Key Technologies of Green Development in the Fuling Shale Gas Field
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摘要: 涪陵页岩气田地处山区，地下暗河溶洞发达，人口密集，开发过程中面临着环境保护问题。结合涪陵页岩气田地表自然环境特征和页岩气开发工程特点，分析了涪陵页岩气田开发过程中面临的主要环境问题，开展了土地集约化利用、水资源节约与保护、油基钻屑无害化与资源化利用、钻井和压裂污水循环利用及页岩气田开发绿色环境管理模式等技术研究，形成了适用于涪陵页岩气田的绿色开发技术体系。现场应用表明，应用绿色开发技术体系后节约土地62.1%，钻井和压裂污水循环利用率达到100%，处理后的油基钻屑含油率低于0.3%，二氧化碳减排64.47×104 t，实现了页岩气田开发零污染。研究认为，涪陵页岩气田绿色开发技术对我国页岩气田规模化开发中的环境保护具有示范作用和借鉴价值。Abstract: The Fuling Shale Gas Field is located in a mountainous area,with well developed underground rivers and karst caves.It also has a highly concentrated population,so the shale gas development in this field is faced with environmental protection problems.Combined with the characteristics of surface natural environment in the Fuling Shale Gas Field and features of shale gas development engineering,the main environmental issues encountered in the development of the Fuling Shale Gas Field were analyzed.Studies on intensive land utilization,water conservation and protection,environmentally neutral utilization and disposal of oil-based drill cuttings,recycling of drilling and fracturing wastewater,and green environment management mode of shale gas development were conducted.They were used in order to establish the green development technology system suitable for the Fuling Shale Gas Field.Field applications showed that after applying the green development technology,the land occupation was reduced by 62.1%,the recycling rate of drilling and fracturing wastewater reached 100%,the oil content of treated oil-based drill cuttings is less than 0.3%,and carbon dioxide emission has been reduced by 64.47×104 t.Thus,the goal of "zero pollution" was realized during shale gas field development.The green and environmental protection development technology of the Fuling Shale Gas Field has served as a valuable model in the environmental protection of large-scale development of shale gas fields in China.
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