川西坳陷回龙地区沙溪庙组油气富集性预测技术
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摘要
四川回龙地区川西坳陷沙溪庙组含气丰富,储层多以河道及叠置河道砂体为主。但是由于河道频繁变迁,形成的储集体单层厚度小,纵向上呈砂泥岩互层,横向变化快,非均质性强,所以储层展布及横向连续性难以准确预测。对此,首先通过分析古沉积环境,确定沉积相特征,建立区域储层的地球物理响应模式。然后运用地震属性分析及像素成像体分频,结合钻井资料,对储层进行平面展布、空间展布和非均质性的预测。最后结合含气性检测,预测出储层的含气富集性,为该区寻找砂体气藏提供了依据。
The gas resources are rich in group Shaximiao of west Sichuan depression,Sichuan Huilong area.The main type of reservoir is channel and superimposed channel.As the river changed frequently,characteristics of reservoir is small single-layer thickness,interbedded sandy and shaly layers in vertical,fast changing in lateral and strong heterogeneity.Firstly,we determine the sedimentary facies,establish the model of geophysical response of reservoir by analyzing the palaeosedimentary environment.Then,with well drilling data,to predict the plane distribution and spatial distribution of reservoir by using of seismic attribute analysis technology,body image pixel separate frequency technology.At last,based on the result of gas detection,we can predict enrichment of the gas reservoirs,and provide a basis to find gas sand bodies in the area.
The gas resources are rich in group Shaximiao of west Sichuan depression,Sichuan Huilong area.The main type of reservoir is channel and superimposed channel.As the river changed frequently,characteristics of reservoir is small single-layer thickness,interbedded sandy and shaly layers in vertical,fast changing in lateral and strong heterogeneity.Firstly,we determine the sedimentary facies,establish the model of geophysical response of reservoir by analyzing the palaeosedimentary environment.Then,with well drilling data,to predict the plane distribution and spatial distribution of reservoir by using of seismic attribute analysis technology,body image pixel separate frequency technology.At last,based on the result of gas detection,we can predict enrichment of the gas reservoirs,and provide a basis to find gas sand bodies in the area.
引文
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[2]李智武,刘树根,林杰,等.川西坳陷构造格局及其成因机制[J].成都理工大学学报:自然科学学报,2009,36(6):645.
[3]蔡开平,杨跃明,王应荣,等.川西地区侏罗系气藏类型与勘探[J].天然气工业,2001,21(2):9.
[4]陈雨红,杨长春,曹齐放,等.几种时频分析方法比较[J].地球物理学进展,2006,21(4):1180.
[5]段文棠,张虹.新场气田J3P含气砂体预测研究[J].矿物岩石,1999,19(2):37.
[6]范洪军,李军,肖毓祥,等.地震分频技术在扇三角洲演化过程研究中的应用[J].石油与天然气地质,2007,28(5):682.
[7]曹卿荣,李佩,孙凯,等.应用地震属性分析技术刻画河道砂体[J].岩性油气藏,2007,19(2):93.
[8]吴朝荣,蒋晓红.河道砂体识别技术[J].石油物探,2003,42(2):204.
[9]毛凤鸣,陈安定,严元锋,等.苏北盆地复杂小断块油气成藏特征及地震识别技术[J].石油与天然气地质,2006,27(6):827.
[10]赵政璋,赵贤正,王英民,等.储层地震预测理论与实践[M].北京:科学出版社,2005.
[11]GERALD D K.Fundamentals of 3-D seismic visual-ization[M].The leading edge,1999.
[12]张哨楠.致密天然气砂岩储层:成因和讨论[J].石油与天然气地质,2008,29(1):1.
[13]BEN E.Law basin-centered gas systems[J].AAPGBulletin,2002,86(11):78.
[14]王允诚.油气储层评价[M].北京:石油工业出版社,1999.
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