Publications

Naturally fractured reservoirs have attracted an increased interest of exploration and production in recent years. Fractured “Basement” reservoirs provide a challenging environment to properly characterize. The term basement however, defines not just a single homogenous rock type, but a complex interplay of lithologies often genetically very different in origin. Hydrocarbon production from Pre-Tertiary rock is exceptional in Southeast Asia, gas fields in fractured basement are known in Indonesia. Indonesia provides a wide variety of basement reservoir lithologies that range from felsic intrusives to carbonate metasediments. Indonesian basement units are comprised of andesites, granites (granodiorites through monzonites), basaltic dikes, marbles, limestones, quartzites, conglomerates, and phyllites. Granites are dominated by intrusives and violent hydrothermal histories have overprinted many of the original “basement” rock. This paper is intended to describe the value of core data to define the good productivity in fractured reservoirs. In the last several decades, the core data has siginificantly been utilized to characterize the success of fractured reservoirs development in Corridor Block, South Sumatra.