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公开(公告)号：US20240344412A1
公开(公告)日：2024-10-17
申请号：US18753570
申请日：2024-06-25
申请人： Opla Energy Ltd.
发明人： Elvin MAMMADOV , Shawn CODY , Ahmad ALIZADEH
CPC分类号： E21B21/082 , E21B21/16 , E21B47/06 , E21B37/00
摘要： A method for drilling a wellbore comprises using drilling mud having a mud weight less than the formation pore pressure while drilling the horizontal section, to release some formation gas to mix with the drilling mud. As the mixture flows up the wellbore annulus, the resulting pressure in the vertical section is within the mud weight window (MWW) of the weak zones, thereby maintaining wellbore stability without the need for intermediate casings. The wellbore is killed by introducing a volume of heavy mud via a circulation sub in the drill string and periodically introducing additional heavy mud to fill the void left behind by the drill string as it is pulled uphole. The ratio of light mud and heavy mud in the killed well is such that the resulting pressure in the vertical section is within the MWW of the weak zones.
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公开(公告)号：US20220003649A1
公开(公告)日：2022-01-06
申请号：US17365381
申请日：2021-07-01
申请人： Opla Energy Ltd.
IPC分类号： G01N11/08
摘要： A rheology device comprises an elongated body having a flow path defined therein, first and second pressure lines in communication with the first and second ends of the flow path, respectively, and a differential pressure sensor for measuring a difference in pressure between the first and second pressure lines. In embodiments, the pressure lines are filled with a spacer fluid different from the fluid in the flow path. Based on at least three measurements of difference in pressure and corresponding flow rates, a yield point, a consistency factor, and a power factor can be calculated, and a rheology model of the fluid can be generated. Related methods are described which allow fluid rheology models to be determined and updated frequently. The device and methods herein may be useful in oil and gas operations, for example for rheology and hydraulic modeling in drilling operations.
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公开(公告)号：US20210317714A1
公开(公告)日：2021-10-14
申请号：US17226763
申请日：2021-04-09
申请人： Opla Energy Ltd.
发明人： Elvin MAMMADOV , Shawn CODY , Ahmad ALIZADEH
摘要： A method for drilling a wellbore comprises using drilling mud having a mud weight less than the formation pore pressure while drilling the horizontal section, to release some formation gas to mix with the drilling mud. As the mixture flows up the wellbore annulus, the resulting pressure in the vertical section is within the mud weight window (MWW) of the weak zones, thereby maintaining wellbore stability without the need for intermediate casings. The wellbore is killed by introducing a volume of heavy mud via a circulation sub in the drill string and periodically introducing additional heavy mud to fill the void left behind by the drill string as it is pulled uphole. The ratio of light mud and heavy mud in the killed well is such that the resulting pressure in the vertical section is within the MWW of the weak zones.
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