本文選題：馬5亞段 + 儲層特征　； 參考：《成都理工大學(xué)》2015年碩士論文

【摘要】：本文以蘇里格東奧陶系馬五5亞段儲層為研究對象,利用沉積學(xué)、碳酸鹽巖儲層地質(zhì)學(xué)、油層物理學(xué)及儲層沉積學(xué)的基本原理和方法并結(jié)合測井資料、鑄體薄片、掃描電鏡、陰極發(fā)光及壓汞參數(shù)等資料,對馬五5亞段的巖石學(xué)特征、儲集空間特征、成巖作用、儲層孔滲關(guān)系、儲層分類及儲層控制因素進行了深入的研究。馬5亞段沉積主要處于陸表海臺地相,以干旱的潮坪環(huán)境為主,該區(qū)的沉積相可劃分為3大亞相、8個次級沉積亞相類,13種巖性類型。馬五5亞段巖石類型多樣,通過薄片鑒定以及巖心分析,研究區(qū)的碳酸鹽巖主要包括顆�；�?guī)r、殘余粒屑白云巖、晶粒白云巖等,其中晶粒白云巖儲集性能最好、殘余結(jié)構(gòu)白云巖儲集性能較好、灰?guī)r和角礫白云巖儲集性能最差。馬五5亞中主要的儲集空間為次生孔隙中的晶間孔和溶洞、縫,而其他次生孔隙出現(xiàn)比較少。以中晶、細晶和粉晶白云巖儲層發(fā)育最好,物性、孔隙結(jié)構(gòu)和壓汞參數(shù)都最好,以晶間孔為主要儲集空間。通過對區(qū)內(nèi)鉆井巖心及薄片資料進行觀察和研究,并利用掃描電鏡、陰極發(fā)光和X衍射分析等測試分析手段,對研究區(qū)主要成巖作用類型進行了詳細研究,認為本研究區(qū)馬五5亞段的主要成巖作用有:白云石化作用、去膏化作用和去白云石化作用、壓實和壓溶作用、硅化作用、溶蝕作用、充填作用、重結(jié)晶作用和黃鐵礦化作用等。成巖作用對儲集空間有著不同的影響,研究表明準同生白云化作用未形成有利孔隙,埋藏白云化作用形成的晶間孔構(gòu)成了研究層位中的重要儲集空間。表生溶蝕作用對研究層位中孔縫的增加非常重要,而埋藏期溶蝕作用由于發(fā)生在封閉體系下溶蝕空間發(fā)育有限。利用巖石薄片,巖石鑄體薄片,壓汞曲線,相滲曲線等資料,對目的層儲層進行深入分析,得出在各類巖性中,細-中晶白云巖的連通孔喉半徑最大、壓汞參數(shù)最好,微晶白云巖和微晶灰?guī)r最差。根據(jù)毛細管壓力曲線和孔隙結(jié)構(gòu)參數(shù)特征和儲層孔隙結(jié)構(gòu)特征可以將儲層分為4類:Ⅰ類儲層、Ⅱ類儲層、Ⅲ類儲層和Ⅳ類儲層。孔隙度大于5%的儲層為I類儲層,屬于好儲層,孔隙度在2~5%為II類儲層,孔隙度在0.5~2%為III類儲層,孔隙度小于0.5%為IV類儲層。研究區(qū)蘇東37-58井中以I、II類儲層為主;蘇東39-62C1和蘇東40-66井主要發(fā)育III類儲層。儲層受沉積微相、構(gòu)造作用和白云巖分布的控制,后期構(gòu)造作用形成的鼻狀構(gòu)造有利于氣藏成藏。
[Abstract]:In this paper, the reservoir of Ma-5 submember of the Suliglo Ordovician system is taken as the research object, and the basic principles and methods of sedimentology, carbonate reservoir geology, reservoir physics and reservoir sedimentology, combined with logging data, casting thin sheet, scanning electron microscope, are used in this paper. Based on the data of cathodoluminescence and mercury injection parameters, the petrological characteristics, reservoir spatial characteristics, diagenesis, reservoir porosity and permeability, reservoir classification and reservoir control factors of Ma-Wu submember are studied. The deposits of the Ma 5 submember are mainly located in the surface sea platform facies, mainly in the arid tidal flat environment. The sedimentary facies in this area can be divided into 3 subfacies, and 8 secondary sedimentary subfacies are of 13 lithologic types. The carbonate rocks in the study area mainly include granular limestone, residual grain dolomite and grain dolomite, among which the grain dolomite has the best reservoir properties. The reservoir performance of residual dolomite is better than that of limestone and breccia dolomite. The main reservoir spaces in Ma Wu 5 are intergranular pores and caverns in secondary pores, while other secondary pores appear less. The mesocrystalline, fine-grained and powdered dolomite reservoirs have the best development, physical properties, pore structure and mercury injection parameters, with intergranular pores as the main reservoir space. The main diagenesis types in the study area were studied by means of scanning electron microscope, catholuminescence and X-ray diffraction. It is considered that the main diagenesis of Ma-Wu submember in this study area are dolomitization, demoulding and dedolomitization, compaction and pressure-dissolution, silicification, dissolution, filling, etc. Recrystallization and pyrite formation. Diagenesis has different effects on the reservoir space. The study shows that the quasi-syngenic dolomitization does not form favorable pores and the intergranular pore formed by buried dolomitization constitutes an important reservoir space in the study horizon. The supergene dissolution is very important for the study of the increase of pore fractures in the horizon, but the dissolution in the burial period is limited because of the limited development of the dissolution space under the closed system. Based on the data of rock slice, rock cast thin piece, mercury injection curve and phase permeation curve, the reservoir of the target layer is analyzed in depth. It is concluded that among all kinds of lithology, the connected pore throat radius of fine to medium crystalline dolomite is the largest, and the mercury injection parameter is the best. Microcrystalline dolomite and microcrystalline limestone are the worst. According to capillary pressure curve, pore structure parameters and pore structure characteristics, the reservoir can be divided into four categories: type 鈪，

本文編號：2095053