【摘要】：長慶油田油區(qū)地質(zhì)構(gòu)造復(fù)雜、薄油層多、單井產(chǎn)能較低且中小型邊際油氣田較多。寧定區(qū)域位于鄂爾多斯盆地的中西部,是長慶油田水平井規(guī)�；_采的區(qū)塊之一,開發(fā)目的層為長4+5、長6和長7地層。隨著寧定區(qū)域水平井的全面開發(fā),鉆頭造斜托壓嚴(yán)重、目的層段易垮塌、地層承壓能力低等難點制約著水平井提速的發(fā)展。為實現(xiàn)油田效益的最大化,提高單井產(chǎn)能、提高鉆井速度、縮短鉆井周期、降低單井成本成為油田開發(fā)的首要任務(wù)。本文主要從長慶油田寧定區(qū)域水平井的施工現(xiàn)狀入手,認(rèn)真收集分析目前在該區(qū)域水平井施工過程中出現(xiàn)的諸多難題,并結(jié)合現(xiàn)場實際,對井身結(jié)構(gòu)、井身剖面、井眼軌跡、鉆具組合和鉆井液體系五個方面出發(fā)進行優(yōu)化設(shè)計,針對不同目的層水平井遇到的難點提出不同的優(yōu)化措施,特別從物理、化學(xué)方向?qū)Α半p石層”的坍塌機理進行研究,分井段進行鉆井液體系的優(yōu)化。通過現(xiàn)場實施分析作業(yè)效果,得出了適用于該區(qū)域的水平井優(yōu)快鉆進的技術(shù)及配套方案。長慶油田寧定區(qū)域水平井鉆井安全快速鉆井技術(shù)的研究,在提高鉆進速度、縮短鉆進周期、降低鉆井成本及加快油氣資源的勘探開發(fā)進程等方面具有較強的指導(dǎo)意義和使用價值,并具有廣闊的應(yīng)用前景,為該區(qū)水平井的高效開發(fā)提供了技術(shù)依據(jù)。
[Abstract]:The geological structure of Changqing Oilfield is complex, there are many thin reservoirs, the productivity of single well is low and there are many small and medium marginal oil and gas fields. Ningding area, located in the central and western part of Ordos Basin, is one of the blocks of horizontal well scale production in Changqing Oilfield. The target layer is Chang 45, Chang 6 and Chang 7. With the comprehensive development of horizontal wells in Ningding area, the development of horizontal wells is restricted by the difficulties such as serious oblique bearing pressure of bit, easy collapse of target section and low bearing capacity of formation. In order to maximize the benefit of oil field, improve the productivity of single well, improve the drilling speed, shorten the drilling cycle and reduce the cost of single well, it is the primary task of oil field development. This paper mainly starts with the present situation of horizontal well construction in Ningding area of Changqing Oilfield, carefully collects and analyzes many difficult problems in the construction process of horizontal well in this area at present, and combines the field practice with the wellbore structure, wellbore profile and wellbore trajectory. The optimal design of drilling tool assembly and drilling fluid system is carried out from five aspects, and different optimization measures are put forward according to the difficulties encountered by horizontal wells in different target layers, especially the collapse mechanism of "double stone layer" is studied from the physical and chemical direction. The drilling fluid system is optimized in well section. Through the field analysis of the operation effect, the technology and supporting scheme of horizontal well rapid drilling suitable for this area are obtained. The research on safe and rapid drilling technology of horizontal well drilling in Ningding area of Changqing Oilfield is in the process of increasing drilling speed and shortening drilling cycle. Reducing drilling cost and speeding up the process of exploration and development of oil and gas resources have strong guiding significance and application value, and have broad application prospects, which provides a technical basis for the efficient development of horizontal wells in this area.
【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】：TE243

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