Hydraulic fracturing is the use of high pressure over formation fracture pressure flow, laminated on purpose with a certain direction and open a crack geometry and injection support particles, forming a high conductivity sand filling cracks, which greatly improved reservoir the ability of the liquid flow to the wellbore, thereby increasing oil and gas production capacity of a low-permeability reservoir reservoir effective method of transformation.
Block reservoir is mostly affected by various fault-controlled structural reservoirs, usually rock stress orientation and distribution of reservoir fracturing directly control when the direction of crack extension Chung, main faults in joint and combined stress field is generated. Long-term research and practice that: hydraulic fracture extension direction is always parallel to the ground or the maximum horizontal principal stress direction perpendicular to the strike of the fault.
Well today the formation of different zones of maximum principal stress direction may change, Pucheng Oilfield Shasan part of the hydraulic fracture wells with hydraulic fracturing extending direction approximately parallel to the direction of the main fault exists.
Two or more wells nears, hydraulic fracture will first require the old hydraulic fracture stress caused by the weak area extends, making hydraulic fracture perpendicular to the extending direction of the fault.
To obtain more accurate hydraulic fracturing parameters should use different fracture monitoring technology for comprehensive testing and evaluation studies rediscover predict hydraulic fracture extends to the field development well network deployment and implementation of measures hydraulic fracturing has important guiding significance.
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