A Precise Classification Method of Reservoir Sorting Properties
A sorting and reservoir technology, applied in instrumentation, geometric CAD, calculation, etc., can solve the problem that it is difficult to accurately and quantitatively express sorting characteristics, and achieve the effect of low prediction cost, strong practicability, and strong operability.
Inactive Publication Date: 2019-09-06
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 boundaries of particles or pore throats, and use digital software to digitize pore throats or particle boundaries.
[0037] 2) Convert the obtained particle or pore throat boundary to 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 the particles or pore throats are distributed, set d=100. For the i-th survey line, interpolate to obtain a data set G with a spacing of d i , For the set G i Any point in P(P xi , P yi ), when two points in the set Q satisfy formula (1) at the same time, the point is considered to be the intersection of the survey line and the particle or pore-throat boundary filling data point, and the number of intersection points in each survey line n i , The set of intersection coordinates is denoted as U i (U xm , U ym ), where m≤n i .
[0039] 4) For the intersection set U of the i-th ...
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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 oil and gas field exploration and development, and mineral evaluation and prediction, in particular to a method for accurately dividing reservoir sorting properties. Background technique [0002] The sortability refers to the uniformity of the thickness of the debris particles or pore throats. The sorting performance is good if the size is uniform; the sorting performance is poor if the size is mixed. The description of rock particles and pore throats includes particle shape, size, roundness, and sortability, which are important factors that affect the transport and mechanical properties of the rock. Among them, the sortability of the reservoir is an important factor affecting the physical properties of the reservoir. Factors can reflect the degree of reservoir homogeneity and are also a sign of hydrodynamic strength. The sortability of the reservoir is divided into particle size sorting and pore throat sorting, which...
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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)