摘要
由于印支不整合褶皱抬升,下扬子局部地区龙潭组被剥蚀,钻井揭示残余的龙潭组砂岩横向变化明显。岩心、测井和三维地震解释等综合分析表明,江苏黄桥地区龙潭组为向上变粗的三角洲前缘沉积序列,砂岩主要为三角洲前缘席状砂和分流河道沉积。测井约束波阻抗反演和孔隙度反演结果表明,较高波阻抗的砂岩平面上呈3个三角洲前缘朵状体展布。龙潭组砂岩平均孔隙度在4%～10%之间,平均孔隙度随现今埋深变浅而增大。
Effected by the fold and uplift of the Indosinian movement, the Longtan Formation in the Lower Yangtze area was locally eroded. Drillings revealed that the lateral variation of the residual Longtan Formation sandstones had changed obviously. The comprehensive analysis of cores, log curves and 3D seismic interpretations showed that the Longtan Formation was a delta front sedimentary sequence, with the characteristics of coarsening- upward, and the types of sand body were mainly frontal sheet sand and distributary channel sand in Huangqiao area, Jiangsu Province. The results of logging constrained impedance inversion and porosity inversion showed that high-impedance sandstones spread in three delta front flower-like bodies in the plane. The average porosity of the Longtan Formation sandstones ranged from 4% to 10% , and became bigger as the present depth increasing
出处
《石油实验地质》
CAS
CSCD
北大核心
2012年第4期395-399,共5页
Petroleum Geology & Experiment
基金
中国石化华东分公司勘探先导性研究项目(G1408-09-KK-0)
国家科技重大专项大型油气田与煤层气开发(2011ZX05025-006-05)联合资助
关键词
地震反演
三角洲前缘
储层预测
龙潭组
黄桥地区
江苏
seismic inversion
delta front
reservoir prediction
Longtan Formation
Huangqiao area
Jiangsu Frovlnce
