基于产能差异的气井开发早期产量劈分方法

淦文杰; 吉礼东; 袁权; 刘荣和; 王永强; 张骞; 汪煜昆

doi:10.3969/j.issn.1006-6535.2024.06.012

特种油气藏 >

2024 , Vol. 31 >Issue 6: 100 - 105

DOI: https://doi.org/10.3969/j.issn.1006-6535.2024.06.012

油藏工程

基于产能差异的气井开发早期产量劈分方法

淦文杰 ,
吉礼东 ,
袁权 ,
刘荣和 ,
王永强 ,
张骞 ,
汪煜昆

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1.中国石油西南油气田分公司,四川遂宁 629000;
2.四川页岩气勘探开发有限责任公司,四川内江 641000;
3.中国石油川庆钻探工程有限公司,四川成都 610000;
4.中海石油(中国)有限公司海南分公司,海南海口 570312

淦文杰(1991—),女,工程师,2014年毕业于西南石油大学石油工程专业,现主要从事试井解释、气藏动态分析等方面的研究工作。

收稿日期: 2023-06-12

修回日期: 2024-08-20

网络出版日期: 2025-01-22

基金资助

国家自然科学基金联合基金“海上高温高压低渗透储层渗流流固耦合机理及表征方法研究”(U22B2073)

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Production Splitting Method of Early Gas Well Development Based on Productivity Difference

Gan Wenjie ,
Ji Lidong ,
Yuan Quan ,
Liu Ronghe ,
Wang Yongqiang ,
Zhang Qian ,
Wang Yukun

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1. Petrochina Southwest Oil & Gas Field Company,Suining,Sichuan 629000,China;
2. Sichuan Shale Gas Exploration and Development Co.,Ltd,Neijiang,Sichuan 641000,China;
3. Chuanqing Drilling Engineering Company Limited,Chengdu,Sichuan 610000,China;
4. CNOOC (China) Co.,Ltd.Hainan Branch,Haikou,Hainan 570312,China

Received date: 2023-06-12

Revised date: 2024-08-20

Online published: 2025-01-22

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摘要

气井产气量是多层合采气井评价各产层动用情况的基础参数。为解决多层合采气井的小层产量劈分不准确的难题,基于气层产能差异与物质平衡原理,根据储层地质参数和生产动态数据,对处于不稳定渗流阶段的气井进行产量劈分,形成了一种基于产能差异的多层合采气井早期产量劈分方法,并以两层合采井为例构建数值模型,验证了该方法的精度。研究结果表明:对于投产5 a的气井,基于产能差异的产量劈分方法与数值模拟法相比,计算结果的相对误差小于5%,准确性较高;与仅考虑静态参数的KH法相比,该方法计算精度大幅提高;由于误差累积效应,该方法不适用于长期预测。基于产能差异的气井开发早期产量劈分方法可快速获取开发早期合采气井各小层的产量,为合采气井产量的准确劈分提供了新的计算思路。

关键词： 多层合采气井; 产能差异; 物质平衡方程; 产量劈分; 数值模拟

本文引用格式

淦文杰 , 吉礼东 , 袁权 , 刘荣和 , 王永强 , 张骞 , 汪煜昆 . 基于产能差异的气井开发早期产量劈分方法[J]. 特种油气藏, 2024 , 31(6) : 100 -105 . DOI: 10.3969/j.issn.1006-6535.2024.06.012

Abstract

Gas production serves as the fundamental parameter for assessing the output of each production layer in multi-layer commingled gas wells.To address the issue of inaccurate production splitting in multi-layer commingled gas wells,based on the gas layer productivity difference and material balance principle,according to reservoir geological parameters and production dynamic data,the production splitting of gas wells during the unstable flow stage is carried out,and an early production splitting method of multi-layer commingled gas wells based on productivity difference is formed.Taking two-layer commingled wells as an example,a numerical model is established to verify the accuracy of the method.The results indicate that the relative error of the calculation results of the production splitting method based on the productivity difference is less than 5% in comparison with the numerical simulation method for the gas wells that have been in production for 5 years,and the accuracy is higher.Compared with the KH method which merely considers the static parameters,the calculation accuracy of this method has been significantly improved.Due to the error accumulation effect,this method is not applicable for long-term prediction.The early production splitting method of gas well development based on productivity difference can promptly obtain the production of each layer of early development,which provides a novel calculation concept for the accurate splitting of gas well production.

Key words： multi-layer commingled gas well; productivity differences; material balance equation; production splitting; numerical simulation

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