【摘要】：輪古油田中部斜坡帶位于輪南低凸起,主要產(chǎn)油氣層位為中下奧陶統(tǒng)鷹山組地層,是塔里木盆地勘探程度最高的區(qū)域之一。輪古油田奧陶系碳酸鹽巖儲層非均質(zhì)性強,油氣水分布關(guān)系復(fù)雜,局部出現(xiàn)油氣水分異,且埋藏深,具多期次油氣充注等特點。本文將以輪古中部斜坡帶奧陶系油藏為主要研究對象,通過原油族組成、原油生物標(biāo)志化合物、包裹體、儲層瀝青生物標(biāo)志化合物等分析,對該地區(qū)的成藏特征進行研究,獲得如下結(jié)論與認識： 1、中部斜坡帶地區(qū)主要包括輪古7、輪古2和桑南西三大井區(qū),整個區(qū)塊位于輪南古潛山的隆起高部位,裂縫及巖溶十分發(fā)育。奧陶系碳酸鹽巖儲層中主要為油、氣、水三者共存。輪古地區(qū)遭受強烈的風(fēng)化剝蝕作用,導(dǎo)致輪古中部斜坡帶奧陶系產(chǎn)層主要為奧陶系中下統(tǒng)的鷹山組地層。 2、中部斜坡帶鷹山組儲層巖石類型以泥晶灰?guī)r為主,其次為粒屑灰?guī)r。其儲層基質(zhì)為低孔、特低滲范疇,主要儲集空間為構(gòu)造及巖溶作用形成的次生溶蝕孔、縫和溶洞。 3、輪南地區(qū)主要發(fā)育有輪南西部地區(qū)哈拉哈塘凹陷的奧陶系烴源巖和輪南東部地區(qū)草湖凹陷的寒武系烴源巖。其中奧陶系烴源巖現(xiàn)今Ro值在1.2%～1.6%,進入了生油高峰時期,寒武系烴源巖現(xiàn)今1.6%～2.4%,進入生氣階段。 4、輪古油田奧陶系具有相同的油氣來源,具有寒武系烴源巖和中～下奧陶統(tǒng)烴源巖混原油的特征,且至少存在三期油氣的運移與充注,輪古7井區(qū)存在兩期油氣充注,輪古2井區(qū)和桑南西井區(qū)存在三期包充注,并且輪古7地區(qū)和桑南西地區(qū)第一期油的充注時期較早,且發(fā)生了較強烈的生物降解,后期油氣充注的多少決定原油性質(zhì)的好壞。 5、利用生物標(biāo)志化合物參數(shù)判斷輪古油田中部斜坡帶油氣運移的方向為兩個方向,分別為南北向以及東西向充注過程
[Abstract]:The central slope zone of Lungu Oilfield is located in the low uplift of Lunnan, and the main oil-producing reservoir is the Yingshan formation of the Middle and Lower Ordovician, which is one of the highest exploration areas in the Tarim Basin. The Ordovician carbonate reservoir in Lungu Oilfield is characterized by strong heterogeneity, complex oil-gas-water distribution relationship, local oil and gas moisture variation, deep burial, multi-stage oil and gas filling and so on. This paper will take Ordovician reservoir in the central slope zone of Lungu as the main research object, through the analysis of crude oil family composition, crude oil biomarkers, inclusions, reservoir asphalt biomarker compounds, etc., to study the reservoir forming characteristics in this area. The main conclusions are as follows: 1. The central slope zone mainly includes three major well areas, Lungu 7, Lungu 2 and Sannanxi. The whole block is located in the high part of Lunnan buried hill, and the fractures and karst are well developed. In Ordovician carbonate reservoir, oil, gas and water coexist. The strong weathering and denudation in Lungu area resulted in the formation of Ordovician in the central slope zone of Luanggu mainly being Yingshan formation of middle and lower Ordovician. 2. The rock type of Yingshan formation reservoir in the middle slope zone of the central slope is mainly mudstone limestone. The next is granulite limestone. The reservoir matrix is low porosity and very low permeability, and the main reservoir space is secondary dissolution pore formed by structure and karstification. 3. There are Ordovician source rocks in the Harahatang Sag in the western part of Lunnan area and Cambrian source rocks in the Caohu Sag in the eastern part of Lunnan area. The present Ro value of the Ordovician source rocks is 1.2 ~ 1.6, which has entered the peak period of oil generation. The Cambrian source rocks are now 1.6 ~ 2.4 and enter the gas generation stage. 4. The Ordovician in Lungu Oilfield has the same source of oil and gas. It has the characteristics of Cambrian source rock and middle to lower Ordovician source rock mixed crude oil, and there are at least three stages of oil and gas migration and charging, two stages of oil and gas filling in Lungu 7 well area, three stages of oil and gas filling in Lungu 2 well area and Sannanxi well area. The filling period of the first stage oil in Lungu 7 area and Sangnanxi area was earlier, and the biodegradation occurred strongly. The quantity of oil and gas filling in the late stage determines the quality of crude oil. 5. Using the parameters of biomarker compounds to judge the migration direction of oil and gas in the middle slope zone of Lungu oilfield is two directions, namely, the filling process in the north-south direction and the east-west direction
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P618.13

【參考文獻】

中國期刊全文數(shù)據(jù)庫 前10條

1 劉洛夫;塔里木盆地群4井原油吡咯類含氮化合物地球化學(xué)研究[J];沉積學(xué)報;1997年02期

2 倪新鋒;張麗娟;沈安江;潘文慶;喬占峰;;塔北地區(qū)奧陶系碳酸鹽巖古巖溶類型、期次及疊合關(guān)系[J];中國地質(zhì);2009年06期

3 季敏;譚麗娟;劉斌;;隱蔽油氣藏研究的現(xiàn)狀和發(fā)展趨勢[J];斷塊油氣田;2009年04期

4 葉松,張文淮,張志堅;有機包裹體熒光顯微分析技術(shù)簡介[J];地質(zhì)科技情報;1998年02期

5 徐國強,李國蓉,劉樹根,武恒志,田納新,李智武;塔里木盆地早海西期多期次風(fēng)化殼巖溶洞穴層[J];地質(zhì)學(xué)報;2005年04期

6 王強;;油氣二次運移地球化學(xué)研究基礎(chǔ)和進展[J];化學(xué)工程與裝備;2012年01期

7 顧家裕;塔里木盆地輪南地區(qū)下奧陶統(tǒng)碳酸鹽巖巖溶儲層特征及形成模式[J];古地理學(xué)報;1999年01期

8 鄭朝陽;柳益群;段毅;于文修;樊婷婷;張學(xué)軍;;塔里木盆地塔河油田石炭系、三疊系原油地球化學(xué)特征及成因研究[J];高校地質(zhì)學(xué)報;2011年02期

9 周榮;;塔河油田西北部奧陶系原油成熟度特征研究[J];長江大學(xué)學(xué)報(自科版);2013年16期

10 苗忠英;趙省民;鄧堅;陸程;師生寶;王晶;毛立全;;淺變質(zhì)烴源巖生物標(biāo)志物地球化學(xué)——以漠河盆地漠河組為例[J];地質(zhì)學(xué)報;2014年01期

，

本文編號：2283728