Spero Oil & Gas, L.L.C. is a privately owned oil and gas exploration and production company based in Houston, Texas, specializing in prospect generation and evaluation of onshore oil and gas exploration and development opportunities.  Patrick J. McCarthy, a Petroleum Geologist, founded the company in 1990.


The business strategy of Spero Oil & Gas, L.L.C. is founded on the recognition that there is excellent latent reserve potential in the mature and sometimes abandoned domestic oil and gas fields and trends.


We believe there is a short window of opportunity in certain prolific geologic trends where the integration of new 3-D surveys, DHI and AVO analysis, new geologic ideas, sequence stratigraphy, and technological advances in re-completion and production techniques can be used to capture an additional 20 to 30 percent of the reserves produced per field.


Spero Oil & Gas, L.L.C. believes in establishing long-term business relationships, and strives to select partners and investors who share the same values.

Contact us


712 Main St, Ste 3000B

Houston, TX  77002

Phone     713-650-0311

Fax         713-225-5995