本文選題：什邡氣田 + 蓬萊鎮(zhèn)組　； 參考：《成都理工大學(xué)》2015年碩士論文

【摘要】：什邡氣田蓬萊鎮(zhèn)組天然氣資源量巨大,具有廣闊的勘探開發(fā)前景。但由于地質(zhì)條件復(fù)雜,儲層非均質(zhì)性強(qiáng),泥頁巖易坍塌,且天然裂縫發(fā)育,導(dǎo)致一系列井下復(fù)雜問題的發(fā)生,嚴(yán)重影響了鉆井工程的進(jìn)度,制約了整個蓬萊鎮(zhèn)組氣藏勘探開發(fā)工作。因此,急需開展研究區(qū)目的層相關(guān)研究,為合理開發(fā)蓬萊鎮(zhèn)組氣藏提供科學(xué)的技術(shù)支持。本文以石油地質(zhì)學(xué)、構(gòu)造地質(zhì)學(xué)、地球物理測井、巖石力學(xué)與工程、油氣藏工程及鉆井工程的理論和方法為基礎(chǔ),在深化工區(qū)工程地質(zhì)特征認(rèn)識基礎(chǔ)上,結(jié)合前期研究成果,系統(tǒng)分析了巖石力學(xué)、地層孔隙壓力、地應(yīng)力、坍塌壓力、破裂壓力等參數(shù)及特征,對什邡氣田蓬萊鎮(zhèn)組井壁穩(wěn)定性特征進(jìn)行了綜合分析。論文在全面收集整理鉆井、測井、測試及儲層改造等相關(guān)資料的基礎(chǔ)上,通過實驗和地球物理測井資料相結(jié)合的辦法建立了巖石力學(xué)參數(shù)預(yù)測模型及剖面。利用Eaton法建立了地層孔隙壓力預(yù)測模型及剖面。利用工區(qū)周邊成像測井資料及微地震資料分析明確蓬萊鎮(zhèn)組最大水平地應(yīng)力方向為近東西向。在優(yōu)選井壁失穩(wěn)準(zhǔn)則基礎(chǔ)上,建立什邡氣田地層坍塌壓力、破裂壓力預(yù)測模型及相應(yīng)剖面,開展有針對性的井壁穩(wěn)定性分析,什邡地區(qū)坍塌壓力隨深度增加而增大,蓬萊鎮(zhèn)組及以上地層坍塌壓力均小于地層孔隙壓力,以地層孔隙壓力設(shè)計的鉆井液密度能夠維持井壁穩(wěn)定。破裂壓力在2.39~3.31MPa/100m之間,遠(yuǎn)高于地層坍塌壓力和地層孔隙壓力,基本上不存在鉆井液壓破地層發(fā)生漏失的情況。同時,結(jié)合分析所得數(shù)據(jù),提出適合工區(qū)的鉆井工藝技術(shù)對策,為鉆井工程設(shè)計及施工提供了基礎(chǔ)依據(jù)。論文取得的各項研究成果服務(wù)后續(xù)鉆完井工程作業(yè),將有效減少井下工程狀況,提高鉆井效率,縮短鉆井周期,降低鉆采成本,對實現(xiàn)什邡氣田蓬萊鎮(zhèn)組天然氣高效勘探開發(fā)具有重要的現(xiàn)實意義。
[Abstract]:The gas resource of Penglai Zhen formation in Shifang gas field is huge and has broad prospect of exploration and development. However, due to complex geological conditions, strong heterogeneity of reservoir, easy collapse of shale and development of natural fractures, a series of complex downhole problems occurred, which seriously affected the progress of drilling engineering. It restricts the exploration and development of the gas reservoir in Penglai Zhen formation. Therefore, it is urgent to carry out relevant research on target layer in the research area to provide scientific and technical support for the rational development of gas reservoirs in Penglai Zhen formation. This paper is based on the theories and methods of petroleum geology, tectonic geology, geophysical logging, rock mechanics and engineering, oil and gas reservoir engineering and drilling engineering. The parameters and characteristics of rock mechanics, formation pore pressure, ground stress, collapse pressure and fracture pressure are systematically analyzed, and the characteristics of wellbore stability of Penglai Zhen formation in Shifang gas field are comprehensively analyzed. On the basis of collecting and sorting relevant data such as drilling, logging, testing and reservoir modification, the prediction model and profile of rock mechanics parameters are established by combining experimental and geophysical logging data. The prediction model and profile of formation pore pressure are established by using Eaton method. The maximum horizontal geostress direction of Penglai Zhen formation is found to be near east-west direction through the analysis of peripheral imaging logging data and microseismic data. On the basis of the criteria of optimal selection of wellbore instability, the formation collapse pressure, fracture pressure prediction model and corresponding profile of Shifang gas field are established, and targeted wellbore stability analysis is carried out. The collapse pressure increases with the increase of depth in Shifang area. The formation collapse pressure of Penglai Zhen formation and above is smaller than that of formation pore pressure, and the density of drilling fluid designed by formation pore pressure can maintain the wellbore stability. The fracture pressure between 2.39~3.31MPa/100m is much higher than the formation collapse pressure and pore pressure. At the same time, combined with the data obtained from the analysis, the paper puts forward the technical countermeasures of drilling technology suitable for the working area, which provides the basic basis for the drilling engineering design and construction. The research results obtained in this paper will effectively reduce downhole engineering condition, improve drilling efficiency, shorten drilling cycle and reduce drilling and production cost. It has important practical significance to realize high efficiency exploration and development of natural gas in Penglai Zhen formation of Shifang gas field.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE21

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本文編號：1825812