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Successful Construction of the First Fractured Well with Infinite-order Cementing Slide Bushing and Coiled Tubing Undersealing of Sinopec
Author:Liufei    Readnum:803       Datetime:2015-05-06 15:06

        At 22 oclock of May 1, Sinopecs first fractured technological well DPH-X, which has infinite-order cementing slide bushing adopted for well completion and coiled tubing with undersealing tool adopted for annular pressurizing and pushing slide bushing and annular sand adding, was constructed successfully in Daniu Gas Field.

        Well DPH-X is a horizontal well arranged in large 8 well area in Daniu Gas Field of Erdos, with the target stratum referring to Lower Shihezi Fm No. 1. The well has horizontal segment of 1,030 m long and designed layer of 10 segments, with secondary well structure adopted and Ф139.7 mm bushing plus slide bushing cementing used for well completion. In order to improve low-permeability gas reservoir exploitation effect of the well, special fracturing technology of coiled tubing with undersealing for dragging, annual pressurizing and pushing slide bushing and annual sand adding is adopted for well completion, thus achieving breakthrough in both fracturing technology and yield.

        As the first well of Sinopec with fracturing technology of infinite-order cementing slide bushing, coiled tubing undersealing dragging and sand adding adopted, construction of Well DPH-X from cementing slide bushing entering in early stage to shaft preparation in middle stage and fracturing construction in late stage was undertaken by our Company, which well demonstrated technical service level of the Company and full reliance of Party A on the Company. The well is expected to achieve yield breakthrough after fracturing this time. Presently, the well is opened for gushing and the Company will closely track the effect after pressurizing.