【作者】 黄海；

【导师】 高宝奎； 张文波；

【作者基本信息】 中国石油大学（北京） ， 石油与天然气工程（专业学位）， 2017， 硕士

【摘要】 在如今国际油价低迷的大背景以及玛湖油田地质情况复杂的情况下,油气勘探开发面临着投入成本大,技术要求高等问题,如果不能有效地减少单口井的生产成本,会造成许多区块不再具有经济开采的价值。玛18井区地层发育较为完整,地层底部以发育良好的砾石为主,下部地层可钻性差,严重影响了玛18井区勘探开发工作的进展。为实现玛18井区优快钻井技术,本文针对该井区特低渗油藏的特点,通过对三维地应力建模技术的研究,围绕低成本战略,开展了高效PDC钻头优选、钻井提速工具优选等方面的研究。主要研究内容如下:(1)三维地应力建模技术研究,以地震数据为基础,建立三维地质构造模型,结合单井地应力预测技术,建立玛18井区三维地应力模型,直观展示地应力、孔隙压力空间分布规律,为后期安全钻井提供依据。(2)岩石力学特性评价与钻头优选,通过对玛18井区连续岩石力学参数剖面和玛18井区钻头优选模型的建立,得到了玛18井区钻头优选结果并应用到现场,玛18井区二开井段13口井实现一趟钻,三开井段7口井实现一趟钻。(3)钻具组合优化研究,通过开展钻具组合敏感性分析,最终确定出了两套钻具组合方案,经现场应用取得了较好的效果。通过本文的研究,为玛18井区后期的勘探开发任务提供了全面的理论指导和技术支持。更多还原

【Abstract】 In the background of the current international oil price downturn and the complicated geological conditions in Mahu oil field.There are many problems such as high cost and high technical requirements in the process of oil and gas exploration and development,many blocks will no longer have the value of economic exploitation if we can’t effectively reduce the production single well cost.The formation of Ma18 block and the gravel at the bottom is well developed,The poor formation drillability leads to low drilling speed,long drilling cycle and high drilling cost.Based on the research of the 3D geostress modeling technology,this paper studies the optimization of the high efficiency PDC bit and the optimization of the drilling tool according to the characteristics of extra low permeability reservoir in order to realize the Ma 18 block of optimal and fast drilling,The main research contents are as follows:(1)3D geostress modeling technology.The establishment of 3D geological structure of the model based on seismic data,combined with the single well of the ground stress prediction technology,The 3D geostress model of the Ma 18 well is established,Intuitive display of ground stress and pore pressure of the spatial distribution of the law,For the future of safe drilling to provide the basis(2)Evaluation of rock mechanical properties and bit optimization.The profile of the parameters of the continuous rock mechanics of the Ma 18 well is established,and the establishment of the preferred model of the drill bit in the Ma 18 well area,this paper has obtained the best results of the drill bit in the Ma 18 well area,and applied to the scene,Ma 18 wells in the second drilling of the well section of a total of 13 wells to achieve a trip from the drill,a total of seven wells were drilled for the third time.(3)Optimization of BHA.Through the analysis of the sensitivity of the drilling tool combination,the final set of two sets of drilling tool combination program,after field application,and achieved good results.The research of this paper provides a comprehensive theoretical guidance and technical support for the exploration and development of Ma 18 block.更多还原