钻井岩屑自动取样系统的研究

发布时间：2018-02-21 14:54

本文关键词： 钻井岩屑自动取样系统构成分离设备 PLC控制　出处：《西安石油大学》2017年硕士论文　论文类型：学位论文

【摘要】：钻井岩屑是指石油钻井过程中地下岩石被钻头破碎后,随钻井液被带到地面上的岩石碎块,钻井岩屑根据地形地层的不同,形态形状往往差距较大,由于可以直接反映井下状况,是地质录井中重要的地质资料。钻井岩屑根据颗粒大小分为泥岩、砂岩,泥岩成岩性差,易溶于水;钻井岩屑颗粒直径分布在0.16mm-8mm之间,对于一般取样泵会造成磨损;目前常用的分离设备入钻井液振动筛其筛网寿命一般在10-40天,难以满足录井自动化的要求,所以,长期以来国内外采用人工捞取的方法,工作强度大,效率低,已无法满足快速钻井的需求,影响录井行业自动化的发展。为了实现录井自动化,根据钻井岩屑全自动清洗设备研制项目的要求,通过钻井岩屑自动取样系统关键技术的理论分析和计算,研制了钻井岩屑自动取样系统。该系统主要由取样泵、钻井岩屑固液分离设备、回用泵组成,其特点是采用机动方式从高架槽中抽取含有岩屑的钻井液,采用专利技术的分离设备分离后,钻井液返回泥浆池循环使用,设备可靠性强,得到的岩屑易清洗,岩屑的代表性强,反映的地质剖面连贯性强;系统与录井平台系统对接,实现闭环控制,满足了自动化录井岩屑对颗粒直径和重量的要求。本系统于2016年7月在青海油田狮45井、东德3井进行试验验证,性能指标达到设计要求,具有一定的实用价值。
[Abstract]:Drilling cuttings refer to rock fragments which are brought to the ground with drilling fluid after the underground rock is broken by bit in the course of oil drilling. According to the different topography and formation, the shape and shape of drilling cuttings are often quite different. Because it can directly reflect the downhole condition, it is an important geological data in geological logging. Drilling cuttings can be divided into mudstone, sandstone, mudstone and easily soluble in water according to grain size, and the diameter of drilling cuttings is between 0.16mm-8mm. For the general sampling pump will cause wear and tear; at present, the commonly used separation equipment enters the drilling fluid vibrating screen its screen life is generally 10-40 days, it is difficult to meet the requirements of mud logging automation, so, for a long time, the method of manual extraction has been adopted at home and abroad for a long time. Because of its high working intensity and low efficiency, it can no longer meet the requirement of rapid drilling, which affects the development of logging automation. In order to realize logging automation, according to the requirements of the project of automatic cleaning equipment for drilling cuttings, Based on the theoretical analysis and calculation of the key technology of drilling cuttings automatic sampling system, a drilling cuttings automatic sampling system is developed. The system is mainly composed of sampling pump, drilling cuttings solid-liquid separation equipment and recycle pump. Its characteristic is that the drilling fluid containing cuttings is extracted from the viaduct in a mobile manner. After separation of the separation equipment with patent technology, the drilling fluid returns to the mud pool for recycling, and the equipment has strong reliability, and the resulting cuttings are easy to clean. The rock cuttings have strong representativeness and strong continuity of geological profile, and the system is connected with the mud logging platform system to realize closed loop control, The system was tested and verified in July 2016 in Shih 45 well, Qinghai Oilfield, East Germany well 3. The performance index reached the design requirements and has certain practical value.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE927

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