Post Oak Energy Capital LP said Monday it would lead a $100 million investment for Tulsa-based Nadel and Gussman LLC to hunt for Haynesville Shale opportunities.

The Houston-based private equity firm is providing the commitment to Nadel and Gussman NV LLC (NGNV), which initially would prowl for acquisition opportunities in the Haynesville, with also plans to review “resource shale plays throughout the United States.”

“Nadel and Gussman has a long history of successfully investing in the oil and gas business across the country and provides the ideal partner for Post Oak and its investors,” said Post Oak Managing Director Frost Cochran.

Nadel and Gussman, established in 1940, today it has operations in Kansas, Louisiana, New Mexico, Oklahoma and Texas. The NGNV team is led by Jim Adelson and Stephen Heyman, with Kevin DeLay as COO and Shelley Nichols as CFO. Jim Bucci is vice president (VP) of geoscience and Perry Phipps is VP of land and general counsel.

Post Oak has an extensive portfolio of energy investments in the U.S. onshore. This year it has led a $200 million commitment to Midland, TX-based Moriah Henry Partners LLC to acquire properties in the Permian Basin of West Texas. It also led a $100 million equity commitment to Houston Saxet II Minerals LLC, its second, to prowl for more property in the U.S. onshore.