發(fā)布時間：2019-02-15 10:56

【摘要】：這幾年,隨著一般油氣藏的改造及非常規(guī)油氣藏開發(fā)需求的增加,連續(xù)油管鉆磨橋塞鉆磨參數(shù)的優(yōu)化問題得到了廣泛的研究。連續(xù)油管具有高強度、高韌性特點,與傳統(tǒng)油管作業(yè)相比,作業(yè)周期短、工作效率高、運輸方便,特別是在特殊井下工況作業(yè)時優(yōu)點明顯。鉆速方程和磨損方程的分析和參數(shù)優(yōu)化為連續(xù)油管下入深度、施加鉆壓、輸送介質排量的分析和評價提供理論依據(jù),確保連續(xù)油管各種井下作業(yè)安全可靠。本文選取連續(xù)油管鉆磨橋塞為研究對象,基于切削原理和彈塑性力學,針對鉆頭及橋塞整體空間結構,對復合橋塞專用鉆頭鉆磨復合橋塞的過程進行了受力分析,并進行了仿真計算,得出了橋塞在鉆壓及扭矩作用下的數(shù)值分析結果;考慮鉆壓、鉆速、橋塞特性、水力因素及螺桿鉆具的磨損等主要影響因素,建立了具體的鉆速方程和鉆頭磨損方程;在鉆磨單個橋塞的情況下,由于現(xiàn)場鉆磨橋塞施工中的各種因素的限制,鉆壓和排量是鉆進速度的主要可控變量,針對這一現(xiàn)狀分析了鉆壓和排量對鉆速的影響;在分層作業(yè)中,需要一趟管柱鉆磨多個橋塞,在該工況下,分析了鉆壓與鉆磨時間、排量與鉆磨時間、鉆壓與最大鉆塞長度之間的關系,從而確定了多塞鉆磨鉆壓與排量的優(yōu)選方法。根據(jù)鉆磨橋塞參數(shù)優(yōu)化分析的需要,對橋塞主要結構材料進行了力學性能測試,試驗對象為橋塞的主要支撐結構材料,以壓縮試驗和扭轉試驗為主,確定了磨損方程中的不同工況下的單塞及單趟管柱鉆磨參數(shù)優(yōu)化,得出了不同狀態(tài)下的鉆磨時間和極限鉆磨深度。
[Abstract]:In the past few years, with the improvement of the general oil and gas reservoir and the increase of the development demand of unconventional oil and gas reservoirs, the optimization of the drilling and grinding parameters of the continuous tubing drilling and grinding bridge is widely studied. the continuous oil pipe has the characteristics of high strength and high toughness, the operation period is short, the working efficiency is high and the transportation is convenient compared with the conventional oil pipe operation, and the continuous oil pipe has the advantages of obvious advantages in special underground working conditions. The analysis and parameters of the drilling speed equation and the wear equation are optimized to provide a theoretical basis for the analysis and evaluation of the depth of the oil in the continuous oil pipe, the application of the drilling pressure and the displacement of the conveying medium, and the safety and reliability of various underground operations of the continuous oil pipe are ensured. Based on the cutting principle and the elastic-plastic mechanics, the force analysis of the composite bridge plug is carried out based on the cutting principle and the elastic-plastic mechanics, and the simulation calculation is carried out. The numerical results of the bridge plug under the action of drilling pressure and torque are obtained. The main factors such as the drilling pressure, the drilling speed, the characteristics of the bridge plug, the hydraulic factors and the wear of the screw drilling tool are considered, and the specific drilling speed equation and the bit wear equation are established; in the case of a single bridge plug for drilling, Due to the limitation of various factors in the construction of the on-site drilling and grinding bridge plug, the drilling pressure and the displacement are the main controllable variable of the drilling speed, and the influence of the drilling pressure and the displacement on the drilling speed is analyzed for the present condition; in the layered operation, a plurality of bridge plugs are required to be drilled through a pipe column, The relationship between the drilling pressure and the drilling time, the displacement and the drilling time, the drilling pressure and the length of the maximum drilling plug is analyzed, and the preferred method for the pressure and displacement of the multi-plug drill is determined. According to the need of the optimization and analysis of the parameters of the bridge plug, the main structural materials of the bridge plug are tested. The test object is the main supporting structure of the bridge plug, and the compression test and the torsion test are the main materials. The drilling and grinding parameters of single-plug and single-pass pipe under different working conditions in the wear equation are optimized, and the drilling time and the limit drilling depth under different conditions are obtained.
【學位授予單位】：東北石油大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TE921

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