FIELD: oil and gas production.
SUBSTANCE: procedure for construction of well of multi-pay oil field consists in drilling borehole to project depth with opening non-uniform pays of pashiysky horizon, in geo-physical survey, in lowering production string and in its cementing. Drilling is performed without opening a water-bearing section of the pay. At cementing the production string a stop-ring, a device for collar cementing, and a cementing back-throttle valve are located above the pay. Also, integrity of a clay bridge is kept intact between upper and lower pays.
EFFECT: prevention of annulus water flow into well, maintaining collector properties of multi-pay oil field, saving expenditures at construction of well.
2 dwg
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