發(fā)布時(shí)間：2018-06-08 08:01

  本文選題：威信凹陷 + 頁(yè)巖氣　； 參考：《地質(zhì)科技情報(bào)》2017年03期

【摘要】：下志留統(tǒng)龍馬溪組是威信凹陷頁(yè)巖氣重點(diǎn)勘探評(píng)價(jià)層系之一。以威信凹陷下志留統(tǒng)龍馬溪組為研究對(duì)象,通過(guò)5口井的孔滲、比表面、X衍射礦物分析、有機(jī)質(zhì)含量、鏡質(zhì)體反射率、三軸應(yīng)力實(shí)驗(yàn)和常規(guī)測(cè)井以及ECS測(cè)井?dāng)?shù)據(jù)分析了該頁(yè)巖儲(chǔ)層的地球化學(xué)特征、儲(chǔ)存能力、礦物成分以及儲(chǔ)層力學(xué)特性。結(jié)果表明:與北美及四川礁石壩頁(yè)巖比較,該頁(yè)巖儲(chǔ)層有機(jī)質(zhì)豐度一般,成熟度高,地球化學(xué)特征有利于大量生烴;吸附性較好,孔滲性較低,表現(xiàn)出較好的存儲(chǔ)特性和較差的物性;脆性礦物含量適中,楊氏模量適中,但泊松比較小,儲(chǔ)層表現(xiàn)出較好的脆性;在縱向上,龍馬溪組下部泥巖層具有較大的w(TOC)值與較好的孔滲特性,且脆性礦物含量普遍高于上部,較上部表現(xiàn)出更好的開(kāi)發(fā)潛力。
[Abstract]:Longmaxi formation of Lower Silurian is one of the important strata for shale gas exploration and evaluation in Weixin sag. Taking Longmaxi formation of Lower Silurian in Weixin depression as the research object, through the porosity and permeability of 5 wells, X ray diffraction mineral analysis of specific surface, organic matter content, vitrinite reflectance, etc. The geochemical characteristics, storage capacity, mineral composition and mechanical properties of the shale reservoir are analyzed by triaxial stress test, conventional logging and ECS logging data. The results show that compared with the rocks shale of North America and Sichuan, the shale reservoir has the advantages of general abundance of organic matter, high maturity, favorable geochemical characteristics for hydrocarbon generation, good adsorption and low porosity and permeability. It shows better storage characteristics and poor physical properties, moderate content of brittle minerals, moderate Young's modulus, but relatively small Poisson, and better brittleness of reservoir; longitudinally, The lower mudstone layer of Longmaxi formation has a larger wantone value and better porosity and permeability characteristics, and the content of brittle minerals is generally higher than that of the upper part, which shows better exploitation potential than that of the upper part.
【作者單位】： 中國(guó)地質(zhì)大學(xué)(北京)能源學(xué)院;中國(guó)石油集團(tuán)測(cè)井有限公司技術(shù)中心;
【基金】：中國(guó)石油股份公司重大科技專(zhuān)項(xiàng)“深層高溫高壓測(cè)井巖石物理與成像評(píng)價(jià)技術(shù)研究”(2014E-3205)
【分類(lèi)號(hào)】：P618.13

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