鄂爾多斯北部十里加汗地區(qū)下石盒子組致密砂巖儲層特征及主控因素
發(fā)布時間：2018-10-24 11:19
【摘要】：杭錦旗地區(qū)是中石化華北局重要的油氣勘探區(qū),是華北分公司近期天然氣增儲上產(chǎn)的重點目標區(qū)。但目前該地區(qū)致密砂巖儲層的綜合特征、主控因素和有效儲層的分布等基礎(chǔ)地質(zhì)規(guī)律還有待進一步揭示。以鄂爾多斯盆地北部杭錦旗地區(qū)十里加汗區(qū)帶為研究區(qū),通過鉆井、測井、地震和分析測試等資料的分析,對研究區(qū)二疊系下石盒子組發(fā)育的致密砂巖儲層基本特征、儲層成巖作用、有效儲層劃分與時空分布及儲層的主控因素等進行了綜合分析。研究揭示,下石盒子組不同層段儲層巖石類型構(gòu)成具有一定的差異性,其中盒1段巖石類型主要為含礫不等粒巖屑砂巖和巖屑石英砂巖,盒2段以細-中粒巖屑砂巖為主,而盒3段主要為粗-中粒巖屑砂巖和石英砂巖。不同層段巖礦特征具有明顯的差異性,盒1段儲集巖成分成熟度略高于盒2段和盒3段;而結(jié)構(gòu)成熟度略低于盒2段和盒3段,主要表現(xiàn)在分選性和磨圓度差和石英含量等方面。盒1段、盒2段及盒3段儲集巖長石含量低,不超過50%,其中盒3段長石含量相對最低;不同層段膠結(jié)特征差異明顯,盒1段膠結(jié)類型多樣,上部鈣質(zhì)膠結(jié)較強,下部略見粘土質(zhì)膠結(jié),主要成分是高嶺石;盒2段以粘土礦物膠結(jié)為主,見少量鈣質(zhì)膠結(jié);盒3段鈣質(zhì)和硅質(zhì)膠結(jié)有所增強,見部分粘土質(zhì)膠結(jié)。儲層破壞性成巖作用主要包括膠結(jié)作用和壓實作用,建設(shè)性成巖作用類型主要包括溶蝕作用、綠泥石早期襯墊、長石高嶺石化以及破裂作用等。研究區(qū)下石盒子組儲層總體致密,以低孔低滲為主,不同層段儲層物性具有差異性,總體上,由盒3段、盒2段、盒1段儲層物性總體變好。儲層孔隙空間類型主要為粒間擴溶孔和溶蝕縫,可見粒間剩余孔、粒內(nèi)溶孔、晶間溶孔、貼粒溶孔、鑄膜孔和成巖縫等。不同層段孔隙類型具有一定差異性,總體上,盒1段以粒間溶孔和溶蝕縫為主,盒2以粒間溶孔和殘余粒間孔為主,盒3以粒間溶孔和微裂縫為主。系統(tǒng)開展了儲層的綜合評價,劃分出Ⅰ類、Ⅱ類和Ⅲ類三類有效儲層類型,有效儲層的鉆遇率具有由盒1段向上總體降低的特點。各段有效儲層主要以Ⅱ類為主,而相對優(yōu)質(zhì)的Ⅰ類儲層由盒2段、盒3段、盒1段發(fā)育程度總體變好。綜合研究揭示了有效儲層的主控因素,提出了層序-古地貌-沉積宏觀控制,巖性-成巖微觀影響的有效儲層主控因素。研究認為,橫向上古地貌控制了儲層的總體發(fā)育程度,地貌的低洼部位儲層相對發(fā)育,垂向上有效儲層具有明顯的層序控制特征,三級層序的LST和HST儲層相對較發(fā)育;巖性控制儲層物性明顯,粗粒砂巖和含礫砂巖物性最好;不同沉積環(huán)境條件下,河道砂體的形態(tài)和厚度控制儲集物性明顯,總體上,箱型河道砂體最為有利,辮狀河道砂體要好于曲流河道砂體,曲流河內(nèi)部的邊灘和河道交匯區(qū)物性較好;在沉積背景基礎(chǔ)上,后期的儲層成巖作用和油氣活動及構(gòu)造破裂作用則對儲層具有一定的輔助作用。綜合分析認為箱型粗粒沉積、三級層序低位體系域和高位體系域是有利的有效儲層發(fā)育部位。
[Abstract]:Hangjinqi area is an important oil and gas exploration area of SINOPEC oil and gas bureau, which is the key target area of recent natural gas enrichment in North China Branch. However, the comprehensive characteristics, main control factors and effective reservoir distribution of dense sandstone reservoirs in this area are also revealed. Based on the analysis of data such as drilling, logging, earthquake and analysis and analysis, the basic characteristics and diagenesis of the dense sandstone reservoir developed in the study area are studied by means of data analysis such as drilling, logging, earthquake and analysis and analysis. The effective reservoir division and the space-time distribution and the main control factors of the reservoir are comprehensively analyzed. The study revealed that the rock types in different layer sections of the lower stone box group have some difference, among which, the type of rock in the 1 section of the box is mainly composed of lithic debris sandstone and lithic quartz sandstone, and the 2 sections of the box are mainly composed of fine-medium grained lithic sandstone. The box 3 is mainly coarse-medium grained lithic sandstone and quartz sandstone. There is a significant difference in the characteristics of rock and ore in different layers, which is slightly higher than that of box 2 and box 3, while the maturity of structure is slightly lower than that of box 2 and box 3, mainly in the aspects of sorting and roundness difference and quartz content. 1 section of box, 2 sections of box and 3 sections of box 3, with low feldspar content, no more than 50%, of which the feldspar content of box 3 is relatively low; the cementing characteristics of different layer sections are obvious, the cementation type of section 1 is diverse, the upper calcareous cementation is strong, and the lower part is slightly seen in clay cementation. The main components are kaolinite; the two sections of the box are cemented with clay minerals; see a small amount of calcareous cementation; and the calcareous and siliceous cements of the box 3 are enhanced. See some clay cements. Destructive diagenesis of reservoir mainly includes cementation and compaction, and constructive diagenesis types mainly include dissolution, early stage liner, feldspar kaolinite and fracture. In the study area, the reservoir is compact, with low porosity and low permeability, and the physical properties of different layer sections are different. In general, the physical