本文選題：鄂爾多斯盆地　切入點：彬長區(qū)塊　出處：《長江大學》2017年碩士論文

【摘要】：鄂爾多斯盆地彬長區(qū)塊油氣勘查面積3011.8km2,主力含油層系為長8、長7、長6,已打井近百口,二維地震1662.32km,三維地震837.483km2,目前在長6段、長7段等組段多口井得到工業(yè)油流,但整體勘探開發(fā)水平較低,尚未形成規(guī)模較大的儲量及開發(fā)建產區(qū)。彬長區(qū)塊長6段和長7段油層組主要位于湖相三角洲前緣與淺-半深湖相沉積的過渡地區(qū),雖然砂體發(fā)育面積較廣,但不同期次和不同成因的砂體分布規(guī)律差異較大;長6段和長7段油層組儲層多為低孔、低滲、致密的非常規(guī)儲層,受儲層非均質性等多因素影響,不同井區(qū)間在儲層物性特征、孔隙特征和測井電性特征上存在較大差異,尋找低孔特低滲背景下的相對高滲“甜點”儲層是彬長區(qū)塊目前面臨的主要問題;長6段和長7段油層組油水關系復雜,油層解釋符合率低,試油成果較差;總的說來,彬長區(qū)塊長6段和長7段油層組存在儲層致密,孔喉結構復雜,裂縫發(fā)育,儲集類型多樣,流體性質及分布復雜,油層類型多樣,產能差別大,低效油層多,油井產能遞減快,穩(wěn)產難度大等問題。但總體上彬長區(qū)塊長6、長7油層組砂體發(fā)育,儲層含油性好,油氣資源量大,具有廣闊的勘探開發(fā)遠景,因此開展精細劃分油層組、儲層四性關系研究、進行有效儲層分類、制定儲層的定量評價標準,并在儲層發(fā)育主要控制因素基礎下,進行儲層有利區(qū)域優(yōu)選,為彬長區(qū)塊低孔、超低滲、低豐度、低產油藏勘探開發(fā)提供了技術支撐,是實現(xiàn)彬長區(qū)塊延長組油層段的進一步突破以及快速增儲上產的當務之急。從華北克拉通盆地區(qū)域地質背景、區(qū)域構造演化、區(qū)塊勘探開發(fā)概況及鄰區(qū)的研究成果入手,根據(jù)前人的研究認識,本文充分利用彬長區(qū)塊已有鉆井、測井、錄井和化驗分析等資料,通過對厚度變化特征、地層單元沉積旋回及電性特征對比,對彬長區(qū)塊長6段、長7段和長8段地層進行地層劃分和對比,明確層段地層發(fā)育及展布特征,同時在全區(qū)開展延長組地層劃分和對比,精細劃分油層組;在區(qū)域地層劃分與對比基礎之上,結合已有的沉積相研究,通過巖心觀察與薄片分析,結合露頭資料和測井分析資料,總結彬長區(qū)塊長6與長7主要砂體的巖性特征、構造特征、粒序特征、剖面結構以及測井相特征,在對彬長區(qū)塊取心段沉積微相研究的基礎上,結合測井曲線,對單井長6與長7段的沉積微相開展研究,同時結合彬長區(qū)塊外圍研究成果及區(qū)域沉積背景,進行沉積微相的劃分及相標志的建立,明確有利沉積微相的展布特征;開展各油層組的巖性、沉積特征、剖面結構以及測井相特征研究,側重對儲層的巖石學、孔隙特征、物性特征、儲層孔隙結構特征、沉積相等方面開展研究,結合薄片觀察、壓汞曲線和描述,對彬長區(qū)塊基質孔隙發(fā)育的因素進行分析,進行有效儲層的識別和分類,將彬長區(qū)塊長6段和長7段復雜砂巖儲層各劃分出2類有效儲層類型;以儲層巖性、物性、電性和含油性等四性關系研究為基礎,尋找出典型井的電性特征及含油性特征,開展典型井巖性、物性、電性和含油性等四性分析;研究儲層物性與粒度、成分、雜基含量等巖石學參數(shù)之間的關系,研究不同成因砂體的儲集物性特征,研究不同成因砂體的成巖演化路徑及各成巖作用強度,確定儲層發(fā)育的主要控制因素;在儲層發(fā)育控制因素分析的基礎上,根據(jù)沉積相、砂體厚度、儲層類型等,進行彬長區(qū)塊儲層分類評價,研究不同產能段的儲層特征,根據(jù)產能進行儲層物性下限研究,并對儲層進行相應的分類評價,在儲層評價標準的基礎上,對長6段和長7段儲層開展平面上綜合評價,預測和優(yōu)選了彬長區(qū)塊長6段和長7段儲層的有利儲集相帶。成果如下:(1)在掌握彬長區(qū)塊已完鉆的近百口井資料的基礎上,利用沉積旋回結合厚度漸變原則,對彬長區(qū)塊的近百口井延長組小層進行了重新對比劃分,將目的層長6細分為長61、長62和長63三層,長7細分為長71、長72和長73三層,將長8細分為長81和長82兩層。(2)彬長區(qū)塊主要沉積一套與砂質碎屑流為主、濁流為輔的深水重力流沉積體系,碎屑流砂體單期分布面積較小,但厚度大,發(fā)育期次多,常常多期疊置形成厚層的砂巖,是長6段和長7段的主力砂體。(3)結合壓汞曲線,薄片觀察,儲層的物性、孔隙特征以及孔隙結構特征,辨別出彬長區(qū)塊長6段和長7段各2類有效儲層。(4)在儲層巖性、物性、電性和含油性等四性關系研究的基礎上,結合優(yōu)質儲層發(fā)育的控制因素,開展儲層評價研究,根據(jù)儲層評價并利用此標準優(yōu)選出長6段和長7段的二類油氣有利儲集區(qū)帶,其中一類為砂體厚度大且連片發(fā)育的區(qū)域,另一類為砂體厚度雖較小且局部裂縫發(fā)育的區(qū)域。
[Abstract]:The area of 3011.8km2 oil and gas exploration in Binchang block Erdos basin, the main oil-bearing series for long 8, long 7, long 6, wells has nearly 100 mouth, 2D seismic 1662.32km, 3D seismic 837.483km2, currently in the long 6, long industrial oil flow of 7 sections of group wells, but the overall level of exploration and development low, has not yet formed a large scale reserves and development. Construction area transition area Binchang blocks long 6 and long 7 reservoir group is mainly located in the lacustrine delta front and shallow semi deep lake facies, although the development of sand body wide area, but in different periods and different causes of the distribution of sand body rules are different; Chang 6 and Chang 7 reservoir is of low porosity, low permeability, unconventional tight reservoir, the reservoir heterogeneity and other factors, different wells in the range of the characteristics of reservoir, there is a big difference between the pore characteristics and logging electrical characteristics, find Kong Te low permeability background The relatively high permeability reservoir under the "dessert" is the main problem currently facing the Binchang block; Chang 6 and Chang 7 reservoir group complex relationship between oil and water, reservoir interpretation coincidence rate, test result is poor; in general, Binchang block of Chang 6 and Chang 7 member of Yanchang Formation reservoir is tight, complex pore structure, fracture, reservoir types, fluid properties and distribution of complex reservoir types, the capacity difference is big, inefficient oil, oil production decline fast, stable problem