水平井水力喷射分段压裂工艺研究
发布时间：2018-12-12 06:52
【摘要】：近年来,随着油气田开采工作的不断深入,储层中难开采的低渗透原油所占的比例越来越大,水平井技术和水力压裂技术是^u采低渗透原油的重要手段。水平井是一项前景广泛的采油技术,在国内油气田中得到越来越广泛的应用。而在低渗透油气田,多数水平井的产能未达到预期目标,需要实施分段压裂来提高水平井产能。水力喷射压裂技术,是集水力喷砂射孔、水力压裂、隔离一体化的新型增产改造技术,无需机械封隔,可实现准确的定点喷射,一套工具多段压裂,是实现水平井的压裂改造的关键技术。本文以水力喷射压裂技术为依托,以低渗透储层水平井为研究对象。在调研国内外水平井水力喷射压裂技术文献的基础上,通过对水平井水力喷射分段压裂机理研宄、分析计算和现场试验主要得到了以下成果:(1)完善了水力喷射压裂技术在喷砂射孔方面的机理,并对相关影响参数进行了分析。(2)对水力喷射分段压裂工艺相关参数建立了计算模型,进行了计算分析。(3)开展了水力喷射压裂水力参数计算和优化研宄,建立了不同油管与套管环空及油管内流体摩阻压降损失计算模型,模型与实际吻合程度较高,计算简便、高效。(4)通过分析总结前期水力喷射分层压裂的应用情况,对该工艺的适应性与局限性有了深入的认识,从而确保工艺的成功实施。(5)本论文对水平井水力喷射分段压裂进行了施工参数优化,并对施工情况进行了应用总结,验证了优化效果。本文^u展的水力喷射分层压裂技术的系统研究,为水力喷射压裂设计提供了理论依据,可以有效提高水力喷砂分层压裂的施工效率和应用效果,具有广阔的推广运用前景,对提高低渗透油气藏增产改造效果具有指导意义。本文以苏里格气田苏10区块S10-31-48H井为例,在其压裂改造施工中,对该井进行水力喷射分段压裂技术工艺改造,利用本文的参数优化计算了加砂量、排量,并经现场应用,在增产方面取得很好的效果。
[Abstract]:In recent years, with the continuous development of oil and gas fields, the proportion of low permeability crude oil which is difficult to exploit in reservoir is increasing. Horizontal well technology and hydraulic fracturing technology are important means of producing low permeability crude oil. Horizontal well is a promising oil recovery technology, which is more and more widely used in domestic oil and gas fields. In low permeability oil and gas fields, the productivity of most horizontal wells is not up to the expected target, and it is necessary to implement piecewise fracturing to improve the productivity of horizontal wells. Hydraulic jet fracturing technology is a new technology of increasing production, which integrates hydraulic sand blasting perforation, hydraulic fracturing and isolation. It can realize accurate fixed-point injection without mechanical sealing, and a set of tools for multi-stage fracturing. It is the key technology to realize the fracturing reformation of horizontal well. Based on hydraulic jet fracturing technology, this paper takes horizontal well of low permeability reservoir as research object. Based on the investigation of domestic and international literature on hydraulic injection fracturing technology in horizontal wells, the mechanism of hydraulic injection fracturing in horizontal wells is studied. The main results of analysis and field test are as follows: (1) the mechanism of sand blasting perforation by hydraulic jet fracturing technology is improved. The related parameters are analyzed. (2) the calculation model of hydraulic injection fracturing parameters is established and analyzed. (3) hydraulic parameters calculation and optimization research are carried out. The calculation models of frictional pressure drop of different tubing and casing annulus and fluid in tubing are established. The model is in good agreement with the actual situation, and the calculation is simple and efficient. (4) by analyzing and summarizing the application of early stage hydraulic jet stratified fracturing, In order to ensure the successful implementation of the process, the adaptability and limitation of the process are deeply understood. (5) the paper optimizes the operation parameters of the horizontal well hydraulic injection fracturing, and summarizes the application of the process. The optimization effect is verified. The systematic study of hydraulic jet stratified fracturing technology in this paper provides a theoretical basis for the design of hydraulic jet fracturing, which can effectively improve the operation efficiency and application effect of hydraulic sand blasting stratified fracturing, and has a broad prospect of popularization and application. It is of guiding significance for improving the effect of increasing production and reforming low permeability reservoirs. Taking S10-31-48H well in Su10 block of Sulige gas field as an example, the hydraulic injection fracturing technology has been carried out in the fracturing reconstruction of the well. The sand addition and discharge volume have been optimized and calculated by using the parameters in this paper, and it has been applied in the field. Good results have been achieved in increasing production.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357.1
[Abstract]:In recent years, with the continuous development of oil and gas fields, the proportion of low permeability crude oil which is difficult to exploit in reservoir is increasing. Horizontal well technology and hydraulic fracturing technology are important means of producing low permeability crude oil. Horizontal well is a promising oil recovery technology, which is more and more widely used in domestic oil and gas fields. In low permeability oil and gas fields, the productivity of most horizontal wells is not up to the expected target, and it is necessary to implement piecewise fracturing to improve the productivity of horizontal wells. Hydraulic jet fracturing technology is a new technology of increasing production, which integrates hydraulic sand blasting perforation, hydraulic fracturing and isolation. It can realize accurate fixed-point injection without mechanical sealing, and a set of tools for multi-stage fracturing. It is the key technology to realize the fracturing reformation of horizontal well. Based on hydraulic jet fracturing technology, this paper takes horizontal well of low permeability reservoir as research object. Based on the investigation of domestic and international literature on hydraulic injection fracturing technology in horizontal wells, the mechanism of hydraulic injection fracturing in horizontal wells is studied. The main results of analysis and field test are as follows: (1) the mechanism of sand blasting perforation by hydraulic jet fracturing technology is improved. The related parameters are analyzed. (2) the calculation model of hydraulic injection fracturing parameters is established and analyzed. (3) hydraulic parameters calculation and optimization research are carried out. The calculation models of frictional pressure drop of different tubing and casing annulus and fluid in tubing are established. The model is in good agreement with the actual situation, and the calculation is simple and efficient. (4) by analyzing and summarizing the application of early stage hydraulic jet stratified fracturing, In order to ensure the successful implementation of the process, the adaptability and limitation of the process are deeply understood. (5) the paper optimizes the operation parameters of the horizontal well hydraulic injection fracturing, and summarizes the application of the process. The optimization effect is verified. The systematic study of hydraulic jet stratified fracturing technology in this paper provides a theoretical basis for the design of hydraulic jet fracturing, which can effectively improve the operation efficiency and application effect of hydraulic sand blasting stratified fracturing, and has a broad prospect of popularization and application. It is of guiding significance for improving the effect of increasing production and reforming low permeability reservoirs. Taking S10-31-48H well in Su10 block of Sulige gas field as an example, the hydraulic injection fracturing technology has been carried out in the fracturing reconstruction of the well. The sand addition and discharge volume have been optimized and calculated by using the parameters in this paper, and it has been applied in the field. Good results have been achieved in increasing production.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357.1
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