页岩气井三角图版法判别井筒积液研究

doi:10.3969/j.issn.1006-6535.2020.04.026

特种油气藏 ›› 2020, Vol. 27 ›› Issue (4): 168-174.DOI: 10.3969/j.issn.1006-6535.2020.04.026

• 钻采工程 • 上一篇

页岩气井三角图版法判别井筒积液研究

罗鑫¹, 王玉婷², 王学强³, 赵国军⁴, 陈满¹, 曾琳娟², 杨海³, 闫长辉²

1.四川长宁天然气开发有限责任公司,四川成都 610056;
2.油气藏地质及开发工程国家重点实验室,四川成都 610059;
3.四川圣诺油气工程技术服务有限公司,四川德阳 618300;
4.中国石油新疆油田分公司,新疆克拉玛依 834000

收稿日期:2019-11-03 修回日期:2020-04-21 出版日期:2020-08-25 发布日期:2022-02-18
通讯作者: 王玉婷(1996—),女,2018年毕业于成都理工大学石油工程专业,现为该校油气田开发工程专业在读硕士研究生,主要从事非常规油气储层评价及开发技术研究。
作者简介:罗鑫(1984—),男,工程师,2007年毕业于成都理工大学信息与计算科学专业,2010年毕业于该校油气田开发地质专业,获硕士学位,现主要从事气田开发生产管理工作。
基金资助:
国家自然科学基金“硬脆、塑性泥页岩微裂缝产生的岩石物理学机制基础研究”(41572130)

Shale Gas Wellbore Liquid Loading Identification Based on Triangle Plate

Luo Xin¹, Wang Yuting², Wang Xueqiang³, Zhao Guojun⁴, Chen Man¹, Zeng Linjuan², Yang Hai³, Yan Changhui²

1. Sichuan Changning Natural Gas Development Co., Ltd., Chengdu, Sichuan 610056, China;
2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (Southwest Petroleum University), Chengdu, Sichuan 610059, China;
3. Sichuan Shengnuo Oil and Gas Engineering Service Co., Ltd., Deyang, Sichuan 618300, China;
4. PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang 834000, China

Received:2019-11-03 Revised:2020-04-21 Online:2020-08-25 Published:2022-02-18

摘要/Abstract

摘要： 针对四川盆地页岩气田CN201井区大部分气井进入生产中后期,产能降低,携液能量不足,井底积液严重,气井采收率降低的问题,根据该区块生产特征,综合考虑积液敏感的井口压力、日产气量、水气比3个生产参数,对实际数据进行归一化或极值化处理以消除参数单位及数量级影响,绘制三角图版,分析散点分布规律,确定井筒积液区域。结果表明:井口压力占比为42.38%～76.39%、日产气量占比为0.0～51.5%、水气比占比为0.0～52.7%为CN201井区页岩气井积液判别区。流压测试结果显示三角图版准确程度为84.3%,证明该方法判别页岩气井积液可靠性高。该研究对确定气田现场排液时机、排液工艺类型及排液效果评价等提供了理论基础。

关键词: 页岩气, 井筒积液, 三角图版, 井口压力, 日产气量, 水气比, 判别方法

Abstract: In order to improve the productivity decline, insufficient liquid-carrying capacity, serious wellbore liquid loading, low recovery and other problems in the middle-late stage for the most gas wells in the Wellblock CN201 of shale gas field in Sichuan Basin, the actual production data were normalized and extremalized to eliminate the influence of parameter unit and magnitude order by comprehensively considering wellbore pressure, daily gas production and water-gas ratio according to the production performances. A triangle plate was given to analyze the scattered point distribution and determine the wellbore liquid loading area. Result indicates that the shale gas wellbore liquid loading zones for the Wellblock CN201 includes the wellhead pressure proportion is 42.38%～76.39%, the daily gas production proportion is 0.0～51.5% and the water-gas ratio proportion is 0.0～52.7%. Flowing pressure test indicates a accuracy of 84.3% for this triangle plate, which is highly reliable to identify shale gas wellbore liquid loading. This research could provide certain theoretical reference for determining on-site liquid discharge timing, liquid discharge process and liquid discharge performance evaluation.

Key words: shale gas, wellbore liquid loading, triangle plate, wellhead pressure, daily gas production, water-gas ratio, identification method

中图分类号:

TE375

罗鑫, 王玉婷, 王学强, 赵国军, 陈满, 曾琳娟, 杨海, 闫长辉. 页岩气井三角图版法判别井筒积液研究[J]. 特种油气藏, 2020, 27(4): 168-174.

Luo Xin, Wang Yuting, Wang Xueqiang, Zhao Guojun, Chen Man, Zeng Linjuan, Yang Hai, Yan Changhui. Shale Gas Wellbore Liquid Loading Identification Based on Triangle Plate[J]. Special Oil & Gas Reservoirs, 2020, 27(4): 168-174.

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页岩气井三角图版法判别井筒积液研究

Shale Gas Wellbore Liquid Loading Identification Based on Triangle Plate

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