柴北缘地区油气成藏模式与成藏规律

从柴北缘中新生界沉积特征和构造改造特征出发,分析了中、下侏罗统不同含油气系统的油气成藏模式,在总结已发现成藏模式的基础上,提出了不同区域的有利成藏组合和发育层位。在对柴北缘成藏模式认识的基础上,从油气生成、运聚、成藏出发,总结了其油气成藏规律,指出了中、下侏罗统生烃凹陷的构造演化特征,认为残余有效生烃凹陷规模和所处的构造位置控制了构造带的油气富集,油气相态的横向分布受埋藏深度的控制明显,纵向分布受油气生烃期次控制。

RESERVOIRING PATTERNS AND ACCUMULATION REGULARITY IN NORTHERN OF QAIDAM BASIN

Based on the analysis of Meso-Cenozoic sedimentation and structural reconstruction in northern of Qaidam basin, general review the reservoiring patterns of variant petroleum systems of middle-lower Jurassic in northern of Qaidam basin. With the generalization of reservoiring patterns of existing petroleum reservoirs and put forth the favorable reservoir combinations and bed sets of each region. With the deeply understand of reservoiring patterns in northern of Qaidam basin, from the points of oil-gas generation, migration, accumulation and reservoiring to analysis the accumulation regularity in northern of Qaidam basin. Combining the structural evolution of petroleum generation depressions of middle-lower Jurassic, point out that the scale of the effective petroleum generation depression and the structural position where the depression is controlled the accumulation of petroleum. The phase state of petroleum is controlled by buried depth in horizon and oil-gas generation period in vertial.