Sedimentary characteristics and favorable reservoir prediction of Longtan Formation in Huangqiao area, Jiangsu Province
-
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。Abstract: 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.
-
Key words:
- seismic inversion /
- delta front /
- reservoir prediction /
- Longtan Formation /
- Huangqiao area /
- Jiangsu Province
-
[1] 夏在连.下扬子黄桥地区上古生界油气成藏研究[J].石油实验地质,2011,33(5):505-508. [2] 佘晓宇,徐宏节,何治亮.江苏下扬子区中、古生界构造特征及其演化[J].石油与天然气地质,2004,25(2):226-230. [3] 张淮,郭念发.苏北盆地黄桥CO2气田储集层裂隙特征[J].江苏地质,2004,28(4):201-206. [4] 王文耀.苏浙皖地区的龙潭组[J].地层学杂志,1993,17(3):232-236. [5] 王文耀,曹家玉,郭光,等.江苏龙潭组致密砂岩孔隙结构和因子分析[J].石油实验地质,1996,16(2):164-171. [6] 陈安定,刘东鹰,刘子满.江苏下扬子区海相中、古生界烃源岩晚期生烃的论证与定量研究[J].海相油气地质,2001,6(4):27-33. [7] 吉丛伟,李志能,彭正奇,等.湘中龙潭组北型沉积相及聚煤特征[J].中国煤炭地质,2009,21(1):9-12. [8] 杨朝荣.苏南地区龙潭组的分区及对比[J].江苏地质,1991(4):209-212. [9] 秦顺亭.江苏下扬子区中—古生界的成藏条件及勘探思路[J].海相油气地质,1998,3(1):6-10. [10] 陈安定.江苏下扬子区下古生界源岩二次生烃[J].南方油气,2006,19(1):8-14. [11] 潘继平,乔德武,李世臻,等.下扬子地区古生界页岩气地质条件与勘探前景[J].地质通报,2011,30(S1):337-343. [12] 王文耀.苏浙皖地区茅口阶和上二叠统沉积相[J].岩相古地理,1998,18(1):36-42. [13] Stephen J H.Inversion-based thickness determination[J].The Leading Edge,2005,25(5):477-480. [14] 杨诚,戴建全,黎从军.多井约束InverMod反演在四川新场气田含气砂体预测中的应用[J].成都理工学院学报,1999,26(2):149-153. [15] 丁次乾.矿场地球物理[M].东营:中国石油大学出版社,2008. [16] Brown A R.Seismic attributes and their classification[J].The Leading Edge,1996,15(10):1090. [17] Chen Q C,Steve S.Seismic attribute technology for reservoir forecasting and monitoring[J].The Leading Edge,1997,16(5):445-456. -
计量
- 文章访问数: 2638
- HTML全文浏览量: 143
- PDF下载量: 1092
- 被引次数: 0
下载:
苏公网安备32021102000780号