准噶尔盆地哈山地区石炭系二叠系火山岩储层发育机制研究  

Mechanism of reservoir development in the Carboniferous-Permian volcanic rock reservoirs in Hala’alate Mountain area,Junggar Basin

作　　者：周健 林承焰[3] 刘惠民[2] 张奎华[2] 张关龙 王千军 于洪洲 倪胜利 牛花朋[4] 焦小芹 刘姗 ZHOU Jian;LIN Chengyan;LIU Huimin;ZHANG Kuihua;ZHANG Guanlong;WANG Qianjun;YU Hongzhou;NI Shengli;NIU Huapeng;JIAO Xiaoqin;LIU Shan(Research institute of petroleum exploration and development,Sinopec Shengli Oilfield,Dongying 257000,China;Sinopec Shengli Oilfield,Dongying 257000,China;Earth Science and Technology,China University of Petroleum(East China),Qingdao 266580,China;College of Geosciences,China University of Petroleum(Beijing),Beijing 102249,China)

机构地区：[1]中国石油化工股份有限公司胜利油田分公司勘探开发研究院,山东东营257000 [2]中国石油化工股份有限公司胜利油田分公司,山东东营257000 [3]中国石油大学(华东)地球科学与技术学院,山东青岛266580 [4]中国石油大学(北京)地球科学学院,北京102249

出　　处：《地学前缘》2024年第2期327-342,共16页Earth Science Frontiers

基　　金：中国石化重点项目“准噶尔盆地重点山前带成藏规律及突破方向研究(P22079)”;胜利油田分公司科研项目“哈山构造带下二叠统原型盆地恢复及勘探潜力评价(YKK2213)”。

摘　　要：哈山地区位于准噶尔盆地西北缘,形成于陆缘岛弧背景之下,其石炭系二叠系火山岩储层是油气藏勘探的重点领域。为进一步明确哈山地区石炭系二叠系火山岩储层的勘探前景,在岩心、薄片鉴定基础上,综合扫描电镜、微米CT、流体包裹体等技术方法,结合储层物性参数、主微量元素分析结果,对该区石炭系二叠系火山岩储层发育机制展开系统研究。结果表明:(1)哈山地区火山岩储集空间类型主要为溶蚀孔、粒间孔和溶蚀缝,孔隙直径大且连通性较好,但非均质性较强;(2)火山岩岩相、裂缝、风化淋滤和深部热液流体是影响火山岩储层物性的关键因素——溢流相和爆发相是有利储层发育相带,构造抬升和逆冲推覆使推覆体前翼、断层交汇处储层物性更优质,风化淋滤又进一步改善了储层;(3)基于物性岩相储集空间联合分析,将哈山地区火山岩储层划分为3类,其中优质储层主要位于逆冲推覆带的“三角”地带。结论认为,哈山地区石炭系二叠系火山山岩具备发育大规模优质储层的条件,展现出巨大的油气勘探开发潜力。The Hala’alate Mountain(Hashan)area located in the northwestern margin of the Junggar Basin is associated with an ancient continental margin island arc,where the Carboniferous-Permian(C-P)volcanic rock reservoirs are the main target for oil and gas exploration.To further assess the exploration prospect of the volcanic rock reservoirs we carry out a systematic investigation into the mechanism of reservoir development in Hashan.Core log,thin section,scanning electron microscope,micro CT,fluid inclusion and other techniques are used for the characterization of reservoir rocks,in combination with major and trace element analysis.We find(1)the main pore types in the volcanic rock reservoirs are dissolution pores,intergranular pores and dissolution fractures with large pore-diameter and good connectivity but strong heterogeneity.(2)Volcanic rock facies,fractures,weathering leaching and deep hydrothermal fluid are key factors affecting reservoir quality,where overflow facies and explosive facies are favorable facies belts for reservoir development.Tectonic uplift and thrust napping improve reservoir quality at the front wing of nappes and fault intersections(“Triangle”area),and weathering/leaching contribute to further improvement.(3)Based on the combined analysis of reservoir rock property and lithofacies,the volcanic rock reservoirs are classified into three quality grades.High-quality reservoirs are mainly located in the“Triangle”area of the thrust nappe belt.We conclude that the C-P volcanic rocks in Hashan area has good prospect of forming large-scale,high-quality reservoirs with huge exploration and development potentials.

关 键 词：火山岩 储集空间 储集物性 形成机制 哈山地区 

分 类 号：P588.14[天文地球—岩石学] P618.130.2[天文地球—地质学]