Formation damage is commonly known as a great cause for the production decline, owing to the unclear formation damage mechanisms under the reservoir geological and engineering conditions. This paper aims to develop a formation damage control technology during drilling for the protection of the natural productivity of saline-lacustrine reservoir. Reservoir geological characterization is first presented, including formation mineralogy, petrophysical properties, and fracture developing features. Fluid and stress sensitivity and in situ drilling fluid damage are experimentally evaluated under the simulated reservoir conditions. Successively, formation damage mechanisms during drilling are comprehensively summarized based on the evaluation results. It is believed that lost circulation is the main reason for formation damage, which further induce other damage. Given the formation damage mechanisms, principles of formation damage control technology for saline-lacustrine carbonate reservoir are explored, and in situ drilling fluids are optimized. The optimized drilling fluids are validated by lab experiments and field trials in Qaidam Basin. Field trials indicate that daily decline rate of productivity is decreased and per-well daily yield is increased by 7.7% year-on-year by using the optimized drilling fluids. This work could provide an effective guideline of formation damage control for saline-lacustrine reservoirs.

由于在储层地质和工程条件下不清楚的地层破坏机理，地层破坏通常被认为是产量下降的主要原因。本文旨在开发一种钻井过程中的地层破坏控制技术，以保护盐湖相储层的自然生产力。首先介绍了储层的地质特征，包括地层矿物学，岩石物理特性和裂缝发育特征。在模拟油藏条件下，通过实验评估了流体和应力敏感性以及原位钻井液的损害。随后，根据评估结果，总结了钻井过程中的地层破坏机理。人们认为，漏油是造成地层损坏的主要原因，进一步造成其他损害。给出了地层破坏机理，探讨了盐湖相碳酸盐岩储层的地层破坏控制技术原理，并优化了现场钻井液。通过在柴达木盆地的实验室实验和现场试验对优化的钻井液进行了验证。现场试验表明，通过使用优化的钻井液，生产率的每日下降率下降，每口井的每日产量同比增长7.7％。这项工作可以为控制盐湖相储层的地层破坏提供有效的指导。通过在柴达木盆地的实验室实验和现场试验对优化的钻井液进行了验证。现场试验表明，通过使用优化的钻井液，生产率的每日下降率下降，每口井的每日产量同比增长7.7％。这项工作可以为控制盐湖相储层的地层破坏提供有效的指导。通过在柴达木盆地的实验室实验和现场试验对优化的钻井液进行了验证。现场试验表明，通过使用优化的钻井液，生产率的每日下降率下降，每口井的每日产量同比增长7.7％。这项工作可以为控制盐湖相储层的地层破坏提供有效的指导。