鄂尔多斯盆地清涧地区上古生界致密砂岩孔喉结构对天然气渗流能力的影响

doi:10.3969/j.issn.1006-6535.2026.03.003

特种油气藏 ›› 2026, Vol. 33 ›› Issue (3): 24-33.DOI: 10.3969/j.issn.1006-6535.2026.03.003

鄂尔多斯盆地清涧地区上古生界致密砂岩孔喉结构对天然气渗流能力的影响

丛琳^1,2, 史亚宁¹, 范毅君³, 胡爱平³, 史云鹤⁴, 蔡洪波⁵, 文慧俭²

1.东北石油大学地球科学学院,黑龙江大庆 163318;
2.东北石油大学三亚海洋油气研究院,海南三亚 57202;
3.中国石油长庆油田分公司勘探事业部,陕西西安 710018;
4.中国石油长庆油田分公司勘探开发研究院,陕西西安 710018;
5.中国石油辽河油田分公司开发事业部,辽宁盘锦 124010

收稿日期:2025-04-07 修回日期:2026-03-13 出版日期:2026-06-25 发布日期:2026-09-04
通讯作者: 史亚宁(2000—),男,2023年毕业于河北地质大学勘查技术与工程专业,现为东北石油大学矿物学、岩石学、矿床学专业在读硕士研究生,主要从事油气田开发地质学方面的研究。
作者简介:丛琳(1983—),女,副教授,2005年毕业于大庆石油学院通信工程专业,2011年毕业于东北石油大学地质资源与地质工程专业,获博士学位,现主要从事油气田开发地质方面的研究工作。
基金资助:
海南省科技专项“深海碎屑岩次生孔隙形成机制及分布预测——以珠江口盆地文昌凹陷为例”(ZDYF2024GXJS015)

Influence of pore-throat structure on natural gas flow capacity in Upper Paleozoic tight sandstones in the Qingjian Area,Ordos Basin

CONG Lin^1,2, SHI Ya'ning¹, FAN Yijun³, HU Aiping³, SHI Yunhe⁴, CAI Hongbo⁵, WEN Huijian²

1. School of Earth Sciences,Northeast Petroleum University,Daqing,Heilongjiang 163318,China;
2. NEPU Sanya Offshore Oil & Gas Research Institute,Sanya,Hainan 572025,China;
3. Exploration Division,PetroChina Changqing Oilfield Company,Xi'an,Shaanxi 710018,China;
4. Exploration and Development Research Institute,PetroChina Changqing Oilfield Company,Xi'an,Shaanxi 710018,China;
5. Development Division,PetroChina Liaohe Oilfield Company,Panjin,Liaoning 124010,China

Received:2025-04-07 Revised:2026-03-13 Online:2026-06-25 Published:2026-09-04

摘要/Abstract

摘要： 针对清涧地区低产井多且产水现象普遍的问题,通过恒速压汞、气水相渗实验,对研究区盒8、山2段致密砂岩气储层物性和孔隙特征进行研究。明确了孔隙大小、分布及喉道形态、连通性等关键参数对天然气渗流能力的控制作用。结果表明:研究区储层整体呈低孔低渗特征;山2₃亚段渗透率大于1.00 mD的样品频率高于盒8段,且岩石类型、填隙物及孔喉结构均优于盒8段。研究证实孔隙度是油气富集的决定性因素,而孔喉两者的结构匹配度直接决定储层渗流能力;同时,储层致密程度与束缚水饱和度成正相关,孔隙结构越复杂,天然气渗流能力越弱。该研究为区域致密砂岩气储层评价及开发提供了重要技术依据。

关键词: 鄂尔多斯盆地, 清涧地区, 致密砂岩气, 渗流能力, 孔喉结构, 束缚水饱和度

Abstract: In view of the large number of low-production wells and the widespread occurrence of water production in the Qingjian area,constant-rate mercury injection and gas-water relative permeability experiments were carried out to investigate the petrophysical properties and pore characteristics of tight sandstone gas reservoirs in the He 8 and Shan 2 members in the study area.The study clarified the controlling effects of key parameters,including pore size,distribution,throat morphology,and connectivity,on natural gas flow capacity.The results show that the reservoirs in the study area are characterized overall by low porosity and low permeability.Among them,samples from the Shan 2₃ Submember with permeability greater than 1.00 mD occur at a higher frequency than those from the He 8 Member,and their rock type,interstitial materials and pore-throat structure are all superior to those of the He 8 Member.The study confirms that porosity is the decisive factor governing hydrocarbon enrichment,whereas the structural matching between pores and throats directly determines reservoir flow capacity.At the same time,reservoir tightness is positively correlated with bound water saturation,which directly weakens natural gas flow capacity.This study provides an important technical basis for the evaluation and development of regional tight sandstone gas reservoirs.

Key words: Ordos Basin, Qingjian Area, tight sandstone gas, flow capacity, pore-throat structure, bound water saturation

中图分类号:

TE122

丛琳, 史亚宁, 范毅君, 胡爱平, 史云鹤, 蔡洪波, 文慧俭. 鄂尔多斯盆地清涧地区上古生界致密砂岩孔喉结构对天然气渗流能力的影响[J]. 特种油气藏, 2026, 33(3): 24-33.

CONG Lin, SHI Ya'ning, FAN Yijun, HU Aiping, SHI Yunhe, CAI Hongbo, WEN Huijian. Influence of pore-throat structure on natural gas flow capacity in Upper Paleozoic tight sandstones in the Qingjian Area,Ordos Basin[J]. Special Oil & Gas Reservoirs, 2026, 33(3): 24-33.

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鄂尔多斯盆地清涧地区上古生界致密砂岩孔喉结构对天然气渗流能力的影响

Influence of pore-throat structure on natural gas flow capacity in Upper Paleozoic tight sandstones in the Qingjian Area,Ordos Basin

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