多分量数据全波形反演在气藏检测中的关键问题——以苏里格气田为例

doi:10.7623/syxb201903006

石油学报 ›› 2019, Vol. 40 ›› Issue (3): 322-331.DOI: 10.7623/syxb201903006

多分量数据全波形反演在气藏检测中的关键问题——以苏里格气田为例

赵邦六¹, 撒利明², 石玉梅³, 姚逢昌³, 谢桂生⁴, 孙虎生³

1. 中国石油天然气股份有限公司北京 100007;
2. 中国石油天然气集团有限公司北京 100007;
3. 中国石油勘探开发研究院北京 100083;
4. 恒泰艾普(北京)能源科技研究院有限公司北京 100094

收稿日期:2018-07-13 修回日期:2019-01-18 出版日期:2019-03-25 发布日期:2019-03-29
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。Email:symei@petrochina.com.cn
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,现为中国石油勘探与生产分公司总工程师、教授级高级工程师,长期从事油气勘探工作。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

Key issues of multi-component seismic full waveform inversion in the detection of gas reservoirs: a case study of Sulige gas field

Zhao Bangliu¹, Sa Liming², Shi Yumei³, Yao Fengchang³, Xie Guisheng⁴, Sun Husheng³

1. PetroChina Company Limited, Beijing 100007, China;
2. China National Petroleum Corporation, Beijing 100007, China;
3. PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China;
4. LandOcean Energy Service Co. Ltd., Beijing 100094, China

Received:2018-07-13 Revised:2019-01-18 Online:2019-03-25 Published:2019-03-29

摘要/Abstract

摘要：

苏里格气田是中国典型的致密砂岩气藏，构造简单、平缓，横向非均质性强，有效储层与围岩声学特征差别小，地震响应不明显，常规地震监测方法预测难度大，但气田含气砂岩泊松比低，是地震气藏检测的有效参数。利用弹性全波形反演精度高和能处理复杂非均质介质的优势，反演地层拉梅常数、剪切模量和密度，并计算泊松比，从而进行气藏预测。重点阐述了苏里格气田多分量数据全波形反演初始模型建模、先验模型建模和地震数据预处理3个关键问题的处理方法。二维三分量数据反演和"甜点"预测结果表明：①对于具有强非均质性的苏里格气田，利用全波形反演获得精度较高的地层弹性参数能显著提高气藏预测的准确度；②苏里格地区构造简单、平缓，利用常规叠加速度并结合构造解释可以建立比较好的初始模型，从而有效地解决了周波跳跃和局部极小的难题；③先验知识的约束和地震数据的预处理是全波形反演成功应用于苏里格气田气藏检测的关键。

关键词: 弹性全波形反演, 气藏检测, 初始模型, 先验模型, 预处理

Abstract:

Sulige gas field is the typical tight sand gas reservoirs in China, characterized with simple and gentle structure and strongly lateral heterogeneity; due to the subtle difference of acoustic characteristics between the reservoir and surrounding rocks, seismic response is unobvious. This leads to a big difficulty in predicting the conventional seismic monitoring technique. The Poisson's ratio of gas-bearing sand in gas field is small, and can be used as an effective parameter to detect gas reservoirs. Gas reservoir prediction is achieved by taking the advantages of high-precision elastic full waveform inversion (FWI) and the ability to process complex heterogeneous media, by inversion of the lamé constant, shear modulus and density of formations, as well as calculation of the Poisson's ratio. This paper focuses on the three key problems of multi-component full waveform inversion in Sulige gas field, i.e., initial modeling, prior modeling and seismic data preprocessing. The results of 2D3C data inversion and sweet points prediction show that: (1) The high-precision stratigraphic elastic parameters obtained by FWI can significantly improve the accuracy of gas reservoir prediction in the Sulige gas field with strong heterogeneity; (2) The Sulige area has simple and gentle structure, and the conventional stack velocity is used in combination with structural interpretation to create a good initial model, so as to effectively solve such problems as cycle skip and local minimum; (3) the prior knowledge constraint and the preprocessing of seismic data are also key factors for successfully applying FWI in the gas reservoir detection of Sulige gas field.

Key words: elastic full waveform inversion, gas reservoir detection, initial model, prior model, preprocessing

中图分类号:

P631.4

赵邦六, 撒利明, 石玉梅, 姚逢昌, 谢桂生, 孙虎生. 多分量数据全波形反演在气藏检测中的关键问题——以苏里格气田为例[J]. 石油学报, 2019, 40(3): 322-331.

Zhao Bangliu, Sa Liming, Shi Yumei, Yao Fengchang, Xie Guisheng, Sun Husheng. Key issues of multi-component seismic full waveform inversion in the detection of gas reservoirs: a case study of Sulige gas field[J]. Acta Petrolei Sinica, 2019, 40(3): 322-331.

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多分量数据全波形反演在气藏检测中的关键问题——以苏里格气田为例

Key issues of multi-component seismic full waveform inversion in the detection of gas reservoirs: a case study of Sulige gas field

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