TITLE:
Paleogeomorphology of Mixed Rock Deposition in KL16 Oilfield
AUTHORS:
Peng Liu, Shaopeng Wang, Cheng Guo, Li’an Zhang, Hebing Tang
KEYWORDS:
Paleogeomorphology, Mixed Rock Reservoir, Laizhouwan Sag, Reservoir Prediction
JOURNAL NAME:
Open Journal of Energy Efficiency,
Vol.11 No.3,
September
28,
2022
ABSTRACT: KL16 (Kenli 16) oilfield is located in Bohai Sea, close to Laizhou Bay
depression, with favorable reservoir forming conditions. The lower member of
Shahejie Formation (lower sub member of the third member of Shahejie formation)
has shallow burial, complex structural sedimentary evolution, diverse reservoir
lithology types, and unclear reservoir distribution laws, which restrict the
exploration and development process. Comprehensive use of core, seismic,
logging and analytical laboratory data, through the combination of structural
recovery and stratigraphic recovery, the micro paleogeomorphology of the lower
member of Shahejie Formation in the sedimentary period is finely restored, and
the sedimentary system and sedimentary model in the study area are defined. The
study shows that during the sedimentary period of the lower member of Shahejie
formation, four geomorphic units were developed in the study area: uplift,
slope, platform and depression; Under the control of paleogeomorphology, three
different sedimentary environments are developed: Braided River Delta is
developed in the west, shore shallow lake mixed beach bar is developed in the
middle, and fan delta is developed in the south. Based on the analysis of
regional geology and sedimentary characteristics, the principal component
coupling technology based on the constraint of sedimentary facies belt is
optimized for reservoir distribution prediction, and the application effect is
good.