| Yingtai oilfield has 100 million tons of oil and gas resources, abundant, but difficult to exploit, at the moment,it is urgently needed to improve the integrated development of the effect on the mining capacity to solve problems, namely drilling deviation control problems.To solve this problem, it is the first and foremost to analyse the regional geology of Yingtai and basic information of previously drilled wells,based on that to research the influence factors of inclination, the formation factor and BHA and drilling parameters,in which BHA and drilling parameters is controllable factors, so to research and optimize the controllable factors.Analyzed the deviation control measures and the characterrics of drilling parameters about 42 wells by collecting and arranging drilling data of 2010、2011、2012. The key is to analyze the bit selection and drilling parameters(bit weight and rotational speed).To find out favorable "deviation control and fast " 、drilling parameters and the basis of bit selection.Since 2010, the max proportion of yingtai oilfield has drilled deep wells is Φ228.6mm,so As an example,analyzed the application effect of Φ228.6mm deviation control and fast drilling assembly, to optimize the design of deviation control and fast drilling assembly and drilling parameters based on BHA simulation analysis Model and Drilling tendency Model:(1)The tapered drilling tool has inclination correction effect only at low bit weight, and the inclination correction effect weakened weakened gradually with the increase of weight on bit;(2) The laying position of the stabilizer is the key to design of the pendulum assembly;(3)Bit weight affect the “deviation control and straight” effect Of the flexiblependulum stem;(4) The curved drill guide can achieve “deviation control and straight” when rotating drilling in the straight section. Making that application for the practice of production to enhance recovery rate and to solve the problem of stimulation. |
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