东营凹陷古构造对下第三系储集体的控制作用

东营凹陷下第三系是典型的断陷湖盆沉积，沉积与古构造活动关系密切。北部陡坡带主要发育各种成因的砂砾岩扇体，基岩的起伏和断层活动控制了扇体的成因类型和展布。由于该带上的单断式构造坡折带与台阶式结构坡折带的断层活动有差异，造成扇体的沉积体系不同；中部洼陷带位于主控断层下降盘，广泛发育三角洲前缘肖塌浊体积系。东营三角洲的3期东向西的进积分别与沙三段沉积期的3期构造运动相对应；南部缓带带发育一系列反向调节断层，导致同一斜坡差异沉降，主要发育辫状河三角洲或滨浅湖沉积体系。通过对东营凹陷上第三纪古构造活动对沉积体系、骨架砂体控制作用的研究，明确了储集体与断裂体系的配置关系，对该区下一步蔽油藏勘探和井位部署有一定指导意义。

Controlling of Dongying sag structure on the Tertiary sedimentary sands bodies

Tertiary system in Dongying sag is of typical faulted lake-basin deposits, and its structural activity is tightly relative to sedimentation. Dongying sag is divided into three facies belt such as actic region, sag region and ramp region. Through the study, the authors find that the north of the slope break region of the slope structure in the basin developed mainly the variable genesis glutenite fan bodies, the subsalt relief and fault activity controlled the genetic type and through-going of the fan bodies. Because the fault activities in the single-fault slope break are different from that in step-steep slope break, the sedimentary system of glutenite fan bodies controlled by the fault is also different. Basin deep sag lies in downthrow of fault with developing sidely delta front fluxoturbidite. There are totally three propels from east to west. Three propels correspond to structure action of S3, S2 and S1 respectively. South ramp region results in differential settlement of deposit slope on the same slope due to a series of development of reverse adjusting fault, controlling a set of braided river delta or shallow lake shore system. Tertiary palaeostructral activity in Dongying sag and its control on settlement system and skeletal sand are studied to find the arrangement relation between reservoir and fracture system. It's of great importance to next exploration for subtle reservoirs.