本文選題：巖性識別 + 元素俘獲測井(ECS)��； 參考：《長江大學》2015年碩士論文

【摘要】：在勘探開發(fā)逐漸深入的情況下,人們漸漸開始關(guān)注隱蔽油氣藏的勘探,火成巖復雜油氣藏逐漸被重視,成為了主要的研究儲層。經(jīng)過40年的勘探開發(fā)松遼盆地北部深層氣藏儲層獲得了日產(chǎn)百萬方(無阻流量)高產(chǎn)工業(yè)氣流,呈現(xiàn)出了良好的勘探開發(fā)前景。迄今為止,一般都是使用常規(guī)測井資料和實驗資料,建立模型,編寫程序處理儲層,得出需要的儲層參數(shù),來評價油氣含量。在計算過程中,沒有把測井資料和實驗資料完全地使用,在不同的儲層中,對于解釋模型和評價方法無法較靈活地使用,對于含有兩種及兩種以上礦物的復雜儲層,無法正確地評價,這樣嚴重地影響了對復雜儲層的評價方法的研究。徐家圍子地區(qū)火成巖地層十分復雜,巖性復雜多變,同種巖性的骨架參數(shù)也會有所變化,在儲層骨架含量求取時可能會出現(xiàn)誤差,常規(guī)測井評價方法對于復雜多變的火成巖儲層則不適用。為了加快大慶深層火成巖氣藏的勘探開發(fā),形成的火成巖測井解釋技術(shù)有可靠的理論基礎(chǔ)、有一定深度廣度且體系規(guī)范,就需要研究新的方法。本文首先對徐家圍子地區(qū)火成巖測井響應(yīng)特征進行總結(jié),為巖性識別提供了基礎(chǔ)。其次使用GR-PE、GR-TH交會圖版對徐家圍子地區(qū)火成巖進行巖性識別,效果較好,二者的符合率均達到80%。這兩個圖版可以清晰地將火成巖分為基性巖性區(qū)、中性巖性區(qū)、中性向酸性過渡巖性區(qū)、酸性巖性區(qū)這四個區(qū)塊。然后充分利用了元素俘獲測井(ECS)資料獲得的地層元素含量,骨架的密度、中子孔隙度、俘獲截面、光電吸收截面等的資料,按照CIPW標準礦物法分巖性把火成巖地層中的元素含量轉(zhuǎn)換為了標準礦物含量,計算的骨架密度與巖心密度資料對比,精度為78%。本文分巖性通過斯倫貝謝公式推導出骨架參數(shù),利用骨架模型計算出了地層中各礦物的測井參數(shù)。最后根據(jù)徐家圍子地區(qū)的實際情況在QAPF分類法的基礎(chǔ)上建立了中酸性火成巖的骨架模型：石英、堿性長石、斜長石、暗色礦物和孔隙度。并且利用已求得的礦物骨架參數(shù)值,以及密度、聲波時差、視中子孔隙度、自然伽馬、光電吸收截面五條測井曲線建立超定方程組求解出地層中骨架的礦物含量。通過對松遼盆地的兩口井進行實際處理,計算出的孔隙度和巖心分析孔隙度對比,絕對誤差0.15%,相對誤差為1.73%,效果較好。
[Abstract]:With the gradual development of exploration and development, people begin to pay attention to the exploration of subtle reservoirs, and igneous rock complex reservoirs are gradually paid attention to and become the main research reservoirs. After 40 years of exploration and development of deep gas reservoirs in the northern part of Songliao Basin, a million square (unobstructed flow) high-yield industrial airflow has been obtained, showing a good prospect of exploration and development. Up to now, the conventional logging data and experimental data are generally used to establish models, write programs to process reservoirs, and obtain the required reservoir parameters to evaluate oil and gas content. In the course of calculation, logging data and experimental data are not used completely. In different reservoirs, it is impossible to use more flexibly for interpretation models and evaluation methods, and for complex reservoirs containing two or more kinds of minerals, It is difficult to evaluate correctly, which seriously affects the study of evaluation methods for complex reservoirs. The igneous strata in Xujiaweizi area are very complex, the lithology is complex and changeable, the skeleton parameters of the same lithology will also change, and errors may occur when calculating the skeleton content of the reservoir. Conventional logging evaluation methods are not suitable for complicated igneous reservoirs. In order to speed up the exploration and development of deep igneous gas reservoirs in Daqing, the igneous rock logging interpretation technology formed has a reliable theoretical basis, a certain depth and breadth, and a standardized system, so it is necessary to study new methods. In this paper, the response characteristics of igneous rock logging in Xujiaweizi area are summarized, which provides a basis for lithologic identification. Secondly, the lithologic identification of igneous rocks in Xujiaweizi area is carried out by GR-PEGR-TH rendezvous plate, and the result is good, and the coincidence rate of both is up to 80%. The igneous rocks can be clearly divided into four blocks: the basic lithologic zone, the neutral to acidic lithologic zone and the acidic lithologic zone. Then the data of element content, skeleton density, neutron porosity, capture cross section, photoelectric absorption cross section and so on obtained from element capture logging (ECS) data are fully utilized. According to CIPW standard mineral method the element content in igneous strata is converted to standard mineral content and the calculated skeleton density is compared with the core density data with an accuracy of 78. In this paper, the skeleton parameters are derived by Schlumberger formula and the logging parameters of each mineral in the formation are calculated by using the skeleton model. Finally, according to the actual situation of Xujiaweizi area, based on QAPF classification, the framework model of intermediate acid igneous rock is established: quartz, alkaline feldspar, plagioclase, dark mineral and porosity. Using the obtained values of mineral skeleton parameters, density, acoustic time difference, apparent neutron porosity, natural gamma, photoelectric absorption cross section five log curves are used to establish the overdetermined equations to solve the mineral content of the skeleton in the formation. Through the actual treatment of two wells in Songliao Basin, the calculated porosity and core analysis porosity contrast, absolute error of 0.15, relative error of 1.73, the effect is better.
【學位授予單位】：長江大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P618.13;P631.81

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