本文選題：低滲透甜點儲層　切入點：成藏機理　出處：《中國石油大學(北京)》2016年博士論文　論文類型：學位論文

【摘要】：珠江口盆地陸豐凹陷古近系文昌組和恩平組儲層物性較差,油氣成藏特征復(fù)雜。本文從陸豐凹陷沉積和構(gòu)造背景出發(fā),著重研究低滲儲層甜點形成機理和油氣成藏條件,探討油氣成藏機理,總結(jié)陸豐凹陷油氣富集規(guī)律,確定低滲透油藏定量評價方法,指出有利成藏區(qū)分布范圍。研究結(jié)果對加速該區(qū)古近系深層油氣藏勘探具有重要的理論指導(dǎo)意義和實際參考價值�；阢@井巖心資料、沉積特征及構(gòu)造演化,分析了陸豐凹陷南部文昌組和恩平組低滲透儲層基本特征及甜點儲層形成機理和評價標準,將儲層劃分為Ⅰ類儲層(甜點)、Ⅱ類儲層(甜點)、Ⅲ類儲層和Ⅳ類儲層。甜點儲層形成機理主要有三類:有機酸溶蝕、大氣淡水淋濾和異常高壓保護孔隙作用控制。油氣成藏條件研究表明陸豐凹陷有效烴源巖是發(fā)育在文四段的中深湖相泥巖。烴源巖類型為Ⅱ1-Ⅰ型,有機質(zhì)類型好,成熟度高,生烴能力強。研究區(qū)發(fā)育三套區(qū)域蓋層,自下而上為古近系文四段湖相泥巖、珠江組碳酸鹽巖臺地相灰?guī)r和韓江組海相泥巖。油氣輸導(dǎo)體系包括斷層、連通砂巖和不整合復(fù)合體,斷層控制油氣垂向運移,連通砂體和不整合復(fù)合體控制油氣側(cè)向調(diào)整。圈閉類型主要有構(gòu)造圈閉和地層圈閉,同時還有受構(gòu)造、連通砂體、不整合聯(lián)合控制的復(fù)合圈閉。通過對成藏條件研究及已鉆井油藏解剖,將陸豐凹陷劃分為三個成藏體系:近源斷陷成藏體系、遠源過渡成藏體系和遠源網(wǎng)毯成藏體系。近源斷陷成藏體系可分為陡坡帶、深洼帶、洼中隆起帶、緩坡帶油氣成藏組合。遠源網(wǎng)毯成藏體系可分為下部倉儲層和上部聚集網(wǎng)層成藏組合。綜合考慮各類成藏模式下油氣成藏條件差異特征,闡明陸豐凹陷古近系油氣成藏的主控因素:低滲背景下甜點儲層存在是油氣成藏的核心,有效輸導(dǎo)體系是油氣成藏關(guān)鍵,有利成藏組合決定油藏類型、規(guī)模及分布范圍。在此基礎(chǔ)上選出古近系各項資料相對詳盡的含油區(qū)塊并提取各類油氣成藏評價指標,按照輸導(dǎo)體系細分、儲層質(zhì)量評估、圈閉組合詳查的準則,確定評價內(nèi)容,根據(jù)評價內(nèi)容的貢獻量制定加權(quán)系數(shù),每個內(nèi)容里制定分類評價標準及評價指數(shù)。最后將各項評價指數(shù)疊加獲得評價系數(shù),從中優(yōu)選出3個有利成藏區(qū)帶。
[Abstract]:The reservoir physical properties of Wenchang formation and Enping formation of Paleogene in Lufeng depression of Zhujiang River mouth basin are poor and the characteristics of oil and gas accumulation are complex. Based on the sedimentary and structural background of Lufeng sag, this paper focuses on the formation mechanism of desserts and the conditions of oil and gas accumulation in low permeability reservoirs. The mechanism of oil and gas accumulation is discussed, the accumulation law of oil and gas in Lufeng sag is summarized, and the quantitative evaluation method of low permeability reservoir is determined. The paper points out the distribution range of favorable reservoir forming area. The research results have important theoretical guiding significance and practical reference value for accelerating exploration of Paleogene deep oil and gas reservoirs in this area. Based on drilling core data, sedimentary characteristics and structural evolution. The basic characteristics of low permeability reservoirs of Wenchang formation and Enping formation in the south of Lufeng sag, the formation mechanism and evaluation criteria of desserts reservoir are analyzed. The reservoir is divided into 鈪，

本文編號：1570287