玛湖凹陷二叠系下乌尔禾组沸石成因及溶蚀机制

doi:10.12108/yxyqc.20200511

岩性油气藏 ›› 2020, Vol. 32 ›› Issue (5): 102–112.doi: 10.12108/yxyqc.20200511

玛湖凹陷二叠系下乌尔禾组沸石成因及溶蚀机制

雷海艳^1,2, 樊顺³, 鲜本忠⁴, 孟颖^1,2, 杨红霞^1,2, 晏奇⁵, 齐婧^1,2

1. 中国石油天然气集团有限公司砾岩油气藏勘探开发重点实验室, 新疆克拉玛依 834000;
2. 中国石油新疆油田分公司实验检测研究院, 新疆克拉玛依 834000;
3. 中国石油新疆油田分公司百口泉采油厂, 新疆克拉玛依 834000;
4. 中国石油大学 (北京)地球科学学院, 北京 102249;
5. 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

收稿日期:2020-03-23 修回日期:2020-05-27 出版日期:2020-10-01 发布日期:2020-08-08
第一作者:雷海艳(1987-),女,硕士,工程师,主要从事沉积储层方面的研究工作。地址:(834000)新疆克拉玛依市准噶尔路29号实验检测研究院3号楼。Email:lhy1987@petrochina.com.cn。
基金资助:
国家自然科学基金“构造-物源供给对湖相断陷盆地异重流沉积的控制机理：以东营凹陷沙河街组为例”（编号：41872113）和国家青年科学基金“基于滩坝沉积信息的古风场的定量表征：以渤海湾盆地东营凹陷始新统为例”（编号：41702104）联合资助

Genesis and corrosion mechanism of zeolite of Lower Urhe Formation of Permian in Mahu Depression

LEI Haiyan^1,2, FAN Shun³, XIAN Benzhong⁴, MENG Ying^1,2, YANG Hongxia^1,2, YANG Qi⁵, QI Jing^1,2

1. Key Laboratory of Conglomerate Reservoir Exploration and Development, CNPC, Karamay 834000, Xinjiang, China;
2. Research Institute of Experiment and Detection, PetroChina Xinjiang Oilfield Company, Karamay 834000, Xinjiang, China;
3. Baikouquan Oil Production Plant, PetroChina Xinjiang Oilfield Company, Karamay 834000, Xinjiang, China;
4. College of Geosciences, China University of Petroleum(Beijing), Beijing 102249, China;
5. Research Institute of Exploration and Development, PetroChina Xinjiang Oilfield Company, Karamay 834000, Xinjiang, China

Received:2020-03-23 Revised:2020-05-27 Online:2020-10-01 Published:2020-08-08

摘要/Abstract

摘要： 为研究玛湖凹陷二叠系下乌尔禾组沸石成因及溶蚀机制，开展了岩石薄片鉴定、荧光分析、场发射扫描电子显微镜观察、电子探针分析、能谱分析和包裹体测试。结果表明：①研究区沸石族矿物以浊沸石为主，片沸石次之，偶见方沸石、斜发沸石和辉沸石，沸石既有高温成因类型，也有低温成因类型。②沸石成因主要包括2类：早成岩期以火山物质蚀变为主，该类沸石胶结的岩心多疏松易散；晚成岩期以孔隙水结晶为主，岩心多致密。片沸石、方沸石、斜发沸石和辉沸石成因以凝灰质的蚀变为主，浊沸石成因既有凝灰质蚀变，又包括孔隙水结晶成因。③平面上，沸石类型及含量分布特征受控于沉积相带，溶蚀差异则受控于有机酸的供给。浊沸石多发育于扇三角洲前缘厚层粗粒砂砾岩中，片沸石多发育于扇三角洲平原前端富含凝灰质砾岩中。在接近深水区烃源岩发育区的三角洲前缘部位或裂缝发育带附近的砂砾岩储层中，浊沸石溶蚀程度高，优质储层发育。该研究成果对含沸石族储层研究和玛湖凹陷二叠系下乌尔禾组油气勘探均具有指导作用。

关键词: 沸石族矿物, 溶蚀孔, 凝灰质蚀变, 孔隙水结晶, 下乌尔禾组, 玛湖凹陷

Abstract: In order to study the genesis and dissolution mechanism of zeolites in the Lower Urhe Formation of Permian in Mahu Depression,thin section identification,fluorescence analysis,field emission scanning electron microscopy,electron probe analysis,energy spectrum analysis and inclusion test were carried out. The results show that:(1)The mainly zeolite group minerals in the study area are turbidite,followed by heulandite,analcite,clinoptilolite and zeolites. The zeolites have both high-temperature and low-temperature genesis types.(2)The genesis of zeolites mainly includes two types:in the early diagenetic stage,it is dominated by alteration of volcanic materials,and the cores cemented by zeolites are mostly loose and easy to disperse;in the late diagenetic stage, it is dominated by pore water crystallization,and the cores are mostly dense. Heulandite,analcite,clinoptilolite and pyroxene are mainly caused by tuffaceous alteration,while turbidites are caused by tuffaceous alteration and pore water crystallization.(3)On the plane,the type and content distribution of zeolites are controlled by the sedimentary facies,while the dissolution difference is controlled by the supply of organic acids. Most of the laumontite are developed in the thick coarse-grained glutenite of the fan delta front,and most of the heulandite is developed in the tuffaceous conglomerate in the front of the fan delta plain. In the glutenite reservoir in delta front or near fracture development zone near the deep-water source rock development area,the turbidite has high dissolution degree and high-quality reservoir development. The research results can be used to guide the study of zeolites bearing reservoirs and the exploration of oil and gas in the Lower Urhe Formation of Permian in Mahu Depression.

Key words: zeolite group minerals, dissolved pore, tuffaceous alteration, pore water crystallization, Lower Urhe Formation, Mahu Depression

中图分类号:

TE122.1

雷海艳, 樊顺, 鲜本忠, 孟颖, 杨红霞, 晏奇, 齐婧. 玛湖凹陷二叠系下乌尔禾组沸石成因及溶蚀机制[J]. 岩性油气藏, 2020, 32(5): 102–112.

LEI Haiyan, FAN Shun, XIAN Benzhong, MENG Ying, YANG Hongxia, YANG Qi, QI Jing. Genesis and corrosion mechanism of zeolite of Lower Urhe Formation of Permian in Mahu Depression[J]. Lithologic Reservoirs, 2020, 32(5): 102–112.

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玛湖凹陷二叠系下乌尔禾组沸石成因及溶蚀机制

Genesis and corrosion mechanism of zeolite of Lower Urhe Formation of Permian in Mahu Depression

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