石油学报 ›› 2013, Vol. 34 ›› Issue (2): 328-333.DOI: 10.7623/syxb201302015

• 油田开发 • 上一篇    下一篇

多分量地震全波形弹性反演预测砂岩油藏剩余油分布

赵邦六 1  石玉梅 2  姚逢昌 2  牛彦良 3  姜 岩 3  陈志德 3  王桂水 3  马晓宇 2   

  1. 1.中国石油天然气股份有限公司勘探与生产分公司 北京 100007;2.中国石油勘探开发研究院 北京 100083; 3.大庆油田有限责任公司勘探开发研究院 黑龙江大庆 163712
  • 收稿日期:2012-07-15 修回日期:2012-10-15 出版日期:2013-03-25 发布日期:2013-01-31
  • 通讯作者: 石玉梅,女,1966年4月生,1989年毕业于成都地质学院,现为中国石油勘探开发研究院高级工程师,主要从事波动方程正反演、时移地震、多分量地震等理论和方法研究。
  • 作者简介:赵邦六,男,1963年10月生,1985年毕业于长春地质学院应用地球物理专业,现为中国石油天然气股份有限公司勘探与生产分公司总工程师、教授级高级工程师,主要从事油气勘探工作。Email:blzhao@petrochina.com.cn
  • 基金资助:

    国家基础研究发展计划(973)项目(2007CB209500)和中国石油天然气集团公司基础研究项目(2008A-1803)资助。

     

Prediction of the remaining oil distribution using multi-component seismic full waveform elastic inversion

ZHAO Bangliu 1  SHI Yumei 2  YAO Fengchang 2 NIU Yanliang 3  JIANG Yan 3  CHEN Zhide 3  WANG Guishui 3  MA Xiaoyu 2   

  • Received:2012-07-15 Revised:2012-10-15 Online:2013-03-25 Published:2013-01-31

摘要:

中国东部油田经过几十年的开采,主力油层先后进入高含水后期,但仍有相当一部分原油留存在地下。笔者依据中国东部油田原油及地层水的物性特征,分析并研究了流体黏滞性对饱和岩石剪切模量的影响以及黏滞流体剪切模量的变化规律,提出了基于Krief模型和广义Gassmann方程的剪切模量分解及油、水识别方法,并在此基础上进行油水分布预测。根据地震波场的矢量特性和东部油区陆相沉积地层特征,将全波形弹性波动方程反演方法应用于叠前多分量数据处理,获取深度域地层密度、拉梅常数和剪切模量。在大庆油田某油区2D3C地震数据的应用结果表明,利用多分量地震数据全波形弹性反演和流体剪切模量可以比较好地识别油和水,预测剩余油分布。

关键词: 多分量地震, 全波形弹性反演, 黏滞流体, 剪切模量, 剩余油

Abstract:

Although main reservoirs in old oilfields of eastern China have high water cut after decades of production, there is a considerable portion of remaining crude oils being left in the reservoirs. To identify the remaining oil distribution in these reservoirs is one of the keys problems for optimizing development programs and enhancing oil recovery. Based on previous studies on physical properties of crude oils and formation water from oilfields in eastern China,the influence of viscosity fluid on shear moduli of saturated rocks and their variation laws were discussed in detail. A method based on the Krief model and generalized Gassmann equation was proposed to extract the fluid shear modulus from shear moduli of saturated rocks (also known as the effective shear modulus) and then to identify oils and water. The effective modulus was obtained from multi-component seismic data by using full waveform inversion based on the elastic wave equation that naturally takes the complex behavior of propagating waves into account and can be used to make accurate estimates of formation elastic parameters. The method was applied to field data from the Daqing oilfield in eastern China. The verification drilling confirmed that the distribution of remaining oils can be predicted effectively on condition that the full waveform elastic inversion of multi-component seismic data is integrated with the fluid shear modulus when distinguishing crude oils from formation water.

Key words: multi-component seism, full waveform elastic inversion, viscous fluid, shear modulus, remaining oil