發(fā)布時(shí)間：2018-02-24 13:45

  本文關(guān)鍵詞： 華鎣西地區(qū) 石炭系 黃龍組 白云巖儲(chǔ)層 儲(chǔ)層特征　出處：《西南石油大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：本論文主要以碳酸鹽巖沉積學(xué)、儲(chǔ)層地質(zhì)學(xué)、巖石學(xué)、構(gòu)造地質(zhì)學(xué)、測(cè)井地質(zhì)學(xué)、開發(fā)地質(zhì)學(xué)等理論為指導(dǎo),綜合應(yīng)用地質(zhì)、測(cè)井、巖心、分析化驗(yàn)及生產(chǎn)動(dòng)態(tài)等資料,參考前人研究成果,開展華鎣西石炭系地層展布、優(yōu)勢(shì)沉積微相、儲(chǔ)層特征、成巖作用對(duì)儲(chǔ)層發(fā)育的控制等方面的研究。 華鎣西石炭系地層巖性穩(wěn)定,界面清楚,可比性良好。石炭系總厚度具有由北向南、自東向西逐漸減薄乃至尖滅的展布特征。華鎣西石炭系的沉積環(huán)境主要為：顆粒灘、灘間微相、砂坪、藻云坪、泥云坪。潮間帶白云化的顆粒灘微相和云坪微相儲(chǔ)層發(fā)育最好,潮上帶的藻云坪和潮下帶的灰云坪的儲(chǔ)層則相對(duì)較差。研究區(qū)巖石類型以白云巖為主,其次為灰?guī)r。礦物組合主要為白云石、方解石,含少量有機(jī)質(zhì)、黃鐵礦、石英、瀝青、石膏及螢石。 研究區(qū)儲(chǔ)集巖類型主要以顆粒云巖、晶粒云巖為主,灰?guī)r儲(chǔ)層基本不發(fā)育。巖心及薄片觀察結(jié)果顯示,孔隙為主要的儲(chǔ)集空間�？紫兑粤ｉg孔、粒內(nèi)溶孔和晶間孔為主,裂縫在研究區(qū)不發(fā)育,石炭系儲(chǔ)層屬于(溶)孔隙型儲(chǔ)層。華鎣西石炭系儲(chǔ)層整體上發(fā)育較好,但橫向非均質(zhì)性較強(qiáng),以Ⅲ類儲(chǔ)層為主。黃龍二段是儲(chǔ)層發(fā)育的主要層段。孔隙度算術(shù)平均值為2.07%,滲透率平均值為0.67mD,儲(chǔ)層在總體上為低孔、低滲儲(chǔ)層。 自石炭系沉積后,由于地殼反復(fù)升降,沉積物受到不同程度的改造、破壞,成巖作用變得異常復(fù)雜,直接影響到巖石組構(gòu)和儲(chǔ)層孔隙結(jié)構(gòu)的變化。影響和控制本區(qū)儲(chǔ)層發(fā)育的主要成巖作用有壓實(shí)作用、膠結(jié)作用、溶蝕作用及白云化作用等。其中,壓實(shí)作用和膠結(jié)作用對(duì)儲(chǔ)層的發(fā)育起著破壞性作用,它們都可以使儲(chǔ)層的孔隙度減少。溶蝕作用和白云化作用對(duì)儲(chǔ)層的發(fā)育起著建設(shè)性作用,它們都可以改善儲(chǔ)層。
[Abstract]:Guided by the theories of carbonate sedimentology, reservoir geology, petrology, tectonic geology, well logging geology and development geology, this paper synthetically applies the data of geology, logging, core, analysis, test and production. Referring to the previous research results, the study on the distribution of Carboniferous strata, dominant sedimentary microfacies, reservoir characteristics and diagenesis control on reservoir development was carried out in the west of Huaying. The lithology of the Carboniferous strata in West Huaying is stable, the interface is clear and the comparability is good. The total thickness of Carboniferous system has the characteristics of spreading from north to south, gradually thinning from east to west and even dipping out. The sedimentary environment of the Carboniferous in the west of Huaying is mainly as follows: granular beach. Interbeach microfacies, sand flat, algal cloud flat, mud cloud flat. The grain beach microfacies and cloud flat microfacies reservoirs with dolomitization in intertidal zone have the best development. The rock types in the study area are dolomite, followed by limestone. The mineral assemblages are mainly dolomite, calcite, small amount of organic matter, pyrite, quartz, asphalt, etc. Gypsum and fluorite. The types of reservoir rocks in the study area are mainly granular dolomite, grain dolomite and limestone reservoir. The core and thin slice observation results show that pore is the main reservoir space. The porosity is mainly intergranular pore, intragranular dissolved pore and intergranular pore. The fractures are not developed in the study area, and the Carboniferous reservoir belongs to (dissolved) pore type reservoir. The West Carboniferous reservoir of Huaying is well developed as a whole, but the lateral heterogeneity is strong. Huanglong second member is the main reservoir developed, the arithmetic average of porosity is 2.07 and the average permeability is 0.67mD. the reservoir is low porosity and low permeability on the whole. Since the Carboniferous deposits, because of the repeated rise and fall of the crust, the sediments have been transformed and destroyed to varying degrees, and the diagenesis has become extremely complicated. The main diagenesis affecting and controlling reservoir development in this area are compaction, cementation, dissolution and dolomitization. Compaction and cementation play a destructive role in reservoir development, both of which can reduce the porosity of the reservoir, and the dissolution and dolomitization play a constructive role in the development of the reservoir, both of which can improve the reservoir.
【學(xué)位授予單位】：西南石油大學(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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