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中南大学学报(自然科学版)

Journal of Central South University

第47卷    第1期    总第257期    2016年1月

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文章编号:1672-7207(2016)01-0159-07
利用地震信息定量预测烃源岩TOC质量分数
陈宇航1, 2,姚根顺2,刘震3,吕福亮2,唐鹏程2,陈亮4,赵千慧3

(1. 中国石油勘探开发研究院,北京,100083;
2. 中国石油杭州地质研究院,浙江杭州,310023;
3. 中国石油大学(北京) 地球科学学院,北京,102249;
4. 中海油研究总院,北京,100027
)

摘 要: 基于烃源岩评价是低勘探程度区(深水、深层)油气勘探工作中的重要环节,而烃源岩的有机碳(TOC)质量分数往往决定该地区的资源潜力和油气储量规模,将地震资料和少量钻井资料结合,通过地震速度反演对烃源岩的TOC质量分数进行预测:对FAUST公式进行变换,建立用泥岩速度预测电阻率的模型,并结合ΔlgR法,建立少井约束地震预测TOC质量分数模型。利用该模型对南海北部深水区C凹陷Y1段烃源岩TOC质量分数进行预测。研究结果表明:凹陷边缘三角洲相与海岸平原相TOC质量分数较高,凹陷中心滨浅海相TOC质量分数较低;TOC质量分数分布与沉积相匹配良好,显示了该预测方法在低勘探程度地区的可行性。

 

关键词: 低勘探地区;有机碳;ΔlgR法;有色反演

Total organic carbon quantitative prediction usingseismic information
CEHN Yuhang1, 2, YAO Genshun2, LIU Zhen3, LüFuliang2, TANG Pengcheng2, CHEN Liang4, ZHAO Qianhui3

1. Research Institute of Petroleum Exploration and Development, CNPC, Beijing 100083, China;
2. PetroChina Hangzhou Institute of Geology, Hangzhou 310023, China;
3. College of Geoscience, China University of Petroleum, Beijing 102249, China;
4. China National Offshore Oil Corporation Research Institute, Beijing 100027, China

Abstract:Considering that source rock evaluation is an important step of the whole process of oil and gas exploration in low exploration areas (deep water, deep layer), where the mass fraction of total organic carbon (TOC) of source rocks determines the resource potential and oil and gas reserves, based on the combination of seismic data and a few of drilling data, the mass fraction of TOC could be quantitatively predicted by seismic velocity inversion. The mudstone resistivity prediction model was established by velocity based on the FAUST equation-transformation. Furthermore, less well constrained seismic prediction model of mass fraction of TOC was built in combination with ΔlgR method. The mass fraction of TOC of C Sag of Y1 Member in the north of South China Sea was predicted by using this model. The results show that the mass fraction of TOC of the delta and coastal plain facies on the edge of the Sag is higher than that of shore-neritic facies in the sag center. The results are consistent with those of sedimentary facies, which verifies the reliability of this method.

 

Key words: low exploration areas; total organic carbon; ΔlgR method; color inversion

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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