TITLE:
Division and Correlation of Lacustrine Gravity Flow Reservoirs Based on High-Resolution Sequence Stratigraphic Analysis—Taking Oil Formation I of Lower Es3 in Wuhaozhuang Oilfield as an Example
AUTHORS:
Yiming Zhang, Hongliang Wang
KEYWORDS:
High-Resolution Sequence Stratigraphy, Formation I of Lower Es3, Reservoir Division and Correlation, Lacustrine Gravity Flow, Wuhaozhuang Oilfield
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.10 No.6,
June
30,
2022
ABSTRACT: The phase change of lacustrine gravity flow deposition is fast and
complex. In its reservoir division and
correlation, the isochronous problem is very important. Taking the oil
formation I of Es3 in Wuhaozhuang oilfield as an example, through the analysis of stratigraphic drilling and
logging data in the study area, according to the genetic types of
different levels of base level cycle interfaces and the characteristics of
high-resolution sequence stratigraphy, this paper subdivides the lacustrine
gravity flow oil layer of lower Es3 in Wuhaozhuang Oilfield, divides it into
four short-term base level cycle sequences, and establishes the high-resolution
isochronous stratigraphic framework of this interval. It is found that the
mid-term, short-term and ultra short-term base level cycles correspond to the
oil formation, sand layer group and single layer in the oil layer correlation
unit of the oilfield respectively. Based on this, the oil layer correlation unit of the interval is divided,
and the sublayer correlation model
is established according to the identification characteristics of the short-term base level cycle.