Lumbar English Taiwan Reservoir Description And Prediction

The YaoYingtai area is located in the east high slope of Changling depression and low heave of Da Qingzi in Songliao basin, Northeast China. The structure of target intervals is monocline incised by many normal faults orientated in NNE direction. Based on the preceding research. We integrating geology, well-log and three-dimensional seismic measures to analysis the sediments and spreading of sandstone, the types of trap and the location of avail targets, The main conclusions are showed below.1)A great deal of well-log, lithologic and seismic data were analyze to resolve the problems in stratigraphic dividing, sedimentary character and reservoir prediction in Yaoyingtai field from the older QuanSi Member to the younger Qinshankou Formation of Lower Cretaceous, an evolution of fluvial-lacustrine-deltaic-fluvial deposition happed in this area, during which sandstone reservoir such as distributable channel, deltaic frontier, estuarine bars, beach and crevasse channel microfacies formed.2)The target reservoir consists of mainly silt to fine sandstone, with porosity 10%-15% and permeability 0.1-5 × 10-3 μm2 .Due to the intense mechanism compression and ankerite and carbonate cementation that brought into poor petrographic quality, the sandstone reservoir of this area is classified into IIIA-IIIB grade.3)Because the velocity of sandstone and mudstone are almost the same, the routine means as the RMS Amplitude and wave impedance analysis are disabled in reservoir prediction. The changes in seismic attribute as amplitude, wave classification only indicate the existence of pure mudstone being deposited in deep lake environment Horizon slices of Amplitude acceleration and SP inversion show variation in depositional facies and sand distribution.4)A large scale of sandstone reservoir relevant to deltaic system are outlined by means of effective seismic method, which is conformed by lateral bored wells. The best of deltaic frontier and beach sandstone of QingYi Mem spread along the lakeshore in northern and northwestern area of the field.