Method for valuing oil saturation of tight sandstone
A tight sandstone and saturation technology, which is applied in the field of tight sandstone oil saturation, can solve the problems of limited exploration cost and exploration goals, and the inability to accurately calibrate and calculate reservoir oil saturation, and achieve strong operability Effect
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Embodiment 1
[0032] Example 1 Aiming at the value method of tight sandstone oil saturation
[0033] The method comprises the steps of:
[0034] Step 1. According to the phase permeability curve, draw water production rate-water saturation relationship plate 1;
[0035] Step 2. Read the water saturation value Y corresponding to the water production rate (Fw) 0% and 90% of each sample in sequence 1 , Y 2 , denoted as Plate 2;
[0036] Step 3, the porosity, permeability and water saturation value Y of each sample 1 , Y 2 As a group of data; put each group of data into the intersection chart 3 where the horizontal axis is the reservoir quality index (the root of the ratio of permeability to porosity), and the vertical axis is the water saturation;
[0037] After obtaining the reservoir quality index of each sample, put the reservoir quality index corresponding to all core samples with relative permeability data, the water saturation corresponding to Fw=90% and the water saturation corresp...
Embodiment 2
[0046] Example 2 Aiming at the value method of tight sandstone oil saturation
[0047] The method comprises the steps of:
[0048] Step 1. According to the phase permeability curve, draw water production rate-water saturation relationship plate 1;
[0049] Step 2. Read the water saturation value Y corresponding to the water production rate (Fw) 0% and 90% of each sample in sequence 1 , Y 2 , denoted as Plate 2;
[0050] Step 3, take the porosity, permeability, and water saturation values Y1 and Y2 of each sample as a set of data; put each set of data on the horizontal axis as the reservoir quality index (the root of the ratio of permeability to porosity ), the vertical axis is the intersection plate 3 of water saturation;
[0051] After obtaining the reservoir quality index of each sample, put the reservoir quality index corresponding to all core samples with relative permeability data, the water saturation corresponding to Fw=0% and the water saturation corresponding to F...
Embodiment 3
[0053] Example 3 The value method for oil saturation of tight sandstone
[0054] The method comprises the steps of:
[0055] Step 1. According to the phase permeability curve, draw water production rate-water saturation relationship plate 1;
[0056] Step 2. Read the water saturation value Y corresponding to the water production rate (Fw) 10% and 90% of each sample in sequence 1 , Y 2 ;
[0057] Step 3, take the porosity, permeability, and water saturation values Y1 and Y2 of each sample as a set of data; put each set of data on the horizontal axis as the reservoir quality index (the root of the ratio of permeability to porosity ), and the vertical axis is water saturation in intersection panel 3
[0058] Calculate the reservoir quality index (the square root of the ratio of permeability to porosity) of each sample, and then calculate the reservoir quality index corresponding to all core samples with relative permeability data, and the water saturation corresponding to F...
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