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摘要: 临邑洼陷古近系和新近系断裂发育，沉积相和沉积体系频繁变化，为岩性油藏的形成提供了良好条件。古近系岩性油藏主要包括砂岩透镜体油藏、砂体上倾尖灭油藏和砂体被断层切穿的岩性油藏三种类型。砂岩透镜体油藏主要分布于深凹陷带及斜坡上的三角洲前缘相带，砂体上倾尖灭油藏主要分布于斜坡带，砂体被断层切穿的油藏一般位于断裂相对发育的构造带附近。临邑洼陷具备丰富的油源条件、不整合与断层的沟通或侧向遮挡，有效的直接盖层等优越条件。因此，三角洲前缘砂体、滑塌浊积岩砂体、湖相砂体的分布，成为控制岩性油藏形成的主控因素。上述主要因素控制下，在不同构造部位和沉积相带，油藏类型有规律地变化。Abstract: Linyi subsag have many faults in Paleogene and Neogene. Meanwhile, their sedimentary facies and depositional systems change frequently.〖KG*2〗Those provided avail qualification for forming the lithologic oil reservoir. The lithologic oil reservoirs in Paleogene〖KG*2〗in Linyi subsag include three kinds, such as oil charged in lensshaped sand body, lithologic upclined pinchout oil reservoir〖KG*2〗and oil charged in sand body that connected on the flanks of the faults. It was suggested that oil charged in lensshaped sand body will easily take place in deep sag belts and delta front〖KG*2〗in gentle slope belts. It was also suggested〖KG*2〗that lithologic upclined pinchout oil reservoirs will easily take place in gentle slope belts. And then, oil charged in sand body that connected on the flanks of the faults easily take place nearby the tectonic belts that faults relatively developed. The exploration practice〖KG*2〗in Linyin subsag revealed that it has abundant oil resources. The primary factor analysis of main controlling〖KG*2〗factors for〖KG*2〗the lithologic oil reservoir forming suggests that the most important controlling factors are the distribution of delta front sand body and fluxoturbidite body and lake sand body, the characteristics of the sealing and translocation of the fault block and unconformability and the characteristics of the valid cap rocks. Under their main control factors, it formed different types of lithologic oil reservoirs in different tectonic positions and different sedimentary facies in order.
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Key words:
- lithologic oil reservoir /
- control factors /
- delt /
- fluxoturbidite /
- Linyi subsag
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