US 12,140,719 B2
Correction method for micro seismic interpretation fracturing fracture parameter result
Bing Hou, Beijing (CN); Yue Xiao, Beijing (CN); Yan Jin, Beijing (CN); Bowen Cao, Beijing (CN); and Mian Chen, Beijing (CN)
Assigned to CHINA UNIVERSITY OF PETROLEUM (BEIJING), Beijing (CN)
Appl. No. 17/593,927
Filed by CHINA UNIVERSITY OF PETROLEUM (BEIJING), Beijing (CN)
PCT Filed Jul. 7, 2020, PCT No. PCT/CN2020/100548
§ 371(c)(1), (2) Date Sep. 28, 2021,
PCT Pub. No. WO2021/004442, PCT Pub. Date Jan. 14, 2021.
Claims priority of application No. 201910626869.X (CN), filed on Jul. 11, 2019.
Prior Publication US 2022/0206174 A1, Jun. 30, 2022
Int. Cl. G01V 1/30 (2006.01); E21B 43/267 (2006.01); E21B 49/00 (2006.01); G06F 18/2431 (2023.01)
CPC G01V 1/301 (2013.01) [E21B 43/267 (2013.01); E21B 49/00 (2013.01); G06F 18/2431 (2023.01); E21B 2200/20 (2020.05); G01V 2210/646 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A correction method for micro seismic interpretation of fractured well parametric data, the method comprises:
A. classifying communication modes of block sampling fractured wells to be corrected according to a matching degree of micro seismic monitoring result and sand adding amount to obtain a plurality of classified fractured wells;
B. correcting a volume coefficient Bv of each of the classified fractured wells, wherein the volume correction coefficient Bv of each of the classified fractured wells is represented by an expression:

OG Complex Work Unit Math
wherein, [L5/4H]W is a calculation value of a micro seismic monitoring interpretation result; [L5/4H]T is a theoretical calculation value obtained by using field construction parameters;

OG Complex Work Unit Math
wherein, in the above formula,
L is a fracture half length and the unit is m;
H is a fracture height and the unit is m;
Ef is a total fracture initiation efficiency;
Vi is an amount of effective fracture initiation fluid and the unit is m3; Vfp is an amount of pre-fluid and the unit is m3;
Vfs is an amount of sand carrying fluid and the unit is m3;
μ is a viscosity of fracturing fluid and the unit is Pa·s;
Q is a flow rate and the unit is m3/min;
ν is Poisson's Ratio of a rock through which the classified fractured well is drilled;
E is the elastic modulus and the unit is GPa;
if Q is equal to a surface total flow rate, α=1.26; and
if Q is equal to half of the surface total flow rate, α=1.5;
C. calculating a classification volume correction coefficient of each class of fractured wells according to the calculated single well volume correction coefficient of each fractured well, wherein the classification volume correction coefficient of a class is the average of the calculated single well volume correction coefficients for a class of fractured well; and
D. reconstructing artificial fractures by using original micro seismic data while considering the classification volume correction coefficient for each class of the classified fractured wells.