發(fā)布時間：2018-05-17 08:33

  本文選題：東勝氣田 + 成巖作用　； 參考：《中國石油大學(xué)(華東)》2015年碩士論文

【摘要】：本文以東勝氣田上古生界儲層為研究對象,通過巖石普通薄片觀察、鑄體薄片鑒定和掃描電鏡等分析測試手段,結(jié)合粘土礦物分析、全巖礦物分析和壓汞測試分析等分析測試結(jié)果,對東勝氣田上古生界儲層的巖石學(xué)特征、孔喉結(jié)構(gòu)和物性特征進行詳細的描述和分析比對,分析了成巖作用及其成巖演化過程,并結(jié)合沉積作用和構(gòu)造作用對儲層物性的影響因素進行分析探討,明確了儲層物性的控制因素。以研究區(qū)的鑄體薄片為研究對象,結(jié)合室內(nèi)各種分析測試成果,明確了不同地層的儲層基本特征。太原組和山1段石英含量高,巖性主要為亞巖屑砂巖,孔隙以剩余粒間孔為主。山2段和下石盒子組長石和巖屑的含量較高,主要為巖屑砂巖、亞巖屑砂巖和長石質(zhì)巖屑砂巖,含有較多高嶺石,長石和高嶺石在伯爾江海子斷裂北部的含量遠高于斷層南部,孔隙以次生溶蝕孔隙和晶間孔為主�？紫抖戎饕獮�4~18%,而滲透率則主要為0.1~10×10-3μm2,為中孔低滲儲層�？傮w呈現(xiàn)北部物性好,南部較差的特點。成巖作用發(fā)育壓實壓溶作用、含鐵碳酸鹽膠結(jié)交代作用、硅質(zhì)和粘土礦物(高嶺石、伊利石和綠泥石)膠結(jié)作用等。北部高嶺石含量高,溶蝕作用強,成巖階段處于中成巖A2段,南部壓實強、石英自生加大發(fā)育,成巖階段處于中成巖B階段。分析認為研究區(qū)南部可能發(fā)生高嶺石和鉀長石反應(yīng)轉(zhuǎn)化為伊利石的作用,因而斷層南部長石和高嶺石的含量都明顯低于斷層北部。分別對山1段、太原組和山2段、下石盒子組分析物性控制因素。山1段和太原組壓實作用為主要減孔因素,粒度和物性有較好的相關(guān)性,粗粒及含礫粗砂巖具有較好的物性。山2段和下石盒子組沉積微相均以辮狀河河道和水下分流河道物性最好,南部主控因素為粒度,粗砂巖具有較好的物性,北部主控因素為成巖作用,溶蝕作用強烈的區(qū)域物性較好。綜合考慮儲層的物性、孔喉特征、微觀特征和巖性,研究區(qū)上古生界儲層劃分為優(yōu)質(zhì)儲層、較好儲層、一般儲層和遠景儲層。盒一段、盒二段和盒三段優(yōu)質(zhì)儲層有利區(qū)面積相對較大,山西組和太原組優(yōu)質(zhì)儲層有利區(qū)帶面積相對較小。太原組和山1段主要發(fā)育較好儲層。山2段和下石盒子優(yōu)質(zhì)儲層主要發(fā)育于斷層北部,斷層南部局部發(fā)育優(yōu)質(zhì)儲層。
[Abstract]:In this paper, the upper Paleozoic reservoir of Dongsheng gas field is taken as the research object. Through the observation of ordinary thin sections of rock, the identification of casting thin sections and the scanning electron microscope, the paper combines the analysis of clay minerals. The petrological characteristics, pore throat structure and physical properties of Upper Paleozoic reservoirs in Dongsheng Gas Field are described and compared in detail, and the diagenesis and diagenetic evolution process are analyzed. Combined with sedimentation and tectonism, the influencing factors of reservoir physical properties are analyzed and discussed, and the controlling factors of reservoir physical properties are clarified. The basic reservoir characteristics of different strata are defined by taking the casting thin section of the study area as the research object and combining with the indoor analysis and test results. The quartz content of Taiyuan formation and Shan 1 member is high, the lithology is mainly sublithic sandstone, and the pore is mainly residual intergranular pore. The content of rock and lithic rocks in Shan2 formation and Lower Shihezi formation are relatively high, mainly lithic sandstone, sublithic sandstone and feldspathic lithic sandstone, which contain more kaolinite. The content of feldspar and kaolinite in the northern part of the Berjianghaizi fault is much higher than that in the southern part of the fault. The pores are mainly secondary dissolution pores and intergranular pores. The porosity is 4 ~ (18) and the permeability is 0.1 ~ 10 脳 10 ~ (-3) 渭 m ~ (2), which is a medium porosity and low permeability reservoir. In general, the physical properties of the north are good and the south is poor. The diagenesis developed compaction pressure dissolution, iron carbonate cementation and metasomatism, siliceous and clay minerals (kaolinite, Illite and chlorite) cementation. The content of kaolinite in the north is high, the dissolution is strong, the diagenetic stage is in the middle diagenetic A2 section, the southern part is compacted strongly, the quartz is growing in itself, and the diagenetic stage is in the middle diagenetic stage B. It is considered that the reaction between kaolinite and potassium feldspar may be transformed into Illite in the southern part of the study area, so the contents of feldspar and kaolinite in the southern part of the fault are obviously lower than those in the northern part of the fault. The controlling factors of physical properties were analyzed for Shan 1, Taiyuan and Shan 2, and Lower Shihezi formation, respectively. The compaction of Shan 1 member and Taiyuan formation is the main factor of reducing pore size and physical properties. The coarse grain and gravel coarse sandstone have better physical properties. The sedimentary microfacies of Shan 2 member and Lower Shihezi formation are the best in braided river channel and underwater distributary channel, the main controlling factors in the south are granularity, the coarse sandstone has better physical property, and the diagenesis is the main controlling factor in the north. The region with strong dissolution has better physical properties. Considering the physical properties, pore throat characteristics, microcosmic characteristics and lithology, the Upper Paleozoic reservoirs in the study area are divided into high quality reservoirs, better reservoirs, general reservoirs and prospective reservoirs. The favorable area of high quality reservoir is relatively large in the first member, the second member and the third member, and the area of favorable zone is relatively small in Shanxi formation and Taiyuan formation. Taiyuan formation and Shan 1 member are mainly well developed reservoirs. The high quality reservoirs in Shan2 and Xiashihezi are mainly developed in the northern part of the fault, and the high quality reservoirs are developed locally in the southern part of the fault.
【學(xué)位授予單位】：中國石油大學(xué)(華東)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P618.13

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