【摘要】：近年來頁巖油氣研究越來越受到關(guān)注,泥頁巖生儲(chǔ)蓋一體,導(dǎo)致巖性、物性等特征復(fù)雜。本文以蘇北盆地阜二段泥頁巖儲(chǔ)層以及西湖凹陷中央反轉(zhuǎn)構(gòu)造帶花港組和平湖組泥頁巖蓋層作為研究對(duì)象,在基礎(chǔ)地質(zhì)研究的基礎(chǔ)上,針對(duì)蘇北盆地泥頁巖儲(chǔ)層、西湖凹陷泥巖蓋層兩個(gè)研究目的層段,利用測(cè)井資料開展儲(chǔ)、蓋層性質(zhì)的測(cè)井評(píng)價(jià)。針對(duì)泥頁巖儲(chǔ)層,首先在對(duì)測(cè)井資料標(biāo)準(zhǔn)化以及巖心深度歸位的基礎(chǔ)上,依據(jù)“礦物—電性”關(guān)系建立巖石中的粘土礦物、長(zhǎng)英質(zhì)礦物和碳酸鹽礦物與相應(yīng)敏感測(cè)井曲線間關(guān)系,并利用△logR方法對(duì)泥巖段有機(jī)碳含量進(jìn)行計(jì)算,從而對(duì)泥頁巖儲(chǔ)層巖相進(jìn)行識(shí)別劃分;同時(shí)對(duì)物性參數(shù)、巖石力學(xué)參數(shù)等泥頁巖儲(chǔ)層主要評(píng)價(jià)參數(shù)進(jìn)行測(cè)井模型的建立,從而實(shí)現(xiàn)各單井的測(cè)井解釋;最后在單井解釋的基礎(chǔ)上,根據(jù)其礦物組成、TOC含量、裂縫發(fā)育程度、物性特征、泥巖厚度等參數(shù)的平面展布特征,在地質(zhì)研究的基礎(chǔ)上采用多因素疊加、地質(zhì)類比等方法進(jìn)行測(cè)井評(píng)價(jià)。研究認(rèn)為有利巖相厚度越大,脆性系數(shù)較高,物性較好的區(qū)域?yàn)槟囗搸r儲(chǔ)層有利區(qū)域。對(duì)于泥頁巖蓋層,研究區(qū)巖石組分單元相對(duì)簡(jiǎn)單,利用Vsh公式在求取泥質(zhì)含量的基礎(chǔ)上,建立了無機(jī)礦物含量測(cè)井解釋模型,并結(jié)合測(cè)井相的定性識(shí)別,利用“定量計(jì)算+定性識(shí)別”的方法對(duì)研究區(qū)巖相進(jìn)行劃分;然后利用測(cè)井資料完成了泥頁巖蓋層突破壓力、物性參數(shù)、巖石力學(xué)參數(shù)等測(cè)井模型的建立,進(jìn)而完成各單井的測(cè)井解釋;在此基礎(chǔ)上針對(duì)海上油田范圍大且井少的特點(diǎn),本文采用定量與定性相結(jié)合的方法;定量評(píng)價(jià)主要側(cè)重于對(duì)蓋層微觀封閉能力的分析和總結(jié),即利用測(cè)井解釋的突破壓力、孔隙度、滲透率、TOC含量等微觀封閉性參數(shù)判斷物性封閉、超壓封閉、烴濃度封閉在該區(qū)的封閉作用。定性評(píng)價(jià)則側(cè)重于對(duì)宏觀地質(zhì)條件的分析,如蓋層厚度、成巖階段和巖相展布等,最終實(shí)現(xiàn)對(duì)蓋層的測(cè)井評(píng)價(jià)。
[Abstract]:In recent years, more and more attention has been paid to the study of shale oil and gas. In this paper, the mud shale reservoirs of the second member of Fu member in Subei Basin and the shale cap of Huagang and Pinghu formations in the central inversion structural belt of Xihu depression are taken as the research objects. On the basis of the basic geological research, the shale reservoirs in Subei Basin are studied. The logging data are used to evaluate the properties of reservoir and caprock in two study target layers of mudstone caprock in Xihu sag. Aiming at shale reservoir, the clay minerals in the rock are established according to the relation of "Mineralogy and electricity" on the basis of the standardization of logging data and the return of core depth. The relationship between feldspar minerals and carbonate minerals and the corresponding sensitive logging curves, and the calculation of organic carbon content in mudstone formation by logR method are used to identify and divide the lithofacies of shale reservoir, and the physical parameters are also given. The main evaluation parameters of shale reservoir, such as rock mechanics parameters, are established to realize the logging interpretation of each single well, and finally, according to its mineral composition, TOC content, fracture development degree and physical properties, the logging interpretation of each single well is realized. On the basis of geological research, the logging evaluation of mudstone thickness and other parameters is carried out by means of multi-factor superposition and geological analogy. It is considered that the area with higher favorable lithofacies thickness, higher brittleness coefficient and better physical properties is the favorable area for shale reservoir. For the shale caprock, the rock component unit in the study area is relatively simple. Based on the Vsh formula, a log interpretation model of inorganic mineral content is established, and the logging facies are identified qualitatively. The method of "quantitative calculation and qualitative identification" is used to divide the lithofacies in the study area, and then the logging model of shale cap rock breakthrough pressure, physical property parameter and rock mechanics parameter is established by using logging data. Then, the logging interpretation of each single well is completed. On this basis, in view of the characteristics of large scale and few wells in offshore oil fields, this paper adopts the combination of quantitative and qualitative methods, and the quantitative evaluation mainly focuses on the analysis and summary of the microcosmic sealing ability of caprock. That is, the microcosmic sealing parameters such as breakthrough pressure, porosity, permeability and TOC content of log interpretation are used to judge the sealing effect of physical property, overpressure and hydrocarbon concentration in this area. The qualitative evaluation focuses on the analysis of macroscopic geological conditions, such as the thickness of caprock, diagenesis stage and distribution of lithofacies, and finally realizes the logging evaluation of caprock.
【學(xué)位授予單位】：中國(guó)石油大學(xué)(華東)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.13;P631.81

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