| A set of lacustrine turbidite fan deposit was developed in the Paleogene Shahejie Formation in the south of
Qikou Depression, Bohai Bay Basin. The sandstone reservoir is characterized by small distribution range, rapid change
and thin interbedding of sandstone and mudstone. Based on the recognition of sequence stratigraphic framework and
reservoir genetic type, combined with the vertical fine logging data and lateral intensive seismic data, the “three-step”
seismic reservoir prediction was comprehensively carried out, including seismic attribute analysis, well logging
constrained inversion and geostatistical inversion. It is shown that sandbodies are superimposed and distributed
continuously along with the direction of sediment source, but change rapidly and are mostly lenticular while being
perpendicular to the direction of sediment source. Under the control of the footwall in the south of the turbidite fan, the
sandbodies in the south are generally thick, and the turbidite channel sandbodies are also relatively thick. The application
effect shows that the “three step” reservoir comprehensive prediction technology of seismic attribute analysis, well
logging constrained inversion and geostatistical inversion, is more suitable for fine reservoir prediction under the condition
of sparse well network and large well spacing. |
