普光气田须家河组绿泥石成因及其与储层关系  

The Genesis of Chlorite and Its Relationship with Reservoir in Xujiahe Formation,Puguang Gasfield,Southwest China

作　　者：颜其彬[1,2] 陈培元[1,2] 杨辉廷[2] 谢清惠[3] 杨新涛[4] 

机构地区：[1]油气藏地质及开发工程国家重点实验室西南石油大学,四川成都610500 [2]西南石油大学四川成都610500 [3]中国地质大学,北京100083 [4]中油新疆油田分公司,新疆克拉玛依834000

出　　处：《特种油气藏》2014年第2期16-20,151,共5页Special Oil & Gas Reservoirs

基　　金：中国石油科技创新基金“滩相碳酸盐岩储层成因机理及预测模型研究”(2011D-5006-0105);国家科技重大专项“高含硫气藏安全高效开发技术”(2011ZX05017-001);国家科技重大专项“大型油气田及煤层气开发”(2011ZX05049)

摘　　要：利用大量镜下薄片鉴定、包裹体、扫描电镜以及阴极发光等资料,对普光气田须家河组储层绿泥石形成时间、成因及其与储层的关系进行了研究。结果表明,研究区绿泥石形成于成岩作用早期;与三角洲沉积环境有关,须二段—须四段为三角洲前缘沉积环境,河口坝和远砂坝中的含铁沉积物为绿泥石的形成提供了丰富的铁来源;绿泥石对研究区致密砂岩储层具有积极的作用,可以抑制次生石英加大,同时提高岩石的机械强度和抗压实能力,有效地保存了砂岩的原生孔隙,有助于指导研究区的下一步油气勘探。The formation time and genesis of chlorite and its relationship with reservoir in Xujiahe Formation of Puguang gasfield are studied on the basis of a large number of thin section,inclusion,scanning electron and cathodoluminescence emission data. The results show that the chlorite in the study area formed in early digenesis and is related to delta depositional environment. Xu2- Xu4 Member was formed in delta front depositional environment. The iron sediments in mouth bar and distal bar provides a rich source of iron for chlorite formation. The chlorite plays a positive role to the tight sandstone reservoir in the study area. The chlorite can inhibit the increase of secondary quartz and improve mechanical strength and compressing strength,which will effectively preserve the primary pores in sandstone and guide the next step oil and gas exploration activity in this area.

关 键 词：绿泥石 致密砂岩 成因 须家河组 普光气田 

分 类 号：TE122.2[石油与天然气工程—油气勘探]