Lithologic Reservoirs ›› 2023, Vol. 35 ›› Issue (5): 100-107.doi: 10.12108/yxyqc.20230510

• PETROLEUM EXPLORATION • Previous Articles     Next Articles

Architecture characterization of meandering river reservoirs of lower Ming huazhen Formation of Neogene in Penglai 19-3 oilfield，Bohai Sea

XU Zhongbo, WANG Libing, SHEN Chunsheng, CHEN Mingyang, GAN Liqin   

  1. Tianjin Branch of CNOOC China Limited, Tianjin 300452, China
  • Received:2022-09-05 Revised:2022-10-15 Online:2023-09-01 Published:2023-09-28

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Abstract: It is important to carry out fine characterization of different levels of reservoir architecture units in the composite sand bodies for the optimization of the development plan of the lower Minghuazhen Formation in Penglai 19-3 oilfield in Bohai Sea. The cores，logging and 3D seismic data were used to characterize fifth to thirdorder architecture units based on multi-attribute intelligent fusion in the second sublayer of Ⅳ oil group of lower Minghuazhen Formation in the third region of Penglai 19-3 oilfield. The results show that：（1）It can be divided into different levels of reservoir architecture units such as single meander belts， single point bar sand body and single lateral deposit in Penglai 19-3 oilfield.（2）Through the optimization of seismic attributes， the maximum amplitude， reflection intensity and relative impedance are more sensitive to reservoir response. The neural network multi-attribute fusion based on parameter supervision further improves the accuracy and reliability of reservoir prediction.（3）A single meander belt with fifth-order configuration unit is developed in the study area， which is narrow in the middle and wide at both ends in the north-south direction. The fourth-order architecture unit of single point bar is distributed in a string of beads， and the point bars are cut and transformed with each other. The lateral deposit is positive rhythm， and the dip angle of the lateral deposit is 2°-5°.（4）The geometric shape， scale and structure of the configuration units of different genetic types are relevant， which is of great significance for adjusting the well location， improving the injection-production well pattern and improving the efficiency of oilfield development.

Key words: multi-attribute fusion, meandering river, point bar, multi-order, architecture characterization, lower Minghuazhen Formation, Neogene, Penglai 19-3 oilfield, Bohai Sea

CLC Number: 

  • TE122.2
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