莫里青西北缘深井防斜打直钻井技术研究

发布时间：2018-06-24 12:41

本文选题：井斜 + 钻具组合　；参考：《东北石油大学》2015年硕士论文

【摘要】：伊通盆地具有6.5亿吨油气资源,储量丰富,但由于莫里青断陷储集层具有地层倾角大,储层埋藏深度大(2250-3000米)、地下高温、高压等特殊性,导致钻井质量较差,出现卡钻、掉块、井斜等突出工程问题。为了提高钻井速度和井身质量,需要进行配套的钻井工程技术攻关,解决该区钻井中的问题,达到安全、优质及快速钻井的目的。本文首先根据莫里青油田地层分层情况,统计分析各段地层的平均井斜角、下部井段的水平位移、平移方位角以及平均机械钻速,得到了该区块井斜规律,深入分析了该区块井斜原因。立足于莫里青西北缘深井防斜打直技术需要,采用纵横弯曲法作为求解BHA力学问题的理论基础,开展钻具组合受力分析与计算,建立了常规钻具组合力学特性分析模型和导向钻具组合旋转钻进特性分析模型。分析钻头与地层的相互作用,得到了钻进方向与所钻地层、井眼几何、所用钻头及其力学特性之间的内在联系,提出了钻进趋势判别指标和钻进趋势预测方法,得到了钻具组合的实际使用效果的验证方法。以建立的BHA受力分析模型和钻进趋势预测模型为基础,分别对Φ311.1mm井眼塔式钻具、钟摆钻具、柔性钟摆钻具组合以及Φ215.9mm井眼普通防斜打直钻具组合和导向钻具组合的使用效果进行分析,最终优化钻具组合设计、优选钻井参数,得到一套防斜打直技术方案的设计方法。通过此研究,在工程效益方面,为防止直井段出现井斜、提高钻井质量提供技术指导,在经济效益方面,有利于减少在下钻过程中对钻具的损伤,从而节约钻井成本。因此,进行本研究对于解决当前深井钻井过程中的遇到的一些难题,不仅具有理论价值,也具有重大的应用价值和实际意义。
[Abstract]:Yitong Basin has 6.5 million tons of oil and gas resources, rich in reserves, but because the Mori Qing fault depression reservoir has a large dip angle, deep buried depth (2250-3000 meters), underground high temperature, high pressure and other particularity, resulting in poor drilling quality, drilling, falling block, well deviation and other sudden outburst engineering problems. In order to improve drilling speed and well quality, it is necessary to improve the drilling speed and well body quality. In order to solve the problems in drilling in this area and achieve the purpose of safety, quality and rapid drilling, according to the stratigraphic stratification situation in the Mori Qing oilfield, this paper analyzes the average well slope angle of each section, the horizontal displacement of the lower section, the shift azimuth and the average mechanical drilling speed, and the well deviation of the block is obtained. The reason of the well deviation in the block is deeply analyzed. Based on the requirement of the deep well prevention and straightening of deep wells in the northwestern border of Mori Qing, the longitudinal and horizontal bending method is used as the theoretical basis for solving the BHA mechanics problem, and the analysis and calculation of the force of the drill assembly are carried out. The analysis model of the mechanical properties of the assembly of the conventional drilling tools and the characteristics of the rotary drilling characteristics of the combination of the drilling tools are set up. The interaction between the drill and the formation is analyzed. The internal relations between the drilling direction and the drilling formation, the borehole geometry, the drill bit and its mechanical characteristics are obtained. The drilling trend discriminant index and the drilling trend prediction method are put forward, and the verification method of the actual effect of the drilling tool combination is obtained. The BHA stress analysis model is established. On the basis of the model and drilling trend prediction model, the application effects of the drilling tools, pendulum drilling tools, flexible pendulum drill tools, flexible pendulum drilling tools, and normal anti skew drilling tools and directional drilling tools of 215.9mm wells are analyzed respectively. Finally, the design of drilling tools is optimized and drilling parameters are optimized, and a set of anti skew straightening technology is obtained. Through this study, in terms of engineering benefits, it provides technical guidance for preventing straight well section from occurrence of well deviation and improving drilling quality. In terms of economic benefits, it is beneficial to reduce the damage to drilling tools during the drilling process and thus save drilling cost. Therefore, this study has been carried out to solve the problems encountered in the current well drilling process. Some problems not only have theoretical value, but also have great practical value and practical significance.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE242

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