岩性油气藏是目前吐哈盆地胜北洼陷油气勘探的重要接替领域, 也是近期增储上产最为现实的油气藏类型。胜北洼陷岩性油气藏勘探刚刚开始, 有必要结合构造油气藏勘探成果, 系统分析洼陷基本成藏条件, 明确近期岩性油气藏有利勘探区带。胜北洼陷侏罗系发育中、下侏罗统水西沟群和中侏罗统七克台组湖相泥岩等烃源岩系, 油源条件好, 油气资源丰富; 侏罗系及其以上发育7套储盖组合; 油气藏类型主要为中侏罗统的构造、构造2岩性油气藏、上侏罗统和白垩系的浅层次生构造2岩性油气藏; 成藏期为燕山期和喜山期。在目前构造油气藏勘探程度相对较高的形势下, 围绕古构造背景开展岩性圈闭识别、描述、优选与评价, 寻找构造2岩性油气藏是近期的主要勘探方向, 其中葡北东斜坡、葡萄沟北坡、洼陷中央胜北构造及其南翼等地区是近期岩性油气藏勘探有利区带。

The lithologic trap is one of main relay exploration domains of Shengbei Depression in Turpanharmy Basin and apractical domain for reserve increasing too. At the beginning of lithologic traps exploration in Shengbei Depression,it is necessary to systematically analyse the basic petroleum accumulation conditions of the Depression to specify the potential exploration zones of lithologic traps clearly.There are hydrocarbon source rocks in Shuixigou Group of Lower-Middle Jurassic and Qiketai mudstone formation of lacustrine facies,so the hydrocarbon source condition is good and hydrocarbon resources are rich in this depression;there are 7 reservoir-seal assemblages in Jurassic and above sequences.Oil reservoirs mainly are structure,lithologic-structure type of middle Jurassic,shallow secondary reservoir of upper Jurassic and Cretaceous. Petroleum accumulation is mainly in Yanshan period and Himalaya period. With the total situation of the present exploration of structural hydrocarbon reservoirs, the main exploration direction is to take lithologic trap identification,preference, description and evaluation to find structural hydrocarbon reservoirs surrounding the palaeostructure background.The east slope of Pubei,the north slope of Putaogou and the Shengbei structure zone situated at the cross position of north and south sedimentary source in the middle of the Depression,are favorable exploration zones of lithologic traps at present time.