摘要:
The invention relates to the field of mining, namely, to the oil and gas extraction, hydrogeologic, engineering and the geologic and water supply industry and provides an apparatus for the cutting of slot-like key seats in the well bore zone of productive strata by means of hydraulic abrasion.
摘要:
The invention includes a method of increasing of the well rate of exploitation and recharge wells, comprising a means of decreasing the stress state in the well area by constructing of slot-like discharge key seats, wherein the slot-like key seats have a screw-like shape, wherein preliminary internal rock friction angles ρ are determined for a rock composing a productive strata, and a pitch of the slot key seat screw is selected such that the tangent of the angle of deviation of the slot surface from the φ vertical will be between tg(45−ρ/2)≧tg(φ)≧1/√3, where ρ—is the internal rock friction angle where the key slot is being made.
摘要:
A system for increasing the productivity of oil, gas and hydrogeological wells has means for cutting slots only in a near well zone so as to perform a partial unloading of the well and to remove a part of support stresses, and means for cyclically treating well with a formation-treating substance so as to remove a remaining part of the support stresses, with controlling a density of a formation and correcting the cyclical treatment in correspondence with the density of the formation.
摘要:
A method of well treatment designed to enhance recovery of resources from the well. A solution with an alkaline pH greater than 8 is introduced into the well and allowed to react in the well for at least a minimum period of time. A neutral solution with a pH near 7 is introduced into the well and allowed to remain in the well for at least a minimum period of time. Finally, a solution with an acidic pH of approximately 1 is introduced into the well and allowed to react in the well for at least a minimum period of time.