Received date: 2012-09-14
Revised date: 2012-12-15
Online published: 2013-08-10
The Xujiahe Formation in Baimiao area in the middle part of Sichuan Basin has frequent oil and gas shows in drilling and it indicates tremendous exploration potential.It is important to develop the study of oil-gas detection in the Second Member and the Forth Member of Xujiahe Formation.The detection of distribution of favorable oil and gas range in the target strata is based on the fluvial detection principle and flow in two-phase medium,i.e.,based on the phenomenon of “low frequency resonance and high frequency attenuation” of seismic response of underground two-phase medium.The wiggles of seismic data are intact and complete.There are no phenomena of cut value and cutoff frequency,and the quality of seismic data is good.The seismic response of reservoirs of the Second Member and the Forth Member of Xujiahe Formation represents weak amplitude,good continuity and low frequency.According to the fluvial detection flow in two-phase medium,the oil-gas detection has been realized on 29 two-dimentional seismic profiles in the total thickness of 890km of the Second Member and the Forth Member of Xujiahe Formation in the study area.Implementing the oil-gas detecting result of two-target strata of the two members on every seismic profile,final plane figures are separately completed,so that the favorable exploration area is determined,which is of actual significance in expanding the exploration realm and in searching for new exploration areas.
Key words： Two phase medium; Fluid detection; Baimiao area; Xujiahe Formation
ZHANG Yan-fang，WANG Quan-feng . Oil-gas Detecting Techniques with Seismic in Two Phase Medium[J]. Natural Gas Geoscience, 2013 , 24(4) : 803 -807 . DOI: 10.11764/j.issn.1672-1926.2013.04.803
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