涡轮钻具在麦1区安全应用可行性评价

Feasibility assessment of safe application of turbine drill in block Mai 1

潘丽娟 刘彪

Pan Lijuan Liu Biao

中国石油化工股分有限公司 西北油田分公司 工程技术研究院,乌鲁木齐 830011

Institute of Engineering Technology, SINOPEC Northwest Oilfield Company, Urumqi, Xinjiang 830011, China

为达到提速提效的目的，计划在麦盖提1区运用涡轮钻井工艺，然而该区开派兹雷克组火成岩地层机械钻速低，部分井段易坍塌掉块容易引起卡钻，因此需要对其可行性进行论证。通过分析火成岩掉块大小、坍塌时间、测井曲线等资料，了解坍塌周期、掉块岩屑尺寸和数量比例，确定掉块井段，并根据麦1区井身结构要求，从优化钻具组合与携岩角度出发，分析采用139.7 mm钻杆在钻井泵泵压允许条件下，降低循环压耗，提高环空返速，确定掉块岩屑安全携带出井的极限井深和排量，降低掉块导致卡钻风险的问题。实现了涡轮钻具在火成岩地层安全快速钻井的目的。

The technique of turbine drill has been planned to apply in block Mai 1 in order to improve production efficiency; however, due to the low ROP in igneous rocks in the Kaipaizileik Formation, collapse may happen in some wells and cause drilling stuck. So it is necessary to carry out a feasibility assessment. Through the analysis of igneous rock size, falling collapse time and log data, the debris falling collapse cycle, size and quantity proportion have been realized and the falling well section has been defined. According to the request of well bore structure of block Mai 1, from the viewpoints of optimizing assembly and carrying rock, we analyze how to use 139. 7 mm drill pipe under the condition of pump pressure to allow and reduce circulating pressure loss, improve annular return velocity, determine debris falling security to carry out the limit of well depth and pump rate, and finally reduce the risk of drilling stuck. The purpose of using turbine drill in igneous rock formation drilling safely and quickly has been achieved.

https://doi.org/10.11781/sysydz2013S1133