| During the exploring,evaluating and developing period of the oil and gas field,the aim of reservoir research is to build quantitative geological modeling. Setting up a correct geological modeling that can descript the character of a reservoir is core and purpose of reservoir description,the key of reservoir mathematical stimulation an dynamic forecast,the base of knowing the reservoir impersonally and truthfully and develop in the reservoir efficiently and accurately.The paper take the Shang Li yuan reservoir in MaLing field as the research object. MaLing field has a great variety in the lateral and vertical direction. The reservoir is characterized by high heterogeneity, which makes it very difficult to be developed. Recognizing the heterogeneity or the petrophysical parameters distribution of the reservoir is the key to make rational development polices and develop the field efficiently. in order to increase its hydrocarbon output, making a specific geological model and depicting heterogeneity accurately of the fluvial facies reservoir plays an important role.In this paper, under using different theories and techniques of many subjects including sequence stratigraphy, sedimentology,petroleum geology, reservoir geology, petroleum reservoir engineering and so on, make the sublayer division and comparison between different wells, according to the characteristics of sedimentation cycle and rhythm and the method of isometry comparison.As the result is that 11 sublayers are divided in the research intended interval yan8~yan10 ;base on the core watching, thin slice data and log data, sub-sedimentary facies are identified including piont bat,chanel, meander bar,head-sandbar, natural levee, crevasse splay, flood plain, swamp and so on in the research area.The physical property character of reservoir is analysed and researched detailedly,the physical property of yan8 and yan9 is better in Li 14 and Li 25 well aeras , in Li 23 wells the yan9 is best ,according to the evaluation criterion , reservoir is evaluated and classified by the reservoir character ,the sand is theâ…¡a-â…¡b kind of reservoir; which in 1559.59m of yan92 and 1594.35m of yan101 has such the character as mesoporosity, low-permeability, better-sorted, a little slender flexure, higher-drainage pressure, high median pressure , the sand in 1592.42m of yan101 is theâ…¢kind of(poor) reservoir, which has the character of low-porosity, low-permeability, poorly-sorted, slender flexure, lower- drainage pressure, higher-median pressure ;seven specimens in yan83,yan92 and yan101 of the well Li 2-13 are theâ… c andâ…¡a kind of reservoir.By studing the aeolotropy feature of reservoir, the permeability differential of sand in three well field of Shang Li yuan is lower and the interformational aeolotropy is weaker.The plane aeolotropy of yan83 is strongest which has the highest permeability variation coefficient, yan101 is secondary and yan81,yan91,yan92 is the worst with the lowest permeability variation coefficient.The region of research is divided into flow units:Take the yan 81 for example, the area near to the wells li22-9,li 22-10 is divided asâ… flow unit;li23-9,23-10 asâ…¡flow unit and li22-9 asâ…¢flow unit and so on. It reveals the relationship-feature between the flow unit and the sub-sedimentary facies namely theâ… andâ…¡flow units are distributed in meander bar and point bat of the river center and theâ…¢flow unit is mainly distributed in the top of sandbar ,crevasse splay and natural levee.Basing on the geologic researches before, drawing support from Petrel2004 software, the Triaxial tapering geological models of reservoir structure ,sub-sedimentary facies and attribution about Shang Li Yuan are established. This reflexes the geology situation interior of the earth objectively and truly and reveals the regular pattern of oil and gas emplacement and becomes the base of developing the reservoir efficiently and accurately.
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