Premium
Assessment on Tight Oil Resources in Fuyu Oil Layer in the Sanzhao Sag and Relevant Parameters
Author(s) -
ZHENG Man,
WANG Shejiao,
GUO Qiulin,
WANG Rui,
XIE Hongbin,
WANG Shaoyong
Publication year - 2015
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/1755-6724.12304_3
Subject(s) - petroleum engineering , layer (electronics) , tight oil , materials science , composite material , geology , paleontology , oil shale
The oil reservoir formed by Quan3 and Quan4 tight sandstones, also called Fuyu oil layer, in the Sanzhao sag, northern Songliao Basin, contains "sub-source" tight oil, which sourced from the overlying Qing1 lacustrine mudstone that acts as the caprock of the Fuyu oil layer, with the Quan3 and Quan4 tight sand bodies of fluvialshoal water delta sedimentary system as reservoir bed, constituting a "upper source and lower reservoir" type source-reservoir-caprock assemblage. By far, about 5.38×10 t conventional oil in place has been proved in the Fuyu oil layer, and good exploration results have been achieved. The remaining resources in this study area are dominated by tight oil in tight sandstone reservoirs, which is characterized by low resource quality, low single-well output and unclear potential and distribution characteristics of remaining tight oil resource. Therefore, in this paper, based on the geological characteristics and exploration maturity of the Sanzhao area, tight oil targeted methods (e.g. small bin volumetric method, resource abundance analogy method and EUR analogy method) are used for tight oil assessment in the study area, to point out the sweet zones of tight oil. Moreover, key parameters involved in these methods are analyzed, which can provide reference for the assessment of the same type of tight oil resource in the future.