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欢西油田是一个地质条件十分复杂的断块油田,目前已进入高勘探成熟度阶段,给包括老井试油在内的滚动勘探工作带来了一定的困难。针对这一情况,我们从小套管深层侧钻、下台阶油气水层精细识别、断块整体研究挖潜、油砂体精细劈分试采未动用油水层、边远未利用井试采、上台阶稠油层试采等方面做工作,优选实施了64口老井进行试油试采,其中54口获工业油流,成功率84.4%,增加含油面积2.17km~2,增加石油地质储量138×10~4t,日增油572.3t/d,累增油7.991×10~4t,取得了显著效果。该技术适合欢西油田复杂断块疑难井层的挖潜工作,尤其对欢西油田下一步老井试油工作具有较大指导意义。
Huanxi Oilfield is a complex geological fault block oilfield, has entered the stage of high exploration maturity, including the old well test oil exploration, including the rolling work has brought some difficulties. In view of this situation, we have carried out deep lateral drilling of small casing, fine identification of oil and gas water layer in the next step, tapping the potential of fault block as a whole, fine splitting test of unused oil-water layer in the oil sand body, Oil well test and other aspects of the work, the implementation of a pilot test of 64 old wells, of which 54 were industrial oil flow, the success rate of 84.4%, an increase of oil area 2.17km ~ 2, an increase of oil geological reserves of 138 × 10 ~ 4t, daily oil 572.3t / d, cumulative oil 7.991 × 10 ~ 4t, achieved remarkable results. This technique is suitable for the potential tapping work of complex fault blocks in the Huanxi Oilfield, and has a great guiding significance for the next test of old wells in Huanxi Oilfield.