Open AccessSedimentary characteristics and geological significance of sublacustrine fan in the Houdomoer tectonic belt
Author(s) -
P. A. Blakey
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/836/1/012014
Subject(s) - geology , sedimentary rock , tectonics , facies , stratum , sedimentary depositional environment , well logging , geochemistry , petrology , geomorphology , paleontology , petroleum engineering , structural basin
At present, the sedimentary characteristics of the sublacustrine fans in the Houdomoer tectonic belt have not been clearly understood, which restricts further oil and gas exploration. In this research, the sedimentary characteristics of the sublacustrine fans and their oil and gas geological significance are studied based on the data of core, well logging, logging and earthquake. It is found that the sublacustrine fans in the study area can be divided into three types. The sublacustrine fan of the Houdomoer tectonic belt is located in the stratum next to the best source rock in Nantun Formation. Oil and gas are injected into the sublacustrine fan sand body from the bottom and side. Generally, oil and gas accumulation is mainly controlled by the physical characteristics of the reservoir. Experimental analysis shows that the reservoir capacity of different sedimentary microfacies is quite different. The braided channel microfacies of the middle fan is the most favorable type of reservoir facies belt, and the main channel microfacies of the inner fan is the second most favorable reservoir. The practice of oil and gas exploration also proves that the high-yield wells are mostly located in the braided channel microfacies of the middle fan. Therefore, this microfacies type has a broad exploration prospect.