【摘要】：元壩氣田長(zhǎng)興組氣藏主體為埋藏超深的緩坡型臺(tái)緣生物礁氣藏,為解決氣藏開(kāi)發(fā)評(píng)價(jià)面臨的生物礁發(fā)育模式復(fù)雜多樣、儲(chǔ)層分布規(guī)律不清、超深薄儲(chǔ)層精確預(yù)測(cè)難度大等問(wèn)題,本文探討了海平面升降變化與生物礁發(fā)育模式的關(guān)系,分析了礁相白云巖儲(chǔ)層發(fā)育主控因素,提出了生物礁儲(chǔ)層預(yù)測(cè)的思路與方法,明確了生物礁儲(chǔ)層平面展布特征。研究表明:元壩地區(qū)長(zhǎng)興組地層中共發(fā)育4期生物礁,受古地貌和海平面升降變化控制,單礁體可分為單期礁和雙期(多期)礁兩種模式。礁群可分為縱向進(jìn)積式、縱向退積式、橫向遷移式、橫向并列式、復(fù)合疊加式5種模式;元壩地區(qū)生物礁儲(chǔ)層發(fā)育主要受沉積背景、海平面升降變化、建設(shè)性成巖作用及構(gòu)造破裂作用控制,垂向上儲(chǔ)層主要發(fā)育于礁蓋,橫向上主要發(fā)育于礁頂,礁后次之,礁前較差。
[Abstract]:The main body of Changxing formation gas reservoir in Yuanba gas field is buried and ultra-deep platform edge reef gas reservoir. In order to solve the problems of complex development model of reef, unclear reservoir distribution law and difficulty of accurate prediction of ultra-deep and thin reservoir, etc. In this paper, the relationship between the change of sea level rise and fall and the model of reef development is discussed. The main factors controlling the development of reef dolomite reservoir are analyzed, the thought and method of prediction of reef reservoir are put forward, and the flat distribution characteristics of reef reservoir are defined. The results show that the formation of Changxing formation in Yuanba area is characterized by four stages of reefs, which are controlled by paleogeomorphology and sea level fluctuation, and the single reef can be divided into two models: single reef and double stage reef. The reef group can be divided into five types: longitudinal progradation, longitudinal retrogradation, lateral migration, lateral parallel, compound superposition, and the reservoir development of reef in Yuanba area is mainly affected by sedimentary background, sea level rise and fall. Under the control of constructive diagenesis and structural rupture, the vertical reservoir is mainly developed in the reef cap, laterally in the top of the reef, then in the back of the reef, and then in the front of the reef.
【作者單位】： 中國(guó)石化西南油氣分公司;中國(guó)石化西南油氣分公司勘探開(kāi)發(fā)研究院;
【基金】：國(guó)家科技重大專項(xiàng)(2016ZX05017-005)
【分類號(hào)】：P618.13

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