本文選題：太東地區(qū)　切入點(diǎn)：沉積相　出處：《東北石油大學(xué)》2017年碩士論文

【摘要】：九十年代以來由于有利的正向構(gòu)造均已被鉆探,尋找新的含油氣構(gòu)造難度越來越大,而由于地質(zhì)研究不足,使太東地區(qū)的地質(zhì)特征、油氣水關(guān)系、油藏類型及分布規(guī)律尚未認(rèn)識清楚,導(dǎo)致勘探進(jìn)展緩慢,難以打開新的局面。為解決這一系列的問題,本文對太東地區(qū)葡萄花油層儲(chǔ)層及其對油氣分布控制作用進(jìn)行研究。首先應(yīng)用高分辨率層序地層學(xué)原理和方法建立姚一段層序地層格架,進(jìn)行層序地層劃分對比,認(rèn)為姚家組一段底部為不整合面和姚家組一段與二、三段之間的密度段為Ⅰ類層序界面。姚一段內(nèi)部發(fā)育可區(qū)域?qū)Ρ鹊哪鄮r層為Ⅱ類層序界面。以識別出的三個(gè)層序界面為邊界,依據(jù)沉積基準(zhǔn)面升降原理識別出低水位體系域(Ⅰ)和湖盆擴(kuò)張?bào)w系域(Ⅱ)。根據(jù)內(nèi)部的發(fā)育較廣泛的泥巖層作為內(nèi)部細(xì)分的標(biāo)志層,將太東地區(qū)葡萄花油層劃分為7個(gè)準(zhǔn)層序。在地層劃分對比的基礎(chǔ)上,充分利用地震、鉆井、測井資料,對低水位和湖盆擴(kuò)張?bào)w系域的沉積環(huán)境進(jìn)行了綜合分析,識別出太東地區(qū)葡萄花油層主要發(fā)育三角洲前緣亞相,包括水下分流河道、河口壩、遠(yuǎn)砂壩以及席狀砂微相;以點(diǎn)-線-面的研究思路對研究區(qū)的沉積微相進(jìn)行研究,結(jié)果表明:研究區(qū)為典型的“退積式”沉積,平面上主要發(fā)育北部物源和西部物源,7個(gè)準(zhǔn)層序自下而上,河道沉積逐漸萎縮,1號準(zhǔn)層序大面積為湖相沉積。然后,在儲(chǔ)層的宏觀和微觀發(fā)育特征以及有效物性研究的基礎(chǔ)上,利用鉆井、錄井、試油、地震等開發(fā)數(shù)據(jù)對油藏進(jìn)行精細(xì)解剖結(jié)果表明,太東地區(qū)發(fā)育3個(gè)油氣聚集帶,每個(gè)油氣聚集帶由于沉積相帶、斷裂特征、儲(chǔ)層物性不同各自有不同的油藏類型和油水分布規(guī)律。西部斜坡油氣聚集帶為巖性—構(gòu)造油藏,宋芳屯鼻狀構(gòu)造油氣聚集帶為斷塊油藏;永樂向斜油氣聚集帶為巖性油藏。最后,在儲(chǔ)層發(fā)育特征和油水分布規(guī)律研究的基礎(chǔ)上,研究儲(chǔ)層對油氣分布的控制作用,結(jié)果表明,太東地區(qū)葡萄花油層儲(chǔ)層對油氣分布的控制作用主要體現(xiàn)在兩個(gè)方面:(1)儲(chǔ)層沉積相類型控制著油氣分布,位于三角洲內(nèi)前緣亞相的分流河道砂巖厚度大、含油性好、單井產(chǎn)能高;(2)儲(chǔ)層物性控制著油氣的產(chǎn)能,儲(chǔ)層的孔隙度越大油氣的總產(chǎn)能就愈高,儲(chǔ)層滲透率越大單井油氣產(chǎn)能越高。
[Abstract]:Since the 1990s, because favorable forward structures have been drilled, it is becoming more and more difficult to find new petroliferous structures. However, due to insufficient geological research, the geological characteristics and oil-gas-water relationship in Taidong region have become more and more difficult.Reservoir types and distribution laws are not well understood, resulting in slow exploration progress and difficult to open up a new situation.In order to solve this series of problems, this paper studies the reservoir of Putaohua reservoir and its controlling effect on oil and gas distribution in Taidong area.Firstly, the sequence stratigraphic framework of the first member of Yao formation is established by using the principle and method of high-resolution sequence stratigraphy, and the sequence stratigraphic division and correlation are carried out. It is considered that the bottom of the first member of the Yao formation is unconformable surface and the first and second member of the Yao formation.The density segment between the three members is a class I sequence interface.The mudstone layer which can be contrasted regionally developed in the first member of Yao formation is a class 鈪，

本文編號：1703549