發(fā)布時(shí)間：2018-05-09 09:31

  本文選題：川中 + 震旦系��； 參考：《巖石學(xué)報(bào)》2017年04期

【摘要】：四川盆地川中地區(qū)震旦系氣藏儲(chǔ)量規(guī)模大,儲(chǔ)層分布面積廣。在Folk(1959)碳酸鹽巖分類方案與張蔭本等(1996)對(duì)粘結(jié)巖分類方案研究的基礎(chǔ)之上,結(jié)合四川盆地震旦系燈影組的具體情況,提出新的劃分方案。研究表明:(1)高石梯-磨溪地區(qū)震旦系燈影組碳酸鹽巖巖石類型可分為3個(gè)亞類,10個(gè)微類。該方案不同之處在于把凝塊(石)云巖歸位顆粒巖,同時(shí)根據(jù)藻的形態(tài)把藻云巖進(jìn)一步細(xì)分;(2)沉積巖類的發(fā)育和分布受沉積層序的控制。海侵體系域(TST)沉積階段,以泥-粉晶云巖、微生物巖等正化學(xué)巖沉積為主。高位體系域(HST)沉積階段,以凝塊云巖、砂屑云巖等異化顆粒巖沉積為主�？v向上,巖性具有從暗色泥晶云巖→藻云巖→顆粒云巖→淺色泥晶云巖演化的特征,即瀉湖亞相→藻丘亞相→顆粒灘亞相→臺(tái)坪亞相的規(guī)律;(3)凝塊云巖、砂屑云巖等顆粒巖是主要的儲(chǔ)集巖類;(4)燈影組碳酸鹽巖不同巖類的發(fā)育和分布對(duì)儲(chǔ)層的發(fā)育起到控制作用。對(duì)燈影組的油氣勘探,除了對(duì)巖溶作用的研究之外,還需要重視沉積古地貌、巖相展布特征的分析,有助于有效的預(yù)測(cè)燈影組儲(chǔ)層"甜點(diǎn)區(qū)"。
[Abstract]:The Sinian gas reservoir in Sichuan Basin has a large scale of reserves and a wide distribution area. On the basis of the study on the classification scheme of carbonate rocks of Folkian 1959 and Zhang Yimen et al. 1996), a new classification scheme is put forward according to the concrete situation of the Dengying formation of Sinian system in Sichuan Basin. The study shows that the carbonate rock types of the Dengying formation of the Sinian system in Gaoshiti-Moxi area can be divided into 3 subclasses and 10 microclasses. The difference of this scheme is that the condensate (stone) dolomite is integrated into granular rock, and the development and distribution of algal dolomite are further subdivided according to the algae morphology. The development and distribution of sedimentary rocks are controlled by the sedimentary sequence. In the transgressive system tracts (TST) sedimentary stage, the main deposits are mud-powdery dolomite, microbial rocks and other orthochemical rocks. In the high system tract (HST) sedimentary stage, the main sedimentary types are condensed dolomite, sandclastic dolomite and other dissimilated granular rocks. Longitudinally, the lithology is characterized by the evolution from dark mudstone to algal dolomite and grained dolomite, that is, lagoon subfacies, algal phylla subfacies, granular shoal subfacies and subfacies of Taiping subfacies, I. e., condensed dolomite. The development and distribution of carbonate rocks in Dengying formation play a controlling role in reservoir development. In addition to the study of karstification, the analysis of sedimentary paleogeomorphology and lithofacies distribution should be paid more attention to in the exploration of oil and gas in Dengying formation, which is helpful to effectively predict the "dessert area" of Dengying formation reservoir.
【作者單位】： 中國石油勘探開發(fā)研究院;中石油西南油氣田分公司勘探開發(fā)研究院;中國石油西南油氣田分公司;
【基金】：國家科技重大專項(xiàng)(2016ZX05007004) 中國石油天然氣股份有限公司重大勘探專項(xiàng)(2014E-3208(GF))聯(lián)合資助
【分類號(hào)】：P534.31;P618.13

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本文編號(hào)：1865491