Application of Magnetic Susceptibility Parameters in Research of Igneous Rock in Chepaizi

Abstract

The Carboniferous reservoir of the Chepaizi High in the Junggar Basin is mainly composed of igneous rocks, with complex lithology and low exploration degree. The reservoir is highly heterogeneous and the development characteristics are not clear. The heterogeneity of the Carboniferous reservoir was studied by using the magnetic susceptibility measured in the field or by coring as well as the logging data, thereby, the reservoir space, physical characteristics, distribution characteristics and lithofacies development characteristics and hydrocarbon content of the Carboniferous igneous reservoir were analyzed. The results show that the Carboniferous rocks with high magnetic susceptibility are prone to be weathered into a favorable reservoir with good physical properties, while the Carboniferous rocks with low magnetic susceptibility are difficult to develop into a favorable reservoir, and only occurs near the fault zone. This provides an important basis for the exploration of igneous oil and gas in the study area.