The Midcontinent Supply Header Interstate Pipeline (Midship) project is a 376.5km natural gas pipeline being developed by Midship Pipeline Company in Oklahoma, US. It is expected to enter service by the end of 2019.

Midship Pipeline Company is a joint venture between Cheniere, a liquefied natural gas company, and EIG Global Energy Partners, a private equity firm.

The proposed natural gas pipeline will deliver up to 1,400 million metric cubic feet per day (Mmcf/d) of natural gas from the Sooner Trend Anadarko Basin Canadian and Kingfisher (STACK) and the South Central Oklahoma Oil Province (SCOOP) plays in the Anadarko basin of Oklahoma to the existing pipelines in Bennington, Oklahoma.

The project, which is estimated to cost approximately $1bn to develop, will serve the increasing demand for natural gas from the Gulf Coast and south-east markets, including the Perryville Hub near Tallulah, Louisiana, and the TexOk hub near Atlanta, Texas.

Midship natural gas pipeline development background

The draft and final environmental impact statements for the project were prepared in February and June 2018 respectively.

Midship Pipeline filed an application with the US Federal Energy Regulatory Commission (FERC) in May 2017 for authorisation to construct and operate the pipeline and received approval in August 2018.

The FERC issued final approval to proceed with the construction of the pipeline in February 2019.

Midship Pipeline executed firm transportation commitments with Cheniere’s subsidiaries and affiliates including Marathon Oil, Gulfport Energy and Devon Energy in March 2017.

Midship natural gas pipeline design and route details

The Midship project will comprise 321.8km of mainline pipeline with a diameter of 36in and maximum allowable operating pressure of 10.2MPa.

The mainline pipeline will start at Anadarko Basin in Kingfisher County and terminate at an interconnection with the existing pipelines near Bennington. It will run through counties including Canadian, Grady, Stephens, Johnston, and Bryan.

The project will also include the construction 33km of 30in-diameter pipeline, called Chisholm lateral, between the Chisholm processing plant in Kingfisher County and the mainline of the Midship project near Okarche.

A 22.2km-long, 16in-diameter pipeline called Velma lateral will be built from the Velma processing plant in Stephens county to Garvin county through Carter county.A 160.9m tie-in pipeline with a diameter of 24in will be built in the Canadian county.

Infrastructure facilities

The project will consist of a booster station, three mainline compressor stations, four delivery meters, eight receipt meters and two receipt taps.

The three compressor stations will be built at Calumet, Tatums and Bennington in Canadian, Garvin and Bryan counties respectively. The 21MW Calumet station will include two Solar Centaur 50 gas-fired turbines, two Caterpillar G3512 gas-fired emergency generators and a Solar Mars 100 gas-fired turbine.

The 32.9MW Tatums station will be installed with two Solar Taurus 70 gas-fired turbines, two Caterpillar G3512 gas-fired emergency generators and a Solar Titan 130 gas-fired turbine.

The Bennington station will have a capacity of 31.5MW and will be equipped with two Solar Centaur 50 gas-fired turbines, two Caterpillar G3512 gas-fired emergency generators and one Solar Titan 250 gas-fired turbine.

The four new delivery meters will be located at NGPL 801, Bennington, Natural Gas Pipeline Company of America (NGPL) meter stations, while the receipt meters will be built at Chisholm, Okarche/Mark West, Canadian Valley, Cana, Iron Horse, Velma and Grady meter stations.

The 2.79MW Sholem booster station will be located in Stephens along the Velma lateral, while the Bradley and Wildhorse receipt taps will be built in Grady and Garvin counties respectively.

Midship natural gas pipeline financing

Investment funds managed by EIG Global Energy Partners agreed to invest up to $500m in the Midship project in June 2017.

Midship Pipeline secured $680m in senior secured credit facilities, including a $615m construction loan facility and $65m revolving credit facility, in March 2019.

Contractors involved

TRC was contracted by Midship Pipeline Company to provide environmental consulting, engineering and field services for the pipeline project, as well as engineering, procurement and construction (EPC) support for three compressor stations.

Strike, a pipeline and facilities solutions provider, M.G. Dyess, a pipeline contractor, and Cenergy, a provider of energy personnel and safety services, have been contracted for the construction of the pipeline and associated infrastructure facilities.