In late 1999, the Federal Government of Nigeria issued new guidelines for the development of proven underdeveloped fields in the country. To achieve this, the Government recovered twenty-nine (29) abandoned and/or under-exploited fields from the major operators in Nigeria and their production rights were re-allocated through farm-in agreements.

As a result, in 2002 the Government offered twenty-four (24) marginal field packages to Nigerian upstream oil companies.Midwestern was one of more than thirty (30) indigenous upstream entrepreneurs that were awarded these marginal fields .

In 2003, Midwestern Oil & Gas Company Limited was awarded 70% interest in Umusadege Field located in OML 56 which is situated at the northern area of Delta State, Nigeria. Midwestern is the operator of the field while SunTrust Oil Company Ltd its joint venture Partner holds 30% interest which is jointly held by Mart Umusadege Resources Nigeria Ltd, the Risk Service Provider to the joint venture. Midwestern commenced its upstream activities in 2005.

Midwestern is the operator of Umugini Asset Company Limited (UACL), a pipeline company which constructed a 51.4km pipeline from Umusadege to Eriemu for injecting crude into the Trans-Forcados Pipeline. The UACL pipeline has a design capacity of 82,500bbls per day commissioned in 2014.

Midwestern acquired an interest in OML 18 (Eroton E & P Company Ltd), one of the divested assets of Shell Petroleum Development Company Limited in 2015. The Company achieved 10 million Man-Hours LTI-Free operations in 2017. Midwestern has also received several awards and recognitions by notable national and international bodies for achievements in HSE.