准噶尔盆地车莫古隆起构造特征与成藏模式

Characteristics and Reservoiring Mode of Chepaizi-Mosuowan Paleo-uplift in Junggar Basin

准噶尔盆地车莫古隆起为南西—北东走向的燕山期古隆起,分布范围大于2×104km2。现今车莫古隆起的深层仍存在低幅度的背斜构造和鼻状构造,浅层构造简单、断裂不发育。其形成演化可划分为5个阶段,即:凸起形成阶段、缓慢发育阶段、强烈发育阶段、隐伏埋藏阶段和改造调整阶段。车莫古隆起提供了形成各种地层、岩性等隐蔽型圈闭的条件和良好的油气运聚背景,有利于盆地腹部大范围、区域性的油气成藏。

Chepaizi-Mosuowan paleo-uplift in Junggar Basin belongs to southwest-eastnorth Yanshan paleo-uplift, its area is more than 20000sq. km. In the deep part of Chepaizi-Mosuowan paleo-uplift at present, low-amplitude anticlines and nose structures also exist; however, theshallow structures are simple, fault is not developed. The evolution of Chepaizi-Mosuowan paleo-uplift can be divided into five stages, i.e. upliftformation stage, slowly growing stage, violently developing stage ,subtle and burial stage as well as reconstructing and adjusting stage. Chepaizi-Mosuowan paleo-uplift have provided with the conditions to form the various subtle traps such as lithologic and stratigraphic traps, and goodsettings for oil/gas migration and accumulation, which are favorable to generate the large-scale and regional oil/gas reservoirs inside the basin.