本文選題：侏羅系 + 孔隙結(jié)構(gòu)　； 參考：《科學(xué)技術(shù)與工程》2017年29期

【摘要】：綜合根據(jù)野外地質(zhì)剖面、薄片鑒定、X-衍射、場(chǎng)發(fā)射掃描電鏡、儲(chǔ)層物性、孔隙結(jié)構(gòu)、脆性指數(shù)、有機(jī)碳含量(TOC)、生烴潛力(S1+S2)和巖石力學(xué)分析,確定了川中地區(qū)大安寨段有利儲(chǔ)層為介殼灰?guī)r和泥頁(yè)巖為薄互層狀巖石組合,大一三亞段為相對(duì)優(yōu)質(zhì)的儲(chǔ)集體。其脆性礦物含量明顯高于大一和大三亞段,有利于產(chǎn)生天然裂縫和儲(chǔ)層后期的壓裂改造。有機(jī)碳含量(TOC)平均值為1.2%,生烴潛力(S1+S2)為1.1 mg/g,具有較高的生油氣潛力。通過巖石薄片和鑄體薄片分析發(fā)現(xiàn)大安寨段致密油儲(chǔ)層為孔隙-裂縫型儲(chǔ)層。運(yùn)用高壓壓汞資料、儲(chǔ)層物性資料等多種技術(shù)分析大安寨段儲(chǔ)層物性特征,結(jié)果表明大安寨段儲(chǔ)層有低孔、低滲的特征。掃描電鏡分析結(jié)果明確了儲(chǔ)層微米-納米級(jí)孔隙發(fā)育和分布規(guī)律。黏土礦物顆粒之間的粒間孔在大一三亞段上部最為發(fā)育,與有機(jī)質(zhì)發(fā)育相關(guān)的有機(jī)質(zhì)孔和晶間孔在大一三亞段上部連通性比較好。綜合分析判斷大一三亞段上部為川中地區(qū)大安寨段儲(chǔ)層勘探開發(fā)潛力區(qū)。
[Abstract]:According to the field geological profile, thin section identification of X-diffraction, field emission scanning electron microscope, reservoir physical property, pore structure, brittle index, organic carbon content, hydrocarbon generation potential, S 1 S 2) and rock mechanics analysis, The favorable reservoirs of Da'anzhai formation in central Sichuan are composed of thin interbedded rock assemblages of meso-limestone and shale and relatively high quality reservoirs in the first and third sub-member of Sichuan. The content of brittle minerals is obviously higher than that of the first and third member, which is beneficial to the formation of natural fractures and the later fracturing of reservoirs. The average value of organic carbon content (TOC) is 1.2%, and the hydrocarbon generation potential (S1S2) is 1.1 mg / g, which has high hydrocarbon generation potential. It is found that the tight oil reservoir of Da'anzhai formation is a porosity-fracture reservoir through the analysis of thin rock and cast thin sections. The characteristics of reservoir physical properties of Da'anzhai member are analyzed by using high-pressure mercury injection data and reservoir physical property data. The results show that the reservoir of Da'anzhai section has the characteristics of low porosity and low permeability. The development and distribution of micrometer-nanoscale pores in reservoirs were confirmed by SEM analysis. The intergranular pores between clay mineral particles are most developed in the upper part of Da-San sub-member, and the organic and intergranular pores related to the development of organic matter are better connected in the upper part of Data-Sansub section. Comprehensive analysis shows that the upper part of the first Sanya section is the reservoir exploration and development potential area of Da'anzhai member in the central Sichuan area.
【作者單位】： 西南石油大學(xué)油氣藏地質(zhì)及開發(fā)工程國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【分類號(hào)】：P618.13

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