准噶尔盆地腹部隐蔽油气藏及勘探思路

准噶尔盆地腹部油气资源非常丰富,其中相当一部分储集在隐蔽油气藏中。准噶尔盆地腹部隐蔽油气藏具有多沉积体系控制、构造-岩性复合、多层系含油以及具有多期成藏的特点。对隐蔽油气藏的勘探既要采用新的研究思路,又要采用现已比较成熟的研究方法。首先开展高分辨率层序划分对比研究,确定隐蔽圈闭发育的有利层位;其次开展古地貌及沉积环境研究,寻找坡折带和有利相带,确定隐蔽圈闭发育的有利部位;再次开展地震处理,发现和落实隐蔽圈闭,寻找隐蔽油气藏。

Characteristics of subtle oil/gas reservoirs and exploration strategy in central Junggar basin

Central Junggar basin is rich in petroleum resources,much of which are accumulated in subtle oil/gas reservoirs. The subtle oil/gas reservoirs are characterized by control of multiple sedimentary systems, structural lithologic combination, multiple oil bearing layers and multi stage reservioring. Both new ideas and relatively mature methods should be used in exploration of subtle oil/gas reservoirs. Firstly, determining favorable horizons for development of subtle traps through high resolution sequence stratigraphic division and correlation; then looking for slope break zones and favorable facies zones through palaeotopographic and sedimentary environment studies; and finally locating subtle traps and searching for subtle reservoirs through seismic processing.