properties of the reservoirs in the section of box 3, box 2 and box 1 are generally changed. The pore space types of the reservoir are mainly intergranular expansion and dissolution pores, residual pores between the particles, dissolved pores in the grains, intergranular dissolved pores, patch dissolving holes, cast film holes and forming seams, and the like. The pore types of different layers have some difference. In general, the 1 section of the box is mainly composed of intergranular dissolved pores and dissolution joints, and the box 2 is mainly composed of intergranular dissolved pores and residual interparticle pores, and the box 3 is mainly composed of intergranular dissolved pores and micro cracks. The system has carried out the comprehensive evaluation of reservoir, divided into three types of effective reservoir types of class I, class II and class III, and the drilling meeting rate of effective reservoir has the characteristic of overall decreasing from the segment of box 1. The effective reservoir of each section is mainly composed of class II, while the relatively high quality type I reservoir is composed of 2 sections of box, 3 sections of box and 1 section of box 1. The comprehensive research reveals the main controlling factors of effective reservoir, and puts forward the effective reservoir main control factor of layer sequence-paleogeomorphology-deposit macro-control, lithology-diagenesis micro-influence. According to the study, the horizontal upper paleogeomorphology controls the overall development of the reservoir, the relative development of the reservoir in the reservoir area of the landform, the relative development of the vertical and upward effective reservoir, the relative development of the LST and the HST reservoirs in the tertiary layer sequence, and the obvious physical properties of the lithology control reservoir. The physical properties of coarse-grained sandstone and gravel-containing sandstone are the best; under different sedimentary environments, the shape and thickness of river sand bodies have obvious reservoir physical properties; in general, the box-type river sand bodies are most favorable, and the braided river sand bodies are better than curved river sand bodies. On the basis of sedimentary background, the diagenesis and oil and gas activities and tectonic fracture of the reservoir have a certain auxiliary effect on the reservoir. The comprehensive analysis shows that the box-type coarse grain deposition, the tertiary layer sequence low-order system domain and the high-level system domain are favorable effective reservoir development sites.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：P618.13
本文編號：2291244
[Abstract]:Hangjinqi area is an important oil and gas exploration area of SINOPEC oil and gas bureau, which is the key target area of recent natural gas enrichment in North China Branch. However, the comprehensive characteristics, main control factors and effective reservoir distribution of dense sandstone reservoirs in this area are also revealed. Based on the analysis of data such as drilling, logging, earthquake and analysis and analysis, the basic characteristics and diagenesis of the dense sandstone reservoir developed in the study area are studied by means of data analysis such as drilling, logging, earthquake and analysis and analysis. The effective reservoir division and the space-time distribution and the main control factors of the reservoir are comprehensively analyzed. The study revealed that the rock types in different layer sections of the lower stone box group have some difference, among which, the type of rock in the 1 section of the box is mainly composed of lithic debris sandstone and lithic quartz sandstone, and the 2 sections of the box are mainly composed of fine-medium grained lithic sandstone. The box 3 is mainly coarse-medium grained lithic sandstone and quartz sandstone. There is a significant difference in the characteristics of rock and ore in different layers, which is slightly higher than that of box 2 and box 3, while the maturity of structure is slightly lower than that of box 2 and box 3, mainly in the aspects of sorting and roundness difference and quartz content. 