本文選題：安塞油田　切入點：長6油層組　出處：《西北大學》2015年碩士論文　論文類型：學位論文

【摘要】：化子坪南區(qū)是安塞杏子川采油廠勘探新區(qū)塊,近年來該區(qū)塊陸續(xù)進入開發(fā)階段。由于化子坪南區(qū)滲砂體分布和微相展布未做精細刻畫研究,同時對該區(qū)域儲層巖性、電性、含油情況以及油藏特征認識不夠深入,嚴重制約了研究區(qū)石油開發(fā)與進一步的勘探工作。針對該現(xiàn)狀,對該區(qū)塊進行地質(zhì)精細刻畫、儲層“四性”關(guān)系以及油藏特征研究是非常必要的。本文以石油地質(zhì)學、儲層沉積學等多門地質(zhì)學科為指導,在鉆井、測井及錄井、分析測試資料以及試油試采資料的基礎上,對化子坪南區(qū)沉積相展布、儲層特征、儲層“四性”關(guān)系及油藏特征進行研究,并總結(jié)了該區(qū)域油藏控制因素�；悠耗蠀^(qū)構(gòu)造上表現(xiàn)為平緩的西傾單斜,發(fā)育2個寬緩鼻狀隆起。長6油層組發(fā)育三角洲前緣亞相,水下分流河道和河口壩是該區(qū)儲層骨架砂體,同時也是油氣儲存的主要場所。研究區(qū)發(fā)育殘余粒間孔、溶蝕粒間孔、粒內(nèi)溶孔、微孔隙及微裂隙,其中以溶蝕粒間孔、粒內(nèi)溶孔及殘余粒間孔為主。實驗分析孔隙度主要分布在9.0-11.0%,平均值為9.2%；滲透率主要分布在0.2～0.6×10-3μm2,平均值為0.52×10-3μm2。屬于特低孔、特低滲儲層。通過對該區(qū)“四性”關(guān)系研究總結(jié)出,研究區(qū)巖性下限為細砂巖,含油產(chǎn)狀定在油跡級及以上。有效儲層孔隙度、滲透率下限分別為7.5%、0.24×10-3μm2。由電性圖版確定有效厚度電性下限：△t≥224.0μs/m,ILD≥18.0Ω.m,So≥38.0%；224.0≥Δt≥216.0μs/m, ILD=-0.75*Δt+186Q.m,So≥38.0%。研究區(qū)測井解釋孔隙度分布范圍7.5～14.1%,平均值為9.8%；滲透率分布范圍0.24～3.21×10-3μm2,平均值為0.57×10-3μm2�；悠耗蠀^(qū)長6油層組為典型的巖性油藏,油氣在空間上分布不均�？v向上,油氣層位分布不均勻,主要集中在長6’、長62小層,長63占據(jù)比例較��；平面上,油氣主要富集在工區(qū)的西北角—化子坪主體區(qū)的擴邊區(qū)。研究區(qū)屬于低豐度、低產(chǎn)能、中淺層,特低孔特低滲、小型儲量規(guī)模、輕質(zhì)常規(guī)油藏。油藏形成主要受河道有效砂體、泥巖和致密砂巖的側(cè)向遮擋、鼻狀隆起及濁沸石溶孔等因素控制。
[Abstract]:Huaziping South District is a new exploration area block in Ansai Xingzichuan Oil production Plant. In recent years, the block has entered the stage of development. Since the distribution of sand seepage body and microfacies distribution in Huaziping South District have not been studied in detail, the lithology and electrical properties of the reservoir in this area have been studied at the same time. The understanding of oil content and reservoir characteristics is not deep enough, which seriously restricts the oil development and further exploration in the study area. In view of the present situation, the geological fine characterization of the block is carried out. It is very necessary to study the relationship of "four properties" of reservoir and reservoir characteristics. This paper is guided by petroleum geology, reservoir sedimentology and many other geological disciplines, on the basis of drilling, logging and logging, analysis of test data and production test and production test data. The distribution of sedimentary facies, reservoir characteristics, relationship of reservoir "four properties" and reservoir characteristics are studied in Huaziping South region, and the controlling factors of reservoir in this area are summarized. Two broad and slow nose uplift are developed. The delta front subfacies is developed in Chang 6 oil formation. The underwater distributary channel and estuarine dam are the reservoir skeleton sand bodies in this area, and are also the main places for oil and gas storage. The residual intergranular pore and the solution intergranular pore are developed in the study area. The dissolution pore, micropore and microfissure are mainly composed of dissolved intergranular pore, intragranular dissolved pore and residual intergranular pore. The experimental analysis shows that the porosity is mainly distributed in the range of 9.0-11.0 with an average value of 9.2%, and the permeability is mainly distributed in 0.2n 0.6 脳 10 -3 渭 m 2 with an average value of 0.52 脳 10 -3 渭 m 2. Through the study of the relationship between "four properties" in this area, it is concluded that the lower limit of lithology in the study area is fine sandstone, the oil bearing pattern is defined in oil trace level and above, and the effective reservoir porosity, The lower limit of permeability is 7.55 脳 10 ~ (-3) 渭 m ~ (-2) respectively. The electric limit of effective thickness is determined by electrical chart: t 鈮，

本文編號：1614608