Method for determining crossing hydraulic fracturing influence range based on salinity detection method

• Main Authors: WANG XUANLIN, LIU JUN, HUANG CHANGWEN, ZHANG CUILAN, FAN YANYANG, WANG WENCHUN, WANG KAI, XIE FEI, ZHOU JUNJIE, LIU KE, JIANG HECAI, GONG QISEN, HE HUA, ZHANG SHANGBIN, TANG YUDE, SHEN DAFU, CHEN XINGYI, ZHOU DONGPING, LIU DENGFENG, GUO CHENYE
• Format: Patent
• Language: Chinese; English
• Published: 08.11.2019
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; PHYSICS; TESTING

The invention discloses a method for determining the crossing hydraulic fracturing influence range based on a salinity detection method. The method comprises: S1, carrying out sampling on a coal seamnear a hydraulic fracturing operation point and carrying out original salinity detection on a coal sample to measure an original salinity value a of the coal sample; S2, constructing a fractured borehole and carrying out hydraulic fracturing on the fractured borehole under the condition of using fracturing fluid with the salinity b being larger than the a for hydraulic fracturing; and S3, after hydraulic fracturing ending, arranging a plurality of sampling points along the direction of the coal seam and the inclination of the coal seam around the fractured borehole, carrying out sampling on the coal seams of all sampling points respectively, carrying out salinity detection on the coal samples, comparing salinity changes of all sampling points with the original salinity value a, and determining a hydraulic fracturi