本文選題：東營(yíng)凹陷 + 致密砂巖��； 參考：《成都理工大學(xué)》2017年碩士論文

【摘要】：隨著油氣勘探理論和開(kāi)發(fā)技術(shù)的進(jìn)步,致密砂巖油藏越來(lái)越引起人們的關(guān)注。致密砂巖油儲(chǔ)層非均質(zhì)性強(qiáng),儲(chǔ)層孔隙結(jié)構(gòu)復(fù)雜,儲(chǔ)層孔喉大小為納米—微米分布。為了研究東營(yíng)凹陷樊154區(qū)塊沙河街組致密砂巖孔隙結(jié)構(gòu)特征,本論文利用鑄體薄片、掃描電鏡、常規(guī)壓汞、恒速壓汞和核磁共振等技術(shù)手段,分析了研究區(qū)沙河街組致密砂巖儲(chǔ)層巖石學(xué)特征、孔隙類型和孔隙結(jié)構(gòu)等特征,并對(duì)儲(chǔ)層進(jìn)行了分類。根據(jù)鑄體薄片和掃描電鏡觀察以及X衍射資料,樊154區(qū)塊沙河街組致密砂巖主要為細(xì)粒巖屑砂巖,分選和磨圓中等,線接觸,孔隙式膠結(jié)。儲(chǔ)層填隙物含量較高,以粘土礦物為主。儲(chǔ)層主要孔隙類型為粒間孔、粒內(nèi)溶孔和晶間微孔。喉道類型以片狀、彎片狀和管束狀為主。恒速壓汞刻畫(huà)了儲(chǔ)層中喉道半徑在0.12μm以上的喉道和連通孔隙的分布情況,儲(chǔ)層孔隙半徑主要分布在90~200μm,該部分孔隙體積只占總孔隙體積的30%或更小,喉道半徑主要分布在0.4~2μm,孔喉比100~300。喉道半徑細(xì)小,孔喉比大,是造成的流體滲流困難和開(kāi)發(fā)難度大的主要原因。運(yùn)用核磁共振儀器分別測(cè)試了巖樣飽和流體和離心后的T_2譜,分析了致密砂巖的可動(dòng)流體特征。巖樣飽和流體和離心后的T_2譜均為單峰,可動(dòng)流體孔隙空間弛豫時(shí)間在10~100ms之間,可動(dòng)流體飽和度為9.2%~52.2%。結(jié)合壓汞、鑄體薄片和掃描電鏡觀察,可動(dòng)流體空間主要為與亞微米級(jí)喉道連通的粒間孔,而晶間微孔和溶蝕微孔,且受納米級(jí)喉道控制,流體無(wú)法流動(dòng)。根據(jù)常規(guī)壓汞、鑄體薄片、掃描電鏡和核磁共振等測(cè)試,將研究區(qū)致密砂巖儲(chǔ)層分為兩類:Ⅰ類孔隙度為16.5%~20.7%,滲透率為0.062~0.562×10-3μm~2,排驅(qū)壓力為0.78~2.06MPa,中值壓力為3.25~10.14MPa,可動(dòng)流體飽和度在44.6%~52.2%,填隙物含量在9%~12%,主要孔隙類型為粒間孔、粒內(nèi)溶孔和晶間微孔,喉道以片狀、彎片狀和管束狀喉道為主。Ⅱ類孔隙度在9.96%~16.9%,滲透率為0.006~0.111×10~(-3)μm~2,排驅(qū)壓力為2.23~6.41MPa,中值壓力為11.54~54.85MPa,可動(dòng)流體飽和度在9.2%~25.8%。填隙物含量11~28%,主要孔隙類型為殘余粒間孔隙、溶蝕微孔和晶間微孔,喉道以管束狀喉道為主。
[Abstract]:With the development of oil and gas exploration theory and technology, tight sandstone reservoir has attracted more and more attention. The tight sandstone oil reservoir with strong heterogeneity reservoir, complex pore structure, pore throat size distribution of nano - micron. In order to study the Dongying depression fan 154 block of Shahe Street Group sandstone pore structure characteristics of casting this paper uses thin section, scanning electron microscope, mercury injection, constant speed mercury injection and nuclear magnetic resonance method, the analysis of the Shahe Street group of tight sandstone reservoir petrology, pore types and pore structure characteristics, and the classification of reservoir. According to the casting thin sections and scanning electron microscope and X diffraction data, fan 154 block of Shahe Street Group sandstone is mainly of fine-grained lithic sandstone, sorting and grinding medium, line contact, pore cementation. Reservoir filler content is high, with clay minerals. The main pore reservoir Type is intergranular pores, intragranular dissolved pores and intergranular pores. Throat type flaky, curved sheet and tube bundle. The constant pressure characterizes the reservoir pore throat radius at 0.12 m above the throat and pore distribution, pore radius is mainly distributed in 90~200 m the pore volume, total pore volume of 30% or less, the throat radius is mainly distributed in the 0.4~2 m, pore throat radius smaller than 100~300., large pore throat ratio, fluid flow is caused by the difficulties and the difficulty of developing the main cause. Using NMR samples were tested and the fluid saturation after centrifugation and T_2 spectrum analysis of movable fluid characteristics of tight sandstone. The rock and fluid saturated after centrifugation T_2 spectra were single peak, the pore space of movable fluid relaxation time between 10~100ms, the movable fluid saturation for 9.2%~52.2%. combined with mercury, casting thin sections and scanning electron microscopy Observation of the movable fluid space is mainly connected with sub micron throat intergranular pores, intergranular pores and dissolution pores and nano, and by the throat control fluid, not flow. According to the conventional mercury injection, casting thin sections, scanning electron microscopy and NMR spectra, the study area is divided into dense sandstone reservoir two types: the first type of porosity is 16.5%~20.7%, permeability of 0.062~0.562 * 10-3 m~2, the displacement pressure is 0.78~2.06MPa, the median pressure is 3.25~10.14MPa, the movable fluid saturation in 44.6%~52.2%, the amount of interstitial material in 9%~12%, the main pore types are intergranular pores, intragranular dissolved pores and intergranular pore throat, lamellar, curved sheet and bundled tubes throat. Class II porosity in 9.96%~16.9%, permeability is 0.006~0.111 * 10~ (-3) m~2, the displacement pressure is 2.23~6.41MPa, the median pressure is 11.54~54.85MPa in the 11~28% 9.2%~25.8%., movable fluid saturation, filler content, main hole The type of gap is residual intergranular pore, dissolution of micropore and intergranular micropore, and laryngeal tract is dominated by tube bundle throat.

【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：P618.13

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