四川盆地川东北区二叠系—三叠系天然气勘探成果与前景展望

doi:10.11743/ogg20060604

Abstract

Abstract:

The shifting of exploration target from structural traps to structural-lithologic traps(represented by dolomite reservoirs reef flat facies in Changxing-Feixianguan Formation of)led to the discovery of Puguang gas field-China's largest marine gas field so far.Based on 40 years of exploration achievements,the reef flat sedimentary model,'ternary reservoir controlling mechanism'concerning the deep carbonate reservoirs,and the 'compound reservoir controlling'model,are established by integrating the geological with seismic data.Breakthroughs are also made in the exploration of oolitic beach limestone in the third and fourth members of Feixianguan Formation and dolomite in the second member of Jialinjiang Formation in the periphery structures.Meanwhile,a theoretical system of gas pooling in deep marine carbonates is constructed,and a series of technologies aiming at integrated reservoir prediction are developed.New exploration achievements reveal that there are several potential exploration targets in the area and that Sichuan basin is an important area for future gas exploration.

Key words: Permian, Triassic, dolomite of reef flat facies, gas reservoiring, northeastern Sichuan, Sichuan basin

CLC Number:

TE112.2

Ma Yongsheng, Cai Xunyu. Exploration achievements and prospects of the Permian Triassic natural gas in northeastern Sichuan basin[J]. Oil & Gas Geology, 2006, 27(6): 741-750.

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Exploration achievements and prospects of the Permian Triassic natural gas in northeastern Sichuan basin

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