泥页岩储层各向异性正演模拟与属性分析
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摘要
当前泥页岩油气藏的勘探取得了较大的进展,但仍处于探索阶段。以渤南洼陷沙三段泥页岩储层为例,在各向异性参数和裂缝参数分析的基础上,进行了各向异性弹性波场数值模拟,取得了较好的模拟效果。为了探索泥页岩裂缝型储层的预测方法,基于地震波场模拟数据,对甜心属性(振幅与频率的复合属性)、吸收属性等进行了提取和分析,认为利用这两类属性能够对泥页岩裂缝型储层进行有效预测,为今后该类储层的叠后地震属性预测指出了方向。
Shale oil and gas reservoirs have made great progress in exploration at present.But they are still at the exploratory stage.Taking shale reservoirs of Sha-3 member in Bonan sag for example,based on the analysis of anisotropy parameters and fracture parameters,anisotropic elastic wave field numerical simulation was carried out to obtain better simulation results.In order to explore the prediction methods of fractured shale reservoir,based on seismic wave field simulation data,sweetheart attribute(the composite attributes of the amphtude and frequency),the absorption attribute and so on were extracted and analyzed to obtain the thought that using these two types of attributes can effectively forecast fractured shale reservoirs.It pointed out the direction for the post-stack seismic attributes prediction of such reservoirs.
Shale oil and gas reservoirs have made great progress in exploration at present.But they are still at the exploratory stage.Taking shale reservoirs of Sha-3 member in Bonan sag for example,based on the analysis of anisotropy parameters and fracture parameters,anisotropic elastic wave field numerical simulation was carried out to obtain better simulation results.In order to explore the prediction methods of fractured shale reservoir,based on seismic wave field simulation data,sweetheart attribute(the composite attributes of the amphtude and frequency),the absorption attribute and so on were extracted and analyzed to obtain the thought that using these two types of attributes can effectively forecast fractured shale reservoirs.It pointed out the direction for the post-stack seismic attributes prediction of such reservoirs.
引文
[1]吴国忱.各向异性介质地震波传播与成像[M].东营:中国石油大学出版社,2006:13-21.
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[6]Alterman Z,Karal F C.Propagation of elastic wave in layered media by finite-difference method[J].Bull Seism Soc Am,1968,58(1):367-398.
[7]张永刚.地震波场数值模拟方法[J].石油物探,2003,42(2):143-148.
[8]朱多林,白超英.基于波动方程理论的地震波场数值模拟方法综述[J].地球物理学进展,2011,26(5):1588-1599.
[9]吴国忱,王华忠.波场模拟中的数值频散分析与校正策略[J].地球物理学进展,2005,20(1):58-65.
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[11]孙成禹,李胜军,倪长宽,等.波动方程变网格步长有限差分数值模拟[J].石油物探,2008,47(2):123-127.
[12]黄超,董良国.可变网格与局部时间步长的交错网格高阶差分弹性波模拟[J].地球物理学报,2009,52(11):2 870-2 878.
[13]Spencer T W.Seismic wave attenuation in nonresolvable cyclic stratification[J].Geophysics,1977,42(5):939-949.
[14]辛可锋,李振春,王永刚,等.地层等效吸收系数反演[J].石油物探,2001,40(4):14-20.
[15]李显贵,甘其刚.川西坳陷致密非均质储层地震识别技术[J].特种油气藏,2004,11(5):12-34.
[2]Crampin S.A review of wave motion in anisotompic and cracked elastic media[J].Wave Motion,1981,3(4):343-391.
[3]Thomsen L.Weak elastic anisotropy[J].Geophysics,1986,51(10):1954-1966.
[4]Bakulin A,Grechka V,Tsvankin I.Estimation of fracture parameters of HTI media from surface P and PS data[C].SEG 69th Annual International Meeting,Expanded Abstracts,1999.
[5]杨光海,王必金,郭建伟.利用地震多波NMO速度信息预测裂缝的方法[J].天然气地球科学,2005,16(5):647-649.
[6]Alterman Z,Karal F C.Propagation of elastic wave in layered media by finite-difference method[J].Bull Seism Soc Am,1968,58(1):367-398.
[7]张永刚.地震波场数值模拟方法[J].石油物探,2003,42(2):143-148.
[8]朱多林,白超英.基于波动方程理论的地震波场数值模拟方法综述[J].地球物理学进展,2011,26(5):1588-1599.
[9]吴国忱,王华忠.波场模拟中的数值频散分析与校正策略[J].地球物理学进展,2005,20(1):58-65.
[10]朱生旺,曲寿利,魏修成,等.变网格有限差分弹性波方程数值模拟方法[J].石油地球物理勘探,2007,42(6):634-639.
[11]孙成禹,李胜军,倪长宽,等.波动方程变网格步长有限差分数值模拟[J].石油物探,2008,47(2):123-127.
[12]黄超,董良国.可变网格与局部时间步长的交错网格高阶差分弹性波模拟[J].地球物理学报,2009,52(11):2 870-2 878.
[13]Spencer T W.Seismic wave attenuation in nonresolvable cyclic stratification[J].Geophysics,1977,42(5):939-949.
[14]辛可锋,李振春,王永刚,等.地层等效吸收系数反演[J].石油物探,2001,40(4):14-20.
[15]李显贵,甘其刚.川西坳陷致密非均质储层地震识别技术[J].特种油气藏,2004,11(5):12-34.
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