【摘要】：近年來,隨著油氣田開采工作的不斷深入,儲(chǔ)層中難開采的低滲透原油所占的比例越來越大,水平井技術(shù)和水力壓裂技術(shù)是^u采低滲透原油的重要手段。水平井是一項(xiàng)前景廣泛的采油技術(shù),在國內(nèi)油氣田中得到越來越廣泛的應(yīng)用。而在低滲透油氣田,多數(shù)水平井的產(chǎn)能未達(dá)到預(yù)期目標(biāo),需要實(shí)施分段壓裂來提高水平井產(chǎn)能。水力噴射壓裂技術(shù),是集水力噴砂射孔、水力壓裂、隔離一體化的新型增產(chǎn)改造技術(shù),無需機(jī)械封隔,可實(shí)現(xiàn)準(zhǔn)確的定點(diǎn)噴射,一套工具多段壓裂,是實(shí)現(xiàn)水平井的壓裂改造的關(guān)鍵技術(shù)。本文以水力噴射壓裂技術(shù)為依托,以低滲透儲(chǔ)層水平井為研究對象。在調(diào)研國內(nèi)外水平井水力噴射壓裂技術(shù)文獻(xiàn)的基礎(chǔ)上,通過對水平井水力噴射分段壓裂機(jī)理研宄、分析計(jì)算和現(xiàn)場試驗(yàn)主要得到了以下成果:(1)完善了水力噴射壓裂技術(shù)在噴砂射孔方面的機(jī)理,并對相關(guān)影響參數(shù)進(jìn)行了分析。(2)對水力噴射分段壓裂工藝相關(guān)參數(shù)建立了計(jì)算模型,進(jìn)行了計(jì)算分析。(3)開展了水力噴射壓裂水力參數(shù)計(jì)算和優(yōu)化研宄,建立了不同油管與套管環(huán)空及油管內(nèi)流體摩阻壓降損失計(jì)算模型,模型與實(shí)際吻合程度較高,計(jì)算簡便、高效。(4)通過分析總結(jié)前期水力噴射分層壓裂的應(yīng)用情況,對該工藝的適應(yīng)性與局限性有了深入的認(rèn)識(shí),從而確保工藝的成功實(shí)施。(5)本論文對水平井水力噴射分段壓裂進(jìn)行了施工參數(shù)優(yōu)化,并對施工情況進(jìn)行了應(yīng)用總結(jié),驗(yàn)證了優(yōu)化效果。本文^u展的水力噴射分層壓裂技術(shù)的系統(tǒng)研究,為水力噴射壓裂設(shè)計(jì)提供了理論依據(jù),可以有效提高水力噴砂分層壓裂的施工效率和應(yīng)用效果,具有廣闊的推廣運(yùn)用前景,對提高低滲透油氣藏增產(chǎn)改造效果具有指導(dǎo)意義。本文以蘇里格氣田蘇10區(qū)塊S10-31-48H井為例,在其壓裂改造施工中,對該井進(jìn)行水力噴射分段壓裂技術(shù)工藝改造,利用本文的參數(shù)優(yōu)化計(jì)算了加砂量、排量,并經(jīng)現(xiàn)場應(yīng)用,在增產(chǎn)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.
【學(xué)位授予單位】：西安石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE357.1

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本文編號：2374131