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Application of Walkaway-VSP Technology in Volcanic RocksNormal access

Authors: C. Wang, Q. Zhang, Z. Cai, Y. Wang and X. Zhang
Event name: Fourth EAGE Borehole Geophysics Workshop
Session: Poster Session
Publication date: 19 November 2017
DOI: 10.3997/2214-4609.201702485
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 9.9Mb )
Price: € 20

Summary:
Volcanic rock, as a kind of special reservoir, has gradually become an important target for oil and gas exploration. Because of the complex geological conditions in the volcanic rock exploratory area, the poor layering of rock mass, irregular development of rock mass, and quick changes of thickness, the conventional seismic methods can not to satisfy the requirements for fine exploration and development for volcanic rock, due to the low data resolution and the uncertain velocity information. This paper gives an application of Walkaway-VSP data processing and interpretation in Tuha Oilfield Malang Sag Santanghu basin, with high resolution, high fidelity of Walkaway-VSP longitudinal wave imaging, the volcanic rock of M68 well area is described exactly, based on the imaging, vertically the lithologic interface of volcanic rock reservoir and source rock reservoir is carefully identified, horizontally the shape and distribution range of volcanic rock are fine described,which achieves very good application effect.


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