| 摘要 |
FIELD: oil production industry. SUBSTANCE: multiple-bed oil deposit is developed by system of horizontal wells with preliminary determination of length of horizontal hole of well in each interlayer with taking into consideration its hydraulic permeability. According to method, additionally performed are field and laboratory investigations with determination in each interlayer of output of vertical wells, non-uniformity as to permeability and initial oil saturation, and also balance and movable reserve of oil, coefficient of displacement. Horizontal bore-hole of well is driven through reservoir with distribution of its length through interlayers according to formula:, where L- total effective length of horizontal well;, where n - number of interlayers (beds) of multiple-bed oil deposit; i, j - index of actual interlayer; r - average number of well operating days per year, 24 h;- output of vertical well per unit of conductanceof i-bed, t/day;- coefficient of permeability of i-bed, mcm 2;- effective oil saturation capacity of i-bed, m;- movable oil reserve of i-bed per single well and per 1 m of effective oil saturation thickness of bed h;- maximal calculated water content of well product in i-bed determined with respect to physico-chemical properties of oil and displacing agent, hydrodynamic characteristics and coefficient of oil displacement by injected agent;- average calculated water content of well product at end of development; at moment of reaching Ain every interlayer;- coefficient of flooding; A- accumulated intake of liquid in conditions of beds in proportions of movable oil reserve, determined with respect to non-uniformity of bed as to its permeability and A. Method ensures simultaneous extraction from all beds and cuts entire deposit development periods. All extracted oil reserves are taken at reduced accumulated liquid. EFFECT: high efficiency. |
