Supporting technique of water plugging detection in horizontal wells of heavy oil reservoir in Liaohe oilfield

In order to solve the technical problems of water plugging with low segmented accuracy and low success rate of water plugging in horizontal wells with liquid production profile tester for heavy oil horizontal wells in Liaohe oilfield, the supporting technique of water plugging detection in horizontal wells of heavy oil was carried out. The fluid producing profile measuring instrument of horizontal wells was developed, the temperature-resistance can be up to 178℃, the test depth is 3 300 m, a matched set of water plugging tools in horizontal wells was developed, the accurate segmentation of horizontal segmentation accuracy can be up to 1 m, the formula system of the chemical plugging agent was optimized, and the breakthrough pressure after sealing can be reached to 11 MPa/m. Field tests show that the technique solves the technical problems of heavy oil horizontal wells in Liaohe oilfield and improves the development effect of horizontal wells in heavy oil reservoir.