疏松砂岩储层近井防砂区域压降评价与参数优化

尹彬; 董长银; 李高峰; 任世君; 李冲; 刘有闯; 李振东; 李娜

doi:10.3969/j.issn.1006-6535.2025.06.018

特种油气藏 >

2025 , Vol. 32 >Issue 6: 150 - 157

DOI: https://doi.org/10.3969/j.issn.1006-6535.2025.06.018

钻采工程

疏松砂岩储层近井防砂区域压降评价与参数优化

尹彬 ,
董长银 ,
李高峰 ,
任世君 ,
李冲 ,
刘有闯 ,
李振东 ,
李娜

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1.中国石油大学华东,山东青岛 266580;
2.中国石油华北油田分公司,河北任丘 062552;
3.中国石油青海油田分公司,甘肃敦煌 736200

尹彬(2001—),男,2023年毕业于中国石油大学(华东)石油工程专业,现为该校石油与天然气工程专业在读硕士研究生,主要从事油气井防砂完井方面的学习与研究工作。

收稿日期: 2024-07-11

修回日期: 2025-07-30

网络出版日期: 2025-12-31

基金资助

中国石油科技攻关项目“老气田‘压舱石工程’关键技术研究与示范”(2023YQX10310)

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Pressure drop evaluation and parameter optimization in near-well sand-control zones of loose sandstone reservoirs

YIN Bin ,
DONG Changyin ,
LI Gaofeng ,
REN Shijun ,
LI Chong ,
LIU Youchuang ,
LI Zhendong ,
LI Na

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1. China University of PetroleumEast China,Qingdao,Shandong 266580,China;
2. Huabei Oilfield Company,PetroChina,Renqiu,Hebei 062552,China;
3. Qinghai Oilfield Company,PetroChina,Dunhuang,Gansu 736200,China

Received date: 2024-07-11

Revised date: 2025-07-30

Online published: 2025-12-31

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摘要

针对疏松砂岩储层出砂堵塞导致压力升高的问题,开展53组近井防砂区域压降测试实验,评估了筛管区、环空充填区和裂缝区的压降演化特征。研究表明,不同防砂区域的近井压降差异显著:投产初期筛管区压降较小(0.002~0.016 MPa),但随着砂粒逐步堵塞筛管及筛套环空,压降迅速升至0.200 ~3.000 MPa;环空充填区初期压降仅为0.002~0.030 MPa,但在砂粒持续侵入下,堵塞后压降最高可增长50倍;在裂缝区缝宽越大,压降越低,且常规陶粒组的压降最低,仅为疏水陶粒组和石英砂组的60%和96%。综合实验结果,筛管区宜在生产初期适当释放细砂,以促使粗砂优先堆积并形成稳定通道,针对该目标储层,优先推荐0.200 mm精密筛管;环空充填区应合理匹配砾石粒径,并优选涂覆砂以提升抗堵性能;裂缝区则建议采用缝宽大于20 mm的支撑结构,并优选大粒径常规陶粒,以有效降低近井压差。该研究结果为防砂工艺优化与低压降开发提供了技术支撑。

关键词： 疏松砂岩储层; 筛管区; 环空充填区; 裂缝区; 防砂区域; 压降

本文引用格式

尹彬 , 董长银 , 李高峰 , 任世君 , 李冲 , 刘有闯 , 李振东 , 李娜 . 疏松砂岩储层近井防砂区域压降评价与参数优化[J]. 特种油气藏, 2025 , 32(6) : 150 -157 . DOI: 10.3969/j.issn.1006-6535.2025.06.018

Abstract

Addressing the issue of sand-induced wellbore plugging leading to elevated pressure drop in loose sandstone reservoirs,53 near-well sand-control zone pressure drop tests were conducted to evaluate the evolution of pressure drop in three sand-control zones:the wire-wrapped screen section,the gravel-pack annular section, and the fracture section.Results indicated significant differences among these zones:in the screen section, initial pressure drop was small(0.002-0.016 MPa)but rose rapidly to 0.200-3.000 MPa as particles gradually clogged the screen and outer annulus;in the gravel-pack section,initial pressure drop was only 0.002-0.030 MPa but could increase up to 50-fold under sustained sand intrusion;in the fracture section,wider fracture widths yielded lower pressure drops,and for a conventional ceramic proppant pack the pressure drop was lowest-only 60% and 96% of that in the hydrophobic ceramic and quartz sand packs,respectively.Combining these results,it is recommend that in the screen zone fine sand be released early in production to allow coarse sand to accumulate first and establish stable channels,and that 0.200 mm precision screens be used.In the gravel-pack zone,the gravel size should be reasonably matched,and coated sand should be preferred to enhance blockage resistance.In the fracture zone,propped fractures wider than 20 mm with large-particle conventional ceramic proppant are recommended to effectively reduce near-well pressure differentials.These findings provide technical support for optimizing sand-control processes and low-pressure development.

Key words： loose sandstone reservoir; screen zone; annular pack zone; fracture zone; sand-control region; pressure drop

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