A safe and cost-effective method of stimulating a multizone hydrocarbon-producing well is presented wherein a tool containing dry chemical is deployed downhole by wireline. An extended exothermic reaction is initiated downhole that generates acid vapor at a target depth in front of the perforated interval, allowing each interval to be treated uniquely with specific acid blends. This method of acidizing has supplanted the previous method because of its sustained production enhancement and cost-effectiveness.
Field Background
An operator’s field of mature oil-producing wells experienced steadily declining production. The typical well had two unique intervals, one being in the Worsley dolomite and the second in the Worsley siltstone.
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