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An accurate Method to calculate the Stimulated Reservoir Volume

IP.com Disclosure Number: IPCOM000243874D
Publication Date: 2015-Oct-23
Document File: 2 page(s) / 166K

Publishing Venue

The IP.com Prior Art Database

Abstract

We disclose a method which can be used to calculate the Stimulated Reservoir Volume constructed on the microseismic event cloud The mathematic method is called simplex integration The outside boundary of the microseismic event cloud can be connected with a series of polygons and form a general three dimensional block The volume can be calculated exactly by this disclosed method This method is analytical Hence it is accurate and is much more accurate than the any other numerical methods Moreover this method is not limited to the calculation of the Stimulated Reservoir Volume SRV any physical properties which are defined on SRV and can be expressed as a polynomial function can be calculated exactly with this method

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An accurate Method to calculate the Stimulated Reservoir Volume

We disclose a method which can be used to calculate the Stimulated Reservoir Volume constructed on the microseismic event cloud. The mathematic method is called simplex integration. The outside boundary of the microseismic event cloud can be connected with a series of polygons and form a general three dimensional block. The volume can be calculated exactly by this disclosed method. This method is analytical. Hence, it is accurate, and is much more accurate than the any other numerical methods. Moreover, this method is not limited to the calculation of the Stimulated Reservoir Volume (SRV), any physical properties which are defined on SRV and can be expressed as a polynomial function can be calculated exactly with this method.

Description:

Figure 1: Integration on a 2D block

Figure 2: Integration on a 3D block

An integration of a two dimensional block shown in Figure 1 can be calculated by the following formula:

 

where  is the area of triangle P0P1P2 with a minus sign, and the rest of terms in above equation are the areas of triangle P0P2P3, P0P3P4, P0P4P5, P0P1P5.

Similarly, an integration of a three dimensional block shown in Figure 2 can be calculated by extending the 2D formula. Most importantly, the points on the surface have to be arranged in a systematical order: either clockwise or counterclockwise.

The proposed steps are: take the coordinates of microseismic events, create the polygons on top of these...