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Research on Underbalanced Drilling Technology Aiming for Drilling Rate-raising in Western Sichuan

Author: WangMaoLin
Tutor: JinYeQuan
School: China University of Petroleum
Course: Oil and Gas Well Engineering
Keywords: Underbalanced Liquid phase Wellbore stability Drilling rate equation Parameter optimization
CLC: TE242
Type: Master's thesis
Year: 2011
Downloads: 126
Quote: 0
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Abstract


Strata in western Sichuan dense rock drill poor , abnormal formation pressure , multi-pressure systems coexist , many gas complex relationship between gas and water , engineering geological characteristics due to the complexity , low penetration rate in the region , the underground complex and frequent accidents , well construction cycle is long, severely limits the progress of the exploration and development of the western Sichuan region . Liquid underbalanced drilling technology has obvious advantages in the ROP to reduce downhole , in the western Sichuan region to promote the use . The papers in the research the underbalanced drilling literature at home and abroad on the basis of statistics site in western Sichuan liquid due to the balance of the construction process of the complex case , summarized the contents of underbalanced drilling adaptability evaluation , combined with the relevant standards for underbalanced drilling and field implementation the drilling experience the underbalanced drilling adaptive evaluation process , and the main structure of western Sichuan Section hierarchy liquid underbalanced drilling technology adaptability analysis ; near wellbore formation fluid flow and the borehole wall rock temperature change will produce induced stress , which the borehole stress impact , affecting wellbore stability evaluation , this paper analyzes underbalanced conditions on temperature and formation fluid seepage wells circumferential stress as a basis for the establishment of a target speed of the liquid due to balanced drilling undervoltage value of design steps ; papers and live real drilling data , using regression method suitable for the western Sichuan liquids underbalanced drilling drilling rate equation and the single drill penetration rate with the cumulative variation footage , the introduction of the coefficient of the cost of drilling and drilling speed factor , considering the cost of drilling and drilling speed drilling parameters optimization model . Papers to the new 22 well , for example , the adaptive analysis , undervoltage design and drilling parameters optimization study , theoretical analysis result of the calculation and on-site construction compared to verify that the theory and the model correctly sex . The research results show that the paper on the design and construction of liquid underbalanced drilling technology has guiding significance , due to the improvement and promotion of balanced drilling technology helps in western Sichuan to speed target liquid .

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CLC: > Industrial Technology > Oil and gas industry > Drilling engineering > Drilling Technology > Drilling technology
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