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近几年,由于探索侧向低产油井的重复压裂改造技术的研究不断深入,从2000年开始,人们大量研究试验了暂堵压裂技术,现场应用增产效果明显。目前这一技术己经在安塞油田开始推广,成为老井改造的主要手段。本文针对安塞油田长6油层天然微裂缝发育、油层非均质严重、部分油井注水见效程度低、常规压裂效果差的状况,研究试验了暂堵压裂技术及配套的压裂液体系,现场应用增产效果明显,为长6油藏低产油井的重复改造提供了新的途径。
In recent years, due to the deepening researches on the technology of repeated fracturing to explore lateral low-yield wells, from the beginning of 2000, a great deal of researches and studies have been made on the temporary plugging and fracturing technologies. At present, this technology has started to be popularized in Ansai Oilfield and has become the main means of rebuilding old wells. In view of the natural micro-fractures in Chang 6 reservoir of Ansai Oilfield, the serious heterogeneity of oil reservoirs, the low degree of effectiveness of partial injection in oil wells and the poor effect of conventional fracturing, the temporary plugging fracturing technology and associated fracturing fluid system were studied and studied. The field application of stimulation has obvious effect, which provides a new way for repeated alteration of low production wells in Chang 6 reservoir.