叠后地震资料气水识别研究与应用
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摘要
近年来,应用AVO、模式识别、多波勘探等方法进行气水识别已经取得了一定成效,但还没有取得理想的进展。AVO方法由于理论上的近似或实际资料难以满足计算条件,其效果难以令人满意;后来采用模式识别方法进行气水识别,虽然有一定效果,但这种方法需要在勘探开发中后期、有相当多的气水井后才能预测,且效果很难把握,受样本影响大,不同的样本群会有不同的结果。如今采用多波勘探试验资料的纵横波信息进行了理论和实践研究,掌握了气水与纵横波的基本关系,在此基础上,研究了叠后地震资料气水识别方法,其基本思路是借助叠后地震剖面中含有的横波信息或纵波转换的横波信息,结合测井资料进行气水识别,取得了较好的勘探效果。
Although some good results have been achieved in recent years there is still no satisfactory progress in gas/water identification by various methods like amplitude versus offset(AVO),pattern recognition,multi-wave exploration,etc.First,the AVO method can not solve the conflict between the similarity on the theory and the impracticability in the calculation.Then,the pattern recognition has to be carried out during the middle-or the late-period of exploration and even under such conditions with quite a number of gas wells with water.In spite of this,the gas/water identification is easily influenced by samples with different results from different samples.At present,through in-depth study on the P and S wave from multi-wave exploration data from theory to practices,we know well the basic relationship between gas-water and P-S wave.Based on this,we keep study on the method of gas/water identification by the poststack seismic data.The basic idea of this method is gas/water can be well identified by combing the logging data with the collected data from the S wave in the poststack seismic profile or the converted S wave from P wave.
Although some good results have been achieved in recent years there is still no satisfactory progress in gas/water identification by various methods like amplitude versus offset(AVO),pattern recognition,multi-wave exploration,etc.First,the AVO method can not solve the conflict between the similarity on the theory and the impracticability in the calculation.Then,the pattern recognition has to be carried out during the middle-or the late-period of exploration and even under such conditions with quite a number of gas wells with water.In spite of this,the gas/water identification is easily influenced by samples with different results from different samples.At present,through in-depth study on the P and S wave from multi-wave exploration data from theory to practices,we know well the basic relationship between gas-water and P-S wave.Based on this,we keep study on the method of gas/water identification by the poststack seismic data.The basic idea of this method is gas/water can be well identified by combing the logging data with the collected data from the S wave in the poststack seismic profile or the converted S wave from P wave.
引文
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[2]董敏煜.地震勘探[M].东营:石油大学出版社,2006.
[3]王永刚.地震资料综合解释方法[M].东营:石油大学出版社,2007.
[4]吴大奎,李亚林,伍志明,等.地震、测井资料联合反演的神经网络算法研究[J].天然气工业,2004,24(3):55-57.
[5]吴大奎,唐必锐,覃发兰,等.地震资料储层预测反演方法应用研究[J].天然气工业,2004,24(10):38-40.
[6]洪有密.测井原理与解释[M].东营:石油大学出版社,2007.
[7]姚姚.地震波场与地震勘探[M].北京:地质出版社,2006.
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