本文選題：大情字井地區(qū) + 高臺子油層��； 參考：《東北石油大學》2017年博士論文

【摘要】：在高分辨率層序地層學理論以及儲層沉積學理論的指導下,以大情字井地區(qū)高臺子油層為研究對象,利用成熟探區(qū)翔實的巖心、測井及三維地震等資料進行了高頻等時層序劃分,通過對各級次基準面旋回的沉積動力學分析與不同級次基準面旋回界面的識別,提出“主干封閉剖面的標準等時面與參照等時面組合的逼近,斷層、沉積對比模式為指導,井震結合,逐級分區(qū)閉合推開”的對比方法,并應用此方法將大情字井地區(qū)高臺子油層劃分為2個長期基準面旋回、21個中期基準面旋回和82個短期基準面旋回,建立了大區(qū)、統(tǒng)一、精細的高分辨率層序地層格架,為儲層單砂體識別、沉積微相及成藏研究等奠定了堅實的地層學基礎。在精細等時地層格架控制的基礎上分析了物源、沉積體系及沉積相的展布特征,提出研究區(qū)高臺子油層青一段、青二段主要受西南�？滴镌�,青三段主要受西部通榆、西南�？岛蜄|南懷德物源影響的三角洲沉積體系,主要發(fā)育三角洲前緣亞相和前三角洲亞相,微相類型主要為水下分流河道、河口壩、席狀砂、席間泥,精細沉積相研究揭示:河流-三角洲相多期多支條帶狀、分支狀大型-特大型河道、河口壩優(yōu)質砂體為該區(qū)缺少大中型構造圈閉的凹陷、簡單斜坡背景形成巖性類油藏群提供了關鍵條件。在詳細研究區(qū)域沉積背景,分析、解剖沉積微相平面相和剖面相特征的基礎上,建立了大情字井地區(qū)高臺子油層條帶狀分支河壩沉積模式。揭示了大情字井地區(qū)3個三角洲類型、特征、分布:最陡(1.23‰)西坡近源垂凹型辮狀河三角洲、最緩(0.42‰)西南遠源順凹型曲流河三角洲、較緩南南東(0.58‰)較遠源斜凹過渡性三角洲類型,建立了3種三角洲沉積模式、砂體分布規(guī)律,為揭示成藏差異性奠定了堅實基礎。在等時地層格架及其內部單砂體空間分布規(guī)律研究的基礎上,充分運用油氣成藏系統(tǒng)等現(xiàn)代油氣地質學新觀點,應用區(qū)域成藏綜合分析技術、單砂體級控油模式分析技術及其復雜區(qū)塊含油預測技術等,通過對已發(fā)現(xiàn)的油藏類型及其分布特征系統(tǒng)分析,指出條帶狀分支河壩砂體與上傾/側緣斷層形成的斷層-巖性圈閉是本區(qū)最關鍵、最重要的控藏圈閉類型(占80%以上)。在油氣成藏地質條件研究的基礎上,認識油氣藏形成的動力學機制,建立油氣成藏的地質模式,研究區(qū)有2種成藏模式:即烴源巖—斷裂—砂體匹配成藏模式和烴源巖—砂體匹配封閉或半封閉成藏模式。根據(jù)區(qū)域成藏及單砂體級油藏解剖,提出“古鼻控帶、源斷控位、斷/巖控圈”控藏模式:成藏期正向古構造帶(構造脊)、斷裂帶、條帶狀分支河壩帶(優(yōu)勢砂)的“脊斷砂三帶疊合”及巖性上傾尖滅帶為有利油氣富集帶。在區(qū)域成藏模式指導下預測有利區(qū)帶7個,在單砂體成藏控制因素指導下,預測有利圈閉172個,部署井位14口。
[Abstract]:Under the guidance of high resolution sequence stratigraphy theory and reservoir sedimentology theory, Gaotaizi reservoir in Daxinzhijing area is taken as the research object, and the mature exploration area is used as the rich core. The logging and 3D seismic data are divided into high frequency isochronous sequences. The sedimentary dynamics of the subdatum cycles at all levels and the identification of the interface of different order base-level cycles are analyzed. The comparison method of "the combination of standard isochronous plane and reference isochronous plane of trunk closed profile, fault and sedimentary correlation model, combined well and earthquake, closed and pushed in step by step" is put forward. By using this method, the Gaotaizi reservoir in Dazhengzhijing area is divided into two long-term base-level cycles, 21 medium-term base-level cycles and 82 short-term base-level cycles, and a large area, unified and fine high-resolution sequence stratigraphic framework is established. It lays a solid stratigraphic foundation for single sand body identification, sedimentary microfacies and reservoir formation. On the basis of the control of fine isochronous stratigraphic framework, the distribution characteristics of provenance, sedimentary system and sedimentary facies are analyzed. It is proposed that the Qing1 member of Gaotaizi oil reservoir in the study area, the Qing2 member mainly by the source of southwest Baokang, and the third member of Qingshan formation mainly by Tongyu in the western part of the study area. The delta sedimentary system influenced by provenance in the southwest of Baokang and Huaide is mainly developed into delta front subfacies and pre delta subfacies. The microfacies are mainly subaqueous distributary channel, estuarine dam, sheet sand, mud between mats, etc. The study of fine sedimentary facies reveals that the fluvial and delta facies in many periods have many branches of banded, branched large and super large river channels, and the high quality sand bodies of estuarine dams are the sag lacking large and medium-sized structural traps in this area. The formation of lithologic reservoir groups in a simple slope background provides the key conditions. On the basis of studying the regional sedimentary background, analyzing, dissecting and dissecting the characteristics of microfacies and dissecting facies, the depositional model of strip branching river dam of Gaotaizi oil layer in Dazhengzhijing area was established. It is revealed that three delta types, characteristics and distribution: the steepest (1.23 鈥，

本文編號：1789008