Paraná Basin is a huge oval-shaped basin covering the southern portion of Brazil and parts of Argentina, Paraguay, and Uruguay, with an area of more than 1,700,000 km2 (Figure 1). Hydrocarbon exploration in Paraná Basin has been a challenge due to the world's second-most-extensive inshore flood basalt complex overlying the Paleozoic sedimentary rocks (Figure 1), which in turn are extensively intruded by swarms of diabase dikes and sills, making seismic imaging a difficult task. The basin itself represents approximately one-half of the sedimentary rock volume of onshore Brazilian basins and is still underexplored. No major discovery for oil or gas has been made to date.

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