Thermal recovery method of heavy oil with gel foam inhibiting bottom water coning
A technology for thermal recovery of gel foam and heavy oil, which is applied in the fields of production fluid, earthwork drilling, wellbore/well components, etc. It can solve the problems of reducing the water content of horizontal wells, being unable to use granular plugging agents, and plugging bottom water, etc. problems, to achieve the effect of improving steam sweep coefficient and utilization rate, improving reservoir development effect, and delaying coning speed
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[0043] 1. Basic situation of oil wells
[0044] Measure Well Chun 10Ⅱ2-9-3H is a horizontal oil production well in the eastern Junggar Basin. The drilling completion layer is the Ⅱ2 sublayer of the first member of the Shawan Formation. N 1 S 1 II 2 Sand roof): the oblique depth is 1066.00m, the vertical depth is 960.41m, and the horizontal displacement is 195.19m.
[0045] 2. Design idea and water shutoff parameter design
[0046] Design ideas:
[0047] Using gel foam water blocking technology, the design idea is to use three slugs: front slug, main body slug and replacement slug. The front slug mainly uses nitrogen, which pushes the water in the wellbore and the formation near the wellbore to the oil layer, and at the same time balances the formation pressure; the main slug injects nitrogen and gel foam agent to form a nitrogen-gel foam section in the water channeling channel plug to suppress bottom water intrusion; the replacement slug is a nitrogen slug, which mainly ...
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