胡尖山油田長9儲(chǔ)層特征及含油性控制因素研究
發(fā)布時(shí)間：2019-05-23 04:13
【摘要】：胡尖山地區(qū)位于鄂爾多斯盆地伊陜斜坡的中西部,也是整個(gè)鄂爾多斯的重要油氣產(chǎn)區(qū)之一。區(qū)內(nèi)含油層系較多,為長8、長7、長6、長3及侏羅系多油層復(fù)合含油區(qū),建產(chǎn)規(guī)模逐漸擴(kuò)大,顯示了胡尖山地區(qū)良好的勘探前景。胡尖山長9為近年來新發(fā)現(xiàn)層系,深入研究胡尖山地區(qū)長9儲(chǔ)層特征及含油性控制因素,對(duì)該區(qū)層下一步的勘探開發(fā)具有重要的指導(dǎo)意義。本次研究是在前人研究的基礎(chǔ)之上,結(jié)合巖心資料、測井資料、分析測試資料以及試油資料,以沉積巖石學(xué)、測井地質(zhì)學(xué)、石油地質(zhì)學(xué)等學(xué)科理論為指導(dǎo),綜合區(qū)域地質(zhì)背景,對(duì)胡尖山地區(qū)長9段的沉積相、儲(chǔ)層地質(zhì)特征以及含油性控制因素等進(jìn)行了研究,并在此基礎(chǔ)上提出產(chǎn)建有利區(qū)帶。研究認(rèn)為,胡尖山地區(qū)長9層位構(gòu)造趨于緩和,數(shù)條近東西向的低幅鼻隆狀次一級(jí)構(gòu)造在單斜構(gòu)造背景下良好的發(fā)育；其自北向南由三角洲平原亞相,順河道走向過渡為水下還原性相態(tài),即三角洲前緣亞相構(gòu)成了研究區(qū)長9儲(chǔ)層的三角洲沉積相的亞相態(tài),分流河道、水下分流河道、陸上天然堤、水下天然堤、分流間灣、沼澤等沉積微相等可通過多種表征參數(shù)細(xì)化確定下來；沉積演化多樣�；野咨�、灰綠色中-細(xì)粒長石砂巖為本區(qū)長9層砂巖的主要組成,綠泥石、硅質(zhì)以及鐵方解石等多種礦物組成了砂巖填隙物；粒間孔和長石溶孔為主要的巖石儲(chǔ)集體的孔隙空間；研究區(qū)長9砂巖成巖作用類型有機(jī)械壓實(shí)作用、壓溶作用、膠結(jié)作用、溶解作用以及交代作用,成巖作用已進(jìn)入中成巖階段A期；研究區(qū)長9孔隙度平均值為9.87%,滲透率平均值為0.847×10-3μm2,屬于低孔、特低孔-特低滲儲(chǔ)層。研究表明：長7良好的烴源巖為胡尖山地區(qū)長9油藏提供油源；河道砂體是油氣賦集的重要場所；砂巖透鏡體和上傾方向的巖性遮擋條件是油氣保存和賦集的保證；疊合連片的河道砂體和裂縫體系是油氣運(yùn)移的主要通道。結(jié)合以上研究,最終總結(jié)了研究區(qū)長9油藏含油性控制因素。
[Abstract]:Hujianshan area is located in the central and western part of the Yishan slope of Ordos Basin, and it is also one of the important oil and gas producing areas in Ordos Basin. There are many oil-bearing series in this area, which are Chang8, Chang7, Chang6, Chang 3 and Jurassic multi-reservoir composite oil-bearing areas, and the scale of construction is gradually expanded, which shows a good exploration prospect in Hujianshan area. Hu Jianshan Chang 9 is a newly discovered strata in recent years. The characteristics of Chang 9 reservoir and the controlling factors of oil content in Hujian Mountain area are deeply studied, which is of great guiding significance for the next exploration and development of this area. On the basis of previous studies, combined with core data, logging data, analysis test data and oil test data, this study is guided by sedimentary petrology, logging geology, petroleum geology and other disciplines, and synthesizes the regional geological background. The sedimentary facies, reservoir geological characteristics and oil-bearing controlling factors of Chang 9 member in Hujianshan area are studied, and on this basis, the favorable zone of production and construction is put forward. It is considered that the Chang9 layer structure in Hujianshan area tends to be relaxed, and several low amplitude nasal uplift secondary structures in the near east-west direction develop well in the background of monoclinic structure. From north to south, it is transformed from Delta plain subphase to underwater reductive phase along the channel, that is to say, the delta front subphase constitutes the subphase state, shunt channel and underwater shunt channel of the delta sedimentary phase of Chang9 reservoir in the study area. The sedimentary microfacies such as land natural embankment, underwater natural embankment, shunt bay, swampy and so on can be determined by a variety of characterization parameters. Sedimentary evolution is diverse. Grayish-white, grayish-green medium-fine feldspar sandstone is the main composition of Chang9 sandstone in this area, and many minerals such as chlorite, siliceous and iron calcite constitute sandstone filling. Intergranular pores and feldspar dissolved pores are the main pore spaces of rock reservoirs. The diagenetic types of Chang9 sandstone in the study area are mechanical compaction, cementation, dissolution and metasomatism. Diagenetic process has entered the middle diagenetic stage A. The average porosity of 9 in the study area is 9.87%, and the average permeability is 0.847 脳 10 ~ (- 3) 渭 m ~ 2. It belongs to low porosity, ultra-low porosity and ultra-low permeability reservoir. The results show that the good source rocks of Chang 7 provide oil source for Chang 9 reservoir in Hujianshan area, the channel sand body is an important place for oil and gas accumulation, and the lithologic occlusion conditions of sandstone lens and updip direction are the guarantee of oil and gas preservation and accumulation. Superimposed channel sand bodies and fracture systems are the main channels for oil and gas migration. Combined with the above research, the controlling factors of oil content in Chang 9 reservoir in the study area are summarized.
