本文選題：鄂爾多斯盆地　切入點(diǎn)：長(zhǎng)2油層組　出處：《西安石油大學(xué)》2015年碩士論文

【摘要】：子長(zhǎng)油田余家坪王家灣區(qū)位于陜西省子長(zhǎng)縣內(nèi),構(gòu)造位置處于鄂爾多斯盆地東部的陜北斜坡,長(zhǎng)2油層組是本區(qū)主力產(chǎn)油層。依據(jù)“旋回對(duì)比、分級(jí)控制”的原則,利用自然伽馬測(cè)井曲線的細(xì)微顯示,結(jié)合等時(shí)的概念,將長(zhǎng)2油層組劃分為長(zhǎng)21-1、長(zhǎng)21-2、長(zhǎng)21-3油層小層和長(zhǎng)22油層亞組。并在地層對(duì)比的基礎(chǔ)上,建立了全區(qū)統(tǒng)一的地層構(gòu)造格架。王家灣區(qū)長(zhǎng)21油層總體構(gòu)造格架為一平緩的西傾單斜,局部地區(qū)有鼻狀突起及小高點(diǎn)存在。根據(jù)該區(qū)域沉積背景、砂體平面展布形態(tài)、巖性及電性特征、測(cè)井曲線等分析確定,子長(zhǎng)王家灣區(qū)長(zhǎng)2油層組屬于三角洲平原水上主河道沉積。通過(guò)沉積微相平面展布圖及沉積相剖面圖等進(jìn)一步分析了長(zhǎng)21油層亞組長(zhǎng)21-1、長(zhǎng)21-2、長(zhǎng)21-3各小層及長(zhǎng)22油層亞組的沉積微相類(lèi)型及展布特征。巖心觀察、室內(nèi)巖石薄片鏡下鑒定、分析測(cè)定等表明子長(zhǎng)油田王家灣區(qū)長(zhǎng)2油層組儲(chǔ)層砂巖主要是長(zhǎng)石砂巖,含少量的巖屑長(zhǎng)石砂巖,孔隙類(lèi)型以粒間孔隙為主,其次為溶蝕孔隙。長(zhǎng)2油層組儲(chǔ)層物性較差,為一套低孔-低滲到特低孔-特低滲儲(chǔ)層。通過(guò)儲(chǔ)層的巖性、物性、滲流特征等方面的分析,對(duì)儲(chǔ)層進(jìn)行了評(píng)價(jià),王家灣區(qū)長(zhǎng)2油層段儲(chǔ)層以II、III類(lèi)儲(chǔ)層為主,其次為IV類(lèi)和I類(lèi)儲(chǔ)層。應(yīng)用取心標(biāo)定測(cè)井,建立了儲(chǔ)層屬性參數(shù)的測(cè)井解釋數(shù)學(xué)模型,并依此對(duì)該區(qū)域內(nèi)的井進(jìn)行了測(cè)井資料二次數(shù)字處理,實(shí)現(xiàn)了非取心井儲(chǔ)層參數(shù)的定量求取,為建立儲(chǔ)層地質(zhì)模型提供了井點(diǎn)處的儲(chǔ)層參數(shù)確定值。根據(jù)取心井的分析化驗(yàn)資料,結(jié)合生產(chǎn)實(shí)用性,通過(guò)滲透率劃分流動(dòng)單元,將本區(qū)長(zhǎng)2儲(chǔ)層流動(dòng)單元?jiǎng)澐譃锳、B、C、D四種類(lèi)型,C類(lèi)流動(dòng)單元為質(zhì)量差的儲(chǔ)層,但是為本區(qū)主力流動(dòng)單元。
[Abstract]:The Yujiaping Wangjiawan area of Zichang Oilfield is located in Zichang County, Shaanxi Province. The structural position is located on the northern Shaanxi slope in the eastern part of Ordos Basin. Chang 2 reservoir formation is the main oil producing layer in this area.According to the principle of "cycle contrast, grading control", using the subtle display of natural gamma logging curve and the concept of isochronous, the Chang 2 oil formation is divided into Chang21-1, Chang21-2, Chang21-3 and Chang22 oil layers.On the basis of stratigraphic correlation, a unified stratigraphic framework is established.The overall tectonic framework of Chang21 reservoir in Wangjiawan area is a gentle westward slope with nasal protrusions and small high points in some areas.According to the sedimentary background of the area, the distribution of sand body, lithology and electrical characteristics, logging curves, etc., it is determined that the Chang 2 oil formation in the Wangjiawan area of Zichang belongs to the main channel deposition on the delta plain.The sedimentary microfacies types and distribution characteristics of the sub-formation 21-1, Chang 21-2, Chang 21-3 and Chang22 oil layer subgroup of Chang21 oil reservoir are further analyzed by using the sedimentary microfacies plane distribution map and sedimentary facies profile.The results of core observation, microscopic identification and analysis and determination indicate that the reservoir sandstone of Chang 2 reservoir in Wangjiawan area of Zichang Oilfield is mainly feldspathic sandstone, which contains a small amount of lithic feldspathic sandstone, and the pore type is mainly intergranular pore.The second is the dissolution pore.The reservoir physical property of Chang 2 reservoir is poor, which is a set of reservoirs with low porosity and low permeability to very low porosity and very low permeability.Through the analysis of lithology, physical properties and percolation characteristics, the reservoir is evaluated. The reservoir of Chang2 reservoir in Wangjiawan district is mainly IIPIII reservoir, followed by IV and I reservoirs.By using coring calibration logging, the logging interpretation mathematical model of reservoir attribute parameters is established, and the logging data in this area are processed twice and the reservoir parameters of non-coring wells are obtained quantitatively.The reservoir parameters at well point are provided for the establishment of reservoir geological model.According to the analysis and test data of coring wells and production practicability, the flow units of Chang 2 reservoir in this area are divided into four types of flow units, namely, Agna Bu C type C flow units, which are of poor quality through permeability division.But it is the main flow unit in this area.
【學(xué)位授予單位】：西安石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：P618.13

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本文編號(hào)：1715534