is difficult. But on the whole bin long block length 6, Chang 7 oil-bearing sandbody, reservoir well, the amount of oil and gas resources, has broad prospects for exploration and development, it is necessary to carry out fine division of reservoir group, studying reservoir four relations, effective reservoir classification, quantitative evaluation standard of reservoir, and the main control factors of reservoir development in the foundation, the reservoir favorable zone optimization for long bin area A low porosity, low permeability, low abundance, and provides technical support for exploration and development of reservoir is low, achieve further breakthroughs in Binchang block reservoir of Yanchang Formation and rapid production. Through a pressing matter of the moment of regional geological background from the North China Craton Basin, tectonic evolution, research and development of exploration blocks and adjacent areas of understanding on the basis of previous research, this paper makes full use of the existing Binchang Block drilling, logging, logging and analytical data, based on the thickness variation, stratigraphic sedimentary cycle and the electrical characteristic of Binchang block length contrast, paragraph 6, of the stratigraphic division and correlation of Chang 7 and Chang 8 formation, development and clear the distribution of stratigraphic layers, and carry out the Yanchang formation division and correlation in the whole area, fine division of reservoir group; on the basis of regional stratigraphic division and correlation, combined with the existing phase of deposition, through the core Observation and analysis of thin section, combining outcrop data and logging data, summarized lithology, Binchang block 6 and 7 main sand body structure, grain sequence characteristics, section structure and logging facies, based on coring section of Binchang block study of sedimentary microfacies, combined with logging curves. The deposition of single well long 6 and long 7 microfacies research, combined with the research results of Binchang block and peripheral regional sedimentary background, establish sedimentary microfacies and facies division, clear sedimentary microfacies distribution characteristics; carry out of each reservoir rock, sedimentary characteristics, research section structure well logging facies, focusing on reservoir petrology, pore characteristics, physical properties, pore structure characteristics, sedimentary facies research, combined with thin section observation, mercury injection curves and description of factors of pore development in Binchang block matrix analysis, The identification and classification of effective reservoir, will block Binchang Chang 6 and Chang 7 section of the complex sandstone reservoir are divided into 2 types of effective reservoir types; the reservoir lithology, physical property, electrical property and oiliness of four as the foundation, and the oil-bearing characteristic electrical characteristics for origin well, to carry out the typical well lithology, physical property and oiliness, analysis of four of electricity; and size, reservoir of components, the relationship between the content of matrix and petrological parameters, physical characteristics research of different genetic sandstone reservoir, diagenesis and diagenetic intensity of each path study on various sandbodies, determining the controlling factors of reservoir development; analyzing the controlling factors of development in the reservoir, according to the sedimentary facies, sand body thickness, reservoir type, reservoir of Binchang classification evaluation, reservoir characteristics of different segments of the production capacity, according to the reservoir the lower limit of 鐮旂┒,騫跺鍌ㄥ眰榪涜鐩稿簲鐨勫垎綾昏瘎浠，

本文編號：1655505