中国石化国内常规天然气储采比现状与可持续发展方向

Status and sustainable development direction of natural gas reserve-production ratio in Sinopec

储采比和储量替代率是衡量油气公司可持续发展的重要指标。“十二五”以来中国石化(以下简称“中石化”)天然气储采比稳中有升。但是,每年新增经济可采储量规模却在下降,2016年储量替代率不足100%。其中,大型、中型的碳酸盐岩气藏和致密低渗气藏的储量接替能力较高,这些气田目前处于稳产期或递减初期,是中石化的主力气田,对中石化天然气储采比、储量替代率的大小起着决定性的作用。但随着勘探难度加大、未开发储量开采对象日益复杂、优质资源减少,实现天然气中长期可持续发展面临挑战。针对目前现状,提出增加经济可采储量、提高储采比的几点建议:①加强海相碳酸盐岩气藏的勘探规划,积极拓展新区带、新层系;②加强致密气藏政策支持和体制改革,最大限度地提高储量的动用程度;③加强未动用储量动用界限及评价方法研究,积极推进区块流转;④重视老区精细管理、调整挖潜,最大限度地提高采收率。

Reserve-production ratio and reserve replacement rate are important indicators for measuring the sustainable development of oil and gas companies.The reserve-production ratio of Sinopec natural gas has increased year by year,however,the overall annual increase in economically recoverable reserves has declined,and the reserve replacement rate in 2016 was less than 100%.Among them,low-permeability sandstone gas reservoirs and carbonate gas reservoirs are the main gas fields.However,as exploration difficulties increase,high-quality undeveloped resources are reduced,achieving sustainable long-term natural gas development faces challenges.According to the current situation,some suggestions for increasing economically recoverable reserves and reserve-production ratio are proposed.First,strengthen the exploration planning of marine carbonate gas reservoirs,and actively expand new zones and new strata;second,strengthen policy support and institutional reforms of tight gas reservoirs,and increase the utilization of reserves;third,strenghen the research on the utilization limit and evaluation method of unused reserves,and actively promote block transfer;finally,pay attention to the management and adjustment of old districts to maximize recovery.