川东建南地区石炭系地震储层预测
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摘要
川东建南地区上石炭统黄龙组残余厚度一般在0～30 m,岩性以白云岩、石灰岩和角砾岩为主,且以前两类的储集物性较好。白云岩类是工区石炭系最重要的储集层,在白云岩类储层中又以针孔白云岩最好;石灰岩类储层中以角砾状灰岩较好。利用三维地震资料所作的属性定量分析、波阻抗反演及厚度预测等储层预测工作表明,黄龙组储层较围岩具有高阻抗的特点,其中物性最好的针孔白云岩表现为高阻抗背景下的低阻抗特征,物性较差的角砾白云岩表现为高阻抗特征。储层的测井响应特征及地震响应特征分析发现,当地震剖面存在双强相位(双轨特征)时,黄龙组地层存在,而当地震剖面呈现单轨特征时,则黄龙组地层不存在;地震振幅强弱与黄龙组厚度密切相关。利用地震属性及波阻抗反演技术同时预测储层厚度,其结果与实钻结果相当吻合。
The Upper Carboniferous Huanglong Formation is generally up 0～30m in residual thickness in Jiangnan area,the eastern part of Sichuan Basin.Dolostone,limestone and breccia are common in Huanglong Formation,among which the formers are of better reservoir property.The dolostone comprises the most important reservoir in Carboniferous strata.Pinhole dolostone is of the best reservoir property in the dolostone reservoir while brecciated limestone is good in limestone reservoir.Based on the attribute quantitative analysis,wave impedance inversion and thickness prediction from 3-D seismic data,it is indicated that the Upper Carboniferous Huanglong reservoir rock is characterized by higher impedance than its wall rock.In the Huanglong reservoir,the pinhole dolostone is characterized by low impedance under the background of high impedance while the breccia dolostone shows high impedance.The analysis of log and seismic response characteristics of the reservoir has shown that Huanglong Formation is present when the double strong phase occurs in seismic profiles while Huanglong Formation is not present when the single strong phase occurs,which indicates that seismic intensity is closely relative with the thickness of Huanglong Formation.The result of predicting reservoir thickness by seismic attributes and wave impedance inversion is well accorded with that by drilling.
The Upper Carboniferous Huanglong Formation is generally up 0～30m in residual thickness in Jiangnan area,the eastern part of Sichuan Basin.Dolostone,limestone and breccia are common in Huanglong Formation,among which the formers are of better reservoir property.The dolostone comprises the most important reservoir in Carboniferous strata.Pinhole dolostone is of the best reservoir property in the dolostone reservoir while brecciated limestone is good in limestone reservoir.Based on the attribute quantitative analysis,wave impedance inversion and thickness prediction from 3-D seismic data,it is indicated that the Upper Carboniferous Huanglong reservoir rock is characterized by higher impedance than its wall rock.In the Huanglong reservoir,the pinhole dolostone is characterized by low impedance under the background of high impedance while the breccia dolostone shows high impedance.The analysis of log and seismic response characteristics of the reservoir has shown that Huanglong Formation is present when the double strong phase occurs in seismic profiles while Huanglong Formation is not present when the single strong phase occurs,which indicates that seismic intensity is closely relative with the thickness of Huanglong Formation.The result of predicting reservoir thickness by seismic attributes and wave impedance inversion is well accorded with that by drilling.
引文
①方志雄,梁西文,张柏桥,等.中扬子西部震旦—三叠系储层及控制因素研究[R].江汉油田勘探开发研究院,2008:65.
[1]陈宗清.川东石炭系气藏分布规律与深化勘探[J].中国海上油气(地质),2001,15(3):182-186.
[2]郭一华.川东地区石炭系储层成岩作用与天然气成藏规律[J].西南石油学院学报,1994,16(1):1-10.
[3]郑荣才,李德敏,张哨楠.川东黄龙组天然气储层的层序地层学研究[J].沉积学报,1995,13(增刊):1-9.
[4]郑荣才,张哨楠,李德敏.川东黄龙组角砾岩成因及其研究意义[J].成都理工学院学报,1996,23(1):8-18.
[5]郑荣才,彭军,高红灿.渝东黄龙组碳酸盐岩储层的古岩溶特征和岩溶旋回[J].地质地球化学,2003,31(1):28-35.
[6]郑荣才,胡忠贵,郑超,等.渝北—川东地区黄龙组古岩溶储层稳定同位素地球化学特征[J].地学前缘,2008,15(6):303-311.
[7]王一刚,文应初,刘志坚.川东石炭系碳酸盐岩储层孔隙演化中的古岩溶和埋藏溶解作用[J].天然气工业,1996,16(6):18-24.
[8]李淳.川东地区上石炭统碳酸盐岩成岩作用[J].石油大学学报:自然科学版,1998,22(5):19-22.
[9]胡忠贵,郑荣才,文华国,等.川东邻水—渝北地区石炭系黄龙组白云岩成因[J].岩石学报,2008,24(6):1369-1378.
[10]文华国,郑荣才,沈忠民,等.四川盆地东部黄龙组古岩溶地貌研究[J].地质论评,2009,55(6):816-827.
[11]秦军,葛兰,陈玉明,等.川东建南地区飞仙关组地震储层预测[J].海相油气地质,2011,16(2):9-17.
[1]陈宗清.川东石炭系气藏分布规律与深化勘探[J].中国海上油气(地质),2001,15(3):182-186.
[2]郭一华.川东地区石炭系储层成岩作用与天然气成藏规律[J].西南石油学院学报,1994,16(1):1-10.
[3]郑荣才,李德敏,张哨楠.川东黄龙组天然气储层的层序地层学研究[J].沉积学报,1995,13(增刊):1-9.
[4]郑荣才,张哨楠,李德敏.川东黄龙组角砾岩成因及其研究意义[J].成都理工学院学报,1996,23(1):8-18.
[5]郑荣才,彭军,高红灿.渝东黄龙组碳酸盐岩储层的古岩溶特征和岩溶旋回[J].地质地球化学,2003,31(1):28-35.
[6]郑荣才,胡忠贵,郑超,等.渝北—川东地区黄龙组古岩溶储层稳定同位素地球化学特征[J].地学前缘,2008,15(6):303-311.
[7]王一刚,文应初,刘志坚.川东石炭系碳酸盐岩储层孔隙演化中的古岩溶和埋藏溶解作用[J].天然气工业,1996,16(6):18-24.
[8]李淳.川东地区上石炭统碳酸盐岩成岩作用[J].石油大学学报:自然科学版,1998,22(5):19-22.
[9]胡忠贵,郑荣才,文华国,等.川东邻水—渝北地区石炭系黄龙组白云岩成因[J].岩石学报,2008,24(6):1369-1378.
[10]文华国,郑荣才,沈忠民,等.四川盆地东部黄龙组古岩溶地貌研究[J].地质论评,2009,55(6):816-827.
[11]秦军,葛兰,陈玉明,等.川东建南地区飞仙关组地震储层预测[J].海相油气地质,2011,16(2):9-17.
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