| 摘要 |
FIELD: hydrogeological industry, particularly enhanced recovery methods for obtaining hydrocarbons. ^ SUBSTANCE: determining low-yield productive formation intervals and forming slot-like discharge entries in the intervals. The slot-like entries are screw-like and have widths of not less than 1/3 of well diameter. Inner friction angles are predetermined for formation rock. Slot-like entry screw pitch is selected so that tangent of slot plane deviation from slot in vertical direction is within the limits determined by analytic formula. Screw-like shape is provided by forming vertical entry section pairs in several stages beginning from productive formation bottom. The entries are directed in radial directions from well axis and each next section pair is located above previous one. ^ EFFECT: increased efficiency of slot well zone stress relief, reduced complexity and labor inputs. |
