"Oil companies register UN climate commitments", 20 August 2015

Statoil, BG Group and Pemex are among seven oil and gas majors to have proposed methane emission cuts listed as official contributions to a global climate deal... ENI, PTT, Southwestern Energy and Total have also committed...[to the] initiative led by the UN Environment Programme (UNEP). 

To comply with their pledges the companies will check operations for major leaks, invest in technology to prevent them and report progress back to the UN. 

Methane emissions are far lower than carbon dioxide, but they are 84 times more potent as greenhouse gases over a 20-year period...

Separately the World Bank wants all major oil and gas producers to sign up to a plan to stop gas flaring by 2030. [also refers to Shell, BP]