本文選題：柴達(dá)木盆地 + 地層壓力�。� 參考：《東北石油大學(xué)》2017年碩士論文

【摘要】：柴達(dá)木盆地,地處青藏高原東北部,青海省西北部,蘊(yùn)含著豐富的油氣資源。由于該地區(qū)存在巨厚沉積地層,地下情況復(fù)雜,含有多套壓力系統(tǒng),地層地應(yīng)力也存在各向異性現(xiàn)象。另外,該地區(qū)經(jīng)過(guò)多次的構(gòu)造運(yùn)動(dòng),地質(zhì)系統(tǒng)脆弱,在鉆井過(guò)程中容易出現(xiàn)井塌、井漏現(xiàn)象,這些都使得柴達(dá)木盆地油氣勘探開(kāi)發(fā)的進(jìn)一步發(fā)展受到很大限制。因此,對(duì)柴達(dá)木盆地重點(diǎn)區(qū)域的地層三壓力進(jìn)行準(zhǔn)確計(jì)算分析,總結(jié)重點(diǎn)層位地層三壓力分布特征,探討異常高壓形成并結(jié)合實(shí)鉆情況進(jìn)行綜合分析,具有重要的工程意義。本文從柴達(dá)木盆地重點(diǎn)區(qū)已鉆探井的鉆探資料出發(fā),建立了數(shù)據(jù)庫(kù)。通過(guò)統(tǒng)計(jì)分析該地區(qū)已鉆井的鉆井復(fù)雜情況、鉆頭使用情況、錄井巖性數(shù)據(jù)及地質(zhì)構(gòu)造背景資料,對(duì)該地區(qū)的地層孔隙壓力等做出了初步分析。利用已鉆重點(diǎn)探井的測(cè)井和錄井資料,建立了地層孔隙壓力檢測(cè)剖面;通過(guò)選取近年來(lái)鉆井工程比較復(fù)雜的探井進(jìn)行剖析,找出了發(fā)生復(fù)雜情況的主要原因;繪制出了重點(diǎn)層位地層壓力平面分布圖和連井縱向?qū)Ρ葓D,并找出了地層壓力平面與縱向分布的特征。根據(jù)柴達(dá)木盆地地質(zhì)構(gòu)造特點(diǎn)及實(shí)鉆情況,再結(jié)合測(cè)錄井資料和地震預(yù)測(cè)結(jié)果找出了盆地內(nèi)異常壓力(異常低壓和異常高壓)發(fā)育區(qū)帶及層段,分析得出該地區(qū)各層位的異常孔隙壓力形成機(jī)制,并根據(jù)超壓機(jī)制對(duì)地層壓力計(jì)算結(jié)果進(jìn)行了校核。
[Abstract]:The Qaidam Basin, located in the northeast of the Qinghai-Tibet Plateau and northwest of Qinghai Province, is rich in oil and gas resources. Due to the existence of extremely thick sedimentary strata and complex underground conditions, there are many sets of pressure systems and anisotropy of formation stress. In addition, after many tectonic movements, the geological system is fragile, well collapse and well leakage are easy to occur in the drilling process, which make the further development of oil and gas exploration and development in Qaidam Basin greatly restricted. Therefore, it is of great engineering significance to accurately calculate and analyze the three formation pressures in the key area of Qaidam Basin, summarize the distribution characteristics of the three pressures in the key strata, discuss the formation of abnormal high pressure and carry out comprehensive analysis combined with the actual drilling situation. Based on the drilling data of wells drilled in the key area of Qaidam Basin, a database is established in this paper. Based on the statistical analysis of the drilling complexity, bit usage, logging lithologic data and geological structure background data, the formation pore pressure in this area is preliminarily analyzed. Based on the logging and logging data of the drilled key exploration wells, the formation pore pressure detection profile is established, and the main reasons for the complex situation are found through the analysis of the exploration wells which are relatively complicated in drilling engineering in recent years. The distribution map of the formation pressure plane and the vertical correlation map of the connected wells are drawn, and the characteristics of the formation pressure plane and the vertical distribution are found out. According to the geological structure characteristics and actual drilling situation of Qaidam Basin, combined with logging data and seismic prediction results, the abnormal pressure (abnormal low pressure and abnormal high pressure) developed zones and strata in the basin are found out. The formation mechanism of abnormal pore pressure in each layer of this area is obtained and the calculation results of formation pressure are checked according to the mechanism of overpressure.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TE21;P618.13

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本文編號(hào)：2006048