本文選題：鄂爾多斯盆地 + 沿河灣區(qū)塊��； 參考：《西北大學(xué)》2015年碩士論文

【摘要】：安塞油田沿河灣區(qū)塊位于陜北地區(qū),其在構(gòu)造分區(qū)屬于陜北斜坡中東部。針對安塞沿河灣區(qū)塊長8儲層研究程度低、認(rèn)識不明確,本次研究以大量前人研究成果為前提,應(yīng)用儲層地質(zhì)學(xué)、石油天然氣地質(zhì)學(xué)的學(xué)科理論和綜合方法,同時采用多樣的測試化驗(yàn)方法及數(shù)據(jù),對安塞油田沿河灣區(qū)塊長8儲層特征進(jìn)行了綜合研究,最終完成有利區(qū)篩選。研究取得了以下重要的結(jié)論及認(rèn)識：(1)沿河灣區(qū)塊長8為三角洲沉積環(huán)境中的三角洲前緣沉積亞相。從長822到長811總體上是一個湖盆逐漸增大的過程,主要發(fā)育7-8條主河道,長812與長821河道較寬；其砂體形態(tài)呈北東—南西向展布,各小層砂體連通性較好。其中長812及長821砂體厚度及規(guī)模較大。(2)儲層巖性主要為灰、深灰色細(xì)粒巖屑長石砂巖,砂巖分選性好,碎屑顆粒為次棱角狀,其中薄膜和孔隙—薄膜為巖石主要膠結(jié)類型。沿河灣區(qū)塊長8儲層孔隙類型主要為殘余粒間孔、次生溶蝕孔隙長石溶孔和部分少量沸石溶孔。綠泥石膠結(jié)強(qiáng)烈,同時碳酸鹽膠結(jié)物含量偏高。(3)沿河灣區(qū)塊長8儲層機(jī)械壓實(shí)、膠結(jié)作用、溶蝕作用較強(qiáng),研究認(rèn)為長8儲層砂巖的成巖演化主體已進(jìn)入中成巖階段A期。(4)通過儲層宏觀特征和微觀特征綜合研究,結(jié)合各種分析化驗(yàn)和測試結(jié)果資料,對沿河灣區(qū)塊長8儲層進(jìn)行綜合分類評價。同時明確沿河灣區(qū)塊長8油藏主要受巖性、物性控制,為典型巖性油氣藏。(5)有效遮擋作用是油氣富集成藏的必要條件之一；同時儲層微觀孔隙結(jié)構(gòu)對儲層含油性有著非常重要的作用。根據(jù)研究區(qū)含油性控制因素,預(yù)測研究區(qū)長8有利區(qū),其中長812、長821儲層較好、優(yōu)勢有利區(qū)范圍大,其將會是沿河灣區(qū)塊下一步增儲主要的考慮層位。
[Abstract]:Ansai oilfield Yanhewan block is located in northern Shaanxi, which belongs to the central and eastern part of northern Shaanxi slope. In view of the low research level and unclear understanding of Chang 8 reservoir in Ansai Yanhe Bay block, this study is based on a large number of previous research results and applies the theories and comprehensive methods of reservoir geology and petroleum and natural gas geology. At the same time, the characteristics of Chang 8 reservoir in Yanhewan block of Ansai Oilfield were studied comprehensively by using various test methods and data, and the favorable area selection was finally completed. The main conclusions are as follows: (1) Chang8 in the Yanhe Bay block is the delta front sedimentary subfacies in the delta sedimentary environment. From Chang822 to Chang811, there are mainly 7-8 main rivers, 812 and 821 are wide, and the sand bodies are distributed in the NE-SW direction, and the sand bodies in each layer have good connectivity. The results show that the sand bodies in Chang822 and Chang811 are gradually enlarged, and there are 7-8 main rivers, 812 and 821 are relatively wide, and the sand bodies are distributed in the NE-SW direction. The lithology of Chang 812 and Chang 821 sand bodies is mainly ash, dark gray fine grained lithic feldspathic sandstone, good sorting of sandstone and subprism of clastic grains, in which thin film and pore film are the main types of rock cementation. The pore types of Chang 8 reservoir in Yanhewan block are mainly residual intergranular pore secondary dissolution pore feldspar dissolution pore and a small amount of zeolite dissolution pore. At the same time, the content of carbonate cementation is on the high side. 3) Chang 8 reservoir in Yanhewan block is mechanically compacted, cemented and dissolved. It is considered that the diagenetic evolution of sandstone in Chang 8 reservoir has entered the stage A of middle diagenesis. (4) through a comprehensive study of the macroscopic and microscopic characteristics of the reservoir, combined with the data of various analysis, laboratory tests and test results, Comprehensive classification and evaluation of Chang 8 reservoir in Yanhewan block are carried out. At the same time, it is clear that Chang 8 reservoir in Yanhewan block is mainly controlled by lithology and physical property, which is one of the necessary conditions for oil and gas accumulation to be effectively occluded. At the same time, the micro-pore structure of reservoir plays an important role in reservoir oil-bearing. According to the control factors of oil content in the study area, it is predicted that Chang8 favorable area in the study area, in which Chang812 and Chang821 have good reservoir and large advantageous area, will be the main consideration for the further increase of reservoir in Yanhewan block.
【學(xué)位授予單位】：西北大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P618.13

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