發(fā)布時(shí)間：2018-06-02 21:26

  本文選題：正常壓實(shí) + 超壓�。� 參考：《中國(guó)科學(xué)院大學(xué)(中國(guó)科學(xué)院海洋研究所)》2017年碩士論文

【摘要】：南海北部深水盆地油氣資源已成為我國(guó)油氣勘探開(kāi)發(fā)的一大熱點(diǎn)。然而,深水地質(zhì)災(zāi)害問(wèn)題是影響深水油氣勘探開(kāi)發(fā)的重要因素,如淺水流、淺層氣、海底滑坡、天然氣水合物分解等。淺水流災(zāi)害是深水油氣鉆井中常見(jiàn)的深水地質(zhì)災(zāi)害,在鉆井過(guò)程中遇到會(huì)出現(xiàn)井漏、井噴,甚至引發(fā)平臺(tái)不穩(wěn)定至坍塌。因此,預(yù)測(cè)和避開(kāi)深水油氣開(kāi)發(fā)過(guò)程中的地質(zhì)災(zāi)害勢(shì)在必行。論文選取南海深水盆地ODP184航次1144、1146、1148站位與IODP349航次U1431、U1432、U1433、U1435站位與X1鉆井的測(cè)井?dāng)?shù)據(jù),結(jié)合地震資料開(kāi)展南海北部深水盆地的超壓和淺水流地球物理識(shí)別和成因機(jī)制研究。為獲取可靠的預(yù)測(cè)超壓結(jié)果,研究了南海深水盆地正常壓實(shí)沉積物的影響因素。分析南海深水盆地沉積物正常壓實(shí)系數(shù)與沉積物組分、沉積速率、沉積物埋深等多個(gè)影響因素的關(guān)系,揭示南海深水盆地不同深度沉積物正常壓實(shí)系數(shù)與初始孔隙度的變化規(guī)律。利用分析后可靠的擬合后正常壓實(shí)系數(shù)進(jìn)行鉆井超壓計(jì)算預(yù)測(cè),分析南海北部深水盆地的超壓地球物理特征和成因機(jī)制。通過(guò)超壓的預(yù)測(cè)與分析進(jìn)一步進(jìn)行南海北部深水盆地超壓淺水流砂體的預(yù)測(cè),結(jié)合超壓淺水流砂體所在地震剖面資料,分析淺水流砂體的地球物理屬性識(shí)別方法。根據(jù)區(qū)域地質(zhì)背景、鉆井資料與地震資料解釋,分析南海北部深水盆地淺水流砂體的成因機(jī)理。并提出了對(duì)淺水流這一深水鉆井淺層地質(zhì)災(zāi)害的預(yù)測(cè)預(yù)防方法。
[Abstract]:Oil and gas resources in deep water basins in the northern South China Sea have become a hot spot in oil and gas exploration and development in China. However, deep-water geological hazard is an important factor affecting the exploration and development of deep-water oil and gas, such as shallow water flow, shallow gas, submarine landslide, gas hydrate decomposition and so on. Shallow flow disaster is a common deep-water geological hazard in deep water oil and gas drilling. During drilling process, well leakage, blowout and even platform instability even collapse will occur. Therefore, it is imperative to predict and avoid geological hazards in the process of oil and gas development in deep water. In this paper, the logging data of ODP184 voyage 1144 / 1146 / 1148 and IODP349 voyage U1431 / U1432 / U1433 / U1435 and X1 well drilling are selected. Combined with seismic data, the over pressure and shallow flow geophysical identification and genetic mechanism of deep water basins in the northern part of the South China Sea are studied. In order to obtain reliable prediction results of overpressure, the influence factors of normal compacted sediments in the South China Sea deep-water basin were studied. The relationship between the normal compaction coefficient of sediments in the South China Sea Deepwater Basin and several factors, such as sediment composition, sedimentation rate, sediment burial depth and so on, is analyzed. The variation of normal compaction coefficient and initial porosity of sediments at different depths in the South China Sea deepwater basin is revealed. The overpressure geophysical characteristics and genetic mechanism of the deep-water basins in the northern South China Sea are analyzed by using the reliable fitting normal compaction coefficient to calculate and predict the overpressure in drilling wells. Through the prediction and analysis of overpressure, the prediction of overpressure shallow water flow sand body in the deep water basin of the northern South China Sea is further carried out. Combined with the seismic profile data of the overpressure shallow water flow sand body, the geophysical attribute identification method of the shallow water flow sand body is analyzed. Based on the regional geological background and interpretation of drilling data and seismic data, the genetic mechanism of shallow flowing sand bodies in deep water basins in the northern part of the South China Sea is analyzed. The method of prediction and prevention of shallow water flow, a shallow geological hazard in deep water drilling, is put forward.
【學(xué)位授予單位】：中國(guó)科學(xué)院大學(xué)(中國(guó)科學(xué)院海洋研究所)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：P618.13

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本文編號(hào)：1970254