川渝地区天然气管网特征及新建管道项目技术经济评价需求

Pipeline network characteristics and needs for economic and technical evaluation of the pipelines newly built in Sichuan-Chongqing area

四川盆地是中国陆上第三大含油气盆地,常规气、页岩气资源量均居全国之首。川渝地区拥有天然气资源禀赋优势,具有巨大的行业发展潜力和空间。为了加快四川盆地天然气产业的发展,对川渝地区天然气管网现状进行调研,以新建管道项目技术经济评价需求为研究对象,提出了川渝管网新建管道经济评价主要影响因素和技术经济特性。研究结果表明:(1)川渝地区天然气管网系统的历史成因有以下3点,即天然气资源分布及开发建设顺序、油气田一体化管理模式的推动及市场的辅助作用;(2)川渝管网的优势有以下4点,即开拓和培育市场、促进利用多元化和产业集群、提高供应安全保障和形成完整发达的产业链;(3)川渝管网新建管道经济评价主要影响因素有以下2点,即蛛网式管网结构是塑造新建管道多元功能的关键因素,投资主体多元化是经济评价反映管道多元功能的主要推手;(4)川渝管网新建管道布局时,应综合考虑企业效益和社会效益,可通过由运输成本决定的用气企业区位论和由投资成本决定的供气点区位论两种方法进行测算。

Sichuan Basin is the third largest petroliferous onshore basin in China,whose conventional and shale gas re⁃sources rank on top in this country.In Sichuan-Chongqing area where is endowed with natural-gas resource advantage,there exists huge development potential and space in the natural-gas industry.Thus,the current pipeline network was in⁃vestigated for this area in order to push the development of natural gas in the basin.And then,taking needs for technical and economic evaluation of the newly built pipelines as objectives,we presented not only the main influential factors on the economic evaluation but technical and economic characteristics.Results show that(i)there are three historical reasons to develop into this network,such as the natural-gas resource distribution as well as development and construction order,the promotion of field integrated management modes and the complementary role of markets;(ii)the network boasts 4 sorts of superiority,namely,opening-up and cultivating markets,promoting diversified utilization and industrial clustering,en⁃hancing safe supply guarantee,and forming a complete and developed industrial chain;(iii)affecting the economic evalua⁃tion,two factors contain the spider-web pipeline network structure as the key to shape multiple functions of new pipelines and the diversified investment subjects as the main driving force to reflect numerous functions of pipelines;and(iv)both enterprise efficiency and social benefits should be fully taken into consideration during an overall arrangement of these new pipelines.And the efficiency and benefits are estimated by two methods,one location theory of gas-consumption enterpris⁃es decided by transportation costs and the other of gas suppliers as the result of investment costs.