摘要
全球页岩气资源丰富,主要分布在北美、中亚和中国。美国率先进行页岩气的勘探开发,目前有35000多口井在生产,其年产量已经超过200×108m3,密西根、印第安纳等多个盆地已投入商业性开采。页岩本身既是烃源岩又是储层,页岩气主要以吸附和自由气的形式存在于页岩之中。一般天然裂缝比较发育的页岩区是页岩气开发的有利目标区。页岩气储层渗透率极低,只有采用适当的增产技术才能实现商业开发。我国页岩气资源十分丰富,预计资源量达100×1012m3。但是,我国对页岩气研究较少,应尽快立项开展其资源评价,以摸清家底。
There are abundant shale gas resources in the world,which are distributed mainly in North America,Central Asia and China.The United States is the first country to have an E&P for shale gas;so far,over 35,000 wells are putting into production and the annual output exceeds 200×10 8 m 3 ;shale gas in some basins of Michigan and Indiana has been in a commercial production.Shale is taken as either source rock or reservoir,and shale gas exists in shale in the way of adsorption and free gas.Generally,shale area with more developed natural fractures is a favorable target for shale gas development.A suitable stimulation should be made to fulfill a commercial development for shale gas because shale reservoir is characterized by extra low permeability.In addition,there are also abundant shale gas resources in China and the predictive resources approach 100×10 12 m 3 .However,the research on shale gas is very scarce in China.So,a further study of shale-gas resource evaluation should be carried out as soon as possible.
出处
《天然气技术》
2008年第3期11-14,57,共5页
NATURAL GAS TECHNOLOGY
基金
"十一五"国家科技支撑计划重点项目"复杂油气田高效开发技术研究"中的"非常规油气评价技术及装备研究"课题(课题编号:2006BAB03B08)资助
关键词
页岩气
射孔
渗透率
二次压裂
水平井
Shale gas Perforation Permeability Secondary fracturing stimulation Horizontal well
