【摘要】：長城鉆探自2005年參與蘇里格氣田合作開發(fā),致密砂巖氣藏開發(fā)技術(shù)日趨成熟,開發(fā)效果逐步提高。為提高工作效率,降低開發(fā)成本,長城鉆探在蘇53塊開展大平臺叢式井組工廠化作業(yè)項(xiàng)目。本文研究了蘇53區(qū)塊大平臺叢式井鉆井工程方案,基于工廠化鉆井施工模式制定了井場布置方案。采用了雙鉆機(jī)分兩排相向整拖施工方案,優(yōu)化設(shè)計(jì)了井場面積、井口間距、排間距等參數(shù)。在滿足地質(zhì)要求的前提下,優(yōu)化了井身結(jié)構(gòu)設(shè)計(jì)方案,優(yōu)化了各層套管的尺寸、下入深度以及完井管柱方案。制定了蘇53區(qū)塊叢式水平井眼軌跡設(shè)計(jì)原則,制定了兩套井眼軌跡方案并進(jìn)行了力學(xué)分析,最終優(yōu)選了軌跡設(shè)計(jì)方案。該方案采取“直-增-穩(wěn)-扭增-水平”剖面,根據(jù)偏移距從1250m左右定向,先以20°井斜穩(wěn)斜到3090m左右,最后以5°/30m曲率增井斜到目標(biāo)A點(diǎn)。優(yōu)化后井眼軌跡在很大程度上降低了扭方位幅度,使得現(xiàn)場實(shí)鉆軌跡與設(shè)計(jì)軌跡基本吻合。基于摩阻扭矩監(jiān)測技術(shù)進(jìn)行現(xiàn)場測試,確定了不同工況磨阻系數(shù)。結(jié)果表明,不同工況下套管內(nèi)摩阻系數(shù)稍有差異,但變化不大。套管摩阻系數(shù)在0.17~0.2之間,裸眼摩阻系數(shù)在0.23~0.25之間。基于該結(jié)構(gòu)可以在現(xiàn)場有目的性地取值摩阻系數(shù),進(jìn)而較準(zhǔn)確的預(yù)計(jì)和分析鉆具在井下的受力情況,達(dá)到指導(dǎo)施工隊(duì)伍合理選取鉆井參數(shù),鉆井液性能,優(yōu)化鉆具組合以及優(yōu)選鉆頭的目的。
[Abstract]:The Great Wall has been involved in the joint development of Sulige gas field since 2005. The development technology of tight sandstone gas reservoir has become more mature and the development effect has been improved gradually. In order to improve the working efficiency and reduce the development cost, the Great Wall drilling carried out a large platform cluster well group factory project in Su53 blocks. In this paper, the drilling project of large platform cluster well in Su53 block is studied, and the well site layout scheme is established based on the factory drilling mode. The dual drilling rig was used to design the parameters such as well site area, wellhead spacing, row spacing and so on. On the premise of satisfying the geological requirements, the design scheme of wellbore structure is optimized, and the size, depth and completion string of casing in each layer are optimized. The principle of trajectory design of cluster horizontal well in block Su53 is established, two sets of well trajectory schemes are worked out and mechanical analysis is carried out, and finally the trajectory design scheme is selected. According to the orientation of migration distance from 1250m to 3090m or so, the slope of 20 擄well is first inclined to 3090m or so, and finally, 5 擄/ 30m curvature is used to increase well inclination to target point A. The optimized borehole trajectory reduces the torsional azimuth amplitude to a great extent and makes the field drilling trajectory basically coincide with the designed trajectory. Based on the friction torque monitoring technology, the friction coefficient of different working conditions was determined. The results show that the friction coefficient of casing is slightly different under different operating conditions, but the change is not significant. The friction coefficient of casing is between 0.17g and 0.2, and that of naked eye is between 0.230.25. Based on this structure, the friction coefficient can be obtained purposefully in the field, and then the stress condition of the drill tool in the downhole can be predicted and analyzed accurately, so as to guide the construction team to select the drilling parameters reasonably and the drilling fluid performance. The purpose of optimizing drilling tool combination and selecting drill bit.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TE243
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本文編號：2285595