本文選題：遼中凹陷南洼 + 東二段��； 參考：《成都理工大學(xué)》2017年碩士論文

【摘要】：遼東灣地區(qū)是渤海地區(qū)最重要的產(chǎn)油氣區(qū)之一,具有非常大的勘探潛力。近年來的勘探開發(fā)成果表明,遼中凹陷南洼東營(yíng)組和沙河街組具有良好的油氣成藏條件,具備形成大中型油氣田的基礎(chǔ),但現(xiàn)有的勘探程度相對(duì)較低,研究基礎(chǔ)較為薄弱,其中,有關(guān)有利儲(chǔ)層控制因素及形成機(jī)理的研究認(rèn)識(shí)不夠明確,是制約該區(qū)進(jìn)一步油氣勘探的重要原因。本論文在前人研究的基礎(chǔ)上,利用鉆井資料、測(cè)井資料和巖心觀察、薄片鑒定等方法和手段,在以下幾個(gè)方面取得了一定的認(rèn)識(shí):(1)確定了遼中凹陷南洼東營(yíng)組二段(以下簡(jiǎn)稱“東二段”)儲(chǔ)層形成沉積環(huán)境主要為辮狀河三角洲和湖泊相;砂層主要發(fā)育在以下沉積微相中:水下分流河道、河口壩、遠(yuǎn)砂壩等。(2)進(jìn)行巖石學(xué)特征分析,確定了巖石類型、成巖作用類型和成巖階段劃分,主要巖石類型為長(zhǎng)石砂巖和巖屑長(zhǎng)石砂巖;主要成巖作用為壓實(shí)作用、膠結(jié)作用、溶蝕作用和交代作用等;成巖階段處于早成巖B和中成巖A期。(3)研究區(qū)孔隙類型主要以次生溶蝕孔隙和原生粒間孔為主,溶蝕孔隙中長(zhǎng)石溶蝕最為發(fā)育,其次有膠結(jié)物和雜基的溶蝕擴(kuò)大孔。根據(jù)毛管壓力曲線特征,把研究區(qū)的孔隙劃分為四種類型:Ⅰ類、Ⅱ類、Ⅲ類和Ⅳ類。(4)有利儲(chǔ)層發(fā)育控制因素主要有沉積因素、成巖因素和埋深因素,綜合研究區(qū)東二段沉積微相平面圖,埋深圖以及生烴強(qiáng)度平面圖三者進(jìn)行預(yù)測(cè)有利儲(chǔ)層分布。本文通過儲(chǔ)層的沉積相特征、儲(chǔ)層巖石學(xué)特征、儲(chǔ)層成巖作用特征和儲(chǔ)層物性特征等內(nèi)容的研究,對(duì)遼中凹陷南洼東二段儲(chǔ)層進(jìn)行了較為全面的分析,明確了控制有利儲(chǔ)層的因素,并對(duì)研究區(qū)東營(yíng)組有利儲(chǔ)集區(qū)帶進(jìn)行綜合評(píng)價(jià),建立優(yōu)質(zhì)儲(chǔ)層預(yù)測(cè)模型,對(duì)優(yōu)質(zhì)儲(chǔ)層展布進(jìn)行預(yù)測(cè),為該區(qū)下一步勘探和開發(fā)提供有力依據(jù)。
[Abstract]:The Liaodong Bay area is one of the most important oil and gas producing areas in the Bohai Sea area and has great exploration potential. The results of exploration and development in recent years show that the Dongying formation and Shahejie formation of Nanwa in Liaozhong depression have good oil and gas reservoir forming conditions and have the foundation to form large and medium-sized oil and gas fields, but the existing exploration degree is relatively low, and the research foundation is relatively weak. Among them, the study of favorable reservoir control factors and formation mechanism is not clear, which is an important reason to restrict the further oil and gas exploration in this area. On the basis of previous studies, this paper uses drilling data, logging data and core observation, thin slice identification and other methods and means. In the following several aspects, a certain understanding is obtained: 1) the reservoir formation of the Dongying formation of Nanwa in central Liaoning sag is mainly composed of braided river deltas and lacustrine facies, the sedimentary environment of which is mainly braided river delta and lacustrine facies. Sand layer is mainly developed in the following sedimentary microfacies: underwater distributary channel, estuarine dam, distant sand dam, etc.) the petrological characteristics are analyzed, and the rock types, diagenesis types and diagenetic stages are determined. The main rock types are feldspathic sandstone and lithic feldspar sandstone, the main diagenesis is compaction, cementation, dissolution and metasomatism. In the diagenetic stage, the main pore types are mainly secondary dissolution pore and primary intergranular pore, the feldspar dissolution is the most developed in the dissolution pore, the second is the cementation and the dissolution expansion pore of the complex base in the study area of diagenetic stage B and the middle diagenetic stage A) the main pore types are mainly secondary dissolution pore and primary intergranular pore, and the feldspar dissolution is most developed in the dissolution pore. According to the characteristics of capillary pressure curve, the porosity in the study area is divided into four types: class 鈪，

本文編號(hào)：1971442