Application of one-bag plugging technology in Tahe oilfield
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摘要: 针对塔河油田奥陶系缝洞型储层易井漏、堵漏浆难以滞留、堵漏配方和工艺复杂的难题，提出了理想填充-紧密堆积理论结合的思路。通过优选可酸溶堵漏材料及其颗粒级配，研究形成封堵1～5 mm不同尺寸裂缝的5套堵漏配方，室内承压能力在10 MPa以上，酸溶率超过75%。上述堵漏配方分别生产为一袋化产品，在塔河油田X13H井和X193井奥陶系储层堵漏均一次成功。新型一袋化堵漏技术的配方颗粒级配和施工工艺合理有效，且实现了可酸溶解堵。Abstract: When drilling in the Ordovician fractured-and-vuggy reservoirs in the Tahe oilfield, leakage often occurs. It is difficult to stop plugging slurry leakage, and the formula and processing of plugging slurry are complex. An idea combining ideal filling and close packing theory was put forward. Acid-soluble plugging materials were selected according to different grain sizes, and five sets of plugging slurry formula were made for fractures 1-5 mm wide. The indoor pressure capacity is 10 MPa or more, and the acid solution rate is more than 75%. Some one-bagging products were made according to the above formula, and achieved success in the Ordovician reservoirs in wells X13H and X193. The particle composition and construction technology of the one-bagging products are reasonable, and realized acid solution.
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