METHOD OF PERFORATION AND TREATMENT OF WELL BOTTOM-HOLE ZONE AND DEVICE FOR METHOD EMBODIMENT Russian patent published in 2002 - IPC

FIELD: oil production. SUBSTANCE: method includes well perforation by hollow-carrier jet-type perforator and implosive action on well bottom-hole zone just at moment of well perforation with taking of well fluid into implosive chamber against holes formed by perforation. Volumes of implosive chamber and perforator body are taken in ratio of (3-12): 1, respectively. After implosive action on formation, it is subjected to fracturing by pressure exceeding that of formation fracturing. For this purpose, thermal gas generator is started. During fuel burning, gas is liberated and gets into perforator body and acts by direct jets through preliminarily formed perforation channels onto perforation channels in formation. Then formation is ruptured by energy of phase explosion. For this purpose, fluid in perforation channels in formation and bottom-hole zone is heated by hot gas directed jets to form metastable fluid. Upon moment of completion of thermal gas generator operation, short-time deep drawdown is created with the help of implosion air chamber with controlled valve. Pressure differential acts on metastable fluid to produce explosive boiling of overheated metastable fluid phase and freed energy acts on channels in formation and fractures between them to enlarge and produce new directed fractures interconnecting perforation channels in formation into single fracture. Effect of formation treatment, formation fracturing and character of device operation are estimated by data of continuous recording in time on pressure and temperature parameters. Location of instrument in well is selected with the help of collar locator. EFFECT: higher efficiency of oil production. 3 cl, 1 dwg