Exploration Technology of Lithologic Reservoir in Putaogou Zone in Taibei Sag in Turpan-Hami Basin and Its Effect Analysis

The Taibei sag is changed by the tilting action of late structural movement, so the structure of lithologic reservoir is formed. The prediction of lithologic traps gets very difficult due to the vertical distribution of thin interbeded layers of sandstone and mudstone which are the major target strata in middle Jurassic formation of Putaogou zone, the sharp horizontal phase change, and the small difference of wave impedance characteristics between sandstone and mudstone. This paper makes an effective prediction and evaluation of the growth conditions of lithologic traps and reservoirs in the process of exploration, based on the technologies including sequence stratigraphy, sedimentary microfacies study, lithologic logging curve rebuilding inversion, seismic attribute analysis, the absorption analysis of seismic wavelet. Through the research of the exploration technology for years, rich hydrocarbon accumulation zones of structure and lithologic reservoirs in Putaogou zone are found.