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METHOD OF MULTIPLE HYDROFRACTURING OF FORMATION IN OPEN HOLE OF HORIZONTAL WELL

机译：水平井裸眼地层的多次水力压裂方法

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摘要

FIELD: mining.;SUBSTANCE: method comprises the drilling of a horizontal well bore in oil saturated part of the productive formation of the well, tripping of the pipe string into the well, the forming of perforations and fractures using the a hydrofracturing of formation in the hole of horizontal well, successively, starting from the end of far from the vertical borehole axis. During the next hydrofracturing the section, through which hydrofracturing is performed, is insulated from another part of the string with a packer. During drilling of the horizontal well bore the permeability and porosity of rocks are determined and the intervals of the productive formation with low permeability and porosity of rocks are identified, and on completing of drilling the rock hydrofracturing pressure is determined in each interval of the horizontal borehole. Then the volumes of fracturing fluid and acid for each interval of the oil saturated part of the formation with low permeability and porosity are determined, then the pipe string is moved to the interval of the productive formation nearest to the borehole bottom, with low permeability and porosity, the mechanical packer is seated, from hole mouth using the pumping unit the gelled fracturing fluid is injected into the pipe string through nozzles of the water jet tool and reshape perforations, then, not stopping injection gelled of fracturing fluid on a pipe string, construct fracture pressure applicable to the given interval of the oil saturated part of the productive formation. After 30% drop of pressure of injection of gelled fracturing fluid in the pipe string the hydrofracturing fractures are formed, for this purpose into the annular space of the well an acid is injected at the variable flow rate ensuring maintaining of pressure of injection of gelled fracturing fluid in the pipe string 10% less than the fracture pressure for the given interval of the oil saturated part of the productive formation. The packer releasing is performed and the pipe string is removed from bottomhole to the mouth into the following interval of the oil saturated part of the formation with low permeability and porosity of rocks for forming perforations and conducting of a hydrofracturing of the formation with forming and progressing of fractures.;EFFECT: shortening time for formation hydrofracturing, improvement of performance and reliability of formation hydrofracturing.;3 dwg

机译：领域：方法：包括在水平井的生产层的油饱和部分中钻出水平井眼，将管柱下放到井中，使用水力压裂法在地层中形成射孔和裂缝的方法。从远离垂直井眼轴线的一端开始，依次钻出水平井的井眼。在下一次水力压裂过程中，利用封隔器将进行水力压裂的部分与管柱的另一部分隔离。在水平井钻孔过程中，确定岩石的渗透率和孔隙率，并确定低渗透率和岩石孔隙度的生产地层的间隔，并在完成钻探后，确定水平井眼各间隔中的岩石水力压裂压力。然后确定渗透率和孔隙率低的地层的油饱和部分的每个间隔的压裂液和酸的体积，然后将管柱移动到最靠近井底，渗透率低的生产地层的间隔。气孔，机械式封隔器就位，使用泵送装置从孔口将胶凝的压裂液通过喷水工具的喷嘴注入管柱并重整穿孔，然后，不停止将胶凝的压裂液注入管柱，构造裂缝压力，该裂缝压力适用于生产地层中油饱和部分的给定间隔。在管柱中的胶凝压裂液注入压力下降30％之后，形成了水力压裂裂缝，为此目的，以可变的流量将酸注入井的环形空间，从而确保维持胶凝压裂注入的压力。对于给定的采出油饱和度区间，管柱中的流体比断裂压力小10％。进行封隔器释放，并将管柱从井底移至井口，然后进入具有低渗透性和低岩石孔隙度的地层中油饱和部分的以下区域，以形成射孔并随着地层的形成和进行进行地层的水力压裂效果：缩短地层水力压裂的时间，提高地层水力压裂的性能和可靠性。3 dwg

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公开/公告号RU2537719C1

专利类型
公开/公告日2015-01-10

原文格式PDF
申请/专利权人 OTKRYTOE AKTSIONERNOE OBSHCHESTVO TATNEFT IMENI V.D. SHASHINA;
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申请/专利号RU20130148289
发明设计人 ZIJATDINOV RADIK ZJAUZJATOVICH;RAKHMANOV RAFKAT MAZITOVICH;SALIMOV OLEG VJACHESLAVOVICH;ISMAGILOV FANZAT ZAVDATOVICH;GARIFOV KAMIL MANSUROVICH;
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申请日2013-10-29
分类号E21B43/267;E21B43/27;E21B43/114;
国家 RU
入库时间 2022-08-21 14:56:37

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