基于数值模拟的双感应测井裂缝参数定量评价方法
发布时间：2018-11-22 11:19
【摘要】：为厘清裂缝性地层双感应测井响应特征,建立裂缝参数评价方法,本文建立了含基岩、裂缝、井眼、双感应测井仪器的裂缝性地层双感应测井正演模型,以Gianzero几何因子理论为基础,结合阿特拉斯公司1503双感应测井仪器开展了高阻背景下低阻裂缝测井响应数值模拟.首先计算了1503双感应测井仪器几何因子,然后根据该几何因子求解不同裂缝开度、裂缝充填流体电导率、基岩电导率条件下双感应测井响应特征,分析了裂缝开度、裂缝充填流体电导率、基岩电导率对双感应测井响应的影响,归纳了裂缝性地层双感应测井响应规律.采用深感应视电阻率及深、中感应视电阻率比值作为横纵坐标,结合裂缝充填流体电阻率绘制了一套双感应裂缝开度评价图版.通过对图版数据进行拟合,建立了裂缝开度评价模型.在采用岩心、成像资料对评价模型刻度以减小几何因子理论计算非均质裂缝产生的误差后该模型可用于求取裂缝参数.最后将该方法应用于镇泾油田致密砂岩裂缝性储层进行裂缝参数定量评价,评价结果与成像测井评价结果吻合较好.
[Abstract]:In order to clarify the response characteristics of dual induction logging in fractured formations and to establish a method for evaluating fracture parameters, a forward model of dual induction logging for fractured formations with bedrock, fracture, borehole and dual induction logging tools is established in this paper. Based on Gianzero geometric factor theory and 1503 dual induction logging tools of Atlas Company, the logging responses of low resistivity fractures under high resistivity background were simulated. The geometric factors of 1503 double induction logging tools are calculated firstly, and then the response characteristics of dual induction logging under the condition of different fracture opening, fracture filling fluid conductivity and bedrock conductivity are calculated, and the fracture opening is analyzed. The effects of fracture filling fluid conductivity and bedrock conductivity on dual induction logging response are summarized. A set of double inductive fracture opening evaluation charts are drawn by using the ratio of deep and medium apparent resistivity as the vertical coordinate and combining with the resistivity of fracture filling fluid. By fitting the plate data, a crack opening evaluation model is established. The model can be used to calculate the fracture parameters after the core and imaging data are calibrated to reduce the error caused by geometric factor theory. Finally, the method is applied to the quantitative evaluation of fracture parameters in tight sandstone fractured reservoirs in Zhenjing Oilfield, and the evaluation results are in good agreement with those of imaging logging.
【作者单位】： 中国石化股份有限公司石油勘探开发研究院;
【基金】：国家专项“中西部地区碎屑岩领域勘探关键技术”(2016ZX05002-005) 中石化科技部青年创新基金“致密砂岩裂缝参数测井定量评价模型研究”(P14136) 国家自然科学青年基金“页岩气储层孔隙孔径分布表征及渗透率评价方法研究”(41604124)联合资助
【分类号】：P631.81
本文编号：2349201
[Abstract]:In order to clarify the response characteristics of dual induction logging in fractured formations and to establish a method for evaluating fracture parameters, a forward model of dual induction logging for fractured formations with bedrock, fracture, borehole and dual induction logging tools is established in this paper. Based on Gianzero geometric factor theory and 1503 dual induction logging tools of Atlas Company, the logging responses of low resistivity fractures under high resistivity background were simulated. The geometric factors of 1503 double induction logging tools are calculated firstly, and then the response characteristics of dual induction logging under the condition of different fracture opening, fracture filling fluid conductivity and bedrock conductivity are calculated, and the fracture opening is analyzed. The effects of fracture filling fluid conductivity and bedrock conductivity on dual induction logging response are summarized. A set of double inductive fracture opening evaluation charts are drawn by using the ratio of deep and medium apparent resistivity as the vertical coordinate and combining with the resistivity of fracture filling fluid. By fitting the plate data, a crack opening evaluation model is established. The model can be used to calculate the fracture parameters after the core and imaging data are calibrated to reduce the error caused by geometric factor theory. Finally, the method is applied to the quantitative evaluation of fracture parameters in tight sandstone fractured reservoirs in Zhenjing Oilfield, and the evaluation results are in good agreement with those of imaging logging.
【作者单位】： 中国石化股份有限公司石油勘探开发研究院;
【基金】：国家专项“中西部地区碎屑岩领域勘探关键技术”(2016ZX05002-005) 中石化科技部青年创新基金“致密砂岩裂缝参数测井定量评价模型研究”(P14136) 国家自然科学青年基金“页岩气储层孔隙孔径分布表征及渗透率评价方法研究”(41604124)联合资助
【分类号】：P631.81
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