页岩气水平井开采及分段压裂技术浅析

A Brief Analysis of Shale Gas recovery on Horizontal Wells and Fracturing in Subsection Technology

在当前国际能源供需矛盾日益突出的形势下，页岩气开采已成为全球资源开发的一个热点。北美页岩气的成功开发利用，加之我国丰富的页岩气资源，使研究页岩气的开发利用成为实现我国能源安全供给的重要选择．也是我国向清洁能源模式转变、实现低碳经济的有效途径。页岩气生产机制复杂，涉及吸附气与游离气、天然裂缝与诱导裂缝系统之间的相互关系。页岩气储层通常呈低孔、低渗透率，开采寿命长，生产周期长，不同于常规天然气的开采特点决定了页岩气开发具有其独特的方式：水平井和分段压裂技术是成功开发页岩气的关键技术。由于基础资料、理论研究和核心技术方面都比较缺乏，目前国内的页岩气开发仍处于商业性试采阶段。因此，需要学习国外先进技术和管理经验，同时加大自主研发的力度，开发出一套适合我国页岩气储层的技术工艺，加快我国页岩气产业的发展。

Shale gas has complicated production mechanism, which involves correlations between absorbed gas and free gas, between natural fracture and induced fracture systems. Shale gas reservoir strata usually apear low porosity, low permeability, long mining life and long production cycle. Its mining features different from conventional natural gas have determined shale gas development with its unique form： horizontal well and staged fracturing techniques are key for successfully developing shale gas. Because of serious shortage of basic data, theoretical research and core technology, current domestic shale gas development is still in commercial trial production phase. Therefore, we need to learn tbreign advanced technology and management experiences, in the meantime, enhance independent research and development, in order to develop a set of technical process suitable for Cbinese shale gas reservoirs and accelerate the development of Chinese shale gas industry.