本文選題：杏子川油田　切入點：延安組　出處：《西北大學》2017年碩士論文　論文類型：學位論文

【摘要】：安塞杏子川油田三疊系延長組勘探開發(fā)已進入中、后期,尋找新的開發(fā)層系已迫在眉睫。除延長組之外,侏羅系延安組也是鄂爾多斯盆地重要的含油層系。目前杏子川油田延安組油藏零星分布,關于該油田延安組石油聚集規(guī)律及油藏分布情況研究較少,認識不清;河湖相三角洲平原向三角洲前緣轉化過程尚不明確。該油田延安組地層相對于延長組來說,具有勘探程度低、儲層物性好、單井產量高、勘探開發(fā)潛力巨大的特點。前人研究表明,延安組地層油藏主要位于延安組下段延7～延9油層組。因此,針對該油田延安組延7～延9油層組進行沉積相研究,精細刻畫延7～延9沉積期砂體展布,從而辨明石油聚集規(guī)律,對該油田下一步勘探開發(fā)新方向和油田增儲上產具有重要的戰(zhàn)略意義。本次論文研究層位為延7、延8、延9油層組。通過對研究區(qū)916 口井進行分層解釋,結合鉆井、錄井、測井資料、分析測試資料和現場巖心觀察、野外剖面觀察,運用沉積學及石油地質學知識,對研究區(qū)研究層位砂體、砂地比、砂體結構、古構造平面展布特征及富縣組古地貌進行研究,根據已有產油井特征,對延安組延7～延9油層組石油聚集規(guī)律及主控因素進行總結并預測有利區(qū)。研究區(qū)延安組下段延7和延8主體為三角洲前緣亞相,東北部小面積區(qū)域為三角洲平原亞相,骨架砂體為水下分流河道砂體;延9為三角洲平原亞相,骨架砂體為分流河道砂體。在砂體平面展布上,延7和延9均發(fā)育7條北東—南西向主砂帶,延8發(fā)育6條北東—南西主砂帶。研究區(qū)延安組含油層位開發(fā)程度較低,通過對已出油井進行研究,結合富縣組古地貌及各研究層位單因素平、剖面圖,總結得出研究區(qū)延安組下段延7～延9油層組油氣富集主控因素為:(1)三角洲前緣(或三角洲平原)水下分流(或分流)河道主砂帶展布;(2)斜坡古地貌;(3)古、今構造鼻狀隆起;(4)泥巖或致密砂巖側向遮擋。綜合上述因素,對研究區(qū)延7～延9油層組進行有利區(qū)預測,優(yōu)選出三個有利區(qū),分別為:招安北部區(qū)域、磚窯灣以北區(qū)域、杏6228井區(qū)域。
[Abstract]:The exploration and development of the Triassic Yanchang formation in Ansai Xingzichuan Oilfield has entered the middle stage. Jurassic Yanan formation is also an important oil-bearing formation in Ordos basin. At present, the reservoir distribution of Yan'an formation in Xingzichuan Oilfield is sporadic. Compared with Yanchang formation, Yanan formation of this oil field has low exploration degree, good reservoir physical property and high single well production, and the process of transforming river and lacustrine delta plain to delta front is not clear. Previous studies show that the reservoir of Yan'an formation is mainly located in Yan7 ~ Yan9 reservoir of lower member of Yan'an formation. Therefore, the sedimentary facies of Yanan formation Yan7 ~ Yan9 reservoir is studied. The distribution of sand bodies during the depositional period from 7 to 9 was carefully characterized, and the oil accumulation law was identified. It is of great strategic significance for the new direction of exploration and development of this oilfield and the increase of reservoir production in the oilfield. The study horizon of this paper is Yan 7, Yan 8 and Yan 9. By means of stratified interpretation of 916 wells in the study area, combined with drilling and logging, Well logging data, analysis of test data and field core observation, field profile observation, application of sedimentology and petroleum geology knowledge, study of horizon sand body, sand to ground ratio, sand body structure, The paleogeomorphology of Fuxian formation was studied according to the characteristics of existing oil wells. The oil accumulation regularity and main controlling factors of Yanan formation Yan7 ~ Yan9 oil formation are summarized and the favorable areas are predicted. The main bodies of Yanan formation are delta front subfacies and northeast small area are delta plain subfacies, the main body of Yan'an formation is delta front subfacies, the main body of Yan'an formation is delta front subfacies, and the northeast small area of Yanan formation is delta plain subfacies. The skeleton sand body is underwater distributary channel sand body, Yan 9 is delta plain subfacies, skeleton sand body is distributary channel sand body. Yan8 has 6 main sand belts in the north, east and south west. The oil bearing horizon of Yan'an formation in the study area is relatively low. By studying the produced oil wells, combining with the paleogeomorphology of Fuxian formation and the single factor level and profile of each study horizon, It is concluded that the main controlling factors of oil and gas enrichment in Yanan formation from Yan'an formation to Yan'an formation are: 1) delta front (or delta plain) subaqueous distributary (or distributary) channel main sand belt (2) paleogeomorphology 3) paleogeomorphology) paleogeomorphology. The mudstone or tight sandstone is sideways occluded in this structure. According to the above factors, the favorable areas of Yan7 ~ Yan9 reservoirs in the study area are predicted, and three favorable areas are selected as follows: the northern area of Zhaoan, the area north of Bian Yaowan, and the area north of Bian Yaowan. Xing6228 well area.
【學位授予單位】：西北大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：P618.13
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本文編號：1599114