基于非凸包的灌注區(qū)包絡(luò)自動擬合方法
2020年信息技術(shù)與網(wǎng)絡(luò)安全第11期
謝家靖1,,滕奇志1,,何小海1,,龔 劍2
1.四川大學(xué) 電子信息學(xué)院 圖像信息研究所,,四川 成都610065,; 2.成都西圖科技有限公司,,四川 成都610065
摘要: 在微觀驅(qū)替實驗中,,往往利用玻璃刻蝕模型來觀察油水在巖心孔隙中的運動過程,。對實驗中采集到的微觀驅(qū)替序列圖進(jìn)行分析研究,,能夠?qū)︱?qū)替效果進(jìn)行定量計算。針對微觀驅(qū)替序列圖中灌注區(qū)數(shù)量不固定,、形態(tài)特征不規(guī)則,、圖像數(shù)量多等問題,提出了一種基于非凸包的灌注區(qū)包絡(luò)自動擬合方法。即先對灌注區(qū)點集進(jìn)行邊緣提取,,再對灌注區(qū)進(jìn)行聚類分析,,最后采用非凸包算法對每個灌注區(qū)提取包絡(luò)。結(jié)果顯示采用該方法得到的波及系數(shù)比傳統(tǒng)凸包算法具有更高的精確性,,并可實現(xiàn)包絡(luò)擬合的自動化,,具有比較高的應(yīng)用價值。
中圖分類號: TP312
文獻(xiàn)標(biāo)識碼: A
DOI: 10.19358/j.issn.2096-5133.2020.11.014
引用格式: 謝家靖,,滕奇志,,何小海,等. 基于非凸包的灌注區(qū)包絡(luò)自動擬合方法[J].信息技術(shù)與網(wǎng)絡(luò)安全,,2020,,39(11):84-89.
文獻(xiàn)標(biāo)識碼: A
DOI: 10.19358/j.issn.2096-5133.2020.11.014
引用格式: 謝家靖,,滕奇志,,何小海,等. 基于非凸包的灌注區(qū)包絡(luò)自動擬合方法[J].信息技術(shù)與網(wǎng)絡(luò)安全,,2020,,39(11):84-89.
Automatic envelope fitting method of perfusion areas based on non-convex hull
Xie Jiajing1,Teng Qizhi1,,He Xiaohai1,,Gong Jian2
1.Institute of Image Information,School of Electronics and Information Engineering,, Sichuan University,,Chengdu 610065,China,; 2.Chengdu Xitu Technology Company Limited,,Chengdu 610065,China
Abstract: During microscopic displacement experiments, the glass etching model is often used to observe the movement of oil and water in the core pores. The quantitative displacement effect is able to obtained by analyzing the microscopic displacement sequential images collected in the experiment. Regarding the problems of the volatile number and shape of perfusion areas, large quantity of sequential images collected in the experiment, this paper proposes an automatic envelope fitting method of perfusion areas which is based on non-convex hull. After boundary extraction, cluster the point set of perfusion areas. Then the envelope of each perfusion area is calculated by non-convex hull algorithm. The result shows that the conformance coefficient obtained by this method has higher accuracy than the result of traditional convex hull algorithm. In addition, this method achieves the automation of envelope fitting which has high application value.
Key words : envelope of perfusion area,;non-convex hull,;conformance efficiency
0 引言
微觀驅(qū)替實驗[1-2]是指利用真實巖心或者微觀仿真模型進(jìn)行驅(qū)替實驗,通過顯微鏡觀察微觀狀態(tài)下油水在孔隙中的滲流情況,,從而分析水驅(qū)油,、聚合物驅(qū)油等驅(qū)替方式的驅(qū)替效果以及剩余油的分布情況。由于良好的可視性和可重復(fù)利用性,,石油地質(zhì)工作者往往采用玻璃刻蝕模型來代替真實巖心進(jìn)行仿真實驗,,其實驗過程如圖1所示[3-4]。通過玻璃刻蝕模型可以在驅(qū)替過程中觀察到油,、水,、驅(qū)替劑在孔隙中的運移過程,再通過連接攝像裝置,,采集模型的動態(tài)圖像,,利用圖像處理技術(shù)對采集到的圖像進(jìn)行定量分析,從而研究不同驅(qū)替劑的驅(qū)替效率和機理[5],。
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作者信息:
謝家靖1,,滕奇志1,,何小海1,龔 劍2
(1.四川大學(xué) 電子信息學(xué)院 圖像信息研究所,,四川 成都610065,;
2.成都西圖科技有限公司,四川 成都610065)
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