Evaluation On Reservoir Of Carbonate Rock By Dynamic Analysis

The most protruding question of carbonate reservoir are extremely strong unhomogeneity and dual porosity model characteristics. The Tahe reservoir Ordovician carbonate rock belongs to the type reservoir that this is special.The carbonate reservoir rock includes many influence factors that it is through many phases structure bursts and the ancient karst to act on jointly the formation and with which the rock karst gives first place. The complicated oil field of karst cave and crack are controlled by limestone reservoir and the crevices-cave system, which have many characteristics such as vivid and great in style, irregular distribution, the limestone cave in crack and unhomogeneity of rock etc. These kinds of reservoir belong to a world difficult and extreme problem on valuation and cognition.The author makes effort to the dynamic information in development, Exploring the method to study and appraises the characteristic on carbonate rock. The major research is as follows.(1) Combining Tahe oil field information of static and dynamic state analysis and the practice, carbonate rock oil reservoir dividing making up the model for three kinds: crevices-cave system, double-crack system and crevices-pore system. The author Puts forward using double pore model and two permeability model and triple medium models to represent its infiltrating fluid model and studies partly the infiltrating fluid.(2) Various kind of test well curve form characteristic crevices-cave model on reservoir was studied. The test well curve of carbonate seam cave oil reservoir divides to 7 styles: homogeneity, double-pore, vertical-transmitting, compound, low-seepage, double-seepage and triple medium.(3) Using develops nonhomogeneity of well production data research reservoir. Add up to the oil deposit carries on parameters such as year, month output, daily output and oil pressure moisture content etc, and uses the man-made nerve communication method to analyze the nonhomogeneity characteristic of seam cave mould oil deposit system. Analyze the major infiltrating fluid direction for guidance oil gas next step developing.(4) By way of the different technology means, studies the pressure system of oil reservoir , and gain comparatively reasonable and accurate original stratum pressure. For the first time put forward to use disturbing between the pressure on stratum changes, and the kind interference test and the between well test etc, and studies between the well of oil the connectivity. Some technology method and the research train of thought are provided.(5) Apply the material of static and dynamic state, in accordance with the factor ( reservoir and the development factor ) that influences the carbonate oil reservoir development, with the double medium model is developed the oil simulation. On the simulated foundation of mechanism, The author Analyses to study the relation that the developing trends, containing water and drives oil mechanism etc in Tahe oil field Ordovician system reservoir.