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Reservoir Modeling and Remaining Oil Distribution Study on Fractured-Cave Carbonate

Author: LiHongKai
Tutor: KangYuZhu
School: Chinese Geology University (Beijing)
Course: Mineral prospecting and exploration
Keywords: fractured-cave carbonate reservoir modeling multi-point geostatistics fracture modeling remaining oil distribution
CLC: P618.13
Type: PhD thesis
Year: 2012
Downloads: 437
Quote: 1
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Abstract


In recent years, the reservoir stochastic modeling has become the research hotbut difficult problem as the reservoir characterization become refinement.Establishing a reservoir model which can represent the space distribution and thechanges of the reservoir and providing a reliable geological model for solving theproblem of remaining oil distribution are the urgent work of geologist. In this paper,the author analyzes the advantage and disadvantage between different modelingmethods and chooses multi-point geostatistics as the method of modeling. The S48unit reservoir model is established at the base of a variety of static and dynamic dataand the author analyze the remaining oil distribution by numerical simulation .Themajor research is as follows.(1)Unfilled cave,part_filled cave,filled cave,I type reservoir and II type reservoirare distinguished in the well according to the drilling, well logging ,well productionand production segments mainly, adding to the cores and seismic data also.(2)According to the analysis of seismic attributes and reservoir type, the authorbuild the relationship between the seismic attributes (RMS and coherent) and the caveand calculate the probability of the cave reservoir.(3)At the base of the five reservoirs and the probability of the cave,the authorestablish the reservoir model through grade modeling technology and comprehensiveutilization of multi-point geostatistics and sequential indicator simulation methods.According to the analysis of porosity and permeability, reservoir property model isestablished.(4)A large-scale fracture model is built through ant tracking technology on thebase of seismic data.The author establish three fracture intensities according to theazimuth by artificial neural networks at the base of imaging logging and then establishthe small-scale fracture model and their property model.(5)At the base of reservoir model and fracture models, according to therequirement of numerical simulation and compute ability, the author upscale themrespectively and establish the numerical simulation model by fluid flow channel rules.(6)After determining the simulation parameters and simulating the producing ofoil, water and gas in S48 unit, the author analyze the remaining oil distribution of it and think the remaining oil is controlled mainly by tectonic position,the degree ofreservoir development and high permeability belt.At last the author point out thepossible location of remaining oil distribution.

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