Industrial cluster,which can be called in other ways and also be treated as important source of enhancing regional competitiveness and creating regional competitive advantage,has got great concerns from academics and even the government sectors and has been applied in the western oil and natural gas chemical industry cluster development practice.

With the construction of oil and gas pipelines,despite of a variety of anti-corrosion and preventive measures,the pipeline leakage still occurs.

It is difficult for China to recognize, measure, record and report the production activity of oil and gas industry.

The study of oil and gas accounting in China started in the 1980's, which is, on the whole, divided into blankness period before the 1980's, the translation period of the 1980's to the middle 1990's, and deeply systematic research period after the middle 1990's.

Oil and natural gas are the national important energy resources.

Based on the factors including supply and demand,transportation,cataclysm,economy and environment,oil & gas security pre-warning index system was established.