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油气层神经网络识别方法研究
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摘要
油气层的准确识别既是提高勘探效果的关键环节之一,又可为开发的部署与规划提供重要的基础数据。特别是在油田注水开发中后期,油井产液中的水含量越来越高,因此极需准确了解地下油气层中的情况。国内测井公司人工解释油气层的符合率虽然很高,但主要是依赖测井解释工程师丰富的实际经验,这对油气层解释工作的推广极为不利。而现有的解释软件又未加入人工经验,计算机解释符合率与人工解释相差很大。
     本课题拟在现有的油气层识别研究与评价技术基础上,通过对不同储层下测井响应的分析,提取测井曲线的特征参数,并利用神经网络方法识别储层,相信能大幅度提高计算机对储层测井解释的符合率。开展本课题的研究对于油田油藏的勘探与开发,对于油田稳油控水及高产稳产都具有重要的指导意义。
     具体研究内容及预期达到的成果:
     (1)对油田开发区域的测井资料进行常规解释,划分出标准储层。
     (2)在充分考虑储层影响因素的情况下,统计出储层的测井曲线响应特征,建立适用的标准储层识别模式。
     (3)准确提取储层测井曲线的特征参数,使各种储层的影响因素充分反映在特征参数上。
     (4)选用神经网络方法,结合所提取的特征参数,编写储层神经网络识别程序,并进行实际测井资料处理,以提高储层计算机识别的符合率。
Recognizing the oil-gas-water bed exactly is both one of the critical link of improving the effect of exploration and offering important basic data for the disposition and planning of development. Especially in the medium-late period of water-injection development oil field, the content of water of production in oil well is more and more high, so knowing exactly the situation of the undergrad oil-gas-water bed is very necessary. The civil well log company get the suit rate of artificial interpretation for oil-gas bed is though very high, it mainly depended on the rich experience of the log engineers, and it is very disadvantageous for the popularization of the oil-gas-water bed interpretation. And the present software for interpretation is not including the artificial experience; the suit rate of computer interpretation and the artificial interpretation have a great difference.
    This title based on the present recognition study and evaluation technique, through the analysis for the logging response in different reservoir, taking out the characteristic parameter of well log cove, and use neural network to recognize reservoir, it is believed that the suit rate of reservoir log interpretation with computer will get a good improvement. The research of this title, for the exploration and development of oil field and oil pool, for stabilizing oil and controlling water, and for the high productivity and stable production of oil field, will have a very important guiding meaning.
    Concrete content and expected result:
    1. Give the normal interpretation for log data of the oil field developing area, mark the standard reservoir.
    2. Considering plenty the effect factor of reservoir, make a statistics of the log curve response character of reservoir; establish a suitable recognition pattern of standard reservoir.
    3. Take out the characteristic parameter of the log curve for reservoir; make sure that the effect factors of different reservoir reflect on the characteristic parameter.
    4. Choose the neural network method, join with the characteristic parameter which taken out from the log curve, write a recognition programmed of reservoir neural network, and make a treatment of practical log data, to raise the suit rate of computer recognition for reservoir.
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