An experimental evaluation method of drilling fluid lost control efficiency considering loss types

Frontiers in Physics

Physics

Chong Lin¹  Xiaojiang Cui²  Yunhui Deng²  Jingyi Zhang³  Xiaopeng Yan⁴  Chengyuan Xu⁵  Yili Kang⁵ 

[1] CCDC Drilling and Production Technology Research Institute, Guanghan, China;China Zhenhua Oil Co., Ltd., Beijing, China;China Zhenhua Oil Co., Ltd., Beijing, China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, China;School of Petroleum and Natural Gas Engineering, Changzhou University, Changzhou, China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, China;

关键词: lost circulation;    fractured reservoir;    loss control;    reservoir protection;    lost circulation formula;    evaluation method;   

DOI  :  10.3389/fphy.2023.1079345

 received in 2022-10-25, accepted in 2023-04-18,  发布年份 2023

来源: Frontiers

【 摘 要 】

There are serious drilling fluid loss problems in fractured reservoirs during drilling and completion. Indoor evaluation of the drilling fluid lost control effect is an important basis for on-site plugging formula design, but there are some problems in drilling fluid lost control evaluation, such as the inability to evaluate specific loss types. Therefore, based on the classification of loss causes, this paper defines the main control factors of drilling fluid lost control efficiency of different loss types and puts forward a method for recognizing loss types. The influence of fracture module and experimental steps on the drilling fluid lost control efficiency was evaluated through laboratory experiments. Based on the analysis method of indoor and field drilling fluid lost control efficiency, the best laboratory experimental conditions of different loss types were recommended, and then, the experimental evaluation method of the drilling fluid lost control efficiency considering various loss types was established. This method can comprehensively evaluate and grade the lost control ability of the plugging formula. Through the verification in Block K of the Tarim Basin, the test results are closer to the field lost control results, and the evaluation results of the drilling fluid lost control efficiency are better, which can guide the field leakage control evaluation.

【 授权许可】

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Copyright © 2023 Zhang, Kang, Deng, Xu, Yan, Lin and Cui.