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METHOD FOR SHUT OFF OF WATERED INTERVALS OF PRODUCTIVE FORMATIONS IN HORIZONTAL WELLS AT FIELDS WITH LOW-PERMEABLE RESERVOIRS
METHOD FOR SHUT OFF OF WATERED INTERVALS OF PRODUCTIVE FORMATIONS IN HORIZONTAL WELLS AT FIELDS WITH LOW-PERMEABLE RESERVOIRS
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机译：低渗透油藏水平井井筒地层注水区间关断方法
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摘要
FIELD: oil and gas industry.;SUBSTANCE: invention relates to the oil industry and can be used to shut off watered intervals in a productive formation in horizontal wells at fields with low-permeability reservoirs. This method includes treating the watered formation interval with physical action by means of an apparatus for generating elastic pulses in the hydrosphere of a horizontal well and subsequent injection into the formation of the gelling waterproofing composition containing 1.0–5.0 % by weight of sodium silicate and 0.5–1.5 % by weight of chromium acetate, 0.1–0.5 non-ionic surfactant and the rest is water. Said composition is extruded into the formation and a technological pause. At the same time, this device is equipped with an apparent resistance module to detect watered intervals in the horizontal open wellbore and a light absorption coefficient module to detect watered intervals in the horizontal wellbore. Water entry intervals are allocated. Then, injection of a temporarily blocking composition that does not filter into the formation is carried out. Wherein when the device is lifted, each interval is processed by physical action, taking into account the filtration-capacitive properties. In this case, before pumping the waterproofing composition, a fresh water rim is poured into the wells, containing 0.01–0.05 % by weight of the tetrasodium salt of ethylenediaminotetraacetic acid. Further, the induction period of the waterproofing composition at the formation temperature is set to 4–8 hours, and the technological pause is 20–30 hours, after which the well is put into operation.;EFFECT: increasing the efficiency of oil displacement from the reservoir and reducing the production of associated produced water by cutting off high-watered intervals in the horizontal part of production wells.;1 cl, 1 tbl, 1 ex
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机译：技术领域本发明涉及石油工业，并且可以用于在具有低渗透率储层的水平井中关闭水平井的生产地层中的浇水间隔。该方法包括通过在水平井的水圈中产生弹性脉冲的设备通过物理作用处理浇水的地层间隔，然后注入到含有1.0-5.0％重量百分比的硅酸钠和0.5％的胶凝防水组合物中重量百分比为–1.5％的乙酸铬，0.1–0.5非离子型表面活性剂，其余为水。所述组合物被挤出到地层和技术暂停中。同时，该装置配备了视在阻力模块以检测水平裸眼井眼中的注水间隔和光吸收系数模块以检测水平井眼中的注水间隔。分配进水间隔。然后，注入不会过滤到地层中的暂时封闭的组合物。其中，提起设备时，应考虑过滤电容特性，通过物理作用处理每个间隔。在这种情况下，在泵送防水组合物之前，将淡水边沿倒入孔中，其中包含0.01-0.05％（重量）的乙二氨基四乙酸四钠盐。此外，在地层温度下将防水组合物的诱导期设置为4–8小时，技术暂停时间为20–30小时，然后将油井投入运行。;效果：提高了驱油效率。通过切断生产井水平部分的高水位间隔来减少储层并减少相关产出水的产量。; 1 cl，1 tbl，1 ex
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