The Gas Accumulation Conditions of Dongping-Niudong Slope Areain Front of Aerjin Mountain of Qaidam Basin
Received date: 2013-04-09
Revised date: 2013-07-22
Online published: 2013-12-10
The level of exploration and geological understanding of Dongping-Niudong slope area,which is in front of Aerjin Mountain of Qaidam Basin,was poor in early period.Recently,under the guidance of the new exploration theory of looking for large lithologic reservoirs,which are outside the sources,in slope areas,we strengthened comprehensive analysis and evaluation of the lithologic gas accumulation conditions in the slope areas.The result showed that the accumulation conditions in Dongping-Niudong slope were favorable,such as large distribution area of source rocks,multiple sets of target layers department,the favorable reservoir-cap combination,the continuing development of palaeohigh(ancient slopes),regional unconformity,divert fractures for oil and gas and so on.Now,we have achieved great exploration breakthrough in the weathering crust and Lulehe Formation(E1+2) of Well Dongping 1,which located in low faulted uplift part,industrial gas in lower Ganchaigou Formation(E3) of the Well Dongping 3,which located in high fault terrace part,high-yield oil and gas flow in the Jurassic of well Niu 1,which located in Niudong nose uplift.These findings show that the natural gas accumulation condition in the whole Dongping-Niudong slope is advantageous and this area has broad prospects of exploration.
CAO Zheng-lin，SUN Xiu-jian，WANG Li-qun，YAN Cun-feng，ZHAO Jian，MA Feng . The Gas Accumulation Conditions of Dongping-Niudong Slope Areain Front of Aerjin Mountain of Qaidam Basin[J]. Natural Gas Geoscience, 2013 , 24(6) : 1125 -1131 . DOI: 10.11764/j.issn.1672-1926.2013.06.1125
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