超低渗浅层油藏水平井钻井技术难点与突破

发布时间：2018-01-06 09:02

本文关键词：超低渗浅层油藏水平井钻井技术难点与突破　出处：《中国石油勘探》2017年05期 　论文类型：期刊论文

【摘要】：针对延长东部油区低渗—超低渗储层埋深浅,地层压力低,常规井开发井多、低产、低效问题日益突出的难题,以及水平井开发受低温、低压、埋深因素干扰,建井难度高的问题,开展了浅层—超浅层大位移水平井钻完井配套技术研究与应用。创新水平井钻井压裂一体化理念,针对压裂后易形成水平缝的低压浅层油藏,采用"弓形"水平井设计方法,配合浅层缝网压裂技术,比常规水平井的水平段提高至少30%的动用水平,实现了低垂向应力储层的高效动用;采取井眼轨道与井身剖面协同优化设计,采用低成本钻井加压技术,配合下套管优化技术,提高钻柱轴向压力及传输效率,实现了多口高难度水平井的成功建井。为提高延长东部浅层超低渗油藏开发效果,提供了坚实的技术支撑,具有较高的经济效益和社会效益。
[Abstract]:Aiming at the problems of low permeability and super low permeability reservoir buried shallow, low formation pressure, many conventional wells, low production and low efficiency, the horizontal well development is interfered by low temperature, low pressure and buried depth factors. In order to solve the problem of high difficulty in well construction, the research and application of drilling and completion matching technology for shallow to ultra-shallow horizontal wells are carried out, and the idea of integration of drilling and fracturing in horizontal wells is innovated. Aiming at the low pressure shallow reservoir which is easy to form horizontal fracture after fracturing, adopting the design method of "bow" horizontal well and combining with the fracturing technique of shallow fracture network, the production level of horizontal section of conventional horizontal well is increased by at least 30%. The high efficiency production of low vertical stress reservoir is realized. In order to improve the axial pressure and transmission efficiency of drill string, the optimum design of borehole track and wellbore profile is carried out, and the low cost drilling pressurization technology is adopted to improve the axial pressure and transmission efficiency of drill string. The successful construction of many high difficulty horizontal wells has been realized, which provides a solid technical support for improving the development effect of the shallow ultra-low permeability reservoirs in the eastern part of the country, and has high economic and social benefits.
【作者单位】：延长油田股份有限公司;
【基金】：国家(863)计划重点项目“陆相页岩气水平井钻完井工艺技术攻关”(2013AA064501) 陕西延长石油(集团)有限责任公司科技攻关重点项目“延长西部水平井钻采工艺技术研究与应用”(ycsy2012ky-A-06)
【分类号】：TE243
【正文快照】： 鄂尔多斯盆地是中国第二大含油气盆地,是国家重要的油气战略基地,也是业界公认的资源贫瘠、难以经济有效开采的低品位油田[1-2]。延长油田开发区域位于鄂尔多斯盆地中部,2007年原油产量突破千万吨后,已连续10年实现千万吨以上开发,取得了重大的经济效益和社会效益,为国内低渗

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