辽河油田稠油热采并侧钻技术研究和应用

发布时间：2018-12-13 20:02

【摘要】：辽河油田的大部分油藏为稠油油藏,地层胶结疏松。经过近30年的勘探开发,油田生产已进入中后期,增储、稳产形势十分严峻。如何提高采收率、增加原油产量、降低开采成本成为稠油开发过程中面临的艰巨任务之一,而稠油热采井侧钻技术因具有提高稠油油藏采收率、降低开采成本等优点,已经越来越受油公司的欢迎。本文主要对侧钻技术进行了详细分析与研究,结合理论研究与现场应用,优选出一套适合老油区稠油热采井开采的侧钻技术。解决辽河油田在开发后期增产、稳产难的难题,并对侧钻井技术在稠油油藏发挥的经济效益进行评估。论文的主要研究内容及研究成果如下:1、优化侧钻井井眼轨迹设计,综合分析工具造斜能力、开窗方式,分析原井套管完好情况、地层岩性、油水层纵向分布状况、地质要求等因素。优化钻具组合、钻井液体系、钻井参数,通过井眼轨迹控制在满足地质要求的前提下,尽可能多的利用老井套管、减少裸眼进尺、缩短钻井周期、节约钻井成本、提高产量,保证钻井施工安全。2、通过对造成侧钻井寿命短的主要原因进行了分析,探讨延长侧钻井寿命的主要工艺措施,明确了实施侧钻井扩孔工艺技术的重要性,并对侧钻井扩孔过程中存在的一些技术问题进行了探讨。利用分支井开采技术,挖掘厚层底水驱油藏及低渗薄层的剩余油潜力,防止底水锥进。通过对侧钻井配套技术应用实例的分析,采用加密调整方案挖掘剩余油潜力。改善油藏开发效果,起到降低成本,增加产量的目的。3、针对影响侧钻井固井质量因素分析,通过对微膨胀、低失水的水泥浆体系进行试验和对比,优选出FS-I防气窜降失水剂,研制侧钻井固井配套工具,优化完善侧钻井完井作业流程,提高侧钻井完井固井质量。4、分析辽河油田历年完钻侧钻井、侧钻水平井统计数据,对侧钻井技术在稠油油藏发挥的经济效益进行评估,与钻进同等进尺的调整井、更新井相比,节约工程投资12.20亿元。
[Abstract]:Most of the reservoirs in Liaohe Oilfield are heavy oil reservoirs with loose cementation. After nearly 30 years of exploration and development, oilfield production has entered the middle and late stage, increasing reservoir, stable production situation is very serious. How to increase recovery factor, increase crude oil production and reduce production cost has become one of the arduous tasks in heavy oil development process. However, side drilling technology of thermal recovery wells for heavy oil has the advantages of improving recovery efficiency and reducing production cost of heavy oil reservoir. It has become increasingly popular with oil companies. In this paper, the side drilling technology is analyzed and studied in detail. Combining with theoretical research and field application, a set of side drilling technology suitable for thermal recovery of heavy oil in old oil area is selected. To solve the problem of increasing production and stable production in Liaohe Oilfield in the later stage of development, and to evaluate the economic benefit of side drilling technology in heavy oil reservoir. The main research contents and results of this paper are as follows: 1. Optimizing the trajectory design of sidetracking well, synthetically analyzing the slanting ability of the tool, opening the window, analyzing the intact condition of the casing, the lithology of the formation, and the longitudinal distribution of the oil-water layer. Geological requirements and other factors Optimizing drilling tool combination, drilling fluid system, drilling parameters, making use of old casing as much as possible under the premise of satisfying geological requirements, reducing open hole feeding, shortening drilling cycle, saving drilling cost and increasing production. 2. Through the analysis of the main causes of the short side drilling life, the main technological measures for prolonging the side drilling life are discussed, and the importance of implementing the side drilling reaming technology is made clear. Some technical problems in the process of sidetracking and reaming are also discussed. In order to prevent bottom water coning, the residual oil potential of thick layer bottom water drive reservoir and low permeability thin layer is excavated by using branch well production technology. Based on the analysis of the application of side drilling matching technology, the infilling adjustment scheme is adopted to exploit the potential of remaining oil. The purpose of improving reservoir development effect is to reduce the cost and increase production. 3. According to the analysis of factors affecting cementing quality of side drilling, the cement slurry system with micro expansion and low water loss is tested and compared. The FS-I gas channeling and water loss control agent is selected, and a side drilling cementing tool is developed to optimize and perfect the sidetrack drilling and completion operation process and improve the cementing quality of the sidetrack drilling and completion. 4. The paper analyzes the completion of sidetracking drilling in Liaohe Oilfield over the years. The statistical data of sidetracking horizontal wells and the evaluation of the economic benefits of lateral drilling technology in heavy oil reservoirs are compared with those in the adjustment wells and renewal wells with the same ruler, and the engineering investment is saved by 1.22 billion yuan.
【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】：TE24;TE345

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