本文選題：巴音都蘭凹陷北洼槽 + 構造解釋��； 參考：《西南石油大學》2015年碩士論文

【摘要】：本論文利用構造地質分析理論、地球物理學并結合沉積學方法,充分利用了測井、錄井、巖心和三維地震資料以及油田試油數(shù)據等資料,對二連盆地巴音都蘭凹陷北洼槽騰格爾組、阿爾善組的構造特征和沉積相進行了研究。 研究區(qū)地層劃分為阿爾善組、騰一下亞段、騰一上亞段和騰二下亞段四個層段。首先利用聲波時差測井資料制作合成地震記錄進行層位標定,隨后采用相干體、水平時間切片等技術,進行三維構造解釋。經過時深轉換,將各目的層位頂?shù)捉缑娴牡萒0圖轉化為深度構造圖,并分析了其構造特征。經分析這些斷層大致可分為兩組：一組是主干斷層,其具有發(fā)育時間長、斷距大、延伸遠的特點,此類斷層延伸方向多為北偏東；另一組為近東西向延伸的小斷層,主要作用是將斷階帶或者斜坡進一步復雜化,從而形成一系列的斷塊、斷鼻構造,為油氣的聚集提供了有利場所。阿爾善組時期構造活動劇烈,發(fā)育多條近南北向大斷層,凹陷沿北西向拉張斷陷,形成東南斷、西北超的單斷箕狀盆地。到騰一段時期斷陷活動有所減弱,表現(xiàn)為斷拗型。騰二段時期邊界斷裂形成的沉降活動明顯減弱,凹陷表現(xiàn)為整體沉降的特征,為坳陷型沉積,沉積范圍明顯擴大,地層厚度橫向變化變小。構造格局由北高南低型逐步演變?yōu)槟细弑钡托?此時工區(qū)南部隆起特征已初見雛形,形成一總體向北傾緩的低幅單斜構造。 在沉積相研究中,結合區(qū)域地質背景、鉆井資料、測井資料、巖心照片和三維地震資料,對巴音都蘭凹陷北洼槽的目的層進行沉積相的研究,認為該區(qū)主要發(fā)育湖泊相、扇三角洲相和近岸水下扇相,并對各類亞相至微相進行了詳細的描述。在單井相劃分和連井相對比的基礎之上,用地震相作為約束條件來確定各類沉積相的展布范圍。 經分析,阿爾善組東西兩側主要發(fā)育扇三角洲；騰一下亞段期由于湖平面的快速上升主要發(fā)育濱淺湖相和半深湖相。騰一上亞段湖平面相對下降,物源充足,在陡岸帶發(fā)育近岸水下扇相,而緩坡帶扇三角洲相發(fā)育。到騰二下亞段時,湖盆進一步萎縮,扇體逐漸向湖中心進積。 利用以上構造和沉積相的研究成果,結合本區(qū)的試油資料,從油藏的成藏規(guī)律出發(fā),預測有利區(qū)帶,部署了2口建議井位。
[Abstract]:Based on the theory of tectonic geology analysis, geophysics and sedimentology, this paper makes full use of well logging, core and 3D seismic data and oil field test data. The structural characteristics and sedimentary facies of the Tengger formation and Alshan formation in the northern depression of Bayindolan depression in Erlian Basin were studied. The stratigraphy of the study area is divided into four layers: Arshan formation, Teng Xia submember, Tengyi upper submember and Tengerxia submember. First, synthetic seismic records are made from sonic time difference logging data for horizon calibration, and then three dimensional structural interpretation is carried out by using coherent volume and horizontal time slice techniques. Through time-depth conversion, the iso-T _ 0 map of the top-to-bottom interface of each target layer is transformed into a depth structural map, and its structural characteristics are analyzed. These faults can be roughly divided into two groups: one is the main fault, which has the characteristics of long development time, large fault distance and long extension, the extension direction of these faults is mostly from the north to the east, and the other group is the small fault extending near the east to the west. The main role is to further complicate the fault terrace or slope, thus forming a series of fault blocks, fault nose structure, which provides a favorable place for oil and gas accumulation. During the period of Alshan formation, the tectonic activity was intense, and many faults were formed in the north and south direction, and the depression extended along the NW direction, forming a single faulted dustpan basin with southeast fault and northwest Chao. During the period of Teng period, the activity of fault depression was weakened, showing the type of fault depression. The subsidence activity formed by boundary faults in the period of the second member of Teng formation is obviously weakened, and the depression is characterized by the integral subsidence, which is depression-type deposition, the sedimentary range is obviously expanded, and the lateral variation of stratum thickness becomes smaller. The tectonic pattern evolved from the north high to the south low to the south high and the north low, at this time, the southern uplift of the working area had taken the embryonic form and formed a low-amplitude monoclinal structure with a general northward dip. In the study of sedimentary facies, combined with regional geological background, drilling data, logging data, core photographs and three dimensional seismic data, the sedimentary facies of the northern depression of Bayindolan depression are studied. It is considered that the lacustrine facies are mainly developed in this area. Fan delta facies and nearshore underwater fan facies are described in detail. On the basis of single well facies division and contiguous well correlation seismic facies are used as constraint conditions to determine the distribution range of various sedimentary facies. According to the analysis, fan deltas are mainly developed on the east and west sides of the Alshan formation, and the shallow and semi-deep lacustrine facies are mainly developed in the stage of uplift due to the rapid rise of the lake level. The lake level of the upper segment of Tengyi is relatively lower and the provenance is abundant. The subaqueous fan facies is developed in the steep bank zone and the fan delta facies is developed in the gentle slope zone. The lake basin shrinks further and the fan body gradually accumulates toward the center of the lake. Based on the research results of the above structures and sedimentary facies and combined with the oil test data in this area, the favorable zones are predicted from the reservoir formation law, and two suggested well locations are deployed.
【學位授予單位】：西南石油大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P618.13

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