准噶尔盆地中拐凸起二叠系佳木河组砂砾岩沸石胶结特征及其成岩机制分析  

An analysis of the zeolite cement in sand-conglomerate and the diagenetic mechanism of Jiamuhe Formation,Zhongguai area,Junggar Basin

作　　者：吴和源 唐勇[3] 孙玮[4] 王学勇[3] 常秋生[3] 

机构地区：[1]西安石油大学地球科学与工程学院,陕西西安710065 [2]中国石油新疆油田公司博士后工作站,新疆克拉玛依834000 [3]中国石油新疆油田分公司勘探开发研究院,新疆克拉玛依834000 [4]中国石油新疆油田分公司采油二厂,新疆克拉玛依834000

出　　处：《岩石矿物学杂志》2018年第1期75-86,共12页Acta Petrologica et Mineralogica

基　　金：国家油气重大专项(2016ZX05047001-004)~~

摘　　要：准噶尔盆地中拐凸起佳木河组砂砾岩发育广泛的沸石胶结作用。沸石矿物的胶结特征以及胶结成岩机制分析对储层成因机理探索至关重要。以岩心观察为基础,微观镜下分析为辅助,结合电子探针等微区地化测试方法,对中拐凸起佳木河组沸石胶结型砂砾岩岩石物性、沸石胶结、溶蚀特征进行了分析研究,通过成岩作用分析,建立起成岩环境以及沸石胶结成因之间的相互关系。研究结果表明,佳木河组砂砾岩沸石类胶结作用类型主要有方沸石、浊沸石和片沸石,不同类型沸石胶结不具有明显的分带性,常形成多期、多类型沸石共同胶结,这与不同阶段成岩环境关系密不可分,是早期短暂开放性碱性成岩环境为基础、中期酸碱成岩环境交替为辅助、后期长期封闭型碱性成岩环境为主导的综合响应结果。Zeolite cementation is extensively developed in sand-conglomerate of Jiamuhe Formation in Zhongguai bulge, Junggar Basin. The analysis of cement characteristics and diagenesis of zeolite is of great importance for genetic mechanism exploration of the reservoir. Based on core and microscope observation, in combination with geochemical test methods such as electronic microprobe analysis, the authors studied the lithologic features, cementation and dissolution characteristics of Jiamuhe Formation. The results show that the sand-conglomerate of Jiarauhe Formation has developed zeolite, analcite, laumontite, and heulandite. There is no obvious cement zonality between different types of zeolite. Meanwhile the sand-conglomerate is often cemented by multi-period and multi-type zeolite, it is concluded that these cement characteristics had an inseparable relationship with diagenetic environment. It was a comprehensive response result of different stages of diagenetie environment on the basis of a transient openness alkaline diagenetic environment of the early stage, assisted by several alternations between acid-base diagenetic environments of the middle stage, and dominated by a long-term closed alkaline diagenetic environment of the late stage.

关 键 词：沸石 胶结作用 准噶尔盆地 佳木河组 

分 类 号：P578.974[天文地球—矿物学] P588.2[天文地球—地质学]