随钻地质建模在X油田水平井设计与实施中的应用
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摘要
随着渤海各油田开发阶段的不断深入,水平井技术已成为提高储量动用程度、提高采收率和单井产能的有效手段。但由于海上油田井距较大、井孔资料少,水平井的设计与实施工作主要依赖于地震资料。鉴于地震资料的品质和分辨率的局限性,提出以建立在综合地质研究基础上的精细三维地质模型作为地质导向,指导水平井设计与实施。以X油田为例,在建模中,依据随钻过程中使用自然伽马测井指示储层与泥岩隔夹层的特点,创新使用遗传反演方法对储层参数进行反演计算,并在遗传反演数据体的约束下模拟自然伽马的空间分布,从而建立自然伽马模型及砂、泥岩相模型,并借助三维可视化技术,确保水平井的顺利实施和良好的实施效果。
With the deepening of development stage in Bohai Oilfields,horizontal well technology has become the effective means for enhancing the producing degree of reserves,enhancing oil recovery and single well production.However,due to the large well spacing and few borehole date in offshore oilfields,design and implementation of horizontal wells depended mainly on seismic data.But in view of the limitation in quality and resolution of seismic data,it was proposed that a high precise 3D geological model based on comprehensive geological research was established for geo-steering to guide the design and implementation of horizontal wells.By taking X Oilfield for example,in the modeling,the characteristics of gamma ray logging is used for indicating reservoir and mudstone barrier in drilling and genetic inversion method is creatively used for inverse calculation of reservoir parameters.And under constraint of genetic inversion data volume,spatial distribution of natural gamma ray is simulated to set up the model of natural gamma ray and sand-shale,and 3D visualization technology is deployed to ensure smooth implementation and good implementation effect in horizontal wells.
With the deepening of development stage in Bohai Oilfields,horizontal well technology has become the effective means for enhancing the producing degree of reserves,enhancing oil recovery and single well production.However,due to the large well spacing and few borehole date in offshore oilfields,design and implementation of horizontal wells depended mainly on seismic data.But in view of the limitation in quality and resolution of seismic data,it was proposed that a high precise 3D geological model based on comprehensive geological research was established for geo-steering to guide the design and implementation of horizontal wells.By taking X Oilfield for example,in the modeling,the characteristics of gamma ray logging is used for indicating reservoir and mudstone barrier in drilling and genetic inversion method is creatively used for inverse calculation of reservoir parameters.And under constraint of genetic inversion data volume,spatial distribution of natural gamma ray is simulated to set up the model of natural gamma ray and sand-shale,and 3D visualization technology is deployed to ensure smooth implementation and good implementation effect in horizontal wells.
引文
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[2]霍春亮,古莉,赵春明,等.基于地震、测井和地质综合一体化的储层精细建模[J].石油学报,2007,28(6):66～71.
[3]张岚,赵春明,霍春亮,等.随钻地质建模一体化综合研究及应用[J].石油钻采工艺,2009,31(增刊1):21～25.
[4]吴胜和,刘英,范峥,等.应用地质和地震信息进行三维沉积微相随机建模[J].古地理学报,2003,5(4):439～446.
[5]沈章洪,梁雪梅,田立新.随机模拟技术在QHD32-6油田油藏地质模型随钻调整中的应用[J].中国海上油气(地质),2001,15(6):405～412.
[5]王晖.综合应用地震、地质和测井资料预测储层分布[J].中国海上油气(地质),2001,15(2):135～139.
[6]尹成,陈涛,黄小革,等.综合遗传算法及其在地震波阻抗反演中的应用[J].西南石油学院学报,1999,21(2):43～46.
[7]张伟.油藏地质模型及其动态实时跟踪方法研究[D].东营:中国石油大学(华东),2010.
[8]周明晖.储层地质模型的建立及动态实时跟踪研究[D].东营:中国石油大学(华东),2009.
[9]张伟,林承焰,周明晖,等.地质模型动态更新方法在关家堡油田的应用[J].石油勘探与开发,2010,37(2):220～225.
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