It's increasingly difficult for conventional natural gas to scale up both reserves and production with the advance-ment of exploration and development in natural gas.Natural-gas exploration and development is gradually shifting from conventional to unconventional domains.However,there exists significant difference in technical and economic traits be-tween them.Thus,the comparative analysis was conducted for China's conventional and unconventional gas based on their genesis and geological features,exploration risks and costs,and development technologies.Results show that(i)unconven-tional gas in our country has more complicating genesis and geological features.It's essential to figure out its geologic con-ditions and evolution laws through benchmarking methodology so as to reduce exploration uncertainties;(ii)for unconven-tional gas,the exploration and development risks are generally higher,which should be turned from"passive meeting with"to"active foresight"by means of some studies on its identification,evaluation,and management to get clear pictures;(iii)unconventional gas spends higher development costs than conventional gas on the whole.Thereupon,some measures for cost reduction should be made,such as joint exploration and production between these two domains,enlarging technologi-cal R&D to raise development efficiency,optimizing operation steps to cut down invalid costs,strengthening safety risk control to diminish accident incidence,and pushing on cost's target management;and(iv)technologies used in both conven-tional and unconventional gas have their own style.Technical progress can be facilitate by setting up special fund for inno-vative research,building up knowledge-sharing platforms for unconventional gas,and collaboratively promoting theoretical research and practical application.
conventional gasUnconventional gasTechnical and economic characteristicsGeological conditionExplora-tion and development riskExploration and development costDevelopment technologies
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