Liaohe Oilfield Du 84 Xing Ⅵ Group Interlayers And Influence On Development Effect

Currently interlayers studied in this paper is mainly to study the effective thickness of the interlayers. Internationally, the former Soviet scholars believe that, under normal conditions of steam flooding, 1m thick mudstone continuous distribution is enough to prevent vertical movement of steam, play a good role in the packer. Scholars believe that Canada and other countries, a continuous distribution of 2m thick mudstone to prevent vertical movement of steam, thin shale interbeds sporadic distribution does not affect the expansion of the steam chamber, less than 2m thick mudstone steam can penetrate the barrier.The purpose of the reservoir through the stratigraphic sequence and set of fine-grained layer of DU 84 VI Formation division were redefined to describe reservoir characteristics, as the basis for division of interlayers. Through its structural features and depositional setting to study tectonic reservoir characteristics, to determine the overall reservoir sedimentary background, with a reservoir sedimentary facies and structural characterization interlayers formation mechanism, describing interlayers deposition characteristics. By studying reservoir characteristics, describe reservoir properties of space and petrophysical characteristics, thus further reservoir heterogeneity Africa- across distributed describe sandwich on interlayers seepage under different shielding properties of lithology study determine the relationship between electric rock interlayers and different characteristics interlayers blocking effect on the size of the steam chamberThis paper presents research on improving development effectiveness, due to the impact of reservoir inside the sandwich, use less oil overall level of the upper reservoir basic sandwich was not available to a typical well group by establishing numerical model, in order to further enhance oil recovery, optimization of existing injection and production parameters to improve development effectiveness, implement flooding vent complex development, namely in the lower part of the sandwich using SAGD development, mezzanine upper vertical wells using steam flooding, and achieved good development results.