Precise reservoir stratum sorting property partitioning method
A sorting and reservoir technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problem of difficulty in accurately and quantitatively expressing sorting characteristics, and achieve low prediction cost, strong operability, and practicality. strong effect
Inactive Publication Date: 2017-03-22
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology
In actual reservoirs, natural particles and pore throats are mostly irregular shapes, and it is difficult to accurately and quantitatively express their sorting characteristics
Method used
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specific Embodiment approach
[0036] 1) Use digital software to digitize the boundary of particles or pore throats, and use digital software to digitize the boundaries of pore throats or particles.
[0037] 2) Convert the obtained particles or pore throat boundaries into data points ( figure 2 ), set the filling step length b = 10m, and obtain the particle or pore-throat boundary data point set Q after filling.
[0038] 3) In the rectangular area where particles or pore throats are distributed, d=100 is set, and for the i-th measuring line, a data set G with a distance of d is obtained by interpolation i , for a set G i Any point in P(P xi , P yi ), when there are two points in the set Q satisfying formula (1) at the same time, the point is considered to be the intersection point between the survey line and the particle or pore-throat boundary filling data point, and the number n of intersection points in each survey line is obtained i , the set of coordinate positions of the intersection point is den...
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The invention relates to the fields of oil and gas field exploration and development and mineral product evaluation and prediction, in particular to a precise reservoir stratum sorting property partitioning method. The method comprises the steps that boundaries of particles or pores are numeralized through datamation software, particle or pore throat boundary datamation points are obtained, the filling step length is set, the equivalent diameter of the particles or the pore throats is solved by counting the intersection frequency of measuring lines and the particle or pore throat boundary filling data points and filling measuring line data points, quantitative calculation on the sorting property of the particles or the pore throats is achieved, and then a set of programming calculation methods for the particle or pore throat sorting property are proposed. According to the precise reservoir stratum sorting property partitioning method, precise partitioning on the particle size sorting property and the pore throat sorting property is achieved, and the method is not only suitable for reservoir stratum sorting, but also suitable for calculating the roundness degree and the sphericity of rock particles.
Description
technical field [0001] The invention relates to the fields of exploration and development of oil and gas fields and mineral evaluation and prediction, in particular to a method for accurately classifying reservoir sorting properties. Background technique [0002] Sorting performance refers to the uniformity of the thickness of debris particles or pore throats. If the size is uniform, the sorting performance is good; if the size is mixed, the sorting performance is poor. The description of rock particles and pore throats includes particle shape, size, roundness, and sorting, which are important factors affecting the transport characteristics and mechanical properties of rocks. Among them, the sorting of the reservoir is an important factor affecting the physical properties of the reservoir. factor, which can reflect the degree of reservoir homogeneity and is also a symbol of hydrodynamic strength. The sorting properties of reservoirs are divided into particle size sorting an...
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IPC IPC(8): G06F17/50
CPCG06F30/17
Inventor 刘敬寿丁文龙杨海盟黄昌杰徐海强卢霖金林
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)