低渗透裂缝性油藏水驱窜流通道精细识别方法研究  

Study on Fine Identification Method of Flooding Channeling Channel in Low Permeability Fractured Reservoir

作　　者：李承龙[1] Li Chenglong(Exploration&Development Research Institute of Daqing Oilfield Company Ltd.,Daqing Heilongjiang 163712,China)

机构地区：[1]中国石油大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《石油化工高等学校学报》2021年第3期38-44,共7页Journal of Petrochemical Universities

基　　金：国家科技重大专项“外围油田改善开发效果及提高采收率技术研究与应用”(2016E-0209)。

摘　　要：目前,针对低渗透裂缝性油藏未形成完善的窜流通道识别方法,应用中存在评价指标体系不符合矿场实际、识别方法具有较强局限性、在小层级识别结果存在较大误差等问题。针对此类问题,通过深化低渗透裂缝性油藏窜流特征,引入砂体对应关系、单井小层渗透率等指标,构建评价体系,利用模糊数学分析法和主客观组合赋权法,建立窜流通道识别模型,分析单井小层指标,精细识别小层窜流通道,并进行矿场验证。结果表明,由于分析了压敏效应、启动压力梯度影响,首次引入砂体对应关系等指标,评价体系及识别结果更符合矿场实际;共识别出窜流通道9条,由于施工因素影响,1条窜流通道未识别。识别结果与矿场实际基本吻合,证明了所建方法的准确性,可为低渗透裂缝性油藏开发调整提供技术支持。At present,for the low permeability fractured reservoir has not formed a perfect identification method of channeling channels,the application of the evaluation index system does not conform to the actual field,the identification method has strong limitations,there are some problems such as big error in the result of recognition at small level.In order to solve these problems,the evaluation system is constructed by deepening the characteristics,mechanism and performance of interporosity flow in low permeability fractured reservoirs,and introducing the corresponding relationship of sand body and permeability of single well and small layer,the model of channeling channel identification is established by using the method of Modulus and objective mathematical analysis and subjective and objective combination weighting.The results show that the evaluation system and the recognition result are more in line with the actual situation of the mine because of the analysis of the pressure⁃sensitive effect,the effect of starting pressure gradient and the introduction of the corresponding relation of sand body for the first time,one channeling channel has not been identified,and the identified result is basically consistent with the field practice,which proves the accuracy of the established method and can provide technical support for the development and adjustment of low permeability fractured reservoirs.

关 键 词：低渗透油藏 裂缝性 精细识别 窜流通道 主客观组合赋权法 

分 类 号：TE357[石油与天然气工程—油气田开发工程]