US 11,841,348 B2
System and method for evaluating the effect of proactive utilization of spatial stress field in laboratory
Caoxiong Li, Beijing (CN); Chenggang Xian, Beijing (CN); Yinghao Shen, Beijing (CN); and Guoxin Li, Beijing (CN)
Assigned to China University of Petroleum Beijing, Beijing (CN)
Filed by CHINA UNIVERSITY OF PETROLEUM-BEIJING, Beijing (CN)
Filed on Apr. 28, 2022, as Appl. No. 17/732,477.
Claims priority of application No. 202111659090.1 (CN), filed on Dec. 30, 2021.
Prior Publication US 2023/0213423 A1, Jul. 6, 2023
Int. Cl. G01N 3/12 (2006.01); G01N 15/08 (2006.01)
CPC G01N 3/12 (2013.01) [G01N 15/082 (2013.01); G01N 2203/0019 (2013.01); G01N 2203/0048 (2013.01); G01N 2203/0066 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A system for evaluating an effect of proactive utilization of a spatial stress field in laboratory, comprising:
a rock sample placement device for placing a rock sample which is provided therein with a plurality of wellbores, the wellbores being provided with a plurality of perforations, the perforations in any adjacent two of the wellbores are staggered in horizontal and vertical directions of the rock sample;
a confining pressure control device for applying a set confining pressure to the rock sample in the rock sample placement device to simulate an original in-situ stress field of the rock sample in an actual formation;
a fracture imaging device for acquiring morphology and number of fractures inside the rock sample;
a fracturing fluid injection device connected to one end of the wellbores of the rock sample, for injecting fracturing fluid into the perforations in the wellbores of the rock sample to form fractures within the rock sample;
a stress measurement device for measuring stress values inside the rock sample while injecting the fracturing fluid into the perforations of the wellbores by the fracturing fluid injection device; and
a processing device for calculating a stress field proactive utilization coefficient of the rock sample based on morphology of the fractures, the number of the fractures, and the stress values, and for quantitatively evaluating the effect of proactive utilization of the spatial stress field according to the stress field proactive utilization coefficient and a preset proactive utilization coefficient threshold value.