1 section of box, 2 sections of box and 3 sections of box 3, with low feldspar content, no more than 50%, of which the feldspar content of box 3 is relatively low; the cementing characteristics of different layer sections are obvious, the cementation type of section 1 is diverse, the upper calcareous cementation is strong, and the lower part is slightly seen in clay cementation. The main components are kaolinite; the two sections of the box are cemented with clay minerals; see a small amount of calcareous cementation; and the calcareous and siliceous cements of the box 3 are enhanced. See some clay cements. Destructive diagenesis of reservoir mainly includes cementation and compaction, and constructive diagenesis types mainly include dissolution, early stage liner, feldspar kaolinite and fracture. In the study area, the reservoir is compact, with low porosity and low permeability, and the physical properties of different layer sections are different. In general, the physical properties of the reservoirs in the section of box 3, box 2 and box 1 are generally changed. The pore space types of the reservoir are mainly intergranular expansion and dissolution pores, residual pores between the particles, dissolved pores in the grains, intergranular dissolved pores, patch dissolving holes, cast film holes and forming seams, and the like. The pore types of different layers have some difference. In general, the 1 section of the box is mainly composed of intergranular dissolved pores and dissolution joints, and the box 2 is mainly composed of intergranular dissolved pores and residual interparticle pores, and the box 3 is mainly composed of intergranular dissolved pores and micro cracks. The system has carried out the comprehensive evaluation of reservoir, divided into three types of effective reservoir types of class I, class II and class III, and the drilling meeting rate of effective reservoir has the characteristic of overall decreasing from the segment of box 1. The effective reservoir of each section is mainly composed of class II, while the relatively high quality type I reservoir is composed of 2 sections of box, 3 sections of box and 1 section of box 1. The comprehensive research reveals the main controlling factors of effective reservoir, and puts forward the effective reservoir main control factor of layer sequence-paleogeomorphology-deposit macro-control, lithology-diagenesis micro-influence. According to the study, the horizontal upper paleogeomorphology controls the overall development of the reservoir, the relative development of the reservoir in the reservoir area of the landform, the relative development of the vertical and upward effective reservoir, the relative development of the LST and the HST reservoirs in the tertiary layer sequence, and the obvious physical properties of the lithology control reservoir. The physical properties of coarse-grained sandstone and gravel-containing sandstone are the best; under different sedimentary environments, the shape and thickness of river sand bodies have obvious reservoir physical properties; in general, the box-type river sand bodies are most favorable, and the braided river sand bodies are better than curved river sand bodies. On the basis of sedimentary background, the diagenesis and oil and gas activities and tectonic fracture of the reservoir have a certain auxiliary effect on the reservoir. The comprehensive analysis shows that the box-type coarse grain deposition, the tertiary layer sequence low-order system domain and the high-level system domain are favorable effective reservoir development sites.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：P618.13
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