双鱼石构造栖霞组白云岩储层特征及主控因素

doi:10.11885/j.issn.1674-5086.2019.04.29.03

西南石油大学学报(自然科学版) ›› 2020, Vol. 42 ›› Issue (5): 1-12.DOI: 10.11885/j.issn.1674-5086.2019.04.29.03

• 地质勘探 • 下一篇

双鱼石构造栖霞组白云岩储层特征及主控因素

彭先¹, 彭军², 张连进¹, 林攀², 兰雪梅¹

1. 中国石油西南油气田分公司勘探开发研究院, 四川成都 610051;
2. 西南石油大学地球科学与技术学院, 四川成都 610500

收稿日期:2019-04-29 出版日期:2020-10-10 发布日期:2020-10-10
通讯作者: 彭军,E-mail:pengjun@swpu.edu.com
作者简介:彭先,1969年生,男,汉族,陕西汉中人,高级工程师,硕士,主要从事气藏地质特征及开发动态分析方面的研究工作。E-mail:pengxian@petrochina.com.cn;彭军,1968年生,男,汉族,四川仁寿人,教授,博士生导师,主要从事沉积学、储层地质学及层序地层学方面的研究工作。E-mail:pengjun@swpu.edu.cn;张连进,1982年生,男,汉族,河北南宫人,高级工程师,硕士,主要从事井位部署及油气田开发方面的研究工作。E-mail:zhanglianjin268@petrochina.com.cn;林攀,1992年生,男,汉族,四川广安人,硕士研究生,主要从事沉积学、储层地质学方面的研究工作。E-mail:277748006@qq.com;兰雪梅,1989年生,女,汉族,四川泸州人,硕士研究生,主要从事气藏精细描述及油气田开发方面的研究工作。E-mail:lanxuemei@petrochina.com.cn
基金资助:
中国石油重大科技专项（2016E-06）

Characteristics and Main Controlling Factors of the Middle Permian Qixia Formation Reservoir in Shuangyushi Structure

PENG Xian¹, PENG Jun², ZHANG Lianjin¹, LIN Pan², LAN Xuemei¹

1. Research Institute of Petroleum Exploration and Development, PetroChina Southwest Oil & Gas Field Company, Chengdu, Sichuan 610051, China;
2. School of Geosciences and Technology, Southwest Petroleum University, Chengdu, Sichuan 610500, China

Received:2019-04-29 Online:2020-10-10 Published:2020-10-10

摘要/Abstract

摘要： 针对川西北双鱼石构造栖霞组白云岩储层特征及主控因素问题，以野外剖面实测、岩芯观察描述及钻测井资料为基础，结合普通镜下薄片、铸体薄片、扫描电镜及阴极发光等分析手段，探讨储层发育特征及主控因素。结果表明，栖霞组储层沿龙门山山前带呈北东-南西向展布，厚度在10~40 m；储层以台地边缘滩相的晶粒白云岩和少量颗粒白云岩为主；储集空间类型以溶蚀孔（洞）为主，裂缝次之；孔隙度频率分布主要集中在1.0%~4.0%，渗透率主要集中在0.001~10.000 mD；储集类型主要为裂缝-孔隙（洞）型储层。栖霞组储层的发育及分布主要受沉积相带、沉积古地貌、成岩作用及后期构造破裂等因素控制，沉积作用提供了储层发育的物质基础；沉积古地貌则控制了高能颗粒滩相的分布范围；准同生期淡水淋滤溶蚀不但形成了大量的次生溶蚀孔洞，还提供了白云石化流体运移的通道；埋藏白云石化作用最大限度地继承和保存了早期的孔洞系统；后期构造破裂形成的裂缝则进一步连通了孔洞系统。

关键词: 储层特征, 晶粒白云岩, 储层主控因素, 中二叠统栖霞组, 双鱼石构造

Abstract: For the characteristics and main controlling factors of dolomite reservoir in Qixia Formation of Shuangyushi structure in northwestern Sichuan Basin, based on field outcrop, core and well logging data, combined thin section analysis, casting thin section, SEM, cathodoluminescence, this paper analyzes the development characteristics and main controlling factors of dolomite reservoirs in this area. The results show that the reservoirs are distributed in the NE-SW direction along the front of the Longmenshan mountain, with a thickness between 10 and 40 m. The reservoirs which develop in the shoal of platform margin facies are mainly crystalline dolomites, followed by a small amount of grain dolomites; The reservoir spaces are dominated by dissolution pores (vugs), followed by a small amount of cracks; The porosity of Qixia Formation reservoirs ranges from 1% to 4%, the permeability ranges from 0.001 mD to 10.000 mD; the reservoir types are mainly fracture-pore (vug) type. The development and distribution of reservoirs are controlled by sedimentary facies, sedimentary paleogeomorphology, diagenesis, and late tectonic fracture. Sedimentation provides the material basis for reservoir development and sedimentary highlands of paleogeomorphology control the distribution of high-energy shoal area; Penecontemporaneous atmospheric water eluviation not only forms a large number of secondary dissolution pores (vugs), but also provides migration pathway for the fluid of dolomitization; The early pores (vugs) are maximally inherited and preserved during the stage of the shallow burial dolomitization; The cracks formed by the late tectonic fracture further connect the pores (vugs) system.

Key words: reservoir characteristics, crystalline dolomites, main controlling factors, Middle Permian Qixia Formation, Shuangyushi structure

中图分类号:

TE122

彭先, 彭军, 张连进, 林攀, 兰雪梅. 双鱼石构造栖霞组白云岩储层特征及主控因素[J]. 西南石油大学学报(自然科学版), 2020, 42(5): 1-12.

PENG Xian, PENG Jun, ZHANG Lianjin, LIN Pan, LAN Xuemei. Characteristics and Main Controlling Factors of the Middle Permian Qixia Formation Reservoir in Shuangyushi Structure[J]. 西南石油大学学报(自然科学版), 2020, 42(5): 1-12.

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双鱼石构造栖霞组白云岩储层特征及主控因素

Characteristics and Main Controlling Factors of the Middle Permian Qixia Formation Reservoir in Shuangyushi Structure

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