【摘要】：鄂爾多斯盆地陜北斜坡中南部L區(qū)延10儲(chǔ)層是典型的低孔低滲儲(chǔ)層,為了更好地揭示研究區(qū)延10儲(chǔ)層的地質(zhì)特征,預(yù)測(cè)砂體展布、砂頂構(gòu)造及研究?jī)?chǔ)層參數(shù)特征,本文對(duì)該區(qū)進(jìn)行了三維地質(zhì)建模研究。本文以鄂爾多斯盆地陜北斜坡中南部L區(qū)延10地層為研究對(duì)象,以沉積構(gòu)造背景為基礎(chǔ)。首先分析了研究區(qū)的地質(zhì)概況;其次,基于前人研究地質(zhì)資料,結(jié)合測(cè)井和巖心資料對(duì)L區(qū)開展了地層精細(xì)劃分與對(duì)比研究,建立了精細(xì)地層對(duì)比格架,進(jìn)而相繼完成了砂體展布和砂頂構(gòu)造研究、儲(chǔ)層沉積微相研究、“四性關(guān)系”研究和地質(zhì)條件約束下測(cè)井資料二次解釋及儲(chǔ)層非均質(zhì)性研究;最后,對(duì)研究區(qū)開展三維地質(zhì)建模研究。研究表明:L區(qū)延10可以分為延101和延102兩個(gè)小層;研究區(qū)內(nèi)目的層構(gòu)造簡(jiǎn)單,整體呈東高西低特征,局部有低幅鼻狀隆起和低洼;砂體展布方向總體呈北東—西南方向,其中延102砂體較為發(fā)育;研究區(qū)沉積相為辮狀河沉積相,主要沉積微相有心灘,沉積河道和泛濫平原,各小層沉積相之間具有相似性、差異性及繼承性;研究區(qū)延10主要為中粗砂巖為主,其中石英、長(zhǎng)石含量較多,發(fā)育原生孔隙、粒間溶孔、粒內(nèi)溶孔等孔隙,孔隙度一般在9%~16%,滲透率分布范圍在(1.3~3.67)×10-3μm2,屬低孔低滲油藏,并且根據(jù)孔隙度和聲波時(shí)差的正相關(guān)性建立孔隙度解釋模型為:Φ=0.1309Δt-18.473,滲透率與孔隙度的正相關(guān)性建立的滲透率解釋模型為:K=0.0053e0.4534Φ;研究區(qū)的儲(chǔ)層非均質(zhì)性都比較強(qiáng),延101的級(jí)差系數(shù),突進(jìn)系數(shù),變異系數(shù)為23.13,5.64,0.82,延102的系數(shù)為23.06,6.96,0.9。最后,在沉積學(xué)、巖石地層學(xué)、地質(zhì)統(tǒng)計(jì)學(xué)等理論指導(dǎo)下,在靜態(tài)數(shù)據(jù)庫(kù)建立的前提下,應(yīng)用Petrel2009軟件對(duì)L區(qū)進(jìn)行了三維地質(zhì)建模研究,采用序貫指示模擬和序貫高斯模擬法,建立了L區(qū)延10儲(chǔ)層的構(gòu)造模型、相模型、孔隙度模型、滲透率模型、含油飽和度模型,精細(xì)刻畫了儲(chǔ)層構(gòu)造、沉積及屬性的三維地質(zhì)特征,模擬結(jié)果與地質(zhì)認(rèn)識(shí)相符,具有較高的可信性。本研究成果為研究區(qū)下步開發(fā)方案的制定奠定了重要的地質(zhì)基礎(chǔ),有關(guān)研究方法適用于類似的油田地質(zhì)研究。
[Abstract]:In order to better reveal the geological characteristics of Yan 10 reservoir, predict the distribution of sand body, sand roof structure and study reservoir parameters, Yan10 reservoir is a typical low porosity and low permeability reservoir in the central and southern part of Shanbei slope, Ordos Basin, in order to better reveal the geological characteristics of Yan 10 reservoir, predict the distribution of sand body, structure of sand roof and study the characteristics of reservoir parameters. In this paper, three-dimensional geological modeling in this area has been studied. In this paper, Yan 10 strata of L area in the central and southern part of northern Shaanxi slope in Ordos Basin are taken as the research object, and the sedimentary tectonic background is taken as the basis. First, the geological survey of the study area is analyzed. Secondly, based on the geological data of previous studies, combined with logging and core data, the fine stratigraphic division and correlation of L area were carried out, the fine stratigraphic correlation framework was established, and the sand body distribution and sand roof structure were studied successively. Reservoir sedimentary microfacies study, "four-sex relationship" study, logging data secondary interpretation and reservoir heterogeneity study under the constraints of geological conditions; Finally, three-dimensional geological modeling is carried out in the study area. The results show that Y10 of L area can be divided into two sub-layers: Yan 101 and Yan 102, the target layer in the study area is simple in structure, it is characterized by low east high and west low, and has low rhinoid uplift and low depression in local area. The distribution direction of sand body is generally northeast-southwest direction, in which Yen102 sand body is relatively developed; The sedimentary facies in the study area are braided river sedimentary facies, the main sedimentary microfacies are the core beach, the sedimentary channel and the flood plain, and the sedimentary facies of each layer are similar, different and inherited. In the study area Yan 10 is mainly composed of medium coarse sandstone, in which quartz and feldspar are more abundant. The primary pores, intergranular dissolved pores, intragranular dissolved pores, and so on are developed. The porosity is generally at 9 / 16 and the permeability distribution ranges from (1.3 to 3.67) 脳 10 ~ (-3) 渭 m ~ (2), and the distribution range of permeability is (1.3 ~ 3.67) 脳 10 ~ (-3) 渭 m ~ (2). It belongs to low porosity and low permeability reservoir. According to the positive correlation between porosity and acoustic time difference, the porosity interpretation model is established as follows: 桅 = 0.1309 螖 t-18.473.The permeability interpretation model established by positive correlation between permeability and porosity is: K=0.0053e0.4534 桅; The heterogeneity of reservoirs in the study area is relatively strong. The coefficient of differential, advance and variation of Yan101 is 23.1356.64 / 0.82, and the coefficient of Yan102 is 23.06/ 6.96/ 0. Finally, under the guidance of the theories of sedimentology, lithostratigraphy, geostatistics and so on, under the premise of the establishment of static database, the 3D geological modeling of L area was studied by using Petrel2009 software, and the sequential indicator simulation and sequential Gao Si simulation method were used. The structural model, facies model, porosity model, permeability model and oil saturation model of reservoir Yan 10 in L area are established. The 3D geological characteristics of reservoir structure, deposition and attributes are described in detail. The simulation results are consistent with geological understanding. Have high credibility. The results of this study have laid an important geological foundation for the formulation of the next development plan in the study area, and the relevant research methods are suitable for similar oilfield geological studies.
【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
【分類號(hào)】：P618.13

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