深水气井环雾流水合物沉积和堵塞动力学模型

doi:10.11885/j.issn.1674-5086.2020.05.20.01

西南石油大学学报(自然科学版) ›› 2022, Vol. 44 ›› Issue (1): 132-142.DOI: 10.11885/j.issn.1674-5086.2020.05.20.01

深水气井环雾流水合物沉积和堵塞动力学模型

董钊¹, 刁玉乾², 李中¹, 蒋东雷¹, 张攀锋³

1. 中海石油(中国)有限公司湛江分公司，广东湛江 524057;
2. 中海油研究总院有限责任公司，北京朝阳 100028;
3. 中国石油大学(华东)石油工程学院，山东青岛 266580

收稿日期:2020-05-20 发布日期:2022-01-25
通讯作者: 刁玉乾，E-mail：diaoyq2@cnooc.com.cn
作者简介:董钊, 1987年生，男，汉族，四川乐山人，工程师，硕士，主要从事海洋钻完井方面的设计和研究。E-mail：dongzhao2@cnooc.com.cn;
刁玉乾, 1993年生，男，汉族，山东青州人，硕士，主要从事海上油气开发工程设计、水合物防治和开发方面的研究。E-mail：diaoyq2@cnooc.com.cn;
李中, 1972年生，男，汉族，广东湛江人，教授级高级工程师，博士，主要从事海上油气井钻完井技术研究和管理工作。E-mail：lizhong@cnooc.com.cn;
蒋东雷, 1985年生，男，汉族，天津滨海新区人，工程师，主要从事钻完井方面的研究工作。E-mail：jiangdl2@cnooc.com.cn;
张攀锋, 1989年生，男，汉族，河南洛阳人，博士研究生，主要从事水合物和注气提高采收率方面的研究。E-mail：cctk0512@163.com
基金资助:
国家科技重大专项(2016ZX05028-001-09)

Kinetics Modeling of Gas Hydrate Deposition and Blockage at Annular-mist Flow State in Production Wells of Deep Water Gas Fields

DONG Zhao¹, DIAO Yuqian², LI Zhong¹, JIANG Donglei¹, ZHANG Panfeng³

1. Zhanjiang Branch, CNOOC China Limited, Zhanjiang, Guangdong 524057, China;
2. CNOOC Research Institute Co. Ltd., Chaoyang, Beijing 100028, China;
3. School of Petroleum Engineering, China University of Petroleum, Qingdao, Shandong 266580, China

Received:2020-05-20 Published:2022-01-25

摘要/Abstract

摘要： 深水气田开发过程中，海底附近井筒内具有水合物形成和堵塞的风险。基于井筒气液两相环雾流流动模式，根据气芯和液膜内水合物颗粒不同动力学特征，在液膜内考虑水合物颗粒的形成、运移和管壁黏附过程，同时在气芯内考虑水合物颗粒的形成、聚并、破碎和沉降行为，建立了井筒水合物动态沉积和堵塞的动力学模型，可以用于模拟和预测不同工况下井筒内水合物堵塞时间和堵塞位置。模型预测结果与水合物环路实验堵塞压降的相对误差小于10%。针对典型深水气田开发井案例，进行了井筒水合物形成和堵塞风险分析，得到了不同工况下井筒水合物层增长速率、沉积厚度分布和完全堵塞时间的变化规律。

关键词: 深水气田, 环雾流, 水合物, 动力学模型, 沉积堵塞

Abstract: During the production process of deep-water gas fields, gas hydrate can be formed in the wellbore near the wellhead at seabed, which can cause blockage of the production tubing. In this study, a gas-liquid two-phase annular-mist flow pattern is considered in the wellbore, and formation of hydrate particles in the gas core and the liquid films is assumed. A kinetics model for hydrate deposition and wellbore blockage is established, in which the formation, migration and wall adhesion of hydrate particles in the liquid film are considered, and the formation, coalescence, crushing and settling behaviors of hydrate particles are considered in the gas core. The model can be used to simulate and predict the hydrate blockage time and position in the wellbore under different operating conditions. The relative error between the model prediction results and the hydrate loop experiment blockage pressure drop is less than 10%. For a case study of a typical deep-water gas field, the risk analysis of wellbore hydrate formation and blockage is carried out, in which the growth rate of hydrate deposition layer in wellbore, its thickness distribution and complete blockage time are predicted.

Key words: deep-water gas field, annular-mist flow, gas hydrate, kinetics model, deposition and blockage

中图分类号:

TE53

董钊, 刁玉乾, 李中, 蒋东雷, 张攀锋. 深水气井环雾流水合物沉积和堵塞动力学模型[J]. 西南石油大学学报(自然科学版), 2022, 44(1): 132-142.

DONG Zhao, DIAO Yuqian, LI Zhong, JIANG Donglei, ZHANG Panfeng. Kinetics Modeling of Gas Hydrate Deposition and Blockage at Annular-mist Flow State in Production Wells of Deep Water Gas Fields[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2022, 44(1): 132-142.

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深水气井环雾流水合物沉积和堵塞动力学模型

Kinetics Modeling of Gas Hydrate Deposition and Blockage at Annular-mist Flow State in Production Wells of Deep Water Gas Fields

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