摘要
远探测声波成像测井在裂缝等井旁构造评价方面具有广阔的应用前景。声波远探测对井旁反射体进行成像后一般需要从成像图中拾取反射体形态并确定其产状等参数,但成像图中反射体响应信噪比一般较低,给反射体的高效识别带来巨大挑战。为此,在对比分析多种滤波算法效果的基础上,优选了自适应维纳滤波算法对远探测声波成像图进行降噪处理,然后采用数字图像处理方法(灰度化处理、形态学处理、反射体轮廓绘制、最小外接矩形筛选算法)进一步处理图像,实现了目标反射体形态和倾角特征信息的智能拾取。该方法应用于实际远探测声波成像反射体评价中,取得了较好的应用效果,证实了该方法的正确性与可行性。
Remote detection acoustic imaging logging holds substantial potential for assessing near-well structures like fractures.After imaging the reflectors near to wells using acoustic remote detection,it is generally necessary to extract the reflector shape from the imaging map and determine its occurrence and other parameters.However,the signal-to-noise ratio of the reflector response in the imaging map is generally low,which poses a significant challenge to the efficient identification of reflectors.To this end,on the basis of comparing and analyzing the effects of various filtering algorithms,the adaptive Wiener filtering algorithm is preferred for noise reduction of the remote detection acoustic imaging map,and then digital image processing methods(gray-scale processing,morphology processing,reflector contour rendering,minimum external rectangle screening algorithm)are used to further process the image,achieving intelligent pickup of target reflector shape and inclination characteristics.This method has been applied to the evaluation of practical remote detection acoustic imaging reflectors,and achieved good application results,confirming the correctness and feasibility of the method.
作者
蔡明
陈枫
伍东
章骏霄
唐军
谭礼洪
黄扬
张远君
CAI Ming;CHEN Feng;WU Dong;ZHANG Junxiao;TANG Jun;TAN Lihong;HUANG Yang;ZHANG Yuanjun(College of Geophysics and Petroleum Resources,Yangtze University,Wuhan 430100,Hubei;Key Laboratory of Oil and Gas Resources and Exploration Technology of Ministry of Education(Yangtze University),Wuhan 430100,Hubei;Information Center,Engineering Technology R&D Company Limited,CNPC,Beijing 102206;Yangtze University College of Arts and Sciences,Jingzhou 434020,Hubei;Exploration and Development Research Institute of Tarim Oilfield Company,PetroChina,Korla 841000,Xinjiang)
出处
《长江大学学报(自然科学版)》
2025年第1期33-39,共7页
Journal of Yangtze University(Natural Science Edition)
基金
国家自然科学基金项目“复杂裂缝介质多尺度声波测井响应机理实验及智能评价方法研究”(42474177)
“致密储层裂缝有效性的双尺度声波测井评价方法研究”(42104126)
中国石油科技创新基金项目“超深裂缝型各向异性地层声波测井响应机理实验研究”(2022DQ02-0301)
湖北省教育厅科学技术研究项目“鄂西页岩气藏水平井中声波测井响应正演模拟研究”(Q20211309)。
关键词
声波测井
远探测声波成像
裂缝
自适应维纳滤波
反射体拾取
acoustical logging
remote detection acoustic imaging
fracture
adaptive wiener filtering
pickup of the reflector
