High-temperature shale gas long horizontal well drilling temperature control system and method
A technology of long horizontal well and temperature control system, which is applied in the direction of wellbore/well components, earthwork drilling, flushing wellbore, etc. It can solve the problems of reducing the drilling fluid bottom hole circulation temperature, etc., and achieve the reduction of tripping and replacement of drilling rigs. It has the effects of combining time, high thermal conductivity of the medium, and preventing abnormal signals
Pending Publication Date: 2022-07-01
BC P INC CHINA NAT PETROLEUM CORP +1
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However, through the calculation results of relevant theoretical models and field data, it is found that the method of reducing the temperature of the drilling fluid entering the well by the surface cooling device can only partially reduce the bottomhole circulation temperature of the drilling fluid, and the drilling parameters need to be optimized to achieve further downhole temperature control Methods
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[0041] In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein can be arranged and designed in a variety of different configurations.
[0042] Please refer to figure 1 , the first embodiment of the present invention provides a high temperature shale gas long horizontal well drilling temperature control system, figure 2 The wellbore trajectory in is used as the calculated standard trajectory, and the temperature is controlled according to steps 1 to 8 of the content of the invention. figure 1...
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The invention discloses a drilling temperature control system and method for a high-temperature shale gas long horizontal well, and belongs to the technical field of drilling engineering. The system comprises a drilling tool assembly, a ground cooling device, a top drive, a slurry pump, solid control equipment and the like. The drilling tool assembly comprises a rotary guiding tool, a screw motor and a drilling rod. Meanwhile, the invention further discloses a drilling temperature control method for the high-temperature shale gas long horizontal well. According to the method, the drilling fluid bottom hole circulation temperature is simulated by adopting theoretical analysis and combining field test data fitting and other methods, and the conditions of different parameters on the drilling fluid bottom hole circulation temperature are simulated and observed by adjusting the drilling fluid density, the slurry pump displacement, the drilling tool combination, the number of revolutions of the drilling tool combination and the like. And a reference basis is provided for optimization of construction parameters of a deep high-temperature drilling site.
Description
technical field [0001] The invention relates to the technical field of drilling engineering, in particular to a temperature control system and method for drilling a high temperature shale gas long horizontal well. Background technique [0002] The Luzhou block is located in the Yanggaosi tectonic group in the low-fold belt in southern Sichuan. The stratigraphy and Quaternary strata. The target layer is the Silurian Longmaxi Formation, with a vertical depth of 3500-4300m. The geothermal gradient of the Luzhou block, which represents the terrestrial heat flow, is about 3°C / 100m. Heat is the most direct reflection of the energy balance of various dynamic processes in the earth on the surface. The value of terrestrial heat flow is equal to the product of the geothermal gradient and the thermal conductivity of the formation. The measured electrical data show that the formation temperature of Longmaxi is about 128~ 145°C. The formation of Longmaxi Formation is drilled with oil-...
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IPC IPC(8): E21B21/08E21B21/00E21B47/00E21B47/07G06F30/20G06Q50/02
CPCE21B21/08E21B21/00E21B47/00E21B47/07G06Q50/02G06F30/20
Inventor 冯明杨恒林王元付利郭凯杰陈刚
Owner BC P INC CHINA NAT PETROLEUM CORP