薄窄砂体地震跟踪预测方法
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摘要
大庆长垣西部地区葡萄花油层主要发育水下分流河道和小片席状砂,砂体厚度1～3m,横向变化快,分布零散,地震储层预测精度受到限制,给油藏评价和开发带来较大风险。为了提高薄窄砂体预测精度,以古龙油田为例,提出了分步逐级井震联合反演方法:以岩石物理响应特征分析为基础,优选反演方法,优化流程参数,不断增加滚动井数,通过5批161口开发井的优选及调整,砂体预测精度不断提高,确保了该油田初步开发方案实施效果,形成了可以推广应用的滚动预测跟踪调整的工作流程。
The subsea channel sand and sheet sand,in the west of Daqing placanticline,play the most important role in the oil layer of Putaohua.The sand reservoir has the characteristic of chare distribution,1-3 m thick,which varies fast horizontally.So the prediction of sand reservoir by seismic has a limit of resolution.Therefore the reservoir evaluation and development has a risk of uncertainty.In order to improve the prediction accuracy of thin narrow sand body,taking Gulong oilfield as an example,we created the stepwise well-seismic joint tracking inversion.The method is based on petrophysical response characteristic analysis,optimizing inversion method and parameters.Continuously increasing rolling well numbers,by optimizing and adjusting five batches 161 development wells,the prediction accuracy of sand body is increased continuously,which ensures the effect of preliminary development plan of the oilfield.A set of rolling prediction and adjusting workflow is developed,which can be popularized and applied.
The subsea channel sand and sheet sand,in the west of Daqing placanticline,play the most important role in the oil layer of Putaohua.The sand reservoir has the characteristic of chare distribution,1-3 m thick,which varies fast horizontally.So the prediction of sand reservoir by seismic has a limit of resolution.Therefore the reservoir evaluation and development has a risk of uncertainty.In order to improve the prediction accuracy of thin narrow sand body,taking Gulong oilfield as an example,we created the stepwise well-seismic joint tracking inversion.The method is based on petrophysical response characteristic analysis,optimizing inversion method and parameters.Continuously increasing rolling well numbers,by optimizing and adjusting five batches 161 development wells,the prediction accuracy of sand body is increased continuously,which ensures the effect of preliminary development plan of the oilfield.A set of rolling prediction and adjusting workflow is developed,which can be popularized and applied.
引文
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[2]王西文,刘全新,苏明军,等.滚动勘探开发阶段精细储集层预测技术[J].石油勘探与开发,2002,29(6):51-53,71.Wang Xi-wen,Liu Quan-xin,Su Ming-jun,et al.Precision Predicting Reservoirs on the Stages ofProgressive of Exploration and Development[J].Petroleum Exploration and Development,2002,29(6):51-53,71.
[3]张利萍,陈轩,张昌民.河流相层序地层及岩性油气藏油气富集规律[J].吉林大学学报:地球科学版,2010,40(5):1004-1010.Zhang Li-ping,Chen Xuan,Zhang Chang-min.Sequence Stratigraphy and Discipline of LithologicReservoirs for Hydrocarbon Accumulation in FluvialFacies[J].Journal of Jilin University:Earth ScienceEdition,2010,40(5):1004-1010.
[4]王西文.在相对波阻抗约束下的多井测井参数反演方法和应用[J].石油地球物理勘探,2004,39(3):291-299.Wang Xi-wen.Inversion of Multi-Logging ParametersUnder Constrain of Relative Wave Impedance DataVolume and Application[J].Oil GeophysicalProspecting,2004,39(3):291-299.
[5]秦月霜,郭海晓,陈友福.变差函数对地震反演精度的影响[J].大庆石油学院学报,2009,33(5):37-39.Qin Yue-shuang,Guo Hai-xiao,Chen You-fu.Effectof Variogram on Seismic Inversion Accuracy[J].Journal of Daqing Petroleum Institute,2009,33(5):37-39.
[6]张永刚.地震波阻抗反演技术的现状和发展[J].石油物探,2002,41(4):385-390.Zhang Yong-gang.The Present and Future of WaveImpedance Inversion Technique[J].GeophysicalProspecting for Petroleum,2002,41(4):385-390.
[7]陈殿元.随机地震反演技术在WC13-1油田随机地质建模中的应用[J].中国海上油气,2004,16(4):250-253.Chen Dian-yuan.An Application of Seismic StochasticInversion Technique to Geological Modeling in WC13-1Oilfield[J].China Offshore Oil and Gas,2004,16(4):250-253.
[8]韩小俊,赵宪生,王建民.波阻抗反演结果的影响因素分析[J].大庆石油地质与开发,2005,24(4):92-93.Han Xiao-jun,Zhao Xian-sheng,Wang Jian-min.Analysis of Influential Factors for Wave ImpedanceInversion Results[J].Petroleum Geology&OilfieldDevelopment in Daqing,2005,24(4):92-93.
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