He did convince a bunch of Swedes to put up cash for drilling around the lake Siljan in the eighties. The project is described in the informative and very entertaining The Golem at large - What You Should Know about Technology which I highly recomend. Good insights in the relationships between science and technology.

To make a long story short, the project might have found some oil and it might not, but anyway there was nowhere near enough for commercial exploitation when the investors patience ran out.

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