TITLE:
Reservoir Characteristics and Favorable Area Prediction of Chang-6 Reservoir in Zhouguan Area, Ordos Basin
AUTHORS:
Yuchuan Liu, Xiaochun Zhao, Yubo Liu, Shengli Gao
KEYWORDS:
Extension Group, Baihe Oil Region, Sedimentary Microfacies, Basic Characteristics of Reservoir, Favorable Zone
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.11 No.8,
August
7,
2023
ABSTRACT: Based on the analysis of a large number of core samples, logging results,
logging interpretation data and dynamic data in the study area, the characteristics
of Chang 6 reservoir in Zhouguan area of Baihe area are studied, and the
favorable reservoir areas in the study area are predicted. The results show
that the lithology of Chang 6 reservoir is mainly light gray and gray
fine-grained to very fine-grained feldspar lithic sandstone. The pore types are
mainly residual intergranular pores and feldspar dissolved pores, including
debris dissolved pores and microfractures. The porosity and permeability values
are low, which belongs to low porosity-low permeability and ultra-low
permeability reservoirs. According to the reservoir distribution
characteristics and related data, the Chang 6 reservoir in the study area is
divided into two types, mainly Class II and Class III reservoirs. The
comprehensive evaluation predicts that the spatial distribution of the
favorable area of Chang 6 reservoir is not uniform, but the distribution area
is large, which has broad exploration and development value, and provides the
necessary conditions for the distribution study of the favorable oil-bearing
zone in this area and the preparation for the next exploration and development.