Journal of Jilin University(Earth Science Edition) ›› 2016, Vol. 46 ›› Issue (5): 1312-1320.doi: 10.13278/j.cnki.jjuese.201605104

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Granite Buried Hill Reservoir Characterization and Modeling:Taking Offshore a Oilfield in Bohai Bay as an Example

Zhang Yuqing, Wang Hui, Fan Ting'en, Song Laiming, Nie Yan, Liang Xu, Chen Fei   

  1. CNOOC Research Institute, Beijing 100027
  • Received:2015-12-12 Online:2016-09-26 Published:2016-09-26
  • Supported by:

    Supported by 12th Five-Year National Science and Technology Major Projects(2011ZX05024-001)

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Abstract:

Granite buried hill reservoir is rare in the world. No systematic research method on fracture characterization of granite buried hill reservoir has been formed so far. Meanwhile, as the reservoir was multiply reconstructed by tectonic, weathering and erosion processes, pores, fractures and caves developed inside together. So it’s difficult to characterize the reservoir as fractures developed with strong heterogeneity. For this reason, the article proposed a set of methods for fracture characterization and modeling of granite buried hill reservoir, taking offshore oilfield A in Bohai Bay as an example. Firstly starting from fracture genetic analysis, geomorphologic analytic method is introduced to determine main controlling factors of fracture distribution with evolutionary characteristic analysis. On the basis above, fracture development trend models of different genetic types are established. Secondly, with advanced DFN method, the DFN model is built with statistical fracture parameters of well point as prior information and fracture trend models as constraint condition, then fracture attribute models have been abtained with upscaling method. Finally fracture attribute models are verified and optimized with static and dynamic data. With the two methods of verification for quality control of fracture model, the ultimate fracture model is accordant with the geological understanding.

Key words: granite buried hill, reservoir modeling, geomorphology, fracture model, Bohai Bay

CLC Number: 

  • TE122.1

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