Jack J. Grynberg

Jack J. Grynberg
Born	(1932-01-21) 21 January 1932 Brest, Poland (present-day Belarus)
Died	11 October 2021(2021-10-11) (aged 89)
Occupation(s)	Entrepreneur in the oil and gas industry
Years active	1960s–2021
Known for	Discovering the Nitchie Gulch gas field; involvement in Kashagan Field discovery; legal battles over energy ventures

Jack J. Grynberg (January 21, 1932 – October 11, 2021) was an American entrepreneur in the oil and gas industry based in Denver, who amassed a multibillion-dollar fortune through his energy ventures.

By 2019, he was engaged in extended legal battles aimed at reclaiming control of enterprises he had established from his former wife and three children, or alternatively, to obtain roughly $400 million in unpaid compensation.

Early life

Grynberg was born into a Jewish family in Brest, Poland (present-day Belarus). During his childhood, he lived through World War II and is said to have taken part in resistance activities. Later relocating to Colorado, he earned a master's degree in Petroleum Engineering and Refining from the Colorado School of Mines and began raising a family. He also asserted that he served as a U.S. Army intelligence operative in the late 1950s.

Early career

By age 30, Grynberg had secured his first million dollars after founding Oceanic Exploration Co., which successfully redeveloped a gas well that Amerada Hess Corporation had previously abandoned as noncommercial. This effort led to the 1962 discovery of the Nitchie Gulch gas field in Wyoming. He broadened his operations into both domestic and international oil and gas exploration and took Oceanic Exploration public in 1972.

Later career

In the 1990s, Grynberg was instrumental in uncovering the Kashagan Field in Kazakhstan, one of the most significant oil finds in thirty years. The field is estimated to contain billions of barrels of recoverable oil along with vast natural gas reserves. He was among the earliest Western oil executives to establish connections with Kazakh President Nursultan Nazarbayev prior to the dissolution of the Soviet Union, gaining access to critical information.

Court documents reveal that Grynberg facilitated introductions and supplied data enabling companies such as BG, BP, Statoil, ARCO, and Transworld Oil to enter the Kazakh market during the late 1980s and early 1990s. After the consortium disbanded, BG negotiated independently for the Karachagnak gas/condensate field and attempted to exclude Grynberg, leading him to initiate litigation in Texas. Similarly, when BP sought to exclude him from its 9.5% stake in Kashagan, Grynberg filed suit in New York, including racketeering allegations against then-CEO John Browne; this dispute was ultimately resolved through arbitration.

In 2003, BG and BP sold their Kashagan stakes—BG to Sinopec and BP to CNOOC—for a combined estimated total of $1.23 billion. Reports indicate Grynberg received up to 15% of this amount (approximately $185 million). This followed an earlier $90 million payment related to BP and Statoil’s partial sale of assets to Total for $600 million in 2001.

Renowned for staunchly protecting his interests, Grynberg notably declined a $90 million settlement check during negotiations, demanding appraisal and arbitration instead.

Throughout his career, he has owned more than 800 oil and natural gas wells worldwide and participated in projects spanning the former Soviet Union, Middle East, Africa, Far East, and Latin America.

Additionally, Grynberg pursued a Qui Tam lawsuit accusing major oil corporations of misappropriating billions in royalties owed to the U.S. government.

Later ventures

Beginning in 2006, Grynberg concentrated on establishing ethanol production facilities across Latin America by securing leases and agreements throughout the region.

Between 2006 and 2007, he reportedly collaborated with Ivanhoe Energy (IVAN: NASDAQ) concerning services related to his leases at Ecuador’s Pungarayacu Tar Sands Heavy Oil Deposit.

Public court records allege that after sharing confidential geotechnical information during joint venture negotiations, Ivanhoe circumvented Grynberg by bribing Ecuador’s former president to revoke his lease and transfer it to Ivanhoe. The current Ecuadorian president has publicly acknowledged these issues. Legal proceedings remain ongoing against Ivanhoe and its Chairman, Robert Friedland.

Personal life

He was married to Celeste until their separation in 2018, and together they had three children: Rachel, Stephen, and Miriam.

Grynberg passed away on October 11, 2021, at the age of 89.

External links

• ICSID Jack J. Grynberg v. Grenada Award dated 27 March 2009
• npr.org