發(fā)布時間：2018-05-12 05:02

  本文選題：準中1區(qū) + 三工河組　； 參考：《中國石油大學(華東)》2015年碩士論文

【摘要】：準中1區(qū)主體位于準噶爾盆地腹部盆1井西凹陷,南部處于昌吉凹陷北斜坡,構造上為一南傾單斜坡,自北向南分布沙窩地、莫西莊和征沙村三個區(qū)塊,斷裂體系和正向構造不發(fā)育。研究層位侏羅系三工河組以發(fā)育大套穩(wěn)定分布的三角洲前緣砂體為特征,是準中1區(qū)油氣勘探主要目的層系,近期勘探成果顯示了良好的油氣勘探潛力,但由于儲層特征不明確,多口探井在目的層鉆遇干層或試油產液量變化幅度大,因此針對三工河組低滲透儲層,系統(tǒng)開展儲層特征研究,明確有效儲層發(fā)育的控制因素及有效儲層展布特征對于研究區(qū)油氣勘探具有重要意義。因此,本論文綜合運用巖心資料、測錄井資料及鑄體薄片鑒定、SEM及物性測試等分析化驗資料,對研究區(qū)三工河組低滲透儲層巖石學特征、成巖特征、儲集特征、有效儲層物性下限、有效儲層控制因素及有效儲層展布特征等進了系統(tǒng)性研究,取得了以下成果和認識:(1)準中1區(qū)三工河組低滲透儲層巖性以細砂巖、中砂巖和粗砂巖為主,其次為粉砂巖,礫巖和砂礫巖含量較低,巖石成分類型主要為長石質巖屑砂巖;儲層成巖演化程度低,主要處于中成巖A1亞期,壓實作用中等-強,膠結作用多樣,以高嶺石膠結發(fā)育普遍,對儲層低滲具有重要影響,溶解作用普遍較弱,發(fā)育弱壓實弱溶解弱膠結成巖相、中壓實弱溶解弱膠結成巖相、中壓實弱溶解高嶺石中強膠結成巖相等8種主要的成巖相類型;儲層物性主要顯示低孔低滲特征,儲集空間以原生孔為主,根據Pd和Pc50將儲層孔喉結構劃分為三大類六小類;由于構造位置和儲層埋深的較大差異,沙窩地、莫西莊和征沙村三工河組儲層壓實強度、物性特征和孔喉結構特征差異明顯。(2)綜合利用分布函數曲線法、試油法、測試法等計算了三工河組有效儲層滲透率下限,并以孔喉結構為約束,計算了不同孔喉結構類型儲層孔隙度下限;以孔隙度差值和滲透率差值為主要參數,分析了三工河組有效儲層主控因素,認為有效儲層發(fā)育主要受巖相和成巖相控制,沉積微相和地層壓力等因素對有效儲層發(fā)育影響不大。(3)根據有效儲層主控因素-巖相和成巖相的明顯差異,并結合儲層物性及試油資料等,對準中1區(qū)三工河組二段砂巖儲層進行了分類評價,將其分為Ⅰ類、Ⅱ1類、Ⅱ2類、Ⅲ類和Ⅳ類,并根據巖相-成巖相測井識別成果,預測了各類有效儲層平面展布特征,認為沙窩地和莫西莊北部地區(qū)1~4砂組主要為Ⅰ類儲層發(fā)育區(qū),5砂組主要發(fā)育Ⅱ2類儲層;莫西莊地區(qū)1~4砂組主要為Ⅱ1類儲層,5砂組發(fā)育Ⅲ類儲層,征沙村地區(qū)則主要發(fā)育Ⅳ類儲層;6砂組發(fā)育Ⅳ類儲層。
[Abstract]:The main body of area 1 is located in the west sag of basin 1 in the abdomen of Junggar basin, and the north slope of Changji sag is located in the south. The structure is a single slope with a southern dip. The Shawo area distributes from north to south, and three blocks, Moxizhuang and Zhenshacun, are located. Fault systems and forward structures are not developed. The Sangonghe formation of Jurassic strata is characterized by the development of a large set of stable delta front sand bodies, which is the main target system for oil and gas exploration in area Qizhong 1. The recent exploration results show a good potential for oil and gas exploration. However, because of the unclear reservoir characteristics and the large variation of drilling dry layer or oil test fluid production in the target formation, the research on reservoir characteristics is carried out systematically for the low permeability reservoir of Sangonghe formation. It is important for oil and gas exploration to identify the controlling factors of effective reservoir development and the distribution characteristics of effective reservoir. Therefore, this paper synthetically uses core data, logging data, casting thin section identification, SEM and physical property test data to analyze the petrological characteristics, diagenetic characteristics and reservoir characteristics of low permeability reservoirs in Sangonghe formation, the study area. The lower limit of physical properties of effective reservoir, the controlling factors of effective reservoir and the distribution characteristics of effective reservoir have been systematically studied, and the following results and understandings have been obtained. The lithology of low permeability reservoirs of Sangonghe formation in quasi middle and first district is mainly composed of fine sandstone, medium sandstone and coarse sandstone. The second is siltstone, the content of conglomerate and sandy gravel is low, the rock composition type is mainly feldspathic lithic sandstone, the diagenetic evolution degree of reservoir is low, mainly in the A1 substage of middle diagenesis, the compaction is medium to strong, and the cementation is various. The kaolinite cementation is widely developed, which has an important influence on the low permeability of the reservoir. The dissolution is generally weak, the weak compaction is weak to form the lithofacies, and the medium compaction is weak to dissolve the weak glue to form the lithofacies. There are eight main diagenetic facies types of medium compacted weakly dissolved kaolinite and strong cemented rocks, the physical properties of reservoir mainly show low porosity and low permeability, and the reservoir space is dominated by primary pore. According to PD and Pc50, the pore throat structure of the reservoir is divided into three categories and six subclasses. Because of the great difference of structure location and reservoir buried depth, there are obvious differences in compaction strength, physical properties and pore throat structure characteristics between Shawodi, Moxizhuang and Zhenshacun Sangonghe formation reservoirs. The effective reservoir permeability limit of Sangonghe formation is calculated by the test method, and the lower limit of porosity of different pore throat structure types is calculated with pore throat structure as the constraint, and the porosity difference and permeability difference are taken as the main parameters. The main controlling factors of effective reservoir in Sangonghe formation are analyzed. It is considered that the development of effective reservoir is mainly controlled by lithofacies and diagenetic facies. The factors such as sedimentary microfacies and formation pressure have little influence on the development of effective reservoir. (3) according to the obvious differences between the main controlling factors of effective reservoir lithofacies and diagenetic facies, combined with reservoir physical properties and oil testing data, etc. The sandstone reservoirs of the second member of the Sangonghe formation in Zhong1 area are classified and evaluated, and they are classified into 鈪，

本文編號：1877215