基于數(shù)值模擬的雙感應測井裂縫參數(shù)定量評價方法
發(fā)布時間:2018-11-22 11:19
【摘要】:為厘清裂縫性地層雙感應測井響應特征,建立裂縫參數(shù)評價方法,本文建立了含基巖、裂縫、井眼、雙感應測井儀器的裂縫性地層雙感應測井正演模型,以Gianzero幾何因子理論為基礎,結合阿特拉斯公司1503雙感應測井儀器開展了高阻背景下低阻裂縫測井響應數(shù)值模擬.首先計算了1503雙感應測井儀器幾何因子,然后根據(jù)該幾何因子求解不同裂縫開度、裂縫充填流體電導率、基巖電導率條件下雙感應測井響應特征,分析了裂縫開度、裂縫充填流體電導率、基巖電導率對雙感應測井響應的影響,歸納了裂縫性地層雙感應測井響應規(guī)律.采用深感應視電阻率及深、中感應視電阻率比值作為橫縱坐標,結合裂縫充填流體電阻率繪制了一套雙感應裂縫開度評價圖版.通過對圖版數(shù)據(jù)進行擬合,建立了裂縫開度評價模型.在采用巖心、成像資料對評價模型刻度以減小幾何因子理論計算非均質(zhì)裂縫產(chǎn)生的誤差后該模型可用于求取裂縫參數(shù).最后將該方法應用于鎮(zhèn)涇油田致密砂巖裂縫性儲層進行裂縫參數(shù)定量評價,評價結果與成像測井評價結果吻合較好.
[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)碎屑巖領域勘探關鍵技術”(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
本文編號: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)碎屑巖領域勘探關鍵技術”(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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