欠平衡钻井条件下含气层识别方法研究

RECOGNITION OF GAS-BEARING RESERVOIR WITH UNDERBALANCE DRILLING METHOD

鲍云杰 彭苏萍 汪玉泉 陈代伟 王树学 何宝林

Bao Yunjie Peng Suping Wang Yuquan Chen Daiwei Wang Shuxue He Baolin

中国矿业人学资源与安全工程学院, 北京, 100083 2. 中国石化石油勘探开发研究院, 无锡石油地质研究所, 江苏, 无锡, 214151 3. 大庆油田地质录井分公司, 黑龙江, 大庆, 163411

School of Resources and Safety Engineering, CUMT, Beijing 100083, China 2. Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214151, China 3. Logging Company, Daqing Oilfield, Daqing, Heilongjiang 163411, China

欠平衡钻井是天然气钻探最有效的钻井工艺技术之一,在大港、大庆油田等勘探区域成效显著.欠平衡钻井过程中,气层钻开后,气测井的背景值大幅抬高,甚至达到饱和状态,导致后续气层无法识别.在分析气测井技术局限性的基础上,针对欠平衡钻井工艺的特点,探讨了通过对岩屑进行破碎、脱气和含气分析,对地层含气情况进行识别和评价的方法,并给出了应用实例.

Underbalance drilling is one of the most effective drilling technologies in natural gas exploration.Good results have been made in the prospecting areas of Dagang Oilfield and Daqing Oilfield,et al.Some forward requirements for the identification and evaluation of geological logging with drilling gas-bearing reservoirs have been carried out by the application of underbalance drilling technology.In this paper,the localization of logging techniques for gas has been analyzed,and the application method of cutting gas analysis technology for recognition gas-bearing reservoirs in natural gas exploration has been discussed on the basis of characteristics of underbalance drilling technology,and some application examples have been shown.

https://doi.org/10.11781/sysydz200503312