川西深层须家河组气藏储层预测关键技术
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摘要
探讨川西深层上三叠统须家河组气藏优质储层预测、裂缝发育带预测及含气性检测方法。针对川西新场气田须家河组气藏,在储层地震响应特征和有利沉积相带预测的基础上,利用AVO叠前同时反演预测相对优质储层的分布;采用纵横波资料联合的裂缝检测方法,进行地震属性裂缝预测、P波方位各向异性裂缝预测、横波分裂裂缝检测及离散裂缝网络建模的裂缝表征等多方法、多尺度的裂缝综合预测;利用纵波和横波联合反演进行储层的含气性预测,并形成了须家河组气藏储层预测关键技术。结果表明该技术系列可以较好地预测须家河组气藏相对高孔隙储层、裂缝发育带及含气有利区,钻井成功率从15%提高到89%。
This paper approaches the prediction ways of the high quality reservoirs and the development of fractures and the detection of gas-bearing quality in the deep Upper Triassic Xujiahe Formation gas reservoir in West Sichuan.Aiming at the Xujiahe Formation gas reservoir in West Sichuan,based on the features of seismic response and the favorable sedimentary facies distribution,the distribution of high-quality reservoir is predicted by using AVO simultaneous inversion.The joint method of P-wave and convert wave is used to predict the fractures of seismic attribute,P-wave azimuthal anisotropy,shear wave splitting and the multi-scale fractures,and model the discrete fracture net.The prediction of gas-bearing quality is finished by jointing inversion of P-wave and convert wave and then,the key technologies of reservoir prediction for the Xujiahe Formation gas reservoir are developed.Finally,the results show that those technologies can better predict the reservoirs of relative high porosity,developing fractures and the beneficial gas-bearing areas of Xujiahe Formation.The rate of drilling success is 15%~89%.
This paper approaches the prediction ways of the high quality reservoirs and the development of fractures and the detection of gas-bearing quality in the deep Upper Triassic Xujiahe Formation gas reservoir in West Sichuan.Aiming at the Xujiahe Formation gas reservoir in West Sichuan,based on the features of seismic response and the favorable sedimentary facies distribution,the distribution of high-quality reservoir is predicted by using AVO simultaneous inversion.The joint method of P-wave and convert wave is used to predict the fractures of seismic attribute,P-wave azimuthal anisotropy,shear wave splitting and the multi-scale fractures,and model the discrete fracture net.The prediction of gas-bearing quality is finished by jointing inversion of P-wave and convert wave and then,the key technologies of reservoir prediction for the Xujiahe Formation gas reservoir are developed.Finally,the results show that those technologies can better predict the reservoirs of relative high porosity,developing fractures and the beneficial gas-bearing areas of Xujiahe Formation.The rate of drilling success is 15%~89%.
引文
[1]甘其刚,许多.川西深层致密碎屑岩气藏储层预测方法[J].石油物探,2008,47(6):593-597.
[2]关文均,郭新江,智慧文.四川盆地新场气田须家河组二段储层评价[J].矿物岩石,2007,27(4):98-103.
[3]胡明毅,李士祥,魏国齐,等.川西前陆盆地上三叠统须家河组致密砂岩储层评价[J].天然气地球科学,2006,17(4):456-458.
[4]鲍祥生,尹成,赵伟,等.储层预测的地震属性优选技术研究[J].石油物探,2006,45(1):28-37.
[5]张虹,沈忠民.超致密裂缝性储层地震预测方法研究[J].成都理工大学学报:自然科学版,2008,35(2):149-157.
[6]赵爽,高倩,谯述容.川西DY地区三叠系须家河组二段地震相分析与沉积相预测[J].石油地球物理勘探,2009,44(3):341-346.
[7]李少达,鲁红英,李显贵.AVO技术在新场气田须家河组储层研究中的应用[J].天然气工业,2008,28(3):54-55.
[8]杨克明,张虹.地震三维三分量技术在致密砂岩裂缝预测中的应用[J].石油与天然气地质,2008,29(5):683-689.
[9]蔡希源,唐建明,陈本池.三维多分量地震技术在川西新场地区深层致密砂岩裂缝检测中的应用[J].石油学报,2010,31(5):737-743.
[10]甘其刚,高志平.宽方位AVA裂缝检测技术应用研究[J].天然气工业,2005,25(5):42-44.
[11]贺振华,黄德济,文晓涛.裂缝油气藏地球物理预测[M].四川:四川科学技术出版社,2007:154-168.
[12]甘其刚,唐建明,马昭军.裂缝性气藏转换波3D3C地震采集观测系统优选[J].勘探地球物理进展,2008,31(5):335-344.
[13]Chen Q,Sidney S.Seismic attribute technology forreservoir forecasting and monitoring[J].The Lead-ing Edge,1997,16(5):445-456.
[14]Ruger A.Variation of P-wave reflectivity with offsetand azimuth in anisotropic media[J].Geophysics,1998,63(3):935-947.
[15]Subhashis M,Kenneth C,Laurent M.Determina-tion of the principal directions of azimuthal anisotro-py from P-wave seismic data[J].Geophysics,1998,63(2):692-706.
[2]关文均,郭新江,智慧文.四川盆地新场气田须家河组二段储层评价[J].矿物岩石,2007,27(4):98-103.
[3]胡明毅,李士祥,魏国齐,等.川西前陆盆地上三叠统须家河组致密砂岩储层评价[J].天然气地球科学,2006,17(4):456-458.
[4]鲍祥生,尹成,赵伟,等.储层预测的地震属性优选技术研究[J].石油物探,2006,45(1):28-37.
[5]张虹,沈忠民.超致密裂缝性储层地震预测方法研究[J].成都理工大学学报:自然科学版,2008,35(2):149-157.
[6]赵爽,高倩,谯述容.川西DY地区三叠系须家河组二段地震相分析与沉积相预测[J].石油地球物理勘探,2009,44(3):341-346.
[7]李少达,鲁红英,李显贵.AVO技术在新场气田须家河组储层研究中的应用[J].天然气工业,2008,28(3):54-55.
[8]杨克明,张虹.地震三维三分量技术在致密砂岩裂缝预测中的应用[J].石油与天然气地质,2008,29(5):683-689.
[9]蔡希源,唐建明,陈本池.三维多分量地震技术在川西新场地区深层致密砂岩裂缝检测中的应用[J].石油学报,2010,31(5):737-743.
[10]甘其刚,高志平.宽方位AVA裂缝检测技术应用研究[J].天然气工业,2005,25(5):42-44.
[11]贺振华,黄德济,文晓涛.裂缝油气藏地球物理预测[M].四川:四川科学技术出版社,2007:154-168.
[12]甘其刚,唐建明,马昭军.裂缝性气藏转换波3D3C地震采集观测系统优选[J].勘探地球物理进展,2008,31(5):335-344.
[13]Chen Q,Sidney S.Seismic attribute technology forreservoir forecasting and monitoring[J].The Lead-ing Edge,1997,16(5):445-456.
[14]Ruger A.Variation of P-wave reflectivity with offsetand azimuth in anisotropic media[J].Geophysics,1998,63(3):935-947.
[15]Subhashis M,Kenneth C,Laurent M.Determina-tion of the principal directions of azimuthal anisotro-py from P-wave seismic data[J].Geophysics,1998,63(2):692-706.
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