Abstract: China’s proven but undeveloped natural gas reserves account for 36 percent of the country’s total proven reserves for gas fields. Accelerating development of the undeveloped reserves can further increase and maintain China’s natural gas production. Based on analysis of the distribution, characteristics and non-producing reasons of China’s proven but undeveloped natural gas reserves, this paper elaborates the method, standards and process for classification and assessment of the proven but undeveloped reserves, thus, bringing such reserves under classification and assessment. China’s proven but undeveloped natural gas reserves are mainly from the low-permeability to super low-permeability and carbonate heterogeneous gas reservoirs and concentrated in Sichuan, Ordos and Tarim basins. Of the undeveloped reserves, those that can be produced in the near future account for 27.4 percent, while the reserves difficult to be produced occupy 58.4 percent and the reserves to be written off amount to 14.2 percent. China has a large amount of the reserves difficult to be produced, which cannot be produced under the current structuring mechanisms and the current technological, economic and policy conditions. Therefore, from the angles of the oil and gas companies’ restructuring mechanism, managerial and technological innovation, and the State policies, this paper comes up with the suggestions on the concrete measures and policies for accelerating development of China’s difficult-to-produce reserves.

摘要： 我国天然气探明未开发储量在全国已探明气田储量中占比超1/3，加快未开发储量的动用可促进天然气进一步上产稳产。基于我国天然气探明未开发储量的分布、特点及未动用的原因分析，建立了探明未开发储量分类评价方法、标准及流程，并进行了分类评价。我国天然气探明未开发储量以低渗透—特低渗透和碳酸盐岩非均质气藏储量为主，集中分布在四川、鄂尔多斯、塔里木盆地。未开发储量中，近期可动用储量占27.4%，难动用储量占58.4%，待核销储量占14.2%。我国难动用储量规模较大，在目前体制机制、技术经济及政策条件下无法动用，为此，从油气企业体制机制改革、管理与技术创新、国家政策等方面提出了加快我国难动用储量开发的具体举措与政策建议。

关键词: 天然气, 探明地质储量, 未开发储量, 难动用储量, 分类评价, 有效开发