水平井压后示踪剂监测技术应用研究  

Application of Tracer Monitoring Technology after Fracturing in Horizontal Well

作　　者：邓大伟 Deng Dawei(Research Institute of Oil Production Engineering,Daqing Oilfield Co.,Ltd.,Daqing Heilongjiang 163454;Heilongjiang Provincial Key Laboratory of Oil and Gas Reservoir Stimulation,Daqing Heilongjiang 163454)

机构地区：[1]中国石油大庆油田有限责任公司采油工程研究院,黑龙江大庆163454 [2]黑龙江省油气藏增产增注重点实验室,黑龙江大庆163454

出　　处：《中外能源》2021年第4期48-51,共4页Sino-Global Energy

摘　　要：多段压裂广泛应用于非常规储层,用于提升油气井的产量。但很难对压后储层改造效果进行准确评价。为此,本文采用了一种气示踪剂对水平井多段压裂每段的产气贡献占比进行测量分析。研究结果表明:根据气示踪剂的特性确定气示踪剂检测的极限浓度为50×10^(-12)μg/mL,气示踪剂能有效得出各段压后产气贡献率占比;气示踪剂测量的产气贡献占比与测井综合解释结果吻合,干层测得的产气贡献占比均较低,气层的产气贡献占比最高;W井中产气贡献占比大于3%的有12段,合计产气贡献率为80.1%,为该井主要产气层段;产气贡献大于等于1%小于3%的小段,合计产气贡献率为16.95%;产气小于1%的小段,合计产气贡献率为1.95%。建立的计算方法能够准确确定各段示踪剂用量,研究结果和方法可为进一步优化压裂施工参数提供依据。Multi-stage fracturing is widely used in unconventional reservoirs to increase the production of oil and gas wells.However,it is difficult to accurately evaluate the effect of stimulation after fracturing.Therefore,a gas tracer is used in this paper to measure and analyze the contribution ratio of gas production in each stage of multi-stage fracturing of the horizontal well.The results show that limit concentration of the gas tracer monitoring is determined to be 50×10^(-12)μg/mL according to the characteristics of the gas tracer.The gas tracer can effectively obtain the contribution ratio of gas production after each stage of fracturing.The gas production contribution ratio measured by the gas tracer is consistent with the comprehensive logging interpretation results.The gas production contribution ratio measured in the dry layer is low,and that measured in the gas reservoir is the highest.In Well W,there are 12 stages with gas production contribution ratio of more than 3%,and total gas production contribution ratio is 80.1%,these stages are the main gas producing intervals of the well.For the stages with the gas production contribution ratio greater than or equal to 1%and less than 3%,the total gas production contribution ratio is 16.95%;for the stages with the gas production contribution ratio of less than 1%,the total gas production contribution ratio is 1.95%.The established calculation method can accurately determine the tracer dosage in each stage,and the research results and methods can provide basis for further optimization of fracturing parameters.

关 键 词：多段压裂 储层改造效果 气示踪剂 产气贡献率 示踪剂用量 

分 类 号：TE357.12[石油与天然气工程—油气田开发工程]