四川盆地蓬莱气田寒武系龙王庙组优质储层特征及主控因素

doi:10.12108/yxyqc.20250604

岩性油气藏 ›› 2025, Vol. 37 ›› Issue (6): 35–47.doi: 10.12108/yxyqc.20250604

四川盆地蓬莱气田寒武系龙王庙组优质储层特征及主控因素

李勇¹, 张亚¹, 周刚¹, 屈海洲^2,3, 龙虹宇¹, 李成龙¹, 张驰¹, 陈迪¹

1. 中国石油西南油气田公司勘探开发研究院, 成都 610041;
2. 西南石油大学油气藏地质及开发工程国家重点实验室, 成都 610500;
3. 西南石油大学地球科学与技术学院, 成都 610500

收稿日期:2025-06-13 修回日期:2025-08-25 出版日期:2025-11-01 发布日期:2025-11-07
第一作者:李勇（1986—），男，博士，高级工程师，主要从事沉积储层地质学方面的研究工作。地址：（610041）四川省成都市高新区天府大道12号。Email：lyong2019@petrochina.com.cn。
通信作者: 张亚(1987—),男,硕士,高级工程师,主要从事油气地质综合方面的研究工作。Email:zhangya08@petrochina.com.cn。
基金资助:
中国石油天然气股份有限公司重大科技专项“海相碳酸盐岩油气规模增储上产与勘探开发技术研究”（编号：2023ZZ16YJ01）和中国石油西南油气田公司科技项目“扬子西缘震旦系—下古生界碳酸盐岩含油气系统研究”（编号：2025D00101）联合资助。

Characteristics and main controlling factors of high-quality reservoirs in Cambrian Longwangmiao Formation of Penglai Gasfield, Sichuan Basin

LI Yong¹, ZHANG Ya¹, ZHOU Gang¹, QU Haizhou^2,3, LONG Hongyu¹, LI Chenglong¹, ZHANG Chi¹, CHEN Di¹

1. Exploration and Development Research Institute, PetroChina Southwest Oil & Gasfield Company, Chengdu 610041, China;
2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China;
3. School of Geosciences and Technology, Southwest Petroleum University, Chengdu 610500, China

Received:2025-06-13 Revised:2025-08-25 Online:2025-11-01 Published:2025-11-07

摘要/Abstract

摘要： 近年来，川中北部蓬莱气田的东坝1井在寒武系龙王庙组测试获得工业气流。基于岩心、薄片、阴极发光、常规测井、成像测井、地球化学数据等相关资料，系统研究了川中北部蓬莱气田龙王庙组储层特征、成因及分布规律。研究结果表明：①蓬莱气田龙王庙组优质储层岩性以鲕粒云岩为主，砂屑云岩次之；储集空间以溶洞、针状溶孔、残余粒间溶孔和粒内溶孔为主，伴生少量裂缝，整体孔隙度主要为2%~6%，渗透率主要为0.001~1.000 mD，属低孔-低渗储层；可划分为溶洞型（平均孔隙度和渗透率分别为4.2%，0.209 mD）、溶孔型（平均孔隙度和渗透率分别为3.6%，0.052 mD）和孔隙型（平均孔隙度和渗透率分别为3.0%，0.034 mD）3类，其中前二者为优质储层。②优质储层的发育主要受沉积相、准同生大气淡水溶蚀作用、准同生白云石化作用、浅埋藏顺层岩溶作用和构造破裂作用的影响，其中浅埋藏岩溶作用对研究区西部优质储层的影响尤为显著。③优质储层主要分布于西部PS15井区，厚度普遍大于10 m，局部超过30 m；优质储层在东部PS8—PY1井区亦有分布，厚度一般为8~15 m。

关键词: 鲕粒白云岩, 缝洞型碳酸盐岩储层, 岩溶作用, 白云石化作用, 龙王庙组, 寒武系, 蓬莱气田, 四川盆地

Abstract: In recent years, well Dongba 1 in Penglai Gasfield in central and northern Sichuan Basin has obtained industrial gas flow through testing in Cambrian Longwangmiao Formation. Based on relevant data such as core samples, thin sections, cathodoluminescence, conventional logging, imaging logging, and geochemical information, the reservoir characteristics, genesis, and distribution patterns of Longwangmiao Formation in Penglai Gasfield, northern central Sichuan Basin were systematically studied. The results show that: (1) The high-quality reservoir of Longwangmiao Formation in Penglai Gasfield are mainly composed of oolitic dolomite, followed by doloarenite. The reservoir space is primarily karst caves, needle-like dissolved pores, residual intergranular dissolved pores, and intragranular dissolved pores, accompanied by a few fractures. The overall porosity mainly ranges from 2% to 6%, and permeability is mainly 0.001-1.000 mD, characterized as a low-porosity and low-permeability reservoir. The reservoir types of Longwangmiao Formation can be divided into karst cave type(with an average porosity of 4.2% and permeability of 0.209 mD), dissolved pore type(with an average porosity of 3.6% and permeability of 0.052 mD)and pore type(with an average porosity of 3.0% and permeability of 0.034 mD), with the former two being high-quality reservoirs.(2) The development of high-quality reservoirs is mainly influenced by sedimentary facies, penecontemporaneous meteoric water dissolution, penecontem-poraneous dolomitization, shallow buried bedding karstification, and structural fractures. Among them, shallow buried karstification has significant impact on high-quality reservoirs in the western study area.(3) High-quality reservoirs are mainly distributed in the PS15 wellblock in the western region, with thickness generally over 10 m and locally exceeding 30 m. They are also distributed in the PS8-PY1 wellblock in the eastern region, with thickness generally ranging from 8 m to 15 m.

Key words: oolitic dolomite, fracture-vuggy carbonate reservoir, karstification, dolomitization, Longwangmiao Formation, Cambrian, Penglai Gasfield, Sichuan Basin

中图分类号:

TE122

李勇, 张亚, 周刚, 屈海洲, 龙虹宇, 李成龙, 张驰, 陈迪. 四川盆地蓬莱气田寒武系龙王庙组优质储层特征及主控因素[J]. 岩性油气藏, 2025, 37(6): 35–47.

LI Yong, ZHANG Ya, ZHOU Gang, QU Haizhou, LONG Hongyu, LI Chenglong, ZHANG Chi, CHEN Di. Characteristics and main controlling factors of high-quality reservoirs in Cambrian Longwangmiao Formation of Penglai Gasfield, Sichuan Basin[J]. Lithologic Reservoirs, 2025, 37(6): 35–47.

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四川盆地蓬莱气田寒武系龙王庙组优质储层特征及主控因素

Characteristics and main controlling factors of high-quality reservoirs in Cambrian Longwangmiao Formation of Penglai Gasfield, Sichuan Basin

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