【摘要】：以高分辨率層序地層學(xué)理論及其方法技術(shù)為指導(dǎo),利用研究區(qū)巖心、測(cè)井、錄井、試油及三維地震等資料,通過(guò)對(duì)各級(jí)次基準(zhǔn)面旋回的分析與不同級(jí)次基準(zhǔn)面旋回界面的識(shí)別,建立了松遼盆地南部乾西北地區(qū)青三段單砂體級(jí)高分辨率層序地層格架。在精細(xì)等時(shí)地層格架控制下分析了物源、沉積體系及沉積微相,并以此為基礎(chǔ)開(kāi)展乾西北地區(qū)青三段各小層沉積微相研究及單砂體識(shí)別。研究表明,本區(qū)極其復(fù)雜的油水分布并非受地層組、砂組、甚至小層,而是受單砂體控制,且其成為制約與認(rèn)識(shí)qn3段油層的關(guān)鍵。乾西北qn3三角洲前緣砂體為北東向帶狀單砂體群,在明末構(gòu)造局部反轉(zhuǎn)形成上傾尖滅,并向兩側(cè)尖滅,頂部有局部泥巖蓋層,具備大型巖性圈閉群及成藏有利條件。發(fā)現(xiàn)全區(qū)最主力油層25小層遠(yuǎn)砂壩砂體,及對(duì)長(zhǎng)達(dá)20km、寬1000-2000m的大型帶狀遠(yuǎn)砂壩的預(yù)測(cè),對(duì)下部勘探、開(kāi)發(fā)具重大意義。同時(shí)指出目前勘探程度很低的研究區(qū)南部為有利潛力區(qū),目的層應(yīng)是qn3下部(Ⅻ、Ⅺ砂組),而不是目前東部主力探區(qū)的qn3中上部(Ⅶ、Ⅷ、Ⅸ、Ⅱ)地層。
[Abstract]:Guided by the theory of high-resolution sequence stratigraphy and its method and technology, using the core, logging, oil testing and 3D seismic data in the study area, the analysis of the cycles of subdatum levels and the identification of the interface of different order base-level cycles are carried out. The high resolution sequence stratigraphic framework of single sand body in the third member of Qingshan formation in the northwest of Qianbei area in the south of Songliao Basin is established. Under the control of fine isochronous stratigraphic framework, the provenance, sedimentary system and sedimentary microfacies were analyzed, and the sedimentary microfacies and single sand body identification of the third member of the Qingjiang formation in the northwest part of the Qianbei area were carried out on the basis of the analysis of the source, sedimentary system and sedimentary microfacies. The study shows that the extremely complex distribution of oil and water in this area is not controlled by stratigraphic formation, sand formation, or even small layer, but by single sand body, and it becomes the key to restrict and understand the formation of qn3 formation. The qn3 delta front sand body in the northwest of Qianbei is a northeastward zonal single sand body group. In the late Ming Dynasty, the local inversion of the structure formed an updip pinnacle, which was pointed out to both sides, with a local mudstone caprock at the top, with large lithologic trap group and favorable conditions for reservoir formation. It is found that the sand body of 25 small layers far sand bar in the most important oil layer in the whole area and the prediction of the large belt bar with a length of 20 km and a width of 1000-2000m are of great significance for the exploration and development of the lower part of the reservoir. At the same time, it is pointed out that the south of the study area with very low exploration degree is the favorable potential area, and the target layer should be the lower part of qn3 (XII, XI sand formation), rather than the middle and upper qn3 strata (鈪，

本文編號(hào)：2270502