩性油气藏,2007,19(3):80-88.
[11]唐立人.储层反演在曙2-7-28井区滚动勘探中的应用[J].特种油气藏,2001,8(1):30-33.
[12]李敏同,李忠权,麻成斗.地震反演约束下的敖南油田南部下白垩统黑帝庙油层砂体精细对比[J].岩性油气藏,2010,22(增刊):74-79.
[13]陈新军,汪立君,季东明.利用地震反演技术预测东濮凹陷文243井区储层[J].天然气地球科学,2003,14(5):422-424.
[14]王朝锋,汪昌贵,桂志先,等.声波曲线重构反演技术在青海油田的应用[J].断块油气田,2009,16(6):17-18.
[15]刘全新,高建虎,董雪华.储层预测中的非线性反演方法(为《岩性油气藏》创刊而作)[J].岩性油气藏,2007,19(1):8185.
[16]慎国强,王玉梅.垦71地区油藏开发中的精细储层反演研究[J].油气地球物理,2008,6(1):31-33.
[17]赵万金,张巧凤,苏勤.莫里青断陷地震储层特征及预测技术研究[J].岩性油气藏,2010,22(4):100-103.
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