Background

Talks between China and Myanmar on the feasibility of the project began in 2004. In December 2005, PetroChina signed a deal with Myanmar's Government to purchase natural gas over a 30-year period.

based on this agreement, the parent company of PetroChina, China National Petroleum Corporation (CNPC), signed on 25 December 2008 a contract with the Daewoo International-led consortium to purchase natural gas from the Shwe gas field  in A-1 offshore block.

The plan to build the oil and gas pipelines was approved by China's National Development and Reform Commission in April 2007. 

In November 2008, China and Myanmar agreed to build a US$1.5 billion oil pipeline and US$1.04 billion natural gas pipeline. 

In March 2009, China and Myanmar signed an agreement to build a natural gas pipeline, and in June 2009 an agreement to build a crude oil pipeline.

The inauguration ceremony marking the start of construction was held on 31 October 2009 on Maday Island.

The Myanmar section of the gas pipeline was completed on 12 June 2013 and gas started to flow to China on 21 October 2013.The oil pipeline was completed in Aug, 2014.

Brief  Introduction

The Myanmar-China Pipelines project comprises of the construction of two separate, parallel pipelines for transporting crude oil and natural gas from Daewoo International’s offshore blocks A-1 and A-3 in Myanmar, to China.

The project was first proposed in 2004 and took a leap when China National Petroleum Corporation (CNPC) signed a 30-year hydrocarbons purchase and sale agreement with Daewoo International in December 2008.

CNPC’s subsidiary, Southeast Asia Crude Pipeline Company, was assigned with the task of designing, constructing, operating and maintaining the crude and gas pipelines in 2009.

CNPC (50.9%) and Myanmar Oil and Gas Enterprise (MOGE, 49.1%) are investing in the crude oil pipeline, where as CNPC (50.9%), MOGE (7.4%), Daewoo International and KOGAS together share 7.4%, onGC Videsh and GAIL together share 12.5%  are investing in the natural gas pipeline.

Company behavior

In August 2000, South Korea's Daewoo International signed a production sharing contract with the Myanmar Oil and Gas Enterprise (MOGE) to explore, produce, and sell underwater gas reserves off the Arakan coast.
In January 2004, Daewoo International announced a "commercial scale gas deposit" in the offshore A-1 block.  One month later, Daewoo acquired the neighboring A-3 block. 
In August 2006, the two blocks are certified to have an estimated available reserve of 5.4-9.1 trillion cubic feet.
In June 2008, CNPC signed a memorandum of understanding with Daewoo,KOGAS, onGC Videsh,  GAIL to  purchase and transport the natural gas from blocks A-1 and A-3.
In June 2009, CNPC signed an MOU with Burma's Ministry of Energy to construct, operate and manage the oil pipeline, an unloading port, terminal, and storage and transportation facilities.
In October 2009, CNPC began construction of the port for the oil terminal in Kyuak Phyu township.  Completion of the crude oil port and storage facilities was expected sometime in 2010. 

On 3 June 2010, CNPC announced that construction of the pipelines in Burma officially started. CNPC subsidiary CNPC Southeast Asia Co., Ltd. will be in control of the design, construction, operation, expansion and maintenance of the two pipelines.