基于數(shù)值模擬的雙感應(yīng)測井裂縫參數(shù)定量評價方法
[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.
【作者單位】: 中國石化股份有限公司石油勘探開發(fā)研究院;
【基金】:國家專項“中西部地區(qū)碎屑巖領(lǐng)域勘探關(guān)鍵技術(shù)”(2016ZX05002-005) 中石化科技部青年創(chuàng)新基金“致密砂巖裂縫參數(shù)測井定量評價模型研究”(P14136) 國家自然科學(xué)青年基金“頁巖氣儲層孔隙孔徑分布表征及滲透率評價方法研究”(41604124)聯(lián)合資助
【分類號】:P631.81
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