Three Dimensional Space Characterization Of Internal Interlayers Of The I3 Sand Body In The Eastern Xing-6 Block

Reserves in the fluvial delta deposit reservoir of the Xing-6 Block are mainly concentrated in the thick oil layer. However, at present, because of the development of water injection, all thick oil reservoirs have water, and oilfield development faced high water stage, deducing the difficulty of tapping increased. The reservoir can be divided into three flow units of a plurality of connected, semi connected and disconnected by the interlayer in thick oil layers. Therefore, it is important to determine the existence of interlayer and its influence for the internal fluid in the reservoir.13 representative wells are selected in this study. By the technology of well seismic modeling, high precision sand body modeling,3D space modeling of interlayer and Graphics Processing Unit perspective of interlayer, the fine characterization of interlayer in selected wells is described and 3D visualization maps are made.35 interlayers in the study area are identified, including 14 interlayers in the layer of PI32,21 interlayers in the layer of PI332. The 3D space distribution and the perspective of the interlayer are drawn. By the analyses of the above maps, the types of interlayer can be divided into three types:transitional, stochastic, and continuous. Based on those different types of interlayer, it can be further analyzed its influence of the oil field development.Based on the 3D maps, combined with the actual production conditions, the influence of the existence of the interlayer on the fluid flow in the reservoir, and of the continuity of the interlayer on the measure can be evaluated. According to different influence, some individual adjustment on the production well or injection well was done. In view of the actual effect, after the adjustment, the water amounts of production well are decreased and then the oil-product amounts are increased, achieving good results. Therefore, the fine characterization of interlayer can provide reference and basis for the effective use of remaining oil and production adjustment in a high water period.