【學(xué)位授予單位】：西北大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.13
[Abstract]:Hujianshan area is located in the central and western part of the Yishan slope of Ordos Basin, and it is also one of the important oil and gas producing areas in Ordos Basin. There are many oil-bearing series in this area, which are Chang8, Chang7, Chang6, Chang 3 and Jurassic multi-reservoir composite oil-bearing areas, and the scale of construction is gradually expanded, which shows a good exploration prospect in Hujianshan area. Hu Jianshan Chang 9 is a newly discovered strata in recent years. The characteristics of Chang 9 reservoir and the controlling factors of oil content in Hujian Mountain area are deeply studied, which is of great guiding significance for the next exploration and development of this area. On the basis of previous studies, combined with core data, logging data, analysis test data and oil test data, this study is guided by sedimentary petrology, logging geology, petroleum geology and other disciplines, and synthesizes the regional geological background. The sedimentary facies, reservoir geological characteristics and oil-bearing controlling factors of Chang 9 member in Hujianshan area are studied, and on this basis, the favorable zone of production and construction is put forward. It is considered that the Chang9 layer structure in Hujianshan area tends to be relaxed, and several low amplitude nasal uplift secondary structures in the near east-west direction develop well in the background of monoclinic structure. From north to south, it is transformed from Delta plain subphase to underwater reductive phase along the channel, that is to say, the delta front subphase constitutes the subphase state, shunt channel and underwater shunt channel of the delta sedimentary phase of Chang9 reservoir in the study area. The sedimentary microfacies such as land natural embankment, underwater natural embankment, shunt bay, swampy and so on can be determined by a variety of characterization parameters. Sedimentary evolution is diverse. Grayish-white, grayish-green medium-fine feldspar sandstone is the main composition of Chang9 sandstone in this area, and many minerals such as chlorite, siliceous and iron calcite constitute sandstone filling. Intergranular pores and feldspar dissolved pores are the main pore spaces of rock reservoirs. The diagenetic types of Chang9 sandstone in the study area are mechanical compaction, cementation, dissolution and metasomatism. Diagenetic process has entered the middle diagenetic stage A. The average porosity of 9 in the study area is 9.87%, and the average permeability is 0.847 脳 10 ~ (- 3) 渭 m ~ 2. It belongs to low porosity, ultra-low porosity and ultra-low permeability reservoir. The results show that the good source rocks of Chang 7 provide oil source for Chang 9 reservoir in Hujianshan area, the channel sand body is an important place for oil and gas accumulation, and the lithologic occlusion conditions of sandstone lens and updip direction are the guarantee of oil and gas preservation and accumulation. Superimposed channel sand bodies and fracture systems are the main channels for oil and gas migration. Combined with the above research, the controlling factors of oil content in Chang 9 reservoir in the study area are summarized.
【學(xué)位授予單位】：西北大學(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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