吉木薩爾凹陷蘆草溝組致密油儲(chǔ)層溶蝕孔隙特征及成因機(jī)理
本文關(guān)鍵詞: 致密油儲(chǔ)層 溶蝕孔隙 成因機(jī)理 蘆草溝組 吉木薩爾凹陷 出處:《巖性油氣藏》2017年03期 論文類型:期刊論文
【摘要】:針對(duì)吉木薩爾凹陷蘆草溝組致密油儲(chǔ)層溶蝕孔隙較發(fā)育,但控制因素及成因機(jī)理認(rèn)識(shí)程度低的問(wèn)題,利用巖心、鑄體薄片和掃描電鏡觀察以及物性測(cè)試等方法,結(jié)合礦物成分、油氣成藏演化和成巖演化等分析,對(duì)研究區(qū)孔隙類型及特征、溶蝕孔隙成因機(jī)理及分布規(guī)律進(jìn)行了研究。結(jié)果表明:吉木薩爾凹陷蘆草溝組致密油陸源碎屑巖、內(nèi)源沉積巖及火山碎屑巖3種巖石類型儲(chǔ)層中均發(fā)育有溶蝕孔隙,其形成受內(nèi)部和外部因素共同制約,有機(jī)酸溶蝕長(zhǎng)石類及碳酸鹽巖類等易溶礦物組分是其形成的主要方式;蘆草溝組二段中部的巖屑長(zhǎng)石粉細(xì)砂巖儲(chǔ)層溶蝕孔隙發(fā)育程度高、物性好、厚度相對(duì)較大、平面分布較為穩(wěn)定,是下一步致密油勘探開(kāi)發(fā)的重點(diǎn)層位。
[Abstract]:In view of the problem that the dissolution porosity of dense oil reservoir of Lucaogou formation in Jimusar sag is relatively developed, but the controlling factors and genetic mechanism are low, the methods of core, casting sheet, scanning electron microscope and physical property testing are used. Combined with mineral composition, oil and gas accumulation evolution and diagenetic evolution, the pore types and characteristics in the study area are analyzed. The formation mechanism and distribution of dissolved pores are studied. The results show that the Lucaogou formation of Jimusar sag is a compact continental clastic rock. Dissolution pores are developed in the three types of rock reservoirs of internal sedimentary rocks and pyroclastic rocks, and their formation is restricted by both internal and external factors. Soluble mineral components such as organic acid dissolution feldspar and carbonate rock are the main forms of formation. The lithic feldspar siltstone fine sandstone reservoir in the middle part of the second member of the Lucaogou formation has high dissolution porosity, good physical properties, relatively large thickness and stable plane distribution, which is the key horizon for the exploration and development of compact oil in the next step.
【作者單位】: 中國(guó)石油勘探開(kāi)發(fā)研究院;中國(guó)石油新疆油田分公司勘探開(kāi)發(fā)研究院;
【基金】:國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(973計(jì)劃)項(xiàng)目“陸相致密油甜點(diǎn)成因機(jī)制與精細(xì)表征”(編號(hào):2015CB250901)資助
【分類號(hào)】:P618.13
【正文快照】: 0引言近10年來(lái),國(guó)內(nèi)外致密油勘探開(kāi)發(fā)均取得了重要進(jìn)展,致密油已成為非常規(guī)石油中最現(xiàn)實(shí)的勘探開(kāi)發(fā)領(lǐng)域[1-4]。國(guó)外在致密油儲(chǔ)層微觀孔隙結(jié)構(gòu)研究方面起步較早,開(kāi)發(fā)了多種微觀測(cè)試技術(shù)和方法,并形成了新的理論體系,而國(guó)內(nèi)的相關(guān)研究才剛剛起步[5]。溶蝕孔隙作為致密油儲(chǔ)層中重
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