准噶尔盆地下侏罗统页岩气形成条件

准噶尔盆地是中国西部的大型含油气盆地之一，沉积了多套烃源岩层，其中，侏罗系是盆地最重要的气源岩，蕴含巨大的页岩气资源。通过钻井、录井、露头、岩芯资料及样品分析结果，从泥页岩的展布及埋藏条件、有机地球化学特征、储层条件和含气特征几方面，研究下侏罗统页岩气的形成条件并对页岩气有利的勘探层位和区带进行了预测。准噶尔盆地下侏罗统泥页岩广泛发育，以盆地西北缘及南缘沉积厚度最大；埋藏深度1 000～9 000 m，整体上具有自北向南逐渐增加趋势；泥页岩有机碳含量较高，有机质类型以III 和II2 为主，具有倾气特征，有机质演化处于未成熟高成熟阶段。泥页岩储层具有孔隙度低、黏土含量高的特点，储集空间以微裂缝为主。实验测得下侏罗统泥页岩平均吸附含气量为1.42 m3/t。泥页岩段气测显示活跃，通过现场解吸试验证实了泥页岩中有天然气赋存。综合对比研究认为，准噶尔盆地下侏罗统八道湾组为页岩气最有利的勘探层位，达巴松中拐地区为页岩气勘探最有利目标区。

SEEKING ADVICE FROM NETIZENS ON MICROBLOGS:ANALYSIS OF THE NEW MODE OF INTERACT BETWEEN GOVERNMENT AND CITIZENS

As a means of public opinion,the Internet brings government and the public closer and opens a new window of communication between them.Microblog provides an easy and populr access to public opinions.Against this background,more and more central and local party and government organs begin to seek advice from the Internet.Thereupon,the party and government institutions and officials open microblogs to seek advice from netizens on microblog,creating the new mode of interaction between government and citizens.At the primary stage,this new mode shows its significant advantages.It can bring government and the public closer,accelerate the release of information,ease the pressure of public opinion and enhance the sense of responsibility of government and officials.This new mode of interction has a great potential in public administration.Government needs to well orientate its role,improve communication skills and strengthen the scientific management and guidance of this new mode,if it wants to make good use of this mode.